Subversion Repositories Kolibri OS

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

 *

 * Module Name: dsmthdat - control method arguments and local variables

 *

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

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

 *

 * 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 __DSMTHDAT_C__

#include "acpi.h"

#include "accommon.h"

#include "acdispat.h"

#include "acnamesp.h"

#include "acinterp.h"

#define _COMPONENT          ACPI_DISPATCHER

        ACPI_MODULE_NAME    ("dsmthdat")

/* Local prototypes */

static void

AcpiDsMethodDataDeleteValue (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState);

static ACPI_STATUS

AcpiDsMethodDataSetValue (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_OPERAND_OBJECT     *Object,

    ACPI_WALK_STATE         *WalkState);

#ifdef ACPI_OBSOLETE_FUNCTIONS

ACPI_OBJECT_TYPE

AcpiDsMethodDataGetType (

    UINT16                  Opcode,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState);

#endif

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

 *

 * FUNCTION:    AcpiDsMethodDataInit

 *

 * PARAMETERS:  WalkState           - Current walk state object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Initialize the data structures that hold the method's arguments

 *              and locals.  The data struct is an array of namespace nodes for

 *              each - this allows RefOf and DeRefOf to work properly for these

 *              special data types.

 *

 * NOTES:       WalkState fields are initialized to zero by the

 *              ACPI_ALLOCATE_ZEROED().

 *

 *              A pseudo-Namespace Node is assigned to each argument and local

 *              so that RefOf() can return a pointer to the Node.

 *

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

void

AcpiDsMethodDataInit (

    ACPI_WALK_STATE         *WalkState)

{

    UINT32                  i;

    ACPI_FUNCTION_TRACE (DsMethodDataInit);

    /* Init the method arguments */

    for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)

    {

        ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name, NAMEOF_ARG_NTE);

        WalkState->Arguments[i].Name.Integer |= (i << 24);

        WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED;

        WalkState->Arguments[i].Type = ACPI_TYPE_ANY;

        WalkState->Arguments[i].Flags = ANOBJ_METHOD_ARG;

    }

    /* Init the method locals */

    for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)

    {

        ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name, NAMEOF_LOCAL_NTE);

        WalkState->LocalVariables[i].Name.Integer |= (i << 24);

        WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED;

        WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY;

        WalkState->LocalVariables[i].Flags = ANOBJ_METHOD_LOCAL;

    }

    return_VOID;

}

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

 *

 * FUNCTION:    AcpiDsMethodDataDeleteAll

 *

 * PARAMETERS:  WalkState           - Current walk state object

 *

 * RETURN:      None

 *

 * DESCRIPTION: Delete method locals and arguments.  Arguments are only

 *              deleted if this method was called from another method.

 *

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

void

AcpiDsMethodDataDeleteAll (

    ACPI_WALK_STATE         *WalkState)

{

    UINT32                  Index;

    ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll);

    /* Detach the locals */

    for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++)

    {

        if (WalkState->LocalVariables[Index].Object)

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%u=%p\n",

                    Index, WalkState->LocalVariables[Index].Object));

            /* Detach object (if present) and remove a reference */

            AcpiNsDetachObject (&WalkState->LocalVariables[Index]);

        }

    }

    /* Detach the arguments */

    for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++)

    {

        if (WalkState->Arguments[Index].Object)

        {

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%u=%p\n",

                    Index, WalkState->Arguments[Index].Object));

            /* Detach object (if present) and remove a reference */

            AcpiNsDetachObject (&WalkState->Arguments[Index]);

        }

    }

    return_VOID;

}

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

 *

 * FUNCTION:    AcpiDsMethodDataInitArgs

 *

 * PARAMETERS:  *Params         - Pointer to a parameter list for the method

 *              MaxParamCount   - The arg count for this method

 *              WalkState       - Current walk state object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Initialize arguments for a method.  The parameter list is a list

 *              of ACPI operand objects, either null terminated or whose length

 *              is defined by MaxParamCount.

 *

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

ACPI_STATUS

AcpiDsMethodDataInitArgs (

    ACPI_OPERAND_OBJECT     **Params,

    UINT32                  MaxParamCount,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    UINT32                  Index = 0;

    ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params);

    if (!Params)

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param list passed to method\n"));

        return_ACPI_STATUS (AE_OK);

    }

    /* Copy passed parameters into the new method stack frame */

    while ((Index < ACPI_METHOD_NUM_ARGS) &&

           (Index < MaxParamCount)        &&

            Params[Index])

    {

        /*

         * A valid parameter.

         * Store the argument in the method/walk descriptor.

         * Do not copy the arg in order to implement call by reference

         */

        Status = AcpiDsMethodDataSetValue (ACPI_REFCLASS_ARG, Index,

                    Params[Index], WalkState);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

        Index++;

    }

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%u args passed to method\n", Index));

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiDsMethodDataGetNode

 *

 * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or

 *                                    ACPI_REFCLASS_ARG

 *              Index               - Which Local or Arg whose type to get

 *              WalkState           - Current walk state object

 *              Node                - Where the node is returned.

 *

 * RETURN:      Status and node

 *

 * DESCRIPTION: Get the Node associated with a local or arg.

 *

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

ACPI_STATUS

AcpiDsMethodDataGetNode (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState,

    ACPI_NAMESPACE_NODE     **Node)

{

    ACPI_FUNCTION_TRACE (DsMethodDataGetNode);

    /*

     * Method Locals and Arguments are supported

     */

    switch (Type)

    {

    case ACPI_REFCLASS_LOCAL:

        if (Index > ACPI_METHOD_MAX_LOCAL)

        {

            ACPI_ERROR ((AE_INFO,

                "Local index %u is invalid (max %u)",

                Index, ACPI_METHOD_MAX_LOCAL));

            return_ACPI_STATUS (AE_AML_INVALID_INDEX);

        }

        /* Return a pointer to the pseudo-node */

        *Node = &WalkState->LocalVariables[Index];

        break;

    case ACPI_REFCLASS_ARG:

        if (Index > ACPI_METHOD_MAX_ARG)

        {

            ACPI_ERROR ((AE_INFO,

                "Arg index %u is invalid (max %u)",

                Index, ACPI_METHOD_MAX_ARG));

            return_ACPI_STATUS (AE_AML_INVALID_INDEX);

        }

        /* Return a pointer to the pseudo-node */

        *Node = &WalkState->Arguments[Index];

        break;

    default:

        ACPI_ERROR ((AE_INFO, "Type %u is invalid", Type));

        return_ACPI_STATUS (AE_TYPE);

    }

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiDsMethodDataSetValue

 *

 * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or

 *                                    ACPI_REFCLASS_ARG

 *              Index               - Which Local or Arg to get

 *              Object              - Object to be inserted into the stack entry

 *              WalkState           - Current walk state object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.

 *              Note: There is no "implicit conversion" for locals.

 *

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

static ACPI_STATUS

AcpiDsMethodDataSetValue (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_OPERAND_OBJECT     *Object,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_FUNCTION_TRACE (DsMethodDataSetValue);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

        "NewObj %p Type %2.2X, Refs=%u [%s]\n", Object,

        Type, Object->Common.ReferenceCount,

        AcpiUtGetTypeName (Object->Common.Type)));

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /*

     * Increment ref count so object can't be deleted while installed.

     * NOTE: We do not copy the object in order to preserve the call by

     * reference semantics of ACPI Control Method invocation.

     * (See ACPI Specification 2.0C)

     */

    AcpiUtAddReference (Object);

    /* Install the object */

    Node->Object = Object;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiDsMethodDataGetValue

 *

 * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or

 *                                    ACPI_REFCLASS_ARG

 *              Index               - Which localVar or argument to get

 *              WalkState           - Current walk state object

 *              DestDesc            - Where Arg or Local value is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Retrieve value of selected Arg or Local for this method

 *              Used only in AcpiExResolveToValue().

 *

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

ACPI_STATUS

AcpiDsMethodDataGetValue (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState,

    ACPI_OPERAND_OBJECT     **DestDesc)

{

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_OPERAND_OBJECT     *Object;

    ACPI_FUNCTION_TRACE (DsMethodDataGetValue);

    /* Validate the object descriptor */

    if (!DestDesc)

    {

        ACPI_ERROR ((AE_INFO, "Null object descriptor pointer"));

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Get the object from the node */

    Object = Node->Object;

    /* Examine the returned object, it must be valid. */

    if (!Object)

    {

        /*

         * Index points to uninitialized object.

         * This means that either 1) The expected argument was

         * not passed to the method, or 2) A local variable

         * was referenced by the method (via the ASL)

         * before it was initialized.  Either case is an error.

         */

        /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */

        if (AcpiGbl_EnableInterpreterSlack)

        {

            Object = AcpiUtCreateIntegerObject ((UINT64) 0);

            if (!Object)

            {

                return_ACPI_STATUS (AE_NO_MEMORY);

            }

            Node->Object = Object;

        }

        /* Otherwise, return the error */

        else switch (Type)

        {

        case ACPI_REFCLASS_ARG:

            ACPI_ERROR ((AE_INFO,

                "Uninitialized Arg[%u] at node %p",

                Index, Node));

            return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);

        case ACPI_REFCLASS_LOCAL:

            /*

             * No error message for this case, will be trapped again later to

             * detect and ignore cases of Store(LocalX,LocalX)

             */

            return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);

        default:

            ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X", Type));

            return_ACPI_STATUS (AE_AML_INTERNAL);

        }

    }

    /*

     * The Index points to an initialized and valid object.

     * Return an additional reference to the object

     */

    *DestDesc = Object;

    AcpiUtAddReference (Object);

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiDsMethodDataDeleteValue

 *

 * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or

 *                                    ACPI_REFCLASS_ARG

 *              Index               - Which localVar or argument to delete

 *              WalkState           - Current walk state object

 *

 * RETURN:      None

 *

 * DESCRIPTION: Delete the entry at Opcode:Index.  Inserts

 *              a null into the stack slot after the object is deleted.

 *

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

static void

AcpiDsMethodDataDeleteValue (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_OPERAND_OBJECT     *Object;

    ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue);

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        return_VOID;

    }

    /* Get the associated object */

    Object = AcpiNsGetAttachedObject (Node);

    /*

     * Undefine the Arg or Local by setting its descriptor

     * pointer to NULL. Locals/Args can contain both

     * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs

     */

    Node->Object = NULL;

    if ((Object) &&

        (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND))

    {

        /*

         * There is a valid object.

         * Decrement the reference count by one to balance the

         * increment when the object was stored.

         */

        AcpiUtRemoveReference (Object);

    }

    return_VOID;

}

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

 *

 * FUNCTION:    AcpiDsStoreObjectToLocal

 *

 * PARAMETERS:  Type                - Either ACPI_REFCLASS_LOCAL or

 *                                    ACPI_REFCLASS_ARG

 *              Index               - Which Local or Arg to set

 *              ObjDesc             - Value to be stored

 *              WalkState           - Current walk state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Store a value in an Arg or Local.  The ObjDesc is installed

 *              as the new value for the Arg or Local and the reference count

 *              for ObjDesc is incremented.

 *

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

ACPI_STATUS

AcpiDsStoreObjectToLocal (

    UINT8                   Type,

    UINT32                  Index,

    ACPI_OPERAND_OBJECT     *ObjDesc,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_OPERAND_OBJECT     *CurrentObjDesc;

    ACPI_OPERAND_OBJECT     *NewObjDesc;

    ACPI_FUNCTION_TRACE (DsStoreObjectToLocal);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",

        Type, Index, ObjDesc));

    /* Parameter validation */

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    CurrentObjDesc = AcpiNsGetAttachedObject (Node);

    if (CurrentObjDesc == ObjDesc)

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n",

            ObjDesc));

        return_ACPI_STATUS (Status);

    }

    /*

     * If the reference count on the object is more than one, we must

     * take a copy of the object before we store.  A reference count

     * of exactly 1 means that the object was just created during the

     * evaluation of an expression, and we can safely use it since it

     * is not used anywhere else.

     */

    NewObjDesc = ObjDesc;

    if (ObjDesc->Common.ReferenceCount > 1)

    {

        Status = AcpiUtCopyIobjectToIobject (ObjDesc, &NewObjDesc, WalkState);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

    }

    /*

     * If there is an object already in this slot, we either

     * have to delete it, or if this is an argument and there

     * is an object reference stored there, we have to do

     * an indirect store!

     */

    if (CurrentObjDesc)

    {

        /*

         * Check for an indirect store if an argument

         * contains an object reference (stored as an Node).

         * We don't allow this automatic dereferencing for

         * locals, since a store to a local should overwrite

         * anything there, including an object reference.

         *

         * If both Arg0 and Local0 contain RefOf (Local4):

         *

         * Store (1, Arg0)             - Causes indirect store to local4

         * Store (1, Local0)           - Stores 1 in local0, overwriting

         *                                  the reference to local4

         * Store (1, DeRefof (Local0)) - Causes indirect store to local4

         *

         * Weird, but true.

         */

        if (Type == ACPI_REFCLASS_ARG)

        {

            /*

             * If we have a valid reference object that came from RefOf(),

             * do the indirect store

             */

            if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) == ACPI_DESC_TYPE_OPERAND) &&

                (CurrentObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&

                (CurrentObjDesc->Reference.Class == ACPI_REFCLASS_REFOF))

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

                        "Arg (%p) is an ObjRef(Node), storing in node %p\n",

                        NewObjDesc, CurrentObjDesc));

                /*

                 * Store this object to the Node (perform the indirect store)

                 * NOTE: No implicit conversion is performed, as per the ACPI

                 * specification rules on storing to Locals/Args.

                 */

                Status = AcpiExStoreObjectToNode (NewObjDesc,

                            CurrentObjDesc->Reference.Object, WalkState,

                            ACPI_NO_IMPLICIT_CONVERSION);

                /* Remove local reference if we copied the object above */

                if (NewObjDesc != ObjDesc)

                {

                    AcpiUtRemoveReference (NewObjDesc);

                }

                return_ACPI_STATUS (Status);

            }

        }

        /* Delete the existing object before storing the new one */

        AcpiDsMethodDataDeleteValue (Type, Index, WalkState);

    }

    /*

     * Install the Obj descriptor (*NewObjDesc) into

     * the descriptor for the Arg or Local.

     * (increments the object reference count by one)

     */

    Status = AcpiDsMethodDataSetValue (Type, Index, NewObjDesc, WalkState);

    /* Remove local reference if we copied the object above */

    if (NewObjDesc != ObjDesc)

    {

        AcpiUtRemoveReference (NewObjDesc);

    }

    return_ACPI_STATUS (Status);

}

#ifdef ACPI_OBSOLETE_FUNCTIONS

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

 *

 * FUNCTION:    AcpiDsMethodDataGetType

 *

 * PARAMETERS:  Opcode              - Either AML_LOCAL_OP or AML_ARG_OP

 *              Index               - Which Local or Arg whose type to get

 *              WalkState           - Current walk state object

 *

 * RETURN:      Data type of current value of the selected Arg or Local

 *

 * DESCRIPTION: Get the type of the object stored in the Local or Arg

 *

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

ACPI_OBJECT_TYPE

AcpiDsMethodDataGetType (

    UINT16                  Opcode,

    UINT32                  Index,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_OPERAND_OBJECT     *Object;

    ACPI_FUNCTION_TRACE (DsMethodDataGetType);

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        return_VALUE ((ACPI_TYPE_NOT_FOUND));

    }

    /* Get the object */

    Object = AcpiNsGetAttachedObject (Node);

    if (!Object)

    {

        /* Uninitialized local/arg, return TYPE_ANY */

        return_VALUE (ACPI_TYPE_ANY);

    }

    /* Get the object type */

    return_VALUE (Object->Type);

}

#endif