utcopy.c

acpi tools for linux include acpiexec and acpixtract

/******************************************************************************
 *
 * Module Name: utcopy - Internal to external object translation utilities
 *              $Revision: 1.136 $
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2008, Intel Corp.
 * All rights reserved.
 *
 * 2. License
 *
 * 2.1. This is your license from Intel Corp. under its intellectual property
 * rights.  You may have additional license terms from the party that provided
 * you this software, covering your right to use that party's intellectual
 * property rights.
 *
 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
 * copy of the source code appearing in this file ("Covered Code") an
 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
 * base code distributed originally by Intel ("Original Intel Code") to copy,
 * make derivatives, distribute, use and display any portion of the Covered
 * Code in any form, with the right to sublicense such rights; and
 *
 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
 * license (with the right to sublicense), under only those claims of Intel
 * patents that are infringed by the Original Intel Code, to make, use, sell,
 * offer to sell, and import the Covered Code and derivative works thereof
 * solely to the minimum extent necessary to exercise the above copyright
 * license, and in no event shall the patent license extend to any additions
 * to or modifications of the Original Intel Code.  No other license or right
 * is granted directly or by implication, estoppel or otherwise;
 *
 * The above copyright and patent license is granted only if the following
 * conditions are met:
 *
 * 3. Conditions
 *
 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification with rights to further distribute source must include
 * the above Copyright Notice, the above License, this list of Conditions,
 * and the following Disclaimer and Export Compliance provision.  In addition,
 * Licensee must cause all Covered Code to which Licensee contributes to
 * contain a file documenting the changes Licensee made to create that Covered
 * Code and the date of any change.  Licensee must include in that file the
 * documentation of any changes made by any predecessor Licensee.  Licensee
 * must include a prominent statement that the modification is derived,
 * directly or indirectly, from Original Intel Code.
 *
 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification without rights to further distribute source must
 * include the following Disclaimer and Export Compliance provision in the
 * documentation and/or other materials provided with distribution.  In
 * addition, Licensee may not authorize further sublicense of source of any
 * portion of the Covered Code, and must include terms to the effect that the
 * license from Licensee to its licensee is limited to the intellectual
 * property embodied in the software Licensee provides to its licensee, and
 * not to intellectual property embodied in modifications its licensee may
 * make.
 *
 * 3.3. Redistribution of Executable. Redistribution in executable form of any
 * substantial portion of the Covered Code or modification must reproduce the
 * above Copyright Notice, and the following Disclaimer and Export Compliance
 * provision in the documentation and/or other materials provided with the
 * distribution.
 *
 * 3.4. Intel retains all right, title, and interest in and to the Original
 * Intel Code.
 *
 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
 * Intel shall be used in advertising or otherwise to promote the sale, use or
 * other dealings in products derived from or relating to the Covered Code
 * without prior written authorization from Intel.
 *
 * 4. Disclaimer and Export Compliance
 *
 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
 * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
 * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
 * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
 * PARTICULAR PURPOSE.
 *
 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
 * LIMITED REMEDY.
 *
 * 4.3. Licensee shall not export, either directly or indirectly, any of this
 * software or system incorporating such software without first obtaining any
 * required license or other approval from the U. S. Department of Commerce or
 * any other agency or department of the United States Government.  In the
 * event Licensee exports any such software from the United States or
 * re-exports any such software from a foreign destination, Licensee shall
 * ensure that the distribution and export/re-export of the software is in
 * compliance with all laws, regulations, orders, or other restrictions of the
 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 * any of its subsidiaries will export/re-export any technical data, process,
 * software, or service, directly or indirectly, to any country for which the
 * United States government or any agency thereof requires an export license,
 * other governmental approval, or letter of assurance, without first obtaining
 * such license, approval or letter.
 *
 *****************************************************************************/

#define __UTCOPY_C__

#include "acpi.h"
#include "amlcode.h"


#define _COMPONENT          ACPI_UTILITIES
        ACPI_MODULE_NAME    ("utcopy")

/* Local prototypes */

static ACPI_STATUS
AcpiUtCopyIsimpleToEsimple (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_OBJECT             *ExternalObject,
    UINT8                   *DataSpace,
    ACPI_SIZE               *BufferSpaceUsed);

static ACPI_STATUS
AcpiUtCopyIelementToIelement (
    UINT8                   ObjectType,
    ACPI_OPERAND_OBJECT     *SourceObject,
    ACPI_GENERIC_STATE      *State,
    void                    *Context);

static ACPI_STATUS
AcpiUtCopyIpackageToEpackage (
    ACPI_OPERAND_OBJECT     *InternalObject,
    UINT8                   *Buffer,
    ACPI_SIZE               *SpaceUsed);

static ACPI_STATUS
AcpiUtCopyEsimpleToIsimple(
    ACPI_OBJECT             *UserObj,
    ACPI_OPERAND_OBJECT     **ReturnObj);

static ACPI_STATUS
AcpiUtCopyEpackageToIpackage (
    ACPI_OBJECT             *ExternalObject,
    ACPI_OPERAND_OBJECT     **InternalObject);

static ACPI_STATUS
AcpiUtCopySimpleObject (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_OPERAND_OBJECT     *DestDesc);

static ACPI_STATUS
AcpiUtCopyIelementToEelement (
    UINT8                   ObjectType,
    ACPI_OPERAND_OBJECT     *SourceObject,
    ACPI_GENERIC_STATE      *State,
    void                    *Context);

static ACPI_STATUS
AcpiUtCopyIpackageToIpackage (
    ACPI_OPERAND_OBJECT     *SourceObj,
    ACPI_OPERAND_OBJECT     *DestObj,
    ACPI_WALK_STATE         *WalkState);


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIsimpleToEsimple
 *
 * PARAMETERS:  InternalObject      - Source object to be copied
 *              ExternalObject      - Where to return the copied object
 *              DataSpace           - Where object data is returned (such as
 *                                    buffer and string data)
 *              BufferSpaceUsed     - Length of DataSpace that was used
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to copy a simple internal object to
 *              an external object.
 *
 *              The DataSpace buffer is assumed to have sufficient space for
 *              the object.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyIsimpleToEsimple (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_OBJECT             *ExternalObject,
    UINT8                   *DataSpace,
    ACPI_SIZE               *BufferSpaceUsed)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (UtCopyIsimpleToEsimple);


    *BufferSpaceUsed = 0;

    /*
     * Check for NULL object case (could be an uninitialized
     * package element)
     */
    if (!InternalObject)
    {
        return_ACPI_STATUS (AE_OK);
    }

    /* Always clear the external object */

    ACPI_MEMSET (ExternalObject, 0, sizeof (ACPI_OBJECT));

    /*
     * In general, the external object will be the same type as
     * the internal object
     */
    ExternalObject->Type = ACPI_GET_OBJECT_TYPE (InternalObject);

    /* However, only a limited number of external types are supported */

    switch (ACPI_GET_OBJECT_TYPE (InternalObject))
    {
    case ACPI_TYPE_STRING:

        ExternalObject->String.Pointer = (char *) DataSpace;
        ExternalObject->String.Length  = InternalObject->String.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
                            (ACPI_SIZE) InternalObject->String.Length + 1);

        ACPI_MEMCPY ((void *) DataSpace,
            (void *) InternalObject->String.Pointer,
            (ACPI_SIZE) InternalObject->String.Length + 1);
        break;


    case ACPI_TYPE_BUFFER:

        ExternalObject->Buffer.Pointer = DataSpace;
        ExternalObject->Buffer.Length  = InternalObject->Buffer.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
                            InternalObject->String.Length);

        ACPI_MEMCPY ((void *) DataSpace,
            (void *) InternalObject->Buffer.Pointer,
            InternalObject->Buffer.Length);
        break;


    case ACPI_TYPE_INTEGER:

        ExternalObject->Integer.Value = InternalObject->Integer.Value;
        break;


    case ACPI_TYPE_LOCAL_REFERENCE:

        /*
         * This is an object reference.  Attempt to dereference it.
         */
        switch (InternalObject->Reference.Opcode)
        {
        case AML_INT_NAMEPATH_OP:

            /* For namepath, return the object handle ("reference") */

        default:
            /*
             * Use the object type of "Any" to indicate a reference
             * to object containing a handle to an ACPI named object.
             */
            ExternalObject->Type = ACPI_TYPE_ANY;
            ExternalObject->Reference.Handle = InternalObject->Reference.Node;
            break;
        }
        break;


    case ACPI_TYPE_PROCESSOR:

        ExternalObject->Processor.ProcId      = InternalObject->Processor.ProcId;
        ExternalObject->Processor.PblkAddress = InternalObject->Processor.Address;
        ExternalObject->Processor.PblkLength  = InternalObject->Processor.Length;
        break;


    case ACPI_TYPE_POWER:

        ExternalObject->PowerResource.SystemLevel =
                            InternalObject->PowerResource.SystemLevel;

        ExternalObject->PowerResource.ResourceOrder =
                            InternalObject->PowerResource.ResourceOrder;
        break;


    default:
        /*
         * There is no corresponding external object type
         */
        ACPI_ERROR ((AE_INFO, "Unsupported object type, cannot convert to external object: %s",
            AcpiUtGetTypeName (ACPI_GET_OBJECT_TYPE (InternalObject))));

        return_ACPI_STATUS (AE_SUPPORT);
    }

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIelementToEelement
 *
 * PARAMETERS:  ACPI_PKG_CALLBACK
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy one package element to another package element
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyIelementToEelement (
    UINT8                   ObjectType,
    ACPI_OPERAND_OBJECT     *SourceObject,
    ACPI_GENERIC_STATE      *State,
    void                    *Context)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_PKG_INFO           *Info = (ACPI_PKG_INFO *) Context;
    ACPI_SIZE               ObjectSpace;
    UINT32                  ThisIndex;
    ACPI_OBJECT             *TargetObject;


    ACPI_FUNCTION_ENTRY ();


    ThisIndex    = State->Pkg.Index;
    TargetObject = (ACPI_OBJECT *)
        &((ACPI_OBJECT *)(State->Pkg.DestObject))->Package.Elements[ThisIndex];

    switch (ObjectType)
    {
    case ACPI_COPY_TYPE_SIMPLE:

        /*
         * This is a simple or null object
         */
        Status = AcpiUtCopyIsimpleToEsimple (SourceObject,
                        TargetObject, Info->FreeSpace, &ObjectSpace);
        if (ACPI_FAILURE (Status))
        {