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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

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David Woodhouse 2007-08-01 11:23:57 +01:00
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1
.gitignore vendored
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@ -7,6 +7,7 @@
#
.*
*.o
*.o.*
*.a
*.s
*.ko

5
CREDITS
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@ -966,6 +966,7 @@ N: Pekka Enberg
E: penberg@cs.helsinki.fi
W: http://www.cs.helsinki.fi/u/penberg/
D: Various kernel hacks, fixes, and cleanups.
D: Slab allocators
S: Finland
N: David Engebretsen
@ -1939,8 +1940,8 @@ D: for Menuconfig's lxdialog.
N: Christoph Lameter
E: christoph@lameter.com
D: Digiboard PC/Xe and PC/Xi, Digiboard EPCA
D: Early protocol filter for bridging code
D: Bug fixes
D: NUMA support, Slab allocators, Page migration
D: Scalability, Time subsystem
N: Paul Laufer
E: paul@laufernet.com

79
Documentation/DMA-API.txt
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@ -26,7 +26,7 @@ Part Ia - Using large dma-coherent buffers
void *
dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, int flag)
dma_addr_t *dma_handle, gfp_t flag)
void *
pci_alloc_consistent(struct pci_dev *dev, size_t size,
dma_addr_t *dma_handle)
@ -38,7 +38,7 @@ to make sure to flush the processor's write buffers before telling
devices to read that memory.)
This routine allocates a region of <size> bytes of consistent memory.
it also returns a <dma_handle> which may be cast to an unsigned
It also returns a <dma_handle> which may be cast to an unsigned
integer the same width as the bus and used as the physical address
base of the region.
@ -52,21 +52,21 @@ The simplest way to do that is to use the dma_pool calls (see below).
The flag parameter (dma_alloc_coherent only) allows the caller to
specify the GFP_ flags (see kmalloc) for the allocation (the
implementation may chose to ignore flags that affect the location of
implementation may choose to ignore flags that affect the location of
the returned memory, like GFP_DMA). For pci_alloc_consistent, you
must assume GFP_ATOMIC behaviour.
void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
void
pci_free_consistent(struct pci_dev *dev, size_t size, void *cpu_addr
pci_free_consistent(struct pci_dev *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
Free the region of consistent memory you previously allocated. dev,
size and dma_handle must all be the same as those passed into the
consistent allocate. cpu_addr must be the virtual address returned by
the consistent allocate
the consistent allocate.
Part Ib - Using small dma-coherent buffers
@ -77,9 +77,9 @@ To get this part of the dma_ API, you must #include <linux/dmapool.h>
Many drivers need lots of small dma-coherent memory regions for DMA
descriptors or I/O buffers. Rather than allocating in units of a page
or more using dma_alloc_coherent(), you can use DMA pools. These work
much like a struct kmem_cache, except that they use the dma-coherent allocator
much like a struct kmem_cache, except that they use the dma-coherent allocator,
not __get_free_pages(). Also, they understand common hardware constraints
for alignment, like queue heads needing to be aligned on N byte boundaries.
for alignment, like queue heads needing to be aligned on N-byte boundaries.
struct dma_pool *
@ -102,15 +102,15 @@ crossing restrictions, pass 0 for alloc; passing 4096 says memory allocated
from this pool must not cross 4KByte boundaries.
void *dma_pool_alloc(struct dma_pool *pool, int gfp_flags,
void *dma_pool_alloc(struct dma_pool *pool, gfp_t gfp_flags,
dma_addr_t *dma_handle);
void *pci_pool_alloc(struct pci_pool *pool, int gfp_flags,
void *pci_pool_alloc(struct pci_pool *pool, gfp_t gfp_flags,
dma_addr_t *dma_handle);
This allocates memory from the pool; the returned memory will meet the size
and alignment requirements specified at creation time. Pass GFP_ATOMIC to
prevent blocking, or if it's permitted (not in_interrupt, not holding SMP locks)
prevent blocking, or if it's permitted (not in_interrupt, not holding SMP locks),
pass GFP_KERNEL to allow blocking. Like dma_alloc_coherent(), this returns
two values: an address usable by the cpu, and the dma address usable by the
pool's device.
@ -123,7 +123,7 @@ pool's device.
dma_addr_t addr);
This puts memory back into the pool. The pool is what was passed to
the pool allocation routine; the cpu and dma addresses are what
the pool allocation routine; the cpu (vaddr) and dma addresses are what
were returned when that routine allocated the memory being freed.
@ -209,18 +209,18 @@ Notes: Not all memory regions in a machine can be mapped by this
API. Further, regions that appear to be physically contiguous in
kernel virtual space may not be contiguous as physical memory. Since
this API does not provide any scatter/gather capability, it will fail
if the user tries to map a non physically contiguous piece of memory.
if the user tries to map a non-physically contiguous piece of memory.
For this reason, it is recommended that memory mapped by this API be
obtained only from sources which guarantee to be physically contiguous
obtained only from sources which guarantee it to be physically contiguous
(like kmalloc).
Further, the physical address of the memory must be within the
dma_mask of the device (the dma_mask represents a bit mask of the
addressable region for the device. i.e. if the physical address of
addressable region for the device. I.e., if the physical address of
the memory anded with the dma_mask is still equal to the physical
address, then the device can perform DMA to the memory). In order to
ensure that the memory allocated by kmalloc is within the dma_mask,
the driver may specify various platform dependent flags to restrict
the driver may specify various platform-dependent flags to restrict
the physical memory range of the allocation (e.g. on x86, GFP_DMA
guarantees to be within the first 16Mb of available physical memory,
as required by ISA devices).
@ -244,14 +244,14 @@ are guaranteed also to be cache line boundaries).
DMA_TO_DEVICE synchronisation must be done after the last modification
of the memory region by the software and before it is handed off to
the driver. Once this primitive is used. Memory covered by this
primitive should be treated as read only by the device. If the device
the driver. Once this primitive is used, memory covered by this
primitive should be treated as read-only by the device. If the device
may write to it at any point, it should be DMA_BIDIRECTIONAL (see
below).
DMA_FROM_DEVICE synchronisation must be done before the driver
accesses data that may be changed by the device. This memory should
be treated as read only by the driver. If the driver needs to write
be treated as read-only by the driver. If the driver needs to write
to it at any point, it should be DMA_BIDIRECTIONAL (see below).
DMA_BIDIRECTIONAL requires special handling: it means that the driver
@ -261,7 +261,7 @@ you must always sync bidirectional memory twice: once before the
memory is handed off to the device (to make sure all memory changes
are flushed from the processor) and once before the data may be
accessed after being used by the device (to make sure any processor
cache lines are updated with data that the device may have changed.
cache lines are updated with data that the device may have changed).
void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
@ -302,8 +302,8 @@ pci_dma_mapping_error(dma_addr_t dma_addr)
In some circumstances dma_map_single and dma_map_page will fail to create
a mapping. A driver can check for these errors by testing the returned
dma address with dma_mapping_error(). A non zero return value means the mapping
could not be created and the driver should take appropriate action (eg
dma address with dma_mapping_error(). A non-zero return value means the mapping
could not be created and the driver should take appropriate action (e.g.
reduce current DMA mapping usage or delay and try again later).
int
@ -315,7 +315,7 @@ reduce current DMA mapping usage or delay and try again later).
Maps a scatter gather list from the block layer.
Returns: the number of physical segments mapped (this may be shorted
Returns: the number of physical segments mapped (this may be shorter
than <nents> passed in if the block layer determines that some
elements of the scatter/gather list are physically adjacent and thus
may be mapped with a single entry).
@ -357,7 +357,7 @@ accessed sg->address and sg->length as shown above.
pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
int nents, int direction)
unmap the previously mapped scatter/gather list. All the parameters
Unmap the previously mapped scatter/gather list. All the parameters
must be the same as those and passed in to the scatter/gather mapping
API.
@ -377,7 +377,7 @@ void
pci_dma_sync_sg(struct pci_dev *hwdev, struct scatterlist *sg,
int nelems, int direction)
synchronise a single contiguous or scatter/gather mapping. All the
Synchronise a single contiguous or scatter/gather mapping. All the
parameters must be the same as those passed into the single mapping
API.
@ -406,7 +406,7 @@ API at all.
void *
dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, int flag)
dma_addr_t *dma_handle, gfp_t flag)
Identical to dma_alloc_coherent() except that the platform will
choose to return either consistent or non-consistent memory as it sees
@ -426,34 +426,34 @@ void
dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
free memory allocated by the nonconsistent API. All parameters must
Free memory allocated by the nonconsistent API. All parameters must
be identical to those passed in (and returned by
dma_alloc_noncoherent()).
int
dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
returns true if the device dev is performing consistent DMA on the memory
Returns true if the device dev is performing consistent DMA on the memory
area pointed to by the dma_handle.
int
dma_get_cache_alignment(void)
returns the processor cache alignment. This is the absolute minimum
Returns the processor cache alignment. This is the absolute minimum
alignment *and* width that you must observe when either mapping
memory or doing partial flushes.
Notes: This API may return a number *larger* than the actual cache
line, but it will guarantee that one or more cache lines fit exactly
into the width returned by this call. It will also always be a power
of two for easy alignment
of two for easy alignment.
void
dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
does a partial sync. starting at offset and continuing for size. You
Does a partial sync, starting at offset and continuing for size. You
must be careful to observe the cache alignment and width when doing
anything like this. You must also be extra careful about accessing
memory you intend to sync partially.
@ -472,21 +472,20 @@ dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
dma_addr_t device_addr, size_t size, int
flags)
Declare region of memory to be handed out by dma_alloc_coherent when
it's asked for coherent memory for this device.
bus_addr is the physical address to which the memory is currently
assigned in the bus responding region (this will be used by the
platform to perform the mapping)
platform to perform the mapping).
device_addr is the physical address the device needs to be programmed
with actually to address this memory (this will be handed out as the
dma_addr_t in dma_alloc_coherent())
dma_addr_t in dma_alloc_coherent()).
size is the size of the area (must be multiples of PAGE_SIZE).
flags can be or'd together and are
flags can be or'd together and are:
DMA_MEMORY_MAP - request that the memory returned from
dma_alloc_coherent() be directly writable.
@ -494,7 +493,7 @@ dma_alloc_coherent() be directly writable.
DMA_MEMORY_IO - request that the memory returned from
dma_alloc_coherent() be addressable using read/write/memcpy_toio etc.
One or both of these flags must be present
One or both of these flags must be present.
DMA_MEMORY_INCLUDES_CHILDREN - make the declared memory be allocated by
dma_alloc_coherent of any child devices of this one (for memory residing
@ -528,7 +527,7 @@ dma_release_declared_memory(struct device *dev)
Remove the memory region previously declared from the system. This
API performs *no* in-use checking for this region and will return
unconditionally having removed all the required structures. It is the
drivers job to ensure that no parts of this memory region are
driver's job to ensure that no parts of this memory region are
currently in use.
void *
@ -538,12 +537,10 @@ dma_mark_declared_memory_occupied(struct device *dev,
This is used to occupy specific regions of the declared space
(dma_alloc_coherent() will hand out the first free region it finds).
device_addr is the *device* address of the region requested
device_addr is the *device* address of the region requested.
size is the size (and should be a page sized multiple).
size is the size (and should be a page-sized multiple).
The return value will be either a pointer to the processor virtual
address of the memory, or an error (via PTR_ERR()) if any part of the
region is occupied.

19
Documentation/DocBook/kernel-api.tmpl
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@ -380,7 +380,6 @@ X!Edrivers/base/interface.c
!Edrivers/base/bus.c
</sect1>
<sect1><title>Device Drivers Power Management</title>
!Edrivers/base/power/main.c
!Edrivers/base/power/resume.c
!Edrivers/base/power/suspend.c
</sect1>
@ -398,12 +397,12 @@ X!Edrivers/acpi/pci_bind.c
-->
</sect1>
<sect1><title>Device drivers PnP support</title>
!Edrivers/pnp/core.c
!Idrivers/pnp/core.c
<!-- No correct structured comments
X!Edrivers/pnp/system.c
-->
!Edrivers/pnp/card.c
!Edrivers/pnp/driver.c
!Idrivers/pnp/driver.c
!Edrivers/pnp/manager.c
!Edrivers/pnp/support.c
</sect1>
@ -704,14 +703,22 @@ X!Idrivers/video/console/fonts.c
<chapter id="splice">
<title>splice API</title>
<para>)
<para>
splice is a method for moving blocks of data around inside the
kernel, without continually transferring it between the kernel
kernel, without continually transferring them between the kernel
and user space.
</para>
!Iinclude/linux/splice.h
!Ffs/splice.c
</chapter>
<chapter id="pipes">
<title>pipes API</title>
<para>
Pipe interfaces are all for in-kernel (builtin image) use.
They are not exported for use by modules.
</para>
!Iinclude/linux/pipe_fs_i.h
!Ffs/pipe.c
</chapter>
</book>

6
Documentation/block/barrier.txt
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@ -79,9 +79,9 @@ and how to prepare flush requests. Note that the term 'ordered' is
used to indicate the whole sequence of performing barrier requests
including draining and flushing.
typedef void (prepare_flush_fn)(request_queue_t *q, struct request *rq);
typedef void (prepare_flush_fn)(struct request_queue *q, struct request *rq);
int blk_queue_ordered(request_queue_t *q, unsigned ordered,
int blk_queue_ordered(struct request_queue *q, unsigned ordered,
prepare_flush_fn *prepare_flush_fn);
@q : the queue in question
@ -92,7 +92,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered,
For example, SCSI disk driver's prepare_flush_fn looks like the
following.
static void sd_prepare_flush(request_queue_t *q, struct request *rq)
static void sd_prepare_flush(struct request_queue *q, struct request *rq)
{
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd_type = REQ_TYPE_BLOCK_PC;

10
Documentation/block/biodoc.txt
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@ -740,12 +740,12 @@ Block now offers some simple generic functionality to help support command
queueing (typically known as tagged command queueing), ie manage more than
one outstanding command on a queue at any given time.
blk_queue_init_tags(request_queue_t *q, int depth)
blk_queue_init_tags(struct request_queue *q, int depth)
Initialize internal command tagging structures for a maximum
depth of 'depth'.
blk_queue_free_tags((request_queue_t *q)
blk_queue_free_tags((struct request_queue *q)
Teardown tag info associated with the queue. This will be done
automatically by block if blk_queue_cleanup() is called on a queue
@ -754,7 +754,7 @@ one outstanding command on a queue at any given time.
The above are initialization and exit management, the main helpers during
normal operations are:
blk_queue_start_tag(request_queue_t *q, struct request *rq)
blk_queue_start_tag(struct request_queue *q, struct request *rq)
Start tagged operation for this request. A free tag number between
0 and 'depth' is assigned to the request (rq->tag holds this number),
@ -762,7 +762,7 @@ normal operations are:
for this queue is already achieved (or if the tag wasn't started for
some other reason), 1 is returned. Otherwise 0 is returned.
blk_queue_end_tag(request_queue_t *q, struct request *rq)
blk_queue_end_tag(struct request_queue *q, struct request *rq)
End tagged operation on this request. 'rq' is removed from the internal
book keeping structures.
@ -781,7 +781,7 @@ queue. For instance, on IDE any tagged request error needs to clear both
the hardware and software block queue and enable the driver to sanely restart
all the outstanding requests. There's a third helper to do that:
blk_queue_invalidate_tags(request_queue_t *q)
blk_queue_invalidate_tags(struct request_queue *q)
Clear the internal block tag queue and re-add all the pending requests
to the request queue. The driver will receive them again on the

2
Documentation/block/request.txt
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@ -83,6 +83,6 @@ struct bio *bio DBI First bio in request
struct bio *biotail DBI Last bio in request
request_queue_t *q DB Request queue this request belongs to
struct request_queue *q DB Request queue this request belongs to
struct request_list *rl B Request list this request came from

3
Documentation/dontdiff
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@ -18,6 +18,7 @@
*.moc
*.mod.c
*.o
*.o.*
*.orig
*.out
*.pdf
@ -163,6 +164,8 @@ raid6tables.c
relocs
series
setup
setup.bin
setup.elf
sim710_d.h*
sImage
sm_tbl*

16
Documentation/feature-removal-schedule.txt
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@ -211,22 +211,6 @@ Who: Richard Purdie <rpurdie@rpsys.net>
---------------------------
What: read_dev_chars(), read_conf_data{,_lpm}() (s390 common I/O layer)
When: December 2007
Why: These functions are a leftover from 2.4 times. They have several
problems:
- Duplication of checks that are done in the device driver's
interrupt handler
- common I/O layer can't do device specific error recovery
- device driver can't be notified for conditions happening during
execution of the function
Device drivers should issue the read device characteristics and read
configuration data ccws and do the appropriate error handling
themselves.
Who: Cornelia Huck <cornelia.huck@de.ibm.com>
---------------------------
What: i2c-ixp2000, i2c-ixp4xx and scx200_i2c drivers
When: September 2007
Why: Obsolete. The new i2c-gpio driver replaces all hardware-specific

59
Documentation/filesystems/hfsplus.txt Normal file
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@ -0,0 +1,59 @@
Macintosh HFSPlus Filesystem for Linux
======================================
HFSPlus is a filesystem first introduced in MacOS 8.1.
HFSPlus has several extensions to HFS, including 32-bit allocation
blocks, 255-character unicode filenames, and file sizes of 2^63 bytes.
Mount options
=============
When mounting an HFSPlus filesystem, the following options are accepted:
creator=cccc, type=cccc
Specifies the creator/type values as shown by the MacOS finder
used for creating new files. Default values: '????'.
uid=n, gid=n
Specifies the user/group that owns all files on the filesystem
that have uninitialized permissions structures.
Default: user/group id of the mounting process.
umask=n
Specifies the umask (in octal) used for files and directories
that have uninitialized permissions structures.
Default: umask of the mounting process.
session=n
Select the CDROM session to mount as HFSPlus filesystem. Defaults to
leaving that decision to the CDROM driver. This option will fail
with anything but a CDROM as underlying devices.
part=n
Select partition number n from the devices. This option only makes
sense for CDROMs because they can't be partitioned under Linux.
For disk devices the generic partition parsing code does this
for us. Defaults to not parsing the partition table at all.
decompose
Decompose file name characters.
nodecompose
Do not decompose file name characters.
force
Used to force write access to volumes that are marked as journalled
or locked. Use at your own risk.
nls=cccc
Encoding to use when presenting file names.
References
==========
kernel source: <file:fs/hfsplus>
Apple Technote 1150 http://developer.apple.com/technotes/tn/tn1150.html

4
Documentation/gpio.txt
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@ -148,7 +148,7 @@ pin ... that won't always match the specified output value, because of
issues including wire-OR and output latencies.
The get/set calls have no error returns because "invalid GPIO" should have
been reported earlier in gpio_set_direction(). However, note that not all
been reported earlier from gpio_direction_*(). However, note that not all
platforms can read the value of output pins; those that can't should always
return zero. Also, using these calls for GPIOs that can't safely be accessed
without sleeping (see below) is an error.
@ -239,7 +239,7 @@ map between them using calls like:
Those return either the corresponding number in the other namespace, or
else a negative errno code if the mapping can't be done. (For example,
some GPIOs can't used as IRQs.) It is an unchecked error to use a GPIO
number that hasn't been marked as an input using gpio_set_direction(), or
number that wasn't set up as an input using gpio_direction_input(), or
to use an IRQ number that didn't originally come from gpio_to_irq().
These two mapping calls are expected to cost on the order of a single

2
Documentation/hpet.txt
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@ -5,7 +5,7 @@ for the 8254 and Real Time Clock (RTC) periodic timer functionality.
Each HPET can have up to 32 timers. It is possible to configure the
first two timers as legacy replacements for 8254 and RTC periodic timers.
A specification done by Intel and Microsoft can be found at
<http://www.intel.com/hardwaredesign/hpetspec.htm>.
<http://www.intel.com/technology/architecture/hpetspec.htm>.
The driver supports detection of HPET driver allocation and initialization
of the HPET before the driver module_init routine is called. This enables

4
Documentation/hwmon/adm1031
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@ -6,13 +6,13 @@ Supported chips:
Prefix: 'adm1030'
Addresses scanned: I2C 0x2c to 0x2e
Datasheet: Publicly available at the Analog Devices website
http://products.analog.com/products/info.asp?product=ADM1030
http://www.analog.com/en/prod/0%2C2877%2CADM1030%2C00.html
* Analog Devices ADM1031
Prefix: 'adm1031'
Addresses scanned: I2C 0x2c to 0x2e
Datasheet: Publicly available at the Analog Devices website
http://products.analog.com/products/info.asp?product=ADM1031
http://www.analog.com/en/prod/0%2C2877%2CADM1031%2C00.html
Authors:
Alexandre d'Alton <alex@alexdalton.org>

74
Documentation/hwmon/thmc50 Normal file
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@ -0,0 +1,74 @@
Kernel driver thmc50
=====================
Supported chips:
* Analog Devices ADM1022
Prefix: 'adm1022'
Addresses scanned: I2C 0x2c - 0x2e
Datasheet: http://www.analog.com/en/prod/0,2877,ADM1022,00.html
* Texas Instruments THMC50
Prefix: 'thmc50'
Addresses scanned: I2C 0x2c - 0x2e
Datasheet: http://focus.ti.com/docs/prod/folders/print/thmc50.html
Author: Krzysztof Helt <krzysztof.h1@wp.pl>
This driver was derived from the 2.4 kernel thmc50.c source file.
Credits:
thmc50.c (2.4 kernel):
Frodo Looijaard <frodol@dds.nl>
Philip Edelbrock <phil@netroedge.com>
Module Parameters
-----------------
* adm1022_temp3: short array
List of adapter,address pairs to force chips into ADM1022 mode with
second remote temperature. This does not work for original THMC50 chips.
Description
-----------
The THMC50 implements: an internal temperature sensor, support for an
external diode-type temperature sensor (compatible w/ the diode sensor inside
many processors), and a controllable fan/analog_out DAC. For the temperature
sensors, limits can be set through the appropriate Overtemperature Shutdown
register and Hysteresis register. Each value can be set and read to half-degree
accuracy. An alarm is issued (usually to a connected LM78) when the
temperature gets higher then the Overtemperature Shutdown value; it stays on
until the temperature falls below the Hysteresis value. All temperatures are in
degrees Celsius, and are guaranteed within a range of -55 to +125 degrees.
The THMC50 only updates its values each 1.5 seconds; reading it more often
will do no harm, but will return 'old' values.
The THMC50 is usually used in combination with LM78-like chips, to measure
the temperature of the processor(s).
The ADM1022 works the same as THMC50 but it is faster (5 Hz instead of
1 Hz for THMC50). It can be also put in a new mode to handle additional
remote temperature sensor. The driver use the mode set by BIOS by default.
In case the BIOS is broken and the mode is set incorrectly, you can force
the mode with additional remote temperature with adm1022_temp3 parameter.
A typical symptom of wrong setting is a fan forced to full speed.
Driver Features
---------------
The driver provides up to three temperatures:
temp1 -- internal
temp2 -- remote
temp3 -- 2nd remote only for ADM1022
pwm1 -- fan speed (0 = stop, 255 = full)
pwm1_mode -- always 0 (DC mode)
The value of 0 for pwm1 also forces FAN_OFF signal from the chip,
so it stops fans even if the value 0 into the ANALOG_OUT register does not.
The driver was tested on Compaq AP550 with two ADM1022 chips (one works
in the temp3 mode), five temperature readings and two fans.

2
Documentation/iostats.txt
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@ -79,7 +79,7 @@ Field 8 -- # of milliseconds spent writing
measured from __make_request() to end_that_request_last()).
Field 9 -- # of I/Os currently in progress
The only field that should go to zero. Incremented as requests are
given to appropriate request_queue_t and decremented as they finish.
given to appropriate struct request_queue and decremented as they finish.
Field 10 -- # of milliseconds spent doing I/Os
This field is increases so long as field 9 is nonzero.
Field 11 -- weighted # of milliseconds spent doing I/Os

62
Documentation/ja_JP/HOWTO
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@ -1,23 +1,24 @@
NOTE:
This is Japanese translated version of "Documentation/HOWTO".
This one is maintained by Tsugikazu Shibata <tshibata@ab.jp.nec.com>
and JF Project team <www.linux.or.jp/JF>.
If you find difference with original file or problem in translation,
please contact maintainer of this file or JF project.
NOTE:
This is a version of Documentation/HOWTO translated into Japanese.
This document is maintained by Tsugikazu Shibata <tshibata@ab.jp.nec.com>
and the JF Project team <www.linux.or.jp/JF>.
If you find any difference between this document and the original file
or a problem with the translation,
please contact the maintainer of this file or JF project.
Please also note that purpose of this file is easier to read for non
English natives and not to be intended to fork. So, if you have any
comments or updates of this file, please try to update Original(English)
file at first.
Please also note that the purpose of this file is to be easier to read
for non English (read: Japanese) speakers and is not intended as a
fork. So if you have any comments or updates for this file, please try
to update the original English file first.
Last Updated: 2007/06/04
Last Updated: 2007/07/18
==================================
これは、
linux-2.6.21/Documentation/HOWTO
linux-2.6.22/Documentation/HOWTO
の和訳です。
翻訳団体： JF プロジェクト < http://www.linux.or.jp/JF/ >
翻訳日： 2007/06/04
翻訳日： 2007/07/16
翻訳者： Tsugikazu Shibata <tshibata at ab dot jp dot nec dot com>
校正者： 松倉さん <nbh--mats at nifty dot com>
小林 雅典さん (Masanori Kobayasi) <zap03216 at nifty dot ne dot jp>
@ -52,6 +53,7 @@ Linux カーネル開発コミュニティと共に活動するやり方を学
また、このコミュニティがなぜ今うまくまわっているのかという理由の一部も
説明しようと試みています。
カーネルは 少量のアーキテクチャ依存部分がアセンブリ言語で書かれている
以外は大部分は C 言語で書かれています。C言語をよく理解していることはカー
ネル開発者には必要です。アーキテクチャ向けの低レベル部分の開発をするの
@ -141,6 +143,7 @@ Linux カーネルソースツリーは幅広い範囲のドキュメントを
これらのルールに従えばうまくいくことを保証することではありません
が (すべてのパッチは内容とスタイルについて精査を受けるので)、
ルールに従わなければ間違いなくうまくいかないでしょう。
この他にパッチを作る方法についてのよくできた記述は-
"The Perfect Patch"
@ -360,44 +363,42 @@ linux-kernel メーリングリストで収集された多数のパッチと同
git ツリー-
- Kbuild の開発ツリー、Sam Ravnborg <sam@ravnborg.org>
kernel.org:/pub/scm/linux/kernel/git/sam/kbuild.git
git.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild.git
- ACPI の開発ツリー、 Len Brown <len.brown@intel.com>
kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
git.kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
- Block の開発ツリー、Jens Axboe <axboe@suse.de>
kernel.org:/pub/scm/linux/kernel/git/axboe/linux-2.6-block.git
git.kernel.org:/pub/scm/linux/kernel/git/axboe/linux-2.6-block.git
- DRM の開発ツリー、Dave Airlie <airlied@linux.ie>
kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6.git
git.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6.git
- ia64 の開発ツリー、Tony Luck <tony.luck@intel.com>
kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6.git
- ieee1394 の開発ツリー、Jody McIntyre <scjody@modernduck.com>
kernel.org:/pub/scm/linux/kernel/git/scjody/ieee1394.git
git.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6.git
- infiniband, Roland Dreier <rolandd@cisco.com>
kernel.org:/pub/scm/linux/kernel/git/roland/infiniband.git
git.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband.git
- libata, Jeff Garzik <jgarzik@pobox.com>
kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git
git.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git
- ネットワークドライバ, Jeff Garzik <jgarzik@pobox.com>
kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6.git
git.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6.git
- pcmcia, Dominik Brodowski <linux@dominikbrodowski.net>
kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6.git
git.kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6.git
- SCSI, James Bottomley <James.Bottomley@SteelEye.com>
kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6.git
その他の git カーネルツリーは http://kernel.org/git に一覧表がありま
す。
git.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6.git
quilt ツリー-
- USB, PCI ドライバコアと I2C, Greg Kroah-Hartman <gregkh@suse.de>
kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/
- x86-64 と i386 の仲間 Andi Kleen <ak@suse.de>
その他のカーネルツリーは http://git.kernel.org/ と MAINTAINERS ファ
イルに一覧表があります。
バグレポート
-------------
@ -508,6 +509,7 @@ MAINTAINERS ファイルにリストがありますので参照してくださ
せん*。単に自分のパッチに対して指摘された問題を全て修正して再送すれば
いいのです。
カーネルコミュニティと企業組織のちがい
-----------------------------------------------------------------
@ -577,6 +579,7 @@ Linux カーネルコミュニティは、一度に大量のコードの塊を
かし、500行のパッチは、正しいことをレビューするのに数時間かかるかも
しれません(時間はパッチのサイズなどにより指数関数に比例してかかりま
す)
小さいパッチは何かあったときにデバッグもとても簡単になります。パッ
チを1個1個取り除くのは、とても大きなパッチを当てた後に(かつ、何かお
かしくなった後で)解剖するのに比べればとても簡単です。
@ -591,6 +594,7 @@ Linux カーネルコミュニティは、一度に大量のコードの塊を
う。先生は簡潔な最高の解をみたいのです。良い生徒はこれを知って
おり、そして最終解の前の中間作業を提出することは決してないので
す"
カーネル開発でもこれは同じです。メンテナー達とレビューア達は、
問題を解決する解の背後になる思考プロセスをみたいとは思いません。
彼らは単純であざやかな解決方法をみたいのです。

20
Documentation/ja_JP/stable_api_nonsense.txt
View File

@ -1,17 +1,17 @@
NOTE:
This is a Japanese translated version of
"Documentation/stable_api_nonsense.txt".
This one is maintained by
IKEDA, Munehiro <m-ikeda@ds.jp.nec.com>
and JF Project team <http://www.linux.or.jp/JF/>.
If you find difference with original file or problem in translation,
This is a version of Documentation/stable_api_nonsense.txt into Japanese.
This document is maintained by IKEDA, Munehiro <m-ikeda@ds.jp.nec.com>
and the JF Project team <http://www.linux.or.jp/JF/>.
If you find any difference between this document and the original file
or a problem with the translation,
please contact the maintainer of this file or JF project.
Please also note that purpose of this file is easier to read for non
English natives and not to be intended to fork. So, if you have any
comments or updates of this file, please try to update
Original(English) file at first.
Please also note that the purpose of this file is to be easier to read
for non English (read: Japanese) speakers and is not intended as a
fork. So if you have any comments or updates of this file, please try
to update the original English file first.
Last Updated: 2007/07/18
==================================
これは、
linux-2.6.22-rc4/Documentation/stable_api_nonsense.txt の和訳

145
Documentation/kernel-parameters.txt
View File

@ -30,6 +30,7 @@ the beginning of each description states the restrictions within which a
parameter is applicable:
ACPI ACPI support is enabled.
AGP AGP (Accelerated Graphics Port) is enabled.
ALSA ALSA sound support is enabled.
APIC APIC support is enabled.
APM Advanced Power Management support is enabled.
@ -40,7 +41,6 @@ parameter is applicable:
EIDE EIDE/ATAPI support is enabled.
FB The frame buffer device is enabled.
HW Appropriate hardware is enabled.
IA-32 IA-32 aka i386 architecture is enabled.
IA-64 IA-64 architecture is enabled.
IOSCHED More than one I/O scheduler is enabled.
IP_PNP IP DHCP, BOOTP, or RARP is enabled.
@ -57,14 +57,14 @@ parameter is applicable:
MDA MDA console support is enabled.
MOUSE Appropriate mouse support is enabled.
MSI Message Signaled Interrupts (PCI).
MTD MTD support is enabled.
MTD MTD (Memory Technology Device) support is enabled.
NET Appropriate network support is enabled.
NUMA NUMA support is enabled.
GENERIC_TIME The generic timeofday code is enabled.
NFS Appropriate NFS support is enabled.
OSS OSS sound support is enabled.
PV_OPS A paravirtualized kernel
PARIDE The ParIDE subsystem is enabled.
PV_OPS A paravirtualized kernel is enabled.
PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
PARISC The PA-RISC architecture is enabled.
PCI PCI bus support is enabled.
PCMCIA The PCMCIA subsystem is enabled.
@ -91,6 +91,7 @@ parameter is applicable:
VT Virtual terminal support is enabled.
WDT Watchdog support is enabled.
XT IBM PC/XT MFM hard disk support is enabled.
X86-32 X86-32, aka i386 architecture is enabled.
X86-64 X86-64 architecture is enabled.
More X86-64 boot options can be found in
Documentation/x86_64/boot-options.txt .
@ -122,10 +123,6 @@ and is between 256 and 4096 characters. It is defined in the file
./include/asm/setup.h as COMMAND_LINE_SIZE.
53c7xx= [HW,SCSI] Amiga SCSI controllers
See header of drivers/scsi/53c7xx.c.
See also Documentation/scsi/ncr53c7xx.txt.
acpi= [HW,ACPI,X86-64,i386]
Advanced Configuration and Power Interface
Format: { force | off | ht | strict | noirq }
@ -222,11 +219,17 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_fake_ecdt [HW,ACPI] Workaround failure due to BIOS lacking ECDT
acpi_pm_good [IA-32,X86-64]
acpi_pm_good [X86-32,X86-64]
Override the pmtimer bug detection: force the kernel
to assume that this machine's pmtimer latches its value
and always returns good values.
agp= [AGP]
{ off | try_unsupported }
off: disable AGP support
try_unsupported: try to drive unsupported chipsets
(may crash computer or cause data corruption)
enable_timer_pin_1 [i386,x86-64]
Enable PIN 1 of APIC timer
Can be useful to work around chipset bugs
@ -279,7 +282,8 @@ and is between 256 and 4096 characters. It is defined in the file
not play well with APC CPU idle - disable it if you have
APC and your system crashes randomly.
apic= [APIC,i386] Change the output verbosity whilst booting
apic= [APIC,i386] Advanced Programmable Interrupt Controller
Change the output verbosity whilst booting
Format: { quiet (default) | verbose | debug }
Change the amount of debugging information output
when initialising the APIC and IO-APIC components.
@ -353,7 +357,7 @@ and is between 256 and 4096 characters. It is defined in the file
c101= [NET] Moxa C101 synchronous serial card
cachesize= [BUGS=IA-32] Override level 2 CPU cache size detection.
cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
Sometimes CPU hardware bugs make them report the cache
size incorrectly. The kernel will attempt work arounds
to fix known problems, but for some CPUs it is not
@ -372,7 +376,7 @@ and is between 256 and 4096 characters. It is defined in the file
Value can be changed at runtime via
/selinux/checkreqprot.
clock= [BUGS=IA-32, HW] gettimeofday clocksource override.
clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
[Deprecated]
Forces specified clocksource (if available) to be used
when calculating gettimeofday(). If specified
@ -390,7 +394,7 @@ and is between 256 and 4096 characters. It is defined in the file
[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
pxa_timer,timer3,32k_counter,timer0_1
[AVR32] avr32
[IA-32] pit,hpet,tsc,vmi-timer;
[X86-32] pit,hpet,tsc,vmi-timer;
scx200_hrt on Geode; cyclone on IBM x440
[MIPS] MIPS
[PARISC] cr16
@ -410,7 +414,7 @@ and is between 256 and 4096 characters. It is defined in the file
over the 8254 in addition to over the IO-APIC. The
kernel tries to set a sensible default.
hpet= [IA-32,HPET] option to disable HPET and use PIT.
hpet= [X86-32,HPET] option to disable HPET and use PIT.
Format: disable
com20020= [HW,NET] ARCnet - COM20020 chipset
@ -547,7 +551,7 @@ and is between 256 and 4096 characters. It is defined in the file
dtc3181e= [HW,SCSI]
earlyprintk= [IA-32,X86-64,SH]
earlyprintk= [X86-32,X86-64,SH]
earlyprintk=vga
earlyprintk=serial[,ttySn[,baudrate]]
@ -585,7 +589,7 @@ and is between 256 and 4096 characters. It is defined in the file
eisa_irq_edge= [PARISC,HW]
See header of drivers/parisc/eisa.c.
elanfreq= [IA-32]
elanfreq= [X86-32]
See comment before function elanfreq_setup() in
arch/i386/kernel/cpu/cpufreq/elanfreq.c.
@ -594,7 +598,7 @@ and is between 256 and 4096 characters. It is defined in the file
See Documentation/block/as-iosched.txt and
Documentation/block/deadline-iosched.txt for details.
elfcorehdr= [IA-32, X86_64]
elfcorehdr= [X86-32, X86_64]
Specifies physical address of start of kernel core
image elf header. Generally kexec loader will
pass this option to capture kernel.
@ -676,7 +680,7 @@ and is between 256 and 4096 characters. It is defined in the file
hisax= [HW,ISDN]
See Documentation/isdn/README.HiSax.
hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages.
hugepages= [HW,X86-32,IA-64] Maximal number of HugeTLB pages.
i8042.direct [HW] Put keyboard port into non-translated mode
i8042.dumbkbd [HW] Pretend that controller can only read data from
@ -768,7 +772,8 @@ and is between 256 and 4096 characters. It is defined in the file
See Documentation/nfsroot.txt.
ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
See comment before ip2_setup() in drivers/char/ip2.c.
See comment before ip2_setup() in
drivers/char/ip2/ip2base.c.
ips= [HW,SCSI] Adaptec / IBM ServeRAID controller
See header of drivers/scsi/ips.c.
@ -817,7 +822,7 @@ and is between 256 and 4096 characters. It is defined in the file
js= [HW,JOY] Analog joystick
See Documentation/input/joystick.txt.
kernelcore=nn[KMG] [KNL,IA-32,IA-64,PPC,X86-64] This parameter
kernelcore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
specifies the amount of memory usable by the kernel
for non-movable allocations. The requested amount is
spread evenly throughout all nodes in the system. The
@ -833,7 +838,7 @@ and is between 256 and 4096 characters. It is defined in the file
use the HighMem zone if it exists, and the Normal
zone if it does not.
movablecore=nn[KMG] [KNL,IA-32,IA-64,PPC,X86-64] This parameter
movablecore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
is similar to kernelcore except it specifies the
amount of memory used for migratable allocations.
If both kernelcore and movablecore is specified,
@ -845,28 +850,20 @@ and is between 256 and 4096 characters. It is defined in the file
keepinitrd [HW,ARM]
kstack=N [IA-32,X86-64] Print N words from the kernel stack
kstack=N [X86-32,X86-64] Print N words from the kernel stack
in oops dumps.
l2cr= [PPC]
lapic [IA-32,APIC] Enable the local APIC even if BIOS
lapic [X86-32,APIC] Enable the local APIC even if BIOS
disabled it.
lapic_timer_c2_ok [IA-32,x86-64,APIC] trust the local apic timer in
lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in
C2 power state.
lasi= [HW,SCSI] PARISC LASI driver for the 53c700 chip
Format: addr:<io>,irq:<irq>
legacy_serial.force [HW,IA-32,X86-64]
Probe for COM ports at legacy addresses even
if PNPBIOS or ACPI should describe them. This
is for working around firmware defects.
llsc*= [IA64] See function print_params() in
arch/ia64/sn/kernel/llsc4.c.
load_ramdisk= [RAM] List of ramdisks to load from floppy
See Documentation/ramdisk.txt.
@ -972,11 +969,11 @@ and is between 256 and 4096 characters. It is defined in the file
[SCSI] Maximum number of LUNs received.
Should be between 1 and 16384.
mca-pentium [BUGS=IA-32]
mca-pentium [BUGS=X86-32]
mcatest= [IA-64]
mce [IA-32] Machine Check Exception
mce [X86-32] Machine Check Exception
md= [HW] RAID subsystems devices and level
See Documentation/md.txt.
@ -988,14 +985,14 @@ and is between 256 and 4096 characters. It is defined in the file
mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
Amount of memory to be used when the kernel is not able
to see the whole system memory or for test.
[IA-32] Use together with memmap= to avoid physical
[X86-32] Use together with memmap= to avoid physical
address space collisions. Without memmap= PCI devices
could be placed at addresses belonging to unused RAM.
mem=nopentium [BUGS=IA-32] Disable usage of 4MB pages for kernel
mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
memory.
memmap=exactmap [KNL,IA-32,X86_64] Enable setting of an exact
memmap=exactmap [KNL,X86-32,X86_64] Enable setting of an exact
E820 memory map, as specified by the user.
Such memmap=exactmap lines can be constructed based on
BIOS output or other requirements. See the memmap=nn@ss
@ -1039,7 +1036,7 @@ and is between 256 and 4096 characters. It is defined in the file
<name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
mtdparts= [MTD]
See drivers/mtd/cmdline.c.
See drivers/mtd/cmdlinepart.c.
mtouchusb.raw_coordinates=
[HW] Make the MicroTouch USB driver use raw coordinates
@ -1081,9 +1078,9 @@ and is between 256 and 4096 characters. It is defined in the file
[NFS] set the maximum lifetime for idmapper cache
entries.
nmi_watchdog= [KNL,BUGS=IA-32] Debugging features for SMP kernels
nmi_watchdog= [KNL,BUGS=X86-32] Debugging features for SMP kernels
no387 [BUGS=IA-32] Tells the kernel to use the 387 maths
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
emulation library even if a 387 maths coprocessor
is present.
@ -1114,17 +1111,17 @@ and is between 256 and 4096 characters. It is defined in the file
noexec [IA-64]
noexec [IA-32,X86-64]
noexec [X86-32,X86-64]
noexec=on: enable non-executable mappings (default)
noexec=off: disable nn-executable mappings
nofxsr [BUGS=IA-32] Disables x86 floating point extended
nofxsr [BUGS=X86-32] Disables x86 floating point extended
register save and restore. The kernel will only save
legacy floating-point registers on task switch.
nohlt [BUGS=ARM]
no-hlt [BUGS=IA-32] Tells the kernel that the hlt
no-hlt [BUGS=X86-32] Tells the kernel that the hlt
instruction doesn't work correctly and not to
use it.
@ -1139,12 +1136,12 @@ and is between 256 and 4096 characters. It is defined in the file
Valid arguments: on, off
Default: on
noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
noirqbalance [X86-32,SMP,KNL] Disable kernel irq balancing
noirqdebug [IA-32] Disables the code which attempts to detect and
noirqdebug [X86-32] Disables the code which attempts to detect and
disable unhandled interrupt sources.
no_timer_check [IA-32,X86_64,APIC] Disables the code which tests for
no_timer_check [X86-32,X86_64,APIC] Disables the code which tests for
broken timer IRQ sources.
noisapnp [ISAPNP] Disables ISA PnP code.
@ -1156,20 +1153,20 @@ and is between 256 and 4096 characters. It is defined in the file
nojitter [IA64] Disables jitter checking for ITC timers.
nolapic [IA-32,APIC] Do not enable or use the local APIC.
nolapic [X86-32,APIC] Do not enable or use the local APIC.
nolapic_timer [IA-32,APIC] Do not use the local APIC timer.
nolapic_timer [X86-32,APIC] Do not use the local APIC timer.
noltlbs [PPC] Do not use large page/tlb entries for kernel
lowmem mapping on PPC40x.
nomca [IA-64] Disable machine check abort handling
nomce [IA-32] Machine Check Exception
nomce [X86-32] Machine Check Exception
noreplace-paravirt [IA-32,PV_OPS] Don't patch paravirt_ops
noreplace-paravirt [X86-32,PV_OPS] Don't patch paravirt_ops
noreplace-smp [IA-32,SMP] Don't replace SMP instructions
noreplace-smp [X86-32,SMP] Don't replace SMP instructions
with UP alternatives
noresidual [PPC] Don't use residual data on PReP machines.
@ -1183,7 +1180,7 @@ and is between 256 and 4096 characters. It is defined in the file
nosbagart [IA-64]
nosep [BUGS=IA-32] Disables x86 SYSENTER/SYSEXIT support.
nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
nosmp [SMP] Tells an SMP kernel to act as a UP kernel.
@ -1191,7 +1188,7 @@ and is between 256 and 4096 characters. It is defined in the file
nosync [HW,M68K] Disables sync negotiation for all devices.
notsc [BUGS=IA-32] Disable Time Stamp Counter
notsc [BUGS=X86-32] Disable Time Stamp Counter
nousb [USB] Disable the USB subsystem
@ -1264,28 +1261,28 @@ and is between 256 and 4096 characters. It is defined in the file
See also Documentation/paride.txt.
pci=option[,option...] [PCI] various PCI subsystem options:
off [IA-32] don't probe for the PCI bus
bios [IA-32] force use of PCI BIOS, don't access
off [X86-32] don't probe for the PCI bus
bios [X86-32] force use of PCI BIOS, don't access
the hardware directly. Use this if your machine
has a non-standard PCI host bridge.
nobios [IA-32] disallow use of PCI BIOS, only direct
nobios [X86-32] disallow use of PCI BIOS, only direct
hardware access methods are allowed. Use this
if you experience crashes upon bootup and you
suspect they are caused by the BIOS.
conf1 [IA-32] Force use of PCI Configuration
conf1 [X86-32] Force use of PCI Configuration
Mechanism 1.
conf2 [IA-32] Force use of PCI Configuration
conf2 [X86-32] Force use of PCI Configuration
Mechanism 2.
nommconf [IA-32,X86_64] Disable use of MMCONFIG for PCI
nommconf [X86-32,X86_64] Disable use of MMCONFIG for PCI
Configuration
nomsi [MSI] If the PCI_MSI kernel config parameter is
enabled, this kernel boot option can be used to
disable the use of MSI interrupts system-wide.
nosort [IA-32] Don't sort PCI devices according to
nosort [X86-32] Don't sort PCI devices according to
order given by the PCI BIOS. This sorting is
done to get a device order compatible with
older kernels.
biosirq [IA-32] Use PCI BIOS calls to get the interrupt
biosirq [X86-32] Use PCI BIOS calls to get the interrupt
routing table. These calls are known to be buggy
on several machines and they hang the machine
when used, but on other computers it's the only
@ -1293,32 +1290,32 @@ and is between 256 and 4096 characters. It is defined in the file
this option if the kernel is unable to allocate
IRQs or discover secondary PCI buses on your
motherboard.
rom [IA-32] Assign address space to expansion ROMs.
rom [X86-32] Assign address space to expansion ROMs.
Use with caution as certain devices share
address decoders between ROMs and other
resources.
irqmask=0xMMMM [IA-32] Set a bit mask of IRQs allowed to be
irqmask=0xMMMM [X86-32] Set a bit mask of IRQs allowed to be
assigned automatically to PCI devices. You can
make the kernel exclude IRQs of your ISA cards
this way.
pirqaddr=0xAAAAA [IA-32] Specify the physical address
pirqaddr=0xAAAAA [X86-32] Specify the physical address
of the PIRQ table (normally generated
by the BIOS) if it is outside the
F0000h-100000h range.
lastbus=N [IA-32] Scan all buses thru bus #N. Can be
lastbus=N [X86-32] Scan all buses thru bus #N. Can be
useful if the kernel is unable to find your
secondary buses and you want to tell it
explicitly which ones they are.
assign-busses [IA-32] Always assign all PCI bus
assign-busses [X86-32] Always assign all PCI bus
numbers ourselves, overriding
whatever the firmware may have done.
usepirqmask [IA-32] Honor the possible IRQ mask stored
usepirqmask [X86-32] Honor the possible IRQ mask stored
in the BIOS $PIR table. This is needed on
some systems with broken BIOSes, notably
some HP Pavilion N5400 and Omnibook XE3
notebooks. This will have no effect if ACPI
IRQ routing is enabled.
noacpi [IA-32] Do not use ACPI for IRQ routing
noacpi [X86-32] Do not use ACPI for IRQ routing
or for PCI scanning.
routeirq Do IRQ routing for all PCI devices.
This is normally done in pci_enable_device(),
@ -1467,13 +1464,13 @@ and is between 256 and 4096 characters. It is defined in the file
Run specified binary instead of /init from the ramdisk,
used for early userspace startup. See initrd.
reboot= [BUGS=IA-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
reboot= [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
Format: <reboot_mode>[,<reboot_mode2>[,...]]
See arch/*/kernel/reboot.c or arch/*/kernel/process.c
reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
reservetop= [IA-32]
reservetop= [X86-32]
Format: nn[KMG]
Reserves a hole at the top of the kernel virtual
address space.
@ -1564,7 +1561,7 @@ and is between 256 and 4096 characters. It is defined in the file
Value can be changed at runtime via
/selinux/compat_net.
serialnumber [BUGS=IA-32]
serialnumber [BUGS=X86-32]
sg_def_reserved_size= [SCSI]
@ -1617,7 +1614,7 @@ and is between 256 and 4096 characters. It is defined in the file
smart2= [HW]
Format: <io1>[,<io2>[,...,<io8>]]
smp-alt-once [IA-32,SMP] On a hotplug CPU system, only
smp-alt-once [X86-32,SMP] On a hotplug CPU system, only
attempt to substitute SMP alternatives once at boot.
smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
@ -1882,7 +1879,7 @@ and is between 256 and 4096 characters. It is defined in the file
usbhid.mousepoll=
[USBHID] The interval which mice are to be polled at.
vdso= [IA-32,SH,x86-64]
vdso= [X86-32,SH,x86-64]
vdso=2: enable compat VDSO (default with COMPAT_VDSO)
vdso=1: enable VDSO (default)
vdso=0: disable VDSO mapping
@ -1893,7 +1890,7 @@ and is between 256 and 4096 characters. It is defined in the file
video= [FB] Frame buffer configuration
See Documentation/fb/modedb.txt.
vga= [BOOT,IA-32] Select a particular video mode
vga= [BOOT,X86-32] Select a particular video mode
See Documentation/i386/boot.txt and
Documentation/svga.txt.
Use vga=ask for menu.

5
Documentation/keys.txt
View File

@ -859,9 +859,8 @@ payload contents" for more information.
void unregister_key_type(struct key_type *type);
Under some circumstances, it may be desirable to desirable to deal with a
bundle of keys. The facility provides access to the keyring type for managing
such a bundle:
Under some circumstances, it may be desirable to deal with a bundle of keys.
The facility provides access to the keyring type for managing such a bundle:
struct key_type key_type_keyring;

178
Documentation/kobject.txt
View File

@ -27,7 +27,6 @@ in detail, and briefly here:
- kobjects a simple object.
- kset a set of objects of a certain type.
- ktype a set of helpers for objects of a common type.
- subsystem a controlling object for a number of ksets.
The kobject infrastructure maintains a close relationship with the
@ -54,13 +53,15 @@ embedded in larger data structures and replace fields they duplicate.
1.2 Definition
struct kobject {
const char * k_name;
char name[KOBJ_NAME_LEN];
atomic_t refcount;
struct kref kref;
struct list_head entry;
struct kobject * parent;
struct kset * kset;
struct kobj_type * ktype;
struct dentry * dentry;
struct sysfs_dirent * sd;
wait_queue_head_t poll;
};
void kobject_init(struct kobject *);
@ -137,8 +138,7 @@ If a kobject does not have a parent when it is registered, its parent
becomes its dominant kset.
If a kobject does not have a parent nor a dominant kset, its directory
is created at the top-level of the sysfs partition. This should only
happen for kobjects that are embedded in a struct subsystem.
is created at the top-level of the sysfs partition.
@ -150,10 +150,10 @@ A kset is a set of kobjects that are embedded in the same type.
struct kset {
struct subsystem * subsys;
struct kobj_type * ktype;
struct list_head list;
struct kobject kobj;
struct kset_uevent_ops * uevent_ops;
};
@ -169,8 +169,7 @@ struct kobject * kset_find_obj(struct kset *, char *);
The type that the kobjects are embedded in is described by the ktype
pointer. The subsystem that the kobject belongs to is pointed to by the
subsys pointer.
pointer.
A kset contains a kobject itself, meaning that it may be registered in
the kobject hierarchy and exported via sysfs. More importantly, the
@ -209,6 +208,58 @@ the hierarchy.
kset_find_obj() may be used to locate a kobject with a particular
name. The kobject, if found, is returned.
There are also some helper functions which names point to the formerly
existing "struct subsystem", whose functions have been taken over by
ksets.
decl_subsys(name,type,uevent_ops)
Declares a kset named '<name>_subsys' of type <type> with
uevent_ops <uevent_ops>. For example,
decl_subsys(devices, &ktype_device, &device_uevent_ops);
is equivalent to doing:
struct kset devices_subsys = {
.kobj = {
.name = "devices",
},
.ktype = &ktype_devices,
.uevent_ops = &device_uevent_ops,
};
The objects that are registered with a subsystem that use the
subsystem's default list must have their kset ptr set properly. These
objects may have embedded kobjects or ksets. The
following helpers make setting the kset easier:
kobj_set_kset_s(obj,subsys)
- Assumes that obj->kobj exists, and is a struct kobject.
- Sets the kset of that kobject to the kset <subsys>.
kset_set_kset_s(obj,subsys)
- Assumes that obj->kset exists, and is a struct kset.
- Sets the kset of the embedded kobject to the kset <subsys>.
subsys_set_kset(obj,subsys)
- Assumes obj->subsys exists, and is a struct subsystem.
- Sets obj->subsys.kset.kobj.kset to the subsystem's embedded kset.
void subsystem_init(struct kset *s);
int subsystem_register(struct kset *s);
void subsystem_unregister(struct kset *s);
struct kset *subsys_get(struct kset *s);
void kset_put(struct kset *s);
These are just wrappers around the respective kset_* functions.
2.3 sysfs
@ -254,114 +305,3 @@ Instances of struct kobj_type are not registered; only referenced by
the kset. A kobj_type may be referenced by an arbitrary number of
ksets, as there may be disparate sets of identical objects.
4. subsystems
4.1 Description
A subsystem represents a significant entity of code that maintains an
arbitrary number of sets of objects of various types. Since the number
of ksets and the type of objects they contain are variable, a
generic representation of a subsystem is minimal.
struct subsystem {
struct kset kset;
struct rw_semaphore rwsem;
};
int subsystem_register(struct subsystem *);
void subsystem_unregister(struct subsystem *);
struct subsystem * subsys_get(struct subsystem * s);
void subsys_put(struct subsystem * s);
A subsystem contains an embedded kset so:
- It can be represented in the object hierarchy via the kset's
embedded kobject.
- It can maintain a default list of objects of one type.
Additional ksets may attach to the subsystem simply by referencing the
subsystem before they are registered. (This one-way reference means
that there is no way to determine the ksets that are attached to the
subsystem.)
All ksets that are attached to a subsystem share the subsystem's R/W
semaphore.
4.2 subsystem Programming Interface.
The subsystem programming interface is simple and does not offer the
flexibility that the kset and kobject programming interfaces do. They
may be registered and unregistered, as well as reference counted. Each
call forwards the calls to their embedded ksets (which forward the
calls to their embedded kobjects).
4.3 Helpers
A number of macros are available to make dealing with subsystems and
their embedded objects easier.
decl_subsys(name,type)
Declares a subsystem named '<name>_subsys', with an embedded kset of
type <type>. For example,
decl_subsys(devices,&ktype_devices);
is equivalent to doing:
struct subsystem device_subsys = {
.kset = {
.kobj = {
.name = "devices",
},
.ktype = &ktype_devices,
}
};
The objects that are registered with a subsystem that use the
subsystem's default list must have their kset ptr set properly. These
objects may have embedded kobjects, ksets, or other subsystems. The
following helpers make setting the kset easier:
kobj_set_kset_s(obj,subsys)
- Assumes that obj->kobj exists, and is a struct kobject.
- Sets the kset of that kobject to the subsystem's embedded kset.
kset_set_kset_s(obj,subsys)
- Assumes that obj->kset exists, and is a struct kset.
- Sets the kset of the embedded kobject to the subsystem's
embedded kset.
subsys_set_kset(obj,subsys)
- Assumes obj->subsys exists, and is a struct subsystem.
- Sets obj->subsys.kset.kobj.kset to the subsystem's embedded kset.
4.4 sysfs
subsystems are represented in sysfs via their embedded kobjects. They
follow the same rules as previously mentioned with no exceptions. They
typically receive a top-level directory in sysfs, except when their
embedded kobject is part of another kset, or the parent of the
embedded kobject is explicitly set.
Note that the subsystem's embedded kset must be 'attached' to the
subsystem itself in order to use its rwsem. This is done after
kset_add() has been called. (Not before, because kset_add() uses its
subsystem for a default parent if it doesn't already have one).

3
Documentation/lguest/Makefile
View File

@ -11,8 +11,7 @@ endif
include $(KBUILD_OUTPUT)/.config
LGUEST_GUEST_TOP := ($(CONFIG_PAGE_OFFSET) - 0x08000000)
CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 \
-static -DLGUEST_GUEST_TOP="$(LGUEST_GUEST_TOP)" -Wl,-T,lguest.lds
CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 -Wl,-T,lguest.lds
LDLIBS:=-lz
all: lguest.lds lguest

58
Documentation/lguest/extract Normal file
View File

@ -0,0 +1,58 @@
#! /bin/sh
set -e
PREFIX=$1
shift
trap 'rm -r $TMPDIR' 0
TMPDIR=`mktemp -d`
exec 3>/dev/null
for f; do
while IFS="
" read -r LINE; do
case "$LINE" in
*$PREFIX:[0-9]*:\**)
NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"`
if [ -f $TMPDIR/$NUM ]; then
echo "$TMPDIR/$NUM already exits prior to $f"
exit 1
fi
exec 3>>$TMPDIR/$NUM
echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM
/bin/echo "$LINE" | sed -e "s/$PREFIX:[0-9]*//" -e "s/:\*/*/" >&3
;;
*$PREFIX:[0-9]*)
NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"`
if [ -f $TMPDIR/$NUM ]; then
echo "$TMPDIR/$NUM already exits prior to $f"
exit 1
fi
exec 3>>$TMPDIR/$NUM
echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM
/bin/echo "$LINE" | sed "s/$PREFIX:[0-9]*//" >&3
;;
*:\**)
/bin/echo "$LINE" | sed -e "s/:\*/*/" -e "s,/\*\*/,," >&3
echo >&3
exec 3>/dev/null
;;
*)
/bin/echo "$LINE" >&3
;;
esac
done < $f
echo >&3
exec 3>/dev/null
done
LASTFILE=""
for f in $TMPDIR/*; do
if [ "$LASTFILE" != $(cat $TMPDIR/.$(basename $f) ) ]; then
LASTFILE=$(cat $TMPDIR/.$(basename $f) )
echo "[ $LASTFILE ]"
fi
cat $f
done

708
Documentation/lguest/lguest.c
View File

File diff suppressed because it is too large Load Diff

185
Documentation/sched-stats.txt
View File

@ -1,10 +1,11 @@
Version 10 of schedstats includes support for sched_domains, which
hit the mainline kernel in 2.6.7. Some counters make more sense to be
per-runqueue; other to be per-domain. Note that domains (and their associated
information) will only be pertinent and available on machines utilizing
CONFIG_SMP.
Version 14 of schedstats includes support for sched_domains, which hit the
mainline kernel in 2.6.20 although it is identical to the stats from version
12 which was in the kernel from 2.6.13-2.6.19 (version 13 never saw a kernel
release). Some counters make more sense to be per-runqueue; other to be
per-domain. Note that domains (and their associated information) will only
be pertinent and available on machines utilizing CONFIG_SMP.
In version 10 of schedstat, there is at least one level of domain
In version 14 of schedstat, there is at least one level of domain
statistics for each cpu listed, and there may well be more than one
domain. Domains have no particular names in this implementation, but
the highest numbered one typically arbitrates balancing across all the
@ -27,7 +28,7 @@ to write their own scripts, the fields are described here.
CPU statistics
--------------
cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12
NOTE: In the sched_yield() statistics, the active queue is considered empty
if it has only one process in it, since obviously the process calling
@ -39,48 +40,20 @@ First four fields are sched_yield() statistics:
3) # of times just the expired queue was empty
4) # of times sched_yield() was called
Next four are schedule() statistics:
5) # of times the active queue had at least one other process on it
6) # of times we switched to the expired queue and reused it
7) # of times schedule() was called
8) # of times schedule() left the processor idle
Next three are schedule() statistics:
5) # of times we switched to the expired queue and reused it
6) # of times schedule() was called
7) # of times schedule() left the processor idle
Next four are active_load_balance() statistics:
9) # of times active_load_balance() was called
10) # of times active_load_balance() caused this cpu to gain a task
11) # of times active_load_balance() caused this cpu to lose a task
12) # of times active_load_balance() tried to move a task and failed
Next three are try_to_wake_up() statistics:
13) # of times try_to_wake_up() was called
14) # of times try_to_wake_up() successfully moved the awakening task
15) # of times try_to_wake_up() attempted to move the awakening task
Next two are wake_up_new_task() statistics:
16) # of times wake_up_new_task() was called
17) # of times wake_up_new_task() successfully moved the new task
Next one is a sched_migrate_task() statistic:
18) # of times sched_migrate_task() was called
Next one is a sched_balance_exec() statistic:
19) # of times sched_balance_exec() was called
Next two are try_to_wake_up() statistics:
8) # of times try_to_wake_up() was called
9) # of times try_to_wake_up() was called to wake up the local cpu
Next three are statistics describing scheduling latency:
20) sum of all time spent running by tasks on this processor (in ms)
21) sum of all time spent waiting to run by tasks on this processor (in ms)
22) # of tasks (not necessarily unique) given to the processor
The last six are statistics dealing with pull_task():
23) # of times pull_task() moved a task to this cpu when newly idle
24) # of times pull_task() stole a task from this cpu when another cpu
was newly idle
25) # of times pull_task() moved a task to this cpu when idle
26) # of times pull_task() stole a task from this cpu when another cpu
was idle
27) # of times pull_task() moved a task to this cpu when busy
28) # of times pull_task() stole a task from this cpu when another cpu
was busy
10) sum of all time spent running by tasks on this processor (in jiffies)
11) sum of all time spent waiting to run by tasks on this processor (in
jiffies)
12) # of timeslices run on this cpu
Domain statistics
@ -89,65 +62,95 @@ One of these is produced per domain for each cpu described. (Note that if
CONFIG_SMP is not defined, *no* domains are utilized and these lines
will not appear in the output.)
domain<N> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
domain<N> <cpumask> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
The first field is a bit mask indicating what cpus this domain operates over.
The next fifteen are a variety of load_balance() statistics:
The next 24 are a variety of load_balance() statistics in grouped into types
of idleness (idle, busy, and newly idle):
1) # of times in this domain load_balance() was called when the cpu
was idle
2) # of times in this domain load_balance() was called when the cpu
was busy
3) # of times in this domain load_balance() was called when the cpu
was just becoming idle
4) # of times in this domain load_balance() tried to move one or more
tasks and failed, when the cpu was idle
5) # of times in this domain load_balance() tried to move one or more
tasks and failed, when the cpu was busy
6) # of times in this domain load_balance() tried to move one or more
tasks and failed, when the cpu was just becoming idle
7) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was idle
8) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was busy
9) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was just becoming idle
10) # of times in this domain load_balance() was called but did not find
a busier queue while the cpu was idle
11) # of times in this domain load_balance() was called but did not find
a busier queue while the cpu was busy
12) # of times in this domain load_balance() was called but did not find
a busier queue while the cpu was just becoming idle
13) # of times in this domain a busier queue was found while the cpu was
idle but no busier group was found
14) # of times in this domain a busier queue was found while the cpu was
busy but no busier group was found
15) # of times in this domain a busier queue was found while the cpu was
just becoming idle but no busier group was found
1) # of times in this domain load_balance() was called when the
cpu was idle
2) # of times in this domain load_balance() checked but found
the load did not require balancing when the cpu was idle
3) # of times in this domain load_balance() tried to move one or
more tasks and failed, when the cpu was idle
4) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was idle
5) # of times in this domain pull_task() was called when the cpu
was idle
6) # of times in this domain pull_task() was called even though
the target task was cache-hot when idle
7) # of times in this domain load_balance() was called but did
not find a busier queue while the cpu was idle
8) # of times in this domain a busier queue was found while the
cpu was idle but no busier group was found
Next two are sched_balance_exec() statistics:
17) # of times in this domain sched_balance_exec() successfully pushed
a task to a new cpu
18) # of times in this domain sched_balance_exec() tried but failed to
push a task to a new cpu
9) # of times in this domain load_balance() was called when the
cpu was busy
10) # of times in this domain load_balance() checked but found the
load did not require balancing when busy
11) # of times in this domain load_balance() tried to move one or
more tasks and failed, when the cpu was busy
12) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was busy
13) # of times in this domain pull_task() was called when busy
14) # of times in this domain pull_task() was called even though the
target task was cache-hot when busy
15) # of times in this domain load_balance() was called but did not
find a busier queue while the cpu was busy
16) # of times in this domain a busier queue was found while the cpu
was busy but no busier group was found
Next two are try_to_wake_up() statistics:
19) # of times in this domain try_to_wake_up() tried to move a task based
on affinity and cache warmth
20) # of times in this domain try_to_wake_up() tried to move a task based
on load balancing
17) # of times in this domain load_balance() was called when the
cpu was just becoming idle
18) # of times in this domain load_balance() checked but found the
load did not require balancing when the cpu was just becoming idle
19) # of times in this domain load_balance() tried to move one or more
tasks and failed, when the cpu was just becoming idle
20) sum of imbalances discovered (if any) with each call to
load_balance() in this domain when the cpu was just becoming idle
21) # of times in this domain pull_task() was called when newly idle
22) # of times in this domain pull_task() was called even though the
target task was cache-hot when just becoming idle
23) # of times in this domain load_balance() was called but did not
find a busier queue while the cpu was just becoming idle
24) # of times in this domain a busier queue was found while the cpu
was just becoming idle but no busier group was found
Next three are active_load_balance() statistics:
25) # of times active_load_balance() was called
26) # of times active_load_balance() tried to move a task and failed
27) # of times active_load_balance() successfully moved a task
Next three are sched_balance_exec() statistics:
28) sbe_cnt is not used
29) sbe_balanced is not used
30) sbe_pushed is not used
Next three are sched_balance_fork() statistics:
31) sbf_cnt is not used
32) sbf_balanced is not used
33) sbf_pushed is not used
Next three are try_to_wake_up() statistics:
34) # of times in this domain try_to_wake_up() awoke a task that
last ran on a different cpu in this domain
35) # of times in this domain try_to_wake_up() moved a task to the
waking cpu because it was cache-cold on its own cpu anyway
36) # of times in this domain try_to_wake_up() started passive balancing
/proc/<pid>/schedstat
----------------
schedstats also adds a new /proc/<pid/schedstat file to include some of
the same information on a per-process level. There are three fields in
this file correlating to fields 20, 21, and 22 in the CPU fields, but
they only apply for that process.
this file correlating for that process to:
1) time spent on the cpu
2) time spent waiting on a runqueue
3) # of timeslices run on this cpu
A program could be easily written to make use of these extra fields to
report on how well a particular process or set of processes is faring
under the scheduler's policies. A simple version of such a program is
available at
http://eaglet.rain.com/rick/linux/schedstat/v10/latency.c
http://eaglet.rain.com/rick/linux/schedstat/v12/latency.c

202
Documentation/spi/spidev_test.c Normal file
View File

@ -0,0 +1,202 @@
/*
* SPI testing utility (using spidev driver)
*
* Copyright (c) 2007 MontaVista Software, Inc.
* Copyright (c) 2007 Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* Cross-compile with cross-gcc -I/path/to/cross-kernel/include
*/
#include <stdint.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
static void pabort(const char *s)
{
perror(s);
abort();
}
static char *device = "/dev/spidev1.1";
static uint8_t mode;
static uint8_t bits = 8;
static uint32_t speed = 500000;
static uint16_t delay;
static void transfer(int fd)
{
int ret;
uint8_t tx[] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD,
0xF0, 0x0D,
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = ARRAY_SIZE(tx),
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret == 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
if (!(ret % 6))
puts("");
printf("%.2X ", rx[ret]);
}
puts("");
}
void print_usage(char *prog)
{
printf("Usage: %s [-DsbdlHOLC3]\n", prog);
puts(" -D --device device to use (default /dev/spidev1.1)\n"
" -s --speed max speed (Hz)\n"
" -d --delay delay (usec)\n"
" -b --bpw bits per word \n"
" -l --loop loopback\n"
" -H --cpha clock phase\n"
" -O --cpol clock polarity\n"
" -L --lsb least significant bit first\n"
" -C --cs-high chip select active high\n"
" -3 --3wire SI/SO signals shared\n");
exit(1);
}
void parse_opts(int argc, char *argv[])
{
while (1) {
static struct option lopts[] = {
{ "device", 1, 0, 'D' },
{ "speed", 1, 0, 's' },
{ "delay", 1, 0, 'd' },
{ "bpw", 1, 0, 'b' },
{ "loop", 0, 0, 'l' },
{ "cpha", 0, 0, 'H' },
{ "cpol", 0, 0, 'O' },
{ "lsb", 0, 0, 'L' },
{ "cs-high", 0, 0, 'C' },
{ "3wire", 0, 0, '3' },
{ NULL, 0, 0, 0 },
};
int c;
c = getopt_long(argc, argv, "D:s:d:b:lHOLC3", lopts, NULL);
if (c == -1)
break;
switch (c) {
case 'D':
device = optarg;
break;
case 's':
speed = atoi(optarg);
break;
case 'd':
delay = atoi(optarg);
break;
case 'b':
bits = atoi(optarg);
break;
case 'l':
mode |= SPI_LOOP;
break;
case 'H':
mode |= SPI_CPHA;
break;
case 'O':
mode |= SPI_CPOL;
break;
case 'L':
mode |= SPI_LSB_FIRST;
break;
case 'C':
mode |= SPI_CS_HIGH;
break;
case '3':
mode |= SPI_3WIRE;
break;
default:
print_usage(argv[0]);
break;
}
}
}
int main(int argc, char *argv[])
{
int ret = 0;
int fd;
parse_opts(argc, argv);
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
/*
* spi mode
*/
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't get bits per word");
/*
* max speed hz
*/
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
printf("spi mode: %d\n", mode);
printf("bits per word: %d\n", bits);
printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
transfer(fd);
close(fd);
return ret;
}

2
Documentation/stable_api_nonsense.txt
View File

@ -10,7 +10,7 @@ kernel to userspace interfaces. The kernel to userspace interface is
the one that application programs use, the syscall interface. That
interface is _very_ stable over time, and will not break. I have old
programs that were built on a pre 0.9something kernel that still work
just fine on the latest 2.6 kernel release. This interface is the one
just fine on the latest 2.6 kernel release. That interface is the one
that users and application programmers can count on being stable.

72
Documentation/sysfs-rules.txt
View File

@ -1,19 +1,18 @@
Rules on how to access information in the Linux kernel sysfs
The kernel exported sysfs exports internal kernel implementation-details
The kernel-exported sysfs exports internal kernel implementation details
and depends on internal kernel structures and layout. It is agreed upon
by the kernel developers that the Linux kernel does not provide a stable
internal API. As sysfs is a direct export of kernel internal
structures, the sysfs interface can not provide a stable interface eighter,
structures, the sysfs interface cannot provide a stable interface either;
it may always change along with internal kernel changes.
To minimize the risk of breaking users of sysfs, which are in most cases
low-level userspace applications, with a new kernel release, the users
of sysfs must follow some rules to use an as abstract-as-possible way to
of sysfs must follow some rules to use an as-abstract-as-possible way to
access this filesystem. The current udev and HAL programs already
implement this and users are encouraged to plug, if possible, into the
abstractions these programs provide instead of accessing sysfs
directly.
abstractions these programs provide instead of accessing sysfs directly.
But if you really do want or need to access sysfs directly, please follow
the following rules and then your programs should work with future
@ -25,22 +24,22 @@ versions of the sysfs interface.
implementation details in its own API. Therefore it is not better than
reading directories and opening the files yourself.
Also, it is not actively maintained, in the sense of reflecting the
current kernel-development. The goal of providing a stable interface
to sysfs has failed, it causes more problems, than it solves. It
current kernel development. The goal of providing a stable interface
to sysfs has failed; it causes more problems than it solves. It
violates many of the rules in this document.
- sysfs is always at /sys
Parsing /proc/mounts is a waste of time. Other mount points are a
system configuration bug you should not try to solve. For test cases,
possibly support a SYSFS_PATH environment variable to overwrite the
applications behavior, but never try to search for sysfs. Never try
application's behavior, but never try to search for sysfs. Never try
to mount it, if you are not an early boot script.
- devices are only "devices"
There is no such thing like class-, bus-, physical devices,
interfaces, and such that you can rely on in userspace. Everything is
just simply a "device". Class-, bus-, physical, ... types are just
kernel implementation details, which should not be expected by
kernel implementation details which should not be expected by
applications that look for devices in sysfs.
The properties of a device are:
@ -48,11 +47,11 @@ versions of the sysfs interface.
- identical to the DEVPATH value in the event sent from the kernel
at device creation and removal
- the unique key to the device at that point in time
- the kernels path to the device-directory without the leading
- the kernel's path to the device directory without the leading
/sys, and always starting with with a slash
- all elements of a devpath must be real directories. Symlinks
pointing to /sys/devices must always be resolved to their real
target, and the target path must be used to access the device.
target and the target path must be used to access the device.
That way the devpath to the device matches the devpath of the
kernel used at event time.
- using or exposing symlink values as elements in a devpath string
@ -73,17 +72,17 @@ versions of the sysfs interface.
link
- it is retrieved by reading the "driver"-link and using only the
last element of the target path
- devices which do not have "driver"-link, just do not have a
driver; copying the driver value in a child device context, is a
- devices which do not have "driver"-link just do not have a
driver; copying the driver value in a child device context is a
bug in the application
o attributes
- the files in the device directory or files below a subdirectories
- the files in the device directory or files below subdirectories
of the same device directory
- accessing attributes reached by a symlink pointing to another device,
like the "device"-link, is a bug in the application
Everything else is just a kernel driver-core implementation detail,
Everything else is just a kernel driver-core implementation detail
that should not be assumed to be stable across kernel releases.
- Properties of parent devices never belong into a child device.
@ -91,25 +90,25 @@ versions of the sysfs interface.
context properties. If the device 'eth0' or 'sda' does not have a
"driver"-link, then this device does not have a driver. Its value is empty.
Never copy any property of the parent-device into a child-device. Parent
device-properties may change dynamically without any notice to the
device properties may change dynamically without any notice to the
child device.
- Hierarchy in a single device-tree
- Hierarchy in a single device tree
There is only one valid place in sysfs where hierarchy can be examined
and this is below: /sys/devices.
It is planned, that all device directories will end up in the tree
It is planned that all device directories will end up in the tree
below this directory.
- Classification by subsystem
There are currently three places for classification of devices:
/sys/block, /sys/class and /sys/bus. It is planned that these will
not contain any device-directories themselves, but only flat lists of
not contain any device directories themselves, but only flat lists of
symlinks pointing to the unified /sys/devices tree.
All three places have completely different rules on how to access
device information. It is planned to merge all three
classification-directories into one place at /sys/subsystem,
following the layout of the bus-directories. All buses and
classes, including the converted block-subsystem, will show up
classification directories into one place at /sys/subsystem,
following the layout of the bus directories. All buses and
classes, including the converted block subsystem, will show up
there.
The devices belonging to a subsystem will create a symlink in the
"devices" directory at /sys/subsystem/<name>/devices.
@ -121,38 +120,38 @@ versions of the sysfs interface.
subsystem name.
Assuming /sys/class/<subsystem> and /sys/bus/<subsystem>, or
/sys/block and /sys/class/block are not interchangeable, is a bug in
/sys/block and /sys/class/block are not interchangeable is a bug in
the application.
- Block
The converted block-subsystem at /sys/class/block, or
The converted block subsystem at /sys/class/block or
/sys/subsystem/block will contain the links for disks and partitions
at the same level, never in a hierarchy. Assuming the block-subsytem to
contain only disks and not partition-devices in the same flat list is
at the same level, never in a hierarchy. Assuming the block subsytem to
contain only disks and not partition devices in the same flat list is
a bug in the application.
- "device"-link and <subsystem>:<kernel name>-links
Never depend on the "device"-link. The "device"-link is a workaround
for the old layout, where class-devices are not created in
/sys/devices/ like the bus-devices. If the link-resolving of a
device-directory does not end in /sys/devices/, you can use the
for the old layout, where class devices are not created in
/sys/devices/ like the bus devices. If the link-resolving of a
device directory does not end in /sys/devices/, you can use the
"device"-link to find the parent devices in /sys/devices/. That is the
single valid use of the "device"-link, it must never appear in any
single valid use of the "device"-link; it must never appear in any
path as an element. Assuming the existence of the "device"-link for
a device in /sys/devices/ is a bug in the application.
Accessing /sys/class/net/eth0/device is a bug in the application.
Never depend on the class-specific links back to the /sys/class
directory. These links are also a workaround for the design mistake
that class-devices are not created in /sys/devices. If a device
that class devices are not created in /sys/devices. If a device
directory does not contain directories for child devices, these links
may be used to find the child devices in /sys/class. That is the single
valid use of these links, they must never appear in any path as an
valid use of these links; they must never appear in any path as an
element. Assuming the existence of these links for devices which are
real child device directories in the /sys/devices tree, is a bug in
real child device directories in the /sys/devices tree is a bug in
the application.
It is planned to remove all these links when when all class-device
It is planned to remove all these links when all class device
directories live in /sys/devices.
- Position of devices along device chain can change.
@ -161,6 +160,5 @@ versions of the sysfs interface.
the chain. You must always request the parent device you are looking for
by its subsystem value. You need to walk up the chain until you find
the device that matches the expected subsystem. Depending on a specific
position of a parent device, or exposing relative paths, using "../" to
access the chain of parents, is a bug in the application.
position of a parent device or exposing relative paths using "../" to
access the chain of parents is a bug in the application.

37
MAINTAINERS
View File

@ -387,21 +387,6 @@ P: Jaya Kumar
M: jayalk@intworks.biz
S: Maintained
ARM26 ARCHITECTURE
P: Ian Molton
M: spyro@f2s.com
S: Maintained
ARM26/ARCHIMEDES
P: Ian Molton
M: spyro@f2s.com
S: Maintained
ARM26/A5000
P: John Appleby
M: john@dnsworld.co.uk
S: Maintained
ARM MFM AND FLOPPY DRIVERS
P: Ian Molton
M: spyro@f2s.com
@ -771,6 +756,14 @@ L: uclinux-dist-devel@blackfin.uclinux.org (subscribers-only)
W: http://blackfin.uclinux.org
S: Supported
BLACKFIN WATCHDOG DRIVER
P: Mike Frysinger
M: michael.frysinger@analog.com
M: vapier.adi@gmail.com
L: uclinux-dist-devel@blackfin.uclinux.org (subscribers-only)
W: http://blackfin.uclinux.org
S: Supported
BAYCOM/HDLCDRV DRIVERS FOR AX.25
P: Thomas Sailer
M: t.sailer@alumni.ethz.ch
@ -2171,6 +2164,8 @@ W: http://www.kerneljanitors.org/
S: Maintained
KERNEL NFSD
P: J. Bruce Fields
M: bfields@fieldses.org
P: Neil Brown
M: neilb@suse.de
L: nfs@lists.sourceforge.net
@ -3339,6 +3334,14 @@ M: thomas@winischhofer.net
W: http://www.winischhofer.at/linuxsisusbvga.shtml
S: Maintained
SLAB ALLOCATOR
P: Christoph Lameter
M: clameter@sgi.com
P: Pekka Enberg
M: penberg@cs.helsinki.fi
L: linux-mm@kvack.org
S: Maintained
SMC91x ETHERNET DRIVER
P: Nicolas Pitre
M: nico@cam.org
@ -3666,11 +3669,9 @@ W: http://www.auk.cx/tms380tr/
S: Maintained
TULIP NETWORK DRIVER
P: Valerie Henson
M: val@nmt.edu
L: tulip-users@lists.sourceforge.net
W: http://sourceforge.net/projects/tulip/
S: Maintained
S: Orphan
TUN/TAP driver
P: Maxim Krasnyansky

2
Makefile
View File

@ -299,7 +299,7 @@ CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(C
MODFLAGS = -DMODULE
CFLAGS_MODULE = $(MODFLAGS)
AFLAGS_MODULE = $(MODFLAGS)
LDFLAGS_MODULE = -r
LDFLAGS_MODULE =
CFLAGS_KERNEL =
AFLAGS_KERNEL =

2
arch/alpha/boot/Makefile
View File

@ -104,7 +104,7 @@ OBJ_bootlx := $(obj)/head.o $(obj)/main.o
OBJ_bootph := $(obj)/head.o $(obj)/bootp.o
OBJ_bootpzh := $(obj)/head.o $(obj)/bootpz.o $(obj)/misc.o
$(obj)/bootloader: $(obj)/bootloader.lds $(OBJ_bootlx) FORCE
$(obj)/bootloader: $(obj)/bootloader.lds $(OBJ_bootlx) $(LIBS_Y) FORCE
$(call if_changed,ld)
$(obj)/bootpheader: $(obj)/bootloader.lds $(OBJ_bootph) $(LIBS_Y) FORCE

2
arch/alpha/boot/main.c
View File

@ -132,7 +132,7 @@ static inline long load(long dev, unsigned long addr, unsigned long count)
if (result)
srm_printk("Boot file specification (%s) not implemented\n",
bootfile);
return callback_read(dev, count, addr, boot_size/512 + 1);
return callback_read(dev, count, (void *)addr, boot_size/512 + 1);
}
/*

5
arch/alpha/boot/tools/mkbb.c
View File

@ -11,6 +11,7 @@
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
/* Minimal definition of disklabel, so we don't have to include
@ -114,7 +115,7 @@ int main(int argc, char ** argv)
nread = read(fd, &bootloader_image, sizeof(bootblock));
if(nread != sizeof(bootblock)) {
perror("lxboot read");
fprintf(stderr, "expected %d, got %d\n", sizeof(bootblock), nread);
fprintf(stderr, "expected %zd, got %d\n", sizeof(bootblock), nread);
exit(0);
}
@ -122,7 +123,7 @@ int main(int argc, char ** argv)
nread = read(dev, &bootblock_from_disk, sizeof(bootblock));
if(nread != sizeof(bootblock)) {
perror("bootblock read");
fprintf(stderr, "expected %d, got %d\n", sizeof(bootblock), nread);
fprintf(stderr, "expected %zd, got %d\n", sizeof(bootblock), nread);
exit(0);
}

2
arch/alpha/boot/tools/objstrip.c
View File

@ -144,7 +144,7 @@ main (int argc, char *argv[])
#ifdef __ELF__
elf = (struct elfhdr *) buf;
if (elf->e_ident[0] == 0x7f && strncmp(elf->e_ident + 1, "ELF", 3) == 0) {
if (elf->e_ident[0] == 0x7f && strncmp((char *)elf->e_ident + 1, "ELF", 3) == 0) {
if (elf->e_type != ET_EXEC) {
fprintf(stderr, "%s: %s is not an ELF executable\n",
prog_name, inname);

1
arch/alpha/kernel/head.S
View File

@ -10,6 +10,7 @@
#include <asm/system.h>
#include <asm/asm-offsets.h>
.section .text.head, "ax"
.globl swapper_pg_dir
.globl _stext
swapper_pg_dir=SWAPPER_PGD

10
arch/alpha/kernel/pci.c
View File

@ -195,7 +195,7 @@ pcibios_init(void)
subsys_initcall(pcibios_init);
char * __init
char * __devinit
pcibios_setup(char *str)
{
return str;
@ -204,7 +204,7 @@ pcibios_setup(char *str)
#ifdef ALPHA_RESTORE_SRM_SETUP
static struct pdev_srm_saved_conf *srm_saved_configs;
void __init
void __devinit
pdev_save_srm_config(struct pci_dev *dev)
{
struct pdev_srm_saved_conf *tmp;
@ -247,14 +247,14 @@ pci_restore_srm_config(void)
}
#endif
void __init
void __devinit
pcibios_fixup_resource(struct resource *res, struct resource *root)
{
res->start += root->start;
res->end += root->start;
}
void __init
void __devinit
pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus)
{
/* Update device resources. */
@ -273,7 +273,7 @@ pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus)
}
}
void __init
void __devinit
pcibios_fixup_bus(struct pci_bus *bus)
{
/* Propagate hose info into the subordinate devices. */

4
arch/alpha/kernel/pci_iommu.c
View File

@ -58,7 +58,7 @@ size_for_memory(unsigned long max)
return max;
}
struct pci_iommu_arena *
struct pci_iommu_arena * __init
iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
unsigned long window_size, unsigned long align)
{
@ -117,7 +117,7 @@ iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
return arena;
}
struct pci_iommu_arena *
struct pci_iommu_arena * __init
iommu_arena_new(struct pci_controller *hose, dma_addr_t base,
unsigned long window_size, unsigned long align)
{

7
arch/alpha/kernel/smp.c
View File

@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/err.h>
#include <linux/threads.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
@ -358,7 +359,7 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
/*
* Bring one cpu online.
*/
static int __devinit
static int __cpuinit
smp_boot_one_cpu(int cpuid)
{
struct task_struct *idle;
@ -487,7 +488,7 @@ smp_prepare_boot_cpu(void)
{
}
int __devinit
int __cpuinit
__cpu_up(unsigned int cpu)
{
smp_boot_one_cpu(cpu);
@ -541,7 +542,7 @@ smp_percpu_timer_interrupt(struct pt_regs *regs)
set_irq_regs(old_regs);
}
int __init
int
setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;

1
arch/alpha/kernel/vmlinux.lds.S
View File

@ -15,6 +15,7 @@ SECTIONS
_text = .; /* Text and read-only data */
.text : {
*(.text.head)
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT

3
arch/alpha/mm/init.c
View File

@ -267,8 +267,7 @@ callback_init(void * kernel_end)
/*
* paging_init() sets up the memory map.
*/
void
paging_init(void)
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = {0, };
unsigned long dma_pfn, high_pfn;

3
arch/arm/Kconfig
View File

@ -341,6 +341,7 @@ config ARCH_PXA
select ARCH_MTD_XIP
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Support for Intel's PXA2XX processor line.
@ -990,8 +991,6 @@ source "drivers/pnp/Kconfig"
source "drivers/block/Kconfig"
source "drivers/acorn/block/Kconfig"
if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
|| ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
|| ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \

2
arch/arm/kernel/entry-common.S
View File

@ -46,7 +46,7 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
tst r1, #_TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'

1
arch/arm/kernel/setup.c
View File

@ -23,6 +23,7 @@
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/smp.h>
#include <linux/fs.h>
#include <asm/cpu.h>
#include <asm/elf.h>

3
arch/arm/kernel/smp.c
View File

@ -17,6 +17,7 @@
#include <linux/profile.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/err.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/seq_file.h>
@ -630,7 +631,7 @@ void smp_send_stop(void)
/*
* not supported here
*/
int __init setup_profiling_timer(unsigned int multiplier)
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}

2
arch/arm/kernel/traps.c
View File

@ -352,10 +352,8 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
asmlinkage void do_unexp_fiq (struct pt_regs *regs)
{
#ifndef CONFIG_IGNORE_FIQ
printk("Hmm. Unexpected FIQ received, but trying to continue\n");
printk("You may have a hardware problem...\n");
#endif
}
/*

27
arch/arm/mach-sa1100/jornada720.c
View File

@ -3,6 +3,7 @@
*
* HP Jornada720 init code
*
* Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
* Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
* Copyright (C) 2005 Michael Gernoth <michael@gernoth.net>
*
@ -220,14 +221,16 @@ static struct platform_device sa1111_device = {
.resource = sa1111_resources,
};
static struct platform_device jornada720_mcu_device = {
.name = "jornada720_mcu",
.id = -1,
static struct platform_device jornada_ssp_device = {
.name = "jornada_ssp",
.id = -1,
};
static struct platform_device *devices[] __initdata = {
&sa1111_device,
&jornada720_mcu_device,
#ifdef CONFIG_SA1100_JORNADA720_SSP
&jornada_ssp_device,
#endif
&s1d13xxxfb_device,
};
@ -236,19 +239,19 @@ static int __init jornada720_init(void)
int ret = -ENODEV;
if (machine_is_jornada720()) {
GPDR |= GPIO_GPIO20;
/* oscillator setup (line 116 of HP's doc) */
/* we want to use gpio20 as input to drive the clock of our uart 3 */
GPDR |= GPIO_GPIO20; /* Clear gpio20 pin as input */
TUCR = TUCR_VAL;
/* resetting SA1111 (line 118 of HP's doc) */
GPSR = GPIO_GPIO20;
GPSR = GPIO_GPIO20; /* start gpio20 pin */
udelay(1);
GPCR = GPIO_GPIO20;
GPCR = GPIO_GPIO20; /* stop gpio20 */
udelay(1);
GPSR = GPIO_GPIO20;
udelay(20);
GPSR = GPIO_GPIO20; /* restart gpio20 */
udelay(20); /* give it some time to restart */
ret = platform_add_devices(devices, ARRAY_SIZE(devices));
}
return ret;
}
@ -345,7 +348,7 @@ static void __init jornada720_mach_init(void)
}
MACHINE_START(JORNADA720, "HP Jornada 720")
/* Maintainer: Michael Gernoth <michael@gernoth.net> */
/* Maintainer: Kristoffer Ericson <Kristoffer.Ericson@gmail.com> */
.phys_io = 0x80000000,
.io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
.boot_params = 0xc0000100,

2
arch/arm/mach-sa1100/jornada720_ssp.c
View File

@ -161,7 +161,7 @@ static int __init jornada_ssp_probe(struct platform_device *dev)
ret = jornada_ssp_inout(GETBRIGHTNESS);
/* seems like it worked, just feed it with TxDummy to get rid of data */
if (ret == TxDummy)
if (ret == TXDUMMY)
jornada_ssp_inout(TXDUMMY);
jornada_ssp_end();

1
arch/arm/nwfpe/Makefile
View File

@ -9,5 +9,4 @@ nwfpe-y += fpa11.o fpa11_cpdo.o fpa11_cpdt.o \
softfloat.o single_cpdo.o double_cpdo.o
nwfpe-$(CONFIG_FPE_NWFPE_XP) += extended_cpdo.o
nwfpe-$(CONFIG_CPU_26) += entry26.o
nwfpe-$(CONFIG_CPU_32) += entry.o

112
arch/arm/nwfpe/entry26.S
View File

@ -1,112 +0,0 @@
/*
NetWinder Floating Point Emulator
(c) Rebel.COM, 1998
(c) Philip Blundell 1998-1999
Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <asm/asm-offsets.h>
/* This is the kernel's entry point into the floating point emulator.
It is called from the kernel with code similar to this:
mov fp, #0
teqp pc, #PSR_I_BIT | SVC_MODE
ldr r4, .LC2
ldr pc, [r4] @ Call FP module USR entry point
The kernel expects the emulator to return via one of two possible
points of return it passes to the emulator. The emulator, if
successful in its emulation, jumps to ret_from_exception and the
kernel takes care of returning control from the trap to the user code.
If the emulator is unable to emulate the instruction, it returns to
fpundefinstr and the kernel halts the user program with a core dump.
This routine does four things:
1) It saves SP into a variable called userRegisters. The kernel has
created a struct pt_regs on the stack and saved the user registers
into it. See /usr/include/asm/proc/ptrace.h for details. The
emulator code uses userRegisters as the base of an array of words from
which the contents of the registers can be extracted.
2) It locates the FP emulator work area within the TSS structure and
points `fpa11' to it.
3) It calls EmulateAll to emulate a floating point instruction.
EmulateAll returns 1 if the emulation was successful, or 0 if not.
4) If an instruction has been emulated successfully, it looks ahead at
the next instruction. If it is a floating point instruction, it
executes the instruction, without returning to user space. In this
way it repeatedly looks ahead and executes floating point instructions
until it encounters a non floating point instruction, at which time it
returns via _fpreturn.
This is done to reduce the effect of the trap overhead on each
floating point instructions. GCC attempts to group floating point
instructions to allow the emulator to spread the cost of the trap over
several floating point instructions. */
.globl nwfpe_enter
nwfpe_enter:
mov sl, sp
ldr r5, [sp, #60] @ get contents of PC
bic r5, r5, #0xfc000003
ldr r0, [r5, #-4] @ get actual instruction into r0
bl EmulateAll @ emulate the instruction
1: cmp r0, #0 @ was emulation successful
beq fpundefinstr @ no, return failure
next:
.Lx1: ldrt r6, [r5], #4 @ get the next instruction and
@ increment PC
and r2, r6, #0x0F000000 @ test for FP insns
teq r2, #0x0C000000
teqne r2, #0x0D000000
teqne r2, #0x0E000000
bne ret_from_exception @ return ok if not a fp insn
ldr r9, [sp, #60] @ get new condition codes
and r9, r9, #0xfc000003
orr r7, r5, r9
str r7, [sp, #60] @ update PC copy in regs
mov r0, r6 @ save a copy
mov r1, r9 @ fetch the condition codes
bl checkCondition @ check the condition
cmp r0, #0 @ r0 = 0 ==> condition failed
@ if condition code failed to match, next insn
beq next @ get the next instruction;
mov r0, r6 @ prepare for EmulateAll()
adr lr, 1b
orr lr, lr, #3
b EmulateAll @ if r0 != 0, goto EmulateAll
.Lret: b ret_from_exception @ let the user eat segfaults
@ We need to be prepared for the instruction at .Lx1 to fault.
@ Emit the appropriate exception gunk to fix things up.
.section __ex_table,"a"
.align 3
.long .Lx1
ldr lr, [lr, $(.Lret - .Lx1)/4]
.previous

8
arch/arm/plat-omap/mailbox.c
View File

@ -161,11 +161,11 @@ static void mbox_rx_work(struct work_struct *work)
/*
* Mailbox interrupt handler
*/
static void mbox_txq_fn(request_queue_t * q)
static void mbox_txq_fn(struct request_queue * q)
{
}
static void mbox_rxq_fn(request_queue_t * q)
static void mbox_rxq_fn(struct request_queue * q)
{
}
@ -180,7 +180,7 @@ static void __mbox_rx_interrupt(struct omap_mbox *mbox)
{
struct request *rq;
mbox_msg_t msg;
request_queue_t *q = mbox->rxq->queue;
struct request_queue *q = mbox->rxq->queue;
disable_mbox_irq(mbox, IRQ_RX);
@ -297,7 +297,7 @@ static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
request_fn_proc * proc,
void (*work) (struct work_struct *))
{
request_queue_t *q;
struct request_queue *q;
struct omap_mbox_queue *mq;
mq = kzalloc(sizeof(struct omap_mbox_queue), GFP_KERNEL);

29
arch/arm26/ACKNOWLEDGEMENTS
View File

@ -1,29 +0,0 @@
The work in this architecture (ARM26) is that of a great many people.
This is what has happened:
I [Ian Molton] have been trying to repair the ARM26 architecture support, but it has become an impossible task whilst it is still merged with the ARM32 (arch/arm) code. The ARM26 code is too different to be sensible to keep with the ARM32 code now, and Russell King really doesnt have the time to maintain the ARM26 code. Add to that that most ARM32 developers dont know about or care about ARM26 when writing patches, and you have a reall mess.
As a result, I've split it off into a new architecture of its own. I've named it arm26 since these CPUs have only a 26 bit address space, unlike the other ARMs.
The upheaval in moving around so many source files and chopping out vasty ammounts of cruft was enormous, and the copyright of many files is sometimes unclear. Because of this, I am writing this, in order that no-one is left out / misaccredited / blamed for any of the code.
People I KNOW have made major contributions to the code:
David Alan Gilbert (former maintainer of ARM26 bits)
Philip Blundell
Russell King
Keith Owens
also thanks to Nicholas Pitre for hints, and for the basis or our XIP support.
Currently maintaing the code are
Ian Molton (Maintainer / Archimedes)
John Appleby (kernel / A5K)
If anyone has a problem with attributions in header files / source files, please do contact me to straighten things out.
Ian Molton (aka spyro) - ARM26 maintainer
spyro@f2s.com

253
arch/arm26/Kconfig
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@ -1,253 +0,0 @@
#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "Linux Kernel Configuration"
config ARM
bool
default y
config ARM26
bool
default y
config MMU
bool
default y
config NO_DMA
def_bool y
config ARCH_ACORN
bool
default y
config CPU_26
bool
default y
config FIQ
bool
default y
# 9 = 512 pages 8 = 256 pages 7 = 128 pages
config FORCE_MAX_ZONEORDER
int
default 9
config RWSEM_GENERIC_SPINLOCK
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
config ARCH_HAS_ILOG2_U32
bool
default n
config ARCH_HAS_ILOG2_U64
bool
default n
config GENERIC_HWEIGHT
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y
config ZONE_DMA
bool
default y
config GENERIC_ISA_DMA
bool
config ARCH_MAY_HAVE_PC_FDC
bool
source "init/Kconfig"
menu "System Type"
choice
prompt "Archimedes/A5000 Implementations"
config ARCH_ARC
bool "Archimedes"
help
Say Y to support the Acorn Archimedes.
The Acorn Archimedes was an personal computer based on an 8MHz ARM2
processor, released in 1987. It supported up to 16MB of RAM in
later models and floppy, harddisc, ethernet etc.
config ARCH_A5K
bool "A5000"
select ARCH_MAY_HAVE_PC_FDC
help
Say Y here to support the Acorn A5000.
Linux can support the
internal IDE disk and CD-ROM interface, serial and parallel port,
and the floppy drive. Note that on some A5000s the floppy is
plugged into the wrong socket on the motherboard.
config PAGESIZE_16
bool "2MB physical memory (broken)"
help
Say Y here if your Archimedes or A5000 system has only 2MB of
memory, otherwise say N. The resulting kernel will not run on a
machine with 4MB of memory.
endchoice
endmenu
config ISA_DMA_API
bool
default y
menu "General setup"
# Compressed boot loader in ROM. Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM
bool "Compressed boot loader in ROM/flash"
help
Say Y here if you intend to execute your compressed kernel image (zImage)
directly from ROM or flash. If unsure, say N.
config ZBOOT_ROM_TEXT
depends on ZBOOT_ROM
hex "Compressed ROM boot loader base address"
default "0"
help
The base address for zImage. Unless you have special requirements, you
should not change this value.
config ZBOOT_ROM_BSS
depends on ZBOOT_ROM
hex "Compressed ROM boot loader BSS address"
default "0"
help
The base address of 64KiB of read/write memory, which must be available
while the decompressor is running. Unless you have special requirements,
you should not change this value.
config XIP_KERNEL
bool "Execute In Place (XIP) kernel image"
help
Select this option to create a kernel that can be programmed into
the OS ROMs.
comment "At least one math emulation must be selected"
config FPE_NWFPE
tristate "NWFPE math emulation"
---help---
Say Y to include the NWFPE floating point emulator in the kernel.
This is necessary to run most binaries. Linux does not currently
support floating point hardware so you need to say Y here even if
your machine has an FPA or floating point co-processor module.
It is also possible to say M to build the emulator as a module
(nwfpe) or indeed to leave it out altogether. However, unless you
know what you are doing this can easily render your machine
unbootable. Saying Y is the safe option.
You may say N here if you are going to load the Acorn FPEmulator
early in the bootup.
source "fs/Kconfig.binfmt"
config PREEMPT
bool "Preemptible Kernel (EXPERIMENTAL)"
depends on CPU_32 && EXPERIMENTAL
help
This option reduces the latency of the kernel when reacting to
real-time or interactive events by allowing a low priority process to
be preempted even if it is in kernel mode executing a system call.
This allows applications to run more reliably even when the system is
under load.
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
config ARTHUR
tristate "RISC OS personality"
depends on CPU_32
help
Say Y here to include the kernel code necessary if you want to run
Acorn RISC OS/Arthur binaries under Linux. This code is still very
experimental; if this sounds frightening, say N and sleep in peace.
You can also say M here to compile this support as a module (which
will be called arthur).
config CMDLINE
string "Default kernel command string"
default ""
help
On some architectures (EBSA110 and CATS), there is currently no way
for the boot loader to pass arguments to the kernel. For these
architectures, you should supply some command-line options at build
time by entering them here. As a minimum, you should specify the
memory size and the root device (e.g., mem=64M root=/dev/nfs).
source "mm/Kconfig"
endmenu
source "net/Kconfig"
source "drivers/base/Kconfig"
source "drivers/parport/Kconfig"
source "drivers/pnp/Kconfig"
source "drivers/block/Kconfig"
source "drivers/md/Kconfig"
source "drivers/net/Kconfig"
source "drivers/ide/Kconfig"
source "drivers/scsi/Kconfig"
source "drivers/isdn/Kconfig"
#
# input before char - char/joystick depends on it. As does USB.
#
source "drivers/input/Kconfig"
source "drivers/char/Kconfig"
source "drivers/media/Kconfig"
source "fs/Kconfig"
source "drivers/video/Kconfig"
if ARCH_ACORN
source "sound/Kconfig"
endif
source "drivers/misc/Kconfig"
source "drivers/usb/Kconfig"
source "arch/arm26/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"

50
arch/arm26/Kconfig.debug
View File

@ -1,50 +0,0 @@
menu "Kernel hacking"
source "lib/Kconfig.debug"
# RMK wants arm kernels compiled with frame pointers so hardwire this to y.
# If you know what you are doing and are willing to live without stack
# traces, you can get a slightly smaller kernel by setting this option to
# n, but then RMK will have to kill you ;).
config FRAME_POINTER
bool
default y
help
If you say N here, the resulting kernel will be slightly smaller and
faster. However, when a problem occurs with the kernel, the
information that is reported is severely limited. Most people
should say Y here.
config DEBUG_USER
bool "Verbose user fault messages"
help
When a user program crashes due to an exception, the kernel can
print a brief message explaining what the problem was. This is
sometimes helpful for debugging but serves no purpose on a
production system. Most people should say N here.
config DEBUG_WAITQ
bool "Wait queue debugging"
depends on DEBUG_KERNEL
config DEBUG_ERRORS
bool "Verbose kernel error messages"
depends on DEBUG_KERNEL
help
This option controls verbose debugging information which can be
printed when the kernel detects an internal error. This debugging
information is useful to kernel hackers when tracking down problems,
but mostly meaningless to other people. It's safe to say Y unless
you are concerned with the code size or don't want to see these
messages.
# These options are only for real kernel hackers who want to get their hands dirty.
config DEBUG_LL
bool "Kernel low-level debugging functions"
depends on DEBUG_KERNEL
help
Say Y here to include definitions of printascii, printchar, printhex
in the kernel. This is helpful if you are debugging code that
executes before the console is initialized.
endmenu

107
arch/arm26/Makefile
View File

@ -1,107 +0,0 @@
#
# arch/arm26/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-2001 by Russell King
# Copyright (c) 2004 Ian Molton
LDFLAGS_vmlinux :=-p -X
CPPFLAGS_vmlinux.lds = -DTEXTADDR=$(TEXTADDR) -DDATAADDR=$(DATAADDR)
OBJCOPYFLAGS :=-O binary -R .note -R .comment -S
GZFLAGS :=-9
ifeq ($(CONFIG_FRAME_POINTER),y)
CFLAGS +=-fno-omit-frame-pointer -mno-sched-prolog
endif
CFLAGS_BOOT :=-mapcs-26 -mcpu=arm3 -msoft-float -Uarm
CFLAGS +=-mapcs-26 -mcpu=arm3 -msoft-float -Uarm
AFLAGS +=-mapcs-26 -mcpu=arm3 -msoft-float
ifeq ($(CONFIG_XIP_KERNEL),y)
TEXTADDR := 0x03880000
DATAADDR := 0x02080000
else
TEXTADDR := 0x02080000
DATAADDR := .
endif
head-y := arch/arm26/kernel/head.o arch/arm26/kernel/init_task.o
ifeq ($(incdir-y),)
incdir-y :=
endif
INCDIR :=
export MACHINE TEXTADDR GZFLAGS CFLAGS_BOOT
# If we have a machine-specific directory, then include it in the build.
core-y += arch/arm26/kernel/ arch/arm26/mm/ arch/arm26/machine/
core-$(CONFIG_FPE_NWFPE) += arch/arm26/nwfpe/
libs-y += arch/arm26/lib/
# Default target when executing plain make
all: zImage
boot := arch/arm26/boot
PHONY += maketools FORCE
maketools: FORCE
# Convert bzImage to zImage
bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/zImage
zImage Image bootpImage xipImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
zinstall install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
# We use MRPROPER_FILES and CLEAN_FILES now
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
# My testing targets (that short circuit a few dependencies)
zImg:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/zImage
Img:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/Image
bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
i:; $(Q)$(MAKE) $(build)=$(boot) install
zi:; $(Q)$(MAKE) $(build)=$(boot) zinstall
#
# Configuration targets. Use these to select a
# configuration for your architecture
%_config:
@( \
CFG=$(@:_config=); \
if [ -f arch/arm26/def-configs/$$CFG ]; then \
[ -f .config ] && mv -f .config .config.old; \
cp arch/arm26/def-configs/$$CFG .config; \
echo "*** Default configuration for $$CFG installed"; \
echo "*** Next, you may run 'make oldconfig'"; \
else \
echo "$$CFG does not exist"; \
fi; \
)
define archhelp
echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
echo ' bootpImage - Combined zImage and initial RAM disk'
echo ' xipImage - eXecute In Place capable image for ROM use (arch/$(ARCH)/boot/xipImage)'
echo ' initrd - Create an initial image'
echo ' install - Install uncompressed kernel'
echo ' zinstall - Install compressed kernel'
echo ' Install using (your) ~/bin/installkernel or'
echo ' (distribution) /sbin/installkernel or'
echo ' install to $$(INSTALL_PATH) and run lilo'
endef

83
arch/arm26/boot/Makefile
View File

@ -1,83 +0,0 @@
#
# arch/arm26/boot/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-2002 Russell King
#
# Note: the following conditions must always be true:
# ZRELADDR == virt_to_phys(TEXTADDR)
# PARAMS_PHYS must be with 4MB of ZRELADDR
# INITRD_PHYS must be in RAM
zreladdr-y := 0x02080000
params_phys-y := 0x0207c000
initrd_phys-y := 0x02180000
ZRELADDR := 0x02080000
ZTEXTADDR := 0x0207c000
PARAMS_PHYS := $(params_phys-y)
INITRD_PHYS := 0x02180000
# We now have a PIC decompressor implementation. Decompressors running
# from RAM should not define ZTEXTADDR. Decompressors running directly
# from ROM or Flash must define ZTEXTADDR (preferably via the config)
# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
ifeq ($(CONFIG_ZBOOT_ROM),y)
ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT)
ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS)
else
ZTEXTADDR := 0
ZBSSADDR := ALIGN(4)
endif
export ZTEXTADDR ZBSSADDR ZRELADDR INITRD_PHYS PARAMS_PHYS
targets := Image zImage bootpImage xipImage
$(obj)/Image: vmlinux FORCE
$(call if_changed,objcopy)
@echo ' Kernel: $@ is ready'
$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy)
@echo ' Kernel: $@ is ready'
$(obj)/compressed/vmlinux: vmlinux FORCE
$(Q)$(MAKE) $(build)=$(obj)/compressed $@
ifeq ($(CONFIG_XIP_KERNEL),y)
$(obj)/xipImage: vmlinux FORCE
# $(OBJCOPY) -S -O binary -R .data -R .comment vmlinux vmlinux-text.bin
# FIXME - where has .pci_fixup crept in from?
$(OBJCOPY) -S -O binary -R .data -R .pci_fixup -R .comment vmlinux vmlinux-text.bin
$(OBJCOPY) -S -O binary -R .init -R .text -R __ex_table -R .pci_fixup -R __ksymtab -R __ksymtab_gpl -R __kcrctab -R __kcrctab_gpl -R __param -R .comment vmlinux vmlinux-data.bin
cat vmlinux-text.bin vmlinux-data.bin > $@
$(RM) -f vmlinux-text.bin vmlinux-data.bin
@echo ' Kernel: $@ is ready'
endif
PHONY += initrd
initrd:
@test "$(INITRD_PHYS)" != "" || \
(echo This machine does not support INITRD; exit -1)
@test "$(INITRD)" != "" || \
(echo You must specify INITRD; exit -1)
install: $(obj)/Image
$(CONFIG_SHELL) $(obj)/install.sh \
$(KERNELRELEASE) \
$(obj)/Image System.map "$(INSTALL_PATH)"
zinstall: $(obj)/zImage
$(CONFIG_SHELL) $(obj)/install.sh \
$(KERNELRELEASE) \
$(obj)/zImage System.map "$(INSTALL_PATH)"
subdir- := compressed

50
arch/arm26/boot/compressed/Makefile
View File

@ -1,50 +0,0 @@
#
# linux/arch/arm26/boot/compressed/Makefile
#
# create a compressed vmlinuz image from the original vmlinux
#
# Note! ZTEXTADDR, ZBSSADDR and ZRELADDR are now exported
# from arch/arm26/boot/Makefile
#
HEAD = head.o
OBJS = misc.o
FONTC = drivers/video/console/font_acorn_8x8.c
OBJS += ll_char_wr.o font.o
CFLAGS_misc.o := -DPARAMS_PHYS=$(PARAMS_PHYS)
targets := vmlinux vmlinux.lds piggy piggy.gz piggy.o font.o head.o $(OBJS)
SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/LOAD_ADDR/$(ZRELADDR)/;s/BSS_START/$(ZBSSADDR)/
EXTRA_CFLAGS := $(CFLAGS_BOOT) -fpic
EXTRA_AFLAGS := -traditional
LDFLAGS_vmlinux := -p -X \
$(shell $(CC) $(CFLAGS)) -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
$(addprefix $(obj)/, $(OBJS)) FORCE
$(call if_changed,ld)
@:
$(obj)/piggy: vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/piggy.gz: $(obj)/piggy FORCE
$(call if_changed,gzip)
LDFLAGS_piggy.o := -r -b binary
$(obj)/piggy.o: $(obj)/piggy.gz FORCE
$(call if_changed,ld)
$(obj)/font.o: $(FONTC)
$(CC) $(CFLAGS) -Dstatic= -c $(FONTC) -o $(obj)/font.o
$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in Makefile arch/arm26/boot/Makefile .config
@sed "$(SEDFLAGS)" < $< > $@
$(obj)/misc.o: $(obj)/misc.c $(obj)/uncompress.h lib/inflate.c

516
arch/arm26/boot/compressed/head.S
View File

@ -1,516 +0,0 @@
/*
* linux/arch/arm26/boot/compressed/head.S
*
* Copyright (C) 1996-2002 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
/*
* Debugging stuff
*
* Note that these macros must not contain any code which is not
* 100% relocatable. Any attempt to do so will result in a crash.
* Please select one of the following when turning on debugging.
*/
.macro kputc,val
mov r0, \val
bl putc
.endm
.macro kphex,val,len
mov r0, \val
mov r1, #\len
bl phex
.endm
.macro debug_reloc_start
.endm
.macro debug_reloc_end
.endm
.section ".start", #alloc, #execinstr
/*
* sort out different calling conventions
*/
.align
start:
.type start,#function
.rept 8
mov r0, r0
.endr
b 1f
.word 0x016f2818 @ Magic numbers to help the loader
.word start @ absolute load/run zImage address
.word _edata @ zImage end address
1: mov r7, r1 @ save architecture ID
mov r8, #0 @ save r0
teqp pc, #0x0c000003 @ turn off interrupts
.text
adr r0, LC0
ldmia r0, {r1, r2, r3, r4, r5, r6, ip, sp}
subs r0, r0, r1 @ calculate the delta offset
teq r0, #0 @ if delta is zero, we're
beq not_relocated @ running at the address we
@ were linked at.
add r2, r2, r0 @ different address, so we
add r3, r3, r0 @ need to fix up various
add r5, r5, r0 @ pointers.
add r6, r6, r0
add ip, ip, r0
add sp, sp, r0
1: ldr r1, [r6, #0] @ relocate entries in the GOT
add r1, r1, r0 @ table. This fixes up the
str r1, [r6], #4 @ C references.
cmp r6, ip
blo 1b
not_relocated: mov r0, #0
1: str r0, [r2], #4 @ clear bss
str r0, [r2], #4
str r0, [r2], #4
str r0, [r2], #4
cmp r2, r3
blo 1b
bl cache_on
mov r1, sp @ malloc space above stack
add r2, sp, #0x10000 @ 64k max
/*
* Check to see if we will overwrite ourselves.
* r4 = final kernel address
* r5 = start of this image
* r2 = end of malloc space (and therefore this image)
* We basically want:
* r4 >= r2 -> OK
* r4 + image length <= r5 -> OK
*/
cmp r4, r2
bhs wont_overwrite
add r0, r4, #4096*1024 @ 4MB largest kernel size
cmp r0, r5
bls wont_overwrite
mov r5, r2 @ decompress after malloc space
mov r0, r5
mov r3, r7
bl decompress_kernel
add r0, r0, #127
bic r0, r0, #127 @ align the kernel length
/*
* r0 = decompressed kernel length
* r1-r3 = unused
* r4 = kernel execution address
* r5 = decompressed kernel start
* r6 = processor ID
* r7 = architecture ID
* r8-r14 = unused
*/
add r1, r5, r0 @ end of decompressed kernel
adr r2, reloc_start
ldr r3, LC1
add r3, r2, r3
1: ldmia r2!, {r8 - r13} @ copy relocation code
stmia r1!, {r8 - r13}
ldmia r2!, {r8 - r13}
stmia r1!, {r8 - r13}
cmp r2, r3
blo 1b
bl cache_clean_flush
add pc, r5, r0 @ call relocation code
/*
* We're not in danger of overwriting ourselves. Do this the simple way.
*
* r4 = kernel execution address
* r7 = architecture ID
*/
wont_overwrite: mov r0, r4
mov r3, r7
bl decompress_kernel
b call_kernel
.type LC0, #object
LC0: .word LC0 @ r1
.word __bss_start @ r2
.word _end @ r3
.word _load_addr @ r4
.word _start @ r5
.word _got_start @ r6
.word _got_end @ ip
.word user_stack+4096 @ sp
LC1: .word reloc_end - reloc_start
.size LC0, . - LC0
/*
* Turn on the cache. We need to setup some page tables so that we
* can have both the I and D caches on.
*
* We place the page tables 16k down from the kernel execution address,
* and we hope that nothing else is using it. If we're using it, we
* will go pop!
*
* On entry,
* r4 = kernel execution address
* r6 = processor ID
* r7 = architecture number
* r8 = run-time address of "start"
* On exit,
* r1, r2, r3, r8, r9, r12 corrupted
* This routine must preserve:
* r4, r5, r6, r7
*/
.align 5
cache_on: mov r3, #8 @ cache_on function
b call_cache_fn
__setup_mmu: sub r3, r4, #16384 @ Page directory size
bic r3, r3, #0xff @ Align the pointer
bic r3, r3, #0x3f00
/*
* Initialise the page tables, turning on the cacheable and bufferable
* bits for the RAM area only.
*/
mov r0, r3
mov r8, r0, lsr #18
mov r8, r8, lsl #18 @ start of RAM
add r9, r8, #0x10000000 @ a reasonable RAM size
mov r1, #0x12
orr r1, r1, #3 << 10
add r2, r3, #16384
1: cmp r1, r8 @ if virt > start of RAM
orrhs r1, r1, #0x0c @ set cacheable, bufferable
cmp r1, r9 @ if virt > end of RAM
bichs r1, r1, #0x0c @ clear cacheable, bufferable
str r1, [r0], #4 @ 1:1 mapping
add r1, r1, #1048576
teq r0, r2
bne 1b
/*
* If ever we are running from Flash, then we surely want the cache
* to be enabled also for our execution instance... We map 2MB of it
* so there is no map overlap problem for up to 1 MB compressed kernel.
* If the execution is in RAM then we would only be duplicating the above.
*/
mov r1, #0x1e
orr r1, r1, #3 << 10
mov r2, pc, lsr #20
orr r1, r1, r2, lsl #20
add r0, r3, r2, lsl #2
str r1, [r0], #4
add r1, r1, #1048576
str r1, [r0]
mov pc, lr
__armv4_cache_on:
mov r12, lr
bl __setup_mmu
mov r0, #0
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
mcr p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
mrc p15, 0, r0, c1, c0, 0 @ read control reg
orr r0, r0, #0x1000 @ I-cache enable
orr r0, r0, #0x0030
b __common_cache_on
__arm6_cache_on:
mov r12, lr
bl __setup_mmu
mov r0, #0
mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
mov r0, #0x30
__common_cache_on:
#ifndef DEBUG
orr r0, r0, #0x000d @ Write buffer, mmu
#endif
mov r1, #-1
mcr p15, 0, r3, c2, c0, 0 @ load page table pointer
mcr p15, 0, r1, c3, c0, 0 @ load domain access control
mcr p15, 0, r0, c1, c0, 0 @ load control register
mov pc, r12
/*
* All code following this line is relocatable. It is relocated by
* the above code to the end of the decompressed kernel image and
* executed there. During this time, we have no stacks.
*
* r0 = decompressed kernel length
* r1-r3 = unused
* r4 = kernel execution address
* r5 = decompressed kernel start
* r6 = processor ID
* r7 = architecture ID
* r8-r14 = unused
*/
.align 5
reloc_start: add r8, r5, r0
debug_reloc_start
mov r1, r4
1:
.rept 4
ldmia r5!, {r0, r2, r3, r9 - r13} @ relocate kernel
stmia r1!, {r0, r2, r3, r9 - r13}
.endr
cmp r5, r8
blo 1b
debug_reloc_end
call_kernel: bl cache_clean_flush
bl cache_off
mov r0, #0
mov r1, r7 @ restore architecture number
mov pc, r4 @ call kernel
/*
* Here follow the relocatable cache support functions for the
* various processors. This is a generic hook for locating an
* entry and jumping to an instruction at the specified offset
* from the start of the block. Please note this is all position
* independent code.
*
* r1 = corrupted
* r2 = corrupted
* r3 = block offset
* r6 = corrupted
* r12 = corrupted
*/
call_cache_fn: adr r12, proc_types
mrc p15, 0, r6, c0, c0 @ get processor ID
1: ldr r1, [r12, #0] @ get value
ldr r2, [r12, #4] @ get mask
eor r1, r1, r6 @ (real ^ match)
tst r1, r2 @ & mask
addeq pc, r12, r3 @ call cache function
add r12, r12, #4*5
b 1b
/*
* Table for cache operations. This is basically:
* - CPU ID match
* - CPU ID mask
* - 'cache on' method instruction
* - 'cache off' method instruction
* - 'cache flush' method instruction
*
* We match an entry using: ((real_id ^ match) & mask) == 0
*
* Writethrough caches generally only need 'on' and 'off'
* methods. Writeback caches _must_ have the flush method
* defined.
*/
.type proc_types,#object
proc_types:
.word 0x41560600 @ ARM6/610
.word 0xffffffe0
b __arm6_cache_off @ works, but slow
b __arm6_cache_off
mov pc, lr
@ b __arm6_cache_on @ untested
@ b __arm6_cache_off
@ b __armv3_cache_flush
.word 0x41007000 @ ARM7/710
.word 0xfff8fe00
b __arm7_cache_off
b __arm7_cache_off
mov pc, lr
.word 0x41807200 @ ARM720T (writethrough)
.word 0xffffff00
b __armv4_cache_on
b __armv4_cache_off
mov pc, lr
.word 0x41129200 @ ARM920T
.word 0xff00fff0
b __armv4_cache_on
b __armv4_cache_off
b __armv4_cache_flush
.word 0x4401a100 @ sa110 / sa1100
.word 0xffffffe0
b __armv4_cache_on
b __armv4_cache_off
b __armv4_cache_flush
.word 0x6901b110 @ sa1110
.word 0xfffffff0
b __armv4_cache_on
b __armv4_cache_off
b __armv4_cache_flush
.word 0x69050000 @ xscale
.word 0xffff0000
b __armv4_cache_on
b __armv4_cache_off
b __armv4_cache_flush
.word 0 @ unrecognised type
.word 0
mov pc, lr
mov pc, lr
mov pc, lr
.size proc_types, . - proc_types
/*
* Turn off the Cache and MMU. ARMv3 does not support
* reading the control register, but ARMv4 does.
*
* On entry, r6 = processor ID
* On exit, r0, r1, r2, r3, r12 corrupted
* This routine must preserve: r4, r6, r7
*/
.align 5
cache_off: mov r3, #12 @ cache_off function
b call_cache_fn
__armv4_cache_off:
mrc p15, 0, r0, c1, c0
bic r0, r0, #0x000d
mcr p15, 0, r0, c1, c0 @ turn MMU and cache off
mov r0, #0
mcr p15, 0, r0, c7, c7 @ invalidate whole cache v4
mcr p15, 0, r0, c8, c7 @ invalidate whole TLB v4
mov pc, lr
__arm6_cache_off:
mov r0, #0x00000030 @ ARM6 control reg.
b __armv3_cache_off
__arm7_cache_off:
mov r0, #0x00000070 @ ARM7 control reg.
b __armv3_cache_off
__armv3_cache_off:
mcr p15, 0, r0, c1, c0, 0 @ turn MMU and cache off
mov r0, #0
mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
mov pc, lr
/*
* Clean and flush the cache to maintain consistency.
*
* On entry,
* r6 = processor ID
* On exit,
* r1, r2, r3, r12 corrupted
* This routine must preserve:
* r0, r4, r5, r6, r7
*/
.align 5
cache_clean_flush:
mov r3, #16
b call_cache_fn
__armv4_cache_flush:
bic r1, pc, #31
add r2, r1, #65536 @ 2x the largest dcache size
1: ldr r12, [r1], #32 @ s/w flush D cache
teq r1, r2
bne 1b
mcr p15, 0, r1, c7, c7, 0 @ flush I cache
mcr p15, 0, r1, c7, c10, 4 @ drain WB
mov pc, lr
__armv3_cache_flush:
mov r1, #0
mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
mov pc, lr
/*
* Various debugging routines for printing hex characters and
* memory, which again must be relocatable.
*/
#ifdef DEBUG
.type phexbuf,#object
phexbuf: .space 12
.size phexbuf, . - phexbuf
phex: adr r3, phexbuf
mov r2, #0
strb r2, [r3, r1]
1: subs r1, r1, #1
movmi r0, r3
bmi puts
and r2, r0, #15
mov r0, r0, lsr #4
cmp r2, #10
addge r2, r2, #7
add r2, r2, #'0'
strb r2, [r3, r1]
b 1b
puts: loadsp r3
1: ldrb r2, [r0], #1
teq r2, #0
moveq pc, lr
2: writeb r2
mov r1, #0x00020000
3: subs r1, r1, #1
bne 3b
teq r2, #'\n'
moveq r2, #'\r'
beq 2b
teq r0, #0
bne 1b
mov pc, lr
putc:
mov r2, r0
mov r0, #0
loadsp r3
b 2b
memdump: mov r12, r0
mov r10, lr
mov r11, #0
2: mov r0, r11, lsl #2
add r0, r0, r12
mov r1, #8
bl phex
mov r0, #':'
bl putc
1: mov r0, #' '
bl putc
ldr r0, [r12, r11, lsl #2]
mov r1, #8
bl phex
and r0, r11, #7
teq r0, #3
moveq r0, #' '
bleq putc
and r0, r11, #7
add r11, r11, #1
teq r0, #7
bne 1b
mov r0, #'\n'
bl putc
cmp r11, #64
blt 2b
mov pc, r10
#endif
reloc_end:
.align
.section ".stack", "aw"
user_stack: .space 4096

162
arch/arm26/boot/compressed/ll_char_wr.S
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@ -1,162 +0,0 @@
/*
* linux/arch/arm26/lib/ll_char_wr.S
*
* Copyright (C) 1995, 1996 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Speedups & 1bpp code (C) 1996 Philip Blundell & Russell King.
*
* 10-04-96 RMK Various cleanups & reduced register usage.
* 08-04-98 RMK Shifts re-ordered
*/
@ Regs: [] = corruptible
@ {} = used
@ () = do not use
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
#define BOLD 0x01
#define ITALIC 0x02
#define UNDERLINE 0x04
#define FLASH 0x08
#define INVERSE 0x10
LC0: .word bytes_per_char_h
.word video_size_row
.word acorndata_8x8
.word con_charconvtable
ENTRY(ll_write_char)
stmfd sp!, {r4 - r7, lr}
@
@ Smashable regs: {r0 - r3}, [r4 - r7], (r8 - fp), [ip], (sp), [lr], (pc)
@
eor ip, r1, #UNDERLINE << 9
/*
* calculate colours
*/
tst r1, #INVERSE << 9
moveq r2, r1, lsr #16
moveq r3, r1, lsr #24
movne r2, r1, lsr #24
movne r3, r1, lsr #16
and r3, r3, #255
and r2, r2, #255
/*
* calculate offset into character table
*/
mov r1, r1, lsl #23
mov r1, r1, lsr #20
/*
* calculate offset required for each row [maybe I should make this an argument to this fn.
* Have to see what the register usage is like in the calling routines.
*/
adr r4, LC0
ldmia r4, {r4, r5, r6, lr}
ldr r4, [r4]
ldr r5, [r5]
/*
* Go to resolution-dependent routine...
*/
cmp r4, #4
blt Lrow1bpp
eor r2, r3, r2 @ Create eor mask to change colour from bg
orr r3, r3, r3, lsl #8 @ to fg.
orr r3, r3, r3, lsl #16
add r0, r0, r5, lsl #3 @ Move to bottom of character
add r1, r1, #7
ldrb r7, [r6, r1]
tst ip, #UNDERLINE << 9
eoreq r7, r7, #255
teq r4, #8
beq Lrow8bpplp
@
@ Smashable regs: {r0 - r3}, [r4], {r5 - r7}, (r8 - fp), [ip], (sp), {lr}, (pc)
@
orr r3, r3, r3, lsl #4
Lrow4bpplp: ldr r7, [lr, r7, lsl #2]
mul r7, r2, r7
tst r1, #7 @ avoid using r7 directly after
eor ip, r3, r7
str ip, [r0, -r5]!
LOADREGS(eqfd, sp!, {r4 - r7, pc})
sub r1, r1, #1
ldrb r7, [r6, r1]
ldr r7, [lr, r7, lsl #2]
mul r7, r2, r7
tst r1, #7 @ avoid using r7 directly after
eor ip, r3, r7
str ip, [r0, -r5]!
subne r1, r1, #1
ldrneb r7, [r6, r1]
bne Lrow4bpplp
LOADREGS(fd, sp!, {r4 - r7, pc})
@
@ Smashable regs: {r0 - r3}, [r4], {r5 - r7}, (r8 - fp), [ip], (sp), {lr}, (pc)
@
Lrow8bpplp: mov ip, r7, lsr #4
ldr ip, [lr, ip, lsl #2]
mul r4, r2, ip
and ip, r7, #15 @ avoid r4
ldr ip, [lr, ip, lsl #2] @ avoid r4
mul ip, r2, ip @ avoid r4
eor r4, r3, r4 @ avoid ip
tst r1, #7 @ avoid ip
sub r0, r0, r5 @ avoid ip
eor ip, r3, ip
stmia r0, {r4, ip}
LOADREGS(eqfd, sp!, {r4 - r7, pc})
sub r1, r1, #1
ldrb r7, [r6, r1]
mov ip, r7, lsr #4
ldr ip, [lr, ip, lsl #2]
mul r4, r2, ip
and ip, r7, #15 @ avoid r4
ldr ip, [lr, ip, lsl #2] @ avoid r4
mul ip, r2, ip @ avoid r4
eor r4, r3, r4 @ avoid ip
tst r1, #7 @ avoid ip
sub r0, r0, r5 @ avoid ip
eor ip, r3, ip
stmia r0, {r4, ip}
subne r1, r1, #1
ldrneb r7, [r6, r1]
bne Lrow8bpplp
LOADREGS(fd, sp!, {r4 - r7, pc})
@
@ Smashable regs: {r0 - r3}, [r4], {r5, r6}, [r7], (r8 - fp), [ip], (sp), [lr], (pc)
@
Lrow1bpp: add r6, r6, r1
ldmia r6, {r4, r7}
tst ip, #INVERSE << 9
mvnne r4, r4
mvnne r7, r7
strb r4, [r0], r5
mov r4, r4, lsr #8
strb r4, [r0], r5
mov r4, r4, lsr #8
strb r4, [r0], r5
mov r4, r4, lsr #8
strb r4, [r0], r5
strb r7, [r0], r5
mov r7, r7, lsr #8
strb r7, [r0], r5
mov r7, r7, lsr #8
strb r7, [r0], r5
mov r7, r7, lsr #8
tst ip, #UNDERLINE << 9
mvneq r7, r7
strb r7, [r0], r5
LOADREGS(fd, sp!, {r4 - r7, pc})
.bss
ENTRY(con_charconvtable)
.space 1024

316
arch/arm26/boot/compressed/misc.c
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@ -1,316 +0,0 @@
/*
* misc.c
*
* This is a collection of several routines from gzip-1.0.3
* adapted for Linux.
*
* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
*
* Modified for ARM Linux by Russell King
*
* Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
* For this code to run directly from Flash, all constant variables must
* be marked with 'const' and all other variables initialized at run-time
* only. This way all non constant variables will end up in the bss segment,
* which should point to addresses in RAM and cleared to 0 on start.
* This allows for a much quicker boot time.
*/
unsigned int __machine_arch_type;
#include <linux/kernel.h>
#include <asm/uaccess.h>
#include "uncompress.h"
#ifdef STANDALONE_DEBUG
#define puts printf
#endif
#define __ptr_t void *
/*
* Optimised C version of memzero for the ARM.
*/
void __memzero (__ptr_t s, size_t n)
{
union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;
int i;
u.vp = s;
for (i = n >> 5; i > 0; i--) {
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
}
if (n & 1 << 4) {
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
*u.ulp++ = 0;
}
if (n & 1 << 3) {
*u.ulp++ = 0;
*u.ulp++ = 0;
}
if (n & 1 << 2)
*u.ulp++ = 0;
if (n & 1 << 1) {
*u.ucp++ = 0;
*u.ucp++ = 0;
}
if (n & 1)
*u.ucp++ = 0;
}
static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
size_t __n)
{
int i = 0;
unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
for (i = __n >> 3; i > 0; i--) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
}
if (__n & 1 << 2) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
}
if (__n & 1 << 1) {
*d++ = *s++;
*d++ = *s++;
}
if (__n & 1)
*d++ = *s++;
return __dest;
}
/*
* gzip delarations
*/
#define OF(args) args
#define STATIC static
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
#define WSIZE 0x8000 /* Window size must be at least 32k, */
/* and a power of two */
static uch *inbuf; /* input buffer */
static uch window[WSIZE]; /* Sliding window buffer */
static unsigned insize; /* valid bytes in inbuf */
static unsigned inptr; /* index of next byte to be processed in inbuf */
static unsigned outcnt; /* bytes in output buffer */
/* gzip flag byte */
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
#define COMMENT 0x10 /* bit 4 set: file comment present */
#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
#define RESERVED 0xC0 /* bit 6,7: reserved */
#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
/* Diagnostic functions */
#ifdef DEBUG
# define Assert(cond,msg) {if(!(cond)) error(msg);}
# define Trace(x) fprintf x
# define Tracev(x) {if (verbose) fprintf x ;}
# define Tracevv(x) {if (verbose>1) fprintf x ;}
# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
#else
# define Assert(cond,msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c,x)
# define Tracecv(c,x)
#endif
static int fill_inbuf(void);
static void flush_window(void);
static void error(char *m);
static void gzip_mark(void **);
static void gzip_release(void **);
extern char input_data[];
extern char input_data_end[];
static uch *output_data;
static ulg output_ptr;
static ulg bytes_out;
static void *malloc(int size);
static void free(void *where);
static void error(char *m);
static void gzip_mark(void **);
static void gzip_release(void **);
static void puts(const char *);
extern int end;
static ulg free_mem_ptr;
static ulg free_mem_ptr_end;
#define HEAP_SIZE 0x3000
#include "../../../../lib/inflate.c"
#ifndef STANDALONE_DEBUG
static void *malloc(int size)
{
void *p;
if (size <0) error("Malloc error");
if (free_mem_ptr <= 0) error("Memory error");
free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
p = (void *)free_mem_ptr;
free_mem_ptr += size;
if (free_mem_ptr >= free_mem_ptr_end)
error("Out of memory");
return p;
}
static void free(void *where)
{ /* gzip_mark & gzip_release do the free */
}
static void gzip_mark(void **ptr)
{
arch_decomp_wdog();
*ptr = (void *) free_mem_ptr;
}
static void gzip_release(void **ptr)
{
arch_decomp_wdog();
free_mem_ptr = (long) *ptr;
}
#else
static void gzip_mark(void **ptr)
{
}
static void gzip_release(void **ptr)
{
}
#endif
/* ===========================================================================
* Fill the input buffer. This is called only when the buffer is empty
* and at least one byte is really needed.
*/
int fill_inbuf(void)
{
if (insize != 0)
error("ran out of input data");
inbuf = input_data;
insize = &input_data_end[0] - &input_data[0];
inptr = 1;
return inbuf[0];
}
/* ===========================================================================
* Write the output window window[0..outcnt-1] and update crc and bytes_out.
* (Used for the decompressed data only.)
*/
void flush_window(void)
{
ulg c = crc;
unsigned n;
uch *in, *out, ch;
in = window;
out = &output_data[output_ptr];
for (n = 0; n < outcnt; n++) {
ch = *out++ = *in++;
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
}
crc = c;
bytes_out += (ulg)outcnt;
output_ptr += (ulg)outcnt;
outcnt = 0;
puts(".");
}
static void error(char *x)
{
int ptr;
puts("\n\n");
puts(x);
puts("\n\n -- System halted");
while(1); /* Halt */
}
#ifndef STANDALONE_DEBUG
ulg
decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
int arch_id)
{
output_data = (uch *)output_start; /* Points to kernel start */
free_mem_ptr = free_mem_ptr_p;
free_mem_ptr_end = free_mem_ptr_end_p;
__machine_arch_type = arch_id;
arch_decomp_setup();
makecrc();
puts("Uncompressing Linux...");
gunzip();
puts(" done, booting the kernel.\n");
return output_ptr;
}
#else
char output_buffer[1500*1024];
int main()
{
output_data = output_buffer;
makecrc();
puts("Uncompressing Linux...");
gunzip();
puts("done.\n");
return 0;
}
#endif

110
arch/arm26/boot/compressed/uncompress.h
View File

@ -1,110 +0,0 @@
/*
*
* Copyright (C) 1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define VIDMEM ((char *)0x02000000)
int video_num_columns, video_num_lines, video_size_row;
int white, bytes_per_char_h;
extern unsigned long con_charconvtable[256];
struct param_struct {
unsigned long page_size;
unsigned long nr_pages;
unsigned long ramdisk_size;
unsigned long mountrootrdonly;
unsigned long rootdev;
unsigned long video_num_cols;
unsigned long video_num_rows;
unsigned long video_x;
unsigned long video_y;
unsigned long memc_control_reg;
unsigned char sounddefault;
unsigned char adfsdrives;
unsigned char bytes_per_char_h;
unsigned char bytes_per_char_v;
unsigned long unused[256/4-11];
};
static struct param_struct *params = (struct param_struct *)0x0207c000;
/*
* This does not append a newline
*/
static void puts(const char *s)
{
extern void ll_write_char(char *, unsigned long);
int x,y;
unsigned char c;
char *ptr;
x = params->video_x;
y = params->video_y;
while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
if ( c == '\n' ) {
x = 0;
if ( ++y >= video_num_lines ) {
y--;
}
} else {
ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
ll_write_char(ptr, c|(white<<16));
if ( ++x >= video_num_columns ) {
x = 0;
if ( ++y >= video_num_lines ) {
y--;
}
}
}
}
params->video_x = x;
params->video_y = y;
}
static void error(char *x);
/*
* Setup for decompression
*/
static void arch_decomp_setup(void)
{
int i;
video_num_lines = params->video_num_rows;
video_num_columns = params->video_num_cols;
bytes_per_char_h = params->bytes_per_char_h;
video_size_row = video_num_columns * bytes_per_char_h;
if (bytes_per_char_h == 4)
for (i = 0; i < 256; i++)
con_charconvtable[i] =
(i & 128 ? 1 << 0 : 0) |
(i & 64 ? 1 << 4 : 0) |
(i & 32 ? 1 << 8 : 0) |
(i & 16 ? 1 << 12 : 0) |
(i & 8 ? 1 << 16 : 0) |
(i & 4 ? 1 << 20 : 0) |
(i & 2 ? 1 << 24 : 0) |
(i & 1 ? 1 << 28 : 0);
else
for (i = 0; i < 16; i++)
con_charconvtable[i] =
(i & 8 ? 1 << 0 : 0) |
(i & 4 ? 1 << 8 : 0) |
(i & 2 ? 1 << 16 : 0) |
(i & 1 ? 1 << 24 : 0);
white = bytes_per_char_h == 8 ? 0xfc : 7;
if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
}
/*
* nothing to do
*/
#define arch_decomp_wdog()

60
arch/arm26/boot/compressed/vmlinux.lds.in
View File

@ -1,60 +0,0 @@
/*
* linux/arch/arm26/boot/compressed/vmlinux.lds.in
*
* Copyright (C) 2000 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
. = LOAD_ADDR;
_load_addr = .;
. = TEXT_START;
_text = .;
.text : {
_start = .;
*(.start)
*(.text)
*(.fixup)
*(.gnu.warning)
*(.rodata)
*(.rodata.*)
*(.glue_7)
*(.glue_7t)
input_data = .;
arch/arm26/boot/compressed/piggy.o
input_data_end = .;
. = ALIGN(4);
}
_etext = .;
_got_start = .;
.got : { *(.got) }
_got_end = .;
.got.plt : { *(.got.plt) }
.data : { *(.data) }
_edata = .;
. = BSS_START;
__bss_start = .;
.bss : { *(.bss) }
_end = .;
.stack (NOLOAD) : { *(.stack) }
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
}

62
arch/arm26/boot/install.sh
View File

@ -1,62 +0,0 @@
#!/bin/sh
#
# arch/arm26/boot/install.sh
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995 by Linus Torvalds
#
# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
# Adapted from code in arch/i386/boot/install.sh by Russell King
# Stolen from arm32 by Ian Molton
#
# "make install" script for arm architecture
#
# Arguments:
# $1 - kernel version
# $2 - kernel image file
# $3 - kernel map file
# $4 - default install path (blank if root directory)
#
# User may have a custom install script
if [ -x /sbin/${CROSS_COMPILE}installkernel ]; then
exec /sbin/${CROSS_COMPILE}installkernel "$@"
fi
if [ "$2" = "zImage" ]; then
# Compressed install
echo "Installing compressed kernel"
if [ -f $4/vmlinuz-$1 ]; then
mv $4/vmlinuz-$1 $4/vmlinuz.old
fi
if [ -f $4/System.map-$1 ]; then
mv $4/System.map-$1 $4/System.old
fi
cat $2 > $4/vmlinuz-$1
cp $3 $4/System.map-$1
else
# Normal install
echo "Installing normal kernel"
if [ -f $4/vmlinux-$1 ]; then
mv $4/vmlinux-$1 $4/vmlinux.old
fi
if [ -f $4/System.map ]; then
mv $4/System.map $4/System.old
fi
cat $2 > $4/vmlinux-$1
cp $3 $4/System.map
fi
if [ -x /sbin/loadmap ]; then
/sbin/loadmap --rdev /dev/ima
else
echo "You have to install it yourself"
fi

361
arch/arm26/defconfig
View File

@ -1,361 +0,0 @@
#
# Automatically generated by make menuconfig: don't edit
#
CONFIG_ARM=y
# CONFIG_EISA is not set
# CONFIG_SBUS is not set
# CONFIG_MCA is not set
CONFIG_UID16=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_GENERIC_BUST_SPINLOCK is not set
# CONFIG_GENERIC_ISA_DMA is not set
#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
#
# General setup
#
# CONFIG_NET is not set
# CONFIG_SYSVIPC is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_SYSCTL is not set
#
# Loadable module support
#
# CONFIG_MODULES is not set
#
# System Type
#
CONFIG_ARCH_ARC=y
# CONFIG_ARCH_A5K is not set
CONFIG_ARCH_ACORN=y
# CONFIG_CPU_32 is not set
CONFIG_CPU_26=y
# CONFIG_PAGESIZE_16 is not set
#
# General setup
#
CONFIG_FIQ=y
# CONFIG_ZBOOT_ROM is not set
CONFIG_ZBOOT_ROM_TEXT=0
CONFIG_ZBOOT_ROM_BSS=0
CONFIG_FPE_NWFPE=y
CONFIG_KCORE_ELF=y
# CONFIG_KCORE_AOUT is not set
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_ELF is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_CMDLINE=""
# CONFIG_ALIGNMENT_TRAP is not set
#
# Parallel port support
#
# CONFIG_PARPORT is not set
#
# Plug and Play configuration
#
# CONFIG_PNP is not set
# CONFIG_ISAPNP is not set
# CONFIG_PNPBIOS is not set
#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_DEV_XD is not set
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_CISS_SCSI_TAPE is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_BLK_DEV_INITRD is not set
#
# Multi-device support (RAID and LVM)
#
# CONFIG_MD is not set
# CONFIG_BLK_DEV_MD is not set
# CONFIG_MD_LINEAR is not set
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
# CONFIG_MD_RAID5 is not set
# CONFIG_MD_MULTIPATH is not set
# CONFIG_BLK_DEV_LVM is not set
#
# Acorn-specific block devices
#
# CONFIG_BLK_DEV_FD1772 is not set
# CONFIG_BLK_DEV_MFM is not set
#
# ATA/ATAPI/MFM/RLL support
#
# CONFIG_IDE is not set
# CONFIG_BLK_DEV_HD is not set
#
# SCSI support
#
# CONFIG_SCSI is not set
#
# ISDN subsystem
#
#
# Input device support
#
# CONFIG_INPUT is not set
# CONFIG_INPUT_KEYBDEV is not set
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_TSDEV is not set
# CONFIG_INPUT_TSLIBDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set
# CONFIG_INPUT_UINPUT is not set
# CONFIG_GAMEPORT is not set
CONFIG_SOUND_GAMEPORT=y
# CONFIG_GAMEPORT_NS558 is not set
# CONFIG_GAMEPORT_L4 is not set
# CONFIG_GAMEPORT_EMU10K1 is not set
# CONFIG_GAMEPORT_VORTEX is not set
# CONFIG_GAMEPORT_FM801 is not set
# CONFIG_GAMEPORT_CS461x is not set
# CONFIG_SERIO is not set
# CONFIG_SERIO_I8042 is not set
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
# CONFIG_SERIO_ACORN is not set
#
# Character devices
#
# CONFIG_VT is not set
# CONFIG_SERIAL_NONSTANDARD is not set
#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
# CONFIG_SERIAL_8250_CONSOLE is not set
# CONFIG_SERIAL_8250_CS is not set
# CONFIG_SERIAL_8250_EXTENDED is not set
# CONFIG_SERIAL_8250_MANY_PORTS is not set
# CONFIG_SERIAL_8250_SHARE_IRQ is not set
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
# CONFIG_SERIAL_8250_MULTIPORT is not set
# CONFIG_SERIAL_8250_RSA is not set
# CONFIG_ATOMWIDE_SERIAL is not set
# CONFIG_DUALSP_SERIAL is not set
# CONFIG_SERIAL_AMBA is not set
# CONFIG_SERIAL_AMBA_CONSOLE is not set
# CONFIG_SERIAL_CLPS711X is not set
# CONFIG_SERIAL_CLPS711X_CONSOLE is not set
# CONFIG_SERIAL_CLPS711X_OLD_NAME is not set
# CONFIG_SERIAL_21285 is not set
# CONFIG_SERIAL_21285_OLD is not set
# CONFIG_SERIAL_21285_CONSOLE is not set
# CONFIG_SERIAL_UART00 is not set
# CONFIG_SERIAL_UART00_CONSOLE is not set
# CONFIG_SERIAL_SA1100 is not set
# CONFIG_SERIAL_SA1100_CONSOLE is not set
# CONFIG_UNIX98_PTYS is not set
#
# I2C support
#
CONFIG_I2C=y
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ALGOPCF=y
# CONFIG_I2C_ELEKTOR is not set
CONFIG_I2C_CHARDEV=y
# CONFIG_I2C_PROC is not set
#
# L3 serial bus support
#
# CONFIG_L3 is not set
# CONFIG_L3_ALGOBIT is not set
# CONFIG_L3_BIT_SA1100_GPIO is not set
# CONFIG_L3_SA1111 is not set
# CONFIG_BIT_SA1100_GPIO is not set
#
# Mice
#
# CONFIG_BUSMOUSE is not set
# CONFIG_PSMOUSE is not set
# CONFIG_QIC02_TAPE is not set
#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_NVRAM is not set
# CONFIG_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
# CONFIG_AGP is not set
# CONFIG_DRM is not set
# CONFIG_RAW_DRIVER is not set
#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
#
# File systems
#
# CONFIG_QUOTA is not set
# CONFIG_QFMT_V1 is not set
# CONFIG_QFMT_V2 is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_ADFS_FS is not set
# CONFIG_ADFS_FS_RW is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_JBD is not set
# CONFIG_JBD_DEBUG is not set
# CONFIG_FAT_FS is not set
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_JFFS_FS is not set
# CONFIG_JFFS2_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_TMPFS is not set
CONFIG_RAMFS=y
# CONFIG_ISO9660_FS is not set
# CONFIG_JOLIET is not set
# CONFIG_ZISOFS is not set
# CONFIG_JFS_FS is not set
# CONFIG_JFS_DEBUG is not set
# CONFIG_JFS_STATISTICS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS_DEBUG is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVFS_MOUNT is not set
# CONFIG_DEVFS_DEBUG is not set
# CONFIG_DEVPTS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX4FS_RW is not set
# CONFIG_ROMFS_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UDF_FS is not set
# CONFIG_UDF_RW is not set
# CONFIG_UFS_FS is not set
# CONFIG_UFS_FS_WRITE is not set
# CONFIG_NCPFS_NLS is not set
# CONFIG_SMB_FS is not set
# CONFIG_ZISOFS_FS is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
CONFIG_ACORN_PARTITION=y
# CONFIG_ACORN_PARTITION_EESOX is not set
# CONFIG_ACORN_PARTITION_ICS is not set
CONFIG_ACORN_PARTITION_ADFS=y
# CONFIG_ACORN_PARTITION_POWERTEC is not set
CONFIG_ACORN_PARTITION_RISCIX=y
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
# CONFIG_MSDOS_PARTITION is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SMB_NLS is not set
# CONFIG_NLS is not set
#
# Sound
#
# CONFIG_SOUND is not set
#
# Multimedia Capabilities Port drivers
#
# CONFIG_MCP is not set
# CONFIG_MCP_SA1100 is not set
# CONFIG_MCP_UCB1200 is not set
# CONFIG_MCP_UCB1200_AUDIO is not set
# CONFIG_MCP_UCB1200_TS is not set
#
# Console Switches
#
# CONFIG_SWITCHES is not set
# CONFIG_SWITCHES_SA1100 is not set
# CONFIG_SWITCHES_UCB1X00 is not set
#
# USB support
#
# CONFIG_USB is not set
#
# Kernel hacking
#
# CONFIG_NO_FRAME_POINTER is not set
CONFIG_DEBUG_USER=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_SLAB=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_WAITQ=y
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_ERRORS=y
CONFIG_DEBUG_LL=y
#
# Security options
#
CONFIG_SECURITY_CAPABILITIES=y
#
# Library routines
#
CONFIG_CRC32=y
# CONFIG_ZLIB_INFLATE is not set
# CONFIG_ZLIB_DEFLATE is not set

17
arch/arm26/kernel/Makefile
View File

@ -1,17 +0,0 @@
#
# Makefile for the linux kernel.
#
# Object file lists.
AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR)
obj-y := compat.o dma.o entry.o irq.o process.o ptrace.o \
semaphore.o setup.o signal.o sys_arm.o time.o traps.o \
ecard.o dma.o ecard.o fiq.o time.o
extra-y := head.o init_task.o vmlinux.lds
obj-$(CONFIG_FIQ) += fiq.o
obj-$(CONFIG_MODULES) += armksyms.o

204
arch/arm26/kernel/armksyms.c
View File

@ -1,204 +0,0 @@
/*
* linux/arch/arm26/kernel/armksyms.c
*
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/module.h>
#include <linux/user.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/delay.h>
#include <linux/in6.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/tty.h>
#include <linux/vt_kern.h>
#include <linux/syscalls.h>
#include <asm/byteorder.h>
#include <asm/elf.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/processor.h>
#include <asm/semaphore.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
#include <asm/mach-types.h>
extern int dump_fpu(struct pt_regs *, struct user_fp_struct *);
extern void inswb(unsigned int port, void *to, int len);
extern void outswb(unsigned int port, const void *to, int len);
extern void __bad_xchg(volatile void *ptr, int size);
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
* doesn't really matter since they're not versioned).
*/
extern void __ashldi3(void);
extern void __ashrdi3(void);
extern void __divsi3(void);
extern void __lshrdi3(void);
extern void __modsi3(void);
extern void __muldi3(void);
extern void __ucmpdi2(void);
extern void __udivdi3(void);
extern void __umoddi3(void);
extern void __udivmoddi4(void);
extern void __udivsi3(void);
extern void __umodsi3(void);
extern void abort(void);
extern void ret_from_exception(void);
extern void fpundefinstr(void);
extern void fp_enter(void);
/*
* This has a special calling convention; it doesn't
* modify any of the usual registers, except for LR.
* FIXME - we used to use our own local version - looks to be in kernel/softirq now
*/
//extern void __do_softirq(void);
#define EXPORT_SYMBOL_ALIAS(sym,orig) \
const char __kstrtab_##sym[] \
__attribute__((section(".kstrtab"))) = \
__MODULE_STRING(sym); \
const struct module_symbol __ksymtab_##sym \
__attribute__((section("__ksymtab"))) = \
{ (unsigned long)&orig, __kstrtab_##sym };
/*
* floating point math emulator support.
* These symbols will never change their calling convention...
*/
EXPORT_SYMBOL_ALIAS(kern_fp_enter,fp_enter);
EXPORT_SYMBOL_ALIAS(fp_printk,printk);
EXPORT_SYMBOL_ALIAS(fp_send_sig,send_sig);
EXPORT_SYMBOL(fpundefinstr);
EXPORT_SYMBOL(ret_from_exception);
#ifdef CONFIG_VT
EXPORT_SYMBOL(kd_mksound);
#endif
//EXPORT_SYMBOL(__do_softirq);
/* platform dependent support */
EXPORT_SYMBOL(dump_thread);
EXPORT_SYMBOL(dump_fpu);
EXPORT_SYMBOL(udelay);
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(system_rev);
EXPORT_SYMBOL(system_serial_low);
EXPORT_SYMBOL(system_serial_high);
#ifdef CONFIG_DEBUG_BUGVERBOSE
EXPORT_SYMBOL(__bug);
#endif
EXPORT_SYMBOL(__bad_xchg);
EXPORT_SYMBOL(__readwrite_bug);
EXPORT_SYMBOL(set_irq_type);
EXPORT_SYMBOL(pm_idle);
EXPORT_SYMBOL(pm_power_off);
/* processor dependencies */
EXPORT_SYMBOL(__machine_arch_type);
/* networking */
EXPORT_SYMBOL(csum_partial_copy_nocheck);
EXPORT_SYMBOL(__csum_ipv6_magic);
/* io */
#ifndef __raw_readsb
EXPORT_SYMBOL(__raw_readsb);
#endif
#ifndef __raw_readsw
EXPORT_SYMBOL(__raw_readsw);
#endif
#ifndef __raw_readsl
EXPORT_SYMBOL(__raw_readsl);
#endif
#ifndef __raw_writesb
EXPORT_SYMBOL(__raw_writesb);
#endif
#ifndef __raw_writesw
EXPORT_SYMBOL(__raw_writesw);
#endif
#ifndef __raw_writesl
EXPORT_SYMBOL(__raw_writesl);
#endif
/* string / mem functions */
EXPORT_SYMBOL(strcpy);
EXPORT_SYMBOL(strncpy);
EXPORT_SYMBOL(strcat);
EXPORT_SYMBOL(strncat);
EXPORT_SYMBOL(strcmp);
EXPORT_SYMBOL(strncmp);
EXPORT_SYMBOL(strchr);
EXPORT_SYMBOL(strlen);
EXPORT_SYMBOL(strnlen);
EXPORT_SYMBOL(strrchr);
EXPORT_SYMBOL(strstr);
EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(memcmp);
EXPORT_SYMBOL(memscan);
EXPORT_SYMBOL(__memzero);
/* user mem (segment) */
EXPORT_SYMBOL(uaccess_kernel);
EXPORT_SYMBOL(uaccess_user);
EXPORT_SYMBOL(__get_user_1);
EXPORT_SYMBOL(__get_user_2);
EXPORT_SYMBOL(__get_user_4);
EXPORT_SYMBOL(__get_user_8);
EXPORT_SYMBOL(__put_user_1);
EXPORT_SYMBOL(__put_user_2);
EXPORT_SYMBOL(__put_user_4);
EXPORT_SYMBOL(__put_user_8);
/* gcc lib functions */
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__divsi3);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__modsi3);
EXPORT_SYMBOL(__muldi3);
EXPORT_SYMBOL(__ucmpdi2);
EXPORT_SYMBOL(__udivdi3);
EXPORT_SYMBOL(__umoddi3);
EXPORT_SYMBOL(__udivmoddi4);
EXPORT_SYMBOL(__udivsi3);
EXPORT_SYMBOL(__umodsi3);
/* bitops */
EXPORT_SYMBOL(_set_bit_le);
EXPORT_SYMBOL(_test_and_set_bit_le);
EXPORT_SYMBOL(_clear_bit_le);
EXPORT_SYMBOL(_test_and_clear_bit_le);
EXPORT_SYMBOL(_change_bit_le);
EXPORT_SYMBOL(_test_and_change_bit_le);
EXPORT_SYMBOL(_find_first_zero_bit_le);
EXPORT_SYMBOL(_find_next_zero_bit_le);
/* elf */
EXPORT_SYMBOL(elf_platform);
EXPORT_SYMBOL(elf_hwcap);
#ifdef CONFIG_PREEMPT
EXPORT_SYMBOL(kernel_flag);
#endif

55
arch/arm26/kernel/asm-offsets.c
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@ -1,55 +0,0 @@
/*
* Copyright (C) 1995-2001 Russell King
* 2001-2002 Keith Owens
* 2003 Ian Molton
*
* Generate definitions needed by assembly language modules.
* This code generates raw asm output which is post-processed to extract
* and format the required data.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
/*
* Make sure that the compiler and target are compatible.
*/
#if defined(__APCS_32__) && defined(CONFIG_CPU_26)
#error Sorry, your compiler targets APCS-32 but this kernel requires APCS-26
#endif
/* Use marker if you need to separate the values later */
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
#define BLANK() asm volatile("\n->" : : )
int main(void)
{
DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
BLANK();
DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
BLANK();
DEFINE(VM_EXEC, VM_EXEC);
BLANK();
BLANK();
DEFINE(PAGE_PRESENT, _PAGE_PRESENT);
DEFINE(PAGE_READONLY, _PAGE_READONLY);
DEFINE(PAGE_NOT_USER, _PAGE_NOT_USER);
DEFINE(PAGE_OLD, _PAGE_OLD);
DEFINE(PAGE_CLEAN, _PAGE_CLEAN);
BLANK();
DEFINE(PAGE_SZ, PAGE_SIZE);
BLANK();
DEFINE(SYS_ERROR0, 0x9f0000);
return 0;
}

265
arch/arm26/kernel/calls.S
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@ -1,265 +0,0 @@
/*
* linux/arch/arm26/kernel/calls.S
*
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* FIXME
* This file is included twice in entry.S which may not be necessary
*/
//FIXME - clearly NR_syscalls is never defined here
#ifndef NR_syscalls
#define NR_syscalls 256
#else
__syscall_start:
/* 0 */ .long sys_ni_syscall
.long sys_exit
.long sys_fork_wrapper
.long sys_read
.long sys_write
/* 5 */ .long sys_open
.long sys_close
.long sys_ni_syscall /* was sys_waitpid */
.long sys_creat
.long sys_link
/* 10 */ .long sys_unlink
.long sys_execve_wrapper
.long sys_chdir
.long sys_time /* used by libc4 */
.long sys_mknod
/* 15 */ .long sys_chmod
.long sys_lchown16
.long sys_ni_syscall /* was sys_break */
.long sys_ni_syscall /* was sys_stat */
.long sys_lseek
/* 20 */ .long sys_getpid
.long sys_mount
.long sys_oldumount /* used by libc4 */
.long sys_setuid16
.long sys_getuid16
/* 25 */ .long sys_stime
.long sys_ptrace
.long sys_alarm /* used by libc4 */
.long sys_ni_syscall /* was sys_fstat */
.long sys_pause
/* 30 */ .long sys_utime /* used by libc4 */
.long sys_ni_syscall /* was sys_stty */
.long sys_ni_syscall /* was sys_getty */
.long sys_access
.long sys_nice
/* 35 */ .long sys_ni_syscall /* was sys_ftime */
.long sys_sync
.long sys_kill
.long sys_rename
.long sys_mkdir
/* 40 */ .long sys_rmdir
.long sys_dup
.long sys_pipe
.long sys_times
.long sys_ni_syscall /* was sys_prof */
/* 45 */ .long sys_brk
.long sys_setgid16
.long sys_getgid16
.long sys_ni_syscall /* was sys_signal */
.long sys_geteuid16
/* 50 */ .long sys_getegid16
.long sys_acct
.long sys_umount
.long sys_ni_syscall /* was sys_lock */
.long sys_ioctl
/* 55 */ .long sys_fcntl
.long sys_ni_syscall /* was sys_mpx */
.long sys_setpgid
.long sys_ni_syscall /* was sys_ulimit */
.long sys_ni_syscall /* was sys_olduname */
/* 60 */ .long sys_umask
.long sys_chroot
.long sys_ustat
.long sys_dup2
.long sys_getppid
/* 65 */ .long sys_getpgrp
.long sys_setsid
.long sys_sigaction
.long sys_ni_syscall /* was sys_sgetmask */
.long sys_ni_syscall /* was sys_ssetmask */
/* 70 */ .long sys_setreuid16
.long sys_setregid16
.long sys_sigsuspend_wrapper
.long sys_sigpending
.long sys_sethostname
/* 75 */ .long sys_setrlimit
.long sys_old_getrlimit /* used by libc4 */
.long sys_getrusage
.long sys_gettimeofday
.long sys_settimeofday
/* 80 */ .long sys_getgroups16
.long sys_setgroups16
.long old_select /* used by libc4 */
.long sys_symlink
.long sys_ni_syscall /* was sys_lstat */
/* 85 */ .long sys_readlink
.long sys_uselib
.long sys_swapon
.long sys_reboot
.long old_readdir /* used by libc4 */
/* 90 */ .long old_mmap /* used by libc4 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
.long sys_fchmod
/* 95 */ .long sys_fchown16
.long sys_getpriority
.long sys_setpriority
.long sys_ni_syscall /* was sys_profil */
.long sys_statfs
/* 100 */ .long sys_fstatfs
.long sys_ni_syscall
.long sys_socketcall
.long sys_syslog
.long sys_setitimer
/* 105 */ .long sys_getitimer
.long sys_newstat
.long sys_newlstat
.long sys_newfstat
.long sys_ni_syscall /* was sys_uname */
/* 110 */ .long sys_ni_syscall /* was sys_iopl */
.long sys_vhangup
.long sys_ni_syscall
.long sys_syscall /* call a syscall */
.long sys_wait4
/* 115 */ .long sys_swapoff
.long sys_sysinfo
.long sys_ipc
.long sys_fsync
.long sys_sigreturn_wrapper
/* 120 */ .long sys_clone_wapper
.long sys_setdomainname
.long sys_newuname
.long sys_ni_syscall
.long sys_adjtimex
/* 125 */ .long sys_mprotect
.long sys_sigprocmask
.long sys_ni_syscall /* WAS: sys_create_module */
.long sys_init_module
.long sys_delete_module
/* 130 */ .long sys_ni_syscall /* WAS: sys_get_kernel_syms */
.long sys_quotactl
.long sys_getpgid
.long sys_fchdir
.long sys_bdflush
/* 135 */ .long sys_sysfs
.long sys_personality
.long sys_ni_syscall /* .long _sys_afs_syscall */
.long sys_setfsuid16
.long sys_setfsgid16
/* 140 */ .long sys_llseek
.long sys_getdents
.long sys_select
.long sys_flock
.long sys_msync
/* 145 */ .long sys_readv
.long sys_writev
.long sys_getsid
.long sys_fdatasync
.long sys_sysctl
/* 150 */ .long sys_mlock
.long sys_munlock
.long sys_mlockall
.long sys_munlockall
.long sys_sched_setparam
/* 155 */ .long sys_sched_getparam
.long sys_sched_setscheduler
.long sys_sched_getscheduler
.long sys_sched_yield
.long sys_sched_get_priority_max
/* 160 */ .long sys_sched_get_priority_min
.long sys_sched_rr_get_interval
.long sys_nanosleep
.long sys_arm_mremap
.long sys_setresuid16
/* 165 */ .long sys_getresuid16
.long sys_ni_syscall
.long sys_ni_syscall /* WAS: sys_query_module */
.long sys_poll
.long sys_nfsservctl
/* 170 */ .long sys_setresgid16
.long sys_getresgid16
.long sys_prctl
.long sys_rt_sigreturn_wrapper
.long sys_rt_sigaction
/* 175 */ .long sys_rt_sigprocmask
.long sys_rt_sigpending
.long sys_rt_sigtimedwait
.long sys_rt_sigqueueinfo
.long sys_rt_sigsuspend_wrapper
/* 180 */ .long sys_pread64
.long sys_pwrite64
.long sys_chown16
.long sys_getcwd
.long sys_capget
/* 185 */ .long sys_capset
.long sys_sigaltstack_wrapper
.long sys_sendfile
.long sys_ni_syscall
.long sys_ni_syscall
/* 190 */ .long sys_vfork_wrapper
.long sys_getrlimit
.long sys_mmap2
.long sys_truncate64
.long sys_ftruncate64
/* 195 */ .long sys_stat64
.long sys_lstat64
.long sys_fstat64
.long sys_lchown
.long sys_getuid
/* 200 */ .long sys_getgid
.long sys_geteuid
.long sys_getegid
.long sys_setreuid
.long sys_setregid
/* 205 */ .long sys_getgroups
.long sys_setgroups
.long sys_fchown
.long sys_setresuid
.long sys_getresuid
/* 210 */ .long sys_setresgid
.long sys_getresgid
.long sys_chown
.long sys_setuid
.long sys_setgid
/* 215 */ .long sys_setfsuid
.long sys_setfsgid
.long sys_getdents64
.long sys_pivot_root
.long sys_mincore
/* 220 */ .long sys_madvise
.long sys_fcntl64
.long sys_ni_syscall /* TUX */
.long sys_ni_syscall /* WAS: sys_security */
.long sys_gettid
/* 225 */ .long sys_readahead
.long sys_setxattr
.long sys_lsetxattr
.long sys_fsetxattr
.long sys_getxattr
/* 230 */ .long sys_lgetxattr
.long sys_fgetxattr
.long sys_listxattr
.long sys_llistxattr
.long sys_flistxattr
/* 235 */ .long sys_removexattr
.long sys_lremovexattr
.long sys_fremovexattr
.long sys_tkill
__syscall_end:
.rept NR_syscalls - (__syscall_end - __syscall_start) / 4
.long sys_ni_syscall
.endr
#endif

173
arch/arm26/kernel/compat.c
View File

@ -1,173 +0,0 @@
/*
* linux/arch/arm26/kernel/compat.c
*
* Copyright (C) 2001 Russell King
* 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* We keep the old params compatibility cruft in one place (here)
* so we don't end up with lots of mess around other places.
*
* NOTE:
* The old struct param_struct is deprecated, but it will be kept in
* the kernel for 5 years from now (2001). This will allow boot loaders
* to convert to the new struct tag way.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/page.h>
//#include <asm/arch.h>
//#include <asm/mach/irq.h>
/*
* Usage:
* - do not go blindly adding fields, add them at the end
* - when adding fields, don't rely on the address until
* a patch from me has been released
* - unused fields should be zero (for future expansion)
* - this structure is relatively short-lived - only
* guaranteed to contain useful data in setup_arch()
*
* This is the old deprecated way to pass parameters to the kernel
*/
struct param_struct {
union {
struct {
unsigned long page_size; /* 0 */
unsigned long nr_pages; /* 4 */
unsigned long ramdisk_size; /* 8 */
unsigned long flags; /* 12 */
#define FLAG_READONLY 1
#define FLAG_RDLOAD 4
#define FLAG_RDPROMPT 8
unsigned long rootdev; /* 16 */
unsigned long video_num_cols; /* 20 */
unsigned long video_num_rows; /* 24 */
unsigned long video_x; /* 28 */
unsigned long video_y; /* 32 */
unsigned long memc_control_reg; /* 36 */
unsigned char sounddefault; /* 40 */
unsigned char adfsdrives; /* 41 */
unsigned char bytes_per_char_h; /* 42 */
unsigned char bytes_per_char_v; /* 43 */
unsigned long pages_in_bank[4]; /* 44 */
unsigned long pages_in_vram; /* 60 */
unsigned long initrd_start; /* 64 */
unsigned long initrd_size; /* 68 */
unsigned long rd_start; /* 72 */
unsigned long system_rev; /* 76 */
unsigned long system_serial_low; /* 80 */
unsigned long system_serial_high; /* 84 */
unsigned long mem_fclk_21285; /* 88 */
} s;
char unused[256];
} u1;
union {
char paths[8][128];
struct {
unsigned long magic;
char n[1024 - sizeof(unsigned long)];
} s;
} u2;
char commandline[COMMAND_LINE_SIZE];
};
static struct tag * __init memtag(struct tag *tag, unsigned long start, unsigned long size)
{
tag = tag_next(tag);
tag->hdr.tag = ATAG_MEM;
tag->hdr.size = tag_size(tag_mem32);
tag->u.mem.size = size;
tag->u.mem.start = start;
return tag;
}
static void __init build_tag_list(struct param_struct *params, void *taglist)
{
struct tag *tag = taglist;
if (params->u1.s.page_size != PAGE_SIZE) {
printk(KERN_WARNING "Warning: bad configuration page, "
"trying to continue\n");
return;
}
printk(KERN_DEBUG "Converting old-style param struct to taglist\n");
tag->hdr.tag = ATAG_CORE;
tag->hdr.size = tag_size(tag_core);
tag->u.core.flags = params->u1.s.flags & FLAG_READONLY;
tag->u.core.pagesize = params->u1.s.page_size;
tag->u.core.rootdev = params->u1.s.rootdev;
tag = tag_next(tag);
tag->hdr.tag = ATAG_RAMDISK;
tag->hdr.size = tag_size(tag_ramdisk);
tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
(params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
tag->u.ramdisk.size = params->u1.s.ramdisk_size;
tag->u.ramdisk.start = params->u1.s.rd_start;
tag = tag_next(tag);
tag->hdr.tag = ATAG_INITRD;
tag->hdr.size = tag_size(tag_initrd);
tag->u.initrd.start = params->u1.s.initrd_start;
tag->u.initrd.size = params->u1.s.initrd_size;
tag = tag_next(tag);
tag->hdr.tag = ATAG_SERIAL;
tag->hdr.size = tag_size(tag_serialnr);
tag->u.serialnr.low = params->u1.s.system_serial_low;
tag->u.serialnr.high = params->u1.s.system_serial_high;
tag = tag_next(tag);
tag->hdr.tag = ATAG_REVISION;
tag->hdr.size = tag_size(tag_revision);
tag->u.revision.rev = params->u1.s.system_rev;
tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE);
tag = tag_next(tag);
tag->hdr.tag = ATAG_ACORN;
tag->hdr.size = tag_size(tag_acorn);
tag->u.acorn.memc_control_reg = params->u1.s.memc_control_reg;
tag->u.acorn.vram_pages = params->u1.s.pages_in_vram;
tag->u.acorn.sounddefault = params->u1.s.sounddefault;
tag->u.acorn.adfsdrives = params->u1.s.adfsdrives;
tag = tag_next(tag);
tag->hdr.tag = ATAG_CMDLINE;
tag->hdr.size = (strlen(params->commandline) + 3 +
sizeof(struct tag_header)) >> 2;
strcpy(tag->u.cmdline.cmdline, params->commandline);
tag = tag_next(tag);
tag->hdr.tag = ATAG_NONE;
tag->hdr.size = 0;
memmove(params, taglist, ((int)tag) - ((int)taglist) +
sizeof(struct tag_header));
}
void __init convert_to_tag_list(struct tag *tags)
{
struct param_struct *params = (struct param_struct *)tags;
build_tag_list(params, &params->u2);
}
void __init squash_mem_tags(struct tag *tag)
{
for (; tag->hdr.size; tag = tag_next(tag))
if (tag->hdr.tag == ATAG_MEM)
tag->hdr.tag = ATAG_NONE;
}

273
arch/arm26/kernel/dma.c
View File

@ -1,273 +0,0 @@
/*
* linux/arch/arm26/kernel/dma.c
*
* Copyright (C) 1995-2000 Russell King
* 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Front-end to the DMA handling. This handles the allocation/freeing
* of DMA channels, and provides a unified interface to the machines
* DMA facilities.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/mman.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <asm/dma.h>
DEFINE_SPINLOCK(dma_spin_lock);
static dma_t dma_chan[MAX_DMA_CHANNELS];
/*
* Get dma list for /proc/dma
*/
int get_dma_list(char *buf)
{
dma_t *dma;
char *p = buf;
int i;
for (i = 0, dma = dma_chan; i < MAX_DMA_CHANNELS; i++, dma++)
if (dma->lock)
p += sprintf(p, "%2d: %14s %s\n", i,
dma->d_ops->type, dma->device_id);
return p - buf;
}
/*
* Request DMA channel
*
* On certain platforms, we have to allocate an interrupt as well...
*/
int request_dma(dmach_t channel, const char *device_id)
{
dma_t *dma = dma_chan + channel;
int ret;
if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
goto bad_dma;
if (xchg(&dma->lock, 1) != 0)
goto busy;
dma->device_id = device_id;
dma->active = 0;
dma->invalid = 1;
ret = 0;
if (dma->d_ops->request)
ret = dma->d_ops->request(channel, dma);
if (ret)
xchg(&dma->lock, 0);
return ret;
bad_dma:
printk(KERN_ERR "dma: trying to allocate DMA%d\n", channel);
return -EINVAL;
busy:
return -EBUSY;
}
/*
* Free DMA channel
*
* On certain platforms, we have to free interrupt as well...
*/
void free_dma(dmach_t channel)
{
dma_t *dma = dma_chan + channel;
if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
goto bad_dma;
if (dma->active) {
printk(KERN_ERR "dma%d: freeing active DMA\n", channel);
dma->d_ops->disable(channel, dma);
dma->active = 0;
}
if (xchg(&dma->lock, 0) != 0) {
if (dma->d_ops->free)
dma->d_ops->free(channel, dma);
return;
}
printk(KERN_ERR "dma%d: trying to free free DMA\n", channel);
return;
bad_dma:
printk(KERN_ERR "dma: trying to free DMA%d\n", channel);
}
/* Set DMA Scatter-Gather list
*/
void set_dma_sg (dmach_t channel, struct scatterlist *sg, int nr_sg)
{
dma_t *dma = dma_chan + channel;
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA SG while "
"DMA active\n", channel);
dma->sg = sg;
dma->sgcount = nr_sg;
dma->using_sg = 1;
dma->invalid = 1;
}
/* Set DMA address
*
* Copy address to the structure, and set the invalid bit
*/
void set_dma_addr (dmach_t channel, unsigned long physaddr)
{
dma_t *dma = dma_chan + channel;
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA address while "
"DMA active\n", channel);
dma->sg = &dma->buf;
dma->sgcount = 1;
dma->buf.__address = (char *)physaddr;//FIXME - not pretty
dma->using_sg = 0;
dma->invalid = 1;
}
/* Set DMA byte count
*
* Copy address to the structure, and set the invalid bit
*/
void set_dma_count (dmach_t channel, unsigned long count)
{
dma_t *dma = dma_chan + channel;
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA count while "
"DMA active\n", channel);
dma->sg = &dma->buf;
dma->sgcount = 1;
dma->buf.length = count;
dma->using_sg = 0;
dma->invalid = 1;
}
/* Set DMA direction mode
*/
void set_dma_mode (dmach_t channel, dmamode_t mode)
{
dma_t *dma = dma_chan + channel;
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA mode while "
"DMA active\n", channel);
dma->dma_mode = mode;
dma->invalid = 1;
}
/* Enable DMA channel
*/
void enable_dma (dmach_t channel)
{
dma_t *dma = dma_chan + channel;
if (!dma->lock)
goto free_dma;
if (dma->active == 0) {
dma->active = 1;
dma->d_ops->enable(channel, dma);
}
return;
free_dma:
printk(KERN_ERR "dma%d: trying to enable free DMA\n", channel);
BUG();
}
/* Disable DMA channel
*/
void disable_dma (dmach_t channel)
{
dma_t *dma = dma_chan + channel;
if (!dma->lock)
goto free_dma;
if (dma->active == 1) {
dma->active = 0;
dma->d_ops->disable(channel, dma);
}
return;
free_dma:
printk(KERN_ERR "dma%d: trying to disable free DMA\n", channel);
BUG();
}
/*
* Is the specified DMA channel active?
*/
int dma_channel_active(dmach_t channel)
{
return dma_chan[channel].active;
}
void set_dma_page(dmach_t channel, char pagenr)
{
printk(KERN_ERR "dma%d: trying to set_dma_page\n", channel);
}
void set_dma_speed(dmach_t channel, int cycle_ns)
{
dma_t *dma = dma_chan + channel;
int ret = 0;
if (dma->d_ops->setspeed)
ret = dma->d_ops->setspeed(channel, dma, cycle_ns);
dma->speed = ret;
}
int get_dma_residue(dmach_t channel)
{
dma_t *dma = dma_chan + channel;
int ret = 0;
if (dma->d_ops->residue)
ret = dma->d_ops->residue(channel, dma);
return ret;
}
void __init init_dma(void)
{
arch_dma_init(dma_chan);
}
EXPORT_SYMBOL(request_dma);
EXPORT_SYMBOL(free_dma);
EXPORT_SYMBOL(enable_dma);
EXPORT_SYMBOL(disable_dma);
EXPORT_SYMBOL(set_dma_addr);
EXPORT_SYMBOL(set_dma_count);
EXPORT_SYMBOL(set_dma_mode);
EXPORT_SYMBOL(set_dma_page);
EXPORT_SYMBOL(get_dma_residue);
EXPORT_SYMBOL(set_dma_sg);
EXPORT_SYMBOL(set_dma_speed);
EXPORT_SYMBOL(dma_spin_lock);

847
arch/arm26/kernel/ecard.c
View File

@ -1,847 +0,0 @@
/*
* linux/arch/arm26/kernel/ecard.c
*
* Copyright 1995-2001 Russell King
* Copyright 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Find all installed expansion cards, and handle interrupts from them.
*
* Created from information from Acorns RiscOS3 PRMs
* 15-Jun-2003 IM Modified from ARM32 (RiscPC capable) version
* 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment.
* 06-May-1997 RMK Added blacklist for cards whose loader doesn't work.
* 12-Sep-1997 RMK Created new handling of interrupt enables/disables
* - cards can now register their own routine to control
* interrupts (recommended).
* 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled
* on reset from Linux. (Caused cards not to respond
* under RiscOS without hard reset).
*
*/
#define ECARD_C
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/init.h>
#include <asm/dma.h>
#include <asm/ecard.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/irqchip.h>
#include <asm/tlbflush.h>
enum req {
req_readbytes,
req_reset
};
struct ecard_request {
enum req req;
ecard_t *ec;
unsigned int address;
unsigned int length;
unsigned int use_loader;
void *buffer;
};
struct expcard_blacklist {
unsigned short manufacturer;
unsigned short product;
const char *type;
};
static ecard_t *cards;
static ecard_t *slot_to_expcard[MAX_ECARDS];
static unsigned int ectcr;
/* List of descriptions of cards which don't have an extended
* identification, or chunk directories containing a description.
*/
static struct expcard_blacklist __initdata blacklist[] = {
{ MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
};
asmlinkage extern int
ecard_loader_reset(volatile unsigned char *pa, loader_t loader);
asmlinkage extern int
ecard_loader_read(int off, volatile unsigned char *pa, loader_t loader);
static const struct ecard_id *
ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec);
static inline unsigned short
ecard_getu16(unsigned char *v)
{
return v[0] | v[1] << 8;
}
static inline signed long
ecard_gets24(unsigned char *v)
{
return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
}
static inline ecard_t *
slot_to_ecard(unsigned int slot)
{
return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
}
/* ===================== Expansion card daemon ======================== */
/*
* Since the loader programs on the expansion cards need to be run
* in a specific environment, create a separate task with this
* environment up, and pass requests to this task as and when we
* need to.
*
* This should allow 99% of loaders to be called from Linux.
*
* From a security standpoint, we trust the card vendors. This
* may be a misplaced trust.
*/
#define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE)
#define POD_INT_ADDR(x) ((volatile unsigned char *)\
((BUS_ADDR((x)) - IO_BASE) + IO_START))
static inline void ecard_task_reset(struct ecard_request *req)
{
struct expansion_card *ec = req->ec;
if (ec->loader)
ecard_loader_reset(POD_INT_ADDR(ec->podaddr), ec->loader);
}
static void
ecard_task_readbytes(struct ecard_request *req)
{
unsigned char *buf = (unsigned char *)req->buffer;
volatile unsigned char *base_addr =
(volatile unsigned char *)POD_INT_ADDR(req->ec->podaddr);
unsigned int len = req->length;
unsigned int off = req->address;
if (!req->use_loader || !req->ec->loader) {
off *= 4;
while (len--) {
*buf++ = base_addr[off];
off += 4;
}
} else {
while(len--) {
/*
* The following is required by some
* expansion card loader programs.
*/
*(unsigned long *)0x108 = 0;
*buf++ = ecard_loader_read(off++, base_addr,
req->ec->loader);
}
}
}
static void ecard_do_request(struct ecard_request *req)
{
switch (req->req) {
case req_readbytes:
ecard_task_readbytes(req);
break;
case req_reset:
ecard_task_reset(req);
break;
}
}
/*
* On 26-bit processors, we don't need the kcardd thread to access the
* expansion card loaders. We do it directly.
*/
#define ecard_call(req) ecard_do_request(req)
/* ======================= Mid-level card control ===================== */
static void
ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
{
struct ecard_request req;
req.req = req_readbytes;
req.ec = ec;
req.address = off;
req.length = len;
req.use_loader = useld;
req.buffer = addr;
ecard_call(&req);
}
int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
{
struct ex_chunk_dir excd;
int index = 16;
int useld = 0;
if (!ec->cid.cd)
return 0;
while(1) {
ecard_readbytes(&excd, ec, index, 8, useld);
index += 8;
if (c_id(&excd) == 0) {
if (!useld && ec->loader) {
useld = 1;
index = 0;
continue;
}
return 0;
}
if (c_id(&excd) == 0xf0) { /* link */
index = c_start(&excd);
continue;
}
if (c_id(&excd) == 0x80) { /* loader */
if (!ec->loader) {
ec->loader = kmalloc(c_len(&excd),
GFP_KERNEL);
if (ec->loader)
ecard_readbytes(ec->loader, ec,
(int)c_start(&excd),
c_len(&excd), useld);
else
return 0;
}
continue;
}
if (c_id(&excd) == id && num-- == 0)
break;
}
if (c_id(&excd) & 0x80) {
switch (c_id(&excd) & 0x70) {
case 0x70:
ecard_readbytes((unsigned char *)excd.d.string, ec,
(int)c_start(&excd), c_len(&excd),
useld);
break;
case 0x00:
break;
}
}
cd->start_offset = c_start(&excd);
memcpy(cd->d.string, excd.d.string, 256);
return 1;
}
/* ======================= Interrupt control ============================ */
static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
{
}
static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
{
}
static int ecard_def_irq_pending(ecard_t *ec)
{
return !ec->irqmask || ec->irqaddr[0] & ec->irqmask;
}
static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
{
panic("ecard_def_fiq_enable called - impossible");
}
static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
{
panic("ecard_def_fiq_disable called - impossible");
}
static int ecard_def_fiq_pending(ecard_t *ec)
{
return !ec->fiqmask || ec->fiqaddr[0] & ec->fiqmask;
}
static expansioncard_ops_t ecard_default_ops = {
ecard_def_irq_enable,
ecard_def_irq_disable,
ecard_def_irq_pending,
ecard_def_fiq_enable,
ecard_def_fiq_disable,
ecard_def_fiq_pending
};
/*
* Enable and disable interrupts from expansion cards.
* (interrupts are disabled for these functions).
*
* They are not meant to be called directly, but via enable/disable_irq.
*/
static void ecard_irq_unmask(unsigned int irqnr)
{
ecard_t *ec = slot_to_ecard(irqnr - 32);
if (ec) {
if (!ec->ops)
ec->ops = &ecard_default_ops;
if (ec->claimed && ec->ops->irqenable)
ec->ops->irqenable(ec, irqnr);
else
printk(KERN_ERR "ecard: rejecting request to "
"enable IRQs for %d\n", irqnr);
}
}
static void ecard_irq_mask(unsigned int irqnr)
{
ecard_t *ec = slot_to_ecard(irqnr - 32);
if (ec) {
if (!ec->ops)
ec->ops = &ecard_default_ops;
if (ec->ops && ec->ops->irqdisable)
ec->ops->irqdisable(ec, irqnr);
}
}
static struct irqchip ecard_chip = {
.ack = ecard_irq_mask,
.mask = ecard_irq_mask,
.unmask = ecard_irq_unmask,
};
void ecard_enablefiq(unsigned int fiqnr)
{
ecard_t *ec = slot_to_ecard(fiqnr);
if (ec) {
if (!ec->ops)
ec->ops = &ecard_default_ops;
if (ec->claimed && ec->ops->fiqenable)
ec->ops->fiqenable(ec, fiqnr);
else
printk(KERN_ERR "ecard: rejecting request to "
"enable FIQs for %d\n", fiqnr);
}
}
void ecard_disablefiq(unsigned int fiqnr)
{
ecard_t *ec = slot_to_ecard(fiqnr);
if (ec) {
if (!ec->ops)
ec->ops = &ecard_default_ops;
if (ec->ops->fiqdisable)
ec->ops->fiqdisable(ec, fiqnr);
}
}
static void
ecard_dump_irq_state(ecard_t *ec)
{
printk(" %d: %sclaimed, ",
ec->slot_no,
ec->claimed ? "" : "not ");
if (ec->ops && ec->ops->irqpending &&
ec->ops != &ecard_default_ops)
printk("irq %spending\n",
ec->ops->irqpending(ec) ? "" : "not ");
else
printk("irqaddr %p, mask = %02X, status = %02X\n",
ec->irqaddr, ec->irqmask, *ec->irqaddr);
}
static void ecard_check_lockup(struct irqdesc *desc)
{
static int last, lockup;
ecard_t *ec;
/*
* If the timer interrupt has not run since the last million
* unrecognised expansion card interrupts, then there is
* something seriously wrong. Disable the expansion card
* interrupts so at least we can continue.
*
* Maybe we ought to start a timer to re-enable them some time
* later?
*/
if (last == jiffies) {
lockup += 1;
if (lockup > 1000000) {
printk(KERN_ERR "\nInterrupt lockup detected - "
"disabling all expansion card interrupts\n");
desc->chip->mask(IRQ_EXPANSIONCARD);
printk("Expansion card IRQ state:\n");
for (ec = cards; ec; ec = ec->next)
ecard_dump_irq_state(ec);
}
} else
lockup = 0;
/*
* If we did not recognise the source of this interrupt,
* warn the user, but don't flood the user with these messages.
*/
if (!last || time_after(jiffies, (unsigned long)(last + 5*HZ))) {
last = jiffies;
printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
}
}
static void
ecard_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
ecard_t *ec;
int called = 0;
desc->chip->mask(irq);
for (ec = cards; ec; ec = ec->next) {
int pending;
if (!ec->claimed || ec->irq == NO_IRQ)
continue;
if (ec->ops && ec->ops->irqpending)
pending = ec->ops->irqpending(ec);
else
pending = ecard_default_ops.irqpending(ec);
if (pending) {
struct irqdesc *d = irq_desc + ec->irq;
d->handle(ec->irq, d, regs);
called ++;
}
}
desc->chip->unmask(irq);
if (called == 0)
ecard_check_lockup(desc);
}
#define ecard_irqexp_handler NULL
#define ecard_probeirqhw() (0)
unsigned int ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
{
unsigned long address = 0;
int slot = ec->slot_no;
ectcr &= ~(1 << slot);
switch (type) {
case ECARD_MEMC:
address = IO_EC_MEMC_BASE + (slot << 12);
break;
case ECARD_IOC:
address = IO_EC_IOC_BASE + (slot << 12) + (speed << 17);
break;
default:
break;
}
return address;
}
static int ecard_prints(char *buffer, ecard_t *ec)
{
char *start = buffer;
buffer += sprintf(buffer, " %d: ", ec->slot_no);
if (ec->cid.id == 0) {
struct in_chunk_dir incd;
buffer += sprintf(buffer, "[%04X:%04X] ",
ec->cid.manufacturer, ec->cid.product);
if (!ec->card_desc && ec->cid.cd &&
ecard_readchunk(&incd, ec, 0xf5, 0)) {
ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
if (ec->card_desc)
strcpy((char *)ec->card_desc, incd.d.string);
}
buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
} else
buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id);
return buffer - start;
}
static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count)
{
ecard_t *ec = cards;
off_t at = 0;
int len, cnt;
cnt = 0;
while (ec && count > cnt) {
len = ecard_prints(buf, ec);
at += len;
if (at >= pos) {
if (!*start) {
*start = buf + (pos - (at - len));
cnt = at - pos;
} else
cnt += len;
buf += len;
}
ec = ec->next;
}
return (count > cnt) ? cnt : count;
}
static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
static void ecard_proc_init(void)
{
proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus);
create_proc_info_entry("devices", 0, proc_bus_ecard_dir,
get_ecard_dev_info);
}
#define ec_set_resource(ec,nr,st,sz,flg) \
do { \
(ec)->resource[nr].name = ec->dev.bus_id; \
(ec)->resource[nr].start = st; \
(ec)->resource[nr].end = (st) + (sz) - 1; \
(ec)->resource[nr].flags = flg; \
} while (0)
static void __init ecard_init_resources(struct expansion_card *ec)
{
unsigned long base = PODSLOT_IOC0_BASE;
unsigned int slot = ec->slot_no;
int i;
ec_set_resource(ec, ECARD_RES_MEMC,
PODSLOT_MEMC_BASE + (slot << 14),
PODSLOT_MEMC_SIZE, IORESOURCE_MEM);
for (i = 0; i < ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) {
ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
base + (slot << 14) + (i << 19),
PODSLOT_IOC_SIZE, IORESOURCE_MEM);
}
for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
if (ec->resource[i].start &&
request_resource(&iomem_resource, &ec->resource[i])) {
printk(KERN_ERR "%s: resource(s) not available\n",
ec->dev.bus_id);
ec->resource[i].end -= ec->resource[i].start;
ec->resource[i].start = 0;
}
}
}
static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
return sprintf(buf, "%u\n", ec->irq);
}
static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
return sprintf(buf, "%u\n", ec->cid.manufacturer);
}
static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
return sprintf(buf, "%u\n", ec->cid.product);
}
static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
return sprintf(buf, "%u\n", ec->dma);
}
static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
char *str = buf;
int i;
for (i = 0; i < ECARD_NUM_RESOURCES; i++)
str += sprintf(str, "%08lx %08lx %08lx\n",
ec->resource[i].start,
ec->resource[i].end,
ec->resource[i].flags);
return str - buf;
}
static DEVICE_ATTR(irq, S_IRUGO, ecard_show_irq, NULL);
static DEVICE_ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL);
static DEVICE_ATTR(device, S_IRUGO, ecard_show_device, NULL);
static DEVICE_ATTR(dma, S_IRUGO, ecard_show_dma, NULL);
static DEVICE_ATTR(resource, S_IRUGO, ecard_show_resources, NULL);
/*
* Probe for an expansion card.
*
* If bit 1 of the first byte of the card is set, then the
* card does not exist.
*/
static int __init
ecard_probe(int slot, card_type_t type)
{
ecard_t **ecp;
ecard_t *ec;
struct ex_ecid cid;
int i, rc = -ENOMEM;
ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
if (!ec)
goto nomem;
ec->slot_no = slot;
ec->type = type;
ec->irq = NO_IRQ;
ec->fiq = NO_IRQ;
ec->dma = NO_DMA;
ec->card_desc = NULL;
ec->ops = &ecard_default_ops;
rc = -ENODEV;
if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0)
goto nodev;
cid.r_zero = 1;
ecard_readbytes(&cid, ec, 0, 16, 0);
if (cid.r_zero)
goto nodev;
ec->cid.id = cid.r_id;
ec->cid.cd = cid.r_cd;
ec->cid.is = cid.r_is;
ec->cid.w = cid.r_w;
ec->cid.manufacturer = ecard_getu16(cid.r_manu);
ec->cid.product = ecard_getu16(cid.r_prod);
ec->cid.country = cid.r_country;
ec->cid.irqmask = cid.r_irqmask;
ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
ec->cid.fiqmask = cid.r_fiqmask;
ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
ec->fiqaddr =
ec->irqaddr = (unsigned char *)ioaddr(ec->podaddr);
if (ec->cid.is) {
ec->irqmask = ec->cid.irqmask;
ec->irqaddr += ec->cid.irqoff;
ec->fiqmask = ec->cid.fiqmask;
ec->fiqaddr += ec->cid.fiqoff;
} else {
ec->irqmask = 1;
ec->fiqmask = 4;
}
for (i = 0; i < ARRAY_SIZE(blacklist); i++)
if (blacklist[i].manufacturer == ec->cid.manufacturer &&
blacklist[i].product == ec->cid.product) {
ec->card_desc = blacklist[i].type;
break;
}
snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot);
ec->dev.parent = NULL;
ec->dev.bus = &ecard_bus_type;
ec->dev.dma_mask = &ec->dma_mask;
ec->dma_mask = (u64)0xffffffff;
ecard_init_resources(ec);
/*
* hook the interrupt handlers
*/
ec->irq = 32 + slot;
set_irq_chip(ec->irq, &ecard_chip);
set_irq_handler(ec->irq, do_level_IRQ);
set_irq_flags(ec->irq, IRQF_VALID);
for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
*ecp = ec;
slot_to_expcard[slot] = ec;
device_register(&ec->dev);
device_create_file(&ec->dev, &dev_attr_dma);
device_create_file(&ec->dev, &dev_attr_irq);
device_create_file(&ec->dev, &dev_attr_resource);
device_create_file(&ec->dev, &dev_attr_vendor);
device_create_file(&ec->dev, &dev_attr_device);
return 0;
nodev:
kfree(ec);
nomem:
return rc;
}
/*
* Initialise the expansion card system.
* Locate all hardware - interrupt management and
* actual cards.
*/
static int __init ecard_init(void)
{
int slot, irqhw;
printk("Probing expansion cards\n");
for (slot = 0; slot < MAX_ECARDS; slot ++) {
ecard_probe(slot, ECARD_IOC);
}
irqhw = ecard_probeirqhw();
set_irq_chained_handler(IRQ_EXPANSIONCARD,
irqhw ? ecard_irqexp_handler : ecard_irq_handler);
ecard_proc_init();
return 0;
}
subsys_initcall(ecard_init);
/*
* ECARD "bus"
*/
static const struct ecard_id *
ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
{
int i;
for (i = 0; ids[i].manufacturer != 65535; i++)
if (ec->cid.manufacturer == ids[i].manufacturer &&
ec->cid.product == ids[i].product)
return ids + i;
return NULL;
}
static int ecard_drv_probe(struct device *dev)
{
struct expansion_card *ec = ECARD_DEV(dev);
struct ecard_driver *drv = ECARD_DRV(dev->driver);
const struct ecard_id *id;
int ret;
id = ecard_match_device(drv->id_table, ec);
ecard_claim(ec);
ret = drv->probe(ec, id);
if (ret)
ecard_release(ec);
return ret;
}
static int ecard_drv_remove(struct device *dev)
{
struct expansion_card *ec = ECARD_DEV(dev);
struct ecard_driver *drv = ECARD_DRV(dev->driver);
drv->remove(ec);
ecard_release(ec);
return 0;
}
/*
* Before rebooting, we must make sure that the expansion card is in a
* sensible state, so it can be re-detected. This means that the first
* page of the ROM must be visible. We call the expansion cards reset
* handler, if any.
*/
static void ecard_drv_shutdown(struct device *dev)
{
struct expansion_card *ec = ECARD_DEV(dev);
struct ecard_driver *drv = ECARD_DRV(dev->driver);
struct ecard_request req;
if (drv->shutdown)
drv->shutdown(ec);
ecard_release(ec);
req.req = req_reset;
req.ec = ec;
ecard_call(&req);
}
int ecard_register_driver(struct ecard_driver *drv)
{
drv->drv.bus = &ecard_bus_type;
drv->drv.probe = ecard_drv_probe;
drv->drv.remove = ecard_drv_remove;
drv->drv.shutdown = ecard_drv_shutdown;
return driver_register(&drv->drv);
}
void ecard_remove_driver(struct ecard_driver *drv)
{
driver_unregister(&drv->drv);
}
static int ecard_match(struct device *_dev, struct device_driver *_drv)
{
struct expansion_card *ec = ECARD_DEV(_dev);
struct ecard_driver *drv = ECARD_DRV(_drv);
int ret;
if (drv->id_table) {
ret = ecard_match_device(drv->id_table, ec) != NULL;
} else {
ret = ec->cid.id == drv->id;
}
return ret;
}
struct bus_type ecard_bus_type = {
.name = "ecard",
.match = ecard_match,
};
static int ecard_bus_init(void)
{
return bus_register(&ecard_bus_type);
}
postcore_initcall(ecard_bus_init);
EXPORT_SYMBOL(ecard_readchunk);
EXPORT_SYMBOL(ecard_address);
EXPORT_SYMBOL(ecard_register_driver);
EXPORT_SYMBOL(ecard_remove_driver);
EXPORT_SYMBOL(ecard_bus_type);

951
arch/arm26/kernel/entry.S
View File

@ -1,951 +0,0 @@
/* arch/arm26/kernel/entry.S
*
* Assembled from chunks of code in arch/arm
*
* Copyright (C) 2003 Ian Molton
* Based on the work of RMK.
*
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/errno.h>
#include <asm/hardware.h>
#include <asm/sysirq.h>
#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm/ptrace.h>
.macro zero_fp
#ifndef CONFIG_NO_FRAME_POINTER
mov fp, #0
#endif
.endm
.text
@ Bad Abort numbers
@ -----------------
@
#define BAD_PREFETCH 0
#define BAD_DATA 1
#define BAD_ADDREXCPTN 2
#define BAD_IRQ 3
#define BAD_UNDEFINSTR 4
@ OS version number used in SWIs
@ RISC OS is 0
@ RISC iX is 8
@
#define OS_NUMBER 9
#define ARMSWI_OFFSET 0x000f0000
@
@ Stack format (ensured by USER_* and SVC_*)
@ PSR and PC are comined on arm26
@
#define S_OFF 8
#define S_OLD_R0 64
#define S_PC 60
#define S_LR 56
#define S_SP 52
#define S_IP 48
#define S_FP 44
#define S_R10 40
#define S_R9 36
#define S_R8 32
#define S_R7 28
#define S_R6 24
#define S_R5 20
#define S_R4 16
#define S_R3 12
#define S_R2 8
#define S_R1 4
#define S_R0 0
.macro save_user_regs
str r0, [sp, #-4]! @ Store SVC r0
str lr, [sp, #-4]! @ Store user mode PC
sub sp, sp, #15*4
stmia sp, {r0 - lr}^ @ Store the other user-mode regs
mov r0, r0
.endm
.macro slow_restore_user_regs
ldmia sp, {r0 - lr}^ @ restore the user regs not including PC
mov r0, r0
ldr lr, [sp, #15*4] @ get user PC
add sp, sp, #15*4+8 @ free stack
movs pc, lr @ return
.endm
.macro fast_restore_user_regs
add sp, sp, #S_OFF
ldmib sp, {r1 - lr}^
mov r0, r0
ldr lr, [sp, #15*4]
add sp, sp, #15*4+8
movs pc, lr
.endm
.macro save_svc_regs
str sp, [sp, #-16]!
str lr, [sp, #8]
str lr, [sp, #4]
stmfd sp!, {r0 - r12}
mov r0, #-1
str r0, [sp, #S_OLD_R0]
zero_fp
.endm
.macro save_svc_regs_irq
str sp, [sp, #-16]!
str lr, [sp, #4]
ldr lr, .LCirq
ldr lr, [lr]
str lr, [sp, #8]
stmfd sp!, {r0 - r12}
mov r0, #-1
str r0, [sp, #S_OLD_R0]
zero_fp
.endm
.macro restore_svc_regs
ldmfd sp, {r0 - pc}^
.endm
.macro mask_pc, rd, rm
bic \rd, \rm, #PCMASK
.endm
.macro disable_irqs, temp
mov \temp, pc
orr \temp, \temp, #PSR_I_BIT
teqp \temp, #0
.endm
.macro enable_irqs, temp
mov \temp, pc
and \temp, \temp, #~PSR_I_BIT
teqp \temp, #0
.endm
.macro initialise_traps_extra
.endm
.macro get_thread_info, rd
mov \rd, sp, lsr #13
mov \rd, \rd, lsl #13
.endm
/*
* These are the registers used in the syscall handler, and allow us to
* have in theory up to 7 arguments to a function - r0 to r6.
*
* Note that tbl == why is intentional.
*
* We must set at least "tsk" and "why" when calling ret_with_reschedule.
*/
scno .req r7 @ syscall number
tbl .req r8 @ syscall table pointer
why .req r8 @ Linux syscall (!= 0)
tsk .req r9 @ current thread_info
/*
* Get the system call number.
*/
.macro get_scno
mask_pc lr, lr
ldr scno, [lr, #-4] @ get SWI instruction
.endm
/*
* -----------------------------------------------------------------------
*/
/*
* We rely on the fact that R0 is at the bottom of the stack (due to
* slow/fast restore user regs).
*/
#if S_R0 != 0
#error "Please fix"
#endif
/*
* This is the fast syscall return path. We do as little as
* possible here, and this includes saving r0 back into the SVC
* stack.
*/
ret_fast_syscall:
disable_irqs r1 @ disable interrupts
ldr r1, [tsk, #TI_FLAGS]
tst r1, #_TIF_WORK_MASK
bne fast_work_pending
fast_restore_user_regs
/*
* Ok, we need to do extra processing, enter the slow path.
*/
fast_work_pending:
str r0, [sp, #S_R0+S_OFF]! @ returned r0
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
bl do_notify_resume
disable_irqs r1 @ disable interrupts
b no_work_pending
work_resched:
bl schedule
/*
* "slow" syscall return path. "why" tells us if this was a real syscall.
*/
ENTRY(ret_to_user)
ret_slow_syscall:
disable_irqs r1 @ disable interrupts
ldr r1, [tsk, #TI_FLAGS]
tst r1, #_TIF_WORK_MASK
bne work_pending
no_work_pending:
slow_restore_user_regs
/*
* This is how we return from a fork.
*/
ENTRY(ret_from_fork)
bl schedule_tail
get_thread_info tsk
ldr r1, [tsk, #TI_FLAGS] @ check for syscall tracing
mov why, #1
tst r1, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
beq ret_slow_syscall
mov r1, sp
mov r0, #1 @ trace exit [IP = 1]
bl syscall_trace
b ret_slow_syscall
// FIXME - is this strictly necessary?
#include "calls.S"
/*=============================================================================
* SWI handler
*-----------------------------------------------------------------------------
*/
.align 5
ENTRY(vector_swi)
save_user_regs
zero_fp
get_scno
enable_irqs ip
str r4, [sp, #-S_OFF]! @ push fifth arg
get_thread_info tsk
ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing
bic scno, scno, #0xff000000 @ mask off SWI op-code
eor scno, scno, #OS_NUMBER << 20 @ check OS number
adr tbl, sys_call_table @ load syscall table pointer
tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
bne __sys_trace
adral lr, ret_fast_syscall @ set return address
orral lr, lr, #PSR_I_BIT | MODE_SVC26 @ Force SVC mode on return
cmp scno, #NR_syscalls @ check upper syscall limit
ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
add r1, sp, #S_OFF
2: mov why, #0 @ no longer a real syscall
cmp scno, #ARMSWI_OFFSET
eor r0, scno, #OS_NUMBER << 20 @ put OS number back
bcs arm_syscall
b sys_ni_syscall @ not private func
/*
* This is the really slow path. We're going to be doing
* context switches, and waiting for our parent to respond.
*/
__sys_trace:
add r1, sp, #S_OFF
mov r0, #0 @ trace entry [IP = 0]
bl syscall_trace
adral lr, __sys_trace_return @ set return address
orral lr, lr, #PSR_I_BIT | MODE_SVC26 @ Force SVC mode on return
add r1, sp, #S_R0 + S_OFF @ pointer to regs
cmp scno, #NR_syscalls @ check upper syscall limit
ldmccia r1, {r0 - r3} @ have to reload r0 - r3
ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
b 2b
__sys_trace_return:
str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
mov r1, sp
mov r0, #1 @ trace exit [IP = 1]
bl syscall_trace
b ret_slow_syscall
.align 5
.type sys_call_table, #object
ENTRY(sys_call_table)
#include "calls.S"
/*============================================================================
* Special system call wrappers
*/
@ r0 = syscall number
@ r5 = syscall table
.type sys_syscall, #function
sys_syscall:
eor scno, r0, #OS_NUMBER << 20
cmp scno, #NR_syscalls @ check range
stmleia sp, {r5, r6} @ shuffle args
movle r0, r1
movle r1, r2
movle r2, r3
movle r3, r4
ldrle pc, [tbl, scno, lsl #2]
b sys_ni_syscall
sys_fork_wrapper:
add r0, sp, #S_OFF
b sys_fork
sys_vfork_wrapper:
add r0, sp, #S_OFF
b sys_vfork
sys_execve_wrapper:
add r3, sp, #S_OFF
b sys_execve
sys_clone_wapper:
add r2, sp, #S_OFF
b sys_clone
sys_sigsuspend_wrapper:
add r3, sp, #S_OFF
b sys_sigsuspend
sys_rt_sigsuspend_wrapper:
add r2, sp, #S_OFF
b sys_rt_sigsuspend
sys_sigreturn_wrapper:
add r0, sp, #S_OFF
b sys_sigreturn
sys_rt_sigreturn_wrapper:
add r0, sp, #S_OFF
b sys_rt_sigreturn
sys_sigaltstack_wrapper:
ldr r2, [sp, #S_OFF + S_SP]
b do_sigaltstack
/*
* Note: off_4k (r5) is always units of 4K. If we can't do the requested
* offset, we return EINVAL. FIXME - this lost some stuff from arm32 to
* ifdefs. check it out.
*/
sys_mmap2:
tst r5, #((1 << (PAGE_SHIFT - 12)) - 1)
moveq r5, r5, lsr #PAGE_SHIFT - 12
streq r5, [sp, #4]
beq do_mmap2
mov r0, #-EINVAL
RETINSTR(mov,pc, lr)
/*
* Design issues:
* - We have several modes that each vector can be called from,
* each with its own set of registers. On entry to any vector,
* we *must* save the registers used in *that* mode.
*
* - This code must be as fast as possible.
*
* There are a few restrictions on the vectors:
* - the SWI vector cannot be called from *any* non-user mode
*
* - the FP emulator is *never* called from *any* non-user mode undefined
* instruction.
*
*/
.text
.macro handle_irq
1: mov r4, #IOC_BASE
ldrb r6, [r4, #0x24] @ get high priority first
adr r5, irq_prio_h
teq r6, #0
ldreqb r6, [r4, #0x14] @ get low priority
adreq r5, irq_prio_l
teq r6, #0 @ If an IRQ happened...
ldrneb r0, [r5, r6] @ get IRQ number
movne r1, sp @ get struct pt_regs
adrne lr, 1b @ Set return address to 1b
orrne lr, lr, #PSR_I_BIT | MODE_SVC26 @ (and force SVC mode)
bne asm_do_IRQ @ process IRQ (if asserted)
.endm
/*
* Interrupt table (incorporates priority)
*/
.macro irq_prio_table
irq_prio_l: .byte 0, 0, 1, 0, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3
.byte 4, 0, 1, 0, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3
.byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
.byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
.byte 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3
.byte 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3
.byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
.byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
.byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
irq_prio_h: .byte 0, 8, 9, 8,10,10,10,10,11,11,11,11,10,10,10,10
.byte 12, 8, 9, 8,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 14,14,14,14,10,10,10,10,11,11,11,11,10,10,10,10
.byte 14,14,14,14,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
.byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
.byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
.endm
#if 1
/*
* Uncomment these if you wish to get more debugging into about data aborts.
* FIXME - I bet we can find a way to encode these and keep performance.
*/
#define FAULT_CODE_LDRSTRPOST 0x80
#define FAULT_CODE_LDRSTRPRE 0x40
#define FAULT_CODE_LDRSTRREG 0x20
#define FAULT_CODE_LDMSTM 0x10
#define FAULT_CODE_LDCSTC 0x08
#endif
#define FAULT_CODE_PREFETCH 0x04
#define FAULT_CODE_WRITE 0x02
#define FAULT_CODE_FORCECOW 0x01
/*=============================================================================
* Undefined FIQs
*-----------------------------------------------------------------------------
*/
_unexp_fiq: ldr sp, .LCfiq
mov r12, #IOC_BASE
strb r12, [r12, #0x38] @ Disable FIQ register
teqp pc, #PSR_I_BIT | PSR_F_BIT | MODE_SVC26
mov r0, r0
stmfd sp!, {r0 - r3, ip, lr}
adr r0, Lfiqmsg
bl printk
ldmfd sp!, {r0 - r3, ip, lr}
teqp pc, #PSR_I_BIT | PSR_F_BIT | MODE_FIQ26
mov r0, r0
movs pc, lr
Lfiqmsg: .ascii "*** Unexpected FIQ\n\0"
.align
.LCfiq: .word __temp_fiq
.LCirq: .word __temp_irq
/*=============================================================================
* Undefined instruction handler
*-----------------------------------------------------------------------------
* Handles floating point instructions
*/
vector_undefinstr:
tst lr, #MODE_SVC26 @ did we come from a non-user mode?
bne __und_svc @ yes - deal with it.
/* Otherwise, fall through for the user-space (common) case. */
save_user_regs
zero_fp @ zero frame pointer
teqp pc, #PSR_I_BIT | MODE_SVC26 @ disable IRQs
.Lbug_undef:
ldr r4, .LC2
ldr pc, [r4] @ Call FP module entry point
/* FIXME - should we trap for a null pointer here? */
/* The SVC mode case */
__und_svc: save_svc_regs @ Non-user mode
mask_pc r0, lr
and r2, lr, #3
sub r0, r0, #4
mov r1, sp
bl do_undefinstr
restore_svc_regs
/* We get here if the FP emulator doesnt handle the undef instr.
* If the insn WAS handled, the emulator jumps to ret_from_exception by itself/
*/
.globl fpundefinstr
fpundefinstr:
mov r0, lr
mov r1, sp
teqp pc, #MODE_SVC26
bl do_undefinstr
b ret_from_exception @ Normal FP exit
#if defined CONFIG_FPE_NWFPE || defined CONFIG_FPE_FASTFPE
/* The FPE is always present */
.equ fpe_not_present, 0
#else
/* We get here if an undefined instruction happens and the floating
* point emulator is not present. If the offending instruction was
* a WFS, we just perform a normal return as if we had emulated the
* operation. This is a hack to allow some basic userland binaries
* to run so that the emulator module proper can be loaded. --philb
* FIXME - probably a broken useless hack...
*/
fpe_not_present:
adr r10, wfs_mask_data
ldmia r10, {r4, r5, r6, r7, r8}
ldr r10, [sp, #S_PC] @ Load PC
sub r10, r10, #4
mask_pc r10, r10
ldrt r10, [r10] @ get instruction
and r5, r10, r5
teq r5, r4 @ Is it WFS?
beq ret_from_exception
and r5, r10, r8
teq r5, r6 @ Is it LDF/STF on sp or fp?
teqne r5, r7
bne fpundefinstr
tst r10, #0x00200000 @ Does it have WB
beq ret_from_exception
and r4, r10, #255 @ get offset
and r6, r10, #0x000f0000
tst r10, #0x00800000 @ +/-
ldr r5, [sp, r6, lsr #14] @ Load reg
rsbeq r4, r4, #0
add r5, r5, r4, lsl #2
str r5, [sp, r6, lsr #14] @ Save reg
b ret_from_exception
wfs_mask_data: .word 0x0e200110 @ WFS/RFS
.word 0x0fef0fff
.word 0x0d0d0100 @ LDF [sp]/STF [sp]
.word 0x0d0b0100 @ LDF [fp]/STF [fp]
.word 0x0f0f0f00
#endif
.LC2: .word fp_enter
/*=============================================================================
* Prefetch abort handler
*-----------------------------------------------------------------------------
*/
#define DEBUG_UNDEF
/* remember: lr = USR pc */
vector_prefetch:
sub lr, lr, #4
tst lr, #MODE_SVC26
bne __pabt_invalid
save_user_regs
teqp pc, #MODE_SVC26 @ Enable IRQs...
mask_pc r0, lr @ Address of abort
mov r1, sp @ Tasks registers
bl do_PrefetchAbort
teq r0, #0 @ If non-zero, we believe this abort..
bne ret_from_exception
#ifdef DEBUG_UNDEF
adr r0, t
bl printk
#endif
ldr lr, [sp,#S_PC] @ FIXME program to test this on. I think its
b .Lbug_undef @ broken at the moment though!)
__pabt_invalid: save_svc_regs
mov r0, sp @ Prefetch aborts are definitely *not*
mov r1, #BAD_PREFETCH @ allowed in non-user modes. We cant
and r2, lr, #3 @ recover from this problem.
b bad_mode
#ifdef DEBUG_UNDEF
t: .ascii "*** undef ***\r\n\0"
.align
#endif
/*=============================================================================
* Address exception handler
*-----------------------------------------------------------------------------
* These aren't too critical.
* (they're not supposed to happen).
* In order to debug the reason for address exceptions in non-user modes,
* we have to obtain all the registers so that we can see what's going on.
*/
vector_addrexcptn:
sub lr, lr, #8
tst lr, #3
bne Laddrexcptn_not_user
save_user_regs
teq pc, #MODE_SVC26
mask_pc r0, lr @ Point to instruction
mov r1, sp @ Point to registers
mov r2, #0x400
mov lr, pc
bl do_excpt
b ret_from_exception
Laddrexcptn_not_user:
save_svc_regs
and r2, lr, #3
teq r2, #3
bne Laddrexcptn_illegal_mode
teqp pc, #MODE_SVC26
mask_pc r0, lr
mov r1, sp
orr r2, r2, #0x400
bl do_excpt
ldmia sp, {r0 - lr} @ I cant remember the reason I changed this...
add sp, sp, #15*4
movs pc, lr
Laddrexcptn_illegal_mode:
mov r0, sp
str lr, [sp, #-4]!
orr r1, r2, #PSR_I_BIT | PSR_F_BIT
teqp r1, #0 @ change into mode (wont be user mode)
mov r0, r0
mov r1, r8 @ Any register from r8 - r14 can be banked
mov r2, r9
mov r3, r10
mov r4, r11
mov r5, r12
mov r6, r13
mov r7, r14
teqp pc, #PSR_F_BIT | MODE_SVC26 @ back to svc
mov r0, r0
stmfd sp!, {r1-r7}
ldmia r0, {r0-r7}
stmfd sp!, {r0-r7}
mov r0, sp
mov r1, #BAD_ADDREXCPTN
b bad_mode
/*=============================================================================
* Interrupt (IRQ) handler
*-----------------------------------------------------------------------------
* Note: if the IRQ was taken whilst in user mode, then *no* kernel routine
* is running, so do not have to save svc lr.
*
* Entered in IRQ mode.
*/
vector_IRQ: ldr sp, .LCirq @ Setup some temporary stack
sub lr, lr, #4
str lr, [sp] @ push return address
tst lr, #3
bne __irq_non_usr
__irq_usr: teqp pc, #PSR_I_BIT | MODE_SVC26 @ Enter SVC mode
mov r0, r0
ldr lr, .LCirq
ldr lr, [lr] @ Restore lr for jump back to USR
save_user_regs
handle_irq
mov why, #0
get_thread_info tsk
b ret_to_user
@ Place the IRQ priority table here so that the handle_irq macros above
@ and below here can access it.
irq_prio_table
__irq_non_usr: teqp pc, #PSR_I_BIT | MODE_SVC26 @ Enter SVC mode
mov r0, r0
save_svc_regs_irq
and r2, lr, #3
teq r2, #3
bne __irq_invalid @ IRQ not from SVC mode
handle_irq
restore_svc_regs
__irq_invalid: mov r0, sp
mov r1, #BAD_IRQ
b bad_mode
/*=============================================================================
* Data abort handler code
*-----------------------------------------------------------------------------
*
* This handles both exceptions from user and SVC modes, computes the address
* range of the problem, and does any correction that is required. It then
* calls the kernel data abort routine.
*
* This is where I wish that the ARM would tell you which address aborted.
*/
vector_data: sub lr, lr, #8 @ Correct lr
tst lr, #3
bne Ldata_not_user
save_user_regs
teqp pc, #MODE_SVC26
mask_pc r0, lr
bl Ldata_do
b ret_from_exception
Ldata_not_user:
save_svc_regs
and r2, lr, #3
teq r2, #3
bne Ldata_illegal_mode
tst lr, #PSR_I_BIT
teqeqp pc, #MODE_SVC26
mask_pc r0, lr
bl Ldata_do
restore_svc_regs
Ldata_illegal_mode:
mov r0, sp
mov r1, #BAD_DATA
b bad_mode
Ldata_do: mov r3, sp
ldr r4, [r0] @ Get instruction
mov r2, #0
tst r4, #1 << 20 @ Check to see if it is a write instruction
orreq r2, r2, #FAULT_CODE_WRITE @ Indicate write instruction
mov r1, r4, lsr #22 @ Now branch to the relevent processing routine
and r1, r1, #15 << 2
add pc, pc, r1
movs pc, lr
b Ldata_unknown
b Ldata_unknown
b Ldata_unknown
b Ldata_unknown
b Ldata_ldrstr_post @ ldr rd, [rn], #m
b Ldata_ldrstr_numindex @ ldr rd, [rn, #m] @ RegVal
b Ldata_ldrstr_post @ ldr rd, [rn], rm
b Ldata_ldrstr_regindex @ ldr rd, [rn, rm]
b Ldata_ldmstm @ ldm*a rn, <rlist>
b Ldata_ldmstm @ ldm*b rn, <rlist>
b Ldata_unknown
b Ldata_unknown
b Ldata_ldrstr_post @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
b Ldata_ldcstc_pre @ ldc rd, [rn, #m]
b Ldata_unknown
Ldata_unknown: @ Part of jumptable
mov r0, r1
mov r1, r4
mov r2, r3
b baddataabort
Ldata_ldrstr_post:
mov r0, r4, lsr #14 @ Get Rn
and r0, r0, #15 << 2 @ Mask out reg.
teq r0, #15 << 2
ldr r0, [r3, r0] @ Get register
biceq r0, r0, #PCMASK
mov r1, r0
#ifdef FAULT_CODE_LDRSTRPOST
orr r2, r2, #FAULT_CODE_LDRSTRPOST
#endif
b do_DataAbort
Ldata_ldrstr_numindex:
mov r0, r4, lsr #14 @ Get Rn
and r0, r0, #15 << 2 @ Mask out reg.
teq r0, #15 << 2
ldr r0, [r3, r0] @ Get register
mov r1, r4, lsl #20
biceq r0, r0, #PCMASK
tst r4, #1 << 23
addne r0, r0, r1, lsr #20
subeq r0, r0, r1, lsr #20
mov r1, r0
#ifdef FAULT_CODE_LDRSTRPRE
orr r2, r2, #FAULT_CODE_LDRSTRPRE
#endif
b do_DataAbort
Ldata_ldrstr_regindex:
mov r0, r4, lsr #14 @ Get Rn
and r0, r0, #15 << 2 @ Mask out reg.
teq r0, #15 << 2
ldr r0, [r3, r0] @ Get register
and r7, r4, #15
biceq r0, r0, #PCMASK
teq r7, #15 @ Check for PC
ldr r7, [r3, r7, lsl #2] @ Get Rm
and r8, r4, #0x60 @ Get shift types
biceq r7, r7, #PCMASK
mov r9, r4, lsr #7 @ Get shift amount
and r9, r9, #31
teq r8, #0
moveq r7, r7, lsl r9
teq r8, #0x20 @ LSR shift
moveq r7, r7, lsr r9
teq r8, #0x40 @ ASR shift
moveq r7, r7, asr r9
teq r8, #0x60 @ ROR shift
moveq r7, r7, ror r9
tst r4, #1 << 23
addne r0, r0, r7
subeq r0, r0, r7 @ Apply correction
mov r1, r0
#ifdef FAULT_CODE_LDRSTRREG
orr r2, r2, #FAULT_CODE_LDRSTRREG
#endif
b do_DataAbort
Ldata_ldmstm:
mov r7, #0x11
orr r7, r7, r7, lsl #8
and r0, r4, r7
and r1, r4, r7, lsl #1
add r0, r0, r1, lsr #1
and r1, r4, r7, lsl #2
add r0, r0, r1, lsr #2
and r1, r4, r7, lsl #3
add r0, r0, r1, lsr #3
add r0, r0, r0, lsr #8
add r0, r0, r0, lsr #4
and r7, r0, #15 @ r7 = no. of registers to transfer.
mov r5, r4, lsr #14 @ Get Rn
and r5, r5, #15 << 2
ldr r0, [r3, r5] @ Get reg
eor r6, r4, r4, lsl #2
tst r6, #1 << 23 @ Check inc/dec ^ writeback
rsbeq r7, r7, #0
add r7, r0, r7, lsl #2 @ Do correction (signed)
subne r1, r7, #1
subeq r1, r0, #1
moveq r0, r7
tst r4, #1 << 21 @ Check writeback
strne r7, [r3, r5]
eor r6, r4, r4, lsl #1
tst r6, #1 << 24 @ Check Pre/Post ^ inc/dec
addeq r0, r0, #4
addeq r1, r1, #4
teq r5, #15*4 @ CHECK FOR PC
biceq r1, r1, #PCMASK
biceq r0, r0, #PCMASK
#ifdef FAULT_CODE_LDMSTM
orr r2, r2, #FAULT_CODE_LDMSTM
#endif
b do_DataAbort
Ldata_ldcstc_pre:
mov r0, r4, lsr #14 @ Get Rn
and r0, r0, #15 << 2 @ Mask out reg.
teq r0, #15 << 2
ldr r0, [r3, r0] @ Get register
mov r1, r4, lsl #24 @ Get offset
biceq r0, r0, #PCMASK
tst r4, #1 << 23
addne r0, r0, r1, lsr #24
subeq r0, r0, r1, lsr #24
mov r1, r0
#ifdef FAULT_CODE_LDCSTC
orr r2, r2, #FAULT_CODE_LDCSTC
#endif
b do_DataAbort
/*
* This is the return code to user mode for abort handlers
*/
ENTRY(ret_from_exception)
get_thread_info tsk
mov why, #0
b ret_to_user
.data
ENTRY(fp_enter)
.word fpe_not_present
.text
/*
* Register switch for older 26-bit only ARMs
*/
ENTRY(__switch_to)
add r0, r0, #TI_CPU_SAVE
stmia r0, {r4 - sl, fp, sp, lr}
add r1, r1, #TI_CPU_SAVE
ldmia r1, {r4 - sl, fp, sp, pc}^
/*
*=============================================================================
* Low-level interface code
*-----------------------------------------------------------------------------
* Trap initialisation
*-----------------------------------------------------------------------------
*
* Note - FIQ code has changed. The default is a couple of words in 0x1c, 0x20
* that call _unexp_fiq. Nowever, we now copy the FIQ routine to 0x1c (removes
* some excess cycles).
*
* What we need to put into 0-0x1c are branches to branch to the kernel.
*/
.section ".init.text",#alloc,#execinstr
.Ljump_addresses:
swi SYS_ERROR0
.word vector_undefinstr - 12
.word vector_swi - 16
.word vector_prefetch - 20
.word vector_data - 24
.word vector_addrexcptn - 28
.word vector_IRQ - 32
.word _unexp_fiq - 36
b . + 8
/*
* initialise the trap system
*/
ENTRY(__trap_init)
stmfd sp!, {r4 - r7, lr}
adr r1, .Ljump_addresses
ldmia r1, {r1 - r7, ip, lr}
orr r2, lr, r2, lsr #2
orr r3, lr, r3, lsr #2
orr r4, lr, r4, lsr #2
orr r5, lr, r5, lsr #2
orr r6, lr, r6, lsr #2
orr r7, lr, r7, lsr #2
orr ip, lr, ip, lsr #2
mov r0, #0
stmia r0, {r1 - r7, ip}
ldmfd sp!, {r4 - r7, pc}^
.bss
__temp_irq: .space 4 @ saved lr_irq
__temp_fiq: .space 128

201
arch/arm26/kernel/fiq.c
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@ -1,201 +0,0 @@
/*
* linux/arch/arm26/kernel/fiq.c
*
* Copyright (C) 1998 Russell King
* Copyright (C) 1998, 1999 Phil Blundell
* Copyright (C) 2003 Ian Molton
*
* FIQ support written by Philip Blundell <philb@gnu.org>, 1998.
*
* FIQ support re-written by Russell King to be more generic
*
* We now properly support a method by which the FIQ handlers can
* be stacked onto the vector. We still do not support sharing
* the FIQ vector itself.
*
* Operation is as follows:
* 1. Owner A claims FIQ:
* - default_fiq relinquishes control.
* 2. Owner A:
* - inserts code.
* - sets any registers,
* - enables FIQ.
* 3. Owner B claims FIQ:
* - if owner A has a relinquish function.
* - disable FIQs.
* - saves any registers.
* - returns zero.
* 4. Owner B:
* - inserts code.
* - sets any registers,
* - enables FIQ.
* 5. Owner B releases FIQ:
* - Owner A is asked to reacquire FIQ:
* - inserts code.
* - restores saved registers.
* - enables FIQ.
* 6. Goto 3
*/
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <asm/fiq.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgalloc.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#define FIQ_VECTOR (vectors_base() + 0x1c)
static unsigned long no_fiq_insn;
#define unprotect_page_0()
#define protect_page_0()
/* Default reacquire function
* - we always relinquish FIQ control
* - we always reacquire FIQ control
*/
static int fiq_def_op(void *ref, int relinquish)
{
if (!relinquish) {
unprotect_page_0();
*(unsigned long *)FIQ_VECTOR = no_fiq_insn;
protect_page_0();
}
return 0;
}
static struct fiq_handler default_owner = {
.name = "default",
.fiq_op = fiq_def_op,
};
static struct fiq_handler *current_fiq = &default_owner;
int show_fiq_list(struct seq_file *p, void *v)
{
if (current_fiq != &default_owner)
seq_printf(p, "FIQ: %s\n", current_fiq->name);
return 0;
}
void set_fiq_handler(void *start, unsigned int length)
{
unprotect_page_0();
memcpy((void *)FIQ_VECTOR, start, length);
protect_page_0();
}
/*
* Taking an interrupt in FIQ mode is death, so both these functions
* disable irqs for the duration.
*/
void set_fiq_regs(struct pt_regs *regs)
{
register unsigned long tmp, tmp2;
__asm__ volatile (
"mov %0, pc \n"
"bic %1, %0, #0x3 \n"
"orr %1, %1, %3 \n"
"teqp %1, #0 @ select FIQ mode \n"
"mov r0, r0 \n"
"ldmia %2, {r8 - r14} \n"
"teqp %0, #0 @ return to SVC mode \n"
"mov r0, r0 "
: "=&r" (tmp), "=&r" (tmp2)
: "r" (&regs->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | MODE_FIQ26)
/* These registers aren't modified by the above code in a way
visible to the compiler, but we mark them as clobbers anyway
so that GCC won't put any of the input or output operands in
them. */
: "r8", "r9", "r10", "r11", "r12", "r13", "r14");
}
void get_fiq_regs(struct pt_regs *regs)
{
register unsigned long tmp, tmp2;
__asm__ volatile (
"mov %0, pc \n"
"bic %1, %0, #0x3 \n"
"orr %1, %1, %3 \n"
"teqp %1, #0 @ select FIQ mode \n"
"mov r0, r0 \n"
"stmia %2, {r8 - r14} \n"
"teqp %0, #0 @ return to SVC mode \n"
"mov r0, r0 "
: "=&r" (tmp), "=&r" (tmp2)
: "r" (&regs->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | MODE_FIQ26)
/* These registers aren't modified by the above code in a way
visible to the compiler, but we mark them as clobbers anyway
so that GCC won't put any of the input or output operands in
them. */
: "r8", "r9", "r10", "r11", "r12", "r13", "r14");
}
int claim_fiq(struct fiq_handler *f)
{
int ret = 0;
if (current_fiq) {
ret = -EBUSY;
if (current_fiq->fiq_op != NULL)
ret = current_fiq->fiq_op(current_fiq->dev_id, 1);
}
if (!ret) {
f->next = current_fiq;
current_fiq = f;
}
return ret;
}
void release_fiq(struct fiq_handler *f)
{
if (current_fiq != f) {
printk(KERN_ERR "%s FIQ trying to release %s FIQ\n",
f->name, current_fiq->name);
#ifdef CONFIG_DEBUG_ERRORS
__backtrace();
#endif
return;
}
do
current_fiq = current_fiq->next;
while (current_fiq->fiq_op(current_fiq->dev_id, 0));
}
void enable_fiq(int fiq)
{
enable_irq(fiq + FIQ_START);
}
void disable_fiq(int fiq)
{
disable_irq(fiq + FIQ_START);
}
EXPORT_SYMBOL(set_fiq_handler);
EXPORT_SYMBOL(set_fiq_regs);
EXPORT_SYMBOL(get_fiq_regs);
EXPORT_SYMBOL(claim_fiq);
EXPORT_SYMBOL(release_fiq);
EXPORT_SYMBOL(enable_fiq);
EXPORT_SYMBOL(disable_fiq);
void __init init_FIQ(void)
{
no_fiq_insn = *(unsigned long *)FIQ_VECTOR;
set_fs(get_fs());
}

112
arch/arm26/kernel/head.S
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@ -1,112 +0,0 @@
/*
* linux/arch/arm26/kernel/head.S
*
* Copyright (C) 1994-2000 Russell King
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 26-bit kernel startup code
*/
#include <linux/linkage.h>
#include <asm/mach-types.h>
.globl swapper_pg_dir
.equ swapper_pg_dir, 0x0207d000
/*
* Entry point.
*/
.section ".init.text",#alloc,#execinstr
ENTRY(stext)
__entry:
cmp pc, #0x02000000
ldrlt pc, LC0 @ if 0x01800000, call at 0x02080000
teq r0, #0 @ Check for old calling method
blne oldparams @ Move page if old
adr r0, LC0
ldmib r0, {r2-r5, sp} @ Setup stack (and fetch other values)
mov r0, #0 @ Clear BSS
1: cmp r2, r3
strcc r0, [r2], #4
bcc 1b
bl detect_proc_type
str r0, [r4]
bl detect_arch_type
str r0, [r5]
#ifdef CONFIG_XIP_KERNEL
ldr r3, ETEXT @ data section copy
ldr r4, SDATA
ldr r5, EDATA
1:
ldr r6, [r3], #4
str r6, [r4], #4
cmp r4, r5
blt 1b
#endif
mov fp, #0
b start_kernel
LC0: .word _stext
.word __bss_start @ r2
.word _end @ r3
.word processor_id @ r4
.word __machine_arch_type @ r5
.word init_thread_union+8192 @ sp
#ifdef CONFIG_XIP_KERNEL
ETEXT: .word _endtext
SDATA: .word _sdata
EDATA: .word __bss_start
#endif
arm2_id: .long 0x41560200 @ ARM2 and 250 dont have a CPUID
arm250_id: .long 0x41560250 @ So we create some after probing for them
.align
oldparams: mov r4, #0x02000000
add r3, r4, #0x00080000
add r4, r4, #0x0007c000
1: ldmia r0!, {r5 - r12}
stmia r4!, {r5 - r12}
cmp r4, r3
blt 1b
mov pc, lr
/*
* We need some way to automatically detect the difference between
* these two machines. Unfortunately, it is not possible to detect
* the presence of the SuperIO chip, because that will hang the old
* Archimedes machines solid.
*/
/* DAG: Outdated, these have been combined !!!!!!! */
detect_arch_type:
#if defined(CONFIG_ARCH_ARC)
mov r0, #MACH_TYPE_ARCHIMEDES
#elif defined(CONFIG_ARCH_A5K)
mov r0, #MACH_TYPE_A5K
#endif
mov pc, lr
detect_proc_type:
mov ip, lr
mov r2, #0xea000000 @ Point undef instr to continuation
adr r0, continue - 12
orr r0, r2, r0, lsr #2
mov r1, #0
str r0, [r1, #4]
ldr r0, arm2_id
swp r2, r2, [r1] @ check for swp (ARM2 cant)
ldr r0, arm250_id
mrc 15, 0, r3, c0, c0 @ check for CP#15 (ARM250 cant)
mov r0, r3
continue: mov r2, #0xeb000000 @ Make undef vector loop
sub r2, r2, #2
str r2, [r1, #4]
mov pc, ip

49
arch/arm26/kernel/init_task.c
View File

@ -1,49 +0,0 @@
/*
* linux/arch/arm26/kernel/init_task.c
*
* Copyright (C) 2003 Ian Molton
*
*/
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/init_task.h>
#include <linux/mqueue.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
static struct fs_struct init_fs = INIT_FS;
static struct files_struct init_files = INIT_FILES;
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
struct mm_struct init_mm = INIT_MM(init_mm);
EXPORT_SYMBOL(init_mm);
/*
* Initial thread structure.
*
* We need to make sure that this is 8192-byte aligned due to the
* way process stacks are handled. This is done by making sure
* the linker maps this in the .text segment right after head.S,
* and making the linker scripts ensure the proper alignment.
*
* FIXME - should this be 32K alignment on arm26?
*
* The things we do for performance...
*/
union thread_union init_thread_union
__attribute__((__section__(".init.task"))) =
{ INIT_THREAD_INFO(init_task) };
/*
* Initial task structure.
*
* All other task structs will be allocated on slabs in fork.c
*/
struct task_struct init_task = INIT_TASK(init_task);
EXPORT_SYMBOL(init_task);

722
arch/arm26/kernel/irq.c
View File

@ -1,722 +0,0 @@
/*
* linux/arch/arm/kernel/irq.c
*
* Copyright (C) 1992 Linus Torvalds
* Modifications for ARM processor Copyright (C) 1995-2000 Russell King.
* 'Borrowed' for ARM26 and (C) 2003 Ian Molton.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This file contains the code used by various IRQ handling routines:
* asking for different IRQ's should be done through these routines
* instead of just grabbing them. Thus setups with different IRQ numbers
* shouldn't result in any weird surprises, and installing new handlers
* should be easier.
*
* IRQ's are in fact implemented a bit like signal handlers for the kernel.
* Naturally it's not a 1:1 relation, but there are similarities.
*/
#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/errno.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/irqchip.h>
//FIXME - this ought to be in a header IMO
void __init arc_init_irq(void);
/*
* Maximum IRQ count. Currently, this is arbitary. However, it should
* not be set too low to prevent false triggering. Conversely, if it
* is set too high, then you could miss a stuck IRQ.
*
* FIXME Maybe we ought to set a timer and re-enable the IRQ at a later time?
*/
#define MAX_IRQ_CNT 100000
static volatile unsigned long irq_err_count;
static DEFINE_SPINLOCK(irq_controller_lock);
struct irqdesc irq_desc[NR_IRQS];
/*
* Dummy mask/unmask handler
*/
void dummy_mask_unmask_irq(unsigned int irq)
{
}
void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
irq_err_count += 1;
printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
}
static struct irqchip bad_chip = {
.ack = dummy_mask_unmask_irq,
.mask = dummy_mask_unmask_irq,
.unmask = dummy_mask_unmask_irq,
};
static struct irqdesc bad_irq_desc = {
.chip = &bad_chip,
.handle = do_bad_IRQ,
.depth = 1,
};
/**
* disable_irq - disable an irq and wait for completion
* @irq: Interrupt to disable
*
* Disable the selected interrupt line. We do this lazily.
*
* This function may be called from IRQ context.
*/
void disable_irq(unsigned int irq)
{
struct irqdesc *desc = irq_desc + irq;
unsigned long flags;
spin_lock_irqsave(&irq_controller_lock, flags);
if (!desc->depth++)
desc->enabled = 0;
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
EXPORT_SYMBOL(disable_irq);
void disable_irq_nosync(unsigned int irq) __attribute__((alias("disable_irq")));
EXPORT_SYMBOL(disable_irq_nosync);
/**
* enable_irq - enable interrupt handling on an irq
* @irq: Interrupt to enable
*
* Re-enables the processing of interrupts on this IRQ line.
* Note that this may call the interrupt handler, so you may
* get unexpected results if you hold IRQs disabled.
*
* This function may be called from IRQ context.
*/
void enable_irq(unsigned int irq)
{
struct irqdesc *desc = irq_desc + irq;
unsigned long flags;
int pending = 0;
spin_lock_irqsave(&irq_controller_lock, flags);
if (unlikely(!desc->depth)) {
printk("enable_irq(%u) unbalanced from %p\n", irq,
__builtin_return_address(0)); //FIXME bum addresses reported - why?
} else if (!--desc->depth) {
desc->probing = 0;
desc->enabled = 1;
desc->chip->unmask(irq);
pending = desc->pending;
desc->pending = 0;
/*
* If the interrupt was waiting to be processed,
* retrigger it.
*/
if (pending)
desc->chip->rerun(irq);
}
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
EXPORT_SYMBOL(enable_irq);
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v;
struct irqaction * action;
if (i < NR_IRQS) {
action = irq_desc[i].action;
if (!action)
goto out;
seq_printf(p, "%3d: %10u ", i, kstat_irqs(i));
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next) {
seq_printf(p, ", %s", action->name);
}
seq_putc(p, '\n');
} else if (i == NR_IRQS) {
show_fiq_list(p, v);
seq_printf(p, "Err: %10lu\n", irq_err_count);
}
out:
return 0;
}
/*
* IRQ lock detection.
*
* Hopefully, this should get us out of a few locked situations.
* However, it may take a while for this to happen, since we need
* a large number if IRQs to appear in the same jiffie with the
* same instruction pointer (or within 2 instructions).
*/
static int check_irq_lock(struct irqdesc *desc, int irq, struct pt_regs *regs)
{
unsigned long instr_ptr = instruction_pointer(regs);
if (desc->lck_jif == jiffies &&
desc->lck_pc >= instr_ptr && desc->lck_pc < instr_ptr + 8) {
desc->lck_cnt += 1;
if (desc->lck_cnt > MAX_IRQ_CNT) {
printk(KERN_ERR "IRQ LOCK: IRQ%d is locking the system, disabled\n", irq);
return 1;
}
} else {
desc->lck_cnt = 0;
desc->lck_pc = instruction_pointer(regs);
desc->lck_jif = jiffies;
}
return 0;
}
static void
__do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
{
unsigned int status;
int ret;
spin_unlock(&irq_controller_lock);
if (!(action->flags & IRQF_DISABLED))
local_irq_enable();
status = 0;
do {
ret = action->handler(irq, action->dev_id, regs);
if (ret == IRQ_HANDLED)
status |= action->flags;
action = action->next;
} while (action);
if (status & IRQF_SAMPLE_RANDOM)
add_interrupt_randomness(irq);
spin_lock_irq(&irq_controller_lock);
}
/*
* This is for software-decoded IRQs. The caller is expected to
* handle the ack, clear, mask and unmask issues.
*/
void
do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
struct irqaction *action;
const int cpu = smp_processor_id();
desc->triggered = 1;
kstat_cpu(cpu).irqs[irq]++;
action = desc->action;
if (action)
__do_irq(irq, desc->action, regs);
}
/*
* Most edge-triggered IRQ implementations seem to take a broken
* approach to this. Hence the complexity.
*/
void
do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
const int cpu = smp_processor_id();
desc->triggered = 1;
/*
* If we're currently running this IRQ, or its disabled,
* we shouldn't process the IRQ. Instead, turn on the
* hardware masks.
*/
if (unlikely(desc->running || !desc->enabled))
goto running;
/*
* Acknowledge and clear the IRQ, but don't mask it.
*/
desc->chip->ack(irq);
/*
* Mark the IRQ currently in progress.
*/
desc->running = 1;
kstat_cpu(cpu).irqs[irq]++;
do {
struct irqaction *action;
action = desc->action;
if (!action)
break;
if (desc->pending && desc->enabled) {
desc->pending = 0;
desc->chip->unmask(irq);
}
__do_irq(irq, action, regs);
} while (desc->pending);
desc->running = 0;
/*
* If we were disabled or freed, shut down the handler.
*/
if (likely(desc->action && !check_irq_lock(desc, irq, regs)))
return;
running:
/*
* We got another IRQ while this one was masked or
* currently running. Delay it.
*/
desc->pending = 1;
desc->chip->mask(irq);
desc->chip->ack(irq);
}
/*
* Level-based IRQ handler. Nice and simple.
*/
void
do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
struct irqaction *action;
const int cpu = smp_processor_id();
desc->triggered = 1;
/*
* Acknowledge, clear _AND_ disable the interrupt.
*/
desc->chip->ack(irq);
if (likely(desc->enabled)) {
kstat_cpu(cpu).irqs[irq]++;
/*
* Return with this interrupt masked if no action
*/
action = desc->action;
if (action) {
__do_irq(irq, desc->action, regs);
if (likely(desc->enabled &&
!check_irq_lock(desc, irq, regs)))
desc->chip->unmask(irq);
}
}
}
/*
* do_IRQ handles all hardware IRQ's. Decoded IRQs should not
* come via this function. Instead, they should provide their
* own 'handler'
*/
asmlinkage void asm_do_IRQ(int irq, struct pt_regs *regs)
{
struct irqdesc *desc = irq_desc + irq;
/*
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
if (irq >= NR_IRQS)
desc = &bad_irq_desc;
irq_enter();
spin_lock(&irq_controller_lock);
desc->handle(irq, desc, regs);
spin_unlock(&irq_controller_lock);
irq_exit();
}
void __set_irq_handler(unsigned int irq, irq_handler_t handle, int is_chained)
{
struct irqdesc *desc;
unsigned long flags;
if (irq >= NR_IRQS) {
printk(KERN_ERR "Trying to install handler for IRQ%d\n", irq);
return;
}
if (handle == NULL)
handle = do_bad_IRQ;
desc = irq_desc + irq;
if (is_chained && desc->chip == &bad_chip)
printk(KERN_WARNING "Trying to install chained handler for IRQ%d\n", irq);
spin_lock_irqsave(&irq_controller_lock, flags);
if (handle == do_bad_IRQ) {
desc->chip->mask(irq);
desc->chip->ack(irq);
desc->depth = 1;
desc->enabled = 0;
}
desc->handle = handle;
if (handle != do_bad_IRQ && is_chained) {
desc->valid = 0;
desc->probe_ok = 0;
desc->depth = 0;
desc->chip->unmask(irq);
}
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
void set_irq_chip(unsigned int irq, struct irqchip *chip)
{
struct irqdesc *desc;
unsigned long flags;
if (irq >= NR_IRQS) {
printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return;
}
if (chip == NULL)
chip = &bad_chip;
desc = irq_desc + irq;
spin_lock_irqsave(&irq_controller_lock, flags);
desc->chip = chip;
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
int set_irq_type(unsigned int irq, unsigned int type)
{
struct irqdesc *desc;
unsigned long flags;
int ret = -ENXIO;
if (irq >= NR_IRQS) {
printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
return -ENODEV;
}
desc = irq_desc + irq;
if (desc->chip->type) {
spin_lock_irqsave(&irq_controller_lock, flags);
ret = desc->chip->type(irq, type);
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
return ret;
}
void set_irq_flags(unsigned int irq, unsigned int iflags)
{
struct irqdesc *desc;
unsigned long flags;
if (irq >= NR_IRQS) {
printk(KERN_ERR "Trying to set irq flags for IRQ%d\n", irq);
return;
}
desc = irq_desc + irq;
spin_lock_irqsave(&irq_controller_lock, flags);
desc->valid = (iflags & IRQF_VALID) != 0;
desc->probe_ok = (iflags & IRQF_PROBE) != 0;
desc->noautoenable = (iflags & IRQF_NOAUTOEN) != 0;
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
int setup_irq(unsigned int irq, struct irqaction *new)
{
int shared = 0;
struct irqaction *old, **p;
unsigned long flags;
struct irqdesc *desc;
/*
* Some drivers like serial.c use request_irq() heavily,
* so we have to be careful not to interfere with a
* running system.
*/
if (new->flags & IRQF_SAMPLE_RANDOM) {
/*
* This function might sleep, we want to call it first,
* outside of the atomic block.
* Yes, this might clear the entropy pool if the wrong
* driver is attempted to be loaded, without actually
* installing a new handler, but is this really a problem,
* only the sysadmin is able to do this.
*/
rand_initialize_irq(irq);
}
/*
* The following block of code has to be executed atomically
*/
desc = irq_desc + irq;
spin_lock_irqsave(&irq_controller_lock, flags);
p = &desc->action;
if ((old = *p) != NULL) {
/* Can't share interrupts unless both agree to */
if (!(old->flags & new->flags & IRQF_SHARED)) {
spin_unlock_irqrestore(&irq_controller_lock, flags);
return -EBUSY;
}
/* add new interrupt at end of irq queue */
do {
p = &old->next;
old = *p;
} while (old);
shared = 1;
}
*p = new;
if (!shared) {
desc->probing = 0;
desc->running = 0;
desc->pending = 0;
desc->depth = 1;
if (!desc->noautoenable) {
desc->depth = 0;
desc->enabled = 1;
desc->chip->unmask(irq);
}
}
spin_unlock_irqrestore(&irq_controller_lock, flags);
return 0;
}
/**
* request_irq - allocate an interrupt line
* @irq: Interrupt line to allocate
* @handler: Function to be called when the IRQ occurs
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device
* @dev_id: A cookie passed back to the handler function
*
* This call allocates interrupt resources and enables the
* interrupt line and IRQ handling. From the point this
* call is made your handler function may be invoked. Since
* your handler function must clear any interrupt the board
* raises, you must take care both to initialise your hardware
* and to set up the interrupt handler in the right order.
*
* Dev_id must be globally unique. Normally the address of the
* device data structure is used as the cookie. Since the handler
* receives this value it makes sense to use it.
*
* If your interrupt is shared you must pass a non NULL dev_id
* as this is required when freeing the interrupt.
*
* Flags:
*
* IRQF_SHARED Interrupt is shared
*
* IRQF_DISABLED Disable local interrupts while processing
*
* IRQF_SAMPLE_RANDOM The interrupt can be used for entropy
*
*/
//FIXME - handler used to return void - whats the significance of the change?
int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
unsigned long irq_flags, const char * devname, void *dev_id)
{
unsigned long retval;
struct irqaction *action;
if (irq >= NR_IRQS || !irq_desc[irq].valid || !handler ||
(irq_flags & IRQF_SHARED && !dev_id))
return -EINVAL;
action = kmalloc(sizeof(struct irqaction), GFP_KERNEL);
if (!action)
return -ENOMEM;
action->handler = handler;
action->flags = irq_flags;
cpus_clear(action->mask);
action->name = devname;
action->next = NULL;
action->dev_id = dev_id;
retval = setup_irq(irq, action);
if (retval)
kfree(action);
return retval;
}
EXPORT_SYMBOL(request_irq);
/**
* free_irq - free an interrupt
* @irq: Interrupt line to free
* @dev_id: Device identity to free
*
* Remove an interrupt handler. The handler is removed and if the
* interrupt line is no longer in use by any driver it is disabled.
* On a shared IRQ the caller must ensure the interrupt is disabled
* on the card it drives before calling this function.
*
* This function may be called from interrupt context.
*/
void free_irq(unsigned int irq, void *dev_id)
{
struct irqaction * action, **p;
unsigned long flags;
if (irq >= NR_IRQS || !irq_desc[irq].valid) {
printk(KERN_ERR "Trying to free IRQ%d\n",irq);
#ifdef CONFIG_DEBUG_ERRORS
__backtrace();
#endif
return;
}
spin_lock_irqsave(&irq_controller_lock, flags);
for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next) {
if (action->dev_id != dev_id)
continue;
/* Found it - now free it */
*p = action->next;
kfree(action);
goto out;
}
printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
#ifdef CONFIG_DEBUG_ERRORS
__backtrace();
#endif
out:
spin_unlock_irqrestore(&irq_controller_lock, flags);
}
EXPORT_SYMBOL(free_irq);
/* Start the interrupt probing. Unlike other architectures,
* we don't return a mask of interrupts from probe_irq_on,
* but return the number of interrupts enabled for the probe.
* The interrupts which have been enabled for probing is
* instead recorded in the irq_desc structure.
*/
unsigned long probe_irq_on(void)
{
unsigned int i, irqs = 0;
unsigned long delay;
/*
* first snaffle up any unassigned but
* probe-able interrupts
*/
spin_lock_irq(&irq_controller_lock);
for (i = 0; i < NR_IRQS; i++) {
if (!irq_desc[i].probe_ok || irq_desc[i].action)
continue;
irq_desc[i].probing = 1;
irq_desc[i].triggered = 0;
if (irq_desc[i].chip->type)
irq_desc[i].chip->type(i, IRQT_PROBE);
irq_desc[i].chip->unmask(i);
irqs += 1;
}
spin_unlock_irq(&irq_controller_lock);
/*
* wait for spurious interrupts to mask themselves out again
*/
for (delay = jiffies + HZ/10; time_before(jiffies, delay); )
/* min 100ms delay */;
/*
* now filter out any obviously spurious interrupts
*/
spin_lock_irq(&irq_controller_lock);
for (i = 0; i < NR_IRQS; i++) {
if (irq_desc[i].probing && irq_desc[i].triggered) {
irq_desc[i].probing = 0;
irqs -= 1;
}
}
spin_unlock_irq(&irq_controller_lock);
return irqs;
}
EXPORT_SYMBOL(probe_irq_on);
/*
* Possible return values:
* >= 0 - interrupt number
* -1 - no interrupt/many interrupts
*/
int probe_irq_off(unsigned long irqs)
{
unsigned int i;
int irq_found = NO_IRQ;
/*
* look at the interrupts, and find exactly one
* that we were probing has been triggered
*/
spin_lock_irq(&irq_controller_lock);
for (i = 0; i < NR_IRQS; i++) {
if (irq_desc[i].probing &&
irq_desc[i].triggered) {
if (irq_found != NO_IRQ) {
irq_found = NO_IRQ;
goto out;
}
irq_found = i;
}
}
if (irq_found == -1)
irq_found = NO_IRQ;
out:
spin_unlock_irq(&irq_controller_lock);
return irq_found;
}
EXPORT_SYMBOL(probe_irq_off);
void __init init_irq_proc(void)
{
}
void __init init_IRQ(void)
{
struct irqdesc *desc;
extern void init_dma(void);
int irq;
for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++)
*desc = bad_irq_desc;
arc_init_irq();
init_dma();
}

392
arch/arm26/kernel/process.c
View File

@ -1,392 +0,0 @@
/*
* linux/arch/arm26/kernel/process.c
*
* Copyright (C) 2003 Ian Molton - adapted for ARM26
* Copyright (C) 1996-2000 Russell King - Converted to ARM.
* Origional Copyright (C) 1995 Linus Torvalds
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <stdarg.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/leds.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
extern const char *processor_modes[];
extern void setup_mm_for_reboot(char mode);
static volatile int hlt_counter;
void disable_hlt(void)
{
hlt_counter++;
}
EXPORT_SYMBOL(disable_hlt);
void enable_hlt(void)
{
hlt_counter--;
}
EXPORT_SYMBOL(enable_hlt);
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
return 1;
}
static int __init hlt_setup(char *__unused)
{
hlt_counter = 0;
return 1;
}
__setup("nohlt", nohlt_setup);
__setup("hlt", hlt_setup);
/*
* This is our default idle handler. We need to disable
* interrupts here to ensure we don't miss a wakeup call.
*/
void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched())
cpu_relax();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
static char reboot_mode = 'h';
int __init reboot_setup(char *str)
{
reboot_mode = str[0];
return 1;
}
__setup("reboot=", reboot_setup);
/* ARM26 cant do these but we still need to define them. */
void machine_halt(void)
{
}
void machine_power_off(void)
{
}
void machine_restart(char * __unused)
{
/*
* Clean and disable cache, and turn off interrupts
*/
cpu_proc_fin();
/*
* Tell the mm system that we are going to reboot -
* we may need it to insert some 1:1 mappings so that
* soft boot works.
*/
setup_mm_for_reboot(reboot_mode);
/*
* copy branch instruction to reset location and call it
*/
*(unsigned long *)0 = *(unsigned long *)0x03800000;
((void(*)(void))0)();
/*
* Whoops - the architecture was unable to reboot.
* Tell the user! Should never happen...
*/
mdelay(1000);
printk("Reboot failed -- System halted\n");
while (1);
}
void show_regs(struct pt_regs * regs)
{
unsigned long flags;
flags = condition_codes(regs);
printk("pc : [<%08lx>] lr : [<%08lx>] %s\n"
"sp : %08lx ip : %08lx fp : %08lx\n",
instruction_pointer(regs),
regs->ARM_lr, print_tainted(), regs->ARM_sp,
regs->ARM_ip, regs->ARM_fp);
printk("r10: %08lx r9 : %08lx r8 : %08lx\n",
regs->ARM_r10, regs->ARM_r9,
regs->ARM_r8);
printk("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
regs->ARM_r7, regs->ARM_r6,
regs->ARM_r5, regs->ARM_r4);
printk("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
regs->ARM_r3, regs->ARM_r2,
regs->ARM_r1, regs->ARM_r0);
printk("Flags: %c%c%c%c",
flags & PSR_N_BIT ? 'N' : 'n',
flags & PSR_Z_BIT ? 'Z' : 'z',
flags & PSR_C_BIT ? 'C' : 'c',
flags & PSR_V_BIT ? 'V' : 'v');
printk(" IRQs o%s FIQs o%s Mode %s Segment %s\n",
interrupts_enabled(regs) ? "n" : "ff",
fast_interrupts_enabled(regs) ? "n" : "ff",
processor_modes[processor_mode(regs)],
get_fs() == get_ds() ? "kernel" : "user");
}
void show_fpregs(struct user_fp *regs)
{
int i;
for (i = 0; i < 8; i++) {
unsigned long *p;
char type;
p = (unsigned long *)(regs->fpregs + i);
switch (regs->ftype[i]) {
case 1: type = 'f'; break;
case 2: type = 'd'; break;
case 3: type = 'e'; break;
default: type = '?'; break;
}
if (regs->init_flag)
type = '?';
printk(" f%d(%c): %08lx %08lx %08lx%c",
i, type, p[0], p[1], p[2], i & 1 ? '\n' : ' ');
}
printk("FPSR: %08lx FPCR: %08lx\n",
(unsigned long)regs->fpsr,
(unsigned long)regs->fpcr);
}
/*
* Task structure and kernel stack allocation.
*/
static unsigned long *thread_info_head;
static unsigned int nr_thread_info;
extern unsigned long get_page_8k(int priority);
extern void free_page_8k(unsigned long page);
// FIXME - is this valid?
#define EXTRA_TASK_STRUCT 0
#define ll_alloc_task_struct() ((struct thread_info *)get_page_8k(GFP_KERNEL))
#define ll_free_task_struct(p) free_page_8k((unsigned long)(p))
//FIXME - do we use *task param below looks like we dont, which is ok?
//FIXME - if EXTRA_TASK_STRUCT is zero we can optimise the below away permanently. *IF* its supposed to be zero.
struct thread_info *alloc_thread_info(struct task_struct *task)
{
struct thread_info *thread = NULL;
if (EXTRA_TASK_STRUCT) {
unsigned long *p = thread_info_head;
if (p) {
thread_info_head = (unsigned long *)p[0];
nr_thread_info -= 1;
}
thread = (struct thread_info *)p;
}
if (!thread)
thread = ll_alloc_task_struct();
#ifdef CONFIG_MAGIC_SYSRQ
/*
* The stack must be cleared if you want SYSRQ-T to
* give sensible stack usage information
*/
if (thread) {
char *p = (char *)thread;
memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
}
#endif
return thread;
}
void free_thread_info(struct thread_info *thread)
{
if (EXTRA_TASK_STRUCT && nr_thread_info < EXTRA_TASK_STRUCT) {
unsigned long *p = (unsigned long *)thread;
p[0] = (unsigned long)thread_info_head;
thread_info_head = p;
nr_thread_info += 1;
} else
ll_free_task_struct(thread);
}
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
}
void flush_thread(void)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
memset(&thread->fpstate, 0, sizeof(union fp_state));
clear_used_math();
}
void release_thread(struct task_struct *dead_task)
{
}
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int
copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
unsigned long unused, struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *thread = task_thread_info(p);
struct pt_regs *childregs = task_pt_regs(p);
*childregs = *regs;
childregs->ARM_r0 = 0;
childregs->ARM_sp = stack_start;
memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
thread->cpu_context.sp = (unsigned long)childregs;
thread->cpu_context.pc = (unsigned long)ret_from_fork | MODE_SVC26 | PSR_I_BIT;
return 0;
}
/*
* fill in the fpe structure for a core dump...
*/
int dump_fpu (struct pt_regs *regs, struct user_fp *fp)
{
struct thread_info *thread = current_thread_info();
int used_math = !!used_math();
if (used_math)
memcpy(fp, &thread->fpstate.soft, sizeof (*fp));
return used_math;
}
/*
* fill in the user structure for a core dump..
*/
void dump_thread(struct pt_regs * regs, struct user * dump)
{
struct task_struct *tsk = current;
dump->magic = CMAGIC;
dump->start_code = tsk->mm->start_code;
dump->start_stack = regs->ARM_sp & ~(PAGE_SIZE - 1);
dump->u_tsize = (tsk->mm->end_code - tsk->mm->start_code) >> PAGE_SHIFT;
dump->u_dsize = (tsk->mm->brk - tsk->mm->start_data + PAGE_SIZE - 1) >> PAGE_SHIFT;
dump->u_ssize = 0;
dump->u_debugreg[0] = tsk->thread.debug.bp[0].address;
dump->u_debugreg[1] = tsk->thread.debug.bp[1].address;
dump->u_debugreg[2] = tsk->thread.debug.bp[0].insn;
dump->u_debugreg[3] = tsk->thread.debug.bp[1].insn;
dump->u_debugreg[4] = tsk->thread.debug.nsaved;
if (dump->start_stack < 0x04000000)
dump->u_ssize = (0x04000000 - dump->start_stack) >> PAGE_SHIFT;
dump->regs = *regs;
dump->u_fpvalid = dump_fpu (regs, &dump->u_fp);
}
/*
* Shuffle the argument into the correct register before calling the
* thread function. r1 is the thread argument, r2 is the pointer to
* the thread function, and r3 points to the exit function.
* FIXME - make sure this is right - the older code used to zero fp
* and cause the parent to call sys_exit (do_exit in this version)
*/
extern void kernel_thread_helper(void);
asm( ".section .text\n"
" .align\n"
" .type kernel_thread_helper, #function\n"
"kernel_thread_helper:\n"
" mov r0, r1\n"
" mov lr, r3\n"
" mov pc, r2\n"
" .size kernel_thread_helper, . - kernel_thread_helper\n"
" .previous");
/*
* Create a kernel thread.
*/
pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;
memset(&regs, 0, sizeof(regs));
regs.ARM_r1 = (unsigned long)arg;
regs.ARM_r2 = (unsigned long)fn;
regs.ARM_r3 = (unsigned long)do_exit;
regs.ARM_pc = (unsigned long)kernel_thread_helper | MODE_SVC26;
return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, lr;
unsigned long stack_page;
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;
stack_page = 4096 + (unsigned long)p;
fp = thread_saved_fp(p);
do {
if (fp < stack_page || fp > 4092+stack_page)
return 0;
lr = pc_pointer (((unsigned long *)fp)[-1]);
if (!in_sched_functions(lr))
return lr;
fp = *(unsigned long *) (fp - 12);
} while (count ++ < 16);
return 0;
}

670
arch/arm26/kernel/ptrace.c
View File

@ -1,670 +0,0 @@
/*
* linux/arch/arm26/kernel/ptrace.c
*
* By Ross Biro 1/23/92
* edited by Linus Torvalds
* ARM modifications Copyright (C) 2000 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/security.h>
#include <linux/signal.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
//#include <asm/processor.h>
#include "ptrace.h"
#define REG_PC 15
#define REG_PSR 15
/*
* does not yet catch signals sent when the child dies.
* in exit.c or in signal.c.
*/
/*
* Breakpoint SWI instruction: SWI &9F0001
*/
#define BREAKINST_ARM 0xef9f0001
/*
* this routine will get a word off of the processes privileged stack.
* the offset is how far from the base addr as stored in the THREAD.
* this routine assumes that all the privileged stacks are in our
* data space.
*/
static inline long get_user_reg(struct task_struct *task, int offset)
{
return task_pt_regs(task)->uregs[offset];
}
/*
* this routine will put a word on the processes privileged stack.
* the offset is how far from the base addr as stored in the THREAD.
* this routine assumes that all the privileged stacks are in our
* data space.
*/
static inline int
put_user_reg(struct task_struct *task, int offset, long data)
{
struct pt_regs newregs, *regs = task_pt_regs(task);
int ret = -EINVAL;
newregs = *regs;
newregs.uregs[offset] = data;
if (valid_user_regs(&newregs)) {
regs->uregs[offset] = data;
ret = 0;
}
return ret;
}
static inline int
read_u32(struct task_struct *task, unsigned long addr, u32 *res)
{
int ret;
ret = access_process_vm(task, addr, res, sizeof(*res), 0);
return ret == sizeof(*res) ? 0 : -EIO;
}
static inline int
read_instr(struct task_struct *task, unsigned long addr, u32 *res)
{
int ret;
u32 val;
ret = access_process_vm(task, addr & ~3, &val, sizeof(val), 0);
ret = ret == sizeof(val) ? 0 : -EIO;
*res = val;
return ret;
}
/*
* Get value of register `rn' (in the instruction)
*/
static unsigned long
ptrace_getrn(struct task_struct *child, unsigned long insn)
{
unsigned int reg = (insn >> 16) & 15;
unsigned long val;
val = get_user_reg(child, reg);
if (reg == 15)
val = pc_pointer(val + 8); //FIXME - correct for arm26?
return val;
}
/*
* Get value of operand 2 (in an ALU instruction)
*/
static unsigned long
ptrace_getaluop2(struct task_struct *child, unsigned long insn)
{
unsigned long val;
int shift;
int type;
if (insn & 1 << 25) {
val = insn & 255;
shift = (insn >> 8) & 15;
type = 3;
} else {
val = get_user_reg (child, insn & 15);
if (insn & (1 << 4))
shift = (int)get_user_reg (child, (insn >> 8) & 15);
else
shift = (insn >> 7) & 31;
type = (insn >> 5) & 3;
}
switch (type) {
case 0: val <<= shift; break;
case 1: val >>= shift; break;
case 2:
val = (((signed long)val) >> shift);
break;
case 3:
val = (val >> shift) | (val << (32 - shift));
break;
}
return val;
}
/*
* Get value of operand 2 (in a LDR instruction)
*/
static unsigned long
ptrace_getldrop2(struct task_struct *child, unsigned long insn)
{
unsigned long val;
int shift;
int type;
val = get_user_reg(child, insn & 15);
shift = (insn >> 7) & 31;
type = (insn >> 5) & 3;
switch (type) {
case 0: val <<= shift; break;
case 1: val >>= shift; break;
case 2:
val = (((signed long)val) >> shift);
break;
case 3:
val = (val >> shift) | (val << (32 - shift));
break;
}
return val;
}
#define OP_MASK 0x01e00000
#define OP_AND 0x00000000
#define OP_EOR 0x00200000
#define OP_SUB 0x00400000
#define OP_RSB 0x00600000
#define OP_ADD 0x00800000
#define OP_ADC 0x00a00000
#define OP_SBC 0x00c00000
#define OP_RSC 0x00e00000
#define OP_ORR 0x01800000
#define OP_MOV 0x01a00000
#define OP_BIC 0x01c00000
#define OP_MVN 0x01e00000
static unsigned long
get_branch_address(struct task_struct *child, unsigned long pc, unsigned long insn)
{
u32 alt = 0;
switch (insn & 0x0e000000) {
case 0x00000000:
case 0x02000000: {
/*
* data processing
*/
long aluop1, aluop2, ccbit;
if ((insn & 0xf000) != 0xf000)
break;
aluop1 = ptrace_getrn(child, insn);
aluop2 = ptrace_getaluop2(child, insn);
ccbit = get_user_reg(child, REG_PSR) & PSR_C_BIT ? 1 : 0;
switch (insn & OP_MASK) {
case OP_AND: alt = aluop1 & aluop2; break;
case OP_EOR: alt = aluop1 ^ aluop2; break;
case OP_SUB: alt = aluop1 - aluop2; break;
case OP_RSB: alt = aluop2 - aluop1; break;
case OP_ADD: alt = aluop1 + aluop2; break;
case OP_ADC: alt = aluop1 + aluop2 + ccbit; break;
case OP_SBC: alt = aluop1 - aluop2 + ccbit; break;
case OP_RSC: alt = aluop2 - aluop1 + ccbit; break;
case OP_ORR: alt = aluop1 | aluop2; break;
case OP_MOV: alt = aluop2; break;
case OP_BIC: alt = aluop1 & ~aluop2; break;
case OP_MVN: alt = ~aluop2; break;
}
break;
}
case 0x04000000:
case 0x06000000:
/*
* ldr
*/
if ((insn & 0x0010f000) == 0x0010f000) {
unsigned long base;
base = ptrace_getrn(child, insn);
if (insn & 1 << 24) {
long aluop2;
if (insn & 0x02000000)
aluop2 = ptrace_getldrop2(child, insn);
else
aluop2 = insn & 0xfff;
if (insn & 1 << 23)
base += aluop2;
else
base -= aluop2;
}
if (read_u32(child, base, &alt) == 0)
alt = pc_pointer(alt);
}
break;
case 0x08000000:
/*
* ldm
*/
if ((insn & 0x00108000) == 0x00108000) {
unsigned long base;
unsigned int nr_regs;
if (insn & (1 << 23)) {
nr_regs = hweight16(insn & 65535) << 2;
if (!(insn & (1 << 24)))
nr_regs -= 4;
} else {
if (insn & (1 << 24))
nr_regs = -4;
else
nr_regs = 0;
}
base = ptrace_getrn(child, insn);
if (read_u32(child, base + nr_regs, &alt) == 0)
alt = pc_pointer(alt);
break;
}
break;
case 0x0a000000: {
/*
* bl or b
*/
signed long displ;
/* It's a branch/branch link: instead of trying to
* figure out whether the branch will be taken or not,
* we'll put a breakpoint at both locations. This is
* simpler, more reliable, and probably not a whole lot
* slower than the alternative approach of emulating the
* branch.
*/
displ = (insn & 0x00ffffff) << 8;
displ = (displ >> 6) + 8;
if (displ != 0 && displ != 4)
alt = pc + displ;
}
break;
}
return alt;
}
static int
swap_insn(struct task_struct *task, unsigned long addr,
void *old_insn, void *new_insn, int size)
{
int ret;
ret = access_process_vm(task, addr, old_insn, size, 0);
if (ret == size)
ret = access_process_vm(task, addr, new_insn, size, 1);
return ret;
}
static void
add_breakpoint(struct task_struct *task, struct debug_info *dbg, unsigned long addr)
{
int nr = dbg->nsaved;
if (nr < 2) {
u32 new_insn = BREAKINST_ARM;
int res;
res = swap_insn(task, addr, &dbg->bp[nr].insn, &new_insn, 4);
if (res == 4) {
dbg->bp[nr].address = addr;
dbg->nsaved += 1;
}
} else
printk(KERN_ERR "ptrace: too many breakpoints\n");
}
/*
* Clear one breakpoint in the user program. We copy what the hardware
* does and use bit 0 of the address to indicate whether this is a Thumb
* breakpoint or an ARM breakpoint.
*/
static void clear_breakpoint(struct task_struct *task, struct debug_entry *bp)
{
unsigned long addr = bp->address;
u32 old_insn;
int ret;
ret = swap_insn(task, addr & ~3, &old_insn,
&bp->insn, 4);
if (ret != 4 || old_insn != BREAKINST_ARM)
printk(KERN_ERR "%s:%d: corrupted ARM breakpoint at "
"0x%08lx (0x%08x)\n", task->comm, task->pid,
addr, old_insn);
}
void ptrace_set_bpt(struct task_struct *child)
{
struct pt_regs *regs;
unsigned long pc;
u32 insn;
int res;
regs = task_pt_regs(child);
pc = instruction_pointer(regs);
res = read_instr(child, pc, &insn);
if (!res) {
struct debug_info *dbg = &child->thread.debug;
unsigned long alt;
dbg->nsaved = 0;
alt = get_branch_address(child, pc, insn);
if (alt)
add_breakpoint(child, dbg, alt);
/*
* Note that we ignore the result of setting the above
* breakpoint since it may fail. When it does, this is
* not so much an error, but a forewarning that we may
* be receiving a prefetch abort shortly.
*
* If we don't set this breakpoint here, then we can
* lose control of the thread during single stepping.
*/
if (!alt || predicate(insn) != PREDICATE_ALWAYS)
add_breakpoint(child, dbg, pc + 4);
}
}
/*
* Ensure no single-step breakpoint is pending. Returns non-zero
* value if child was being single-stepped.
*/
void ptrace_cancel_bpt(struct task_struct *child)
{
int i, nsaved = child->thread.debug.nsaved;
child->thread.debug.nsaved = 0;
if (nsaved > 2) {
printk("ptrace_cancel_bpt: bogus nsaved: %d!\n", nsaved);
nsaved = 2;
}
for (i = 0; i < nsaved; i++)
clear_breakpoint(child, &child->thread.debug.bp[i]);
}
/*
* Called by kernel/ptrace.c when detaching..
*
* Make sure the single step bit is not set.
*/
void ptrace_disable(struct task_struct *child)
{
child->ptrace &= ~PT_SINGLESTEP;
ptrace_cancel_bpt(child);
}
/*
* Handle hitting a breakpoint.
*/
void ptrace_break(struct task_struct *tsk, struct pt_regs *regs)
{
siginfo_t info;
/*
* The PC is always left pointing at the next instruction. Fix this.
*/
regs->ARM_pc -= 4;
if (tsk->thread.debug.nsaved == 0)
printk(KERN_ERR "ptrace: bogus breakpoint trap\n");
ptrace_cancel_bpt(tsk);
info.si_signo = SIGTRAP;
info.si_errno = 0;
info.si_code = TRAP_BRKPT;
info.si_addr = (void *)instruction_pointer(regs) - 4;
force_sig_info(SIGTRAP, &info, tsk);
}
/*
* Read the word at offset "off" into the "struct user". We
* actually access the pt_regs stored on the kernel stack.
*/
static int ptrace_read_user(struct task_struct *tsk, unsigned long off,
unsigned long *ret)
{
unsigned long tmp;
if (off & 3 || off >= sizeof(struct user))
return -EIO;
tmp = 0;
if (off < sizeof(struct pt_regs))
tmp = get_user_reg(tsk, off >> 2);
return put_user(tmp, ret);
}
/*
* Write the word at offset "off" into "struct user". We
* actually access the pt_regs stored on the kernel stack.
*/
static int ptrace_write_user(struct task_struct *tsk, unsigned long off,
unsigned long val)
{
if (off & 3 || off >= sizeof(struct user))
return -EIO;
if (off >= sizeof(struct pt_regs))
return 0;
return put_user_reg(tsk, off >> 2, val);
}
/*
* Get all user integer registers.
*/
static int ptrace_getregs(struct task_struct *tsk, void *uregs)
{
struct pt_regs *regs = task_pt_regs(tsk);
return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
}
/*
* Set all user integer registers.
*/
static int ptrace_setregs(struct task_struct *tsk, void *uregs)
{
struct pt_regs newregs;
int ret;
ret = -EFAULT;
if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
struct pt_regs *regs = task_pt_regs(tsk);
ret = -EINVAL;
if (valid_user_regs(&newregs)) {
*regs = newregs;
ret = 0;
}
}
return ret;
}
/*
* Get the child FPU state.
*/
static int ptrace_getfpregs(struct task_struct *tsk, void *ufp)
{
return copy_to_user(ufp, &task_thread_info(tsk)->fpstate,
sizeof(struct user_fp)) ? -EFAULT : 0;
}
/*
* Set the child FPU state.
*/
static int ptrace_setfpregs(struct task_struct *tsk, void *ufp)
{
set_stopped_child_used_math(tsk);
return copy_from_user(&task_thread_info(tsk)->fpstate, ufp,
sizeof(struct user_fp)) ? -EFAULT : 0;
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
int ret;
switch (request) {
/*
* read word at location "addr" in the child process.
*/
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
ret = generic_ptrace_peekdata(child, addr, data);
break;
case PTRACE_PEEKUSR:
ret = ptrace_read_user(child, addr, (unsigned long *)data);
break;
/*
* write the word at location addr.
*/
case PTRACE_POKETEXT:
case PTRACE_POKEDATA:
ret = generic_ptrace_pokedata(child, addr, data);
break;
case PTRACE_POKEUSR:
ret = ptrace_write_user(child, addr, data);
break;
/*
* continue/restart and stop at next (return from) syscall
*/
case PTRACE_SYSCALL:
case PTRACE_CONT:
ret = -EIO;
if (!valid_signal(data))
break;
if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
else
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
/* make sure single-step breakpoint is gone. */
child->ptrace &= ~PT_SINGLESTEP;
ptrace_cancel_bpt(child);
wake_up_process(child);
ret = 0;
break;
/*
* make the child exit. Best I can do is send it a sigkill.
* perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL:
/* make sure single-step breakpoint is gone. */
child->ptrace &= ~PT_SINGLESTEP;
ptrace_cancel_bpt(child);
if (child->exit_state != EXIT_ZOMBIE) {
child->exit_code = SIGKILL;
wake_up_process(child);
}
ret = 0;
break;
/*
* execute single instruction.
*/
case PTRACE_SINGLESTEP:
ret = -EIO;
if (!valid_signal(data))
break;
child->ptrace |= PT_SINGLESTEP;
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);
ret = 0;
break;
case PTRACE_DETACH:
ret = ptrace_detach(child, data);
break;
case PTRACE_GETREGS:
ret = ptrace_getregs(child, (void *)data);
break;
case PTRACE_SETREGS:
ret = ptrace_setregs(child, (void *)data);
break;
case PTRACE_GETFPREGS:
ret = ptrace_getfpregs(child, (void *)data);
break;
case PTRACE_SETFPREGS:
ret = ptrace_setfpregs(child, (void *)data);
break;
default:
ret = ptrace_request(child, request, addr, data);
break;
}
return ret;
}
asmlinkage void syscall_trace(int why, struct pt_regs *regs)
{
unsigned long ip;
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
/*
* Save IP. IP is used to denote syscall entry/exit:
* IP = 0 -> entry, = 1 -> exit
*/
ip = regs->ARM_ip;
regs->ARM_ip = why;
/* the 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
* this isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
regs->ARM_ip = ip;
}

13
arch/arm26/kernel/ptrace.h
View File

@ -1,13 +0,0 @@
/*
* linux/arch/arm26/kernel/ptrace.h
*
* Copyright (C) 2000-2003 Russell King
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
extern void ptrace_cancel_bpt(struct task_struct *);
extern void ptrace_set_bpt(struct task_struct *);
extern void ptrace_break(struct task_struct *, struct pt_regs *);

222
arch/arm26/kernel/semaphore.c
View File

@ -1,222 +0,0 @@
/*
* ARM semaphore implementation, taken from
*
* i386 semaphore implementation.
*
* (C) Copyright 1999 Linus Torvalds
* (C) Copyright 2003 Ian Molton (ARM26 mods)
*
* Modified for ARM by Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <asm/semaphore.h>
/*
* Semaphores are implemented using a two-way counter:
* The "count" variable is decremented for each process
* that tries to acquire the semaphore, while the "sleeping"
* variable is a count of such acquires.
*
* Notably, the inline "up()" and "down()" functions can
* efficiently test if they need to do any extra work (up
* needs to do something only if count was negative before
* the increment operation.
*
* "sleeping" and the contention routine ordering is
* protected by the semaphore spinlock.
*
* Note that these functions are only called when there is
* contention on the lock, and as such all this is the
* "non-critical" part of the whole semaphore business. The
* critical part is the inline stuff in <asm/semaphore.h>
* where we want to avoid any extra jumps and calls.
*/
/*
* Logic:
* - only on a boundary condition do we need to care. When we go
* from a negative count to a non-negative, we wake people up.
* - when we go from a non-negative count to a negative do we
* (a) synchronize with the "sleeper" count and (b) make sure
* that we're on the wakeup list before we synchronize so that
* we cannot lose wakeup events.
*/
void __up(struct semaphore *sem)
{
wake_up(&sem->wait);
}
static DEFINE_SPINLOCK(semaphore_lock);
void __sched __down(struct semaphore * sem)
{
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
tsk->state = TASK_UNINTERRUPTIBLE;
add_wait_queue_exclusive(&sem->wait, &wait);
spin_lock_irq(&semaphore_lock);
sem->sleepers++;
for (;;) {
int sleepers = sem->sleepers;
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irq(&semaphore_lock);
schedule();
tsk->state = TASK_UNINTERRUPTIBLE;
spin_lock_irq(&semaphore_lock);
}
spin_unlock_irq(&semaphore_lock);
remove_wait_queue(&sem->wait, &wait);
tsk->state = TASK_RUNNING;
wake_up(&sem->wait);
}
int __sched __down_interruptible(struct semaphore * sem)
{
int retval = 0;
struct task_struct *tsk = current;
DECLARE_WAITQUEUE(wait, tsk);
tsk->state = TASK_INTERRUPTIBLE;
add_wait_queue_exclusive(&sem->wait, &wait);
spin_lock_irq(&semaphore_lock);
sem->sleepers ++;
for (;;) {
int sleepers = sem->sleepers;
/*
* With signals pending, this turns into
* the trylock failure case - we won't be
* sleeping, and we* can't get the lock as
* it has contention. Just correct the count
* and exit.
*/
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
break;
}
/*
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock. The
* "-1" is because we're still hoping to get
* the lock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
sem->sleepers = 1; /* us - see -1 above */
spin_unlock_irq(&semaphore_lock);
schedule();
tsk->state = TASK_INTERRUPTIBLE;
spin_lock_irq(&semaphore_lock);
}
spin_unlock_irq(&semaphore_lock);
tsk->state = TASK_RUNNING;
remove_wait_queue(&sem->wait, &wait);
wake_up(&sem->wait);
return retval;
}
/*
* Trylock failed - make sure we correct for
* having decremented the count.
*
* We could have done the trylock with a
* single "cmpxchg" without failure cases,
* but then it wouldn't work on a 386.
*/
int __down_trylock(struct semaphore * sem)
{
int sleepers;
unsigned long flags;
spin_lock_irqsave(&semaphore_lock, flags);
sleepers = sem->sleepers + 1;
sem->sleepers = 0;
/*
* Add "everybody else" and us into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers, &sem->count))
wake_up(&sem->wait);
spin_unlock_irqrestore(&semaphore_lock, flags);
return 1;
}
/*
* The semaphore operations have a special calling sequence that
* allow us to do a simpler in-line version of them. These routines
* need to convert that sequence back into the C sequence when
* there is contention on the semaphore.
*
* ip contains the semaphore pointer on entry. Save the C-clobbered
* registers (r0 to r3 and lr), but not ip, as we use it as a return
* value in some cases..
*/
asm(" .section .sched.text , #alloc, #execinstr \n\
.align 5 \n\
.globl __down_failed \n\
__down_failed: \n\
stmfd sp!, {r0 - r3, lr} \n\
mov r0, ip \n\
bl __down \n\
ldmfd sp!, {r0 - r3, pc}^ \n\
\n\
.align 5 \n\
.globl __down_interruptible_failed \n\
__down_interruptible_failed: \n\
stmfd sp!, {r0 - r3, lr} \n\
mov r0, ip \n\
bl __down_interruptible \n\
mov ip, r0 \n\
ldmfd sp!, {r0 - r3, pc}^ \n\
\n\
.align 5 \n\
.globl __down_trylock_failed \n\
__down_trylock_failed: \n\
stmfd sp!, {r0 - r3, lr} \n\
mov r0, ip \n\
bl __down_trylock \n\
mov ip, r0 \n\
ldmfd sp!, {r0 - r3, pc}^ \n\
\n\
.align 5 \n\
.globl __up_wakeup \n\
__up_wakeup: \n\
stmfd sp!, {r0 - r3, lr} \n\
mov r0, ip \n\
bl __up \n\
ldmfd sp!, {r0 - r3, pc}^ \n\
");
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_interruptible_failed);
EXPORT_SYMBOL(__down_trylock_failed);
EXPORT_SYMBOL(__up_wakeup);

572
arch/arm26/kernel/setup.c
View File

@ -1,572 +0,0 @@
/*
* linux/arch/arm26/kernel/setup.c
*
* Copyright (C) 1995-2001 Russell King
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/utsname.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/screen_info.h>
#include <linux/init.h>
#include <linux/root_dev.h>
#include <asm/elf.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/procinfo.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/tlbflush.h>
#include <asm/irqchip.h>
#ifndef MEM_SIZE
#define MEM_SIZE (16*1024*1024)
#endif
#ifdef CONFIG_PREEMPT
DEFINE_SPINLOCK(kernel_flag);
#endif
#if defined(CONFIG_FPE_NWFPE)
char fpe_type[8];
static int __init fpe_setup(char *line)
{
memcpy(fpe_type, line, 8);
return 1;
}
__setup("fpe=", fpe_setup);
#endif
extern void paging_init(struct meminfo *);
extern void convert_to_tag_list(struct tag *tags);
extern void squash_mem_tags(struct tag *tag);
extern void bootmem_init(struct meminfo *);
extern int root_mountflags;
extern int _stext, _text, _etext, _edata, _end;
#ifdef CONFIG_XIP_KERNEL
extern int _endtext, _sdata;
#endif
unsigned int processor_id;
unsigned int __machine_arch_type;
unsigned int system_rev;
unsigned int system_serial_low;
unsigned int system_serial_high;
unsigned int elf_hwcap;
unsigned int memc_ctrl_reg;
unsigned int number_mfm_drives;
struct processor processor;
char elf_platform[ELF_PLATFORM_SIZE];
unsigned long phys_initrd_start __initdata = 0;
unsigned long phys_initrd_size __initdata = 0;
static struct meminfo meminfo __initdata = { 0, };
static struct proc_info_item proc_info;
static const char *machine_name;
static char __initdata command_line[COMMAND_LINE_SIZE];
static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
/*
* Standard memory resources
*/
static struct resource mem_res[] = {
{ "Video RAM", 0, 0, IORESOURCE_MEM },
{ "Kernel code", 0, 0, IORESOURCE_MEM },
{ "Kernel data", 0, 0, IORESOURCE_MEM }
};
#define video_ram mem_res[0]
#define kernel_code mem_res[1]
#define kernel_data mem_res[2]
static struct resource io_res[] = {
{ "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY },
{ "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY },
{ "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY }
};
#define lp0 io_res[0]
#define lp1 io_res[1]
#define lp2 io_res[2]
#define dump_cpu_info() do { } while (0)
static void __init setup_processor(void)
{
extern struct proc_info_list __proc_info_begin, __proc_info_end;
struct proc_info_list *list;
/*
* locate processor in the list of supported processor
* types. The linker builds this table for us from the
* entries in arch/arm26/mm/proc-*.S
*/
for (list = &__proc_info_begin; list < &__proc_info_end ; list++)
if ((processor_id & list->cpu_mask) == list->cpu_val)
break;
/*
* If processor type is unrecognised, then we
* can do nothing...
*/
if (list >= &__proc_info_end) {
printk("CPU configuration botched (ID %08x), unable "
"to continue.\n", processor_id);
while (1);
}
proc_info = *list->info;
processor = *list->proc;
printk("CPU: %s %s revision %d\n",
proc_info.manufacturer, proc_info.cpu_name,
(int)processor_id & 15);
dump_cpu_info();
sprintf(init_utsname()->machine, "%s", list->arch_name);
sprintf(elf_platform, "%s", list->elf_name);
elf_hwcap = list->elf_hwcap;
cpu_proc_init();
}
/*
* Initial parsing of the command line. We need to pick out the
* memory size. We look for mem=size@start, where start and size
* are "size[KkMm]"
*/
static void __init
parse_cmdline(struct meminfo *mi, char **cmdline_p, char *from)
{
char c = ' ', *to = command_line;
int usermem = 0, len = 0;
for (;;) {
if (c == ' ' && !memcmp(from, "mem=", 4)) {
unsigned long size, start;
if (to != command_line)
to -= 1;
/*
* If the user specifies memory size, we
* blow away any automatically generated
* size.
*/
if (usermem == 0) {
usermem = 1;
mi->nr_banks = 0;
}
start = PHYS_OFFSET;
size = memparse(from + 4, &from);
if (*from == '@')
start = memparse(from + 1, &from);
mi->bank[mi->nr_banks].start = start;
mi->bank[mi->nr_banks].size = size;
mi->bank[mi->nr_banks].node = PHYS_TO_NID(start);
mi->nr_banks += 1;
}
c = *from++;
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*to++ = c;
}
*to = '\0';
*cmdline_p = command_line;
}
static void __init
setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
{
#ifdef CONFIG_BLK_DEV_RAM
extern int rd_size, rd_image_start, rd_prompt, rd_doload;
rd_image_start = image_start;
rd_prompt = prompt;
rd_doload = doload;
if (rd_sz)
rd_size = rd_sz;
#endif
}
static void __init
request_standard_resources(struct meminfo *mi)
{
struct resource *res;
int i;
kernel_code.start = init_mm.start_code;
kernel_code.end = init_mm.end_code - 1;
#ifdef CONFIG_XIP_KERNEL
kernel_data.start = init_mm.start_data;
#else
kernel_data.start = init_mm.end_code;
#endif
kernel_data.end = init_mm.brk - 1;
for (i = 0; i < mi->nr_banks; i++) {
unsigned long virt_start, virt_end;
if (mi->bank[i].size == 0)
continue;
virt_start = mi->bank[i].start;
virt_end = virt_start + mi->bank[i].size - 1;
res = alloc_bootmem_low(sizeof(*res));
res->name = "System RAM";
res->start = virt_start;
res->end = virt_end;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
request_resource(&iomem_resource, res);
if (kernel_code.start >= res->start &&
kernel_code.end <= res->end)
request_resource(res, &kernel_code);
if (kernel_data.start >= res->start &&
kernel_data.end <= res->end)
request_resource(res, &kernel_data);
}
/* FIXME - needed? if (mdesc->video_start) {
video_ram.start = mdesc->video_start;
video_ram.end = mdesc->video_end;
request_resource(&iomem_resource, &video_ram);
}*/
/*
* Some machines don't have the possibility of ever
* possessing lp1 or lp2
*/
if (0) /* FIXME - need to do this for A5k at least */
request_resource(&ioport_resource, &lp0);
}
/*
* Tag parsing.
*
* This is the new way of passing data to the kernel at boot time. Rather
* than passing a fixed inflexible structure to the kernel, we pass a list
* of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
* tag for the list to be recognised (to distinguish the tagged list from
* a param_struct). The list is terminated with a zero-length tag (this tag
* is not parsed in any way).
*/
static int __init parse_tag_core(const struct tag *tag)
{
if (tag->hdr.size > 2) {
if ((tag->u.core.flags & 1) == 0)
root_mountflags &= ~MS_RDONLY;
ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
}
return 0;
}
__tagtable(ATAG_CORE, parse_tag_core);
static int __init parse_tag_mem32(const struct tag *tag)
{
if (meminfo.nr_banks >= NR_BANKS) {
printk(KERN_WARNING
"Ignoring memory bank 0x%08x size %dKB\n",
tag->u.mem.start, tag->u.mem.size / 1024);
return -EINVAL;
}
meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
meminfo.bank[meminfo.nr_banks].size = tag->u.mem.size;
meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(tag->u.mem.start);
meminfo.nr_banks += 1;
return 0;
}
__tagtable(ATAG_MEM, parse_tag_mem32);
#if defined(CONFIG_DUMMY_CONSOLE)
struct screen_info screen_info = {
.orig_video_lines = 30,
.orig_video_cols = 80,
.orig_video_mode = 0,
.orig_video_ega_bx = 0,
.orig_video_isVGA = 1,
.orig_video_points = 8
};
static int __init parse_tag_videotext(const struct tag *tag)
{
screen_info.orig_x = tag->u.videotext.x;
screen_info.orig_y = tag->u.videotext.y;
screen_info.orig_video_page = tag->u.videotext.video_page;
screen_info.orig_video_mode = tag->u.videotext.video_mode;
screen_info.orig_video_cols = tag->u.videotext.video_cols;
screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
screen_info.orig_video_lines = tag->u.videotext.video_lines;
screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
screen_info.orig_video_points = tag->u.videotext.video_points;
return 0;
}
__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
#endif
static int __init parse_tag_acorn(const struct tag *tag)
{
memc_ctrl_reg = tag->u.acorn.memc_control_reg;
number_mfm_drives = tag->u.acorn.adfsdrives;
return 0;
}
__tagtable(ATAG_ACORN, parse_tag_acorn);
static int __init parse_tag_ramdisk(const struct tag *tag)
{
setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
(tag->u.ramdisk.flags & 2) == 0,
tag->u.ramdisk.start, tag->u.ramdisk.size);
return 0;
}
__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
static int __init parse_tag_initrd(const struct tag *tag)
{
printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
phys_initrd_start = (unsigned long)tag->u.initrd.start;
phys_initrd_size = (unsigned long)tag->u.initrd.size;
return 0;
}
__tagtable(ATAG_INITRD, parse_tag_initrd);
static int __init parse_tag_initrd2(const struct tag *tag)
{
printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
phys_initrd_start = (unsigned long)tag->u.initrd.start;
phys_initrd_size = (unsigned long)tag->u.initrd.size;
return 0;
}
__tagtable(ATAG_INITRD2, parse_tag_initrd2);
static int __init parse_tag_serialnr(const struct tag *tag)
{
system_serial_low = tag->u.serialnr.low;
system_serial_high = tag->u.serialnr.high;
return 0;
}
__tagtable(ATAG_SERIAL, parse_tag_serialnr);
static int __init parse_tag_revision(const struct tag *tag)
{
system_rev = tag->u.revision.rev;
return 0;
}
__tagtable(ATAG_REVISION, parse_tag_revision);
static int __init parse_tag_cmdline(const struct tag *tag)
{
strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
default_command_line[COMMAND_LINE_SIZE - 1] = '\0';
return 0;
}
__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
/*
* Scan the tag table for this tag, and call its parse function.
* The tag table is built by the linker from all the __tagtable
* declarations.
*/
static int __init parse_tag(const struct tag *tag)
{
extern struct tagtable __tagtable_begin, __tagtable_end;
struct tagtable *t;
for (t = &__tagtable_begin; t < &__tagtable_end; t++)
if (tag->hdr.tag == t->tag) {
t->parse(tag);
break;
}
return t < &__tagtable_end;
}
/*
* Parse all tags in the list, checking both the global and architecture
* specific tag tables.
*/
static void __init parse_tags(const struct tag *t)
{
for (; t->hdr.size; t = tag_next(t))
if (!parse_tag(t))
printk(KERN_WARNING
"Ignoring unrecognised tag 0x%08x\n",
t->hdr.tag);
}
/*
* This holds our defaults.
*/
static struct init_tags {
struct tag_header hdr1;
struct tag_core core;
struct tag_header hdr2;
struct tag_mem32 mem;
struct tag_header hdr3;
} init_tags __initdata = {
{ tag_size(tag_core), ATAG_CORE },
{ 1, PAGE_SIZE, 0xff },
{ tag_size(tag_mem32), ATAG_MEM },
{ MEM_SIZE, PHYS_OFFSET },
{ 0, ATAG_NONE }
};
void __init setup_arch(char **cmdline_p)
{
struct tag *tags = (struct tag *)&init_tags;
char *from = default_command_line;
setup_processor();
if(machine_arch_type == MACH_TYPE_A5K)
machine_name = "A5000";
else if(machine_arch_type == MACH_TYPE_ARCHIMEDES)
machine_name = "Archimedes";
else
machine_name = "UNKNOWN";
//FIXME - the tag struct is always copied here but this is a block
// of RAM that is accidentally reserved along with video RAM. perhaps
// it would be a good idea to explicitly reserve this?
tags = (struct tag *)0x0207c000;
/*
* If we have the old style parameters, convert them to
* a tag list.
*/
if (tags->hdr.tag != ATAG_CORE)
convert_to_tag_list(tags);
if (tags->hdr.tag != ATAG_CORE)
tags = (struct tag *)&init_tags;
if (tags->hdr.tag == ATAG_CORE) {
if (meminfo.nr_banks != 0)
squash_mem_tags(tags);
parse_tags(tags);
}
init_mm.start_code = (unsigned long) &_text;
#ifndef CONFIG_XIP_KERNEL
init_mm.end_code = (unsigned long) &_etext;
#else
init_mm.end_code = (unsigned long) &_endtext;
init_mm.start_data = (unsigned long) &_sdata;
#endif
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
parse_cmdline(&meminfo, cmdline_p, from);
bootmem_init(&meminfo);
paging_init(&meminfo);
request_standard_resources(&meminfo);
#ifdef CONFIG_VT
#if defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
}
static const char *hwcap_str[] = {
"swp",
"half",
"thumb",
"26bit",
"fastmult",
"fpa",
"vfp",
"edsp",
NULL
};
static int c_show(struct seq_file *m, void *v)
{
int i;
seq_printf(m, "Processor\t: %s %s rev %d (%s)\n",
proc_info.manufacturer, proc_info.cpu_name,
(int)processor_id & 15, elf_platform);
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
loops_per_jiffy / (500000/HZ),
(loops_per_jiffy / (5000/HZ)) % 100);
/* dump out the processor features */
seq_puts(m, "Features\t: ");
for (i = 0; hwcap_str[i]; i++)
if (elf_hwcap & (1 << i))
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
seq_printf(m, "CPU revision\t: %d\n\n", processor_id & 15);
seq_printf(m, "Hardware\t: %s\n", machine_name);
seq_printf(m, "Revision\t: %04x\n", system_rev);
seq_printf(m, "Serial\t\t: %08x%08x\n",
system_serial_high, system_serial_low);
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
return *pos < 1 ? (void *)1 : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return NULL;
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = c_show
};

538
arch/arm26/kernel/signal.c
View File

@ -1,538 +0,0 @@
/*
* linux/arch/arm26/kernel/signal.c
*
* Copyright (C) 1995-2002 Russell King
* Copyright (C) 2003 Ian Molton (ARM26)
*
* FIXME!!! This is probably very broken (13/05/2003)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/elf.h>
#include <asm/pgalloc.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include "ptrace.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
/*
* For ARM syscalls, we encode the syscall number into the instruction.
*/
#define SWI_SYS_SIGRETURN (0xef000000|(__NR_sigreturn))
#define SWI_SYS_RT_SIGRETURN (0xef000000|(__NR_rt_sigreturn))
static int do_signal(sigset_t *oldset, struct pt_regs * regs, int syscall);
/*
* atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask, struct pt_regs *regs)
{
sigset_t saveset;
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->ARM_r0 = -EINTR;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs, 0))
return regs->ARM_r0;
}
}
asmlinkage int
sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, struct pt_regs *regs)
{
sigset_t saveset, newset;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->ARM_r0 = -EINTR;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs, 0))
return regs->ARM_r0;
}
}
asmlinkage int
sys_sigaction(int sig, const struct old_sigaction *act,
struct old_sigaction *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
return -EFAULT;
__get_user(new_ka.sa.sa_flags, &act->sa_flags);
__get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
return -EFAULT;
__put_user(old_ka.sa.sa_flags, &oact->sa_flags);
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
}
/*
* Do a signal return; undo the signal stack.
*/
struct sigframe
{
struct sigcontext sc;
unsigned long extramask[_NSIG_WORDS-1];
unsigned long retcode;
};
struct rt_sigframe
{
struct siginfo *pinfo;
void *puc;
struct siginfo info;
struct ucontext uc;
unsigned long retcode;
};
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
{
int err = 0;
__get_user_error(regs->ARM_r0, &sc->arm_r0, err);
__get_user_error(regs->ARM_r1, &sc->arm_r1, err);
__get_user_error(regs->ARM_r2, &sc->arm_r2, err);
__get_user_error(regs->ARM_r3, &sc->arm_r3, err);
__get_user_error(regs->ARM_r4, &sc->arm_r4, err);
__get_user_error(regs->ARM_r5, &sc->arm_r5, err);
__get_user_error(regs->ARM_r6, &sc->arm_r6, err);
__get_user_error(regs->ARM_r7, &sc->arm_r7, err);
__get_user_error(regs->ARM_r8, &sc->arm_r8, err);
__get_user_error(regs->ARM_r9, &sc->arm_r9, err);
__get_user_error(regs->ARM_r10, &sc->arm_r10, err);
__get_user_error(regs->ARM_fp, &sc->arm_fp, err);
__get_user_error(regs->ARM_ip, &sc->arm_ip, err);
__get_user_error(regs->ARM_sp, &sc->arm_sp, err);
__get_user_error(regs->ARM_lr, &sc->arm_lr, err);
__get_user_error(regs->ARM_pc, &sc->arm_pc, err);
err |= !valid_user_regs(regs);
return err;
}
asmlinkage int sys_sigreturn(struct pt_regs *regs)
{
struct sigframe *frame;
sigset_t set;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
if (regs->ARM_sp & 7)
goto badframe;
frame = (struct sigframe *)regs->ARM_sp;
if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
goto badframe;
if (__get_user(set.sig[0], &frame->sc.oldmask)
|| (_NSIG_WORDS > 1
&& __copy_from_user(&set.sig[1], &frame->extramask,
sizeof(frame->extramask))))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
if (restore_sigcontext(regs, &frame->sc))
goto badframe;
/* Send SIGTRAP if we're single-stepping */
if (current->ptrace & PT_SINGLESTEP) {
ptrace_cancel_bpt(current);
send_sig(SIGTRAP, current, 1);
}
return regs->ARM_r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
{
struct rt_sigframe *frame;
sigset_t set;
/*
* Since we stacked the signal on a 64-bit boundary,
* then 'sp' should be word aligned here. If it's
* not, then the user is trying to mess with us.
*/
if (regs->ARM_sp & 7)
goto badframe;
frame = (struct rt_sigframe *)regs->ARM_sp;
if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
/* Send SIGTRAP if we're single-stepping */
if (current->ptrace & PT_SINGLESTEP) {
ptrace_cancel_bpt(current);
send_sig(SIGTRAP, current, 1);
}
return regs->ARM_r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
static int
setup_sigcontext(struct sigcontext *sc, /*struct _fpstate *fpstate,*/
struct pt_regs *regs, unsigned long mask)
{
int err = 0;
__put_user_error(regs->ARM_r0, &sc->arm_r0, err);
__put_user_error(regs->ARM_r1, &sc->arm_r1, err);
__put_user_error(regs->ARM_r2, &sc->arm_r2, err);
__put_user_error(regs->ARM_r3, &sc->arm_r3, err);
__put_user_error(regs->ARM_r4, &sc->arm_r4, err);
__put_user_error(regs->ARM_r5, &sc->arm_r5, err);
__put_user_error(regs->ARM_r6, &sc->arm_r6, err);
__put_user_error(regs->ARM_r7, &sc->arm_r7, err);
__put_user_error(regs->ARM_r8, &sc->arm_r8, err);
__put_user_error(regs->ARM_r9, &sc->arm_r9, err);
__put_user_error(regs->ARM_r10, &sc->arm_r10, err);
__put_user_error(regs->ARM_fp, &sc->arm_fp, err);
__put_user_error(regs->ARM_ip, &sc->arm_ip, err);
__put_user_error(regs->ARM_sp, &sc->arm_sp, err);
__put_user_error(regs->ARM_lr, &sc->arm_lr, err);
__put_user_error(regs->ARM_pc, &sc->arm_pc, err);
__put_user_error(current->thread.trap_no, &sc->trap_no, err);
__put_user_error(current->thread.error_code, &sc->error_code, err);
__put_user_error(current->thread.address, &sc->fault_address, err);
__put_user_error(mask, &sc->oldmask, err);
return err;
}
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
{
unsigned long sp = regs->ARM_sp;
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
sp = current->sas_ss_sp + current->sas_ss_size;
/*
* ATPCS B01 mandates 8-byte alignment
*/
return (void *)((sp - framesize) & ~7);
}
static int
setup_return(struct pt_regs *regs, struct k_sigaction *ka,
unsigned long *rc, void *frame, int usig)
{
unsigned long handler = (unsigned long)ka->sa.sa_handler;
unsigned long retcode;
if (ka->sa.sa_flags & SA_RESTORER) {
retcode = (unsigned long)ka->sa.sa_restorer;
} else {
if (__put_user((ka->sa.sa_flags & SA_SIGINFO)?SWI_SYS_RT_SIGRETURN:SWI_SYS_SIGRETURN, rc))
return 1;
retcode = ((unsigned long)rc);
}
regs->ARM_r0 = usig;
regs->ARM_sp = (unsigned long)frame;
regs->ARM_lr = retcode;
regs->ARM_pc = handler & ~3;
return 0;
}
static int
setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *regs)
{
struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
int err = 0;
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return 1;
err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
if (_NSIG_WORDS > 1) {
err |= __copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask));
}
if (err == 0)
err = setup_return(regs, ka, &frame->retcode, frame, usig);
return err;
}
static int
setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
int err = 0;
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return 1;
__put_user_error(&frame->info, &frame->pinfo, err);
__put_user_error(&frame->uc, &frame->puc, err);
err |= copy_siginfo_to_user(&frame->info, info);
/* Clear all the bits of the ucontext we don't use. */
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= setup_sigcontext(&frame->uc.uc_mcontext, /*&frame->fpstate,*/
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err == 0)
err = setup_return(regs, ka, &frame->retcode, frame, usig);
if (err == 0) {
/*
* For realtime signals we must also set the second and third
* arguments for the signal handler.
* -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
*/
regs->ARM_r1 = (unsigned long)frame->pinfo;
regs->ARM_r2 = (unsigned long)frame->puc;
}
return err;
}
static inline void restart_syscall(struct pt_regs *regs)
{
regs->ARM_r0 = regs->ARM_ORIG_r0;
regs->ARM_pc -= 4;
}
/*
* OK, we're invoking a handler
*/
static void
handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs, int syscall)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
struct k_sigaction *ka = &tsk->sighand->action[sig-1];
int usig = sig;
int ret;
/*
* If we were from a system call, check for system call restarting...
*/
if (syscall) {
switch (regs->ARM_r0) {
case -ERESTART_RESTARTBLOCK:
current_thread_info()->restart_block.fn =
do_no_restart_syscall;
case -ERESTARTNOHAND:
regs->ARM_r0 = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
regs->ARM_r0 = -EINTR;
break;
}
/* fallthrough */
case -ERESTARTNOINTR:
restart_syscall(regs);
}
}
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret == 0) {
if (ka->sa.sa_flags & SA_ONESHOT)
ka->sa.sa_handler = SIG_DFL;
spin_lock_irq(&tsk->sighand->siglock);
sigorsets(&tsk->blocked, &tsk->blocked,
&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&tsk->blocked, sig);
recalc_sigpending();
spin_unlock_irq(&tsk->sighand->siglock);
return;
}
force_sigsegv(sig, tsk);
}
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*
* Note that we go through the signals twice: once to check the signals that
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
/*
* We want the common case to go fast, which
* is why we may in certain cases get here from
* kernel mode. Just return without doing anything
* if so.
*/
if (!user_mode(regs))
return 0;
if (current->ptrace & PT_SINGLESTEP)
ptrace_cancel_bpt(current);
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
handle_signal(signr, &info, oldset, regs, syscall);
if (current->ptrace & PT_SINGLESTEP)
ptrace_set_bpt(current);
return 1;
}
/*
* No signal to deliver to the process - restart the syscall.
*/
if (syscall) {
if (regs->ARM_r0 == -ERESTART_RESTARTBLOCK) {
u32 *usp;
regs->ARM_sp -= 12;
usp = (u32 *)regs->ARM_sp;
put_user(regs->ARM_pc, &usp[0]);
/* swi __NR_restart_syscall */
put_user(0xef000000 | __NR_restart_syscall, &usp[1]);
/* ldr pc, [sp], #12 */
// FIXME!!! is #12 correct there?
put_user(0xe49df00c, &usp[2]);
regs->ARM_pc = regs->ARM_sp + 4;
}
if (regs->ARM_r0 == -ERESTARTNOHAND ||
regs->ARM_r0 == -ERESTARTSYS ||
regs->ARM_r0 == -ERESTARTNOINTR) {
restart_syscall(regs);
}
}
if (current->ptrace & PT_SINGLESTEP)
ptrace_set_bpt(current);
return 0;
}
asmlinkage void
do_notify_resume(struct pt_regs *regs, unsigned int thread_flags, int syscall)
{
if (thread_flags & _TIF_SIGPENDING)
do_signal(&current->blocked, regs, syscall);
}

323
arch/arm26/kernel/sys_arm.c
View File

@ -1,323 +0,0 @@
/*
* linux/arch/arm26/kernel/sys_arm.c
*
* Copyright (C) People who wrote linux/arch/i386/kernel/sys_i386.c
* Copyright (C) 1995, 1996 Russell King.
* Copyright (C) 2003 Ian Molton.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This file contains various random system calls that
* have a non-standard calling sequence on the Linux/arm
* platform.
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/syscalls.h>
#include <linux/mman.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/utsname.h>
#include <asm/uaccess.h>
#include <asm/ipc.h>
extern unsigned long do_mremap(unsigned long addr, unsigned long old_len,
unsigned long new_len, unsigned long flags,
unsigned long new_addr);
/*
* sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way unix traditionally does this, though.
*/
asmlinkage int sys_pipe(unsigned long * fildes)
{
int fd[2];
int error;
error = do_pipe(fd);
if (!error) {
if (copy_to_user(fildes, fd, 2*sizeof(int)))
error = -EFAULT;
}
return error;
}
/* common code for old and new mmaps */
inline long do_mmap2(
unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
int error = -EINVAL;
struct file * file = NULL;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
/*
* If we are doing a fixed mapping, and address < FIRST_USER_ADDRESS,
* then deny it.
*/
if (flags & MAP_FIXED && addr < FIRST_USER_ADDRESS)
goto out;
error = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
goto out;
}
down_write(&current->mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&current->mm->mmap_sem);
if (file)
fput(file);
out:
return error;
}
struct mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
unsigned long flags;
unsigned long fd;
unsigned long offset;
};
asmlinkage int old_mmap(struct mmap_arg_struct *arg)
{
int error = -EFAULT;
struct mmap_arg_struct a;
if (copy_from_user(&a, arg, sizeof(a)))
goto out;
error = -EINVAL;
if (a.offset & ~PAGE_MASK)
goto out;
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
out:
return error;
}
asmlinkage unsigned long
sys_arm_mremap(unsigned long addr, unsigned long old_len,
unsigned long new_len, unsigned long flags,
unsigned long new_addr)
{
unsigned long ret = -EINVAL;
/*
* If we are doing a fixed mapping, and address < FIRST_USER_ADDRESS,
* then deny it.
*/
if (flags & MREMAP_FIXED && new_addr < FIRST_USER_ADDRESS)
goto out;
down_write(&current->mm->mmap_sem);
ret = do_mremap(addr, old_len, new_len, flags, new_addr);
up_write(&current->mm->mmap_sem);
out:
return ret;
}
/*
* Perform the select(nd, in, out, ex, tv) and mmap() system
* calls.
*/
struct sel_arg_struct {
unsigned long n;
fd_set *inp, *outp, *exp;
struct timeval *tvp;
};
asmlinkage int old_select(struct sel_arg_struct *arg)
{
struct sel_arg_struct a;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
/* sys_select() does the appropriate kernel locking */
return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
}
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
*/
asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
{
int version, ret;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
return sys_semop (first, (struct sembuf *)ptr, second);
case SEMGET:
return sys_semget (first, second, third);
case SEMCTL: {
union semun fourth;
if (!ptr)
return -EINVAL;
if (get_user(fourth.__pad, (void **) ptr))
return -EFAULT;
return sys_semctl (first, second, third, fourth);
}
case MSGSND:
return sys_msgsnd (first, (struct msgbuf *) ptr,
second, third);
case MSGRCV:
switch (version) {
case 0: {
struct ipc_kludge tmp;
if (!ptr)
return -EINVAL;
if (copy_from_user(&tmp,(struct ipc_kludge *) ptr,
sizeof (tmp)))
return -EFAULT;
return sys_msgrcv (first, tmp.msgp, second,
tmp.msgtyp, third);
}
default:
return sys_msgrcv (first,
(struct msgbuf *) ptr,
second, fifth, third);
}
case MSGGET:
return sys_msgget ((key_t) first, second);
case MSGCTL:
return sys_msgctl (first, second, (struct msqid_ds *) ptr);
case SHMAT:
switch (version) {
default: {
ulong raddr;
ret = do_shmat (first, (char *) ptr, second, &raddr);
if (ret)
return ret;
return put_user (raddr, (ulong *) third);
}
case 1: /* iBCS2 emulator entry point */
if (!segment_eq(get_fs(), get_ds()))
return -EINVAL;
return do_shmat (first, (char *) ptr,
second, (ulong *) third);
}
case SHMDT:
return sys_shmdt ((char *)ptr);
case SHMGET:
return sys_shmget (first, second, third);
case SHMCTL:
return sys_shmctl (first, second,
(struct shmid_ds *) ptr);
default:
return -EINVAL;
}
}
/* Fork a new task - this creates a new program thread.
* This is called indirectly via a small wrapper
*/
asmlinkage int sys_fork(struct pt_regs *regs)
{
return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
}
/* Clone a task - this clones the calling program thread.
* This is called indirectly via a small wrapper
*/
asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, struct pt_regs *regs)
{
/*
* We don't support SETTID / CLEARTID (FIXME!!! (nicked from arm32))
*/
if (clone_flags & (CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID))
return -EINVAL;
if (!newsp)
newsp = regs->ARM_sp;
return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
}
asmlinkage int sys_vfork(struct pt_regs *regs)
{
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
}
/* sys_execve() executes a new program.
* This is called indirectly via a small wrapper
*/
asmlinkage int sys_execve(char *filenamei, char **argv, char **envp, struct pt_regs *regs)
{
int error;
char * filename;
filename = getname(filenamei);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = do_execve(filename, argv, envp, regs);
putname(filename);
out:
return error;
}
/* FIXME - see if this is correct for arm26 */
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
struct pt_regs regs;
int ret;
memset(&regs, 0, sizeof(struct pt_regs));
ret = do_execve((char *)filename, (char __user * __user *)argv, (char __user * __user *)envp, &regs);
if (ret < 0)
goto out;
/*
* Save argc to the register structure for userspace.
*/
regs.ARM_r0 = ret;
/*
* We were successful. We won't be returning to our caller, but
* instead to user space by manipulating the kernel stack.
*/
asm( "add r0, %0, %1\n\t"
"mov r1, %2\n\t"
"mov r2, %3\n\t"
"bl memmove\n\t" /* copy regs to top of stack */
"mov r8, #0\n\t" /* not a syscall */
"mov r9, %0\n\t" /* thread structure */
"mov sp, r0\n\t" /* reposition stack pointer */
"b ret_to_user"
:
: "r" (current_thread_info()),
"Ir" (THREAD_SIZE - 8 - sizeof(regs)),
"r" (&regs),
"Ir" (sizeof(regs))
: "r0", "r1", "r2", "r3", "ip", "memory");
out:
return ret;
}
EXPORT_SYMBOL(kernel_execve);

210
arch/arm26/kernel/time.c
View File

@ -1,210 +0,0 @@
/*
* linux/arch/arm26/kernel/time.c
*
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
* Modifications for ARM (C) 1994-2001 Russell King
* Mods for ARM26 (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This file contains the ARM-specific time handling details:
* reading the RTC at bootup, etc...
*
* 1994-07-02 Alan Modra
* fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
* 1998-12-20 Updated NTP code according to technical memorandum Jan '96
* "A Kernel Model for Precision Timekeeping" by Dave Mills
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/errno.h>
#include <linux/profile.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/ioc.h>
/* this needs a better home */
DEFINE_SPINLOCK(rtc_lock);
/* change this if you have some constant time drift */
#define USECS_PER_JIFFY (1000000/HZ)
static int dummy_set_rtc(void)
{
return 0;
}
/*
* hook for setting the RTC's idea of the current time.
*/
int (*set_rtc)(void) = dummy_set_rtc;
/*
* Get time offset based on IOCs timer.
* FIXME - if this is called with interrutps off, why the shennanigans
* below ?
*/
static unsigned long gettimeoffset(void)
{
unsigned int count1, count2, status;
long offset;
ioc_writeb (0, IOC_T0LATCH);
barrier ();
count1 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
barrier ();
status = ioc_readb(IOC_IRQREQA);
barrier ();
ioc_writeb (0, IOC_T0LATCH);
barrier ();
count2 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
offset = count2;
if (count2 < count1) {
/*
* We have not had an interrupt between reading count1
* and count2.
*/
if (status & (1 << 5))
offset -= LATCH;
} else if (count2 > count1) {
/*
* We have just had another interrupt between reading
* count1 and count2.
*/
offset -= LATCH;
}
offset = (LATCH - offset) * (tick_nsec / 1000);
return (offset + LATCH/2) / LATCH;
}
static unsigned long next_rtc_update;
/*
* If we have an externally synchronized linux clock, then update
* CMOS clock accordingly every ~11 minutes. set_rtc() has to be
* called as close as possible to 500 ms before the new second
* starts.
*/
static inline void do_set_rtc(void)
{
if (!ntp_synced() || set_rtc == NULL)
return;
//FIXME - timespec.tv_sec is a time_t not unsigned long
if (next_rtc_update &&
time_before((unsigned long)xtime.tv_sec, next_rtc_update))
return;
if (xtime.tv_nsec < 500000000 - ((unsigned) tick_nsec >> 1) &&
xtime.tv_nsec >= 500000000 + ((unsigned) tick_nsec >> 1))
return;
if (set_rtc())
/*
* rtc update failed. Try again in 60s
*/
next_rtc_update = xtime.tv_sec + 60;
else
next_rtc_update = xtime.tv_sec + 660;
}
#define do_leds()
void do_gettimeofday(struct timeval *tv)
{
unsigned long flags;
unsigned long seq;
unsigned long usec, sec;
do {
seq = read_seqbegin_irqsave(&xtime_lock, flags);
usec = gettimeoffset();
sec = xtime.tv_sec;
usec += xtime.tv_nsec / 1000;
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
/* usec may have gone up a lot: be safe */
while (usec >= 1000000) {
usec -= 1000000;
sec++;
}
tv->tv_sec = sec;
tv->tv_usec = usec;
}
EXPORT_SYMBOL(do_gettimeofday);
int do_settimeofday(struct timespec *tv)
{
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
write_seqlock_irq(&xtime_lock);
/*
* This is revolting. We need to set "xtime" correctly. However, the
* value in this location is the value at the most recent update of
* wall time. Discover what correction gettimeofday() would have
* done, and then undo it!
*/
tv->tv_nsec -= 1000 * gettimeoffset();
while (tv->tv_nsec < 0) {
tv->tv_nsec += NSEC_PER_SEC;
tv->tv_sec--;
}
xtime.tv_sec = tv->tv_sec;
xtime.tv_nsec = tv->tv_nsec;
ntp_clear();
write_sequnlock_irq(&xtime_lock);
clock_was_set();
return 0;
}
EXPORT_SYMBOL(do_settimeofday);
static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
do_timer(1);
#ifndef CONFIG_SMP
update_process_times(user_mode(regs));
#endif
do_set_rtc(); //FIME - EVERY timer IRQ?
profile_tick(CPU_PROFILING, regs);
return IRQ_HANDLED; //FIXME - is this right?
}
static struct irqaction timer_irq = {
.name = "timer",
.flags = IRQF_DISABLED,
.handler = timer_interrupt,
};
extern void ioctime_init(void);
/*
* Set up timer interrupt.
*/
void __init time_init(void)
{
ioc_writeb(LATCH & 255, IOC_T0LTCHL);
ioc_writeb(LATCH >> 8, IOC_T0LTCHH);
ioc_writeb(0, IOC_T0GO);
setup_irq(IRQ_TIMER, &timer_irq);
}

548
arch/arm26/kernel/traps.c
View File

@ -1,548 +0,0 @@
/*
* linux/arch/arm26/kernel/traps.c
*
* Copyright (C) 1995-2002 Russell King
* Fragments that appear the same as linux/arch/i386/kernel/traps.c (C) Linus Torvalds
* Copyright (C) 2003 Ian Molton (ARM26)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 'traps.c' handles hardware exceptions after we have saved some state in
* 'linux/arch/arm26/lib/traps.S'. Mostly a debugging aid, but will probably
* kill the offending process.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/elf.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <linux/mutex.h>
#include "ptrace.h"
extern void c_backtrace (unsigned long fp, int pmode);
extern void show_pte(struct mm_struct *mm, unsigned long addr);
const char *processor_modes[] = { "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" };
static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" "*bad reason*"};
/*
* Stack pointers should always be within the kernels view of
* physical memory. If it is not there, then we can't dump
* out any information relating to the stack.
*/
static int verify_stack(unsigned long sp)
{
if (sp < PAGE_OFFSET || (sp > (unsigned long)high_memory && high_memory != 0))
return -EFAULT;
return 0;
}
/*
* Dump out the contents of some memory nicely...
*/
static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
{
unsigned long p = bottom & ~31;
mm_segment_t fs;
int i;
/*
* We need to switch to kernel mode so that we can use __get_user
* to safely read from kernel space. Note that we now dump the
* code first, just in case the backtrace kills us.
*/
fs = get_fs();
set_fs(KERNEL_DS);
printk("%s", str);
printk("(0x%08lx to 0x%08lx)\n", bottom, top);
for (p = bottom & ~31; p < top;) {
printk("%04lx: ", p & 0xffff);
for (i = 0; i < 8; i++, p += 4) {
unsigned int val;
if (p < bottom || p >= top)
printk(" ");
else {
__get_user(val, (unsigned long *)p);
printk("%08x ", val);
}
}
printk ("\n");
}
set_fs(fs);
}
static void dump_instr(struct pt_regs *regs)
{
unsigned long addr = instruction_pointer(regs);
const int width = 8;
mm_segment_t fs;
int i;
/*
* We need to switch to kernel mode so that we can use __get_user
* to safely read from kernel space. Note that we now dump the
* code first, just in case the backtrace kills us.
*/
fs = get_fs();
set_fs(KERNEL_DS);
printk("Code: ");
for (i = -4; i < 1; i++) {
unsigned int val, bad;
bad = __get_user(val, &((u32 *)addr)[i]);
if (!bad)
printk(i == 0 ? "(%0*x) " : "%0*x ", width, val);
else {
printk("bad PC value.");
break;
}
}
printk("\n");
set_fs(fs);
}
/*static*/ void __dump_stack(struct task_struct *tsk, unsigned long sp)
{
dump_mem("Stack: ", sp, 8192+(unsigned long)task_stack_page(tsk));
}
void dump_stack(void)
{
#ifdef CONFIG_DEBUG_ERRORS
__backtrace();
#endif
}
EXPORT_SYMBOL(dump_stack);
//FIXME - was a static fn
void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
{
unsigned int fp;
int ok = 1;
printk("Backtrace: ");
fp = regs->ARM_fp;
if (!fp) {
printk("no frame pointer");
ok = 0;
} else if (verify_stack(fp)) {
printk("invalid frame pointer 0x%08x", fp);
ok = 0;
} else if (fp < (unsigned long)end_of_stack(tsk))
printk("frame pointer underflow");
printk("\n");
if (ok)
c_backtrace(fp, processor_mode(regs));
}
/* FIXME - this is probably wrong.. */
void show_stack(struct task_struct *task, unsigned long *sp) {
dump_mem("Stack: ", (unsigned long)sp, 8192+(unsigned long)task_stack_page(task));
}
DEFINE_SPINLOCK(die_lock);
/*
* This function is protected against re-entrancy.
*/
NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
{
struct task_struct *tsk = current;
console_verbose();
spin_lock_irq(&die_lock);
printk("Internal error: %s: %x\n", str, err);
printk("CPU: %d\n", smp_processor_id());
show_regs(regs);
add_taint(TAINT_DIE);
printk("Process %s (pid: %d, stack limit = 0x%p)\n",
current->comm, current->pid, end_of_stack(tsk));
if (!user_mode(regs) || in_interrupt()) {
__dump_stack(tsk, (unsigned long)(regs + 1));
dump_backtrace(regs, tsk);
dump_instr(regs);
}
while(1);
spin_unlock_irq(&die_lock);
do_exit(SIGSEGV);
}
void die_if_kernel(const char *str, struct pt_regs *regs, int err)
{
if (user_mode(regs))
return;
die(str, regs, err);
}
static DEFINE_MUTEX(undef_mutex);
static int (*undef_hook)(struct pt_regs *);
int request_undef_hook(int (*fn)(struct pt_regs *))
{
int ret = -EBUSY;
mutex_lock(&undef_mutex);
if (undef_hook == NULL) {
undef_hook = fn;
ret = 0;
}
mutex_unlock(&undef_mutex);
return ret;
}
int release_undef_hook(int (*fn)(struct pt_regs *))
{
int ret = -EINVAL;
mutex_lock(&undef_mutex);
if (undef_hook == fn) {
undef_hook = NULL;
ret = 0;
}
mutex_unlock(&undef_mutex);
return ret;
}
static int undefined_extension(struct pt_regs *regs, unsigned int op)
{
switch (op) {
case 1: /* 0xde01 / 0x?7f001f0 */
ptrace_break(current, regs);
return 0;
}
return 1;
}
asmlinkage void do_undefinstr(struct pt_regs *regs)
{
siginfo_t info;
void *pc;
regs->ARM_pc -= 4;
pc = (unsigned long *)instruction_pointer(regs); /* strip PSR */
if (user_mode(regs)) {
u32 instr;
get_user(instr, (u32 *)pc);
if ((instr & 0x0fff00ff) == 0x07f000f0 &&
undefined_extension(regs, (instr >> 8) & 255) == 0) {
regs->ARM_pc += 4;
return;
}
} else {
if (undef_hook && undef_hook(regs) == 0) {
regs->ARM_pc += 4;
return;
}
}
#ifdef CONFIG_DEBUG_USER
printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n",
current->comm, current->pid, pc);
dump_instr(regs);
#endif
current->thread.error_code = 0;
current->thread.trap_no = 6;
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = ILL_ILLOPC;
info.si_addr = pc;
force_sig_info(SIGILL, &info, current);
die_if_kernel("Oops - undefined instruction", regs, 0);
}
asmlinkage void do_excpt(unsigned long address, struct pt_regs *regs, int mode)
{
siginfo_t info;
#ifdef CONFIG_DEBUG_USER
printk(KERN_INFO "%s (%d): address exception: pc=%08lx\n",
current->comm, current->pid, instruction_pointer(regs));
dump_instr(regs);
#endif
current->thread.error_code = 0;
current->thread.trap_no = 11;
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRERR;
info.si_addr = (void *)address;
force_sig_info(SIGBUS, &info, current);
die_if_kernel("Oops - address exception", regs, mode);
}
asmlinkage void do_unexp_fiq (struct pt_regs *regs)
{
#ifndef CONFIG_IGNORE_FIQ
printk("Hmm. Unexpected FIQ received, but trying to continue\n");
printk("You may have a hardware problem...\n");
#endif
}
/*
* bad_mode handles the impossible case in the vectors. If you see one of
* these, then it's extremely serious, and could mean you have buggy hardware.
* It never returns, and never tries to sync. We hope that we can at least
* dump out some state information...
*/
asmlinkage void bad_mode(struct pt_regs *regs, int reason, int proc_mode)
{
unsigned int vectors = vectors_base();
console_verbose();
printk(KERN_CRIT "Bad mode in %s handler detected: mode %s\n",
handler[reason<5?reason:4], processor_modes[proc_mode]);
/*
* Dump out the vectors and stub routines. Maybe a better solution
* would be to dump them out only if we detect that they are corrupted.
*/
dump_mem(KERN_CRIT "Vectors: ", vectors, vectors + 0x40);
dump_mem(KERN_CRIT "Stubs: ", vectors + 0x200, vectors + 0x4b8);
die("Oops", regs, 0);
local_irq_disable();
panic("bad mode");
}
static int bad_syscall(int n, struct pt_regs *regs)
{
struct thread_info *thread = current_thread_info();
siginfo_t info;
if (current->personality != PER_LINUX && thread->exec_domain->handler) {
thread->exec_domain->handler(n, regs);
return regs->ARM_r0;
}
#ifdef CONFIG_DEBUG_USER
printk(KERN_ERR "[%d] %s: obsolete system call %08x.\n",
current->pid, current->comm, n);
dump_instr(regs);
#endif
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = ILL_ILLTRP;
info.si_addr = (void *)instruction_pointer(regs) - 4;
force_sig_info(SIGILL, &info, current);
die_if_kernel("Oops", regs, n);
return regs->ARM_r0;
}
static inline void
do_cache_op(unsigned long start, unsigned long end, int flags)
{
struct vm_area_struct *vma;
if (end < start)
return;
vma = find_vma(current->active_mm, start);
if (vma && vma->vm_start < end) {
if (start < vma->vm_start)
start = vma->vm_start;
if (end > vma->vm_end)
end = vma->vm_end;
}
}
/*
* Handle all unrecognised system calls.
* 0x9f0000 - 0x9fffff are some more esoteric system calls
*/
#define NR(x) ((__ARM_NR_##x) - __ARM_NR_BASE)
asmlinkage int arm_syscall(int no, struct pt_regs *regs)
{
siginfo_t info;
if ((no >> 16) != 0x9f)
return bad_syscall(no, regs);
switch (no & 0xffff) {
case 0: /* branch through 0 */
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = SEGV_MAPERR;
info.si_addr = NULL;
force_sig_info(SIGSEGV, &info, current);
die_if_kernel("branch through zero", regs, 0);
return 0;
case NR(breakpoint): /* SWI BREAK_POINT */
ptrace_break(current, regs);
return regs->ARM_r0;
case NR(cacheflush):
return 0;
case NR(usr26):
break;
default:
/* Calls 9f00xx..9f07ff are defined to return -ENOSYS
if not implemented, rather than raising SIGILL. This
way the calling program can gracefully determine whether
a feature is supported. */
if (no <= 0x7ff)
return -ENOSYS;
break;
}
#ifdef CONFIG_DEBUG_USER
/*
* experience shows that these seem to indicate that
* something catastrophic has happened
*/
printk("[%d] %s: arm syscall %d\n", current->pid, current->comm, no);
dump_instr(regs);
if (user_mode(regs)) {
show_regs(regs);
c_backtrace(regs->ARM_fp, processor_mode(regs));
}
#endif
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = ILL_ILLTRP;
info.si_addr = (void *)instruction_pointer(regs) - 4;
force_sig_info(SIGILL, &info, current);
die_if_kernel("Oops", regs, no);
return 0;
}
void __bad_xchg(volatile void *ptr, int size)
{
printk("xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
__builtin_return_address(0), ptr, size);
BUG();
}
/*
* A data abort trap was taken, but we did not handle the instruction.
* Try to abort the user program, or panic if it was the kernel.
*/
asmlinkage void
baddataabort(int code, unsigned long instr, struct pt_regs *regs)
{
unsigned long addr = instruction_pointer(regs);
siginfo_t info;
#ifdef CONFIG_DEBUG_USER
printk(KERN_ERR "[%d] %s: bad data abort: code %d instr 0x%08lx\n",
current->pid, current->comm, code, instr);
dump_instr(regs);
show_pte(current->mm, addr);
#endif
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = ILL_ILLOPC;
info.si_addr = (void *)addr;
force_sig_info(SIGILL, &info, current);
die_if_kernel("unknown data abort code", regs, instr);
}
volatile void __bug(const char *file, int line, void *data)
{
printk(KERN_CRIT"kernel BUG at %s:%d!", file, line);
if (data)
printk(KERN_CRIT" - extra data = %p", data);
printk("\n");
*(int *)0 = 0;
}
void __readwrite_bug(const char *fn)
{
printk("%s called, but not implemented", fn);
BUG();
}
void __pte_error(const char *file, int line, unsigned long val)
{
printk("%s:%d: bad pte %08lx.\n", file, line, val);
}
void __pmd_error(const char *file, int line, unsigned long val)
{
printk("%s:%d: bad pmd %08lx.\n", file, line, val);
}
void __pgd_error(const char *file, int line, unsigned long val)
{
printk("%s:%d: bad pgd %08lx.\n", file, line, val);
}
asmlinkage void __div0(void)
{
printk("Division by zero in kernel.\n");
dump_stack();
}
void abort(void)
{
BUG();
/* if that doesn't kill us, halt */
panic("Oops failed to kill thread");
}
void __init trap_init(void)
{
extern void __trap_init(unsigned long);
unsigned long base = vectors_base();
__trap_init(base);
if (base != 0)
printk(KERN_DEBUG "Relocating machine vectors to 0x%08lx\n",
base);
}

136
arch/arm26/kernel/vmlinux-arm26-xip.lds.in
View File

@ -1,136 +0,0 @@
/* ld script to make ARM Linux kernel
* taken from the i386 version by Russell King
* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
* borrowed from Russels ARM port by Ian Molton
*/
#include <asm-generic/vmlinux.lds.h>
OUTPUT_ARCH(arm)
ENTRY(stext)
jiffies = jiffies_64;
SECTIONS
{
. = TEXTADDR;
.init : { /* Init code and data */
_stext = .;
__init_begin = .;
_sinittext = .;
*(.init.text)
_einittext = .;
__proc_info_begin = .;
*(.proc.info)
__proc_info_end = .;
__arch_info_begin = .;
*(.arch.info)
__arch_info_end = .;
__tagtable_begin = .;
*(.taglist)
__tagtable_end = .;
. = ALIGN(16);
__setup_start = .;
*(.init.setup)
__setup_end = .;
__early_begin = .;
*(__early_param)
__early_end = .;
__initcall_start = .;
*(.initcall1.init)
*(.initcall2.init)
*(.initcall3.init)
*(.initcall4.init)
*(.initcall5.init)
*(.initcall6.init)
*(.initcall7.init)
__initcall_end = .;
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
#ifdef CONFIG_BLK_DEV_INITRD
. = ALIGN(32);
__initramfs_start = .;
usr/built-in.o(.init.ramfs)
__initramfs_end = .;
#endif
. = ALIGN(32768);
__init_end = .;
}
/DISCARD/ : { /* Exit code and data */
*(.exit.text)
*(.exit.data)
*(.exitcall.exit)
}
.text : { /* Real text segment */
_text = .; /* Text and read-only data */
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT /* FIXME - borrowed from arm32 - check*/
*(.fixup)
*(.gnu.warning)
*(.rodata)
*(.rodata.*)
*(.glue_7)
*(.glue_7t)
*(.got) /* Global offset table */
_etext = .; /* End of text section */
}
. = ALIGN(16);
__ex_table : { /* Exception table */
__start___ex_table = .;
*(__ex_table)
__stop___ex_table = .;
}
RODATA
_endtext = .;
. = DATAADDR;
_sdata = .;
.data : {
. = ALIGN(8192);
/*
* first, the init thread union, aligned
* to an 8192 byte boundary. (see arm26/kernel/init_task.c)
* FIXME - sould this be 32K aligned on arm26?
*/
*(.init.task)
/*
* The cacheline aligned data
*/
. = ALIGN(32);
*(.data.cacheline_aligned)
/*
* and the usual data section
*/
DATA_DATA
CONSTRUCTORS
*(.init.data)
_edata = .;
}
.bss : {
__bss_start = .; /* BSS */
*(.bss)
*(COMMON)
_end = . ;
}
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
}

129
arch/arm26/kernel/vmlinux-arm26.lds.in
View File

@ -1,129 +0,0 @@
/* ld script to make ARM Linux kernel
* taken from the i386 version by Russell King
* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
* borrowed from Russels ARM port by Ian Molton and subsequently modified.
*/
#include <asm-generic/vmlinux.lds.h>
OUTPUT_ARCH(arm)
ENTRY(stext)
jiffies = jiffies_64;
SECTIONS
{
. = TEXTADDR;
.init : { /* Init code and data */
_stext = .;
__init_begin = .;
_sinittext = .;
*(.init.text)
_einittext = .;
__proc_info_begin = .;
*(.proc.info)
__proc_info_end = .;
__arch_info_begin = .;
*(.arch.info)
__arch_info_end = .;
__tagtable_begin = .;
*(.taglist)
__tagtable_end = .;
*(.init.data)
. = ALIGN(16);
__setup_start = .;
*(.init.setup)
__setup_end = .;
__early_begin = .;
*(__early_param)
__early_end = .;
__initcall_start = .;
*(.initcall1.init)
*(.initcall2.init)
*(.initcall3.init)
*(.initcall4.init)
*(.initcall5.init)
*(.initcall6.init)
*(.initcall7.init)
__initcall_end = .;
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
#ifdef CONFIG_BLK_DEV_INITRD
. = ALIGN(32);
__initramfs_start = .;
usr/built-in.o(.init.ramfs)
__initramfs_end = .;
#endif
. = ALIGN(32768);
__init_end = .;
}
/DISCARD/ : { /* Exit code and data */
*(.exit.text)
*(.exit.data)
*(.exitcall.exit)
}
.text : { /* Real text segment */
_text = .; /* Text and read-only data */
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
*(.fixup)
*(.gnu.warning)
*(.rodata)
*(.rodata.*)
*(.glue_7)
*(.glue_7t)
*(.got) /* Global offset table */
_etext = .; /* End of text section */
}
. = ALIGN(16);
__ex_table : { /* Exception table */
__start___ex_table = .;
*(__ex_table)
__stop___ex_table = .;
}
RODATA
. = ALIGN(8192);
.data : {
/*
* first, the init task union, aligned
* to an 8192 byte boundary. (see arm26/kernel/init_task.c)
*/
*(.init.task)
/*
* The cacheline aligned data
*/
. = ALIGN(32);
*(.data.cacheline_aligned)
/*
* and the usual data section
*/
DATA_DATA
CONSTRUCTORS
_edata = .;
}
.bss : {
__bss_start = .; /* BSS */
*(.bss)
*(COMMON)
_end = . ;
}
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
}

11
arch/arm26/kernel/vmlinux.lds.S
View File

@ -1,11 +0,0 @@
#ifdef CONFIG_XIP_KERNEL
#include "vmlinux-arm26-xip.lds.in"
#else
#include "vmlinux-arm26.lds.in"
#endif

26
arch/arm26/lib/Makefile
View File

@ -1,26 +0,0 @@
#
# linux/arch/arm26/lib/Makefile
#
# Copyright (C) 1995-2000 Russell King
#
lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \
csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
copy_page.o delay.o findbit.o memchr.o memcpy.o \
memset.o memzero.o setbit.o \
strchr.o strrchr.o testchangebit.o \
testclearbit.o testsetbit.o getuser.o \
putuser.o ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
ucmpdi2.o udivdi3.o lib1funcs.o ecard.o io-acorn.o \
floppydma.o io-readsb.o io-writesb.o io-writesl.o \
uaccess-kernel.o uaccess-user.o io-readsw.o \
io-writesw.o io-readsl.o ecard.o io-acorn.o \
floppydma.o
lib-n :=
lib-$(CONFIG_VT)+= kbd.o
csumpartialcopy.o: csumpartialcopygeneric.S
csumpartialcopyuser.o: csumpartialcopygeneric.S

61
arch/arm26/lib/ashldi3.c
View File

@ -1,61 +0,0 @@
/* More subroutines needed by GCC output code on some machines. */
/* Compile this one with gcc. */
/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* As a special exception, if you link this library with other files,
some of which are compiled with GCC, to produce an executable,
this library does not by itself cause the resulting executable
to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License.
*/
/* support functions required by the kernel. based on code from gcc-2.95.3 */
/* I Molton 29/07/01 */
#include "gcclib.h"
DItype
__ashldi3 (DItype u, word_type b)
{
DIunion w;
word_type bm;
DIunion uu;
if (b == 0)
return u;
uu.ll = u;
bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
w.s.low = 0;
w.s.high = (USItype)uu.s.low << -bm;
}
else
{
USItype carries = (USItype)uu.s.low >> bm;
w.s.low = (USItype)uu.s.low << b;
w.s.high = ((USItype)uu.s.high << b) | carries;
}
return w.ll;
}

61
arch/arm26/lib/ashrdi3.c
View File

@ -1,61 +0,0 @@
/* More subroutines needed by GCC output code on some machines. */
/* Compile this one with gcc. */
/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* As a special exception, if you link this library with other files,
some of which are compiled with GCC, to produce an executable,
this library does not by itself cause the resulting executable
to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License.
*/
/* support functions required by the kernel. based on code from gcc-2.95.3 */
/* I Molton 29/07/01 */
#include "gcclib.h"
DItype
__ashrdi3 (DItype u, word_type b)
{
DIunion w;
word_type bm;
DIunion uu;
if (b == 0)
return u;
uu.ll = u;
bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
/* w.s.high = 1..1 or 0..0 */
w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1);
w.s.low = uu.s.high >> -bm;
}
else
{
USItype carries = (USItype)uu.s.high << bm;
w.s.high = uu.s.high >> b;
w.s.low = ((USItype)uu.s.low >> b) | carries;
}
return w.ll;
}

144
arch/arm26/lib/backtrace.S
View File

@ -1,144 +0,0 @@
/*
* linux/arch/arm26/lib/backtrace.S
*
* Copyright (C) 1995, 1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
@ fp is 0 or stack frame
#define frame r4
#define next r5
#define save r6
#define mask r7
#define offset r8
ENTRY(__backtrace)
mov r1, #0x10
mov r0, fp
ENTRY(c_backtrace)
#ifdef CONFIG_NO_FRAME_POINTER
mov pc, lr
#else
stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location...
mov mask, #0xfc000003
tst mask, r0
movne r0, #0
movs frame, r0
1: moveq r0, #-2
LOADREGS(eqfd, sp!, {r4 - r8, pc})
2: stmfd sp!, {pc} @ calculate offset of PC in STMIA instruction
ldr r0, [sp], #4
adr r1, 2b - 4
sub offset, r0, r1
3: tst frame, mask @ Check for address exceptions...
bne 1b
1001: ldr next, [frame, #-12] @ get fp
1002: ldr r2, [frame, #-4] @ get lr
1003: ldr r3, [frame, #0] @ get pc
sub save, r3, offset @ Correct PC for prefetching
bic save, save, mask
1004: ldr r1, [save, #0] @ get instruction at function
mov r1, r1, lsr #10
ldr r3, .Ldsi+4
teq r1, r3
subeq save, save, #4
adr r0, .Lfe
mov r1, save
bic r2, r2, mask
bl printk @ print pc and link register
ldr r0, [frame, #-8] @ get sp
sub r0, r0, #4
1005: ldr r1, [save, #4] @ get instruction at function+4
mov r3, r1, lsr #10
ldr r2, .Ldsi+4
teq r3, r2 @ Check for stmia sp!, {args}
addeq save, save, #4 @ next instruction
bleq .Ldumpstm
sub r0, frame, #16
1006: ldr r1, [save, #4] @ Get 'stmia sp!, {rlist, fp, ip, lr, pc}' instruction
mov r3, r1, lsr #10
ldr r2, .Ldsi
teq r3, r2
bleq .Ldumpstm
teq frame, next
movne frame, next
teqne frame, #0
bne 3b
LOADREGS(fd, sp!, {r4 - r8, pc})
/*
* Fixup for LDMDB
*/
.section .fixup,"ax"
.align 0
1007: ldr r0, =.Lbad
mov r1, frame
bl printk
LOADREGS(fd, sp!, {r4 - r8, pc})
.ltorg
.previous
.section __ex_table,"a"
.align 3
.long 1001b, 1007b
.long 1002b, 1007b
.long 1003b, 1007b
.long 1004b, 1007b
.long 1005b, 1007b
.long 1006b, 1007b
.previous
#define instr r4
#define reg r5
#define stack r6
.Ldumpstm: stmfd sp!, {instr, reg, stack, r7, lr}
mov stack, r0
mov instr, r1
mov reg, #9
mov r7, #0
1: mov r3, #1
tst instr, r3, lsl reg
beq 2f
add r7, r7, #1
teq r7, #4
moveq r7, #0
moveq r3, #'\n'
movne r3, #' '
ldr r2, [stack], #-4
mov r1, reg
adr r0, .Lfp
bl printk
2: subs reg, reg, #1
bpl 1b
teq r7, #0
adrne r0, .Lcr
blne printk
mov r0, stack
LOADREGS(fd, sp!, {instr, reg, stack, r7, pc})
.Lfe: .asciz "Function entered at [<%p>] from [<%p>]\n"
.Lfp: .asciz " r%d = %08X%c"
.Lcr: .asciz "\n"
.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
.align
.Ldsi: .word 0x00e92dd8 >> 2
.word 0x00e92d00 >> 2
#endif

28
arch/arm26/lib/changebit.S
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@ -1,28 +0,0 @@
/*
* linux/arch/arm26/lib/changebit.S
*
* Copyright (C) 1995-1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
/* Purpose : Function to change a bit
* Prototype: int change_bit(int bit, void *addr)
*/
ENTRY(_change_bit_be)
eor r0, r0, #0x18 @ big endian byte ordering
ENTRY(_change_bit_le)
and r2, r0, #7
mov r3, #1
mov r3, r3, lsl r2
save_and_disable_irqs ip, r2
ldrb r2, [r1, r0, lsr #3]
eor r2, r2, r3
strb r2, [r1, r0, lsr #3]
restore_irqs ip
RETINSTR(mov,pc,lr)

31
arch/arm26/lib/clearbit.S
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@ -1,31 +0,0 @@
/*
* linux/arch/arm26/lib/clearbit.S
*
* Copyright (C) 1995-1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
/*
* Purpose : Function to clear a bit
* Prototype: int clear_bit(int bit, void *addr)
*/
ENTRY(_clear_bit_be)
eor r0, r0, #0x18 @ big endian byte ordering
ENTRY(_clear_bit_le)
and r2, r0, #7
mov r3, #1
mov r3, r3, lsl r2
save_and_disable_irqs ip, r2
ldrb r2, [r1, r0, lsr #3]
bic r2, r2, r3
strb r2, [r1, r0, lsr #3]
restore_irqs ip
RETINSTR(mov,pc,lr)

62
arch/arm26/lib/copy_page.S
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@ -1,62 +0,0 @@
/*
* linux/arch/arm26/lib/copypage.S
*
* Copyright (C) 1995-1999 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ASM optimised string functions
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
.text
.align 5
/*
* ARMv3 optimised copy_user_page
*
* FIXME: rmk do we need to handle cache stuff...
* FIXME: im is this right on ARM26?
*/
ENTRY(__copy_user_page)
stmfd sp!, {r4, lr} @ 2
mov r2, #PAGE_SZ/64 @ 1
ldmia r1!, {r3, r4, ip, lr} @ 4+1
1: stmia r0!, {r3, r4, ip, lr} @ 4
ldmia r1!, {r3, r4, ip, lr} @ 4+1
stmia r0!, {r3, r4, ip, lr} @ 4
ldmia r1!, {r3, r4, ip, lr} @ 4+1
stmia r0!, {r3, r4, ip, lr} @ 4
ldmia r1!, {r3, r4, ip, lr} @ 4
subs r2, r2, #1 @ 1
stmia r0!, {r3, r4, ip, lr} @ 4
ldmneia r1!, {r3, r4, ip, lr} @ 4
bne 1b @ 1
LOADREGS(fd, sp!, {r4, pc}) @ 3
.align 5
/*
* ARMv3 optimised clear_user_page
*
* FIXME: rmk do we need to handle cache stuff...
*/
ENTRY(__clear_user_page)
str lr, [sp, #-4]!
mov r1, #PAGE_SZ/64 @ 1
mov r2, #0 @ 1
mov r3, #0 @ 1
mov ip, #0 @ 1
mov lr, #0 @ 1
1: stmia r0!, {r2, r3, ip, lr} @ 4
stmia r0!, {r2, r3, ip, lr} @ 4
stmia r0!, {r2, r3, ip, lr} @ 4
stmia r0!, {r2, r3, ip, lr} @ 4
subs r1, r1, #1 @ 1
bne 1b @ 1
ldr pc, [sp], #4
.section ".init.text", #alloc, #execinstr

32
arch/arm26/lib/csumipv6.S
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/*
* linux/arch/arm26/lib/csumipv6.S
*
* Copyright (C) 1995-1998 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
ENTRY(__csum_ipv6_magic)
str lr, [sp, #-4]!
adds ip, r2, r3
ldmia r1, {r1 - r3, lr}
adcs ip, ip, r1
adcs ip, ip, r2
adcs ip, ip, r3
adcs ip, ip, lr
ldmia r0, {r0 - r3}
adcs r0, ip, r0
adcs r0, r0, r1
adcs r0, r0, r2
ldr r2, [sp, #4]
adcs r0, r0, r3
adcs r0, r0, r2
adcs r0, r0, #0
LOADREGS(fd, sp!, {pc})

130
arch/arm26/lib/csumpartial.S
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@ -1,130 +0,0 @@
/*
* linux/arch/arm26/lib/csumpartial.S
*
* Copyright (C) 1995-1998 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
/*
* Function: __u32 csum_partial(const char *src, int len, __u32 sum)
* Params : r0 = buffer, r1 = len, r2 = checksum
* Returns : r0 = new checksum
*/
buf .req r0
len .req r1
sum .req r2
td0 .req r3
td1 .req r4 @ save before use
td2 .req r5 @ save before use
td3 .req lr
.zero: mov r0, sum
add sp, sp, #4
ldr pc, [sp], #4
/*
* Handle 0 to 7 bytes, with any alignment of source and
* destination pointers. Note that when we get here, C = 0
*/
.less8: teq len, #0 @ check for zero count
beq .zero
/* we must have at least one byte. */
tst buf, #1 @ odd address?
ldrneb td0, [buf], #1
subne len, len, #1
adcnes sum, sum, td0, lsl #byte(1)
.less4: tst len, #6
beq .less8_byte
/* we are now half-word aligned */
.less8_wordlp:
#if __LINUX_ARM_ARCH__ >= 4
ldrh td0, [buf], #2
sub len, len, #2
#else
ldrb td0, [buf], #1
ldrb td3, [buf], #1
sub len, len, #2
orr td0, td0, td3, lsl #8
#endif
adcs sum, sum, td0
tst len, #6
bne .less8_wordlp
.less8_byte: tst len, #1 @ odd number of bytes
ldrneb td0, [buf], #1 @ include last byte
adcnes sum, sum, td0, lsl #byte(0) @ update checksum
.done: adc r0, sum, #0 @ collect up the last carry
ldr td0, [sp], #4
tst td0, #1 @ check buffer alignment
movne td0, r0, lsl #8 @ rotate checksum by 8 bits
orrne r0, td0, r0, lsr #24
ldr pc, [sp], #4 @ return
.not_aligned: tst buf, #1 @ odd address
ldrneb td0, [buf], #1 @ make even
subne len, len, #1
adcnes sum, sum, td0, lsl #byte(1) @ update checksum
tst buf, #2 @ 32-bit aligned?
#if __LINUX_ARM_ARCH__ >= 4
ldrneh td0, [buf], #2 @ make 32-bit aligned
subne len, len, #2
#else
ldrneb td0, [buf], #1
ldrneb ip, [buf], #1
subne len, len, #2
orrne td0, td0, ip, lsl #8
#endif
adcnes sum, sum, td0 @ update checksum
mov pc, lr
ENTRY(csum_partial)
stmfd sp!, {buf, lr}
cmp len, #8 @ Ensure that we have at least
blo .less8 @ 8 bytes to copy.
adds sum, sum, #0 @ C = 0
tst buf, #3 @ Test destination alignment
blne .not_aligned @ aligh destination, return here
1: bics ip, len, #31
beq 3f
stmfd sp!, {r4 - r5}
2: ldmia buf!, {td0, td1, td2, td3}
adcs sum, sum, td0
adcs sum, sum, td1
adcs sum, sum, td2
adcs sum, sum, td3
ldmia buf!, {td0, td1, td2, td3}
adcs sum, sum, td0
adcs sum, sum, td1
adcs sum, sum, td2
adcs sum, sum, td3
sub ip, ip, #32
teq ip, #0
bne 2b
ldmfd sp!, {r4 - r5}
3: tst len, #0x1c @ should not change C
beq .less4
4: ldr td0, [buf], #4
sub len, len, #4
adcs sum, sum, td0
tst len, #0x1c
bne 4b
b .less4

52
arch/arm26/lib/csumpartialcopy.S
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@ -1,52 +0,0 @@
/*
* linux/arch/arm26/lib/csumpartialcopy.S
*
* Copyright (C) 1995-1998 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
/* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
* Params : r0 = src, r1 = dst, r2 = len, r3 = checksum
* Returns : r0 = new checksum
*/
.macro save_regs
stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc}
.endm
.macro load_regs,flags
LOADREGS(\flags,fp,{r1, r4 - r8, fp, sp, pc})
.endm
.macro load1b, reg1
ldrb \reg1, [r0], #1
.endm
.macro load2b, reg1, reg2
ldrb \reg1, [r0], #1
ldrb \reg2, [r0], #1
.endm
.macro load1l, reg1
ldr \reg1, [r0], #4
.endm
.macro load2l, reg1, reg2
ldr \reg1, [r0], #4
ldr \reg2, [r0], #4
.endm
.macro load4l, reg1, reg2, reg3, reg4
ldmia r0!, {\reg1, \reg2, \reg3, \reg4}
.endm
#define FN_ENTRY ENTRY(csum_partial_copy_nocheck)
#include "csumpartialcopygeneric.S"

352
arch/arm26/lib/csumpartialcopygeneric.S
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@ -1,352 +0,0 @@
/*
* linux/arch/arm26/lib/csumpartialcopygeneric.S
*
* Copyright (C) 1995-2001 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* JMA 01/06/03 Commented out some shl0s; probobly irrelevant to arm26
*
*/
/*
* unsigned int
* csum_partial_copy_xxx(const char *src, char *dst, int len, int sum, )
* r0 = src, r1 = dst, r2 = len, r3 = sum
* Returns : r0 = checksum
*
* Note that 'tst' and 'teq' preserve the carry flag.
*/
/* Quick hack */
.macro save_regs
stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc}
.endm
/* end Quick Hack */
src .req r0
dst .req r1
len .req r2
sum .req r3
.zero: mov r0, sum
load_regs ea
/*
* Align an unaligned destination pointer. We know that
* we have >= 8 bytes here, so we don't need to check
* the length. Note that the source pointer hasn't been
* aligned yet.
*/
.dst_unaligned: tst dst, #1
beq .dst_16bit
load1b ip
sub len, len, #1
adcs sum, sum, ip, lsl #byte(1) @ update checksum
strb ip, [dst], #1
tst dst, #2
moveq pc, lr @ dst is now 32bit aligned
.dst_16bit: load2b r8, ip
sub len, len, #2
adcs sum, sum, r8, lsl #byte(0)
strb r8, [dst], #1
adcs sum, sum, ip, lsl #byte(1)
strb ip, [dst], #1
mov pc, lr @ dst is now 32bit aligned
/*
* Handle 0 to 7 bytes, with any alignment of source and
* destination pointers. Note that when we get here, C = 0
*/
.less8: teq len, #0 @ check for zero count
beq .zero
/* we must have at least one byte. */
tst dst, #1 @ dst 16-bit aligned
beq .less8_aligned
/* Align dst */
load1b ip
sub len, len, #1
adcs sum, sum, ip, lsl #byte(1) @ update checksum
strb ip, [dst], #1
tst len, #6
beq .less8_byteonly
1: load2b r8, ip
sub len, len, #2
adcs sum, sum, r8, lsl #byte(0)
strb r8, [dst], #1
adcs sum, sum, ip, lsl #byte(1)
strb ip, [dst], #1
.less8_aligned: tst len, #6
bne 1b
.less8_byteonly:
tst len, #1
beq .done
load1b r8
adcs sum, sum, r8, lsl #byte(0) @ update checksum
strb r8, [dst], #1
b .done
FN_ENTRY
mov ip, sp
save_regs
sub fp, ip, #4
cmp len, #8 @ Ensure that we have at least
blo .less8 @ 8 bytes to copy.
adds sum, sum, #0 @ C = 0
tst dst, #3 @ Test destination alignment
blne .dst_unaligned @ align destination, return here
/*
* Ok, the dst pointer is now 32bit aligned, and we know
* that we must have more than 4 bytes to copy. Note
* that C contains the carry from the dst alignment above.
*/
tst src, #3 @ Test source alignment
bne .src_not_aligned
/* Routine for src & dst aligned */
bics ip, len, #15
beq 2f
1: load4l r4, r5, r6, r7
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
sub ip, ip, #16
teq ip, #0
bne 1b
2: ands ip, len, #12
beq 4f
tst ip, #8
beq 3f
load2l r4, r5
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
tst ip, #4
beq 4f
3: load1l r4
str r4, [dst], #4
adcs sum, sum, r4
4: ands len, len, #3
beq .done
load1l r4
tst len, #2
/* mov r5, r4, lsr #byte(0)
FIXME? 0 Shift anyhow!
*/
beq .exit
adcs sum, sum, r4, push #16
strb r5, [dst], #1
mov r5, r4, lsr #byte(1)
strb r5, [dst], #1
mov r5, r4, lsr #byte(2)
.exit: tst len, #1
strneb r5, [dst], #1
andne r5, r5, #255
adcnes sum, sum, r5, lsl #byte(0)
/*
* If the dst pointer was not 16-bit aligned, we
* need to rotate the checksum here to get around
* the inefficient byte manipulations in the
* architecture independent code.
*/
.done: adc r0, sum, #0
ldr sum, [sp, #0] @ dst
tst sum, #1
movne sum, r0, lsl #8
orrne r0, sum, r0, lsr #24
load_regs ea
.src_not_aligned:
adc sum, sum, #0 @ include C from dst alignment
and ip, src, #3
bic src, src, #3
load1l r5
cmp ip, #2
beq .src2_aligned
bhi .src3_aligned
mov r4, r5, pull #8 @ C = 0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, push #24
mov r5, r5, pull #8
orr r5, r5, r6, push #24
mov r6, r6, pull #8
orr r6, r6, r7, push #24
mov r7, r7, pull #8
orr r7, r7, r8, push #24
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, pull #8
sub ip, ip, #16
teq ip, #0
bne 1b
2: ands ip, len, #12
beq 4f
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, push #24
mov r5, r5, pull #8
orr r5, r5, r6, push #24
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, pull #8
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, push #24
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, pull #8
4: ands len, len, #3
beq .done
/* mov r5, r4, lsr #byte(0)
FIXME? 0 Shift anyhow
*/
tst len, #2
beq .exit
adcs sum, sum, r4, push #16
strb r5, [dst], #1
mov r5, r4, lsr #byte(1)
strb r5, [dst], #1
mov r5, r4, lsr #byte(2)
b .exit
.src2_aligned: mov r4, r5, pull #16
adds sum, sum, #0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, push #16
mov r5, r5, pull #16
orr r5, r5, r6, push #16
mov r6, r6, pull #16
orr r6, r6, r7, push #16
mov r7, r7, pull #16
orr r7, r7, r8, push #16
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, pull #16
sub ip, ip, #16
teq ip, #0
bne 1b
2: ands ip, len, #12
beq 4f
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, push #16
mov r5, r5, pull #16
orr r5, r5, r6, push #16
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, pull #16
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, push #16
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, pull #16
4: ands len, len, #3
beq .done
/* mov r5, r4, lsr #byte(0)
FIXME? 0 Shift anyhow
*/
tst len, #2
beq .exit
adcs sum, sum, r4
strb r5, [dst], #1
mov r5, r4, lsr #byte(1)
strb r5, [dst], #1
tst len, #1
beq .done
load1b r5
b .exit
.src3_aligned: mov r4, r5, pull #24
adds sum, sum, #0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, push #8
mov r5, r5, pull #24
orr r5, r5, r6, push #8
mov r6, r6, pull #24
orr r6, r6, r7, push #8
mov r7, r7, pull #24
orr r7, r7, r8, push #8
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, pull #24
sub ip, ip, #16
teq ip, #0
bne 1b
2: ands ip, len, #12
beq 4f
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, push #8
mov r5, r5, pull #24
orr r5, r5, r6, push #8
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, pull #24
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, push #8
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, pull #24
4: ands len, len, #3
beq .done
/* mov r5, r4, lsr #byte(0)
FIXME? 0 Shift anyhow
*/
tst len, #2
beq .exit
strb r5, [dst], #1
adcs sum, sum, r4
load1l r4
/* mov r5, r4, lsr #byte(0)
FIXME? 0 Shift anyhow
*/
strb r5, [dst], #1
adcs sum, sum, r4, push #24
mov r5, r4, lsr #byte(1)
b .exit

114
arch/arm26/lib/csumpartialcopyuser.S
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@ -1,114 +0,0 @@
/*
* linux/arch/arm26/lib/csumpartialcopyuser.S
*
* Copyright (C) 1995-1998 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/errno.h>
#include <asm/asm-offsets.h>
.text
.macro save_regs
stmfd sp!, {r1 - r2, r4 - r9, fp, ip, lr, pc}
mov r9, sp, lsr #13
mov r9, r9, lsl #13
ldr r9, [r9, #TSK_ADDR_LIMIT]
mov r9, r9, lsr #24
.endm
.macro load_regs,flags
ldm\flags fp, {r1, r2, r4-r9, fp, sp, pc}^
.endm
.macro load1b, reg1
tst r9, #0x01
9999: ldreqbt \reg1, [r0], #1
ldrneb \reg1, [r0], #1
.section __ex_table, "a"
.align 3
.long 9999b, 6001f
.previous
.endm
.macro load2b, reg1, reg2
tst r9, #0x01
9999: ldreqbt \reg1, [r0], #1
ldrneb \reg1, [r0], #1
9998: ldreqbt \reg2, [r0], #1
ldrneb \reg2, [r0], #1
.section __ex_table, "a"
.long 9999b, 6001f
.long 9998b, 6001f
.previous
.endm
.macro load1l, reg1
tst r9, #0x01
9999: ldreqt \reg1, [r0], #4
ldrne \reg1, [r0], #4
.section __ex_table, "a"
.align 3
.long 9999b, 6001f
.previous
.endm
.macro load2l, reg1, reg2
tst r9, #0x01
ldmneia r0!, {\reg1, \reg2}
9999: ldreqt \reg1, [r0], #4
9998: ldreqt \reg2, [r0], #4
.section __ex_table, "a"
.long 9999b, 6001f
.long 9998b, 6001f
.previous
.endm
.macro load4l, reg1, reg2, reg3, reg4
tst r9, #0x01
ldmneia r0!, {\reg1, \reg2, \reg3, \reg4}
9999: ldreqt \reg1, [r0], #4
9998: ldreqt \reg2, [r0], #4
9997: ldreqt \reg3, [r0], #4
9996: ldreqt \reg4, [r0], #4
.section __ex_table, "a"
.long 9999b, 6001f
.long 9998b, 6001f
.long 9997b, 6001f
.long 9996b, 6001f
.previous
.endm
/*
* unsigned int
* csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *err_ptr)
* r0 = src, r1 = dst, r2 = len, r3 = sum, [sp] = *err_ptr
* Returns : r0 = checksum, [[sp, #0], #0] = 0 or -EFAULT
*/
#define FN_ENTRY ENTRY(csum_partial_copy_from_user)
#include "csumpartialcopygeneric.S"
/*
* FIXME: minor buglet here
* We don't return the checksum for the data present in the buffer. To do
* so properly, we would have to add in whatever registers were loaded before
* the fault, which, with the current asm above is not predictable.
*/
.align 4
6001: mov r4, #-EFAULT
ldr r5, [fp, #4] @ *err_ptr
str r4, [r5]
ldmia sp, {r1, r2} @ retrieve dst, len
add r2, r2, r1
mov r0, #0 @ zero the buffer
6002: teq r2, r1
strneb r0, [r1], #1
bne 6002b
load_regs ea

57
arch/arm26/lib/delay.S
View File

@ -1,57 +0,0 @@
/*
* linux/arch/arm26/lib/delay.S
*
* Copyright (C) 1995, 1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.text
LC0: .word loops_per_jiffy
/*
* 0 <= r0 <= 2000
*/
ENTRY(udelay)
mov r2, #0x6800
orr r2, r2, #0x00db
mul r1, r0, r2
ldr r2, LC0
ldr r2, [r2]
mov r1, r1, lsr #11
mov r2, r2, lsr #11
mul r0, r1, r2
movs r0, r0, lsr #6
RETINSTR(moveq,pc,lr)
/*
* loops = (r0 * 0x10c6 * 100 * loops_per_jiffy) / 2^32
*
* Oh, if only we had a cycle counter...
*/
@ Delay routine
ENTRY(__delay)
subs r0, r0, #1
#if 0
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
RETINSTR(movls,pc,lr)
subs r0, r0, #1
#endif
bhi __delay
RETINSTR(mov,pc,lr)

40
arch/arm26/lib/ecard.S
View File

@ -1,40 +0,0 @@
/*
* linux/arch/arm26/lib/ecard.S
*
* Copyright (C) 1995, 1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/hardware.h>
#define CPSR2SPSR(rt)
@ Purpose: call an expansion card loader to read bytes.
@ Proto : char read_loader(int offset, char *card_base, char *loader);
@ Returns: byte read
ENTRY(ecard_loader_read)
stmfd sp!, {r4 - r12, lr}
mov r11, r1
mov r1, r0
CPSR2SPSR(r0)
mov lr, pc
mov pc, r2
LOADREGS(fd, sp!, {r4 - r12, pc})
@ Purpose: call an expansion card loader to reset the card
@ Proto : void read_loader(int card_base, char *loader);
@ Returns: byte read
ENTRY(ecard_loader_reset)
stmfd sp!, {r4 - r12, lr}
mov r11, r0
CPSR2SPSR(r0)
mov lr, pc
add pc, r1, #8
LOADREGS(fd, sp!, {r4 - r12, pc})

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