FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/dispatcher/dsmthdat.c

     /*******************************************************************************
      *
      * Module Name: dsmthdat - control method arguments and local variables
      *
      ******************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acdispat.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/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 parameter 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_FIRST LOCAL_OP or
    *                                    AML_FIRST_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

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