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

 *

 * Module Name: dswexec - Dispatcher method execution callbacks;

 *                        dispatch to interpreter.

 *

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

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

 *

 * 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 __DSWEXEC_C__

#include "acpi.h"

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdispat.h"

#include "acinterp.h"

#include "acnamesp.h"

#include "acdebug.h"

#define _COMPONENT          ACPI_DISPATCHER

        ACPI_MODULE_NAME    ("dswexec")

/*

 * Dispatch table for opcode classes

 */

static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =

{

    AcpiExOpcode_0A_0T_1R,

    AcpiExOpcode_1A_0T_0R,

    AcpiExOpcode_1A_0T_1R,

    AcpiExOpcode_1A_1T_0R,

    AcpiExOpcode_1A_1T_1R,

    AcpiExOpcode_2A_0T_0R,

    AcpiExOpcode_2A_0T_1R,

    AcpiExOpcode_2A_1T_1R,

    AcpiExOpcode_2A_2T_1R,

    AcpiExOpcode_3A_0T_0R,

    AcpiExOpcode_3A_1T_1R,

    AcpiExOpcode_6A_0T_1R

};

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

 *

 * FUNCTION:    AcpiDsGetPredicateValue

 *

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

 *              ResultObj       - if non-zero, pop result from result stack

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get the result of a predicate evaluation

 *

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

ACPI_STATUS

AcpiDsGetPredicateValue (

    ACPI_WALK_STATE         *WalkState,

    ACPI_OPERAND_OBJECT     *ResultObj)

{

    ACPI_STATUS             Status = AE_OK;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;

    ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);

    WalkState->ControlState->Common.State = 0;

    if (ResultObj)

    {

        Status = AcpiDsResultPop (&ObjDesc, WalkState);

        if (ACPI_FAILURE (Status))

        {

            ACPI_EXCEPTION ((AE_INFO, Status,

                "Could not get result from predicate evaluation"));

            return_ACPI_STATUS (Status);

        }

    }

    else

    {

        Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

        Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

        ObjDesc = WalkState->Operands [0];

    }

    if (!ObjDesc)

    {

        ACPI_ERROR ((AE_INFO,

            "No predicate ObjDesc=%p State=%p",

            ObjDesc, WalkState));

        return_ACPI_STATUS (AE_AML_NO_OPERAND);

    }

    /*

     * Result of predicate evaluation must be an Integer

     * object. Implicitly convert the argument if necessary.

     */

    Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);

    if (ACPI_FAILURE (Status))

    {

        goto Cleanup;

    }

    if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)

    {

        ACPI_ERROR ((AE_INFO,

            "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",

            ObjDesc, WalkState, ObjDesc->Common.Type));

        Status = AE_AML_OPERAND_TYPE;

        goto Cleanup;

    }

    /* Truncate the predicate to 32-bits if necessary */

    AcpiExTruncateFor32bitTable (LocalObjDesc);

    /*

     * Save the result of the predicate evaluation on

     * the control stack

     */

    if (LocalObjDesc->Integer.Value)

    {

        WalkState->ControlState->Common.Value = TRUE;

    }

    else

    {

        /*

         * Predicate is FALSE, we will just toss the

         * rest of the package

         */

        WalkState->ControlState->Common.Value = FALSE;

        Status = AE_CTRL_FALSE;

    }

    /* Predicate can be used for an implicit return value */

    (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);

Cleanup:

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",

        WalkState->ControlState->Common.Value, WalkState->Op));

     /* Break to debugger to display result */

    ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (LocalObjDesc, WalkState));

    /*

     * Delete the predicate result object (we know that

     * we don't need it anymore)

     */

    if (LocalObjDesc != ObjDesc)

    {

        AcpiUtRemoveReference (LocalObjDesc);

    }

    AcpiUtRemoveReference (ObjDesc);

    WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsExecBeginOp

 *

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

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

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending callback used during the execution of control

 *              methods.  This is where most operators and operands are

 *              dispatched to the interpreter.

 *

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

ACPI_STATUS

AcpiDsExecBeginOp (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       **OutOp)

{

    ACPI_PARSE_OBJECT       *Op;

    ACPI_STATUS             Status = AE_OK;

    UINT32                  OpcodeClass;

    ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);

    Op = WalkState->Op;

    if (!Op)

    {

        Status = AcpiDsLoad2BeginOp (WalkState, OutOp);

        if (ACPI_FAILURE (Status))

        {

            goto ErrorExit;

        }

        Op = *OutOp;

        WalkState->Op = Op;

        WalkState->Opcode = Op->Common.AmlOpcode;

        WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

        if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

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

                AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));

            Status = AcpiDsScopeStackPop (WalkState);

            if (ACPI_FAILURE (Status))

            {

                goto ErrorExit;

            }

        }

    }

    if (Op == WalkState->Origin)

    {

        if (OutOp)

        {

            *OutOp = Op;

        }

        return_ACPI_STATUS (AE_OK);

    }

    /*

     * If the previous opcode was a conditional, this opcode

     * must be the beginning of the associated predicate.

     * Save this knowledge in the current scope descriptor

     */

    if ((WalkState->ControlState) &&

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

            ACPI_CONTROL_CONDITIONAL_EXECUTING))

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",

                        Op, WalkState));

        WalkState->ControlState->Common.State = ACPI_CONTROL_PREDICATE_EXECUTING;

        /* Save start of predicate */

        WalkState->ControlState->Control.PredicateOp = Op;

    }

    OpcodeClass = WalkState->OpInfo->Class;

    /* We want to send namepaths to the load code */

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

    {

        OpcodeClass = AML_CLASS_NAMED_OBJECT;

    }

    /*

     * Handle the opcode based upon the opcode type

     */

    switch (OpcodeClass)

    {

    case AML_CLASS_CONTROL:

        Status = AcpiDsExecBeginControlOp (WalkState, Op);

        break;

    case AML_CLASS_NAMED_OBJECT:

        if (WalkState->WalkType & ACPI_WALK_METHOD)

        {

            /*

             * Found a named object declaration during method execution;

             * we must enter this object into the namespace.  The created

             * object is temporary and will be deleted upon completion of

             * the execution of this method.

             *

             * Note 10/2010: Except for the Scope() op. This opcode does

             * not actually create a new object, it refers to an existing

             * object. However, for Scope(), we want to indeed open a

             * new scope.

             */

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

            {

                Status = AcpiDsLoad2BeginOp (WalkState, NULL);

            }

            else

            {

                Status = AcpiDsScopeStackPush (Op->Named.Node,

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

                if (ACPI_FAILURE (Status))

                {

                    return_ACPI_STATUS (Status);

                }

            }

        }

        break;

    case AML_CLASS_EXECUTE:

    case AML_CLASS_CREATE:

        break;

    default:

        break;

    }

    /* Nothing to do here during method execution */

    return_ACPI_STATUS (Status);

ErrorExit:

    Status = AcpiDsMethodError (Status, WalkState);

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsExecEndOp

 *

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

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback used during the execution of control

 *              methods.  The only thing we really need to do here is to

 *              notice the beginning of IF, ELSE, and WHILE blocks.

 *

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

ACPI_STATUS

AcpiDsExecEndOp (

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_PARSE_OBJECT       *Op;

    ACPI_STATUS             Status = AE_OK;

    UINT32                  OpType;

    UINT32                  OpClass;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_PARSE_OBJECT       *FirstArg;

    ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);

    Op      = WalkState->Op;

    OpType  = WalkState->OpInfo->Type;

    OpClass = WalkState->OpInfo->Class;

    if (OpClass == AML_CLASS_UNKNOWN)

    {

        ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));

        return_ACPI_STATUS (AE_NOT_IMPLEMENTED);

    }

    FirstArg = Op->Common.Value.Arg;

    /* Init the walk state */

    WalkState->NumOperands = 0;

    WalkState->OperandIndex = 0;

    WalkState->ReturnDesc = NULL;

    WalkState->ResultObj = NULL;

    /* Call debugger for single step support (DEBUG build only) */

    ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));

    ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});

    /* Decode the Opcode Class */

    switch (OpClass)

    {

    case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */

        if (WalkState->Opcode == AML_INT_NAMEPATH_OP)

        {

            Status = AcpiDsEvaluateNamePath (WalkState);

            if (ACPI_FAILURE (Status))

            {

                goto Cleanup;

            }

        }

        break;

    case AML_CLASS_EXECUTE:     /* Most operators with arguments */

        /* Build resolved operand stack */

        Status = AcpiDsCreateOperands (WalkState, FirstArg);

        if (ACPI_FAILURE (Status))

        {

            goto Cleanup;

        }

        /*

         * All opcodes require operand resolution, with the only exceptions

         * being the ObjectType and SizeOf operators.

         */

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

        {

            /* Resolve all operands */

            Status = AcpiExResolveOperands (WalkState->Opcode,

                        &(WalkState->Operands [WalkState->NumOperands -1]),

                        WalkState);

        }

        if (ACPI_SUCCESS (Status))

        {

            /*

             * Dispatch the request to the appropriate interpreter handler

             * routine.  There is one routine per opcode "type" based upon the

             * number of opcode arguments and return type.

             */

            Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);

        }

        else

        {

            /*

             * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the

             * Local is uninitialized.

             */

            if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&

                (WalkState->Opcode == AML_STORE_OP) &&

                (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&

                (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&

                (WalkState->Operands[0]->Reference.Class ==

                 WalkState->Operands[1]->Reference.Class) &&

                (WalkState->Operands[0]->Reference.Value ==

                 WalkState->Operands[1]->Reference.Value))

            {

                Status = AE_OK;

            }

            else

            {

                ACPI_EXCEPTION ((AE_INFO, Status,

                    "While resolving operands for [%s]",

                    AcpiPsGetOpcodeName (WalkState->Opcode)));

            }

        }

        /* Always delete the argument objects and clear the operand stack */

        AcpiDsClearOperands (WalkState);

        /*

         * If a result object was returned from above, push it on the

         * current result stack

         */

        if (ACPI_SUCCESS (Status) &&

            WalkState->ResultObj)

        {

            Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);

        }

        break;

    default:

        switch (OpType)

        {

        case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */

            /* 1 Operand, 0 ExternalResult, 0 InternalResult */

            Status = AcpiDsExecEndControlOp (WalkState, Op);

            break;

        case AML_TYPE_METHOD_CALL:

            /*

             * If the method is referenced from within a package

             * declaration, it is not a invocation of the method, just

             * a reference to it.

             */

            if ((Op->Asl.Parent) &&

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

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

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

                    "Method Reference in a Package, Op=%p\n", Op));

                Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node;

                AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);

                return_ACPI_STATUS (AE_OK);

            }

            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", Op));

            /*

             * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains

             * the method Node pointer

             */

            /* NextOp points to the op that holds the method name */

            NextOp = FirstArg;

            /* NextOp points to first argument op */

            NextOp = NextOp->Common.Next;

            /*

             * Get the method's arguments and put them on the operand stack

             */

            Status = AcpiDsCreateOperands (WalkState, NextOp);

            if (ACPI_FAILURE (Status))

            {

                break;

            }

            /*

             * Since the operands will be passed to another control method,

             * we must resolve all local references here (Local variables,

             * arguments to *this* method, etc.)

             */

            Status = AcpiDsResolveOperands (WalkState);

            if (ACPI_FAILURE (Status))

            {

                /* On error, clear all resolved operands */

                AcpiDsClearOperands (WalkState);

                break;

            }

            /*

             * Tell the walk loop to preempt this running method and

             * execute the new method

             */

            Status = AE_CTRL_TRANSFER;

            /*

             * Return now; we don't want to disturb anything,

             * especially the operand count!

             */

            return_ACPI_STATUS (Status);

        case AML_TYPE_CREATE_FIELD:

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                "Executing CreateField Buffer/Index Op=%p\n", Op));

            Status = AcpiDsLoad2EndOp (WalkState);

            if (ACPI_FAILURE (Status))

            {

                break;

            }

            Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);

            break;

        case AML_TYPE_CREATE_OBJECT:

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                "Executing CreateObject (Buffer/Package) Op=%p\n", Op));

            switch (Op->Common.Parent->Common.AmlOpcode)

            {

            case AML_NAME_OP:

                /*

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

                 * of this object)

                 */

                WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;

                WalkState->NumOperands = 1;

                Status = AcpiDsCreateNode (WalkState,

                            Op->Common.Parent->Common.Node,

                            Op->Common.Parent);

                if (ACPI_FAILURE (Status))

                {

                    break;

                }

                /* Fall through */

                /*lint -fallthrough */

            case AML_INT_EVAL_SUBTREE_OP:

                Status = AcpiDsEvalDataObjectOperands (WalkState, Op,

                            AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));

                break;

            default:

                Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);

                break;

            }

            /*

             * If a result object was returned from above, push it on the

             * current result stack

             */

            if (WalkState->ResultObj)

            {

                Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);

            }

            break;

        case AML_TYPE_NAMED_FIELD:

        case AML_TYPE_NAMED_COMPLEX:

        case AML_TYPE_NAMED_SIMPLE:

        case AML_TYPE_NAMED_NO_OBJ:

            Status = AcpiDsLoad2EndOp (WalkState);

            if (ACPI_FAILURE (Status))

            {

                break;

            }

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

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                    "Executing OpRegion Address/Length Op=%p\n", Op));

                Status = AcpiDsEvalRegionOperands (WalkState, Op);

                if (ACPI_FAILURE (Status))

                {

                    break;

                }

            }

            else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                    "Executing DataTableRegion Strings Op=%p\n", Op));

                Status = AcpiDsEvalTableRegionOperands (WalkState, Op);

                if (ACPI_FAILURE (Status))

                {

                    break;

                }

            }

            else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                    "Executing BankField Op=%p\n", Op));

                Status = AcpiDsEvalBankFieldOperands (WalkState, Op);

                if (ACPI_FAILURE (Status))

                {

                    break;

                }

            }

            break;

        case AML_TYPE_UNDEFINED:

            ACPI_ERROR ((AE_INFO,

                "Undefined opcode type Op=%p", Op));

            return_ACPI_STATUS (AE_NOT_IMPLEMENTED);

        case AML_TYPE_BOGUS:

            ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,

                "Internal opcode=%X type Op=%p\n",

                WalkState->Opcode, Op));

            break;

        default:

            ACPI_ERROR ((AE_INFO,

                "Unimplemented opcode, class=0x%X type=0x%X Opcode=-0x%X Op=%p",

                OpClass, OpType, Op->Common.AmlOpcode, Op));

            Status = AE_NOT_IMPLEMENTED;

            break;

        }

    }

    /*

     * ACPI 2.0 support for 64-bit integers: Truncate numeric

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

     */

    AcpiExTruncateFor32bitTable (WalkState->ResultObj);

    /*

     * Check if we just completed the evaluation of a

     * conditional predicate

     */

    if ((ACPI_SUCCESS (Status)) &&

        (WalkState->ControlState) &&

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

            ACPI_CONTROL_PREDICATE_EXECUTING) &&

        (WalkState->ControlState->Control.PredicateOp == Op))

    {

        Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);

        WalkState->ResultObj = NULL;

    }

Cleanup:

    if (WalkState->ResultObj)

    {

        /* Break to debugger to display result */

        ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,

                                WalkState));

        /*

         * Delete the result op if and only if:

         * Parent will not use the result -- such as any

         * non-nested type2 op in a method (parent will be method)

         */

        AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);

    }

#ifdef _UNDER_DEVELOPMENT

    if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)

    {

        AcpiDbMethodEnd (WalkState);

    }

#endif

    /* Invoke exception handler on error */

    if (ACPI_FAILURE (Status))

    {

        Status = AcpiDsMethodError (Status, WalkState);

    }

    /* Always clear the object stack */

    WalkState->NumOperands = 0;

    return_ACPI_STATUS (Status);

}