text: /******************************************************************************
   *
   * Module Name: dsobject - Dispatcher object management routines
   *
   *****************************************************************************/
  
  /*
   * Copyright (C) 2000 - 2014, Intel Corp.
   * All rights reserved.
   *
   * 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.
   *
   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   *
   * NO WARRANTY
   * 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 MERCHANTIBILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
   */
  
  #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_OBJECT_TYPE        Type;
  
  
      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);
              }
  
              /*
               * Special handling for Alias objects. We need to setup the type
               * and the Op->Common.Node to point to the Alias target. Note,
               * Alias has at most one level of indirection internally.
               */
              Type = Op->Common.Node->Type;
              if (Type == ACPI_TYPE_LOCAL_ALIAS)
              {
                  Type = ObjDesc->Common.Type;
                  Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
                      Op->Common.Node->Object);
              }
  
              switch (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, found AML opcode 0x%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. Truncate the package to NumElements.
           *
           * 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, we just print a message and
           * no exception is returned. This provides Windows compatibility. Some
           * BIOSs will alter the NumElements on the fly, creating this type
           * of ill-formed package object.
           */
          while (Arg)
          {
              /*
               * We must delete any package elements that were created earlier
               * and are not going to be used because of the package truncation.
               */
              if (Arg->Common.Node)
              {
                  AcpiUtRemoveReference (
                      ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node));
                  Arg->Common.Node = NULL;
              }
  
              /* Find out how many elements there really are */
  
              i++;
              Arg = Arg->Common.Next;
          }
  
          ACPI_INFO ((AE_INFO,
              "Actual Package length (%u) is larger than NumElements field (%u), truncated",
              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 (%u) smaller than NumElements count (%u), 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_UINT64_MAX;
  
                  /* Truncate value if we are executing from a 32-bit ACPI table */
  
  #ifndef ACPI_NO_METHOD_EXECUTION
                  (void) AcpiExTruncateFor32bitTable (ObjDesc);
  #endif
                  break;
  
              case AML_REVISION_OP:
  
                  ObjDesc->Integer.Value = ACPI_CA_VERSION;
                  break;
  
              default:
  
                  ACPI_ERROR ((AE_INFO,
                      "Unknown constant opcode 0x%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
              if (AcpiExTruncateFor32bitTable (ObjDesc))
              {
                  /* Warn if we found a 64-bit constant in a 32-bit table */
  
                  ACPI_WARNING ((AE_INFO,
                      "Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X",
                      ACPI_FORMAT_UINT64 (Op->Common.Value.Integer),
                      (UINT32) ObjDesc->Integer.Value));
              }
  #endif
              break;
  
          default:
  
              ACPI_ERROR ((AE_INFO, "Unknown Integer type 0x%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: 0x%4.4X", Opcode));
                  return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
              }
              break;
          }
          break;
  
      default:
  
          ACPI_ERROR ((AE_INFO, "Unimplemented data type: 0x%X",
              ObjDesc->Common.Type));
  
          Status = AE_AML_OPERAND_TYPE;
          break;
      }
  
      return_ACPI_STATUS (Status);
  }
  