FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/executer/exstore.c

     /******************************************************************************
      *
      * Module Name: exstore - AML Interpreter object store support
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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/acinterp.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   
   
   #define _COMPONENT          ACPI_EXECUTER
           ACPI_MODULE_NAME    ("exstore")
   
   /* Local prototypes */
   
   static ACPI_STATUS
   AcpiExStoreObjectToIndex (
       ACPI_OPERAND_OBJECT     *ValDesc,
       ACPI_OPERAND_OBJECT     *DestDesc,
       ACPI_WALK_STATE         *WalkState);
   
   static ACPI_STATUS
   AcpiExStoreDirectToNode (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_NAMESPACE_NODE     *Node,
       ACPI_WALK_STATE         *WalkState);
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExStore
    *
    * PARAMETERS:  *SourceDesc         - Value to be stored
    *              *DestDesc           - Where to store it. Must be an NS node
    *                                    or ACPI_OPERAND_OBJECT of type
    *                                    Reference;
    *              WalkState           - Current walk state
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Store the value described by SourceDesc into the location
    *              described by DestDesc. Called by various interpreter
    *              functions to store the result of an operation into
    *              the destination operand -- not just simply the actual "Store"
    *              ASL operator.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExStore (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_OPERAND_OBJECT     *DestDesc,
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     *RefDesc = DestDesc;
   
   
       ACPI_FUNCTION_TRACE_PTR (ExStore, DestDesc);
   
   
       /* Validate parameters */
   
       if (!SourceDesc || !DestDesc)
       {
           ACPI_ERROR ((AE_INFO, "Null parameter"));
           return_ACPI_STATUS (AE_AML_NO_OPERAND);
       }
   
       /* DestDesc can be either a namespace node or an ACPI object */
   
       if (ACPI_GET_DESCRIPTOR_TYPE (DestDesc) == ACPI_DESC_TYPE_NAMED)
       {
           /*
            * Dest is a namespace node,
            * Storing an object into a Named node.
            */
           Status = AcpiExStoreObjectToNode (SourceDesc,
               (ACPI_NAMESPACE_NODE *) DestDesc, WalkState,
               ACPI_IMPLICIT_CONVERSION);
   
           return_ACPI_STATUS (Status);
       }
   
       /* Destination object must be a Reference or a Constant object */
   
       switch (DestDesc->Common.Type)
       {
       case ACPI_TYPE_LOCAL_REFERENCE:
   
           break;
   
       case ACPI_TYPE_INTEGER:
   
           /* Allow stores to Constants -- a Noop as per ACPI spec */
   
           if (DestDesc->Common.Flags & AOPOBJ_AML_CONSTANT)
           {
               return_ACPI_STATUS (AE_OK);
           }
   
           ACPI_FALLTHROUGH;
   
       default:
   
           /* Destination is not a Reference object */
   
           ACPI_ERROR ((AE_INFO,
               "Target is not a Reference or Constant object - [%s] %p",
               AcpiUtGetObjectTypeName (DestDesc), DestDesc));
   
           return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
       }
   
       /*
        * Examine the Reference class. These cases are handled:
        *
        * 1) Store to Name (Change the object associated with a name)
        * 2) Store to an indexed area of a Buffer or Package
        * 3) Store to a Method Local or Arg
        * 4) Store to the debug object
        */
       switch (RefDesc->Reference.Class)
       {
       case ACPI_REFCLASS_REFOF:
   
           /* Storing an object into a Name "container" */
   
           Status = AcpiExStoreObjectToNode (SourceDesc,
               RefDesc->Reference.Object,
               WalkState, ACPI_IMPLICIT_CONVERSION);
           break;
   
       case ACPI_REFCLASS_INDEX:
   
           /* Storing to an Index (pointer into a packager or buffer) */
   
           Status = AcpiExStoreObjectToIndex (SourceDesc, RefDesc, WalkState);
           break;
   
       case ACPI_REFCLASS_LOCAL:
       case ACPI_REFCLASS_ARG:
   
           /* Store to a method local/arg  */
   
           Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Class,
               RefDesc->Reference.Value, SourceDesc, WalkState);
           break;
   
       case ACPI_REFCLASS_DEBUG:
           /*
            * Storing to the Debug object causes the value stored to be
            * displayed and otherwise has no effect -- see ACPI Specification
            */
           ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
               "**** Write to Debug Object: Object %p [%s] ****:\n\n",
               SourceDesc, AcpiUtGetObjectTypeName (SourceDesc)));
   
           ACPI_DEBUG_OBJECT (SourceDesc, 0, 0);
           break;
   
       default:
   
           ACPI_ERROR ((AE_INFO, "Unknown Reference Class 0x%2.2X",
               RefDesc->Reference.Class));
           ACPI_DUMP_ENTRY (RefDesc, ACPI_LV_INFO);
   
           Status = AE_AML_INTERNAL;
           break;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExStoreObjectToIndex
    *
    * PARAMETERS:  *SourceDesc             - Value to be stored
    *              *DestDesc               - Named object to receive the value
    *              WalkState               - Current walk state
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Store the object to indexed Buffer or Package element
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiExStoreObjectToIndex (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_OPERAND_OBJECT     *IndexDesc,
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     *ObjDesc;
       ACPI_OPERAND_OBJECT     *NewDesc;
       UINT8                   Value = 0;
       UINT32                  i;
   
   
       ACPI_FUNCTION_TRACE (ExStoreObjectToIndex);
   
   
       /*
        * Destination must be a reference pointer, and
        * must point to either a buffer or a package
        */
       switch (IndexDesc->Reference.TargetType)
       {
       case ACPI_TYPE_PACKAGE:
           /*
            * Storing to a package element. Copy the object and replace
            * any existing object with the new object. No implicit
            * conversion is performed.
            *
            * The object at *(IndexDesc->Reference.Where) is the
            * element within the package that is to be modified.
            * The parent package object is at IndexDesc->Reference.Object
            */
           ObjDesc = *(IndexDesc->Reference.Where);
   
           if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE &&
               SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE)
           {
               /* This is a DDBHandle, just add a reference to it */
   
               AcpiUtAddReference (SourceDesc);
               NewDesc = SourceDesc;
           }
           else
           {
               /* Normal object, copy it */
   
               Status = AcpiUtCopyIobjectToIobject (
                   SourceDesc, &NewDesc, WalkState);
               if (ACPI_FAILURE (Status))
               {
                   return_ACPI_STATUS (Status);
               }
           }
   
           if (ObjDesc)
           {
               /* Decrement reference count by the ref count of the parent package */
   
               for (i = 0;
                    i < ((ACPI_OPERAND_OBJECT *)
                           IndexDesc->Reference.Object)->Common.ReferenceCount;
                    i++)
               {
                   AcpiUtRemoveReference (ObjDesc);
               }
           }
   
           *(IndexDesc->Reference.Where) = NewDesc;
   
           /* Increment ref count by the ref count of the parent package-1 */
   
           for (i = 1;
                i < ((ACPI_OPERAND_OBJECT *)
                       IndexDesc->Reference.Object)->Common.ReferenceCount;
                i++)
           {
               AcpiUtAddReference (NewDesc);
           }
   
           break;
   
       case ACPI_TYPE_BUFFER_FIELD:
           /*
            * Store into a Buffer or String (not actually a real BufferField)
            * at a location defined by an Index.
            *
            * The first 8-bit element of the source object is written to the
            * 8-bit Buffer location defined by the Index destination object,
            * according to the ACPI 2.0 specification.
            */
   
           /*
            * Make sure the target is a Buffer or String. An error should
            * not happen here, since the ReferenceObject was constructed
            * by the INDEX_OP code.
            */
           ObjDesc = IndexDesc->Reference.Object;
           if ((ObjDesc->Common.Type != ACPI_TYPE_BUFFER) &&
               (ObjDesc->Common.Type != ACPI_TYPE_STRING))
           {
               return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
           }
   
           /*
            * The assignment of the individual elements will be slightly
            * different for each source type.
            */
           switch (SourceDesc->Common.Type)
           {
           case ACPI_TYPE_INTEGER:
   
               /* Use the least-significant byte of the integer */
   
               Value = (UINT8) (SourceDesc->Integer.Value);
               break;
   
           case ACPI_TYPE_BUFFER:
           case ACPI_TYPE_STRING:
   
               /* Note: Takes advantage of common string/buffer fields */
   
               Value = SourceDesc->Buffer.Pointer[0];
               break;
   
           default:
   
               /* All other types are invalid */
   
               ACPI_ERROR ((AE_INFO,
                   "Source must be type [Integer/Buffer/String], found [%s]",
                   AcpiUtGetObjectTypeName (SourceDesc)));
               return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
           }
   
           /* Store the source value into the target buffer byte */
   
           ObjDesc->Buffer.Pointer[IndexDesc->Reference.Value] = Value;
           break;
   
       default:
           ACPI_ERROR ((AE_INFO,
               "Target is not of type [Package/BufferField]"));
           Status = AE_AML_TARGET_TYPE;
           break;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExStoreObjectToNode
    *
    * PARAMETERS:  SourceDesc              - Value to be stored
    *              Node                    - Named object to receive the value
    *              WalkState               - Current walk state
    *              ImplicitConversion      - Perform implicit conversion (yes/no)
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Store the object to the named object.
    *
    * The assignment of an object to a named object is handled here.
    * The value passed in will replace the current value (if any)
    * with the input value.
    *
    * When storing into an object the data is converted to the
    * target object type then stored in the object. This means
    * that the target object type (for an initialized target) will
    * not be changed by a store operation. A CopyObject can change
    * the target type, however.
    *
    * The ImplicitConversion flag is set to NO/FALSE only when
    * storing to an ArgX -- as per the rules of the ACPI spec.
    *
    * Assumes parameters are already validated.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiExStoreObjectToNode (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_NAMESPACE_NODE     *Node,
       ACPI_WALK_STATE         *WalkState,
       UINT8                   ImplicitConversion)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_OPERAND_OBJECT     *TargetDesc;
       ACPI_OPERAND_OBJECT     *NewDesc;
       ACPI_OBJECT_TYPE        TargetType;
   
   
       ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);
   
   
       /* Get current type of the node, and object attached to Node */
   
       TargetType = AcpiNsGetType (Node);
       TargetDesc = AcpiNsGetAttachedObject (Node);
   
       ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p [%s] to node %p [%s]\n",
           SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
           Node, AcpiUtGetTypeName (TargetType)));
   
       /* Only limited target types possible for everything except CopyObject */
   
       if (WalkState->Opcode != AML_COPY_OBJECT_OP)
       {
           /*
            * Only CopyObject allows all object types to be overwritten. For
            * TargetRef(s), there are restrictions on the object types that
            * are allowed.
            *
            * Allowable operations/typing for Store:
            *
            * 1) Simple Store
            *      Integer     --> Integer (Named/Local/Arg)
            *      String      --> String  (Named/Local/Arg)
            *      Buffer      --> Buffer  (Named/Local/Arg)
            *      Package     --> Package (Named/Local/Arg)
            *
            * 2) Store with implicit conversion
            *      Integer     --> String or Buffer  (Named)
            *      String      --> Integer or Buffer (Named)
            *      Buffer      --> Integer or String (Named)
            */
           switch (TargetType)
           {
           case ACPI_TYPE_PACKAGE:
               /*
                * Here, can only store a package to an existing package.
                * Storing a package to a Local/Arg is OK, and handled
                * elsewhere.
                */
               if (WalkState->Opcode == AML_STORE_OP)
               {
                   if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
                   {
                       ACPI_ERROR ((AE_INFO,
                           "Cannot assign type [%s] to [Package] "
                           "(source must be type Pkg)",
                           AcpiUtGetObjectTypeName (SourceDesc)));
   
                       return_ACPI_STATUS (AE_AML_TARGET_TYPE);
                   }
                   break;
               }
   
               ACPI_FALLTHROUGH;
   
           case ACPI_TYPE_DEVICE:
           case ACPI_TYPE_EVENT:
           case ACPI_TYPE_MUTEX:
           case ACPI_TYPE_REGION:
           case ACPI_TYPE_POWER:
           case ACPI_TYPE_PROCESSOR:
           case ACPI_TYPE_THERMAL:
   
               ACPI_ERROR ((AE_INFO,
                   "Target must be [Buffer/Integer/String/Reference]"
                   ", found [%s] (%4.4s)",
                   AcpiUtGetTypeName (Node->Type), Node->Name.Ascii));
   
               return_ACPI_STATUS (AE_AML_TARGET_TYPE);
   
           default:
               break;
           }
       }
   
       /*
        * Resolve the source object to an actual value
        * (If it is a reference object)
        */
       Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /* Do the actual store operation */
   
       switch (TargetType)
       {
           /*
            * The simple data types all support implicit source operand
            * conversion before the store.
            */
       case ACPI_TYPE_INTEGER:
       case ACPI_TYPE_STRING:
       case ACPI_TYPE_BUFFER:
   
           if ((WalkState->Opcode == AML_COPY_OBJECT_OP) ||
               !ImplicitConversion)
           {
               /*
                * However, CopyObject and Stores to ArgX do not perform
                * an implicit conversion, as per the ACPI specification.
                * A direct store is performed instead.
                */
               Status = AcpiExStoreDirectToNode (SourceDesc, Node, WalkState);
               break;
           }
   
           /* Store with implicit source operand conversion support */
   
           Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc,
               &NewDesc, WalkState);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           if (NewDesc != TargetDesc)
           {
               /*
                * Store the new NewDesc as the new value of the Name, and set
                * the Name's type to that of the value being stored in it.
                * SourceDesc reference count is incremented by AttachObject.
                *
                * Note: This may change the type of the node if an explicit
                * store has been performed such that the node/object type
                * has been changed.
                */
               Status = AcpiNsAttachObject (
                   Node, NewDesc, NewDesc->Common.Type);
   
               ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                   "Store type [%s] into [%s] via Convert/Attach\n",
                   AcpiUtGetObjectTypeName (SourceDesc),
                   AcpiUtGetObjectTypeName (NewDesc)));
           }
           break;
   
       case ACPI_TYPE_BUFFER_FIELD:
       case ACPI_TYPE_LOCAL_REGION_FIELD:
       case ACPI_TYPE_LOCAL_BANK_FIELD:
       case ACPI_TYPE_LOCAL_INDEX_FIELD:
           /*
            * For all fields, always write the source data to the target
            * field. Any required implicit source operand conversion is
            * performed in the function below as necessary. Note, field
            * objects must retain their original type permanently.
            */
           Status = AcpiExWriteDataToField (SourceDesc, TargetDesc,
               &WalkState->ResultObj);
           break;
   
       default:
           /*
            * CopyObject operator: No conversions for all other types.
            * Instead, directly store a copy of the source object.
            *
            * This is the ACPI spec-defined behavior for the CopyObject
            * operator. (Note, for this default case, all normal
            * Store/Target operations exited above with an error).
            */
           Status = AcpiExStoreDirectToNode (SourceDesc, Node, WalkState);
           break;
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiExStoreDirectToNode
    *
    * PARAMETERS:  SourceDesc              - Value to be stored
    *              Node                    - Named object to receive the value
    *              WalkState               - Current walk state
    *
    * RETURN:      Status
    *
    * DESCRIPTION: "Store" an object directly to a node. This involves a copy
    *              and an attach.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiExStoreDirectToNode (
       ACPI_OPERAND_OBJECT     *SourceDesc,
       ACPI_NAMESPACE_NODE     *Node,
       ACPI_WALK_STATE         *WalkState)
   {
       ACPI_STATUS             Status;
       ACPI_OPERAND_OBJECT     *NewDesc;
   
   
       ACPI_FUNCTION_TRACE (ExStoreDirectToNode);
   
   
       ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
           "Storing [%s] (%p) directly into node [%s] (%p)"
           " with no implicit conversion\n",
           AcpiUtGetObjectTypeName (SourceDesc), SourceDesc,
           AcpiUtGetTypeName (Node->Type), Node));
   
       /* Copy the source object to a new object */
   
       Status = AcpiUtCopyIobjectToIobject (SourceDesc, &NewDesc, WalkState);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /* Attach the new object to the node */
   
       Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type);
       AcpiUtRemoveReference (NewDesc);
       return_ACPI_STATUS (Status);
   }

Cache object: 9390c79a1fc30ff818b33f971b8b6749