823 lines
27 KiB
C
823 lines
27 KiB
C
/*******************************************************************************
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*
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* Module Name: dsmthdat - control method arguments and local variables
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* $Revision: 80 $
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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 - 2004, 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 __DSMTHDAT_C__
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#include "acpi.h"
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#include "acdispat.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsmthdat")
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataInit
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*
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* PARAMETERS: WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize the data structures that hold the method's arguments
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* and locals. The data struct is an array of NTEs for each.
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* This allows RefOf and DeRefOf to work properly for these
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* special data types.
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*
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* NOTES: WalkState fields are initialized to zero by the
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* ACPI_MEM_CALLOCATE().
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*
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* A pseudo-Namespace Node is assigned to each argument and local
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* so that RefOf() can return a pointer to the Node.
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*
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******************************************************************************/
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void
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AcpiDsMethodDataInit (
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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 ("DsMethodDataInit");
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/* Init the method arguments */
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for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
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{
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ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name,
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NAMEOF_ARG_NTE);
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WalkState->Arguments[i].Name.Integer |= (i << 24);
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WalkState->Arguments[i].Descriptor = ACPI_DESC_TYPE_NAMED;
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WalkState->Arguments[i].Type = ACPI_TYPE_ANY;
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WalkState->Arguments[i].Flags = ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_ARG;
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}
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/* Init the method locals */
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for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)
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{
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ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name,
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NAMEOF_LOCAL_NTE);
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WalkState->LocalVariables[i].Name.Integer |= (i << 24);
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WalkState->LocalVariables[i].Descriptor = ACPI_DESC_TYPE_NAMED;
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WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY;
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WalkState->LocalVariables[i].Flags = ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL;
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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: AcpiDsMethodDataDeleteAll
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*
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* PARAMETERS: WalkState - Current walk state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete method locals and arguments. Arguments are only
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* deleted if this method was called from another method.
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*
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******************************************************************************/
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void
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AcpiDsMethodDataDeleteAll (
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 Index;
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ACPI_FUNCTION_TRACE ("DsMethodDataDeleteAll");
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/* Detach the locals */
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for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++)
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{
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if (WalkState->LocalVariables[Index].Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%d=%p\n",
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Index, WalkState->LocalVariables[Index].Object));
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/* Detach object (if present) and remove a reference */
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AcpiNsDetachObject (&WalkState->LocalVariables[Index]);
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}
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}
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/* Detach the arguments */
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for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++)
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{
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if (WalkState->Arguments[Index].Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%d=%p\n",
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Index, WalkState->Arguments[Index].Object));
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/* Detach object (if present) and remove a reference */
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AcpiNsDetachObject (&WalkState->Arguments[Index]);
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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: AcpiDsMethodDataInitArgs
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*
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* PARAMETERS: *Params - Pointer to a parameter list for the method
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* MaxParamCount - The arg count for this method
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* WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize arguments for a method. The parameter list is a list
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* of ACPI operand objects, either null terminated or whose length
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* is defined by MaxParamCount.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataInitArgs (
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ACPI_OPERAND_OBJECT **Params,
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UINT32 MaxParamCount,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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UINT32 Index = 0;
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ACPI_FUNCTION_TRACE_PTR ("DsMethodDataInitArgs", Params);
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if (!Params)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param list passed to method\n"));
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return_ACPI_STATUS (AE_OK);
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}
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/* Copy passed parameters into the new method stack frame */
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while ((Index < ACPI_METHOD_NUM_ARGS) && (Index < MaxParamCount) && Params[Index])
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{
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/*
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* A valid parameter.
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* Store the argument in the method/walk descriptor.
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* Do not copy the arg in order to implement call by reference
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*/
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Status = AcpiDsMethodDataSetValue (AML_ARG_OP, Index, Params[Index], 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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Index++;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%d args passed to method\n", Index));
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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: AcpiDsMethodDataGetNode
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*
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* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
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* Index - Which localVar or argument whose type
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* to get
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* WalkState - Current walk state object
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*
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* RETURN: Get the Node associated with a local or arg.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataGetNode (
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UINT16 Opcode,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE **Node)
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{
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ACPI_FUNCTION_TRACE ("DsMethodDataGetNode");
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/*
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* Method Locals and Arguments are supported
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*/
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switch (Opcode)
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{
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case AML_LOCAL_OP:
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if (Index > ACPI_METHOD_MAX_LOCAL)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Local index %d is invalid (max %d)\n",
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Index, ACPI_METHOD_MAX_LOCAL));
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return_ACPI_STATUS (AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*Node = &WalkState->LocalVariables[Index];
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break;
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case AML_ARG_OP:
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if (Index > ACPI_METHOD_MAX_ARG)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Arg index %d is invalid (max %d)\n",
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Index, ACPI_METHOD_MAX_ARG));
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return_ACPI_STATUS (AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*Node = &WalkState->Arguments[Index];
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Opcode %d is invalid\n", Opcode));
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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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: AcpiDsMethodDataSetValue
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*
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* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
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* Index - Which localVar or argument to get
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* Object - Object to be inserted into the stack entry
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* WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.
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* Note: There is no "implicit conversion" for locals.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataSetValue (
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UINT16 Opcode,
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UINT32 Index,
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ACPI_OPERAND_OBJECT *Object,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_FUNCTION_TRACE ("DsMethodDataSetValue");
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"NewObj %p Opcode %X, Refs=%d [%s]\n", Object,
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Opcode, Object->Common.ReferenceCount,
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AcpiUtGetTypeName (Object->Common.Type)));
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/* Get the namespace node for the arg/local */
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Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
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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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* Increment ref count so object can't be deleted while installed.
|
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* NOTE: We do not copy the object in order to preserve the call by
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* reference semantics of ACPI Control Method invocation.
|
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* (See ACPI Specification 2.0C)
|
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*/
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AcpiUtAddReference (Object);
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/* Install the object */
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Node->Object = Object;
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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: AcpiDsMethodDataGetType
|
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*
|
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* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
|
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* Index - Which localVar or argument whose type
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|
* to get
|
|
* WalkState - Current walk state object
|
|
*
|
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* RETURN: Data type of current value of the selected Arg or Local
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*
|
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******************************************************************************/
|
|
|
|
ACPI_OBJECT_TYPE
|
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AcpiDsMethodDataGetType (
|
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UINT16 Opcode,
|
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UINT32 Index,
|
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ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
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ACPI_OPERAND_OBJECT *Object;
|
|
|
|
|
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ACPI_FUNCTION_TRACE ("DsMethodDataGetType");
|
|
|
|
|
|
/* Get the namespace node for the arg/local */
|
|
|
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Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VALUE ((ACPI_TYPE_NOT_FOUND));
|
|
}
|
|
|
|
/* Get the object */
|
|
|
|
Object = AcpiNsGetAttachedObject (Node);
|
|
if (!Object)
|
|
{
|
|
/* Uninitialized local/arg, return TYPE_ANY */
|
|
|
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return_VALUE (ACPI_TYPE_ANY);
|
|
}
|
|
|
|
/* Get the object type */
|
|
|
|
return_VALUE (ACPI_GET_OBJECT_TYPE (Object));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsMethodDataGetValue
|
|
*
|
|
* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
|
|
* Index - Which localVar or argument to get
|
|
* WalkState - Current walk state object
|
|
* *DestDesc - Ptr to Descriptor into which selected Arg
|
|
* or Local value should be copied
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Retrieve value of selected Arg or Local from the method frame
|
|
* at the current top of the method stack.
|
|
* Used only in AcpiExResolveToValue().
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsMethodDataGetValue (
|
|
UINT16 Opcode,
|
|
UINT32 Index,
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_OPERAND_OBJECT **DestDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_OPERAND_OBJECT *Object;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("DsMethodDataGetValue");
|
|
|
|
|
|
/* Validate the object descriptor */
|
|
|
|
if (!DestDesc)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null object descriptor pointer\n"));
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the namespace node for the arg/local */
|
|
|
|
Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Get the object from the node */
|
|
|
|
Object = Node->Object;
|
|
|
|
/* Examine the returned object, it must be valid. */
|
|
|
|
if (!Object)
|
|
{
|
|
/*
|
|
* Index points to uninitialized object.
|
|
* This means that either 1) The expected argument was
|
|
* not passed to the method, or 2) A local variable
|
|
* was referenced by the method (via the ASL)
|
|
* before it was initialized. Either case is an error.
|
|
*/
|
|
|
|
/* If slack enabled, init the LocalX/ArgX to an Integer of value zero */
|
|
|
|
if (AcpiGbl_EnableInterpreterSlack)
|
|
{
|
|
Object = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
|
|
if (!Object)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
Object->Integer.Value = 0;
|
|
Node->Object = Object;
|
|
}
|
|
|
|
/* Otherwise, return the error */
|
|
|
|
else switch (Opcode)
|
|
{
|
|
case AML_ARG_OP:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Uninitialized Arg[%d] at node %p\n",
|
|
Index, Node));
|
|
|
|
return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);
|
|
|
|
case AML_LOCAL_OP:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Uninitialized Local[%d] at node %p\n",
|
|
Index, Node));
|
|
|
|
return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);
|
|
|
|
default:
|
|
ACPI_REPORT_ERROR (("Not Arg/Local opcode: %X\n", Opcode));
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The Index points to an initialized and valid object.
|
|
* Return an additional reference to the object
|
|
*/
|
|
*DestDesc = Object;
|
|
AcpiUtAddReference (Object);
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsMethodDataDeleteValue
|
|
*
|
|
* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
|
|
* Index - Which localVar or argument to delete
|
|
* WalkState - Current walk state object
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Delete the entry at Opcode:Index on the method stack. Inserts
|
|
* a null into the stack slot after the object is deleted.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsMethodDataDeleteValue (
|
|
UINT16 Opcode,
|
|
UINT32 Index,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_OPERAND_OBJECT *Object;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("DsMethodDataDeleteValue");
|
|
|
|
|
|
/* Get the namespace node for the arg/local */
|
|
|
|
Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Get the associated object */
|
|
|
|
Object = AcpiNsGetAttachedObject (Node);
|
|
|
|
/*
|
|
* Undefine the Arg or Local by setting its descriptor
|
|
* pointer to NULL. Locals/Args can contain both
|
|
* ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
|
|
*/
|
|
Node->Object = NULL;
|
|
|
|
if ((Object) &&
|
|
(ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND))
|
|
{
|
|
/*
|
|
* There is a valid object.
|
|
* Decrement the reference count by one to balance the
|
|
* increment when the object was stored.
|
|
*/
|
|
AcpiUtRemoveReference (Object);
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsStoreObjectToLocal
|
|
*
|
|
* PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
|
|
* Index - Which localVar or argument to set
|
|
* ObjDesc - Value to be stored
|
|
* WalkState - Current walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed
|
|
* as the new value for the Arg or Local and the reference count
|
|
* for ObjDesc is incremented.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsStoreObjectToLocal (
|
|
UINT16 Opcode,
|
|
UINT32 Index,
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_OPERAND_OBJECT *CurrentObjDesc;
|
|
ACPI_OPERAND_OBJECT *NewObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("DsStoreObjectToLocal");
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode=%X Index=%d Obj=%p\n",
|
|
Opcode, Index, ObjDesc));
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the namespace node for the arg/local */
|
|
|
|
Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
CurrentObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (CurrentObjDesc == ObjDesc)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n",
|
|
ObjDesc));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* If the reference count on the object is more than one, we must
|
|
* take a copy of the object before we store. A reference count
|
|
* of exactly 1 means that the object was just created during the
|
|
* evaluation of an expression, and we can safely use it since it
|
|
* is not used anywhere else.
|
|
*/
|
|
NewObjDesc = ObjDesc;
|
|
if (ObjDesc->Common.ReferenceCount > 1)
|
|
{
|
|
Status = AcpiUtCopyIobjectToIobject (ObjDesc, &NewObjDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If there is an object already in this slot, we either
|
|
* have to delete it, or if this is an argument and there
|
|
* is an object reference stored there, we have to do
|
|
* an indirect store!
|
|
*/
|
|
if (CurrentObjDesc)
|
|
{
|
|
/*
|
|
* Check for an indirect store if an argument
|
|
* contains an object reference (stored as an Node).
|
|
* We don't allow this automatic dereferencing for
|
|
* locals, since a store to a local should overwrite
|
|
* anything there, including an object reference.
|
|
*
|
|
* If both Arg0 and Local0 contain RefOf (Local4):
|
|
*
|
|
* Store (1, Arg0) - Causes indirect store to local4
|
|
* Store (1, Local0) - Stores 1 in local0, overwriting
|
|
* the reference to local4
|
|
* Store (1, DeRefof (Local0)) - Causes indirect store to local4
|
|
*
|
|
* Weird, but true.
|
|
*/
|
|
if (Opcode == AML_ARG_OP)
|
|
{
|
|
/*
|
|
* Make sure that the object is the correct type. This may be overkill, but
|
|
* it is here because references were NS nodes in the past. Now they are
|
|
* operand objects of type Reference.
|
|
*/
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) != ACPI_DESC_TYPE_OPERAND)
|
|
{
|
|
ACPI_REPORT_ERROR (("Invalid descriptor type while storing to method arg: [%s]\n",
|
|
AcpiUtGetDescriptorName (CurrentObjDesc)));
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
|
}
|
|
|
|
/*
|
|
* If we have a valid reference object that came from RefOf(), do the
|
|
* indirect store
|
|
*/
|
|
if ((CurrentObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
|
|
(CurrentObjDesc->Reference.Opcode == AML_REF_OF_OP))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"Arg (%p) is an ObjRef(Node), storing in node %p\n",
|
|
NewObjDesc, CurrentObjDesc));
|
|
|
|
/*
|
|
* Store this object to the Node (perform the indirect store)
|
|
* NOTE: No implicit conversion is performed, as per the ACPI
|
|
* specification rules on storing to Locals/Args.
|
|
*/
|
|
Status = AcpiExStoreObjectToNode (NewObjDesc,
|
|
CurrentObjDesc->Reference.Object, WalkState,
|
|
ACPI_NO_IMPLICIT_CONVERSION);
|
|
|
|
/* Remove local reference if we copied the object above */
|
|
|
|
if (NewObjDesc != ObjDesc)
|
|
{
|
|
AcpiUtRemoveReference (NewObjDesc);
|
|
}
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete the existing object
|
|
* before storing the new one
|
|
*/
|
|
AcpiDsMethodDataDeleteValue (Opcode, Index, WalkState);
|
|
}
|
|
|
|
/*
|
|
* Install the Obj descriptor (*NewObjDesc) into
|
|
* the descriptor for the Arg or Local.
|
|
* (increments the object reference count by one)
|
|
*/
|
|
Status = AcpiDsMethodDataSetValue (Opcode, Index, NewObjDesc, WalkState);
|
|
|
|
/* Remove local reference if we copied the object above */
|
|
|
|
if (NewObjDesc != ObjDesc)
|
|
{
|
|
AcpiUtRemoveReference (NewObjDesc);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|