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/******************************************************************************

 *

 * Module Name: dsobject - Dispatcher object management routines

 *

 *****************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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 __DSOBJECT_C__

#include "acpi.h"

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdispat.h"

#include "acnamesp.h"

#include "acinterp.h"

#define _COMPONENT          ACPI_DISPATCHER

        ACPI_MODULE_NAME    ("dsobject")

/* Local prototypes */

static ACPI_STATUS

AcpiDsBuildInternalObject (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    ACPI_OPERAND_OBJECT     **ObjDescPtr);

#ifndef ACPI_NO_METHOD_EXECUTION

/*******************************************************************************

 *

 * FUNCTION:    AcpiDsBuildInternalObject

 *

 * PARAMETERS:  WalkState       - Current walk state

 *              Op              - Parser object to be translated

 *              ObjDescPtr      - Where the ACPI internal object is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object

 *              Simple objects are any objects other than a package object!

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDsBuildInternalObject (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    ACPI_OPERAND_OBJECT     **ObjDescPtr)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ACPI_OBJECT_TYPE        Type;

    ACPI_FUNCTION_TRACE (DsBuildInternalObject);

    *ObjDescPtr = NULL;

    if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)

    {

        /*

         * This is a named object reference. If this name was

         * previously looked up in the namespace, it was stored in this op.

         * Otherwise, go ahead and look it up now

         */

        if (!Op->Common.Node)

        {

            Status = AcpiNsLookup (WalkState->ScopeInfo,

                        Op->Common.Value.String,

                        ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,

                        ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,

                        ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node)));

            if (ACPI_FAILURE (Status))

            {

                /* Check if we are resolving a named reference within a package */

                if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) &&

                    ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||

                     (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))

                {

                    /*

                     * We didn't find the target and we are populating elements

                     * of a package - ignore if slack enabled. Some ASL code

                     * contains dangling invalid references in packages and

                     * expects that no exception will be issued. Leave the

                     * element as a null element. It cannot be used, but it

                     * can be overwritten by subsequent ASL code - this is

                     * typically the case.

                     */

                    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

                        "Ignoring unresolved reference in package [%4.4s]\n",

                        WalkState->ScopeInfo->Scope.Node->Name.Ascii));

                    return_ACPI_STATUS (AE_OK);

                }

                else

                {

                    ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status);

                }

                return_ACPI_STATUS (Status);

            }

        }

        /* Special object resolution for elements of a package */

        if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||

            (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))

        {

            /*

             * Attempt to resolve the node to a value before we insert it into

             * the package. If this is a reference to a common data type,

             * resolve it immediately. According to the ACPI spec, package

             * elements can only be "data objects" or method references.

             * Attempt to resolve to an Integer, Buffer, String or Package.

             * If cannot, return the named reference (for things like Devices,

             * Methods, etc.) Buffer Fields and Fields will resolve to simple

             * objects (int/buf/str/pkg).

             *

             * NOTE: References to things like Devices, Methods, Mutexes, etc.

             * will remain as named references. This behavior is not described

             * in the ACPI spec, but it appears to be an oversight.

             */

            ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Op->Common.Node);

            Status = AcpiExResolveNodeToValue (

                        ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc),

                        WalkState);

            if (ACPI_FAILURE (Status))

            {

                return_ACPI_STATUS (Status);

            }

            /*

             * Special handling for Alias objects. We need to setup the type

             * and the Op->Common.Node to point to the Alias target. Note,

             * Alias has at most one level of indirection internally.

             */

            Type = Op->Common.Node->Type;

            if (Type == ACPI_TYPE_LOCAL_ALIAS)

            {

                Type = ObjDesc->Common.Type;

                Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,

                    Op->Common.Node->Object);

            }

            switch (Type)

            {

            /*

             * For these types, we need the actual node, not the subobject.

             * However, the subobject did not get an extra reference count above.

             *

             * TBD: should ExResolveNodeToValue be changed to fix this?

             */

            case ACPI_TYPE_DEVICE:

            case ACPI_TYPE_THERMAL:

                AcpiUtAddReference (Op->Common.Node->Object);

                /*lint -fallthrough */

            /*

             * For these types, we need the actual node, not the subobject.

             * The subobject got an extra reference count in ExResolveNodeToValue.

             */

            case ACPI_TYPE_MUTEX:

            case ACPI_TYPE_METHOD:

            case ACPI_TYPE_POWER:

            case ACPI_TYPE_PROCESSOR:

            case ACPI_TYPE_EVENT:

            case ACPI_TYPE_REGION:

                /* We will create a reference object for these types below */

                break;

            default:

                /*

                 * All other types - the node was resolved to an actual

                 * object, we are done.

                 */

                goto Exit;

            }

        }

    }

    /* Create and init a new internal ACPI object */

    ObjDesc = AcpiUtCreateInternalObject (

                (AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode,

                &ObjDesc);

    if (ACPI_FAILURE (Status))

    {

        AcpiUtRemoveReference (ObjDesc);

        return_ACPI_STATUS (Status);

    }

Exit:

    *ObjDescPtr = ObjDesc;

    return_ACPI_STATUS (Status);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDsBuildInternalBufferObj

 *

 * PARAMETERS:  WalkState       - Current walk state

 *              Op              - Parser object to be translated

 *              BufferLength    - Length of the buffer

 *              ObjDescPtr      - Where the ACPI internal object is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Translate a parser Op package object to the equivalent

 *              namespace object

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDsBuildInternalBufferObj (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  BufferLength,

    ACPI_OPERAND_OBJECT     **ObjDescPtr)

{

    ACPI_PARSE_OBJECT       *Arg;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_PARSE_OBJECT       *ByteList;

    UINT32                  ByteListLength = 0;

    ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj);

    /*

     * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".

     * The buffer object already exists (from the NS node), otherwise it must

     * be created.

     */

    ObjDesc = *ObjDescPtr;

    if (!ObjDesc)

    {

        /* Create a new buffer object */

        ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);

        *ObjDescPtr = ObjDesc;

        if (!ObjDesc)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

    }

    /*

     * Second arg is the buffer data (optional) ByteList can be either

     * individual bytes or a string initializer.  In either case, a

     * ByteList appears in the AML.

     */

    Arg = Op->Common.Value.Arg;         /* skip first arg */

    ByteList = Arg->Named.Next;

    if (ByteList)

    {

        if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP)

        {

            ACPI_ERROR ((AE_INFO,

                "Expecting bytelist, found AML opcode 0x%X in op %p",

                ByteList->Common.AmlOpcode, ByteList));

            AcpiUtRemoveReference (ObjDesc);

            return (AE_TYPE);

        }

        ByteListLength = (UINT32) ByteList->Common.Value.Integer;

    }

    /*

     * The buffer length (number of bytes) will be the larger of:

     * 1) The specified buffer length and

     * 2) The length of the initializer byte list

     */

    ObjDesc->Buffer.Length = BufferLength;

    if (ByteListLength > BufferLength)

    {

        ObjDesc->Buffer.Length = ByteListLength;

    }

    /* Allocate the buffer */

    if (ObjDesc->Buffer.Length == 0)

    {

        ObjDesc->Buffer.Pointer = NULL;

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

            "Buffer defined with zero length in AML, creating\n"));

    }

    else

    {

        ObjDesc->Buffer.Pointer = ACPI_ALLOCATE_ZEROED (

                                        ObjDesc->Buffer.Length);

        if (!ObjDesc->Buffer.Pointer)

        {

            AcpiUtDeleteObjectDesc (ObjDesc);

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        /* Initialize buffer from the ByteList (if present) */

        if (ByteList)

        {

            ACPI_MEMCPY (ObjDesc->Buffer.Pointer, ByteList->Named.Data,

                         ByteListLength);

        }

    }

    ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;

    Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);

    return_ACPI_STATUS (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDsBuildInternalPackageObj

 *

 * PARAMETERS:  WalkState       - Current walk state

 *              Op              - Parser object to be translated

 *              ElementCount    - Number of elements in the package - this is

 *                                the NumElements argument to Package()

 *              ObjDescPtr      - Where the ACPI internal object is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Translate a parser Op package object to the equivalent

 *              namespace object

 *

 * NOTE: The number of elements in the package will be always be the NumElements

 * count, regardless of the number of elements in the package list. If

 * NumElements is smaller, only that many package list elements are used.

 * if NumElements is larger, the Package object is padded out with

 * objects of type Uninitialized (as per ACPI spec.)

 *

 * Even though the ASL compilers do not allow NumElements to be smaller

 * than the Package list length (for the fixed length package opcode), some

 * BIOS code modifies the AML on the fly to adjust the NumElements, and

 * this code compensates for that. This also provides compatibility with

 * other AML interpreters.

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDsBuildInternalPackageObj (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  ElementCount,

    ACPI_OPERAND_OBJECT     **ObjDescPtr)

{

    ACPI_PARSE_OBJECT       *Arg;

    ACPI_PARSE_OBJECT       *Parent;

    ACPI_OPERAND_OBJECT     *ObjDesc = NULL;

    ACPI_STATUS             Status = AE_OK;

    UINT32                  i;

    UINT16                  Index;

    UINT16                  ReferenceCount;

    ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj);

    /* Find the parent of a possibly nested package */

    Parent = Op->Common.Parent;

    while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||

           (Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))

    {

        Parent = Parent->Common.Parent;

    }

    /*

     * If we are evaluating a Named package object "Name (xxxx, Package)",

     * the package object already exists, otherwise it must be created.

     */

    ObjDesc = *ObjDescPtr;

    if (!ObjDesc)

    {

        ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);

        *ObjDescPtr = ObjDesc;

        if (!ObjDesc)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        ObjDesc->Package.Node = Parent->Common.Node;

    }

    /*

     * Allocate the element array (array of pointers to the individual

     * objects) based on the NumElements parameter. Add an extra pointer slot

     * so that the list is always null terminated.

     */

    ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED (

        ((ACPI_SIZE) ElementCount + 1) * sizeof (void *));

    if (!ObjDesc->Package.Elements)

    {

        AcpiUtDeleteObjectDesc (ObjDesc);

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    ObjDesc->Package.Count = ElementCount;

    /*

     * Initialize the elements of the package, up to the NumElements count.

     * Package is automatically padded with uninitialized (NULL) elements

     * if NumElements is greater than the package list length. Likewise,

     * Package is truncated if NumElements is less than the list length.

     */

    Arg = Op->Common.Value.Arg;

    Arg = Arg->Common.Next;

    for (i = 0; Arg && (i < ElementCount); i++)

    {

        if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)

        {

            if (Arg->Common.Node->Type == ACPI_TYPE_METHOD)

            {

                /*

                 * A method reference "looks" to the parser to be a method

                 * invocation, so we special case it here

                 */

                Arg->Common.AmlOpcode = AML_INT_NAMEPATH_OP;

                Status = AcpiDsBuildInternalObject (WalkState, Arg,

                            &ObjDesc->Package.Elements[i]);

            }

            else

            {

                /* This package element is already built, just get it */

                ObjDesc->Package.Elements[i] =

                    ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node);

            }

        }

        else

        {

            Status = AcpiDsBuildInternalObject (WalkState, Arg,

                        &ObjDesc->Package.Elements[i]);

        }

        if (*ObjDescPtr)

        {

            /* Existing package, get existing reference count */

            ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount;

            if (ReferenceCount > 1)

            {

                /* Make new element ref count match original ref count */

                for (Index = 0; Index < (ReferenceCount - 1); Index++)

                {

                    AcpiUtAddReference ((ObjDesc->Package.Elements[i]));

                }

            }

        }

        Arg = Arg->Common.Next;

    }

    /* Check for match between NumElements and actual length of PackageList */

    if (Arg)

    {

        /*

         * NumElements was exhausted, but there are remaining elements in the

         * PackageList. Truncate the package to NumElements.

         *

         * Note: technically, this is an error, from ACPI spec: "It is an error

         * for NumElements to be less than the number of elements in the

         * PackageList". However, we just print a message and

         * no exception is returned. This provides Windows compatibility. Some

         * BIOSs will alter the NumElements on the fly, creating this type

         * of ill-formed package object.

         */

        while (Arg)

        {

            /*

             * We must delete any package elements that were created earlier

             * and are not going to be used because of the package truncation.

             */

            if (Arg->Common.Node)

            {

                AcpiUtRemoveReference (

                    ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node));

                Arg->Common.Node = NULL;

            }

            /* Find out how many elements there really are */

            i++;

            Arg = Arg->Common.Next;

        }

        ACPI_INFO ((AE_INFO,

            "Actual Package length (%u) is larger than NumElements field (%u), truncated\n",

            i, ElementCount));

    }

    else if (i < ElementCount)

    {

        /*

         * Arg list (elements) was exhausted, but we did not reach NumElements count.

         * Note: this is not an error, the package is padded out with NULLs.

         */

        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

            "Package List length (%u) smaller than NumElements count (%u), padded with null elements\n",

            i, ElementCount));

    }

    ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;

    Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);

    return_ACPI_STATUS (Status);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDsCreateNode

 *

 * PARAMETERS:  WalkState       - Current walk state

 *              Node            - NS Node to be initialized

 *              Op              - Parser object to be translated

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create the object to be associated with a namespace node

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDsCreateNode (

    ACPI_WALK_STATE         *WalkState,

    ACPI_NAMESPACE_NODE     *Node,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_FUNCTION_TRACE_PTR (DsCreateNode, Op);

    /*

     * Because of the execution pass through the non-control-method

     * parts of the table, we can arrive here twice.  Only init

     * the named object node the first time through

     */

    if (AcpiNsGetAttachedObject (Node))

    {

        return_ACPI_STATUS (AE_OK);

    }

    if (!Op->Common.Value.Arg)

    {

        /* No arguments, there is nothing to do */

        return_ACPI_STATUS (AE_OK);

    }

    /* Build an internal object for the argument(s) */

    Status = AcpiDsBuildInternalObject (WalkState, Op->Common.Value.Arg,

                &ObjDesc);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Re-type the object according to its argument */

    Node->Type = ObjDesc->Common.Type;

    /* Attach obj to node */

    Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type);

    /* Remove local reference to the object */

    AcpiUtRemoveReference (ObjDesc);

    return_ACPI_STATUS (Status);

}

#endif /* ACPI_NO_METHOD_EXECUTION */

/*******************************************************************************

 *

 * FUNCTION:    AcpiDsInitObjectFromOp

 *

 * PARAMETERS:  WalkState       - Current walk state

 *              Op              - Parser op used to init the internal object

 *              Opcode          - AML opcode associated with the object

 *              RetObjDesc      - Namespace object to be initialized

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Initialize a namespace object from a parser Op and its

 *              associated arguments.  The namespace object is a more compact

 *              representation of the Op and its arguments.

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDsInitObjectFromOp (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    UINT16                  Opcode,

    ACPI_OPERAND_OBJECT     **RetObjDesc)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status = AE_OK;

    ACPI_FUNCTION_TRACE (DsInitObjectFromOp);

    ObjDesc = *RetObjDesc;

    OpInfo = AcpiPsGetOpcodeInfo (Opcode);

    if (OpInfo->Class == AML_CLASS_UNKNOWN)

    {

        /* Unknown opcode */

        return_ACPI_STATUS (AE_TYPE);

    }

    /* Perform per-object initialization */

    switch (ObjDesc->Common.Type)

    {

    case ACPI_TYPE_BUFFER:

        /*

         * Defer evaluation of Buffer TermArg operand

         */

        ObjDesc->Buffer.Node      = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,

                                        WalkState->Operands[0]);

        ObjDesc->Buffer.AmlStart  = Op->Named.Data;

        ObjDesc->Buffer.AmlLength = Op->Named.Length;

        break;

    case ACPI_TYPE_PACKAGE:

        /*

         * Defer evaluation of Package TermArg operand

         */

        ObjDesc->Package.Node      = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,

                                        WalkState->Operands[0]);

        ObjDesc->Package.AmlStart  = Op->Named.Data;

        ObjDesc->Package.AmlLength = Op->Named.Length;

        break;

    case ACPI_TYPE_INTEGER:

        switch (OpInfo->Type)

        {

        case AML_TYPE_CONSTANT:

            /*

             * Resolve AML Constants here - AND ONLY HERE!

             * All constants are integers.

             * We mark the integer with a flag that indicates that it started

             * life as a constant -- so that stores to constants will perform

             * as expected (noop). ZeroOp is used as a placeholder for optional

             * target operands.

             */

            ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;

            switch (Opcode)

            {

            case AML_ZERO_OP:

                ObjDesc->Integer.Value = 0;

                break;

            case AML_ONE_OP:

                ObjDesc->Integer.Value = 1;

                break;

            case AML_ONES_OP:

                ObjDesc->Integer.Value = ACPI_UINT64_MAX;

                /* Truncate value if we are executing from a 32-bit ACPI table */

#ifndef ACPI_NO_METHOD_EXECUTION

                AcpiExTruncateFor32bitTable (ObjDesc);

#endif

                break;

            case AML_REVISION_OP:

                ObjDesc->Integer.Value = ACPI_CA_VERSION;

                break;

            default:

                ACPI_ERROR ((AE_INFO,

                    "Unknown constant opcode 0x%X", Opcode));

                Status = AE_AML_OPERAND_TYPE;

                break;

            }

            break;

        case AML_TYPE_LITERAL:

            ObjDesc->Integer.Value = Op->Common.Value.Integer;

#ifndef ACPI_NO_METHOD_EXECUTION

            AcpiExTruncateFor32bitTable (ObjDesc);

#endif

            break;

        default:

            ACPI_ERROR ((AE_INFO, "Unknown Integer type 0x%X",

                OpInfo->Type));

            Status = AE_AML_OPERAND_TYPE;

            break;

        }

        break;

    case ACPI_TYPE_STRING:

        ObjDesc->String.Pointer = Op->Common.Value.String;

        ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String);

        /*

         * The string is contained in the ACPI table, don't ever try

         * to delete it

         */

        ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;

        break;

    case ACPI_TYPE_METHOD:

        break;

    case ACPI_TYPE_LOCAL_REFERENCE:

        switch (OpInfo->Type)

        {

        case AML_TYPE_LOCAL_VARIABLE:

            /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */

            ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_LOCAL_OP;

            ObjDesc->Reference.Class = ACPI_REFCLASS_LOCAL;

#ifndef ACPI_NO_METHOD_EXECUTION

            Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_LOCAL,

                        ObjDesc->Reference.Value, WalkState,

                        ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,

                            &ObjDesc->Reference.Object));

#endif

            break;

        case AML_TYPE_METHOD_ARGUMENT:

            /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */

            ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_ARG_OP;

            ObjDesc->Reference.Class = ACPI_REFCLASS_ARG;

#ifndef ACPI_NO_METHOD_EXECUTION

            Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_ARG,

                        ObjDesc->Reference.Value, WalkState,

                        ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,

                            &ObjDesc->Reference.Object));

#endif

            break;

        default: /* Object name or Debug object */

            switch (Op->Common.AmlOpcode)

            {

            case AML_INT_NAMEPATH_OP:

                /* Node was saved in Op */

                ObjDesc->Reference.Node = Op->Common.Node;

                ObjDesc->Reference.Object = Op->Common.Node->Object;

                ObjDesc->Reference.Class = ACPI_REFCLASS_NAME;

                break;

            case AML_DEBUG_OP:

                ObjDesc->Reference.Class = ACPI_REFCLASS_DEBUG;

                break;

            default:

                ACPI_ERROR ((AE_INFO,

                    "Unimplemented reference type for AML opcode: 0x%4.4X", Opcode));

                return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

            }

            break;

        }

        break;

    default:

        ACPI_ERROR ((AE_INFO, "Unimplemented data type: 0x%X",

            ObjDesc->Common.Type));

        Status = AE_AML_OPERAND_TYPE;

        break;

    }

    return_ACPI_STATUS (Status);

}