387 lines
14 KiB
C
387 lines
14 KiB
C
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/******************************************************************************
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*
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* Module Name: exstoren - AML Interpreter object store support,
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* Store to Node (namespace object)
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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 - 2010, 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 __EXSTOREN_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exstoren")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveObject
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*
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* PARAMETERS: SourceDescPtr - Pointer to the source object
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* TargetType - Current type of the target
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* WalkState - Current walk state
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*
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* RETURN: Status, resolved object in SourceDescPtr.
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*
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* DESCRIPTION: Resolve an object. If the object is a reference, dereference
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* it and return the actual object in the SourceDescPtr.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveObject (
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ACPI_OPERAND_OBJECT **SourceDescPtr,
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ACPI_OBJECT_TYPE TargetType,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *SourceDesc = *SourceDescPtr;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (ExResolveObject);
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/* Ensure we have a Target that can be stored to */
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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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/*
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* These cases all require only Integers or values that
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* can be converted to Integers (Strings or Buffers)
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*/
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/*
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* Stores into a Field/Region or into a Integer/Buffer/String
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* are all essentially the same. This case handles the
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* "interchangeable" types Integer, String, and Buffer.
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*/
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if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
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{
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/* Resolve a reference object first */
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Status = AcpiExResolveToValue (SourceDescPtr, 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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/* For CopyObject, no further validation necessary */
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if (WalkState->Opcode == AML_COPY_OP)
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{
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break;
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}
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/* Must have a Integer, Buffer, or String */
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if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER) &&
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(SourceDesc->Common.Type != ACPI_TYPE_BUFFER) &&
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(SourceDesc->Common.Type != ACPI_TYPE_STRING) &&
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!((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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/* Conversion successful but still not a valid type */
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ACPI_ERROR ((AE_INFO,
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"Cannot assign type %s to %s (must be type Int/Str/Buf)",
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AcpiUtGetObjectTypeName (SourceDesc),
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AcpiUtGetTypeName (TargetType)));
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Status = AE_AML_OPERAND_TYPE;
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}
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break;
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case ACPI_TYPE_LOCAL_ALIAS:
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case ACPI_TYPE_LOCAL_METHOD_ALIAS:
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/*
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* All aliases should have been resolved earlier, during the
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* operand resolution phase.
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*/
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ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object"));
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Status = AE_AML_INTERNAL;
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break;
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case ACPI_TYPE_PACKAGE:
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default:
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/*
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* All other types than Alias and the various Fields come here,
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* including the untyped case - ACPI_TYPE_ANY.
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*/
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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: AcpiExStoreObjectToObject
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*
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* PARAMETERS: SourceDesc - Object to store
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* DestDesc - Object to receive a copy of the source
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* NewDesc - New object if DestDesc is obsoleted
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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" an object to another object. This may include
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* converting the source type to the target type (implicit
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* conversion), and a copy of the value of the source to
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* the target.
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*
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* The Assignment of an object to another (not named) object
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* is handled here.
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* The Source 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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* This module allows destination types of Number, String,
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* Buffer, and Package.
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*
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* Assumes parameters are already validated. NOTE: SourceDesc
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* resolution (from a reference object) must be performed by
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* the caller if necessary.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExStoreObjectToObject (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_OPERAND_OBJECT *DestDesc,
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ACPI_OPERAND_OBJECT **NewDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *ActualSrcDesc;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToObject, SourceDesc);
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ActualSrcDesc = SourceDesc;
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if (!DestDesc)
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{
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/*
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* There is no destination object (An uninitialized node or
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* package element), so we can simply copy the source object
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* creating a new destination object
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*/
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Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState);
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return_ACPI_STATUS (Status);
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}
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if (SourceDesc->Common.Type != DestDesc->Common.Type)
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{
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/*
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* The source type does not match the type of the destination.
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* Perform the "implicit conversion" of the source to the current type
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* of the target as per the ACPI specification.
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*
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* If no conversion performed, ActualSrcDesc = SourceDesc.
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* Otherwise, ActualSrcDesc is a temporary object to hold the
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* converted object.
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*/
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Status = AcpiExConvertToTargetType (DestDesc->Common.Type,
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SourceDesc, &ActualSrcDesc, 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 (SourceDesc == ActualSrcDesc)
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{
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/*
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* No conversion was performed. Return the SourceDesc as the
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* new object.
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*/
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*NewDesc = SourceDesc;
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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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* We now have two objects of identical types, and we can perform a
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* copy of the *value* of the source object.
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*/
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switch (DestDesc->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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DestDesc->Integer.Value = ActualSrcDesc->Integer.Value;
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/* Truncate value if we are executing from a 32-bit ACPI table */
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AcpiExTruncateFor32bitTable (DestDesc);
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break;
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case ACPI_TYPE_STRING:
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Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc);
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break;
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case ACPI_TYPE_BUFFER:
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Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc);
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break;
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case ACPI_TYPE_PACKAGE:
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Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc,
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WalkState);
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break;
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default:
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/*
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* All other types come here.
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*/
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ACPI_WARNING ((AE_INFO, "Store into type %s not implemented",
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AcpiUtGetObjectTypeName (DestDesc)));
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Status = AE_NOT_IMPLEMENTED;
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break;
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}
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if (ActualSrcDesc != SourceDesc)
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{
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/* Delete the intermediate (temporary) source object */
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AcpiUtRemoveReference (ActualSrcDesc);
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}
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*NewDesc = DestDesc;
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return_ACPI_STATUS (Status);
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}
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