NetBSD-5.0.2/sys/dist/acpica/pstree.c
/******************************************************************************
*
* Module Name: pstree - Parser op tree manipulation/traversal/search
* $Revision: 1.4 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __PSTREE_C__
#include "acpi.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME ("pstree")
/* Local prototypes */
#ifdef ACPI_OBSOLETE_FUNCTIONS
ACPI_PARSE_OBJECT *
AcpiPsGetChild (
ACPI_PARSE_OBJECT *op);
#endif
/*******************************************************************************
*
* FUNCTION: AcpiPsGetArg
*
* 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.
*
******************************************************************************/
ACPI_PARSE_OBJECT *
AcpiPsGetArg (
ACPI_PARSE_OBJECT *Op,
UINT32 Argn)
{
ACPI_PARSE_OBJECT *Arg = NULL;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_FUNCTION_ENTRY ();
/* Get the info structure for this opcode */
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (OpInfo->Class == AML_CLASS_UNKNOWN)
{
/* Invalid opcode or ASCII character */
return (NULL);
}
/* Check if this opcode requires argument sub-objects */
if (!(OpInfo->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: AcpiPsAppendArg
*
* 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
AcpiPsAppendArg (
ACPI_PARSE_OBJECT *Op,
ACPI_PARSE_OBJECT *Arg)
{
ACPI_PARSE_OBJECT *PrevArg;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_FUNCTION_ENTRY ();
if (!Op)
{
return;
}
/* Get the info structure for this opcode */
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (OpInfo->Class == AML_CLASS_UNKNOWN)
{
/* Invalid opcode */
ACPI_ERROR ((AE_INFO, "Invalid AML Opcode: 0x%2.2X",
Op->Common.AmlOpcode));
return;
}
/* Check if this opcode requires argument sub-objects */
if (!(OpInfo->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 */
PrevArg = Op->Common.Value.Arg;
while (PrevArg->Common.Next)
{
PrevArg = PrevArg->Common.Next;
}
PrevArg->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.ArgListLength++;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiPsGetDepthNext
*
* 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
*
******************************************************************************/
ACPI_PARSE_OBJECT *
AcpiPsGetDepthNext (
ACPI_PARSE_OBJECT *Origin,
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Next = NULL;
ACPI_PARSE_OBJECT *Parent;
ACPI_PARSE_OBJECT *Arg;
ACPI_FUNCTION_ENTRY ();
if (!Op)
{
return (NULL);
}
/* Look for an argument or child */
Next = AcpiPsGetArg (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 = AcpiPsGetArg (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: AcpiPsGetChild
*
* 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
*
******************************************************************************/
ACPI_PARSE_OBJECT *
AcpiPsGetChild (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Child = NULL;
ACPI_FUNCTION_ENTRY ();
switch (Op->Common.AmlOpcode)
{
case AML_SCOPE_OP:
case AML_ELSE_OP:
case AML_DEVICE_OP:
case AML_THERMAL_ZONE_OP:
case AML_INT_METHODCALL_OP:
Child = AcpiPsGetArg (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 = AcpiPsGetArg (Op, 1);
break;
case AML_POWER_RES_OP:
case AML_INDEX_FIELD_OP:
Child = AcpiPsGetArg (Op, 2);
break;
case AML_PROCESSOR_OP:
case AML_BANK_FIELD_OP:
Child = AcpiPsGetArg (Op, 3);
break;
default:
/* All others have no children */
break;
}
return (Child);
}
#endif