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

     /******************************************************************************
      *
      * Module Name: utxface - External interfaces, miscellaneous utility functions
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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.
    *
    *****************************************************************************/
   
   #define EXPORT_ACPI_INTERFACES
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acdebug.h>
   
   #define _COMPONENT          ACPI_UTILITIES
           ACPI_MODULE_NAME    ("utxface")
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTerminate
    *
    * PARAMETERS:  None
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
    *
    ******************************************************************************/
   
   ACPI_STATUS ACPI_INIT_FUNCTION
   AcpiTerminate (
       void)
   {
       ACPI_STATUS         Status;
   
   
       ACPI_FUNCTION_TRACE (AcpiTerminate);
   
   
       /* Shutdown and free all resources */
   
       AcpiUtSubsystemShutdown ();
   
       /* Free the mutex objects */
   
       AcpiUtMutexTerminate ();
   
       /* Now we can shutdown the OS-dependent layer */
   
       Status = AcpiOsTerminate ();
       return_ACPI_STATUS (Status);
   }
   
   ACPI_EXPORT_SYMBOL_INIT (AcpiTerminate)
   
   
   #ifndef ACPI_ASL_COMPILER
   /*******************************************************************************
    *
    * FUNCTION:    AcpiSubsystemStatus
    *
    * PARAMETERS:  None
    *
    * RETURN:      Status of the ACPI subsystem
    *
    * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
    *              before making any other calls, to ensure the subsystem
    *              initialized successfully.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiSubsystemStatus (
       void)
   {
   
       if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK)
       {
           return (AE_OK);
       }
       else
       {
           return (AE_ERROR);
       }
   }
   
   ACPI_EXPORT_SYMBOL (AcpiSubsystemStatus)
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiGetSystemInfo
    *
    * PARAMETERS:  OutBuffer       - A buffer to receive the resources for the
    *                                device
    *
    * RETURN:      Status          - the status of the call
    *
    * DESCRIPTION: This function is called to get information about the current
    *              state of the ACPI subsystem. It will return system information
    *              in the OutBuffer.
    *
    *              If the function fails an appropriate status will be returned
    *              and the value of OutBuffer is undefined.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiGetSystemInfo (
       ACPI_BUFFER             *OutBuffer)
   {
       ACPI_SYSTEM_INFO        *InfoPtr;
       ACPI_STATUS             Status;
   
   
       ACPI_FUNCTION_TRACE (AcpiGetSystemInfo);
   
   
       /* Parameter validation */
   
       Status = AcpiUtValidateBuffer (OutBuffer);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /* Validate/Allocate/Clear caller buffer */
   
       Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO));
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /*
        * Populate the return buffer
        */
       InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer;
       InfoPtr->AcpiCaVersion = ACPI_CA_VERSION;
   
       /* System flags (ACPI capabilities) */
   
       InfoPtr->Flags = ACPI_SYS_MODE_ACPI;
   
       /* Timer resolution - 24 or 32 bits  */
   
       if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
       {
           InfoPtr->TimerResolution = 24;
       }
       else
       {
           InfoPtr->TimerResolution = 32;
       }
   
       /* Clear the reserved fields */
   
       InfoPtr->Reserved1 = 0;
       InfoPtr->Reserved2 = 0;
   
       /* Current debug levels */
   
       InfoPtr->DebugLayer = AcpiDbgLayer;
       InfoPtr->DebugLevel = AcpiDbgLevel;
   
       return_ACPI_STATUS (AE_OK);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiGetSystemInfo)
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiGetStatistics
    *
    * PARAMETERS:  Stats           - Where the statistics are returned
    *
    * RETURN:      Status          - the status of the call
    *
    * DESCRIPTION: Get the contents of the various system counters
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiGetStatistics (
       ACPI_STATISTICS         *Stats)
   {
       ACPI_FUNCTION_TRACE (AcpiGetStatistics);
   
   
       /* Parameter validation */
   
       if (!Stats)
       {
           return_ACPI_STATUS (AE_BAD_PARAMETER);
       }
   
       /* Various interrupt-based event counters */
   
       Stats->SciCount = AcpiSciCount;
       Stats->GpeCount = AcpiGpeCount;
   
       memcpy (Stats->FixedEventCount, AcpiFixedEventCount,
           sizeof (AcpiFixedEventCount));
   
       /* Other counters */
   
       Stats->MethodCount = AcpiMethodCount;
       return_ACPI_STATUS (AE_OK);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiGetStatistics)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiInstallInitializationHandler
    *
    * PARAMETERS:  Handler             - Callback procedure
    *              Function            - Not (currently) used, see below
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Install an initialization handler
    *
    * TBD: When a second function is added, must save the Function also.
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiInstallInitializationHandler (
       ACPI_INIT_HANDLER       Handler,
       UINT32                  Function)
   {
   
       if (!Handler)
       {
           return (AE_BAD_PARAMETER);
       }
   
       if (AcpiGbl_InitHandler)
       {
           return (AE_ALREADY_EXISTS);
       }
   
       AcpiGbl_InitHandler = Handler;
       return (AE_OK);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiInstallInitializationHandler)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiPurgeCachedObjects
    *
    * PARAMETERS:  None
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Empty all caches (delete the cached objects)
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiPurgeCachedObjects (
       void)
   {
       ACPI_FUNCTION_TRACE (AcpiPurgeCachedObjects);
   
   
       (void) AcpiOsPurgeCache (AcpiGbl_StateCache);
       (void) AcpiOsPurgeCache (AcpiGbl_OperandCache);
       (void) AcpiOsPurgeCache (AcpiGbl_PsNodeCache);
       (void) AcpiOsPurgeCache (AcpiGbl_PsNodeExtCache);
   
       return_ACPI_STATUS (AE_OK);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiPurgeCachedObjects)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiInstallInterface
    *
    * PARAMETERS:  InterfaceName       - The interface to install
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Install an _OSI interface to the global list
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiInstallInterface (
       ACPI_STRING             InterfaceName)
   {
       ACPI_STATUS             Status;
       ACPI_INTERFACE_INFO     *InterfaceInfo;
   
   
       /* Parameter validation */
   
       if (!InterfaceName || (strlen (InterfaceName) == 0))
       {
           return (AE_BAD_PARAMETER);
       }
   
       Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
       if (ACPI_FAILURE (Status))
       {
           return (Status);
       }
   
       /* Check if the interface name is already in the global list */
   
       InterfaceInfo = AcpiUtGetInterface (InterfaceName);
       if (InterfaceInfo)
       {
           /*
            * The interface already exists in the list. This is OK if the
            * interface has been marked invalid -- just clear the bit.
            */
           if (InterfaceInfo->Flags & ACPI_OSI_INVALID)
           {
               InterfaceInfo->Flags &= ~ACPI_OSI_INVALID;
               Status = AE_OK;
           }
           else
           {
               Status = AE_ALREADY_EXISTS;
           }
       }
       else
       {
           /* New interface name, install into the global list */
   
           Status = AcpiUtInstallInterface (InterfaceName);
       }
   
       AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
       return (Status);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiInstallInterface)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiRemoveInterface
    *
    * PARAMETERS:  InterfaceName       - The interface to remove
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Remove an _OSI interface from the global list
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiRemoveInterface (
       ACPI_STRING             InterfaceName)
   {
       ACPI_STATUS             Status;
   
   
       /* Parameter validation */
   
       if (!InterfaceName || (strlen (InterfaceName) == 0))
       {
           return (AE_BAD_PARAMETER);
       }
   
       Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
       if (ACPI_FAILURE (Status))
       {
           return (Status);
       }
   
       Status = AcpiUtRemoveInterface (InterfaceName);
   
       AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
       return (Status);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiRemoveInterface)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiInstallInterfaceHandler
    *
    * PARAMETERS:  Handler             - The _OSI interface handler to install
    *                                    NULL means "remove existing handler"
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
    *              invoked during execution of the internal implementation of
    *              _OSI. A NULL handler simply removes any existing handler.
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiInstallInterfaceHandler (
       ACPI_INTERFACE_HANDLER  Handler)
   {
       ACPI_STATUS             Status;
   
   
       Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
       if (ACPI_FAILURE (Status))
       {
           return (Status);
       }
   
       if (Handler && AcpiGbl_InterfaceHandler)
       {
           Status = AE_ALREADY_EXISTS;
       }
       else
       {
           AcpiGbl_InterfaceHandler = Handler;
       }
   
       AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
       return (Status);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiInstallInterfaceHandler)
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiUpdateInterfaces
    *
    * PARAMETERS:  Action              - Actions to be performed during the
    *                                    update
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
    *              string or/and feature group strings.
    *
    ****************************************************************************/
   
   ACPI_STATUS
   AcpiUpdateInterfaces (
       UINT8                   Action)
   {
       ACPI_STATUS             Status;
   
   
       Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
       if (ACPI_FAILURE (Status))
       {
           return (Status);
       }
   
       Status = AcpiUtUpdateInterfaces (Action);
   
       AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
       return (Status);
   }
   
   
   /*****************************************************************************
    *
    * FUNCTION:    AcpiCheckAddressRange
    *
    * PARAMETERS:  SpaceId             - Address space ID
    *              Address             - Start address
    *              Length              - Length
    *              Warn                - TRUE if warning on overlap desired
    *
    * RETURN:      Count of the number of conflicts detected.
    *
    * DESCRIPTION: Check if the input address range overlaps any of the
    *              ASL operation region address ranges.
    *
    ****************************************************************************/
   
   UINT32
   AcpiCheckAddressRange (
       ACPI_ADR_SPACE_TYPE     SpaceId,
       ACPI_PHYSICAL_ADDRESS   Address,
       ACPI_SIZE               Length,
       BOOLEAN                 Warn)
   {
       UINT32                  Overlaps;
       ACPI_STATUS             Status;
   
   
       Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
       if (ACPI_FAILURE (Status))
       {
           return (0);
       }
   
       Overlaps = AcpiUtCheckAddressRange (SpaceId, Address,
           (UINT32) Length, Warn);
   
       (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
       return (Overlaps);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiCheckAddressRange)
   
   #endif /* !ACPI_ASL_COMPILER */
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDecodePldBuffer
    *
    * PARAMETERS:  InBuffer            - Buffer returned by _PLD method
    *              Length              - Length of the InBuffer
    *              ReturnBuffer        - Where the decode buffer is returned
    *
    * RETURN:      Status and the decoded _PLD buffer. User must deallocate
    *              the buffer via ACPI_FREE.
    *
    * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
    *              a local struct that is much more useful to an ACPI driver.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiDecodePldBuffer (
       UINT8                   *InBuffer,
       ACPI_SIZE               Length,
       ACPI_PLD_INFO           **ReturnBuffer)
   {
       ACPI_PLD_INFO           *PldInfo;
       UINT32                  *Buffer = ACPI_CAST_PTR (UINT32, InBuffer);
       UINT32                  Dword;
   
   
       /* Parameter validation */
   
       if (!InBuffer || !ReturnBuffer || (Length < ACPI_PLD_REV1_BUFFER_SIZE))
       {
           return (AE_BAD_PARAMETER);
       }
   
       PldInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PLD_INFO));
       if (!PldInfo)
       {
           return (AE_NO_MEMORY);
       }
   
       /* First 32-bit DWord */
   
       ACPI_MOVE_32_TO_32 (&Dword, &Buffer[0]);
       PldInfo->Revision =             ACPI_PLD_GET_REVISION (&Dword);
       PldInfo->IgnoreColor =          ACPI_PLD_GET_IGNORE_COLOR (&Dword);
       PldInfo->Red =                  ACPI_PLD_GET_RED (&Dword);
       PldInfo->Green =                ACPI_PLD_GET_GREEN (&Dword);
       PldInfo->Blue =                 ACPI_PLD_GET_BLUE (&Dword);
   
       /* Second 32-bit DWord */
   
       ACPI_MOVE_32_TO_32 (&Dword, &Buffer[1]);
       PldInfo->Width =                ACPI_PLD_GET_WIDTH (&Dword);
       PldInfo->Height =               ACPI_PLD_GET_HEIGHT(&Dword);
   
       /* Third 32-bit DWord */
   
       ACPI_MOVE_32_TO_32 (&Dword, &Buffer[2]);
       PldInfo->UserVisible =          ACPI_PLD_GET_USER_VISIBLE (&Dword);
       PldInfo->Dock =                 ACPI_PLD_GET_DOCK (&Dword);
       PldInfo->Lid =                  ACPI_PLD_GET_LID (&Dword);
       PldInfo->Panel =                ACPI_PLD_GET_PANEL (&Dword);
       PldInfo->VerticalPosition =     ACPI_PLD_GET_VERTICAL (&Dword);
       PldInfo->HorizontalPosition =   ACPI_PLD_GET_HORIZONTAL (&Dword);
       PldInfo->Shape =                ACPI_PLD_GET_SHAPE (&Dword);
       PldInfo->GroupOrientation =     ACPI_PLD_GET_ORIENTATION (&Dword);
       PldInfo->GroupToken =           ACPI_PLD_GET_TOKEN (&Dword);
       PldInfo->GroupPosition =        ACPI_PLD_GET_POSITION (&Dword);
       PldInfo->Bay =                  ACPI_PLD_GET_BAY (&Dword);
   
       /* Fourth 32-bit DWord */
   
       ACPI_MOVE_32_TO_32 (&Dword, &Buffer[3]);
       PldInfo->Ejectable =            ACPI_PLD_GET_EJECTABLE (&Dword);
       PldInfo->OspmEjectRequired =    ACPI_PLD_GET_OSPM_EJECT (&Dword);
       PldInfo->CabinetNumber =        ACPI_PLD_GET_CABINET (&Dword);
       PldInfo->CardCageNumber =       ACPI_PLD_GET_CARD_CAGE (&Dword);
       PldInfo->Reference =            ACPI_PLD_GET_REFERENCE (&Dword);
       PldInfo->Rotation =             ACPI_PLD_GET_ROTATION (&Dword);
       PldInfo->Order =                ACPI_PLD_GET_ORDER (&Dword);
   
       if (Length >= ACPI_PLD_REV2_BUFFER_SIZE)
       {
           /* Fifth 32-bit DWord (Revision 2 of _PLD) */
   
           ACPI_MOVE_32_TO_32 (&Dword, &Buffer[4]);
           PldInfo->VerticalOffset =       ACPI_PLD_GET_VERT_OFFSET (&Dword);
           PldInfo->HorizontalOffset =     ACPI_PLD_GET_HORIZ_OFFSET (&Dword);
       }
   
       *ReturnBuffer = PldInfo;
       return (AE_OK);
   }
   
   ACPI_EXPORT_SYMBOL (AcpiDecodePldBuffer)

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