FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/utilities/utobject.c

     /******************************************************************************
      *
      * Module Name: utobject - ACPI object create/delete/size/cache routines
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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/acnamesp.h>
   
   
   #define _COMPONENT          ACPI_UTILITIES
           ACPI_MODULE_NAME    ("utobject")
   
   /* Local prototypes */
   
   static ACPI_STATUS
   AcpiUtGetSimpleObjectSize (
       ACPI_OPERAND_OBJECT     *Obj,
       ACPI_SIZE               *ObjLength);
   
   static ACPI_STATUS
   AcpiUtGetPackageObjectSize (
       ACPI_OPERAND_OBJECT     *Obj,
       ACPI_SIZE               *ObjLength);
   
   static ACPI_STATUS
   AcpiUtGetElementLength (
       UINT8                   ObjectType,
       ACPI_OPERAND_OBJECT     *SourceObject,
       ACPI_GENERIC_STATE      *State,
       void                    *Context);
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtCreateInternalObjectDbg
    *
    * PARAMETERS:  ModuleName          - Source file name of caller
    *              LineNumber          - Line number of caller
    *              ComponentId         - Component type of caller
    *              Type                - ACPI Type of the new object
    *
    * RETURN:      A new internal object, null on failure
    *
    * DESCRIPTION: Create and initialize a new internal object.
    *
    * NOTE:        We always allocate the worst-case object descriptor because
    *              these objects are cached, and we want them to be
    *              one-size-satisfies-any-request. This in itself may not be
    *              the most memory efficient, but the efficiency of the object
    *              cache should more than make up for this!
    *
    ******************************************************************************/
   
   ACPI_OPERAND_OBJECT  *
   AcpiUtCreateInternalObjectDbg (
       const char              *ModuleName,
       UINT32                  LineNumber,
       UINT32                  ComponentId,
       ACPI_OBJECT_TYPE        Type)
   {
       ACPI_OPERAND_OBJECT     *Object;
       ACPI_OPERAND_OBJECT     *SecondObject;
   
   
       ACPI_FUNCTION_TRACE_STR (UtCreateInternalObjectDbg,
           AcpiUtGetTypeName (Type));
   
   
       /* Allocate the raw object descriptor */
   
       Object = AcpiUtAllocateObjectDescDbg (
           ModuleName, LineNumber, ComponentId);
       if (!Object)
       {
           return_PTR (NULL);
       }
   
       switch (Type)
       {
       case ACPI_TYPE_REGION:
       case ACPI_TYPE_BUFFER_FIELD:
       case ACPI_TYPE_LOCAL_BANK_FIELD:
   
           /* These types require a secondary object */
   
           SecondObject = AcpiUtAllocateObjectDescDbg (
               ModuleName, LineNumber, ComponentId);
           if (!SecondObject)
           {
               AcpiUtDeleteObjectDesc (Object);
               return_PTR (NULL);
           }
   
           SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
           SecondObject->Common.ReferenceCount = 1;
   
           /* Link the second object to the first */
   
           Object->Common.NextObject = SecondObject;
           break;
   
       default:
   
           /* All others have no secondary object */
           break;
       }
   
       /* Save the object type in the object descriptor */
   
       Object->Common.Type = (UINT8) Type;
   
       /* Init the reference count */
   
       Object->Common.ReferenceCount = 1;
   
       /* Any per-type initialization should go here */
   
       return_PTR (Object);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtCreatePackageObject
    *
    * PARAMETERS:  Count               - Number of package elements
    *
    * RETURN:      Pointer to a new Package object, null on failure
    *
    * DESCRIPTION: Create a fully initialized package object
    *
    ******************************************************************************/
   
   ACPI_OPERAND_OBJECT *
   AcpiUtCreatePackageObject (
       UINT32                  Count)
   {
       ACPI_OPERAND_OBJECT     *PackageDesc;
       ACPI_OPERAND_OBJECT     **PackageElements;
   
   
       ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
   
   
       /* Create a new Package object */
   
       PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
       if (!PackageDesc)
       {
           return_PTR (NULL);
       }
   
       /*
        * Create the element array. Count+1 allows the array to be null
        * terminated.
        */
       PackageElements = ACPI_ALLOCATE_ZEROED (
           ((ACPI_SIZE) Count + 1) * sizeof (void *));
       if (!PackageElements)
       {
           ACPI_FREE (PackageDesc);
           return_PTR (NULL);
       }
   
       PackageDesc->Package.Count = Count;
       PackageDesc->Package.Elements = PackageElements;
       return_PTR (PackageDesc);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtCreateIntegerObject
    *
    * PARAMETERS:  InitialValue        - Initial value for the integer
    *
    * RETURN:      Pointer to a new Integer object, null on failure
    *
    * DESCRIPTION: Create an initialized integer object
    *
    ******************************************************************************/
   
   ACPI_OPERAND_OBJECT *
   AcpiUtCreateIntegerObject (
       UINT64                  InitialValue)
   {
       ACPI_OPERAND_OBJECT     *IntegerDesc;
   
   
       ACPI_FUNCTION_TRACE (UtCreateIntegerObject);
   
   
       /* Create and initialize a new integer object */
   
       IntegerDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
       if (!IntegerDesc)
       {
           return_PTR (NULL);
       }
   
       IntegerDesc->Integer.Value = InitialValue;
       return_PTR (IntegerDesc);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtCreateBufferObject
    *
    * PARAMETERS:  BufferSize             - Size of buffer to be created
    *
    * RETURN:      Pointer to a new Buffer object, null on failure
    *
    * DESCRIPTION: Create a fully initialized buffer object
    *
    ******************************************************************************/
   
   ACPI_OPERAND_OBJECT *
   AcpiUtCreateBufferObject (
       ACPI_SIZE               BufferSize)
   {
       ACPI_OPERAND_OBJECT     *BufferDesc;
       UINT8                   *Buffer = NULL;
   
   
       ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
   
   
       /* Create a new Buffer object */
   
       BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
       if (!BufferDesc)
       {
           return_PTR (NULL);
       }
   
       /* Create an actual buffer only if size > 0 */
   
       if (BufferSize > 0)
       {
           /* Allocate the actual buffer */
   
           Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
           if (!Buffer)
           {
               ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
                   (UINT32) BufferSize));
   
               AcpiUtRemoveReference (BufferDesc);
               return_PTR (NULL);
           }
       }
   
       /* Complete buffer object initialization */
   
       BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
       BufferDesc->Buffer.Pointer = Buffer;
       BufferDesc->Buffer.Length = (UINT32) BufferSize;
   
       /* Return the new buffer descriptor */
   
       return_PTR (BufferDesc);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtCreateStringObject
    *
    * PARAMETERS:  StringSize          - Size of string to be created. Does not
    *                                    include NULL terminator, this is added
    *                                    automatically.
    *
    * RETURN:      Pointer to a new String object
    *
    * DESCRIPTION: Create a fully initialized string object
    *
    ******************************************************************************/
   
   ACPI_OPERAND_OBJECT *
   AcpiUtCreateStringObject (
       ACPI_SIZE               StringSize)
   {
       ACPI_OPERAND_OBJECT     *StringDesc;
       char                    *String;
   
   
       ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
   
   
       /* Create a new String object */
   
       StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
       if (!StringDesc)
       {
           return_PTR (NULL);
       }
   
       /*
        * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
        * NOTE: Zero-length strings are NULL terminated
        */
       String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
       if (!String)
       {
           ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
               (UINT32) StringSize));
   
           AcpiUtRemoveReference (StringDesc);
           return_PTR (NULL);
       }
   
       /* Complete string object initialization */
   
       StringDesc->String.Pointer = String;
       StringDesc->String.Length = (UINT32) StringSize;
   
       /* Return the new string descriptor */
   
       return_PTR (StringDesc);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtValidInternalObject
    *
    * PARAMETERS:  Object              - Object to be validated
    *
    * RETURN:      TRUE if object is valid, FALSE otherwise
    *
    * DESCRIPTION: Validate a pointer to be of type ACPI_OPERAND_OBJECT
    *
    ******************************************************************************/
   
   BOOLEAN
   AcpiUtValidInternalObject (
       void                    *Object)
   {
   
       ACPI_FUNCTION_NAME (UtValidInternalObject);
   
   
       /* Check for a null pointer */
   
       if (!Object)
       {
           ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
           return (FALSE);
       }
   
       /* Check the descriptor type field */
   
       switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
       {
       case ACPI_DESC_TYPE_OPERAND:
   
           /* The object appears to be a valid ACPI_OPERAND_OBJECT */
   
           return (TRUE);
   
       default:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
               "%p is not an ACPI operand obj [%s]\n",
               Object, AcpiUtGetDescriptorName (Object)));
           break;
       }
   
       return (FALSE);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtAllocateObjectDescDbg
    *
    * PARAMETERS:  ModuleName          - Caller's module name (for error output)
    *              LineNumber          - Caller's line number (for error output)
    *              ComponentId         - Caller's component ID (for error output)
    *
    * RETURN:      Pointer to newly allocated object descriptor. Null on error
    *
    * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
    *              error conditions.
    *
    ******************************************************************************/
   
   void *
   AcpiUtAllocateObjectDescDbg (
       const char              *ModuleName,
       UINT32                  LineNumber,
       UINT32                  ComponentId)
   {
       ACPI_OPERAND_OBJECT     *Object;
   
   
       ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
   
   
       Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
       if (!Object)
       {
           ACPI_ERROR ((ModuleName, LineNumber,
               "Could not allocate an object descriptor"));
   
           return_PTR (NULL);
       }
   
       /* Mark the descriptor type */
   
       ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
   
       ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
           Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
   
       return_PTR (Object);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtDeleteObjectDesc
    *
    * PARAMETERS:  Object          - An Acpi internal object to be deleted
    *
    * RETURN:      None.
    *
    * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
    *
    ******************************************************************************/
   
   void
   AcpiUtDeleteObjectDesc (
       ACPI_OPERAND_OBJECT     *Object)
   {
       ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
   
   
       /* Object must be of type ACPI_OPERAND_OBJECT */
   
       if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
       {
           ACPI_ERROR ((AE_INFO,
               "%p is not an ACPI Operand object [%s]", Object,
               AcpiUtGetDescriptorName (Object)));
           return_VOID;
       }
   
       (void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
       return_VOID;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtGetSimpleObjectSize
    *
    * PARAMETERS:  InternalObject     - An ACPI operand object
    *              ObjLength          - Where the length is returned
    *
    * RETURN:      Status
    *
    * DESCRIPTION: This function is called to determine the space required to
    *              contain a simple object for return to an external user.
    *
    *              The length includes the object structure plus any additional
    *              needed space.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiUtGetSimpleObjectSize (
       ACPI_OPERAND_OBJECT     *InternalObject,
       ACPI_SIZE               *ObjLength)
   {
       ACPI_SIZE               Length;
       ACPI_SIZE               Size;
       ACPI_STATUS             Status = AE_OK;
   
   
       ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
   
   
       /* Start with the length of the (external) Acpi object */
   
       Length = sizeof (ACPI_OBJECT);
   
       /* A NULL object is allowed, can be a legal uninitialized package element */
   
       if (!InternalObject)
       {
           /*
            * Object is NULL, just return the length of ACPI_OBJECT
            * (A NULL ACPI_OBJECT is an object of all zeroes.)
            */
           *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
           return_ACPI_STATUS (AE_OK);
       }
   
       /* A Namespace Node should never appear here */
   
       if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
       {
           /* A namespace node should never get here */
   
           ACPI_ERROR ((AE_INFO,
               "Received a namespace node [%4.4s] "
               "where an operand object is required",
               ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, InternalObject)->Name.Ascii));
           return_ACPI_STATUS (AE_AML_INTERNAL);
       }
   
       /*
        * The final length depends on the object type
        * Strings and Buffers are packed right up against the parent object and
        * must be accessed bytewise or there may be alignment problems on
        * certain processors
        */
       switch (InternalObject->Common.Type)
       {
       case ACPI_TYPE_STRING:
   
           Length += (ACPI_SIZE) InternalObject->String.Length + 1;
           break;
   
       case ACPI_TYPE_BUFFER:
   
           Length += (ACPI_SIZE) InternalObject->Buffer.Length;
           break;
   
       case ACPI_TYPE_INTEGER:
       case ACPI_TYPE_PROCESSOR:
       case ACPI_TYPE_POWER:
   
           /* No extra data for these types */
   
           break;
   
       case ACPI_TYPE_LOCAL_REFERENCE:
   
           switch (InternalObject->Reference.Class)
           {
           case ACPI_REFCLASS_NAME:
               /*
                * Get the actual length of the full pathname to this object.
                * The reference will be converted to the pathname to the object
                */
               Size = AcpiNsGetPathnameLength (InternalObject->Reference.Node);
               if (!Size)
               {
                   return_ACPI_STATUS (AE_BAD_PARAMETER);
               }
   
               Length += ACPI_ROUND_UP_TO_NATIVE_WORD (Size);
               break;
   
           default:
               /*
                * No other reference opcodes are supported.
                * Notably, Locals and Args are not supported, but this may be
                * required eventually.
                */
               ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
                   "unsupported Reference Class [%s] 0x%X in object %p",
                   AcpiUtGetReferenceName (InternalObject),
                   InternalObject->Reference.Class, InternalObject));
               Status = AE_TYPE;
               break;
           }
           break;
   
       default:
   
           ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
               "unsupported type [%s] 0x%X in object %p",
               AcpiUtGetObjectTypeName (InternalObject),
               InternalObject->Common.Type, InternalObject));
           Status = AE_TYPE;
           break;
       }
   
       /*
        * Account for the space required by the object rounded up to the next
        * multiple of the machine word size. This keeps each object aligned
        * on a machine word boundary. (preventing alignment faults on some
        * machines.)
        */
       *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtGetElementLength
    *
    * PARAMETERS:  ACPI_PKG_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Get the length of one package element.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiUtGetElementLength (
       UINT8                   ObjectType,
       ACPI_OPERAND_OBJECT     *SourceObject,
       ACPI_GENERIC_STATE      *State,
       void                    *Context)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_PKG_INFO           *Info = (ACPI_PKG_INFO *) Context;
       ACPI_SIZE               ObjectSpace;
   
   
       switch (ObjectType)
       {
       case ACPI_COPY_TYPE_SIMPLE:
           /*
            * Simple object - just get the size (Null object/entry is handled
            * here also) and sum it into the running package length
            */
           Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
           if (ACPI_FAILURE (Status))
           {
               return (Status);
           }
   
           Info->Length += ObjectSpace;
           break;
   
       case ACPI_COPY_TYPE_PACKAGE:
   
           /* Package object - nothing much to do here, let the walk handle it */
   
           Info->NumPackages++;
           State->Pkg.ThisTargetObj = NULL;
           break;
   
       default:
   
           /* No other types allowed */
   
           return (AE_BAD_PARAMETER);
       }
   
       return (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtGetPackageObjectSize
    *
    * PARAMETERS:  InternalObject      - An ACPI internal object
    *              ObjLength           - Where the length is returned
    *
    * RETURN:      Status
    *
    * DESCRIPTION: This function is called to determine the space required to
    *              contain a package object for return to an external user.
    *
    *              This is moderately complex since a package contains other
    *              objects including packages.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiUtGetPackageObjectSize (
       ACPI_OPERAND_OBJECT     *InternalObject,
       ACPI_SIZE               *ObjLength)
   {
       ACPI_STATUS             Status;
       ACPI_PKG_INFO           Info;
   
   
       ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
   
   
       Info.Length = 0;
       Info.ObjectSpace = 0;
       Info.NumPackages = 1;
   
       Status = AcpiUtWalkPackageTree (
           InternalObject, NULL, AcpiUtGetElementLength, &Info);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /*
        * We have handled all of the objects in all levels of the package.
        * just add the length of the package objects themselves.
        * Round up to the next machine word.
        */
       Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (
           sizeof (ACPI_OBJECT)) * (ACPI_SIZE) Info.NumPackages;
   
       /* Return the total package length */
   
       *ObjLength = Info.Length;
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtGetObjectSize
    *
    * PARAMETERS:  InternalObject      - An ACPI internal object
    *              ObjLength           - Where the length will be returned
    *
    * RETURN:      Status
    *
    * DESCRIPTION: This function is called to determine the space required to
    *              contain an object for return to an API user.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiUtGetObjectSize (
       ACPI_OPERAND_OBJECT     *InternalObject,
       ACPI_SIZE               *ObjLength)
   {
       ACPI_STATUS             Status;
   
   
       ACPI_FUNCTION_ENTRY ();
   
   
       if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) ==
               ACPI_DESC_TYPE_OPERAND) &&
           (InternalObject->Common.Type == ACPI_TYPE_PACKAGE))
       {
           Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
       }
       else
       {
           Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);
       }
   
       return (Status);
   }

Cache object: 1441834581bf88e2bc6c504003254052