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

 *

 * Module Name: dsopcode - Dispatcher suport for regions and fields

 *

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

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

 *

 * 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 __DSOPCODE_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"

#include "actables.h"

#define _COMPONENT          ACPI_DISPATCHER

        ACPI_MODULE_NAME    ("dsopcode")

/* Local prototypes */

static ACPI_STATUS

AcpiDsInitBufferField (

    UINT16                  AmlOpcode,

    ACPI_OPERAND_OBJECT     *ObjDesc,

    ACPI_OPERAND_OBJECT     *BufferDesc,

    ACPI_OPERAND_OBJECT     *OffsetDesc,

    ACPI_OPERAND_OBJECT     *LengthDesc,

    ACPI_OPERAND_OBJECT     *ResultDesc);

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

 *

 * FUNCTION:    AcpiDsInitializeRegion

 *

 * PARAMETERS:  ObjHandle       - Region namespace node

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Front end to EvInitializeRegion

 *

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

ACPI_STATUS

AcpiDsInitializeRegion (

    ACPI_HANDLE             ObjHandle)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ObjDesc = AcpiNsGetAttachedObject (ObjHandle);

    /* Namespace is NOT locked */

    Status = AcpiEvInitializeRegion (ObjDesc, FALSE);

    return (Status);

}

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

 *

 * FUNCTION:    AcpiDsInitBufferField

 *

 * PARAMETERS:  AmlOpcode       - CreateXxxField

 *              ObjDesc         - BufferField object

 *              BufferDesc      - Host Buffer

 *              OffsetDesc      - Offset into buffer

 *              LengthDesc      - Length of field (CREATE_FIELD_OP only)

 *              ResultDesc      - Where to store the result

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Perform actual initialization of a buffer field

 *

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

static ACPI_STATUS

AcpiDsInitBufferField (

    UINT16                  AmlOpcode,

    ACPI_OPERAND_OBJECT     *ObjDesc,

    ACPI_OPERAND_OBJECT     *BufferDesc,

    ACPI_OPERAND_OBJECT     *OffsetDesc,

    ACPI_OPERAND_OBJECT     *LengthDesc,

    ACPI_OPERAND_OBJECT     *ResultDesc)

{

    UINT32                  Offset;

    UINT32                  BitOffset;

    UINT32                  BitCount;

    UINT8                   FieldFlags;

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE_PTR (DsInitBufferField, ObjDesc);

    /* Host object must be a Buffer */

    if (BufferDesc->Common.Type != ACPI_TYPE_BUFFER)

    {

        ACPI_ERROR ((AE_INFO,

            "Target of Create Field is not a Buffer object - %s",

            AcpiUtGetObjectTypeName (BufferDesc)));

        Status = AE_AML_OPERAND_TYPE;

        goto Cleanup;

    }

    /*

     * The last parameter to all of these opcodes (ResultDesc) started

     * out as a NameString, and should therefore now be a NS node

     * after resolution in AcpiExResolveOperands().

     */

    if (ACPI_GET_DESCRIPTOR_TYPE (ResultDesc) != ACPI_DESC_TYPE_NAMED)

    {

        ACPI_ERROR ((AE_INFO,

            "(%s) destination not a NS Node [%s]",

            AcpiPsGetOpcodeName (AmlOpcode),

            AcpiUtGetDescriptorName (ResultDesc)));

        Status = AE_AML_OPERAND_TYPE;

        goto Cleanup;

    }

    Offset = (UINT32) OffsetDesc->Integer.Value;

    /*

     * Setup the Bit offsets and counts, according to the opcode

     */

    switch (AmlOpcode)

    {

    case AML_CREATE_FIELD_OP:

        /* Offset is in bits, count is in bits */

        FieldFlags = AML_FIELD_ACCESS_BYTE;

        BitOffset  = Offset;

        BitCount   = (UINT32) LengthDesc->Integer.Value;

        /* Must have a valid (>0) bit count */

        if (BitCount == 0)

        {

            ACPI_ERROR ((AE_INFO,

                "Attempt to CreateField of length zero"));

            Status = AE_AML_OPERAND_VALUE;

            goto Cleanup;

        }

        break;

    case AML_CREATE_BIT_FIELD_OP:

        /* Offset is in bits, Field is one bit */

        BitOffset  = Offset;

        BitCount   = 1;

        FieldFlags = AML_FIELD_ACCESS_BYTE;

        break;

    case AML_CREATE_BYTE_FIELD_OP:

        /* Offset is in bytes, field is one byte */

        BitOffset  = 8 * Offset;

        BitCount   = 8;

        FieldFlags = AML_FIELD_ACCESS_BYTE;

        break;

    case AML_CREATE_WORD_FIELD_OP:

        /* Offset is in bytes, field is one word */

        BitOffset  = 8 * Offset;

        BitCount   = 16;

        FieldFlags = AML_FIELD_ACCESS_WORD;

        break;

    case AML_CREATE_DWORD_FIELD_OP:

        /* Offset is in bytes, field is one dword */

        BitOffset  = 8 * Offset;

        BitCount   = 32;

        FieldFlags = AML_FIELD_ACCESS_DWORD;

        break;

    case AML_CREATE_QWORD_FIELD_OP:

        /* Offset is in bytes, field is one qword */

        BitOffset  = 8 * Offset;

        BitCount   = 64;

        FieldFlags = AML_FIELD_ACCESS_QWORD;

        break;

    default:

        ACPI_ERROR ((AE_INFO,

            "Unknown field creation opcode 0x%02X",

            AmlOpcode));

        Status = AE_AML_BAD_OPCODE;

        goto Cleanup;

    }

    /* Entire field must fit within the current length of the buffer */

    if ((BitOffset + BitCount) >

        (8 * (UINT32) BufferDesc->Buffer.Length))

    {

        ACPI_ERROR ((AE_INFO,

            "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",

            AcpiUtGetNodeName (ResultDesc),

            BitOffset + BitCount,

            AcpiUtGetNodeName (BufferDesc->Buffer.Node),

            8 * (UINT32) BufferDesc->Buffer.Length));

        Status = AE_AML_BUFFER_LIMIT;

        goto Cleanup;

    }

    /*

     * Initialize areas of the field object that are common to all fields

     * For FieldFlags, use LOCK_RULE = 0 (NO_LOCK),

     * UPDATE_RULE = 0 (UPDATE_PRESERVE)

     */

    Status = AcpiExPrepCommonFieldObject (ObjDesc, FieldFlags, 0,

                                            BitOffset, BitCount);

    if (ACPI_FAILURE (Status))

    {

        goto Cleanup;

    }

    ObjDesc->BufferField.BufferObj = BufferDesc;

    /* Reference count for BufferDesc inherits ObjDesc count */

    BufferDesc->Common.ReferenceCount = (UINT16)

        (BufferDesc->Common.ReferenceCount + ObjDesc->Common.ReferenceCount);

Cleanup:

    /* Always delete the operands */

    AcpiUtRemoveReference (OffsetDesc);

    AcpiUtRemoveReference (BufferDesc);

    if (AmlOpcode == AML_CREATE_FIELD_OP)

    {

        AcpiUtRemoveReference (LengthDesc);

    }

    /* On failure, delete the result descriptor */

    if (ACPI_FAILURE (Status))

    {

        AcpiUtRemoveReference (ResultDesc);     /* Result descriptor */

    }

    else

    {

        /* Now the address and length are valid for this BufferField */

        ObjDesc->BufferField.Flags |= AOPOBJ_DATA_VALID;

    }

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsEvalBufferFieldOperands

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - A valid BufferField Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get BufferField Buffer and Index

 *              Called from AcpiDsExecEndOp during BufferField parse tree walk

 *

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

ACPI_STATUS

AcpiDsEvalBufferFieldOperands (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_FUNCTION_TRACE_PTR (DsEvalBufferFieldOperands, Op);

    /*

     * This is where we evaluate the address and length fields of the

     * CreateXxxField declaration

     */

    Node =  Op->Common.Node;

    /* NextOp points to the op that holds the Buffer */

    NextOp = Op->Common.Value.Arg;

    /* Evaluate/create the address and length operands */

    Status = AcpiDsCreateOperands (WalkState, NextOp);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    ObjDesc = AcpiNsGetAttachedObject (Node);

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    /* Resolve the operands */

    Status = AcpiExResolveOperands (Op->Common.AmlOpcode,

                    ACPI_WALK_OPERANDS, WalkState);

    if (ACPI_FAILURE (Status))

    {

        ACPI_ERROR ((AE_INFO, "(%s) bad operand(s), status 0x%X",

            AcpiPsGetOpcodeName (Op->Common.AmlOpcode), Status));

        return_ACPI_STATUS (Status);

    }

    /* Initialize the Buffer Field */

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

    {

        /* NOTE: Slightly different operands for this opcode */

        Status = AcpiDsInitBufferField (Op->Common.AmlOpcode, ObjDesc,

                    WalkState->Operands[0], WalkState->Operands[1],

                    WalkState->Operands[2], WalkState->Operands[3]);

    }

    else

    {

        /* All other, CreateXxxField opcodes */

        Status = AcpiDsInitBufferField (Op->Common.AmlOpcode, ObjDesc,

                    WalkState->Operands[0], WalkState->Operands[1],

                                      NULL, WalkState->Operands[2]);

    }

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsEvalRegionOperands

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - A valid region Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get region address and length

 *              Called from AcpiDsExecEndOp during OpRegion parse tree walk

 *

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

ACPI_STATUS

AcpiDsEvalRegionOperands (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_OPERAND_OBJECT     *OperandDesc;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_FUNCTION_TRACE_PTR (DsEvalRegionOperands, Op);

    /*

     * This is where we evaluate the address and length fields of the

     * OpRegion declaration

     */

    Node =  Op->Common.Node;

    /* NextOp points to the op that holds the SpaceID */

    NextOp = Op->Common.Value.Arg;

    /* NextOp points to address op */

    NextOp = NextOp->Common.Next;

    /* Evaluate/create the address and length operands */

    Status = AcpiDsCreateOperands (WalkState, NextOp);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Resolve the length and address operands to numbers */

    Status = AcpiExResolveOperands (Op->Common.AmlOpcode,

                ACPI_WALK_OPERANDS, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    ObjDesc = AcpiNsGetAttachedObject (Node);

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    /*

     * Get the length operand and save it

     * (at Top of stack)

     */

    OperandDesc = WalkState->Operands[WalkState->NumOperands - 1];

    ObjDesc->Region.Length = (UINT32) OperandDesc->Integer.Value;

    AcpiUtRemoveReference (OperandDesc);

    /*

     * Get the address and save it

     * (at top of stack - 1)

     */

    OperandDesc = WalkState->Operands[WalkState->NumOperands - 2];

    ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS)

                                OperandDesc->Integer.Value;

    AcpiUtRemoveReference (OperandDesc);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",

        ObjDesc,

        ACPI_FORMAT_NATIVE_UINT (ObjDesc->Region.Address),

        ObjDesc->Region.Length));

    /* Now the address and length are valid for this opregion */

    ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsEvalTableRegionOperands

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - A valid region Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get region address and length.

 *              Called from AcpiDsExecEndOp during DataTableRegion parse

 *              tree walk.

 *

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

ACPI_STATUS

AcpiDsEvalTableRegionOperands (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_OPERAND_OBJECT     **Operand;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_PARSE_OBJECT       *NextOp;

    UINT32                  TableIndex;

    ACPI_TABLE_HEADER       *Table;

    ACPI_FUNCTION_TRACE_PTR (DsEvalTableRegionOperands, Op);

    /*

     * This is where we evaluate the SignatureString and OemIDString

     * and OemTableIDString of the DataTableRegion declaration

     */

    Node =  Op->Common.Node;

    /* NextOp points to SignatureString op */

    NextOp = Op->Common.Value.Arg;

    /*

     * Evaluate/create the SignatureString and OemIDString

     * and OemTableIDString operands

     */

    Status = AcpiDsCreateOperands (WalkState, NextOp);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /*

     * Resolve the SignatureString and OemIDString

     * and OemTableIDString operands

     */

    Status = AcpiExResolveOperands (Op->Common.AmlOpcode,

                ACPI_WALK_OPERANDS, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    Operand = &WalkState->Operands[0];

    /* Find the ACPI table */

    Status = AcpiTbFindTable (Operand[0]->String.Pointer,

                Operand[1]->String.Pointer, Operand[2]->String.Pointer,

                &TableIndex);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    AcpiUtRemoveReference (Operand[0]);

    AcpiUtRemoveReference (Operand[1]);

    AcpiUtRemoveReference (Operand[2]);

    Status = AcpiGetTableByIndex (TableIndex, &Table);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    ObjDesc = AcpiNsGetAttachedObject (Node);

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS) ACPI_TO_INTEGER (Table);

    ObjDesc->Region.Length = Table->Length;

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",

        ObjDesc,

        ACPI_FORMAT_NATIVE_UINT (ObjDesc->Region.Address),

        ObjDesc->Region.Length));

    /* Now the address and length are valid for this opregion */

    ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsEvalDataObjectOperands

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - A valid DataObject Op object

 *              ObjDesc         - DataObject

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get the operands and complete the following data object types:

 *              Buffer, Package.

 *

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

ACPI_STATUS

AcpiDsEvalDataObjectOperands (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    ACPI_OPERAND_OBJECT     *ObjDesc)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ArgDesc;

    UINT32                  Length;

    ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands);

    /* The first operand (for all of these data objects) is the length */

    /*

     * Set proper index into operand stack for AcpiDsObjStackPush

     * invoked inside AcpiDsCreateOperand.

     */

    WalkState->OperandIndex = WalkState->NumOperands;

    Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    Status = AcpiExResolveOperands (WalkState->Opcode,

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

                    WalkState);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Extract length operand */

    ArgDesc = WalkState->Operands [WalkState->NumOperands - 1];

    Length = (UINT32) ArgDesc->Integer.Value;

    /* Cleanup for length operand */

    Status = AcpiDsObjStackPop (1, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    AcpiUtRemoveReference (ArgDesc);

    /*

     * Create the actual data object

     */

    switch (Op->Common.AmlOpcode)

    {

    case AML_BUFFER_OP:

        Status = AcpiDsBuildInternalBufferObj (WalkState, Op, Length, &ObjDesc);

        break;

    case AML_PACKAGE_OP:

    case AML_VAR_PACKAGE_OP:

        Status = AcpiDsBuildInternalPackageObj (WalkState, Op, Length, &ObjDesc);

        break;

    default:

        return_ACPI_STATUS (AE_AML_BAD_OPCODE);

    }

    if (ACPI_SUCCESS (Status))

    {

        /*

         * Return the object in the WalkState, unless the parent is a package -

         * in this case, the return object will be stored in the parse tree

         * for the package.

         */

        if ((!Op->Common.Parent) ||

            ((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) &&

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

             (Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP)))

        {

            WalkState->ResultObj = ObjDesc;

        }

    }

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsEvalBankFieldOperands

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - A valid BankField Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get BankField BankValue

 *              Called from AcpiDsExecEndOp during BankField parse tree walk

 *

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

ACPI_STATUS

AcpiDsEvalBankFieldOperands (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_OPERAND_OBJECT     *OperandDesc;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_PARSE_OBJECT       *Arg;

    ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);

    /*

     * This is where we evaluate the BankValue field of the

     * BankField declaration

     */

    /* NextOp points to the op that holds the Region */

    NextOp = Op->Common.Value.Arg;

    /* NextOp points to the op that holds the Bank Register */

    NextOp = NextOp->Common.Next;

    /* NextOp points to the op that holds the Bank Value */

    NextOp = NextOp->Common.Next;

    /*

     * Set proper index into operand stack for AcpiDsObjStackPush

     * invoked inside AcpiDsCreateOperand.

     *

     * We use WalkState->Operands[0] to store the evaluated BankValue

     */

    WalkState->OperandIndex = 0;

    Status = AcpiDsCreateOperand (WalkState, NextOp, 0);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

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

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,

        AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);

    /*

     * Get the BankValue operand and save it

     * (at Top of stack)

     */

    OperandDesc = WalkState->Operands[0];

    /* Arg points to the start Bank Field */

    Arg = AcpiPsGetArg (Op, 4);

    while (Arg)

    {

        /* Ignore OFFSET and ACCESSAS terms here */

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

        {

            Node = Arg->Common.Node;

            ObjDesc = AcpiNsGetAttachedObject (Node);

            if (!ObjDesc)

            {

                return_ACPI_STATUS (AE_NOT_EXIST);

            }

            ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;

        }

        /* Move to next field in the list */

        Arg = Arg->Common.Next;

    }

    AcpiUtRemoveReference (OperandDesc);

    return_ACPI_STATUS (Status);

}