388 lines
13 KiB
C
388 lines
13 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: pswalk - Parser routines to walk parsed op tree(s)
|
|
* $Revision: 51 $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999, 2000, 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.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
|
|
#include "acpi.h"
|
|
#include "amlcode.h"
|
|
#include "acparser.h"
|
|
#include "acdispat.h"
|
|
#include "acnamesp.h"
|
|
#include "acinterp.h"
|
|
|
|
#define _COMPONENT PARSER
|
|
MODULE_NAME ("pswalk")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextWalkOp
|
|
*
|
|
* PARAMETERS: WalkState - Current state of the walk
|
|
* Op - Current Op to be walked
|
|
* AscendingCallback - Procedure called when Op is complete
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get the next Op in a walk of the parse tree.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiPsGetNextWalkOp (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_PARSE_UPWARDS AscendingCallback)
|
|
{
|
|
ACPI_PARSE_OBJECT *Next;
|
|
ACPI_PARSE_OBJECT *Parent;
|
|
ACPI_PARSE_OBJECT *GrandParent;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
FUNCTION_TRACE_PTR ("PsGetNextWalkOp", Op);
|
|
|
|
|
|
/* Check for a argument only if we are descending in the tree */
|
|
|
|
if (WalkState->NextOpInfo != NEXT_OP_UPWARD)
|
|
{
|
|
/* Look for an argument or child of the current op */
|
|
|
|
Next = AcpiPsGetArg (Op, 0);
|
|
if (Next)
|
|
{
|
|
/* Still going downward in tree (Op is not completed yet) */
|
|
|
|
WalkState->PrevOp = Op;
|
|
WalkState->NextOp = Next;
|
|
WalkState->NextOpInfo = NEXT_OP_DOWNWARD;
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*
|
|
* No more children, this Op is complete. Save Next and Parent
|
|
* in case the Op object gets deleted by the callback routine
|
|
*/
|
|
|
|
Next = Op->Next;
|
|
Parent = Op->Parent;
|
|
|
|
Status = AscendingCallback (WalkState, Op);
|
|
|
|
/*
|
|
* If we are back to the starting point, the walk is complete.
|
|
*/
|
|
if (Op == WalkState->Origin)
|
|
{
|
|
/* Reached the point of origin, the walk is complete */
|
|
|
|
WalkState->PrevOp = Op;
|
|
WalkState->NextOp = NULL;
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Check for a sibling to the current op. A sibling means
|
|
* we are still going "downward" in the tree.
|
|
*/
|
|
|
|
if (Next)
|
|
{
|
|
/* There is a sibling, it will be next */
|
|
|
|
WalkState->PrevOp = Op;
|
|
WalkState->NextOp = Next;
|
|
WalkState->NextOpInfo = NEXT_OP_DOWNWARD;
|
|
|
|
/* Continue downward */
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*
|
|
* Drop into the loop below because we are moving upwards in
|
|
* the tree
|
|
*/
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* We are resuming a walk, and we were (are) going upward in the tree.
|
|
* So, we want to drop into the parent loop below.
|
|
*/
|
|
|
|
Parent = Op;
|
|
}
|
|
|
|
|
|
/*
|
|
* Look for a sibling of the current Op's parent
|
|
* Continue moving up the tree until we find a node that has not been
|
|
* visited, or we get back to where we started.
|
|
*/
|
|
while (Parent)
|
|
{
|
|
/* We are moving up the tree, therefore this parent Op is complete */
|
|
|
|
GrandParent = Parent->Parent;
|
|
Next = Parent->Next;
|
|
|
|
Status = AscendingCallback (WalkState, Parent);
|
|
|
|
/*
|
|
* If we are back to the starting point, the walk is complete.
|
|
*/
|
|
if (Parent == WalkState->Origin)
|
|
{
|
|
/* Reached the point of origin, the walk is complete */
|
|
|
|
WalkState->PrevOp = Parent;
|
|
WalkState->NextOp = NULL;
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* If there is a sibling to this parent (it is not the starting point
|
|
* Op), then we will visit it.
|
|
*/
|
|
if (Next)
|
|
{
|
|
/* found sibling of parent */
|
|
|
|
WalkState->PrevOp = Parent;
|
|
WalkState->NextOp = Next;
|
|
WalkState->NextOpInfo = NEXT_OP_DOWNWARD;
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* No siblings, no errors, just move up one more level in the tree */
|
|
|
|
Op = Parent;
|
|
Parent = GrandParent;
|
|
WalkState->PrevOp = Op;
|
|
}
|
|
|
|
|
|
/* Got all the way to the top of the tree, we must be done! */
|
|
/* However, the code should have terminated in the loop above */
|
|
|
|
WalkState->NextOp = NULL;
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsDeleteCompletedOp
|
|
*
|
|
* PARAMETERS: State - Walk state
|
|
* Op - Completed op
|
|
*
|
|
* RETURN: AE_OK
|
|
*
|
|
* DESCRIPTION: Callback function for AcpiPsGetNextWalkOp(). Used during
|
|
* AcpiPsDeleteParse tree to delete Op objects when all sub-objects
|
|
* have been visited (and deleted.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiPsDeleteCompletedOp (
|
|
ACPI_WALK_STATE *State,
|
|
ACPI_PARSE_OBJECT *Op)
|
|
{
|
|
|
|
AcpiPsFreeOp (Op);
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsDeleteParseTree
|
|
*
|
|
* PARAMETERS: SubtreeRoot - Root of tree (or subtree) to delete
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Delete a portion of or an entire parse tree.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiPsDeleteParseTree (
|
|
ACPI_PARSE_OBJECT *SubtreeRoot)
|
|
{
|
|
ACPI_WALK_STATE *WalkState;
|
|
ACPI_WALK_LIST WalkList;
|
|
|
|
|
|
FUNCTION_TRACE_PTR ("PsDeleteParseTree", SubtreeRoot);
|
|
|
|
|
|
if (!SubtreeRoot)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Create and initialize a new walk list */
|
|
|
|
WalkList.WalkState = NULL;
|
|
WalkState = AcpiDsCreateWalkState (TABLE_ID_DSDT, NULL, NULL, &WalkList);
|
|
if (!WalkState)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
WalkState->ParserState = NULL;
|
|
WalkState->ParseFlags = 0;
|
|
WalkState->DescendingCallback = NULL;
|
|
WalkState->AscendingCallback = NULL;
|
|
|
|
|
|
WalkState->Origin = SubtreeRoot;
|
|
WalkState->NextOp = SubtreeRoot;
|
|
|
|
|
|
/* Head downward in the tree */
|
|
|
|
WalkState->NextOpInfo = NEXT_OP_DOWNWARD;
|
|
|
|
/* Visit all nodes in the subtree */
|
|
|
|
while (WalkState->NextOp)
|
|
{
|
|
AcpiPsGetNextWalkOp (WalkState, WalkState->NextOp,
|
|
AcpiPsDeleteCompletedOp);
|
|
}
|
|
|
|
/* We are done with this walk */
|
|
|
|
AcpiDsDeleteWalkState (WalkState);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|