kernel-ark/drivers/acpi/parser/pstree.c
Bob Moore b8e4d89357 [ACPI] ACPICA 20060127
Implemented support in the Resource Manager to allow
unresolved namestring references within resource package
objects for the _PRT method. This support is in addition
to the previously implemented unresolved reference
support within the AML parser. If the interpreter slack
mode is enabled (true on Linux unless acpi=strict),
these unresolved references will be passed through
to the caller as a NULL package entry.
http://bugzilla.kernel.org/show_bug.cgi?id=5741

Implemented and deployed new macros and functions for
error and warning messages across the subsystem. These
macros are simpler and generate less code than their
predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_*
macros.

Implemented the acpi_cpu_flags type to simplify host OS
integration of the Acquire/Release Lock OSL interfaces.
Suggested by Steven Rostedt and Andrew Morton.

Fixed a problem where Alias ASL operators are sometimes
not correctly resolved. causing AE_AML_INTERNAL
http://bugzilla.kernel.org/show_bug.cgi?id=5189
http://bugzilla.kernel.org/show_bug.cgi?id=5674

Fixed several problems with the implementation of the
ConcatenateResTemplate ASL operator. As per the ACPI
specification, zero length buffers are now treated as a
single EndTag. One-length buffers always cause a fatal
exception. Non-zero length buffers that do not end with
a full 2-byte EndTag cause a fatal exception.

Fixed a possible structure overwrite in the
AcpiGetObjectInfo external interface. (With assistance
from Thomas Renninger)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-01-31 03:25:09 -05:00

304 lines
7.7 KiB
C

/******************************************************************************
*
* Module Name: pstree - Parser op tree manipulation/traversal/search
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, 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("pstree")
/* Local prototypes */
#ifdef ACPI_OBSOLETE_FUNCTIONS
union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op);
#endif
/*******************************************************************************
*
* FUNCTION: acpi_ps_get_arg
*
* PARAMETERS: Op - Get an argument for this op
* Argn - Nth argument to get
*
* RETURN: The argument (as an Op object). NULL if argument does not exist
*
* DESCRIPTION: Get the specified op's argument.
*
******************************************************************************/
union acpi_parse_object *acpi_ps_get_arg(union acpi_parse_object *op, u32 argn)
{
union acpi_parse_object *arg = NULL;
const struct acpi_opcode_info *op_info;
ACPI_FUNCTION_ENTRY();
/* Get the info structure for this opcode */
op_info = acpi_ps_get_opcode_info(op->common.aml_opcode);
if (op_info->class == AML_CLASS_UNKNOWN) {
/* Invalid opcode or ASCII character */
return (NULL);
}
/* Check if this opcode requires argument sub-objects */
if (!(op_info->flags & AML_HAS_ARGS)) {
/* Has no linked argument objects */
return (NULL);
}
/* Get the requested argument object */
arg = op->common.value.arg;
while (arg && argn) {
argn--;
arg = arg->common.next;
}
return (arg);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_append_arg
*
* PARAMETERS: Op - Append an argument to this Op.
* Arg - Argument Op to append
*
* RETURN: None.
*
* DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)
*
******************************************************************************/
void
acpi_ps_append_arg(union acpi_parse_object *op, union acpi_parse_object *arg)
{
union acpi_parse_object *prev_arg;
const struct acpi_opcode_info *op_info;
ACPI_FUNCTION_ENTRY();
if (!op) {
return;
}
/* Get the info structure for this opcode */
op_info = acpi_ps_get_opcode_info(op->common.aml_opcode);
if (op_info->class == AML_CLASS_UNKNOWN) {
/* Invalid opcode */
ACPI_ERROR((AE_INFO, "Invalid AML Opcode: 0x%2.2X",
op->common.aml_opcode));
return;
}
/* Check if this opcode requires argument sub-objects */
if (!(op_info->flags & AML_HAS_ARGS)) {
/* Has no linked argument objects */
return;
}
/* Append the argument to the linked argument list */
if (op->common.value.arg) {
/* Append to existing argument list */
prev_arg = op->common.value.arg;
while (prev_arg->common.next) {
prev_arg = prev_arg->common.next;
}
prev_arg->common.next = arg;
} else {
/* No argument list, this will be the first argument */
op->common.value.arg = arg;
}
/* Set the parent in this arg and any args linked after it */
while (arg) {
arg->common.parent = op;
arg = arg->common.next;
}
}
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_ps_get_depth_next
*
* PARAMETERS: Origin - Root of subtree to search
* Op - Last (previous) Op that was found
*
* RETURN: Next Op found in the search.
*
* DESCRIPTION: Get next op in tree (walking the tree in depth-first order)
* Return NULL when reaching "origin" or when walking up from root
*
******************************************************************************/
union acpi_parse_object *acpi_ps_get_depth_next(union acpi_parse_object *origin,
union acpi_parse_object *op)
{
union acpi_parse_object *next = NULL;
union acpi_parse_object *parent;
union acpi_parse_object *arg;
ACPI_FUNCTION_ENTRY();
if (!op) {
return (NULL);
}
/* Look for an argument or child */
next = acpi_ps_get_arg(op, 0);
if (next) {
return (next);
}
/* Look for a sibling */
next = op->common.next;
if (next) {
return (next);
}
/* Look for a sibling of parent */
parent = op->common.parent;
while (parent) {
arg = acpi_ps_get_arg(parent, 0);
while (arg && (arg != origin) && (arg != op)) {
arg = arg->common.next;
}
if (arg == origin) {
/* Reached parent of origin, end search */
return (NULL);
}
if (parent->common.next) {
/* Found sibling of parent */
return (parent->common.next);
}
op = parent;
parent = parent->common.parent;
}
return (next);
}
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: acpi_ps_get_child
*
* PARAMETERS: Op - Get the child of this Op
*
* RETURN: Child Op, Null if none is found.
*
* DESCRIPTION: Get op's children or NULL if none
*
******************************************************************************/
union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op)
{
union acpi_parse_object *child = NULL;
ACPI_FUNCTION_ENTRY();
switch (op->common.aml_opcode) {
case AML_SCOPE_OP:
case AML_ELSE_OP:
case AML_DEVICE_OP:
case AML_THERMAL_ZONE_OP:
case AML_INT_METHODCALL_OP:
child = acpi_ps_get_arg(op, 0);
break;
case AML_BUFFER_OP:
case AML_PACKAGE_OP:
case AML_METHOD_OP:
case AML_IF_OP:
case AML_WHILE_OP:
case AML_FIELD_OP:
child = acpi_ps_get_arg(op, 1);
break;
case AML_POWER_RES_OP:
case AML_INDEX_FIELD_OP:
child = acpi_ps_get_arg(op, 2);
break;
case AML_PROCESSOR_OP:
case AML_BANK_FIELD_OP:
child = acpi_ps_get_arg(op, 3);
break;
default:
/* All others have no children */
break;
}
return (child);
}
#endif
#endif /* ACPI_FUTURE_USAGE */