635 lines
20 KiB
C
635 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: dsmethod - Parser/Interpreter interface - control method parsing
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* $Revision: 68 $
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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, 2000, 2001, 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 __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 "actables.h"
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#include "acdebug.h"
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#define _COMPONENT ACPI_DISPATCHER
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MODULE_NAME ("dsmethod")
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsParseMethod
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*
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* PARAMETERS: ObjHandle - Node of the method
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* Level - Current nesting level
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* Context - Points to a method counter
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* ReturnValue - Not used
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*
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* RETURN: Status
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*
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* DESCRIPTION: Call the parser and parse the AML that is
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* associated with the method.
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*
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* MUTEX: Assumes parser is locked
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsParseMethod (
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ACPI_HANDLE ObjHandle)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_PARSE_OBJECT *Op;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OWNER_ID OwnerId;
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ACPI_WALK_STATE *WalkState;
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FUNCTION_TRACE_PTR ("DsParseMethod", ObjHandle);
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/* Parameter Validation */
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if (!ObjHandle)
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{
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Parsing [%4.4s] **** NamedObj=%p\n",
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&((ACPI_NAMESPACE_NODE *)ObjHandle)->Name, ObjHandle));
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/* Extract the method object from the method Node */
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Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
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ObjDesc = Node->Object;
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Create a mutex for the method if there is a concurrency limit */
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if ((ObjDesc->Method.Concurrency != INFINITE_CONCURRENCY) &&
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(!ObjDesc->Method.Semaphore))
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{
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Status = AcpiOsCreateSemaphore (ObjDesc->Method.Concurrency,
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ObjDesc->Method.Concurrency,
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&ObjDesc->Method.Semaphore);
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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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* Allocate a new parser op to be the root of the parsed
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* method tree
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*/
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Op = AcpiPsAllocOp (AML_METHOD_OP);
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if (!Op)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Init new op with the method name and pointer back to the Node */
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AcpiPsSetName (Op, Node->Name);
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Op->Node = Node;
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/* Create and initialize a new walk state */
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WalkState = AcpiDsCreateWalkState (TABLE_ID_DSDT,
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NULL, NULL, NULL);
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if (!WalkState)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Status = AcpiDsInitAmlWalk (WalkState, Op, Node, ObjDesc->Method.AmlStart,
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ObjDesc->Method.AmlLength, NULL, NULL, 1);
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if (ACPI_FAILURE (Status))
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{
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/* TBD: delete walk state */
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return_ACPI_STATUS (Status);
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}
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/*
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* Parse the method, first pass
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*
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* The first pass load is where newly declared named objects are
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* added into the namespace. Actual evaluation of
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* the named objects (what would be called a "second
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* pass") happens during the actual execution of the
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* method so that operands to the named objects can
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* take on dynamic run-time values.
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*/
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Status = AcpiPsParseAml (WalkState);
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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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/* Get a new OwnerId for objects created by this method */
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OwnerId = AcpiUtAllocateOwnerId (OWNER_TYPE_METHOD);
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ObjDesc->Method.OwningId = OwnerId;
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** [%4.4s] Parsed **** NamedObj=%p Op=%p\n",
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&((ACPI_NAMESPACE_NODE *)ObjHandle)->Name, ObjHandle, Op));
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AcpiPsDeleteParseTree (Op);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsBeginMethodExecution
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*
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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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* MUTEX: Locks/unlocks parser.
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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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FUNCTION_TRACE_PTR ("DsBeginMethodExecution", MethodNode);
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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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* 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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* 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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WAIT_FOREVER);
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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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* FUNCTION: AcpiDsCallControlMethod
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*
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* PARAMETERS: WalkState - Current state of the walk
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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_WALK_LIST *WalkList,
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ACPI_WALK_STATE *ThisWalkState,
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ACPI_PARSE_OBJECT *Op) /* TBD: This operand is obsolete */
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *MethodNode;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_WALK_STATE *NextWalkState;
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UINT32 i;
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FUNCTION_TRACE_PTR ("DsCallControlMethod", ThisWalkState);
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n",
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ThisWalkState->PrevOp, ThisWalkState));
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/*
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* Get the namespace entry for the control method we are about to call
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*/
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MethodNode = ThisWalkState->MethodCallNode;
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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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ObjDesc = AcpiNsGetAttachedObject (MethodNode);
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Init for new method, wait on concurrency semaphore */
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Status = AcpiDsBeginMethodExecution (MethodNode, ObjDesc,
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ThisWalkState->MethodNode);
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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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/* 1) Parse: Create a new walk state for the preempting walk */
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NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwningId,
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Op, ObjDesc, NULL);
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if (!NextWalkState)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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goto Cleanup;
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}
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/* Create and init a Root Node */
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Op = AcpiPsAllocOp (AML_SCOPE_OP);
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if (!Op)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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Status = AcpiDsInitAmlWalk (NextWalkState, Op, MethodNode,
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ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength,
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NULL, NULL, 1);
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if (ACPI_FAILURE (Status))
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{
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/* TBD: delete walk state */
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goto Cleanup;
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}
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/* Begin AML parse */
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Status = AcpiPsParseAml (NextWalkState);
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AcpiPsDeleteParseTree (Op);
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/* 2) Execute: Create a new state for the preempting walk */
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NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwningId,
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NULL, ObjDesc, WalkList);
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if (!NextWalkState)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* The resolved arguments were put on the previous walk state's operand
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* stack. Operands on the previous walk state stack always
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* start at index 0.
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* Null terminate the list of arguments
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*/
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ThisWalkState->Operands [ThisWalkState->NumOperands] = NULL;
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Status = AcpiDsInitAmlWalk (NextWalkState, NULL, MethodNode,
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ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength,
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&ThisWalkState->Operands[0], NULL, 3);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/*
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* Delete the operands on the previous walkstate operand stack
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* (they were copied to new objects)
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*/
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for (i = 0; i < ObjDesc->Method.ParamCount; i++)
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{
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AcpiUtRemoveReference (ThisWalkState->Operands [i]);
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ThisWalkState->Operands [i] = NULL;
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}
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/* Clear the operand stack */
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ThisWalkState->NumOperands = 0;
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Starting nested execution, newstate=%p\n",
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NextWalkState));
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return_ACPI_STATUS (AE_OK);
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/* On error, we must delete the new walk state */
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Cleanup:
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AcpiDsTerminateControlMethod (NextWalkState);
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AcpiDsDeleteWalkState (NextWalkState);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsRestartControlMethod
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*
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* PARAMETERS: WalkState - State of the method when it was preempted
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* Op - Pointer to new current op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Restart a method that was preempted
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsRestartControlMethod (
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT *ReturnDesc)
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{
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ACPI_STATUS Status;
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|
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FUNCTION_TRACE_PTR ("DsRestartControlMethod", WalkState);
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|
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if (ReturnDesc)
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{
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if (WalkState->ReturnUsed)
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{
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/*
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* Get the return value (if any) from the previous method.
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* NULL if no return value
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*/
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Status = AcpiDsResultPush (ReturnDesc, WalkState);
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if (ACPI_FAILURE (Status))
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{
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AcpiUtRemoveReference (ReturnDesc);
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return_ACPI_STATUS (Status);
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}
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}
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else
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{
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/*
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* Delete the return value if it will not be used by the
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* calling method
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*/
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AcpiUtRemoveReference (ReturnDesc);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"Method=%p Return=%p ReturnUsed?=%X ResStack=%p State=%p\n",
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WalkState->MethodCallOp, ReturnDesc, WalkState->ReturnUsed,
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WalkState->Results, WalkState));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsTerminateControlMethod
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*
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* PARAMETERS: WalkState - State of the method
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*
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* RETURN: Status
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*
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* DESCRIPTION: Terminate a control method. Delete everything that the method
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* created, delete all locals and arguments, and delete the parse
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* tree if requested.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsTerminateControlMethod (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_NAMESPACE_NODE *MethodNode;
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FUNCTION_TRACE_PTR ("DsTerminateControlMethod", WalkState);
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/* The method object should be stored in the walk state */
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ObjDesc = WalkState->MethodDesc;
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Delete all arguments and locals */
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AcpiDsMethodDataDeleteAll (WalkState);
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/*
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* Lock the parser while we terminate this method.
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* If this is the last thread executing the method,
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* we have additional cleanup to perform
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*/
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AcpiUtAcquireMutex (ACPI_MTX_PARSER);
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/* Signal completion of the execution of this method if necessary */
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if (WalkState->MethodDesc->Method.Semaphore)
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{
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AcpiOsSignalSemaphore (
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WalkState->MethodDesc->Method.Semaphore, 1);
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}
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/* Decrement the thread count on the method parse tree */
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WalkState->MethodDesc->Method.ThreadCount--;
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if (!WalkState->MethodDesc->Method.ThreadCount)
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{
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/*
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* There are no more threads executing this method. Perform
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* additional cleanup.
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*
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* The method Node is stored in the walk state
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*/
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MethodNode = WalkState->MethodNode;
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/*
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* Delete any namespace entries created immediately underneath
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* the method
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*/
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AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (MethodNode->Child)
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{
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AcpiNsDeleteNamespaceSubtree (MethodNode);
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}
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/*
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* Delete any namespace entries created anywhere else within
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* the namespace
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*/
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AcpiNsDeleteNamespaceByOwner (WalkState->MethodDesc->Method.OwningId);
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AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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}
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AcpiUtReleaseMutex (ACPI_MTX_PARSER);
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return_ACPI_STATUS (AE_OK);
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}
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