735 lines
24 KiB
C
735 lines
24 KiB
C
/*******************************************************************************
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*
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* Module Name: dsutils - Dispatcher utilities
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* $Revision: 100 $
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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 - 2003, 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 __DSUTILS_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 "acdebug.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsutils")
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsIsResultUsed
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*
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* PARAMETERS: Op
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* ResultObj
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* WalkState
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check if a result object will be used by the parent
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*
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******************************************************************************/
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BOOLEAN
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AcpiDsIsResultUsed (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState)
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{
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const ACPI_OPCODE_INFO *ParentInfo;
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ACPI_FUNCTION_TRACE_PTR ("DsIsResultUsed", Op);
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/* Must have both an Op and a Result Object */
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if (!Op)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
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return_VALUE (TRUE);
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}
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/*
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* If there is no parent, the result can't possibly be used!
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* (An executing method typically has no parent, since each
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* method is parsed separately) However, a method that is
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* invoked from another method has a parent.
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*/
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if (!Op->Common.Parent)
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{
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return_VALUE (FALSE);
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}
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/*
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* Get info on the parent. The root Op is AML_SCOPE
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*/
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ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
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if (ParentInfo->Class == AML_CLASS_UNKNOWN)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown parent opcode. Op=%p\n", Op));
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return_VALUE (FALSE);
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}
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/*
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* Decide what to do with the result based on the parent. If
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* the parent opcode will not use the result, delete the object.
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* Otherwise leave it as is, it will be deleted when it is used
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* as an operand later.
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*/
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switch (ParentInfo->Class)
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{
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case AML_CLASS_CONTROL:
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switch (Op->Common.Parent->Common.AmlOpcode)
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{
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case AML_RETURN_OP:
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/* Never delete the return value associated with a return opcode */
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goto ResultUsed;
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case AML_IF_OP:
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case AML_WHILE_OP:
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/*
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* If we are executing the predicate AND this is the predicate op,
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* we will use the return value
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*/
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if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
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(WalkState->ControlState->Control.PredicateOp == Op))
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{
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goto ResultUsed;
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}
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break;
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default:
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/* Ignore other control opcodes */
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break;
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}
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/* The general control opcode returns no result */
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goto ResultNotUsed;
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case AML_CLASS_CREATE:
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/*
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* These opcodes allow TermArg(s) as operands and therefore
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* the operands can be method calls. The result is used.
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*/
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goto ResultUsed;
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case AML_CLASS_NAMED_OBJECT:
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if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP))
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{
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/*
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* These opcodes allow TermArg(s) as operands and therefore
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* the operands can be method calls. The result is used.
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*/
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goto ResultUsed;
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}
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goto ResultNotUsed;
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default:
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/*
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* In all other cases. the parent will actually use the return
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* object, so keep it.
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*/
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goto ResultUsed;
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}
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ResultUsed:
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n",
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AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
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AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
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return_VALUE (TRUE);
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ResultNotUsed:
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n",
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AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
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AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
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return_VALUE (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsDeleteResultIfNotUsed
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*
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* PARAMETERS: Op
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* ResultObj
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* WalkState
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*
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* RETURN: Status
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*
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* DESCRIPTION: Used after interpretation of an opcode. If there is an internal
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* result descriptor, check if the parent opcode will actually use
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* this result. If not, delete the result now so that it will
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* not become orphaned.
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*
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******************************************************************************/
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void
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AcpiDsDeleteResultIfNotUsed (
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ACPI_PARSE_OBJECT *Op,
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ACPI_OPERAND_OBJECT *ResultObj,
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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_STATUS Status;
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ACPI_FUNCTION_TRACE_PTR ("DsDeleteResultIfNotUsed", ResultObj);
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if (!Op)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
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return_VOID;
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}
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if (!ResultObj)
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{
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return_VOID;
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}
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if (!AcpiDsIsResultUsed (Op, WalkState))
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{
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/*
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* Must pop the result stack (ObjDesc should be equal to ResultObj)
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*/
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Status = AcpiDsResultPop (&ObjDesc, WalkState);
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if (ACPI_SUCCESS (Status))
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{
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AcpiUtRemoveReference (ResultObj);
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}
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsResolveOperands
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*
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* PARAMETERS: WalkState - Current walk state with operands on stack
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*
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* RETURN: Status
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*
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* DESCRIPTION: Resolve all operands to their values. Used to prepare
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* arguments to a control method invocation (a call from one
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* method to another.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsResolveOperands (
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 i;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR ("DsResolveOperands", WalkState);
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/*
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* Attempt to resolve each of the valid operands
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* Method arguments are passed by value, not by reference
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*/
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for (i = 0; i < WalkState->NumOperands; i++)
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{
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Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState);
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if (ACPI_FAILURE (Status))
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{
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break;
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}
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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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* FUNCTION: AcpiDsClearOperands
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*
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* PARAMETERS: WalkState - Current walk state with operands on stack
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*
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* RETURN: None
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*
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* DESCRIPTION: Clear all operands on the current walk state operand stack.
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*
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******************************************************************************/
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void
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AcpiDsClearOperands (
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 i;
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ACPI_FUNCTION_TRACE_PTR ("AcpiDsClearOperands", WalkState);
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/*
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* Remove a reference on each operand on the stack
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*/
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for (i = 0; i < WalkState->NumOperands; i++)
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{
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/*
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* Remove a reference to all operands, including both
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* "Arguments" and "Targets".
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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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WalkState->NumOperands = 0;
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return_VOID;
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}
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#endif
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsCreateOperand
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*
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* PARAMETERS: WalkState
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* Arg
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parse tree object that is an argument to an AML
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* opcode to the equivalent interpreter object. This may include
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* looking up a name or entering a new name into the internal
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* namespace.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsCreateOperand (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Arg,
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UINT32 ArgIndex)
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{
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ACPI_STATUS Status = AE_OK;
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char *NameString;
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UINT32 NameLength;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_PARSE_OBJECT *ParentOp;
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UINT16 Opcode;
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ACPI_INTERPRETER_MODE InterpreterMode;
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const ACPI_OPCODE_INFO *OpInfo;
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|
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ACPI_FUNCTION_TRACE_PTR ("DsCreateOperand", Arg);
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|
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/* A valid name must be looked up in the namespace */
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if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
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(Arg->Common.Value.String))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg));
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/* Get the entire name string from the AML stream */
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Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer,
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&NameString, &NameLength);
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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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* All prefixes have been handled, and the name is
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* in NameString
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*/
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|
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/*
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* Special handling for BufferField declarations. This is a deferred
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* opcode that unfortunately defines the field name as the last
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* parameter instead of the first. We get here when we are performing
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* the deferred execution, so the actual name of the field is already
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* in the namespace. We don't want to attempt to look it up again
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* because we may be executing in a different scope than where the
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* actual opcode exists.
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*/
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if ((WalkState->DeferredNode) &&
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(WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) &&
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(ArgIndex != 0))
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{
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ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, WalkState->DeferredNode);
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Status = AE_OK;
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}
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else /* All other opcodes */
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{
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/*
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* Differentiate between a namespace "create" operation
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* versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
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* IMODE_EXECUTE) in order to support the creation of
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* namespace objects during the execution of control methods.
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*/
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ParentOp = Arg->Common.Parent;
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OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
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if ((OpInfo->Flags & AML_NSNODE) &&
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(ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
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(ParentOp->Common.AmlOpcode != AML_REGION_OP) &&
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(ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
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{
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/* Enter name into namespace if not found */
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InterpreterMode = ACPI_IMODE_LOAD_PASS2;
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}
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else
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{
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/* Return a failure if name not found */
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InterpreterMode = ACPI_IMODE_EXECUTE;
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}
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Status = AcpiNsLookup (WalkState->ScopeInfo, NameString,
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ACPI_TYPE_ANY, InterpreterMode,
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ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
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WalkState,
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ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc));
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/*
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* The only case where we pass through (ignore) a NOT_FOUND
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* error is for the CondRefOf opcode.
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*/
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if (Status == AE_NOT_FOUND)
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{
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if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP)
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{
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/*
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* For the Conditional Reference op, it's OK if
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* the name is not found; We just need a way to
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* indicate this to the interpreter, set the
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* object to the root
|
|
*/
|
|
ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, AcpiGbl_RootNode);
|
|
Status = AE_OK;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* We just plain didn't find it -- which is a
|
|
* very serious error at this point
|
|
*/
|
|
Status = AE_AML_NAME_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_REPORT_NSERROR (NameString, Status);
|
|
}
|
|
}
|
|
|
|
/* Free the namestring created above */
|
|
|
|
ACPI_MEM_FREE (NameString);
|
|
|
|
/* Check status from the lookup */
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Put the resulting object onto the current object stack */
|
|
|
|
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
|
|
}
|
|
else
|
|
{
|
|
/* Check for null name case */
|
|
|
|
if (Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
|
|
{
|
|
/*
|
|
* If the name is null, this means that this is an
|
|
* optional result parameter that was not specified
|
|
* in the original ASL. Create a Zero Constant for a
|
|
* placeholder. (Store to a constant is a Noop.)
|
|
*/
|
|
Opcode = AML_ZERO_OP; /* Has no arguments! */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", Arg));
|
|
}
|
|
else
|
|
{
|
|
Opcode = Arg->Common.AmlOpcode;
|
|
}
|
|
|
|
/* Get the object type of the argument */
|
|
|
|
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
|
|
if (OpInfo->ObjectType == ACPI_TYPE_INVALID)
|
|
{
|
|
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
if (OpInfo->Flags & AML_HAS_RETVAL)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"Argument previously created, already stacked \n"));
|
|
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (
|
|
WalkState->Operands [WalkState->NumOperands - 1], WalkState));
|
|
|
|
/*
|
|
* Use value that was already previously returned
|
|
* by the evaluation of this argument
|
|
*/
|
|
Status = AcpiDsResultPopFromBottom (&ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
/*
|
|
* Only error is underflow, and this indicates
|
|
* a missing or null operand!
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Missing or null operand, %s\n",
|
|
AcpiFormatException (Status)));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Create an ACPI_INTERNAL_OBJECT for the argument */
|
|
|
|
ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType);
|
|
if (!ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Initialize the new object */
|
|
|
|
Status = AcpiDsInitObjectFromOp (WalkState, Arg,
|
|
Opcode, &ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiUtDeleteObjectDesc (ObjDesc);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/* Put the operand object on the object stack */
|
|
|
|
Status = AcpiDsObjStackPush (ObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateOperands
|
|
*
|
|
* PARAMETERS: FirstArg - First argument of a parser argument tree
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert an operator's arguments from a parse tree format to
|
|
* namespace objects and place those argument object on the object
|
|
* stack in preparation for evaluation by the interpreter.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsCreateOperands (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *FirstArg)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_PARSE_OBJECT *Arg;
|
|
UINT32 ArgCount = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("DsCreateOperands", FirstArg);
|
|
|
|
|
|
/* For all arguments in the list... */
|
|
|
|
Arg = FirstArg;
|
|
while (Arg)
|
|
{
|
|
Status = AcpiDsCreateOperand (WalkState, Arg, ArgCount);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n",
|
|
ArgCount, Arg, FirstArg));
|
|
|
|
/* Move on to next argument, if any */
|
|
|
|
Arg = Arg->Common.Next;
|
|
ArgCount++;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
|
|
|
|
Cleanup:
|
|
/*
|
|
* We must undo everything done above; meaning that we must
|
|
* pop everything off of the operand stack and delete those
|
|
* objects
|
|
*/
|
|
(void) AcpiDsObjStackPopAndDelete (ArgCount, WalkState);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While creating Arg %d - %s\n",
|
|
(ArgCount + 1), AcpiFormatException (Status)));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|