Commit Graph

21 Commits

Author SHA1 Message Date
Ralf Baechle
7b0fdaa6a1 [MIPS] Provide empty irq_enable_hazard definition for legacy and R1 cores.
Following a strict interpretation the empty definition of irq_enable_hazard
has always been a bug - but an intentional one because it didn't bite.
This has now changed, for uniprocessor kernels mm/slab.c:do_drain()

[...]
        on_each_cpu(do_drain, cachep, 1, 1);
        check_irq_on();
[...]

may be compiled into a mtc0 c0_status; mfc0 c0_status sequence resulting
in a back-to-back hazard.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-09-10 21:25:28 +01:00
Ralf Baechle
98de920a2a [MIPS] Add missing declaration for mips_ihb().
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-31 21:35:26 +01:00
Ralf Baechle
a1b53a7b22 [MIPS] SB1: Build fix.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:31 +01:00
Chris Dearman
0b6249567b [MIPS] FPU hazard handling
Move FPU hazard handling to hazards.h and provide proper support for
MIPSR2 processors

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:31 +01:00
Ralf Baechle
7605b39061 [MIPS] Fix pipeline hazard.
In the the sequence:
        ei
        ..
        mfc0    $x, $status

the mfc0 may not see the SR_IE bit set. This was a deliberate bug in the
kernel code because we knew this was a safe thing to do on all R2 silicon
so far but new silicon is changing this.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24 17:01:49 +00:00
Yoichi Yuasa
3f3183709f [MIPS] vr41xx: need one more nop with mtc0_tlbw_hazard()
NEC VR4111 and VR4121 need one more nop with mtc0_tlbw_hazard().

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-01-24 19:23:21 +00:00
Ralf Baechle
36396f3c36 [MIPS] s/__ASSEMBLER__/__ASSEMBLY__/ for clarity sake.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-09-27 13:37:57 +01:00
Ralf Baechle
d7d86aa88a [MIPS] Cleanup hazard handling.
Mostly based on patch by Chris Dearman and cleanups from Yoichi.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-09-27 13:37:53 +01:00
Ralf Baechle
8db089c6b5 [MIPS] Add missing backslashes to macro definitions.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-29 21:10:55 +01:00
David Woodhouse
62c4f0a2d5 Don't include linux/config.h from anywhere else in include/
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-04-26 12:56:16 +01:00
Ralf Baechle
41c594ab65 [MIPS] MT: Improved multithreading support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-19 04:14:28 +02:00
Ralf Baechle
a3c4946db4 [MIPS] SB1: Fix interrupt disable hazard.
The SB1 core has a three cycle interrupt disable hazard but we were
wrongly treating it as fully interlocked.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-03-18 16:59:26 +00:00
Ralf Baechle
05faa7b758 [MIPS] Fix C version of ssnop to use the right opcode.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-02-07 13:30:21 +00:00
Ralf Baechle
7043ad4f4c MIPS: R2: Try to bulletproof instruction_hazard against miss-compilation.
Gcc has a tradition of misscompiling the previous construct using the
address of a label as argument to inline assembler.  Gas otoh has the
annoying difference between la and dla which are only usable for 32-bit
rsp. 64-bit code, so can't be used without conditional compilation.
The alterantive is switching the assembler to 64-bit code which happens
to work right even for 32-bit code ...
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10 13:39:08 +00:00
Ralf Baechle
ec917c2c1a Fixup a few lose ends in explicit support for MIPS R1/R2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:37 +01:00
Ralf Baechle
f5cfa980e5 Use R4000 TLB routines for SB1 also.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:31 +01:00
Ralf Baechle
86071b637d Cleanups.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:53 +01:00
Ralf Baechle
cc61c1fede MIPS R2 instruction hazard handling.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:46 +01:00
Ralf Baechle
88d535b6b5 One definition of back_to_back_c0_hazard too much.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:30:50 +01:00
Ralf Baechle
5068debff2 New hazard handling function back_to_back_c0_hazard() to handle back to
back mtc0 / mfc0 pairs from the same coprocessor register.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:30:49 +01:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00