604 lines
20 KiB
C
604 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: exstore - AML Interpreter object store support
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __EXSTORE_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exstore")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiExStoreObjectToIndex (
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ACPI_OPERAND_OBJECT *ValDesc,
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ACPI_OPERAND_OBJECT *DestDesc,
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ACPI_WALK_STATE *WalkState);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExStore
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*
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* PARAMETERS: *SourceDesc - Value to be stored
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* *DestDesc - Where to store it. Must be an NS node
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* or an ACPI_OPERAND_OBJECT of type
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* Reference;
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* WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Store the value described by SourceDesc into the location
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* described by DestDesc. Called by various interpreter
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* functions to store the result of an operation into
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* the destination operand -- not just simply the actual "Store"
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* ASL operator.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExStore (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_OPERAND_OBJECT *DestDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *RefDesc = DestDesc;
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ACPI_FUNCTION_TRACE_PTR (ExStore, DestDesc);
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/* Validate parameters */
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if (!SourceDesc || !DestDesc)
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{
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ACPI_ERROR ((AE_INFO, "Null parameter"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/* DestDesc can be either a namespace node or an ACPI object */
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if (ACPI_GET_DESCRIPTOR_TYPE (DestDesc) == ACPI_DESC_TYPE_NAMED)
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{
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/*
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* Dest is a namespace node,
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* Storing an object into a Named node.
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*/
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Status = AcpiExStoreObjectToNode (SourceDesc,
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(ACPI_NAMESPACE_NODE *) DestDesc, WalkState,
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ACPI_IMPLICIT_CONVERSION);
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return_ACPI_STATUS (Status);
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}
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/* Destination object must be a Reference or a Constant object */
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switch (DestDesc->Common.Type)
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{
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case ACPI_TYPE_LOCAL_REFERENCE:
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break;
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case ACPI_TYPE_INTEGER:
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/* Allow stores to Constants -- a Noop as per ACPI spec */
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if (DestDesc->Common.Flags & AOPOBJ_AML_CONSTANT)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*lint -fallthrough */
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default:
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/* Destination is not a Reference object */
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ACPI_ERROR ((AE_INFO,
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"Target is not a Reference or Constant object - %s [%p]",
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AcpiUtGetObjectTypeName (DestDesc), DestDesc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* Examine the Reference class. These cases are handled:
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*
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* 1) Store to Name (Change the object associated with a name)
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* 2) Store to an indexed area of a Buffer or Package
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* 3) Store to a Method Local or Arg
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* 4) Store to the debug object
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*/
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switch (RefDesc->Reference.Class)
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{
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case ACPI_REFCLASS_REFOF:
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/* Storing an object into a Name "container" */
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Status = AcpiExStoreObjectToNode (SourceDesc,
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RefDesc->Reference.Object,
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WalkState, ACPI_IMPLICIT_CONVERSION);
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break;
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case ACPI_REFCLASS_INDEX:
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/* Storing to an Index (pointer into a packager or buffer) */
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Status = AcpiExStoreObjectToIndex (SourceDesc, RefDesc, WalkState);
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break;
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case ACPI_REFCLASS_LOCAL:
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case ACPI_REFCLASS_ARG:
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/* Store to a method local/arg */
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Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Class,
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RefDesc->Reference.Value, SourceDesc, WalkState);
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break;
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case ACPI_REFCLASS_DEBUG:
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/*
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* Storing to the Debug object causes the value stored to be
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* displayed and otherwise has no effect -- see ACPI Specification
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"**** Write to Debug Object: Object %p %s ****:\n\n",
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SourceDesc, AcpiUtGetObjectTypeName (SourceDesc)));
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ACPI_DEBUG_OBJECT (SourceDesc, 0, 0);
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Unknown Reference Class 0x%2.2X",
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RefDesc->Reference.Class));
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ACPI_DUMP_ENTRY (RefDesc, ACPI_LV_INFO);
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Status = AE_AML_INTERNAL;
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break;
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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: AcpiExStoreObjectToIndex
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*
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* PARAMETERS: *SourceDesc - Value to be stored
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* *DestDesc - Named object to receive the value
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* WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Store the object to indexed Buffer or Package element
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiExStoreObjectToIndex (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_OPERAND_OBJECT *IndexDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *NewDesc;
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UINT8 Value = 0;
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UINT32 i;
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ACPI_FUNCTION_TRACE (ExStoreObjectToIndex);
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/*
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* Destination must be a reference pointer, and
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* must point to either a buffer or a package
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*/
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switch (IndexDesc->Reference.TargetType)
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{
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case ACPI_TYPE_PACKAGE:
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/*
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* Storing to a package element. Copy the object and replace
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* any existing object with the new object. No implicit
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* conversion is performed.
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*
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* The object at *(IndexDesc->Reference.Where) is the
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* element within the package that is to be modified.
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* The parent package object is at IndexDesc->Reference.Object
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*/
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ObjDesc = *(IndexDesc->Reference.Where);
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if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE &&
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SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE)
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{
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/* This is a DDBHandle, just add a reference to it */
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AcpiUtAddReference (SourceDesc);
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NewDesc = SourceDesc;
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}
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else
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{
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/* Normal object, copy it */
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Status = AcpiUtCopyIobjectToIobject (SourceDesc, &NewDesc, 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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}
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if (ObjDesc)
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{
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/* Decrement reference count by the ref count of the parent package */
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for (i = 0;
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i < ((ACPI_OPERAND_OBJECT *)
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IndexDesc->Reference.Object)->Common.ReferenceCount;
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i++)
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{
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AcpiUtRemoveReference (ObjDesc);
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}
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}
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*(IndexDesc->Reference.Where) = NewDesc;
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/* Increment ref count by the ref count of the parent package-1 */
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for (i = 1;
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i < ((ACPI_OPERAND_OBJECT *)
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IndexDesc->Reference.Object)->Common.ReferenceCount;
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i++)
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{
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AcpiUtAddReference (NewDesc);
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}
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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/*
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* Store into a Buffer or String (not actually a real BufferField)
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* at a location defined by an Index.
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*
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* The first 8-bit element of the source object is written to the
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* 8-bit Buffer location defined by the Index destination object,
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* according to the ACPI 2.0 specification.
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*/
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/*
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* Make sure the target is a Buffer or String. An error should
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* not happen here, since the ReferenceObject was constructed
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* by the INDEX_OP code.
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*/
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ObjDesc = IndexDesc->Reference.Object;
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if ((ObjDesc->Common.Type != ACPI_TYPE_BUFFER) &&
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(ObjDesc->Common.Type != ACPI_TYPE_STRING))
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{
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* The assignment of the individual elements will be slightly
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* different for each source type.
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*/
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switch (SourceDesc->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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/* Use the least-significant byte of the integer */
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Value = (UINT8) (SourceDesc->Integer.Value);
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break;
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case ACPI_TYPE_BUFFER:
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case ACPI_TYPE_STRING:
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/* Note: Takes advantage of common string/buffer fields */
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Value = SourceDesc->Buffer.Pointer[0];
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break;
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default:
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/* All other types are invalid */
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ACPI_ERROR ((AE_INFO,
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"Source must be Integer/Buffer/String type, not %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Store the source value into the target buffer byte */
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ObjDesc->Buffer.Pointer[IndexDesc->Reference.Value] = Value;
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break;
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default:
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ACPI_ERROR ((AE_INFO,
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"Target is not a Package or BufferField"));
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Status = AE_AML_OPERAND_TYPE;
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break;
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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: AcpiExStoreObjectToNode
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*
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* PARAMETERS: SourceDesc - Value to be stored
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* Node - Named object to receive the value
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* WalkState - Current walk state
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* ImplicitConversion - Perform implicit conversion (yes/no)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Store the object to the named object.
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*
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* The Assignment of an object to a named object is handled here
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* The value passed in will replace the current value (if any)
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* with the input value.
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*
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* When storing into an object the data is converted to the
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* target object type then stored in the object. This means
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* that the target object type (for an initialized target) will
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* not be changed by a store operation.
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*
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* Assumes parameters are already validated.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExStoreObjectToNode (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_NAMESPACE_NODE *Node,
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ACPI_WALK_STATE *WalkState,
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UINT8 ImplicitConversion)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *TargetDesc;
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ACPI_OPERAND_OBJECT *NewDesc;
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ACPI_OBJECT_TYPE TargetType;
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ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);
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/* Get current type of the node, and object attached to Node */
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TargetType = AcpiNsGetType (Node);
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TargetDesc = AcpiNsGetAttachedObject (Node);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
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SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
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Node, AcpiUtGetTypeName (TargetType)));
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/*
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* Resolve the source object to an actual value
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* (If it is a reference object)
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*/
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Status = AcpiExResolveObject (&SourceDesc, TargetType, 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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/* If no implicit conversion, drop into the default case below */
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if ((!ImplicitConversion) ||
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((WalkState->Opcode == AML_COPY_OP) &&
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(TargetType != ACPI_TYPE_LOCAL_REGION_FIELD) &&
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(TargetType != ACPI_TYPE_LOCAL_BANK_FIELD) &&
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(TargetType != ACPI_TYPE_LOCAL_INDEX_FIELD)))
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{
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/*
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* Force execution of default (no implicit conversion). Note:
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* CopyObject does not perform an implicit conversion, as per the ACPI
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* spec -- except in case of region/bank/index fields -- because these
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* objects must retain their original type permanently.
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*/
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TargetType = ACPI_TYPE_ANY;
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}
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/* Do the actual store operation */
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switch (TargetType)
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{
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case ACPI_TYPE_BUFFER_FIELD:
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case ACPI_TYPE_LOCAL_REGION_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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case ACPI_TYPE_LOCAL_INDEX_FIELD:
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/* For fields, copy the source data to the target field. */
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|
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Status = AcpiExWriteDataToField (SourceDesc, TargetDesc,
|
|
&WalkState->ResultObj);
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/*
|
|
* These target types are all of type Integer/String/Buffer, and
|
|
* therefore support implicit conversion before the store.
|
|
*
|
|
* Copy and/or convert the source object to a new target object
|
|
*/
|
|
Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc,
|
|
&NewDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
if (NewDesc != TargetDesc)
|
|
{
|
|
/*
|
|
* Store the new NewDesc as the new value of the Name, and set
|
|
* the Name's type to that of the value being stored in it.
|
|
* SourceDesc reference count is incremented by AttachObject.
|
|
*
|
|
* Note: This may change the type of the node if an explicit store
|
|
* has been performed such that the node/object type has been
|
|
* changed.
|
|
*/
|
|
Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"Store %s into %s via Convert/Attach\n",
|
|
AcpiUtGetObjectTypeName (SourceDesc),
|
|
AcpiUtGetObjectTypeName (NewDesc)));
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"Storing %s (%p) directly into node (%p) with no implicit conversion\n",
|
|
AcpiUtGetObjectTypeName (SourceDesc), SourceDesc, Node));
|
|
|
|
/* No conversions for all other types. Just attach the source object */
|
|
|
|
Status = AcpiNsAttachObject (Node, SourceDesc,
|
|
SourceDesc->Common.Type);
|
|
break;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|