826 lines
26 KiB
C
826 lines
26 KiB
C
/******************************************************************************
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*
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* Module Name: dsmethod - Parser/Interpreter interface - control method parsing
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* xRevision: 1.116 $
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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 - 2006, 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
|
|
* 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
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dsmethod.c,v 1.3 2006/04/13 07:31:29 kochi Exp $");
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#define __DSMETHOD_C__
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#include "acpi.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acdisasm.h"
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|
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsmethod")
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|
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodError
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*
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* PARAMETERS: Status - Execution status
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Called on method error. Invoke the global exception handler if
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* present, dump the method data if the disassembler is configured
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*
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* Note: Allows the exception handler to change the status code
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*
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******************************************************************************/
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ACPI_STATUS
|
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AcpiDsMethodError (
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ACPI_STATUS Status,
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|
ACPI_WALK_STATE *WalkState)
|
|
{
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|
ACPI_FUNCTION_ENTRY ();
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|
|
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|
/* Ignore AE_OK and control exception codes */
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|
|
if (ACPI_SUCCESS (Status) ||
|
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(Status & AE_CODE_CONTROL))
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|
{
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|
return (Status);
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|
}
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/* Invoke the global exception handler */
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if (AcpiGbl_ExceptionHandler)
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{
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/* Exit the interpreter, allow handler to execute methods */
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AcpiExExitInterpreter ();
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|
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/*
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|
* Handler can map the exception code to anything it wants, including
|
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* AE_OK, in which case the executing method will not be aborted.
|
|
*/
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Status = AcpiGbl_ExceptionHandler (Status,
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|
WalkState->MethodNode ?
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WalkState->MethodNode->Name.Integer : 0,
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WalkState->Opcode, WalkState->AmlOffset, NULL);
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(void) AcpiExEnterInterpreter ();
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}
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#ifdef ACPI_DISASSEMBLER
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if (ACPI_FAILURE (Status))
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{
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|
/* Display method locals/args if disassembler is present */
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|
|
AcpiDmDumpMethodInfo (Status, WalkState, WalkState->Op);
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}
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#endif
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return (Status);
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|
}
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|
|
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|
/*******************************************************************************
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*
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* FUNCTION: AcpiDsBeginMethodExecution
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|
*
|
|
* PARAMETERS: MethodNode - Node of the method
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* ObjDesc - The method object
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* CallingMethodNode - Caller of this method (if non-null)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Prepare a method for execution. Parses the method if necessary,
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* increments the thread count, and waits at the method semaphore
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* for clearance to execute.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsBeginMethodExecution (
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ACPI_NAMESPACE_NODE *MethodNode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_NAMESPACE_NODE *CallingMethodNode)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR ("DsBeginMethodExecution", MethodNode);
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|
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if (!MethodNode)
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{
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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|
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/* Prevent wraparound of thread count */
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if (ObjDesc->Method.ThreadCount == ACPI_UINT8_MAX)
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{
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ACPI_ERROR ((AE_INFO,
|
|
"Method reached maximum reentrancy limit (255)"));
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return_ACPI_STATUS (AE_AML_METHOD_LIMIT);
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|
}
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|
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/*
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* If there is a concurrency limit on this method, we need to
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* obtain a unit from the method semaphore.
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*/
|
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if (ObjDesc->Method.Semaphore)
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{
|
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/*
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|
* Allow recursive method calls, up to the reentrancy/concurrency
|
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* limit imposed by the SERIALIZED rule and the SyncLevel method
|
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* parameter.
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*
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|
* The point of this code is to avoid permanently blocking a
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* thread that is making recursive method calls.
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*/
|
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if (MethodNode == CallingMethodNode)
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{
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if (ObjDesc->Method.ThreadCount >= ObjDesc->Method.Concurrency)
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{
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return_ACPI_STATUS (AE_AML_METHOD_LIMIT);
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}
|
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}
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|
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/*
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* Get a unit from the method semaphore. This releases the
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* interpreter if we block
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*/
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Status = AcpiExSystemWaitSemaphore (ObjDesc->Method.Semaphore,
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ACPI_WAIT_FOREVER);
|
|
}
|
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|
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/*
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|
* Allocate an Owner ID for this method, only if this is the first thread
|
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* to begin concurrent execution. We only need one OwnerId, even if the
|
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* method is invoked recursively.
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*/
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if (!ObjDesc->Method.OwnerId)
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{
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Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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|
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/*
|
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* Increment the method parse tree thread count since it has been
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* reentered one more time (even if it is the same thread)
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*/
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ObjDesc->Method.ThreadCount++;
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return_ACPI_STATUS (Status);
|
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}
|
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|
|
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|
/*******************************************************************************
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*
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* FUNCTION: AcpiDsCallControlMethod
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*
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* PARAMETERS: Thread - Info for this thread
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* ThisWalkState - Current walk state
|
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* Op - Current Op to be walked
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*
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* RETURN: Status
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*
|
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* DESCRIPTION: Transfer execution to a called control method
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*
|
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******************************************************************************/
|
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|
ACPI_STATUS
|
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AcpiDsCallControlMethod (
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ACPI_THREAD_STATE *Thread,
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ACPI_WALK_STATE *ThisWalkState,
|
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ACPI_PARSE_OBJECT *Op)
|
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{
|
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ACPI_STATUS Status;
|
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ACPI_NAMESPACE_NODE *MethodNode;
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ACPI_WALK_STATE *NextWalkState = NULL;
|
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ACPI_OPERAND_OBJECT *ObjDesc;
|
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ACPI_PARAMETER_INFO Info;
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("DsCallControlMethod", ThisWalkState);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n",
|
|
ThisWalkState->PrevOp, ThisWalkState));
|
|
|
|
/*
|
|
* Get the namespace entry for the control method we are about to call
|
|
*/
|
|
MethodNode = ThisWalkState->MethodCallNode;
|
|
if (!MethodNode)
|
|
{
|
|
return_ACPI_STATUS (AE_NULL_ENTRY);
|
|
}
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (MethodNode);
|
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if (!ObjDesc)
|
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{
|
|
return_ACPI_STATUS (AE_NULL_OBJECT);
|
|
}
|
|
|
|
/* Init for new method, wait on concurrency semaphore */
|
|
|
|
Status = AcpiDsBeginMethodExecution (MethodNode, ObjDesc,
|
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ThisWalkState->MethodNode);
|
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if (ACPI_FAILURE (Status))
|
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{
|
|
goto Cleanup;
|
|
}
|
|
|
|
if (!(ObjDesc->Method.MethodFlags & AML_METHOD_INTERNAL_ONLY))
|
|
{
|
|
/* 1) Parse: Create a new walk state for the preempting walk */
|
|
|
|
NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwnerId,
|
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Op, ObjDesc, NULL);
|
|
if (!NextWalkState)
|
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{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Create and init a Root Node */
|
|
|
|
Op = AcpiPsCreateScopeOp ();
|
|
if (!Op)
|
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{
|
|
Status = AE_NO_MEMORY;
|
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goto Cleanup;
|
|
}
|
|
|
|
Status = AcpiDsInitAmlWalk (NextWalkState, Op, MethodNode,
|
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ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength,
|
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NULL, 1);
|
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if (ACPI_FAILURE (Status))
|
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{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Begin AML parse */
|
|
|
|
Status = AcpiPsParseAml (NextWalkState);
|
|
AcpiPsDeleteParseTree (Op);
|
|
}
|
|
|
|
/* 2) Execute: Create a new state for the preempting walk */
|
|
|
|
NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwnerId,
|
|
NULL, ObjDesc, Thread);
|
|
if (!NextWalkState)
|
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{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
/*
|
|
* The resolved arguments were put on the previous walk state's operand
|
|
* stack. Operands on the previous walk state stack always
|
|
* start at index 0. Also, null terminate the list of arguments
|
|
*/
|
|
ThisWalkState->Operands [ThisWalkState->NumOperands] = NULL;
|
|
|
|
Info.Parameters = &ThisWalkState->Operands[0];
|
|
Info.ParameterType = ACPI_PARAM_ARGS;
|
|
|
|
Status = AcpiDsInitAmlWalk (NextWalkState, NULL, MethodNode,
|
|
ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength,
|
|
&Info, 3);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* Delete the operands on the previous walkstate operand stack
|
|
* (they were copied to new objects)
|
|
*/
|
|
for (i = 0; i < ObjDesc->Method.ParamCount; i++)
|
|
{
|
|
AcpiUtRemoveReference (ThisWalkState->Operands [i]);
|
|
ThisWalkState->Operands [i] = NULL;
|
|
}
|
|
|
|
/* Clear the operand stack */
|
|
|
|
ThisWalkState->NumOperands = 0;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Starting nested execution, newstate=%p\n", NextWalkState));
|
|
|
|
if (ObjDesc->Method.MethodFlags & AML_METHOD_INTERNAL_ONLY)
|
|
{
|
|
Status = ObjDesc->Method.Implementation (NextWalkState);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
|
|
|
|
Cleanup:
|
|
/* Decrement the thread count on the method parse tree */
|
|
|
|
if (NextWalkState && (NextWalkState->MethodDesc))
|
|
{
|
|
NextWalkState->MethodDesc->Method.ThreadCount--;
|
|
}
|
|
|
|
/* On error, we must delete the new walk state */
|
|
|
|
AcpiDsTerminateControlMethod (NextWalkState);
|
|
AcpiDsDeleteWalkState (NextWalkState);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsRestartControlMethod
|
|
*
|
|
* PARAMETERS: WalkState - State for preempted method (caller)
|
|
* ReturnDesc - Return value from the called method
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Restart a method that was preempted by another (nested) method
|
|
* invocation. Handle the return value (if any) from the callee.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsRestartControlMethod (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_OPERAND_OBJECT *ReturnDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("DsRestartControlMethod", WalkState);
|
|
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n",
|
|
(char *) &WalkState->MethodNode->Name, WalkState->MethodCallOp,
|
|
ReturnDesc));
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
" ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n",
|
|
WalkState->ReturnUsed,
|
|
WalkState->Results, WalkState));
|
|
|
|
/* Did the called method return a value? */
|
|
|
|
if (ReturnDesc)
|
|
{
|
|
/* Are we actually going to use the return value? */
|
|
|
|
if (WalkState->ReturnUsed)
|
|
{
|
|
/* Save the return value from the previous method */
|
|
|
|
Status = AcpiDsResultPush (ReturnDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiUtRemoveReference (ReturnDesc);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Save as THIS method's return value in case it is returned
|
|
* immediately to yet another method
|
|
*/
|
|
WalkState->ReturnDesc = ReturnDesc;
|
|
}
|
|
|
|
/*
|
|
* The following code is the
|
|
* optional support for a so-called "implicit return". Some AML code
|
|
* assumes that the last value of the method is "implicitly" returned
|
|
* to the caller. Just save the last result as the return value.
|
|
* NOTE: this is optional because the ASL language does not actually
|
|
* support this behavior.
|
|
*/
|
|
else if (!AcpiDsDoImplicitReturn (ReturnDesc, WalkState, FALSE))
|
|
{
|
|
/*
|
|
* Delete the return value if it will not be used by the
|
|
* calling method
|
|
*/
|
|
AcpiUtRemoveReference (ReturnDesc);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsTerminateControlMethod
|
|
*
|
|
* PARAMETERS: WalkState - State of the method
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Terminate a control method. Delete everything that the method
|
|
* created, delete all locals and arguments, and delete the parse
|
|
* tree if requested.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsTerminateControlMethod (
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_NAMESPACE_NODE *MethodNode;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("DsTerminateControlMethod", WalkState);
|
|
|
|
|
|
if (!WalkState)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* The current method object was saved in the walk state */
|
|
|
|
ObjDesc = WalkState->MethodDesc;
|
|
if (!ObjDesc)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Delete all arguments and locals */
|
|
|
|
AcpiDsMethodDataDeleteAll (WalkState);
|
|
|
|
/*
|
|
* Lock the parser while we terminate this method.
|
|
* If this is the last thread executing the method,
|
|
* we have additional cleanup to perform
|
|
*/
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_PARSER);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Signal completion of the execution of this method if necessary */
|
|
|
|
if (WalkState->MethodDesc->Method.Semaphore)
|
|
{
|
|
Status = AcpiOsSignalSemaphore (
|
|
WalkState->MethodDesc->Method.Semaphore, 1);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Could not signal method semaphore"));
|
|
|
|
/* Ignore error and continue cleanup */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* There are no more threads executing this method. Perform
|
|
* additional cleanup.
|
|
*
|
|
* The method Node is stored in the walk state
|
|
*/
|
|
MethodNode = WalkState->MethodNode;
|
|
|
|
/* Lock namespace for possible update */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/*
|
|
* Delete any namespace entries created immediately underneath
|
|
* the method
|
|
*/
|
|
if (MethodNode->Child)
|
|
{
|
|
AcpiNsDeleteNamespaceSubtree (MethodNode);
|
|
}
|
|
|
|
/*
|
|
* Delete any namespace entries created anywhere else within
|
|
* the namespace by the execution of this method
|
|
*/
|
|
AcpiNsDeleteNamespaceByOwner (WalkState->MethodDesc->Method.OwnerId);
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* Are there any other threads currently executing this method? */
|
|
|
|
if (WalkState->MethodDesc->Method.ThreadCount)
|
|
{
|
|
/*
|
|
* Additional threads. Do not release the OwnerId in this case,
|
|
* we immediately reuse it for the next thread executing this method
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"*** Completed execution of one thread, %d threads remaining\n",
|
|
WalkState->MethodDesc->Method.ThreadCount));
|
|
}
|
|
else
|
|
{
|
|
/* This is the only executing thread for this method */
|
|
|
|
/*
|
|
* Support to dynamically change a method from NotSerialized to
|
|
* Serialized if it appears that the method is incorrectly written and
|
|
* does not support multiple thread execution. The best example of this
|
|
* is if such a method creates namespace objects and blocks. A second
|
|
* thread will fail with an AE_ALREADY_EXISTS exception
|
|
*
|
|
* This code is here because we must wait until the last thread exits
|
|
* before creating the synchronization semaphore.
|
|
*/
|
|
if ((WalkState->MethodDesc->Method.Concurrency == 1) &&
|
|
(!WalkState->MethodDesc->Method.Semaphore))
|
|
{
|
|
Status = AcpiOsCreateSemaphore (1, 1,
|
|
&WalkState->MethodDesc->Method.Semaphore);
|
|
}
|
|
|
|
/* No more threads, we can free the OwnerId */
|
|
|
|
AcpiUtReleaseOwnerId (&WalkState->MethodDesc->Method.OwnerId);
|
|
}
|
|
|
|
Exit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_PARSER);
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
#ifdef ACPI_INIT_PARSE_METHODS
|
|
/*
|
|
* Note 11/2005: Removed this code to parse all methods during table
|
|
* load because it causes problems if there are any errors during the
|
|
* parse. Also, it seems like overkill and we probably don't want to
|
|
* abort a table load because of an issue with a single method.
|
|
*/
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsParseMethod
|
|
*
|
|
* PARAMETERS: Node - Method node
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Parse the AML that is associated with the method.
|
|
*
|
|
* MUTEX: Assumes parser is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsParseMethod (
|
|
ACPI_NAMESPACE_NODE *Node)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_PARSE_OBJECT *Op;
|
|
ACPI_WALK_STATE *WalkState;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("DsParseMethod", Node);
|
|
|
|
|
|
/* Parameter Validation */
|
|
|
|
if (!Node)
|
|
{
|
|
return_ACPI_STATUS (AE_NULL_ENTRY);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** NamedObj=%p\n",
|
|
AcpiUtGetNodeName (Node), Node));
|
|
|
|
/* Extract the method object from the method Node */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NULL_OBJECT);
|
|
}
|
|
|
|
/* Create a mutex for the method if there is a concurrency limit */
|
|
|
|
if ((ObjDesc->Method.Concurrency != ACPI_INFINITE_CONCURRENCY) &&
|
|
(!ObjDesc->Method.Semaphore))
|
|
{
|
|
Status = AcpiOsCreateSemaphore (ObjDesc->Method.Concurrency,
|
|
ObjDesc->Method.Concurrency,
|
|
&ObjDesc->Method.Semaphore);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocate a new parser op to be the root of the parsed
|
|
* method tree
|
|
*/
|
|
Op = AcpiPsAllocOp (AML_METHOD_OP);
|
|
if (!Op)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Init new op with the method name and pointer back to the Node */
|
|
|
|
AcpiPsSetName (Op, Node->Name.Integer);
|
|
Op->Common.Node = Node;
|
|
|
|
/*
|
|
* Get a new OwnerId for objects created by this method. Namespace
|
|
* objects (such as Operation Regions) can be created during the
|
|
* first pass parse.
|
|
*/
|
|
Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Create and initialize a new walk state */
|
|
|
|
WalkState = AcpiDsCreateWalkState (
|
|
ObjDesc->Method.OwnerId, NULL, NULL, NULL);
|
|
if (!WalkState)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto Cleanup2;
|
|
}
|
|
|
|
Status = AcpiDsInitAmlWalk (WalkState, Op, Node,
|
|
ObjDesc->Method.AmlStart,
|
|
ObjDesc->Method.AmlLength, NULL, 1);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiDsDeleteWalkState (WalkState);
|
|
goto Cleanup2;
|
|
}
|
|
|
|
/*
|
|
* Parse the method, first pass
|
|
*
|
|
* The first pass load is where newly declared named objects are added into
|
|
* the namespace. Actual evaluation of the named objects (what would be
|
|
* called a "second pass") happens during the actual execution of the
|
|
* method so that operands to the named objects can take on dynamic
|
|
* run-time values.
|
|
*/
|
|
Status = AcpiPsParseAml (WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup2;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"**** [%4.4s] Parsed **** NamedObj=%p Op=%p\n",
|
|
AcpiUtGetNodeName (Node), Node, Op));
|
|
|
|
/*
|
|
* Delete the parse tree. We simply re-parse the method for every
|
|
* execution since there isn't much overhead (compared to keeping lots
|
|
* of parse trees around)
|
|
*/
|
|
AcpiNsDeleteNamespaceSubtree (Node);
|
|
AcpiNsDeleteNamespaceByOwner (ObjDesc->Method.OwnerId);
|
|
|
|
Cleanup2:
|
|
AcpiUtReleaseOwnerId (&ObjDesc->Method.OwnerId);
|
|
|
|
Cleanup:
|
|
AcpiPsDeleteParseTree (Op);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
#endif
|
|
|
|
|