text: /******************************************************************************
   *
   * Module Name: exstoren - AML Interpreter object store support,
   *                        Store to Node (namespace object)
   *
   *****************************************************************************/
  
  /******************************************************************************
   *
   * 1. Copyright Notice
   *
   * Some or all of this work - Copyright (c) 1999 - 2014, 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 __EXSTOREN_C__
  
  #include "acpi.h"
  #include "accommon.h"
  #include "acinterp.h"
  #include "amlcode.h"
  
  
  #define _COMPONENT          ACPI_EXECUTER
          ACPI_MODULE_NAME    ("exstoren")
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiExResolveObject
   *
   * PARAMETERS:  SourceDescPtr       - Pointer to the source object
   *              TargetType          - Current type of the target
   *              WalkState           - Current walk state
   *
   * RETURN:      Status, resolved object in SourceDescPtr.
   *
   * DESCRIPTION: Resolve an object. If the object is a reference, dereference
   *              it and return the actual object in the SourceDescPtr.
   *
   ******************************************************************************/
  
  ACPI_STATUS
  AcpiExResolveObject (
      ACPI_OPERAND_OBJECT     **SourceDescPtr,
      ACPI_OBJECT_TYPE        TargetType,
      ACPI_WALK_STATE         *WalkState)
  {
      ACPI_OPERAND_OBJECT     *SourceDesc = *SourceDescPtr;
      ACPI_STATUS             Status = AE_OK;
  
  
      ACPI_FUNCTION_TRACE (ExResolveObject);
  
  
      /* Ensure we have a Target that can be stored to */
  
      switch (TargetType)
      {
      case ACPI_TYPE_BUFFER_FIELD:
      case ACPI_TYPE_LOCAL_REGION_FIELD:
      case ACPI_TYPE_LOCAL_BANK_FIELD:
      case ACPI_TYPE_LOCAL_INDEX_FIELD:
          /*
           * These cases all require only Integers or values that
           * can be converted to Integers (Strings or Buffers)
           */
      case ACPI_TYPE_INTEGER:
      case ACPI_TYPE_STRING:
      case ACPI_TYPE_BUFFER:
          /*
           * Stores into a Field/Region or into a Integer/Buffer/String
           * are all essentially the same. This case handles the
           * "interchangeable" types Integer, String, and Buffer.
           */
          if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
          {
              /* Resolve a reference object first */
  
              Status = AcpiExResolveToValue (SourceDescPtr, WalkState);
              if (ACPI_FAILURE (Status))
              {
                  break;
              }
          }
  
          /* For CopyObject, no further validation necessary */
  
          if (WalkState->Opcode == AML_COPY_OP)
          {
              break;
          }
  
          /* Must have a Integer, Buffer, or String */
  
          if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER)    &&
              (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)     &&
              (SourceDesc->Common.Type != ACPI_TYPE_STRING)     &&
              !((SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                      (SourceDesc->Reference.Class== ACPI_REFCLASS_TABLE)))
          {
              /* Conversion successful but still not a valid type */
  
              ACPI_ERROR ((AE_INFO,
                  "Cannot assign type %s to %s (must be type Int/Str/Buf)",
                  AcpiUtGetObjectTypeName (SourceDesc),
                  AcpiUtGetTypeName (TargetType)));
              Status = AE_AML_OPERAND_TYPE;
          }
          break;
  
      case ACPI_TYPE_LOCAL_ALIAS:
      case ACPI_TYPE_LOCAL_METHOD_ALIAS:
          /*
           * All aliases should have been resolved earlier, during the
           * operand resolution phase.
           */
          ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object"));
          Status = AE_AML_INTERNAL;
          break;
  
      case ACPI_TYPE_PACKAGE:
      default:
          /*
           * All other types than Alias and the various Fields come here,
           * including the untyped case - ACPI_TYPE_ANY.
           */
          break;
      }
  
      return_ACPI_STATUS (Status);
  }
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiExStoreObjectToObject
   *
   * PARAMETERS:  SourceDesc          - Object to store
   *              DestDesc            - Object to receive a copy of the source
   *              NewDesc             - New object if DestDesc is obsoleted
   *              WalkState           - Current walk state
   *
   * RETURN:      Status
   *
   * DESCRIPTION: "Store" an object to another object. This may include
   *              converting the source type to the target type (implicit
   *              conversion), and a copy of the value of the source to
   *              the target.
   *
   *              The Assignment of an object to another (not named) object
   *              is handled here.
   *              The Source 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.
   *
   *              This module allows destination types of Number, String,
   *              Buffer, and Package.
   *
   *              Assumes parameters are already validated. NOTE: SourceDesc
   *              resolution (from a reference object) must be performed by
   *              the caller if necessary.
   *
   ******************************************************************************/
  
  ACPI_STATUS
  AcpiExStoreObjectToObject (
      ACPI_OPERAND_OBJECT     *SourceDesc,
      ACPI_OPERAND_OBJECT     *DestDesc,
      ACPI_OPERAND_OBJECT     **NewDesc,
      ACPI_WALK_STATE         *WalkState)
  {
      ACPI_OPERAND_OBJECT     *ActualSrcDesc;
      ACPI_STATUS             Status = AE_OK;
  
  
      ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToObject, SourceDesc);
  
  
      ActualSrcDesc = SourceDesc;
      if (!DestDesc)
      {
          /*
           * There is no destination object (An uninitialized node or
           * package element), so we can simply copy the source object
           * creating a new destination object
           */
          Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState);
          return_ACPI_STATUS (Status);
      }
  
      if (SourceDesc->Common.Type != DestDesc->Common.Type)
      {
          /*
           * The source type does not match the type of the destination.
           * Perform the "implicit conversion" of the source to the current type
           * of the target as per the ACPI specification.
           *
           * If no conversion performed, ActualSrcDesc = SourceDesc.
           * Otherwise, ActualSrcDesc is a temporary object to hold the
           * converted object.
           */
          Status = AcpiExConvertToTargetType (DestDesc->Common.Type,
                          SourceDesc, &ActualSrcDesc, WalkState);
          if (ACPI_FAILURE (Status))
          {
              return_ACPI_STATUS (Status);
          }
  
          if (SourceDesc == ActualSrcDesc)
          {
              /*
               * No conversion was performed. Return the SourceDesc as the
               * new object.
               */
              *NewDesc = SourceDesc;
              return_ACPI_STATUS (AE_OK);
          }
      }
  
      /*
       * We now have two objects of identical types, and we can perform a
       * copy of the *value* of the source object.
       */
      switch (DestDesc->Common.Type)
      {
      case ACPI_TYPE_INTEGER:
  
          DestDesc->Integer.Value = ActualSrcDesc->Integer.Value;
  
          /* Truncate value if we are executing from a 32-bit ACPI table */
  
          (void) AcpiExTruncateFor32bitTable (DestDesc);
          break;
  
      case ACPI_TYPE_STRING:
  
          Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc);
          break;
  
      case ACPI_TYPE_BUFFER:
  
          Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc);
          break;
  
      case ACPI_TYPE_PACKAGE:
  
          Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc,
                      WalkState);
          break;
  
      default:
          /*
           * All other types come here.
           */
          ACPI_WARNING ((AE_INFO, "Store into type %s not implemented",
              AcpiUtGetObjectTypeName (DestDesc)));
  
          Status = AE_NOT_IMPLEMENTED;
          break;
      }
  
      if (ActualSrcDesc != SourceDesc)
      {
          /* Delete the intermediate (temporary) source object */
  
          AcpiUtRemoveReference (ActualSrcDesc);
      }
  
      *NewDesc = DestDesc;
      return_ACPI_STATUS (Status);
  }
  