73459f73e5
ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
282 lines
7.2 KiB
C
282 lines
7.2 KiB
C
/******************************************************************************
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*
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* Module Name: psutils - Parser miscellaneous utilities (Parser only)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acparser.h>
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#include <acpi/amlcode.h>
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psutils")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_create_scope_op
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*
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* PARAMETERS: None
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*
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* RETURN: A new Scope object, null on failure
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*
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* DESCRIPTION: Create a Scope and associated namepath op with the root name
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*
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******************************************************************************/
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union acpi_parse_object *
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acpi_ps_create_scope_op (
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void)
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{
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union acpi_parse_object *scope_op;
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scope_op = acpi_ps_alloc_op (AML_SCOPE_OP);
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if (!scope_op) {
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return (NULL);
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}
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scope_op->named.name = ACPI_ROOT_NAME;
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return (scope_op);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_init_op
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*
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* PARAMETERS: Op - A newly allocated Op object
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* Opcode - Opcode to store in the Op
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a parse (Op) object
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*
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******************************************************************************/
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void
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acpi_ps_init_op (
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union acpi_parse_object *op,
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u16 opcode)
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{
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ACPI_FUNCTION_ENTRY ();
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op->common.data_type = ACPI_DESC_TYPE_PARSER;
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op->common.aml_opcode = opcode;
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ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (op->common.aml_op_name,
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(acpi_ps_get_opcode_info (opcode))->name,
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sizeof (op->common.aml_op_name)));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_alloc_op
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*
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* PARAMETERS: Opcode - Opcode that will be stored in the new Op
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*
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* RETURN: Pointer to the new Op, null on failure
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*
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* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
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* opcode. A cache of opcodes is available for the pure
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* GENERIC_OP, since this is by far the most commonly used.
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*
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******************************************************************************/
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union acpi_parse_object*
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acpi_ps_alloc_op (
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u16 opcode)
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{
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union acpi_parse_object *op;
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const struct acpi_opcode_info *op_info;
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u8 flags = ACPI_PARSEOP_GENERIC;
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ACPI_FUNCTION_ENTRY ();
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op_info = acpi_ps_get_opcode_info (opcode);
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/* Determine type of parse_op required */
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if (op_info->flags & AML_DEFER) {
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flags = ACPI_PARSEOP_DEFERRED;
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}
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else if (op_info->flags & AML_NAMED) {
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flags = ACPI_PARSEOP_NAMED;
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}
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else if (opcode == AML_INT_BYTELIST_OP) {
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flags = ACPI_PARSEOP_BYTELIST;
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}
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/* Allocate the minimum required size object */
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if (flags == ACPI_PARSEOP_GENERIC) {
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/* The generic op (default) is by far the most common (16 to 1) */
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op = acpi_os_acquire_object (acpi_gbl_ps_node_cache);
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memset(op, 0, sizeof(struct acpi_parse_obj_common));
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}
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else {
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/* Extended parseop */
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op = acpi_os_acquire_object (acpi_gbl_ps_node_ext_cache);
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memset(op, 0, sizeof(struct acpi_parse_obj_named));
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}
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/* Initialize the Op */
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if (op) {
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acpi_ps_init_op (op, opcode);
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op->common.flags = flags;
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}
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return (op);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_free_op
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*
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* PARAMETERS: Op - Op to be freed
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*
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* RETURN: None.
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*
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* DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
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* or actually free it.
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*
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******************************************************************************/
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void
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acpi_ps_free_op (
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union acpi_parse_object *op)
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{
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ACPI_FUNCTION_NAME ("ps_free_op");
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if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", op));
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}
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if (op->common.flags & ACPI_PARSEOP_GENERIC) {
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acpi_os_release_object (acpi_gbl_ps_node_cache, op);
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}
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else {
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acpi_os_release_object (acpi_gbl_ps_node_ext_cache, op);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: Utility functions
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*
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* DESCRIPTION: Low level character and object functions
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*
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******************************************************************************/
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/*
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* Is "c" a namestring lead character?
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*/
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u8
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acpi_ps_is_leading_char (
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u32 c)
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{
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return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));
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}
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/*
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* Is "c" a namestring prefix character?
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*/
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u8
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acpi_ps_is_prefix_char (
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u32 c)
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{
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return ((u8) (c == '\\' || c == '^'));
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}
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/*
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* Get op's name (4-byte name segment) or 0 if unnamed
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*/
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#ifdef ACPI_FUTURE_USAGE
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u32
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acpi_ps_get_name (
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union acpi_parse_object *op)
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{
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/* The "generic" object has no name associated with it */
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if (op->common.flags & ACPI_PARSEOP_GENERIC) {
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return (0);
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}
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/* Only the "Extended" parse objects have a name */
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return (op->named.name);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*
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* Set op's name
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*/
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void
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acpi_ps_set_name (
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union acpi_parse_object *op,
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u32 name)
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{
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/* The "generic" object has no name associated with it */
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if (op->common.flags & ACPI_PARSEOP_GENERIC) {
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return;
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}
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op->named.name = name;
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}
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