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

 *

 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks

 *

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

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

 *

 * 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 __DSWLOAD2_C__

#include "acpi.h"

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdispat.h"

#include "acinterp.h"

#include "acnamesp.h"

#include "acevents.h"

#define _COMPONENT          ACPI_DISPATCHER

        ACPI_MODULE_NAME    ("dswload2")

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

 *

 * FUNCTION:    AcpiDsLoad2BeginOp

 *

 * PARAMETERS:  WalkState       - Current state of the parse tree walk

 *              OutOp           - Wher to return op if a new one is created

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending callback used during the loading of ACPI tables.

 *

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

ACPI_STATUS

AcpiDsLoad2BeginOp (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       **OutOp)

{

    ACPI_PARSE_OBJECT       *Op;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_STATUS             Status;

    ACPI_OBJECT_TYPE        ObjectType;

    char                    *BufferPtr;

    UINT32                  Flags;

    ACPI_FUNCTION_TRACE (DsLoad2BeginOp);

    Op = WalkState->Op;

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));

    if (Op)

    {

        if ((WalkState->ControlState) &&

            (WalkState->ControlState->Common.State ==

                ACPI_CONTROL_CONDITIONAL_EXECUTING))

        {

            /* We are executing a while loop outside of a method */

            Status = AcpiDsExecBeginOp (WalkState, OutOp);

            return_ACPI_STATUS (Status);

        }

        /* We only care about Namespace opcodes here */

        if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE)   &&

              (WalkState->Opcode != AML_INT_NAMEPATH_OP)) ||

            (!(WalkState->OpInfo->Flags & AML_NAMED)))

        {

            return_ACPI_STATUS (AE_OK);

        }

        /* Get the name we are going to enter or lookup in the namespace */

        if (WalkState->Opcode == AML_INT_NAMEPATH_OP)

        {

            /* For Namepath op, get the path string */

            BufferPtr = Op->Common.Value.String;

            if (!BufferPtr)

            {

                /* No name, just exit */

                return_ACPI_STATUS (AE_OK);

            }

        }

        else

        {

            /* Get name from the op */

            BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name);

        }

    }

    else

    {

        /* Get the namestring from the raw AML */

        BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState);

    }

    /* Map the opcode into an internal object type */

    ObjectType = WalkState->OpInfo->ObjectType;

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

        "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType));

    switch (WalkState->Opcode)

    {

    case AML_FIELD_OP:

    case AML_BANK_FIELD_OP:

    case AML_INDEX_FIELD_OP:

        Node = NULL;

        Status = AE_OK;

        break;

    case AML_INT_NAMEPATH_OP:

        /*

         * The NamePath is an object reference to an existing object.

         * Don't enter the name into the namespace, but look it up

         * for use later.

         */

        Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,

                        ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,

                        WalkState, &(Node));

        break;

    case AML_SCOPE_OP:

        /* Special case for Scope(\) -> refers to the Root node */

        if (Op && (Op->Named.Node == AcpiGbl_RootNode))

        {

            Node = Op->Named.Node;

            Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);

            if (ACPI_FAILURE (Status))

            {

                return_ACPI_STATUS (Status);

            }

        }

        else

        {

            /*

             * The Path is an object reference to an existing object.

             * Don't enter the name into the namespace, but look it up

             * for use later.

             */

            Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,

                        ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,

                        WalkState, &(Node));

            if (ACPI_FAILURE (Status))

            {

#ifdef ACPI_ASL_COMPILER

                if (Status == AE_NOT_FOUND)

                {

                    Status = AE_OK;

                }

                else

                {

                    ACPI_ERROR_NAMESPACE (BufferPtr, Status);

                }

#else

                ACPI_ERROR_NAMESPACE (BufferPtr, Status);

#endif

                return_ACPI_STATUS (Status);

            }

        }

        /*

         * We must check to make sure that the target is

         * one of the opcodes that actually opens a scope

         */

        switch (Node->Type)

        {

        case ACPI_TYPE_ANY:

        case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */

        case ACPI_TYPE_DEVICE:

        case ACPI_TYPE_POWER:

        case ACPI_TYPE_PROCESSOR:

        case ACPI_TYPE_THERMAL:

            /* These are acceptable types */

            break;

        case ACPI_TYPE_INTEGER:

        case ACPI_TYPE_STRING:

        case ACPI_TYPE_BUFFER:

            /*

             * These types we will allow, but we will change the type.

             * This enables some existing code of the form:

             *

             *  Name (DEB, 0)

             *  Scope (DEB) { ... }

             */

            ACPI_WARNING ((AE_INFO,

                "Type override - [%4.4s] had invalid type (%s) "

                "for Scope operator, changed to type ANY\n",

                AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));

            Node->Type = ACPI_TYPE_ANY;

            WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;

            break;

        default:

            /* All other types are an error */

            ACPI_ERROR ((AE_INFO,

                "Invalid type (%s) for target of "

                "Scope operator [%4.4s] (Cannot override)",

                AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));

            return (AE_AML_OPERAND_TYPE);

        }

        break;

    default:

        /* All other opcodes */

        if (Op && Op->Common.Node)

        {

            /* This op/node was previously entered into the namespace */

            Node = Op->Common.Node;

            if (AcpiNsOpensScope (ObjectType))

            {

                Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);

                if (ACPI_FAILURE (Status))

                {

                    return_ACPI_STATUS (Status);

                }

            }

            return_ACPI_STATUS (AE_OK);

        }

        /*

         * Enter the named type into the internal namespace. We enter the name

         * as we go downward in the parse tree. Any necessary subobjects that

         * involve arguments to the opcode must be created as we go back up the

         * parse tree later.

         *

         * Note: Name may already exist if we are executing a deferred opcode.

         */

        if (WalkState->DeferredNode)

        {

            /* This name is already in the namespace, get the node */

            Node = WalkState->DeferredNode;

            Status = AE_OK;

            break;

        }

        Flags = ACPI_NS_NO_UPSEARCH;

        if (WalkState->PassNumber == ACPI_IMODE_EXECUTE)

        {

            /* Execution mode, node cannot already exist, node is temporary */

            Flags |= ACPI_NS_ERROR_IF_FOUND;

            if (!(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))

            {

                Flags |= ACPI_NS_TEMPORARY;

            }

        }

        /* Add new entry or lookup existing entry */

        Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,

                    ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node);

        if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY))

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

                "***New Node [%4.4s] %p is temporary\n",

                AcpiUtGetNodeName (Node), Node));

        }

        break;

    }

    if (ACPI_FAILURE (Status))

    {

        ACPI_ERROR_NAMESPACE (BufferPtr, Status);

        return_ACPI_STATUS (Status);

    }

    if (!Op)

    {

        /* Create a new op */

        Op = AcpiPsAllocOp (WalkState->Opcode);

        if (!Op)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        /* Initialize the new op */

        if (Node)

        {

            Op->Named.Name = Node->Name.Integer;

        }

        *OutOp = Op;

    }

    /*

     * Put the Node in the "op" object that the parser uses, so we

     * can get it again quickly when this scope is closed

     */

    Op->Common.Node = Node;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsLoad2EndOp

 *

 * PARAMETERS:  WalkState       - Current state of the parse tree walk

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback used during the loading of the namespace,

 *              both control methods and everything else.

 *

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

ACPI_STATUS

AcpiDsLoad2EndOp (

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_PARSE_OBJECT       *Op;

    ACPI_STATUS             Status = AE_OK;

    ACPI_OBJECT_TYPE        ObjectType;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_PARSE_OBJECT       *Arg;

    ACPI_NAMESPACE_NODE     *NewNode;

#ifndef ACPI_NO_METHOD_EXECUTION

    UINT32                  i;

    UINT8                   RegionSpace;

#endif

    ACPI_FUNCTION_TRACE (DsLoad2EndOp);

    Op = WalkState->Op;

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",

            WalkState->OpInfo->Name, Op, WalkState));

    /* Check if opcode had an associated namespace object */

    if (!(WalkState->OpInfo->Flags & AML_NSOBJECT))

    {

        return_ACPI_STATUS (AE_OK);

    }

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

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

            "Ending scope Op=%p State=%p\n", Op, WalkState));

    }

    ObjectType = WalkState->OpInfo->ObjectType;

    /*

     * Get the Node/name from the earlier lookup

     * (It was saved in the *op structure)

     */

    Node = Op->Common.Node;

    /*

     * Put the Node on the object stack (Contains the ACPI Name of

     * this object)

     */

    WalkState->Operands[0] = (void *) Node;

    WalkState->NumOperands = 1;

    /* Pop the scope stack */

    if (AcpiNsOpensScope (ObjectType) &&

       (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP))

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",

            AcpiUtGetTypeName (ObjectType), Op));

        Status = AcpiDsScopeStackPop (WalkState);

        if (ACPI_FAILURE (Status))

        {

            goto Cleanup;

        }

    }

    /*

     * Named operations are as follows:

     *

     * AML_ALIAS

     * AML_BANKFIELD

     * AML_CREATEBITFIELD

     * AML_CREATEBYTEFIELD

     * AML_CREATEDWORDFIELD

     * AML_CREATEFIELD

     * AML_CREATEQWORDFIELD

     * AML_CREATEWORDFIELD

     * AML_DATA_REGION

     * AML_DEVICE

     * AML_EVENT

     * AML_FIELD

     * AML_INDEXFIELD

     * AML_METHOD

     * AML_METHODCALL

     * AML_MUTEX

     * AML_NAME

     * AML_NAMEDFIELD

     * AML_OPREGION

     * AML_POWERRES

     * AML_PROCESSOR

     * AML_SCOPE

     * AML_THERMALZONE

     */

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

        "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",

        AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node));

    /* Decode the opcode */

    Arg = Op->Common.Value.Arg;

    switch (WalkState->OpInfo->Type)

    {

#ifndef ACPI_NO_METHOD_EXECUTION

    case AML_TYPE_CREATE_FIELD:

        /*

         * Create the field object, but the field buffer and index must

         * be evaluated later during the execution phase

         */

        Status = AcpiDsCreateBufferField (Op, WalkState);

        break;

     case AML_TYPE_NAMED_FIELD:

        /*

         * If we are executing a method, initialize the field

         */

        if (WalkState->MethodNode)

        {

            Status = AcpiDsInitFieldObjects (Op, WalkState);

        }

        switch (Op->Common.AmlOpcode)

        {

        case AML_INDEX_FIELD_OP:

            Status = AcpiDsCreateIndexField (Op, (ACPI_HANDLE) Arg->Common.Node,

                        WalkState);

            break;

        case AML_BANK_FIELD_OP:

            Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState);

            break;

        case AML_FIELD_OP:

            Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState);

            break;

        default:

            /* All NAMED_FIELD opcodes must be handled above */

            break;

        }

        break;

     case AML_TYPE_NAMED_SIMPLE:

        Status = AcpiDsCreateOperands (WalkState, Arg);

        if (ACPI_FAILURE (Status))

        {

            goto Cleanup;

        }

        switch (Op->Common.AmlOpcode)

        {

        case AML_PROCESSOR_OP:

            Status = AcpiExCreateProcessor (WalkState);

            break;

        case AML_POWER_RES_OP:

            Status = AcpiExCreatePowerResource (WalkState);

            break;

        case AML_MUTEX_OP:

            Status = AcpiExCreateMutex (WalkState);

            break;

        case AML_EVENT_OP:

            Status = AcpiExCreateEvent (WalkState);

            break;

        case AML_ALIAS_OP:

            Status = AcpiExCreateAlias (WalkState);

            break;

        default:

            /* Unknown opcode */

            Status = AE_OK;

            goto Cleanup;

        }

        /* Delete operands */

        for (i = 1; i < WalkState->NumOperands; i++)

        {

            AcpiUtRemoveReference (WalkState->Operands[i]);

            WalkState->Operands[i] = NULL;

        }

        break;

#endif /* ACPI_NO_METHOD_EXECUTION */

    case AML_TYPE_NAMED_COMPLEX:

        switch (Op->Common.AmlOpcode)

        {

#ifndef ACPI_NO_METHOD_EXECUTION

        case AML_REGION_OP:

        case AML_DATA_REGION_OP:

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

            {

                RegionSpace = (ACPI_ADR_SPACE_TYPE)

                      ((Op->Common.Value.Arg)->Common.Value.Integer);

            }

            else

            {

                RegionSpace = ACPI_ADR_SPACE_DATA_TABLE;

            }

            /*

             * The OpRegion is not fully parsed at this time. The only valid

             * argument is the SpaceId. (We must save the address of the

             * AML of the address and length operands)

             *

             * If we have a valid region, initialize it. The namespace is

             * unlocked at this point.

             *

             * Need to unlock interpreter if it is locked (if we are running

             * a control method), in order to allow _REG methods to be run

             * during AcpiEvInitializeRegion.

             */

            if (WalkState->MethodNode)

            {

                /*

                 * Executing a method: initialize the region and unlock

                 * the interpreter

                 */

                Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,

                            RegionSpace, WalkState);

                if (ACPI_FAILURE (Status))

                {

                    return (Status);

                }

                AcpiExExitInterpreter ();

            }

            Status = AcpiEvInitializeRegion (AcpiNsGetAttachedObject (Node),

                        FALSE);

            if (WalkState->MethodNode)

            {

                AcpiExEnterInterpreter ();

            }

            if (ACPI_FAILURE (Status))

            {

                /*

                 *  If AE_NOT_EXIST is returned, it is not fatal

                 *  because many regions get created before a handler

                 *  is installed for said region.

                 */

                if (AE_NOT_EXIST == Status)

                {

                    Status = AE_OK;

                }

            }

            break;

        case AML_NAME_OP:

            Status = AcpiDsCreateNode (WalkState, Node, Op);

            break;

        case AML_METHOD_OP:

            /*

             * MethodOp PkgLength NameString MethodFlags TermList

             *

             * Note: We must create the method node/object pair as soon as we

             * see the method declaration. This allows later pass1 parsing

             * of invocations of the method (need to know the number of

             * arguments.)

             */

            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

                "LOADING-Method: State=%p Op=%p NamedObj=%p\n",

                WalkState, Op, Op->Named.Node));

            if (!AcpiNsGetAttachedObject (Op->Named.Node))

            {

                WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);

                WalkState->NumOperands = 1;

                Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);

                if (ACPI_SUCCESS (Status))

                {

                    Status = AcpiExCreateMethod (Op->Named.Data,

                                        Op->Named.Length, WalkState);

                }

                WalkState->Operands[0] = NULL;

                WalkState->NumOperands = 0;

                if (ACPI_FAILURE (Status))

                {

                    return_ACPI_STATUS (Status);

                }

            }

            break;

#endif /* ACPI_NO_METHOD_EXECUTION */

        default:

            /* All NAMED_COMPLEX opcodes must be handled above */

            break;

        }

        break;

    case AML_CLASS_INTERNAL:

        /* case AML_INT_NAMEPATH_OP: */

        break;

    case AML_CLASS_METHOD_CALL:

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

            "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",

            WalkState, Op, Node));

        /*

         * Lookup the method name and save the Node

         */

        Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,

                        ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,

                        ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,

                        WalkState, &(NewNode));

        if (ACPI_SUCCESS (Status))

        {

            /*

             * Make sure that what we found is indeed a method

             * We didn't search for a method on purpose, to see if the name

             * would resolve

             */

            if (NewNode->Type != ACPI_TYPE_METHOD)

            {

                Status = AE_AML_OPERAND_TYPE;

            }

            /* We could put the returned object (Node) on the object stack for

             * later, but for now, we will put it in the "op" object that the

             * parser uses, so we can get it again at the end of this scope

             */

            Op->Common.Node = NewNode;

        }

        else

        {

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

        }

        break;

    default:

        break;

    }

Cleanup:

    /* Remove the Node pushed at the very beginning */

    WalkState->Operands[0] = NULL;

    WalkState->NumOperands = 0;

    return_ACPI_STATUS (Status);

}