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 /******************************************************************************
  *
  * Module Name: dsobject - Dispatcher object management routines
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, 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 __DSOBJECT_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acparser.h"
 #include "amlcode.h"
 #include "acdispat.h"
 #include "acnamesp.h"
 #include "acinterp.h"
 
 #define _COMPONENT          ACPI_DISPATCHER
         ACPI_MODULE_NAME    ("dsobject")
 
 /* Local prototypes */
 
 static ACPI_STATUS
 AcpiDsBuildInternalObject (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       *Op,
     ACPI_OPERAND_OBJECT     **ObjDescPtr);
 
 
 #ifndef ACPI_NO_METHOD_EXECUTION
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsBuildInternalObject
  *
  * PARAMETERS:  WalkState       - Current walk state
  *              Op              - Parser object to be translated
  *              ObjDescPtr      - Where the ACPI internal object is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
  *              Simple objects are any objects other than a package object!
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiDsBuildInternalObject (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       *Op,
     ACPI_OPERAND_OBJECT     **ObjDescPtr)
 {
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (DsBuildInternalObject);
 
 
     *ObjDescPtr = NULL;
     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
     {
         /*
          * This is a named object reference. If this name was
          * previously looked up in the namespace, it was stored in this op.
          * Otherwise, go ahead and look it up now
          */
         if (!Op->Common.Node)
         {
             Status = AcpiNsLookup (WalkState->ScopeInfo,
                         Op->Common.Value.String,
                         ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
                         ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
                         ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
             if (ACPI_FAILURE (Status))
             {
                 /* Check if we are resolving a named reference within a package */
 
                 if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) &&
 
                     ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
                      (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
                 {
                     /*
                      * We didn't find the target and we are populating elements
                      * of a package - ignore if slack enabled. Some ASL code
                      * contains dangling invalid references in packages and
                      * expects that no exception will be issued. Leave the
                      * element as a null element. It cannot be used, but it
                      * can be overwritten by subsequent ASL code - this is
                      * typically the case.
                      */
                     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                         "Ignoring unresolved reference in package [%4.4s]\n",
                         WalkState->ScopeInfo->Scope.Node->Name.Ascii));
 
                     return_ACPI_STATUS (AE_OK);
                 }
                 else
                 {
                     ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status);
                 }
 
                 return_ACPI_STATUS (Status);
             }
         }
 
         /* Special object resolution for elements of a package */
 
         if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
             (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
         {
             /*
              * Attempt to resolve the node to a value before we insert it into
              * the package. If this is a reference to a common data type,
              * resolve it immediately. According to the ACPI spec, package
              * elements can only be "data objects" or method references.
              * Attempt to resolve to an Integer, Buffer, String or Package.
              * If cannot, return the named reference (for things like Devices,
              * Methods, etc.) Buffer Fields and Fields will resolve to simple
              * objects (int/buf/str/pkg).
              *
              * NOTE: References to things like Devices, Methods, Mutexes, etc.
              * will remain as named references. This behavior is not described
              * in the ACPI spec, but it appears to be an oversight.
              */
             ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Op->Common.Node);
 
             Status = AcpiExResolveNodeToValue (
                         ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc),
                         WalkState);
             if (ACPI_FAILURE (Status))
             {
                 return_ACPI_STATUS (Status);
             }
 
             switch (Op->Common.Node->Type)
             {
             /*
              * For these types, we need the actual node, not the subobject.
              * However, the subobject did not get an extra reference count above.
              *
              * TBD: should ExResolveNodeToValue be changed to fix this?
              */
             case ACPI_TYPE_DEVICE:
             case ACPI_TYPE_THERMAL:
 
                 AcpiUtAddReference (Op->Common.Node->Object);
 
                 /*lint -fallthrough */
             /*
              * For these types, we need the actual node, not the subobject.
              * The subobject got an extra reference count in ExResolveNodeToValue.
              */
             case ACPI_TYPE_MUTEX:
             case ACPI_TYPE_METHOD:
             case ACPI_TYPE_POWER:
             case ACPI_TYPE_PROCESSOR:
             case ACPI_TYPE_EVENT:
             case ACPI_TYPE_REGION:
 
                 /* We will create a reference object for these types below */
                 break;
 
             default:
                 /*
                  * All other types - the node was resolved to an actual
                  * object, we are done.
                  */
                 goto Exit;
             }
         }
     }
 
     /* Create and init a new internal ACPI object */
 
     ObjDesc = AcpiUtCreateInternalObject (
                 (AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
     if (!ObjDesc)
     {
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode,
                 &ObjDesc);
     if (ACPI_FAILURE (Status))
     {
         AcpiUtRemoveReference (ObjDesc);
         return_ACPI_STATUS (Status);
     }
 
 Exit:
     *ObjDescPtr = ObjDesc;
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsBuildInternalBufferObj
  *
  * PARAMETERS:  WalkState       - Current walk state
  *              Op              - Parser object to be translated
  *              BufferLength    - Length of the buffer
  *              ObjDescPtr      - Where the ACPI internal object is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Translate a parser Op package object to the equivalent
  *              namespace object
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsBuildInternalBufferObj (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       *Op,
     UINT32                  BufferLength,
     ACPI_OPERAND_OBJECT     **ObjDescPtr)
 {
     ACPI_PARSE_OBJECT       *Arg;
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_PARSE_OBJECT       *ByteList;
     UINT32                  ByteListLength = 0;
 
 
     ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj);
 
 
     /*
      * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
      * The buffer object already exists (from the NS node), otherwise it must
      * be created.
      */
     ObjDesc = *ObjDescPtr;
     if (!ObjDesc)
     {
         /* Create a new buffer object */
 
         ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
         *ObjDescPtr = ObjDesc;
         if (!ObjDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
     }
 
     /*
      * Second arg is the buffer data (optional) ByteList can be either
      * individual bytes or a string initializer.  In either case, a
      * ByteList appears in the AML.
      */
     Arg = Op->Common.Value.Arg;         /* skip first arg */
 
     ByteList = Arg->Named.Next;
     if (ByteList)
     {
         if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP)
         {
             ACPI_ERROR ((AE_INFO,
                 "Expecting bytelist, got AML opcode %X in op %p",
                 ByteList->Common.AmlOpcode, ByteList));
 
             AcpiUtRemoveReference (ObjDesc);
             return (AE_TYPE);
         }
 
         ByteListLength = (UINT32) ByteList->Common.Value.Integer;
     }
 
     /*
      * The buffer length (number of bytes) will be the larger of:
      * 1) The specified buffer length and
      * 2) The length of the initializer byte list
      */
     ObjDesc->Buffer.Length = BufferLength;
     if (ByteListLength > BufferLength)
     {
         ObjDesc->Buffer.Length = ByteListLength;
     }
 
     /* Allocate the buffer */
 
     if (ObjDesc->Buffer.Length == 0)
     {
         ObjDesc->Buffer.Pointer = NULL;
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "Buffer defined with zero length in AML, creating\n"));
     }
     else
     {
         ObjDesc->Buffer.Pointer = ACPI_ALLOCATE_ZEROED (
                                         ObjDesc->Buffer.Length);
         if (!ObjDesc->Buffer.Pointer)
         {
             AcpiUtDeleteObjectDesc (ObjDesc);
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         /* Initialize buffer from the ByteList (if present) */
 
         if (ByteList)
         {
             ACPI_MEMCPY (ObjDesc->Buffer.Pointer, ByteList->Named.Data,
                          ByteListLength);
         }
     }
 
     ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
     Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsBuildInternalPackageObj
  *
  * PARAMETERS:  WalkState       - Current walk state
  *              Op              - Parser object to be translated
  *              ElementCount    - Number of elements in the package - this is
  *                                the NumElements argument to Package()
  *              ObjDescPtr      - Where the ACPI internal object is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Translate a parser Op package object to the equivalent
  *              namespace object
  *
  * NOTE: The number of elements in the package will be always be the NumElements
  * count, regardless of the number of elements in the package list. If
  * NumElements is smaller, only that many package list elements are used.
  * if NumElements is larger, the Package object is padded out with
  * objects of type Uninitialized (as per ACPI spec.)
  *
  * Even though the ASL compilers do not allow NumElements to be smaller
  * than the Package list length (for the fixed length package opcode), some
  * BIOS code modifies the AML on the fly to adjust the NumElements, and
  * this code compensates for that. This also provides compatibility with
  * other AML interpreters.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsBuildInternalPackageObj (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       *Op,
     UINT32                  ElementCount,
     ACPI_OPERAND_OBJECT     **ObjDescPtr)
 {
     ACPI_PARSE_OBJECT       *Arg;
     ACPI_PARSE_OBJECT       *Parent;
     ACPI_OPERAND_OBJECT     *ObjDesc = NULL;
     ACPI_STATUS             Status = AE_OK;
     UINT32                  i;
     UINT16                  Index;
     UINT16                  ReferenceCount;
 
 
     ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj);
 
 
     /* Find the parent of a possibly nested package */
 
     Parent = Op->Common.Parent;
     while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
            (Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
     {
         Parent = Parent->Common.Parent;
     }
 
     /*
      * If we are evaluating a Named package object "Name (xxxx, Package)",
      * the package object already exists, otherwise it must be created.
      */
     ObjDesc = *ObjDescPtr;
     if (!ObjDesc)
     {
         ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
         *ObjDescPtr = ObjDesc;
         if (!ObjDesc)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         ObjDesc->Package.Node = Parent->Common.Node;
     }
 
     /*
      * Allocate the element array (array of pointers to the individual
      * objects) based on the NumElements parameter. Add an extra pointer slot
      * so that the list is always null terminated.
      */
     ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED (
         ((ACPI_SIZE) ElementCount + 1) * sizeof (void *));
 
     if (!ObjDesc->Package.Elements)
     {
         AcpiUtDeleteObjectDesc (ObjDesc);
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     ObjDesc->Package.Count = ElementCount;
 
     /*
      * Initialize the elements of the package, up to the NumElements count.
      * Package is automatically padded with uninitialized (NULL) elements
      * if NumElements is greater than the package list length. Likewise,
      * Package is truncated if NumElements is less than the list length.
      */
     Arg = Op->Common.Value.Arg;
     Arg = Arg->Common.Next;
     for (i = 0; Arg && (i < ElementCount); i++)
     {
         if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
         {
             if (Arg->Common.Node->Type == ACPI_TYPE_METHOD)
             {
                 /*
                  * A method reference "looks" to the parser to be a method
                  * invocation, so we special case it here
                  */
                 Arg->Common.AmlOpcode = AML_INT_NAMEPATH_OP;
                 Status = AcpiDsBuildInternalObject (WalkState, Arg,
                             &ObjDesc->Package.Elements[i]);
             }
             else
             {
                 /* This package element is already built, just get it */
 
                 ObjDesc->Package.Elements[i] =
                     ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node);
             }
         }
         else
         {
             Status = AcpiDsBuildInternalObject (WalkState, Arg,
                         &ObjDesc->Package.Elements[i]);
         }
 
         if (*ObjDescPtr)
         {
             /* Existing package, get existing reference count */
 
             ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount;
             if (ReferenceCount > 1)
             {
                 /* Make new element ref count match original ref count */
 
                 for (Index = 0; Index < (ReferenceCount - 1); Index++)
                 {
                     AcpiUtAddReference ((ObjDesc->Package.Elements[i]));
                 }
             }
         }
 
         Arg = Arg->Common.Next;
     }
 
     /* Check for match between NumElements and actual length of PackageList */
 
     if (Arg)
     {
         /*
          * NumElements was exhausted, but there are remaining elements in the
          * PackageList.
          *
          * Note: technically, this is an error, from ACPI spec: "It is an error
          * for NumElements to be less than the number of elements in the
          * PackageList". However, for now, we just print an error message and
          * no exception is returned.
          */
         while (Arg)
         {
             /* Find out how many elements there really are */
 
             i++;
             Arg = Arg->Common.Next;
         }
 
         ACPI_ERROR ((AE_INFO,
             "Package List length (%X) larger than NumElements count (%X), truncated\n",
             i, ElementCount));
     }
     else if (i < ElementCount)
     {
         /*
          * Arg list (elements) was exhausted, but we did not reach NumElements count.
          * Note: this is not an error, the package is padded out with NULLs.
          */
         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
             "Package List length (%X) smaller than NumElements count (%X), padded with null elements\n",
             i, ElementCount));
     }
 
     ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
     Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsCreateNode
  *
  * PARAMETERS:  WalkState       - Current walk state
  *              Node            - NS Node to be initialized
  *              Op              - Parser object to be translated
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create the object to be associated with a namespace node
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsCreateNode (
     ACPI_WALK_STATE         *WalkState,
     ACPI_NAMESPACE_NODE     *Node,
     ACPI_PARSE_OBJECT       *Op)
 {
     ACPI_STATUS             Status;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 
 
     ACPI_FUNCTION_TRACE_PTR (DsCreateNode, Op);
 
 
     /*
      * Because of the execution pass through the non-control-method
      * parts of the table, we can arrive here twice.  Only init
      * the named object node the first time through
      */
     if (AcpiNsGetAttachedObject (Node))
     {
         return_ACPI_STATUS (AE_OK);
     }
 
     if (!Op->Common.Value.Arg)
     {
         /* No arguments, there is nothing to do */
 
         return_ACPI_STATUS (AE_OK);
     }
 
     /* Build an internal object for the argument(s) */
 
     Status = AcpiDsBuildInternalObject (WalkState, Op->Common.Value.Arg,
                 &ObjDesc);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /* Re-type the object according to its argument */
 
     Node->Type = ObjDesc->Common.Type;
 
     /* Attach obj to node */
 
     Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type);
 
     /* Remove local reference to the object */
 
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 #endif /* ACPI_NO_METHOD_EXECUTION */
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsInitObjectFromOp
  *
  * PARAMETERS:  WalkState       - Current walk state
  *              Op              - Parser op used to init the internal object
  *              Opcode          - AML opcode associated with the object
  *              RetObjDesc      - Namespace object to be initialized
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Initialize a namespace object from a parser Op and its
  *              associated arguments.  The namespace object is a more compact
  *              representation of the Op and its arguments.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsInitObjectFromOp (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       *Op,
     UINT16                  Opcode,
     ACPI_OPERAND_OBJECT     **RetObjDesc)
 {
     const ACPI_OPCODE_INFO  *OpInfo;
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (DsInitObjectFromOp);
 
 
     ObjDesc = *RetObjDesc;
     OpInfo = AcpiPsGetOpcodeInfo (Opcode);
     if (OpInfo->Class == AML_CLASS_UNKNOWN)
     {
         /* Unknown opcode */
 
         return_ACPI_STATUS (AE_TYPE);
     }
 
     /* Perform per-object initialization */
 
     switch (ObjDesc->Common.Type)
     {
     case ACPI_TYPE_BUFFER:
 
         /*
          * Defer evaluation of Buffer TermArg operand
          */
         ObjDesc->Buffer.Node      = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
                                         WalkState->Operands[0]);
         ObjDesc->Buffer.AmlStart  = Op->Named.Data;
         ObjDesc->Buffer.AmlLength = Op->Named.Length;
         break;
 
 
     case ACPI_TYPE_PACKAGE:
 
         /*
          * Defer evaluation of Package TermArg operand
          */
         ObjDesc->Package.Node      = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
                                         WalkState->Operands[0]);
         ObjDesc->Package.AmlStart  = Op->Named.Data;
         ObjDesc->Package.AmlLength = Op->Named.Length;
         break;
 
 
     case ACPI_TYPE_INTEGER:
 
         switch (OpInfo->Type)
         {
         case AML_TYPE_CONSTANT:
             /*
              * Resolve AML Constants here - AND ONLY HERE!
              * All constants are integers.
              * We mark the integer with a flag that indicates that it started
              * life as a constant -- so that stores to constants will perform
              * as expected (noop). ZeroOp is used as a placeholder for optional
              * target operands.
              */
             ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;
 
             switch (Opcode)
             {
             case AML_ZERO_OP:
 
                 ObjDesc->Integer.Value = 0;
                 break;
 
             case AML_ONE_OP:
 
                 ObjDesc->Integer.Value = 1;
                 break;
 
             case AML_ONES_OP:
 
                 ObjDesc->Integer.Value = ACPI_INTEGER_MAX;
 
                 /* Truncate value if we are executing from a 32-bit ACPI table */
 
 #ifndef ACPI_NO_METHOD_EXECUTION
                 AcpiExTruncateFor32bitTable (ObjDesc);
 #endif
                 break;
 
             case AML_REVISION_OP:
 
                 ObjDesc->Integer.Value = ACPI_CA_VERSION;
                 break;
 
             default:
 
                 ACPI_ERROR ((AE_INFO,
                     "Unknown constant opcode %X", Opcode));
                 Status = AE_AML_OPERAND_TYPE;
                 break;
             }
             break;
 
 
         case AML_TYPE_LITERAL:
 
             ObjDesc->Integer.Value = Op->Common.Value.Integer;
 #ifndef ACPI_NO_METHOD_EXECUTION
             AcpiExTruncateFor32bitTable (ObjDesc);
 #endif
             break;
 
 
         default:
             ACPI_ERROR ((AE_INFO, "Unknown Integer type %X",
                 OpInfo->Type));
             Status = AE_AML_OPERAND_TYPE;
             break;
         }
         break;
 
 
     case ACPI_TYPE_STRING:
 
         ObjDesc->String.Pointer = Op->Common.Value.String;
         ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String);
 
         /*
          * The string is contained in the ACPI table, don't ever try
          * to delete it
          */
         ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
         break;
 
 
     case ACPI_TYPE_METHOD:
         break;
 
 
     case ACPI_TYPE_LOCAL_REFERENCE:
 
         switch (OpInfo->Type)
         {
         case AML_TYPE_LOCAL_VARIABLE:
 
             /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
 
             ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_LOCAL_OP;
             ObjDesc->Reference.Class = ACPI_REFCLASS_LOCAL;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
             Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_LOCAL,
                         ObjDesc->Reference.Value, WalkState,
                         ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
                             &ObjDesc->Reference.Object));
 #endif
             break;
 
 
         case AML_TYPE_METHOD_ARGUMENT:
 
             /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
 
             ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_ARG_OP;
             ObjDesc->Reference.Class = ACPI_REFCLASS_ARG;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
             Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_ARG,
                         ObjDesc->Reference.Value, WalkState,
                         ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
                             &ObjDesc->Reference.Object));
 #endif
             break;
 
         default: /* Object name or Debug object */
 
             switch (Op->Common.AmlOpcode)
             {
             case AML_INT_NAMEPATH_OP:
 
                 /* Node was saved in Op */
 
                 ObjDesc->Reference.Node = Op->Common.Node;
                 ObjDesc->Reference.Object = Op->Common.Node->Object;
                 ObjDesc->Reference.Class = ACPI_REFCLASS_NAME;
                 break;
 
             case AML_DEBUG_OP:
 
                 ObjDesc->Reference.Class = ACPI_REFCLASS_DEBUG;
                 break;
 
             default:
 
                 ACPI_ERROR ((AE_INFO,
                     "Unimplemented reference type for AML opcode: %4.4X", Opcode));
                 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
             }
             break;
         }
         break;
 
 
     default:
 
         ACPI_ERROR ((AE_INFO, "Unimplemented data type: %X",
             ObjDesc->Common.Type));
 
         Status = AE_AML_OPERAND_TYPE;
         break;
     }
 
     return_ACPI_STATUS (Status);
 }