linux/drivers/acpi/acpica/pstree.c
Bob Moore a8357b0c95 ACPICA: Update all ACPICA copyrights and signons to 2010
Add 2010 copyright to all module headers and signons, including
the Linux header. This affects virtually every file in the ACPICA
core subsystem, iASL compiler, and all utilities.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-01-22 12:30:05 -05:00

313 lines
7.7 KiB
C

/******************************************************************************
*
* Module Name: pstree - Parser op tree manipulation/traversal/search
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2010, Intel Corp.
* 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 "accommon.h"
#include "acparser.h"
#include "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;
op->common.arg_list_length++;
}
}
#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 */