linux/drivers/acpi/parser/psutils.c
Robert Moore 0c9938cc75 [ACPI] ACPICA 20050729 from Bob Moore
Implemented support to ignore an attempt to install/load
a particular ACPI table more than once. Apparently there
exists BIOS code that repeatedly attempts to load the same
SSDT upon certain events. Thanks to Venkatesh Pallipadi.

Restructured the main interface to the AML parser in
order to correctly handle all exceptional conditions. This
will prevent leakage of the OwnerId resource and should
eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
machines. Thanks to Alexey Starikovskiy.

Support for "module level code" has been disabled in this
version due to a number of issues that have appeared
on various machines. The support can be enabled by
defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
compilation. When the issues are fully resolved, the code
will be enabled by default again.

Modified the internal functions for debug print support
to define the FunctionName parameter as a (const char *)
for compatibility with compiler built-in macros such as
__FUNCTION__, etc.

Linted the entire ACPICA source tree for both 32-bit
and 64-bit.

Signed-off-by: Robert Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-30 00:51:39 -04:00

282 lines
7.3 KiB
C

/******************************************************************************
*
* Module Name: psutils - Parser miscellaneous utilities (Parser only)
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acparser.h>
#include <acpi/amlcode.h>
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME ("psutils")
/*******************************************************************************
*
* FUNCTION: acpi_ps_create_scope_op
*
* PARAMETERS: None
*
* RETURN: A new Scope object, null on failure
*
* DESCRIPTION: Create a Scope and associated namepath op with the root name
*
******************************************************************************/
union acpi_parse_object *
acpi_ps_create_scope_op (
void)
{
union acpi_parse_object *scope_op;
scope_op = acpi_ps_alloc_op (AML_SCOPE_OP);
if (!scope_op) {
return (NULL);
}
scope_op->named.name = ACPI_ROOT_NAME;
return (scope_op);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_init_op
*
* PARAMETERS: Op - A newly allocated Op object
* Opcode - Opcode to store in the Op
*
* RETURN: None
*
* DESCRIPTION: Initialize a parse (Op) object
*
******************************************************************************/
void
acpi_ps_init_op (
union acpi_parse_object *op,
u16 opcode)
{
ACPI_FUNCTION_ENTRY ();
op->common.data_type = ACPI_DESC_TYPE_PARSER;
op->common.aml_opcode = opcode;
ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (op->common.aml_op_name,
(acpi_ps_get_opcode_info (opcode))->name,
sizeof (op->common.aml_op_name)));
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_alloc_op
*
* PARAMETERS: Opcode - Opcode that will be stored in the new Op
*
* RETURN: Pointer to the new Op, null on failure
*
* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
* opcode. A cache of opcodes is available for the pure
* GENERIC_OP, since this is by far the most commonly used.
*
******************************************************************************/
union acpi_parse_object*
acpi_ps_alloc_op (
u16 opcode)
{
union acpi_parse_object *op;
const struct acpi_opcode_info *op_info;
u8 flags = ACPI_PARSEOP_GENERIC;
ACPI_FUNCTION_ENTRY ();
op_info = acpi_ps_get_opcode_info (opcode);
/* Determine type of parse_op required */
if (op_info->flags & AML_DEFER) {
flags = ACPI_PARSEOP_DEFERRED;
}
else if (op_info->flags & AML_NAMED) {
flags = ACPI_PARSEOP_NAMED;
}
else if (opcode == AML_INT_BYTELIST_OP) {
flags = ACPI_PARSEOP_BYTELIST;
}
/* Allocate the minimum required size object */
if (flags == ACPI_PARSEOP_GENERIC) {
/* The generic op (default) is by far the most common (16 to 1) */
op = acpi_os_acquire_object (acpi_gbl_ps_node_cache);
memset(op, 0, sizeof(struct acpi_parse_obj_common));
}
else {
/* Extended parseop */
op = acpi_os_acquire_object (acpi_gbl_ps_node_ext_cache);
memset(op, 0, sizeof(struct acpi_parse_obj_named));
}
/* Initialize the Op */
if (op) {
acpi_ps_init_op (op, opcode);
op->common.flags = flags;
}
return (op);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_free_op
*
* PARAMETERS: Op - Op to be freed
*
* RETURN: None.
*
* DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
* or actually free it.
*
******************************************************************************/
void
acpi_ps_free_op (
union acpi_parse_object *op)
{
ACPI_FUNCTION_NAME ("ps_free_op");
if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", op));
}
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
(void) acpi_os_release_object (acpi_gbl_ps_node_cache, op);
}
else {
(void) acpi_os_release_object (acpi_gbl_ps_node_ext_cache, op);
}
}
/*******************************************************************************
*
* FUNCTION: Utility functions
*
* DESCRIPTION: Low level character and object functions
*
******************************************************************************/
/*
* Is "c" a namestring lead character?
*/
u8
acpi_ps_is_leading_char (
u32 c)
{
return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));
}
/*
* Is "c" a namestring prefix character?
*/
u8
acpi_ps_is_prefix_char (
u32 c)
{
return ((u8) (c == '\\' || c == '^'));
}
/*
* Get op's name (4-byte name segment) or 0 if unnamed
*/
#ifdef ACPI_FUTURE_USAGE
u32
acpi_ps_get_name (
union acpi_parse_object *op)
{
/* The "generic" object has no name associated with it */
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
return (0);
}
/* Only the "Extended" parse objects have a name */
return (op->named.name);
}
#endif /* ACPI_FUTURE_USAGE */
/*
* Set op's name
*/
void
acpi_ps_set_name (
union acpi_parse_object *op,
u32 name)
{
/* The "generic" object has no name associated with it */
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
return;
}
op->named.name = name;
}