forked from KolibriOS/kolibrios
919 lines
26 KiB
C
919 lines
26 KiB
C
/******************************************************************************
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*
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* Module Name: dswstate - Dispatcher parse tree walk management routines
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __DSWSTATE_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dswstate")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiDsResultStackPush (
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ACPI_WALK_STATE *WalkState);
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static ACPI_STATUS
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AcpiDsResultStackPop (
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ACPI_WALK_STATE *WalkState);
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsResultPop
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*
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* PARAMETERS: Object - Where to return the popped object
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* WalkState - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the top of this walk's result stack
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsResultPop (
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ACPI_OPERAND_OBJECT **Object,
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 Index;
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ACPI_GENERIC_STATE *State;
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ACPI_STATUS Status;
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ACPI_FUNCTION_NAME (DsResultPop);
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State = WalkState->Results;
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/* Incorrect state of result stack */
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if (State && !WalkState->ResultCount)
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{
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ACPI_ERROR ((AE_INFO, "No results on result stack"));
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return (AE_AML_INTERNAL);
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}
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if (!State && WalkState->ResultCount)
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{
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ACPI_ERROR ((AE_INFO, "No result state for result stack"));
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return (AE_AML_INTERNAL);
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}
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/* Empty result stack */
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if (!State)
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{
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ACPI_ERROR ((AE_INFO, "Result stack is empty! State=%p", WalkState));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Return object of the top element and clean that top element result stack */
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WalkState->ResultCount--;
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Index = (UINT32) WalkState->ResultCount % ACPI_RESULTS_FRAME_OBJ_NUM;
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*Object = State->Results.ObjDesc [Index];
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if (!*Object)
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{
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ACPI_ERROR ((AE_INFO, "No result objects on result stack, State=%p",
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WalkState));
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return (AE_AML_NO_RETURN_VALUE);
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}
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State->Results.ObjDesc [Index] = NULL;
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if (Index == 0)
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{
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Status = AcpiDsResultStackPop (WalkState);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj=%p [%s] Index=%X State=%p Num=%X\n", *Object,
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AcpiUtGetObjectTypeName (*Object),
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Index, WalkState, WalkState->ResultCount));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsResultPush
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*
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* PARAMETERS: Object - Where to return the popped object
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* WalkState - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the current result stack
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsResultPush (
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ACPI_OPERAND_OBJECT *Object,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_GENERIC_STATE *State;
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ACPI_STATUS Status;
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UINT32 Index;
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ACPI_FUNCTION_NAME (DsResultPush);
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if (WalkState->ResultCount > WalkState->ResultSize)
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{
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ACPI_ERROR ((AE_INFO, "Result stack is full"));
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return (AE_AML_INTERNAL);
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}
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else if (WalkState->ResultCount == WalkState->ResultSize)
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{
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/* Extend the result stack */
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Status = AcpiDsResultStackPush (WalkState);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Failed to extend the result stack"));
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return (Status);
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}
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}
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if (!(WalkState->ResultCount < WalkState->ResultSize))
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{
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ACPI_ERROR ((AE_INFO, "No free elements in result stack"));
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return (AE_AML_INTERNAL);
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}
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State = WalkState->Results;
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if (!State)
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{
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ACPI_ERROR ((AE_INFO, "No result stack frame during push"));
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return (AE_AML_INTERNAL);
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}
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if (!Object)
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{
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ACPI_ERROR ((AE_INFO,
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"Null Object! Obj=%p State=%p Num=%u",
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Object, WalkState, WalkState->ResultCount));
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return (AE_BAD_PARAMETER);
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}
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/* Assign the address of object to the top free element of result stack */
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Index = (UINT32) WalkState->ResultCount % ACPI_RESULTS_FRAME_OBJ_NUM;
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State->Results.ObjDesc [Index] = Object;
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WalkState->ResultCount++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
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Object, AcpiUtGetObjectTypeName ((ACPI_OPERAND_OBJECT *) Object),
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WalkState, WalkState->ResultCount, WalkState->CurrentResult));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsResultStackPush
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*
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* PARAMETERS: WalkState - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the WalkState result stack
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiDsResultStackPush (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_GENERIC_STATE *State;
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ACPI_FUNCTION_NAME (DsResultStackPush);
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/* Check for stack overflow */
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if (((UINT32) WalkState->ResultSize + ACPI_RESULTS_FRAME_OBJ_NUM) >
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ACPI_RESULTS_OBJ_NUM_MAX)
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{
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ACPI_ERROR ((AE_INFO, "Result stack overflow: State=%p Num=%u",
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WalkState, WalkState->ResultSize));
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return (AE_STACK_OVERFLOW);
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}
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State = AcpiUtCreateGenericState ();
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if (!State)
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{
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return (AE_NO_MEMORY);
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}
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State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RESULT;
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AcpiUtPushGenericState (&WalkState->Results, State);
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/* Increase the length of the result stack by the length of frame */
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WalkState->ResultSize += ACPI_RESULTS_FRAME_OBJ_NUM;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
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State, WalkState));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsResultStackPop
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*
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* PARAMETERS: WalkState - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off of the WalkState result stack
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiDsResultStackPop (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_GENERIC_STATE *State;
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ACPI_FUNCTION_NAME (DsResultStackPop);
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/* Check for stack underflow */
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if (WalkState->Results == NULL)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Result stack underflow - State=%p\n",
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WalkState));
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return (AE_AML_NO_OPERAND);
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}
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if (WalkState->ResultSize < ACPI_RESULTS_FRAME_OBJ_NUM)
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{
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ACPI_ERROR ((AE_INFO, "Insufficient result stack size"));
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return (AE_AML_INTERNAL);
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}
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State = AcpiUtPopGenericState (&WalkState->Results);
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AcpiUtDeleteGenericState (State);
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/* Decrease the length of result stack by the length of frame */
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WalkState->ResultSize -= ACPI_RESULTS_FRAME_OBJ_NUM;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Result=%p RemainingResults=%X State=%p\n",
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State, WalkState->ResultCount, WalkState));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsObjStackPush
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*
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* PARAMETERS: Object - Object to push
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* WalkState - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto this walk's object/operand stack
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsObjStackPush (
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void *Object,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_FUNCTION_NAME (DsObjStackPush);
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/* Check for stack overflow */
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if (WalkState->NumOperands >= ACPI_OBJ_NUM_OPERANDS)
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{
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ACPI_ERROR ((AE_INFO,
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"Object stack overflow! Obj=%p State=%p #Ops=%u",
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Object, WalkState, WalkState->NumOperands));
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return (AE_STACK_OVERFLOW);
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}
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/* Put the object onto the stack */
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WalkState->Operands [WalkState->OperandIndex] = Object;
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WalkState->NumOperands++;
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/* For the usual order of filling the operand stack */
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WalkState->OperandIndex++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
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Object, AcpiUtGetObjectTypeName ((ACPI_OPERAND_OBJECT *) Object),
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WalkState, WalkState->NumOperands));
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return (AE_OK);
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}
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|
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/*******************************************************************************
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*
|
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* FUNCTION: AcpiDsObjStackPop
|
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*
|
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* PARAMETERS: PopCount - Number of objects/entries to pop
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* WalkState - Current Walk state
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*
|
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* RETURN: Status
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*
|
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* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
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* deleted by this routine.
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*
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******************************************************************************/
|
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ACPI_STATUS
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AcpiDsObjStackPop (
|
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UINT32 PopCount,
|
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ACPI_WALK_STATE *WalkState)
|
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{
|
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UINT32 i;
|
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|
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ACPI_FUNCTION_NAME (DsObjStackPop);
|
|
|
|
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for (i = 0; i < PopCount; i++)
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{
|
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/* Check for stack underflow */
|
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|
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if (WalkState->NumOperands == 0)
|
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{
|
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ACPI_ERROR ((AE_INFO,
|
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"Object stack underflow! Count=%X State=%p #Ops=%u",
|
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PopCount, WalkState, WalkState->NumOperands));
|
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return (AE_STACK_UNDERFLOW);
|
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}
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|
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/* Just set the stack entry to null */
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|
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WalkState->NumOperands--;
|
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WalkState->Operands [WalkState->NumOperands] = NULL;
|
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}
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%u\n",
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PopCount, WalkState, WalkState->NumOperands));
|
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|
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return (AE_OK);
|
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}
|
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|
|
|
|
/*******************************************************************************
|
|
*
|
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* FUNCTION: AcpiDsObjStackPopAndDelete
|
|
*
|
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* PARAMETERS: PopCount - Number of objects/entries to pop
|
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* WalkState - Current Walk state
|
|
*
|
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* RETURN: Status
|
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*
|
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* DESCRIPTION: Pop this walk's object stack and delete each object that is
|
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* popped off.
|
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*
|
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******************************************************************************/
|
|
|
|
void
|
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AcpiDsObjStackPopAndDelete (
|
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UINT32 PopCount,
|
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ACPI_WALK_STATE *WalkState)
|
|
{
|
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INT32 i;
|
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ACPI_OPERAND_OBJECT *ObjDesc;
|
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|
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|
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ACPI_FUNCTION_NAME (DsObjStackPopAndDelete);
|
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|
|
|
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if (PopCount == 0)
|
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{
|
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return;
|
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}
|
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|
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for (i = (INT32) PopCount - 1; i >= 0; i--)
|
|
{
|
|
if (WalkState->NumOperands == 0)
|
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{
|
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return;
|
|
}
|
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|
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/* Pop the stack and delete an object if present in this stack entry */
|
|
|
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WalkState->NumOperands--;
|
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ObjDesc = WalkState->Operands [i];
|
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if (ObjDesc)
|
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{
|
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AcpiUtRemoveReference (WalkState->Operands [i]);
|
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WalkState->Operands [i] = NULL;
|
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}
|
|
}
|
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
|
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PopCount, WalkState, WalkState->NumOperands));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsGetCurrentWalkState
|
|
*
|
|
* PARAMETERS: Thread - Get current active state for this Thread
|
|
*
|
|
* RETURN: Pointer to the current walk state
|
|
*
|
|
* DESCRIPTION: Get the walk state that is at the head of the list (the "current"
|
|
* walk state.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_WALK_STATE *
|
|
AcpiDsGetCurrentWalkState (
|
|
ACPI_THREAD_STATE *Thread)
|
|
{
|
|
ACPI_FUNCTION_NAME (DsGetCurrentWalkState);
|
|
|
|
|
|
if (!Thread)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Current WalkState %p\n",
|
|
Thread->WalkStateList));
|
|
|
|
return (Thread->WalkStateList);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsPushWalkState
|
|
*
|
|
* PARAMETERS: WalkState - State to push
|
|
* Thread - Thread state object
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Place the Thread state at the head of the state list
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsPushWalkState (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_THREAD_STATE *Thread)
|
|
{
|
|
ACPI_FUNCTION_TRACE (DsPushWalkState);
|
|
|
|
|
|
WalkState->Next = Thread->WalkStateList;
|
|
Thread->WalkStateList = WalkState;
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsPopWalkState
|
|
*
|
|
* PARAMETERS: Thread - Current thread state
|
|
*
|
|
* RETURN: A WalkState object popped from the thread's stack
|
|
*
|
|
* DESCRIPTION: Remove and return the walkstate object that is at the head of
|
|
* the walk stack for the given walk list. NULL indicates that
|
|
* the list is empty.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_WALK_STATE *
|
|
AcpiDsPopWalkState (
|
|
ACPI_THREAD_STATE *Thread)
|
|
{
|
|
ACPI_WALK_STATE *WalkState;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (DsPopWalkState);
|
|
|
|
|
|
WalkState = Thread->WalkStateList;
|
|
|
|
if (WalkState)
|
|
{
|
|
/* Next walk state becomes the current walk state */
|
|
|
|
Thread->WalkStateList = WalkState->Next;
|
|
|
|
/*
|
|
* Don't clear the NEXT field, this serves as an indicator
|
|
* that there is a parent WALK STATE
|
|
* Do Not: WalkState->Next = NULL;
|
|
*/
|
|
}
|
|
|
|
return_PTR (WalkState);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateWalkState
|
|
*
|
|
* PARAMETERS: OwnerId - ID for object creation
|
|
* Origin - Starting point for this walk
|
|
* MethodDesc - Method object
|
|
* Thread - Current thread state
|
|
*
|
|
* RETURN: Pointer to the new walk state.
|
|
*
|
|
* DESCRIPTION: Allocate and initialize a new walk state. The current walk
|
|
* state is set to this new state.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_WALK_STATE *
|
|
AcpiDsCreateWalkState (
|
|
ACPI_OWNER_ID OwnerId,
|
|
ACPI_PARSE_OBJECT *Origin,
|
|
ACPI_OPERAND_OBJECT *MethodDesc,
|
|
ACPI_THREAD_STATE *Thread)
|
|
{
|
|
ACPI_WALK_STATE *WalkState;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (DsCreateWalkState);
|
|
|
|
|
|
WalkState = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_WALK_STATE));
|
|
if (!WalkState)
|
|
{
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
WalkState->DescriptorType = ACPI_DESC_TYPE_WALK;
|
|
WalkState->MethodDesc = MethodDesc;
|
|
WalkState->OwnerId = OwnerId;
|
|
WalkState->Origin = Origin;
|
|
WalkState->Thread = Thread;
|
|
|
|
WalkState->ParserState.StartOp = Origin;
|
|
|
|
/* Init the method args/local */
|
|
|
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
|
|
AcpiDsMethodDataInit (WalkState);
|
|
#endif
|
|
|
|
/* Put the new state at the head of the walk list */
|
|
|
|
if (Thread)
|
|
{
|
|
AcpiDsPushWalkState (WalkState, Thread);
|
|
}
|
|
|
|
return_PTR (WalkState);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsInitAmlWalk
|
|
*
|
|
* PARAMETERS: WalkState - New state to be initialized
|
|
* Op - Current parse op
|
|
* MethodNode - Control method NS node, if any
|
|
* AmlStart - Start of AML
|
|
* AmlLength - Length of AML
|
|
* Info - Method info block (params, etc.)
|
|
* PassNumber - 1, 2, or 3
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsInitAmlWalk (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_NAMESPACE_NODE *MethodNode,
|
|
UINT8 *AmlStart,
|
|
UINT32 AmlLength,
|
|
ACPI_EVALUATE_INFO *Info,
|
|
UINT8 PassNumber)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_PARSE_STATE *ParserState = &WalkState->ParserState;
|
|
ACPI_PARSE_OBJECT *ExtraOp;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (DsInitAmlWalk);
|
|
|
|
|
|
WalkState->ParserState.Aml =
|
|
WalkState->ParserState.AmlStart = AmlStart;
|
|
WalkState->ParserState.AmlEnd =
|
|
WalkState->ParserState.PkgEnd = AmlStart + AmlLength;
|
|
|
|
/* The NextOp of the NextWalk will be the beginning of the method */
|
|
|
|
WalkState->NextOp = NULL;
|
|
WalkState->PassNumber = PassNumber;
|
|
|
|
if (Info)
|
|
{
|
|
WalkState->Params = Info->Parameters;
|
|
WalkState->CallerReturnDesc = &Info->ReturnObject;
|
|
}
|
|
|
|
Status = AcpiPsInitScope (&WalkState->ParserState, Op);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
if (MethodNode)
|
|
{
|
|
WalkState->ParserState.StartNode = MethodNode;
|
|
WalkState->WalkType = ACPI_WALK_METHOD;
|
|
WalkState->MethodNode = MethodNode;
|
|
WalkState->MethodDesc = AcpiNsGetAttachedObject (MethodNode);
|
|
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
Status = AcpiDsScopeStackPush (MethodNode, ACPI_TYPE_METHOD, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Init the method arguments */
|
|
|
|
Status = AcpiDsMethodDataInitArgs (WalkState->Params,
|
|
ACPI_METHOD_NUM_ARGS, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Setup the current scope.
|
|
* Find a Named Op that has a namespace node associated with it.
|
|
* search upwards from this Op. Current scope is the first
|
|
* Op with a namespace node.
|
|
*/
|
|
ExtraOp = ParserState->StartOp;
|
|
while (ExtraOp && !ExtraOp->Common.Node)
|
|
{
|
|
ExtraOp = ExtraOp->Common.Parent;
|
|
}
|
|
|
|
if (!ExtraOp)
|
|
{
|
|
ParserState->StartNode = NULL;
|
|
}
|
|
else
|
|
{
|
|
ParserState->StartNode = ExtraOp->Common.Node;
|
|
}
|
|
|
|
if (ParserState->StartNode)
|
|
{
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
Status = AcpiDsScopeStackPush (ParserState->StartNode,
|
|
ParserState->StartNode->Type, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
}
|
|
|
|
Status = AcpiDsInitCallbacks (WalkState, PassNumber);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsDeleteWalkState
|
|
*
|
|
* PARAMETERS: WalkState - State to delete
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete a walk state including all internal data structures
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsDeleteWalkState (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_GENERIC_STATE *State;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsDeleteWalkState, WalkState);
|
|
|
|
|
|
if (!WalkState)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (WalkState->DescriptorType != ACPI_DESC_TYPE_WALK)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "%p is not a valid walk state",
|
|
WalkState));
|
|
return;
|
|
}
|
|
|
|
/* There should not be any open scopes */
|
|
|
|
if (WalkState->ParserState.Scope)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "%p walk still has a scope list",
|
|
WalkState));
|
|
AcpiPsCleanupScope (&WalkState->ParserState);
|
|
}
|
|
|
|
/* Always must free any linked control states */
|
|
|
|
while (WalkState->ControlState)
|
|
{
|
|
State = WalkState->ControlState;
|
|
WalkState->ControlState = State->Common.Next;
|
|
|
|
AcpiUtDeleteGenericState (State);
|
|
}
|
|
|
|
/* Always must free any linked parse states */
|
|
|
|
while (WalkState->ScopeInfo)
|
|
{
|
|
State = WalkState->ScopeInfo;
|
|
WalkState->ScopeInfo = State->Common.Next;
|
|
|
|
AcpiUtDeleteGenericState (State);
|
|
}
|
|
|
|
/* Always must free any stacked result states */
|
|
|
|
while (WalkState->Results)
|
|
{
|
|
State = WalkState->Results;
|
|
WalkState->Results = State->Common.Next;
|
|
|
|
AcpiUtDeleteGenericState (State);
|
|
}
|
|
|
|
ACPI_FREE (WalkState);
|
|
return_VOID;
|
|
}
|
|
|
|
|