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/******************************************************************************

 *

 * Module Name: aehandlers - Various handlers for acpiexec

 *

 *****************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2010, 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.

 *

 *****************************************************************************/

#include "aecommon.h"

#define _COMPONENT          ACPI_TOOLS

        ACPI_MODULE_NAME    ("aehandlers")

/* Local prototypes */

void

AeNotifyHandler (

    ACPI_HANDLE             Device,

    UINT32                  Value,

    void                    *Context);

void

AeDeviceNotifyHandler (

    ACPI_HANDLE             Device,

    UINT32                  Value,

    void                    *Context);

ACPI_STATUS

AeExceptionHandler (

    ACPI_STATUS             AmlStatus,

    ACPI_NAME               Name,

    UINT16                  Opcode,

    UINT32                  AmlOffset,

    void                    *Context);

ACPI_STATUS

AeTableHandler (

    UINT32                  Event,

    void                    *Table,

    void                    *Context);

ACPI_STATUS

AeRegionInit (

    ACPI_HANDLE             RegionHandle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext);

void

AeAttachedDataHandler (

    ACPI_HANDLE             Object,

    void                    *Data);

UINT32                      SigintCount = 0;

AE_DEBUG_REGIONS            AeRegions;

/******************************************************************************

 *

 * FUNCTION:    AeCtrlCHandler

 *

 * PARAMETERS:  Sig

 *

 * RETURN:      none

 *

 * DESCRIPTION: Control-C handler.  Abort running control method if any.

 *

 *****************************************************************************/

void __cdecl

AeCtrlCHandler (

    int                     Sig)

{

    signal (SIGINT, SIG_IGN);

    SigintCount++;

    AcpiOsPrintf ("Caught a ctrl-c (#%u)\n\n", SigintCount);

    if (AcpiGbl_MethodExecuting)

    {

        AcpiGbl_AbortMethod = TRUE;

        signal (SIGINT, AeCtrlCHandler);

        if (SigintCount < 10)

        {

            return;

        }

    }

    exit (0);

}

/******************************************************************************

 *

 * FUNCTION:    AeNotifyHandler

 *

 * PARAMETERS:  Standard notify handler parameters

 *

 * RETURN:      Status

 *

 * DESCRIPTION: System notify handler for AcpiExec utility.  Used by the ASL

 *              test suite(s) to communicate errors and other information to

 *              this utility via the Notify() operator.

 *

 *****************************************************************************/

void

AeNotifyHandler (

    ACPI_HANDLE                 Device,

    UINT32                      Value,

    void                        *Context)

{

    switch (Value)

    {

#if 0

    case 0:

        printf ("[AcpiExec] Method Error 0x%X: Results not equal\n", Value);

        if (AcpiGbl_DebugFile)

        {

            AcpiOsPrintf ("[AcpiExec] Method Error: Results not equal\n");

        }

        break;

    case 1:

        printf ("[AcpiExec] Method Error: Incorrect numeric result\n");

        if (AcpiGbl_DebugFile)

        {

            AcpiOsPrintf ("[AcpiExec] Method Error: Incorrect numeric result\n");

        }

        break;

    case 2:

        printf ("[AcpiExec] Method Error: An operand was overwritten\n");

        if (AcpiGbl_DebugFile)

        {

            AcpiOsPrintf ("[AcpiExec] Method Error: An operand was overwritten\n");

        }

        break;

#endif

    default:

        printf ("[AcpiExec] Received a System Notify on [%4.4s] %p Value 0x%2.2X (%s)\n",

            AcpiUtGetNodeName (Device), Device, Value,

            AcpiUtGetNotifyName (Value));

        if (AcpiGbl_DebugFile)

        {

            AcpiOsPrintf ("[AcpiExec] Received a system notify, Value 0x%2.2X\n", Value);

        }

        (void) AcpiEvaluateObject (Device, "_NOT", NULL, NULL);

        break;

    }

}

/******************************************************************************

 *

 * FUNCTION:    AeDeviceNotifyHandler

 *

 * PARAMETERS:  Standard notify handler parameters

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Device notify handler for AcpiExec utility.  Used by the ASL

 *              test suite(s) to communicate errors and other information to

 *              this utility via the Notify() operator.

 *

 *****************************************************************************/

void

AeDeviceNotifyHandler (

    ACPI_HANDLE                 Device,

    UINT32                      Value,

    void                        *Context)

{

    printf ("[AcpiExec] Received a Device Notify on [%4.4s] %p Value 0x%2.2X (%s)\n",

        AcpiUtGetNodeName (Device), Device, Value,

        AcpiUtGetNotifyName (Value));

    if (AcpiGbl_DebugFile)

    {

        AcpiOsPrintf ("[AcpiExec] Received a device notify, Value 0x%2.2X\n", Value);

    }

    (void) AcpiEvaluateObject (Device, "_NOT", NULL, NULL);

}

/******************************************************************************

 *

 * FUNCTION:    AeExceptionHandler

 *

 * PARAMETERS:  Standard exception handler parameters

 *

 * RETURN:      Status

 *

 * DESCRIPTION: System exception handler for AcpiExec utility.

 *

 *****************************************************************************/

ACPI_STATUS

AeExceptionHandler (

    ACPI_STATUS             AmlStatus,

    ACPI_NAME               Name,

    UINT16                  Opcode,

    UINT32                  AmlOffset,

    void                    *Context)

{

    ACPI_STATUS             NewAmlStatus = AmlStatus;

    ACPI_STATUS             Status;

    ACPI_BUFFER             ReturnObj;

    ACPI_OBJECT_LIST        ArgList;

    ACPI_OBJECT             Arg[3];

    const char              *Exception;

    Exception = AcpiFormatException (AmlStatus);

    AcpiOsPrintf ("[AcpiExec] Exception %s during execution ", Exception);

    if (Name)

    {

        AcpiOsPrintf ("of method [%4.4s]", (char *) &Name);

    }

    else

    {

        AcpiOsPrintf ("at module level (table load)");

    }

    AcpiOsPrintf (" Opcode [%s] @%X\n", AcpiPsGetOpcodeName (Opcode), AmlOffset);

    /*

     * Invoke the _ERR method if present

     *

     * Setup parameter object

     */

    ArgList.Count = 3;

    ArgList.Pointer = Arg;

    Arg[0].Type = ACPI_TYPE_INTEGER;

    Arg[0].Integer.Value = AmlStatus;

    Arg[1].Type = ACPI_TYPE_STRING;

    Arg[1].String.Pointer = ACPI_CAST_PTR (char, Exception);

    Arg[1].String.Length = ACPI_STRLEN (Exception);

    Arg[2].Type = ACPI_TYPE_INTEGER;

    Arg[2].Integer.Value = ACPI_TO_INTEGER (AcpiOsGetThreadId());

    /* Setup return buffer */

    ReturnObj.Pointer = NULL;

    ReturnObj.Length = ACPI_ALLOCATE_BUFFER;

    Status = AcpiEvaluateObject (NULL, "\\_ERR", &ArgList, &ReturnObj);

    if (ACPI_SUCCESS (Status))

    {

        if (ReturnObj.Pointer)

        {

            /* Override original status */

            NewAmlStatus = (ACPI_STATUS)

                ((ACPI_OBJECT *) ReturnObj.Pointer)->Integer.Value;

            AcpiOsFree (ReturnObj.Pointer);

        }

    }

    else if (Status != AE_NOT_FOUND)

    {

        AcpiOsPrintf ("[AcpiExec] Could not execute _ERR method, %s\n",

            AcpiFormatException (Status));

    }

    /* Global override */

    if (AcpiGbl_IgnoreErrors)

    {

        NewAmlStatus = AE_OK;

    }

    if (NewAmlStatus != AmlStatus)

    {

        AcpiOsPrintf ("[AcpiExec] Exception override, new status %s\n",

            AcpiFormatException (NewAmlStatus));

    }

    return (NewAmlStatus);

}

/******************************************************************************

 *

 * FUNCTION:    AeTableHandler

 *

 * PARAMETERS:  Table handler

 *

 * RETURN:      Status

 *

 * DESCRIPTION: System table handler for AcpiExec utility.

 *

 *****************************************************************************/

char                *TableEvents[] =

{

    "LOAD",

    "UNLOAD",

    "UNKNOWN"

};

ACPI_STATUS

AeTableHandler (

    UINT32                  Event,

    void                    *Table,

    void                    *Context)

{

    if (Event > ACPI_NUM_TABLE_EVENTS)

    {

        Event = ACPI_NUM_TABLE_EVENTS;

    }

    /* TBD: could dump entire table header, need a header dump routine */

    printf ("[AcpiExec] Table Event %s, [%4.4s] %p\n",

        TableEvents[Event], ((ACPI_TABLE_HEADER *) Table)->Signature, Table);

    return (AE_OK);

}

/******************************************************************************

 *

 * FUNCTION:    AeGpeHandler

 *

 * DESCRIPTION: GPE handler for acpiexec

 *

 *****************************************************************************/

UINT32

AeGpeHandler (

    void                    *Context)

{

    AcpiOsPrintf ("Received a GPE at handler\n");

    return (0);

}

/******************************************************************************

 *

 * FUNCTION:    AeAttachedDataHandler

 *

 * DESCRIPTION: Handler for deletion of nodes with attached data (attached via

 *              AcpiAttachData)

 *

 *****************************************************************************/

void

AeAttachedDataHandler (

    ACPI_HANDLE             Object,

    void                    *Data)

{

    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Data);

    AcpiOsPrintf ("Received an attached data deletion on %4.4s\n",

        Node->Name.Ascii);

}

/******************************************************************************

 *

 * FUNCTION:    AeRegionInit

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Opregion init function.

 *

 *****************************************************************************/

ACPI_STATUS

AeRegionInit (

    ACPI_HANDLE                 RegionHandle,

    UINT32                      Function,

    void                        *HandlerContext,

    void                        **RegionContext)

{

    /*

     * Real simple, set the RegionContext to the RegionHandle

     */

    *RegionContext = RegionHandle;

    return AE_OK;

}

/******************************************************************************

 *

 * FUNCTION:    AeInstallHandlers

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Install handlers for the AcpiExec utility.

 *

 *****************************************************************************/

ACPI_ADR_SPACE_TYPE         SpaceId[] = {0, 1, 2, 3, 4, 5, 6, 7, 0x80};

#define AEXEC_NUM_REGIONS   9

ACPI_STATUS

AeInstallHandlers (void)

{

    ACPI_STATUS             Status;

    UINT32                  i;

    ACPI_HANDLE             Handle;

    ACPI_FUNCTION_ENTRY ();

    Status = AcpiInstallTableHandler (AeTableHandler, NULL);

    if (ACPI_FAILURE (Status))

    {

        printf ("Could not install table handler, %s\n",

            AcpiFormatException (Status));

    }

    Status = AcpiInstallExceptionHandler (AeExceptionHandler);

    if (ACPI_FAILURE (Status))

    {

        printf ("Could not install exception handler, %s\n",

            AcpiFormatException (Status));

    }

    /* Install global notify handler */

    Status = AcpiInstallNotifyHandler (ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,

                                        AeNotifyHandler, NULL);

    if (ACPI_FAILURE (Status))

    {

        printf ("Could not install a global notify handler, %s\n",

            AcpiFormatException (Status));

    }

    Status = AcpiInstallNotifyHandler (ACPI_ROOT_OBJECT, ACPI_DEVICE_NOTIFY,

                                        AeDeviceNotifyHandler, NULL);

    if (ACPI_FAILURE (Status))

    {

        printf ("Could not install a global notify handler, %s\n",

            AcpiFormatException (Status));

    }

    Status = AcpiGetHandle (NULL, "\\_SB", &Handle);

    if (ACPI_SUCCESS (Status))

    {

        Status = AcpiInstallNotifyHandler (Handle, ACPI_SYSTEM_NOTIFY,

                                            AeNotifyHandler, NULL);

        if (ACPI_FAILURE (Status))

        {

            printf ("Could not install a notify handler, %s\n",

                AcpiFormatException (Status));

        }

        Status = AcpiRemoveNotifyHandler (Handle, ACPI_SYSTEM_NOTIFY,

                                            AeNotifyHandler);

        if (ACPI_FAILURE (Status))

        {

            printf ("Could not remove a notify handler, %s\n",

                AcpiFormatException (Status));

        }

        Status = AcpiInstallNotifyHandler (Handle, ACPI_ALL_NOTIFY,

                                            AeNotifyHandler, NULL);

        Status = AcpiRemoveNotifyHandler (Handle, ACPI_ALL_NOTIFY,

                                            AeNotifyHandler);

        Status = AcpiInstallNotifyHandler (Handle, ACPI_ALL_NOTIFY,

                                            AeNotifyHandler, NULL);

        if (ACPI_FAILURE (Status))

        {

            printf ("Could not install a notify handler, %s\n",

                AcpiFormatException (Status));

        }

        Status = AcpiAttachData (Handle, AeAttachedDataHandler, Handle);

        Status = AcpiDetachData (Handle, AeAttachedDataHandler);

        Status = AcpiAttachData (Handle, AeAttachedDataHandler, Handle);

    }

    else

    {

        printf ("No _SB_ found, %s\n", AcpiFormatException (Status));

    }

    /* Set a handler for all supported operation regions */

    for (i = 0; i < AEXEC_NUM_REGIONS; i++)

    {

        Status = AcpiRemoveAddressSpaceHandler (AcpiGbl_RootNode,

                        SpaceId[i], AeRegionHandler);

        /* Install handler at the root object.

         * TBD: all default handlers should be installed here!

         */

        Status = AcpiInstallAddressSpaceHandler (AcpiGbl_RootNode,

                        SpaceId[i], AeRegionHandler, AeRegionInit, NULL);

        if (ACPI_FAILURE (Status))

        {

            ACPI_EXCEPTION ((AE_INFO, Status,

                "Could not install an OpRegion handler for %s space(%u)",

                AcpiUtGetRegionName((UINT8) SpaceId[i]), SpaceId[i]));

            return (Status);

        }

    }

    /*

     * Initialize the global Region Handler space

     * MCW 3/23/00

     */

    AeRegions.NumberOfRegions = 0;

    AeRegions.RegionList = NULL;

    return Status;

}

/******************************************************************************

 *

 * FUNCTION:    AeRegionHandler

 *

 * PARAMETERS:  Standard region handler parameters

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Test handler - Handles some dummy regions via memory that can

 *              be manipulated in Ring 3. Simulates actual reads and writes.

 *

 *****************************************************************************/

ACPI_STATUS

AeRegionHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_OPERAND_OBJECT     *RegionObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, RegionContext);

    UINT8                   *Buffer = ACPI_CAST_PTR (UINT8, Value);

    ACPI_PHYSICAL_ADDRESS   BaseAddress;

    ACPI_SIZE               Length;

    BOOLEAN                 BufferExists;

    AE_REGION               *RegionElement;

    void                    *BufferValue;

    ACPI_STATUS             Status;

    UINT32                  ByteWidth;

    UINT32                  i;

    UINT8                   SpaceId;

    ACPI_FUNCTION_NAME (AeRegionHandler);

    /*

     * If the object is not a region, simply return

     */

    if (RegionObject->Region.Type != ACPI_TYPE_REGION)

    {

        return AE_OK;

    }

    /*

     * Region support can be disabled with the -r option.

     * We use this to support dynamically loaded tables where we pass a valid

     * address to the AML.

     */

    if (AcpiGbl_DbOpt_NoRegionSupport)

    {

        BufferValue = ACPI_TO_POINTER (Address);

        ByteWidth = (BitWidth / 8);

        if (BitWidth % 8)

        {

            ByteWidth += 1;

        }

        goto DoFunction;

    }

    /*

     * Find the region's address space and length before searching

     * the linked list.

     */

    BaseAddress = RegionObject->Region.Address;

    Length = (ACPI_SIZE) RegionObject->Region.Length;

    SpaceId = RegionObject->Region.SpaceId;

    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Operation Region request on %s at 0x%X\n",

            AcpiUtGetRegionName (RegionObject->Region.SpaceId),

            (UINT32) Address));

    switch (SpaceId)

    {

    case ACPI_ADR_SPACE_SYSTEM_IO:

        /*

         * For I/O space, exercise the port validation

         */

        switch (Function & ACPI_IO_MASK)

        {

        case ACPI_READ:

            Status = AcpiHwReadPort (Address, (UINT32 *) Value, BitWidth);

            break;

        case ACPI_WRITE:

            Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth);

            break;

        default:

            Status = AE_BAD_PARAMETER;

            break;

        }

        if (ACPI_FAILURE (Status))

        {

            return (Status);

        }

        /* Now go ahead and simulate the hardware */

        break;

    case ACPI_ADR_SPACE_SMBUS:

        Length = 0;

        switch (Function & ACPI_IO_MASK)

        {

        case ACPI_READ:

            switch (Function >> 16)

            {

            case AML_FIELD_ATTRIB_SMB_QUICK:

            case AML_FIELD_ATTRIB_SMB_SEND_RCV:

            case AML_FIELD_ATTRIB_SMB_BYTE:

                Length = 1;

                break;

            case AML_FIELD_ATTRIB_SMB_WORD:

            case AML_FIELD_ATTRIB_SMB_WORD_CALL:

                Length = 2;

                break;

            case AML_FIELD_ATTRIB_SMB_BLOCK:

            case AML_FIELD_ATTRIB_SMB_BLOCK_CALL:

                Length = 32;

                break;

            default:

                break;

            }

            break;

        case ACPI_WRITE:

            switch (Function >> 16)

            {

            case AML_FIELD_ATTRIB_SMB_QUICK:

            case AML_FIELD_ATTRIB_SMB_SEND_RCV:

            case AML_FIELD_ATTRIB_SMB_BYTE:

            case AML_FIELD_ATTRIB_SMB_WORD:

            case AML_FIELD_ATTRIB_SMB_BLOCK:

                Length = 0;

                break;

            case AML_FIELD_ATTRIB_SMB_WORD_CALL:

                Length = 2;

                break;

            case AML_FIELD_ATTRIB_SMB_BLOCK_CALL:

                Length = 32;

                break;

            default:

                break;

            }

            break;

        default:

            break;

        }

        for (i = 0; i < Length; i++)

        {

            Buffer[i+2] = (UINT8) (0xA0 + i);

        }

        Buffer[0] = 0x7A;

        Buffer[1] = (UINT8) Length;

        return (AE_OK);

    case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */

        AcpiOsPrintf ("AcpiExec: Received IPMI request: "

            "Address %X BaseAddress %X Length %X Width %X BufferLength %u\n",

            (UINT32) Address, (UINT32) BaseAddress,

            Length, BitWidth, Buffer[1]);

        /*

         * Regardless of a READ or WRITE, this handler is passed a 66-byte

         * buffer in which to return the IPMI status/length/data.

         *

         * Return some example data to show use of the bidirectional buffer

         */

        Buffer[0] = 0;       /* Status byte */

        Buffer[1] = 64;      /* Return buffer data length */

        Buffer[2] = 0;       /* Completion code */

        Buffer[3] = 0x34;    /* Power measurement */

        Buffer[4] = 0x12;    /* Power measurement */

        Buffer[65] = 0xEE;   /* last buffer byte */

        return (AE_OK);

    default:

        break;

    }

    /*

     * Search through the linked list for this region's buffer

     */

    BufferExists = FALSE;

    RegionElement = AeRegions.RegionList;

    if (AeRegions.NumberOfRegions)

    {

        while (!BufferExists && RegionElement)

        {

            if (RegionElement->Address == BaseAddress &&

                RegionElement->Length == Length &&

                RegionElement->SpaceId == SpaceId)

            {

                BufferExists = TRUE;

            }

            else

            {

                RegionElement = RegionElement->NextRegion;

            }

        }

    }

    /*

     * If the Region buffer does not exist, create it now

     */

    if (!BufferExists)

    {

        /*

         * Do the memory allocations first

         */

        RegionElement = AcpiOsAllocate (sizeof (AE_REGION));

        if (!RegionElement)

        {

            return AE_NO_MEMORY;

        }

        RegionElement->Buffer = AcpiOsAllocate (Length);

        if (!RegionElement->Buffer)

        {

            AcpiOsFree (RegionElement);

            return AE_NO_MEMORY;

        }

        /* Initialize the region with the default fill value */

        ACPI_MEMSET (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length);

        RegionElement->Address      = BaseAddress;

        RegionElement->Length       = Length;

        RegionElement->SpaceId      = SpaceId;

        RegionElement->NextRegion   = NULL;

        /*

         * Increment the number of regions and put this one

         *  at the head of the list as it will probably get accessed

         *  more often anyway.

         */

        AeRegions.NumberOfRegions += 1;

        if (AeRegions.RegionList)

        {

            RegionElement->NextRegion = AeRegions.RegionList;

        }

        AeRegions.RegionList = RegionElement;

    }

    /*

     * Calculate the size of the memory copy

     */

    ByteWidth = (BitWidth / 8);

    if (BitWidth % 8)

    {

        ByteWidth += 1;

    }

    /*

     * The buffer exists and is pointed to by RegionElement.

     * We now need to verify the request is valid and perform the operation.

     *

     * NOTE: RegionElement->Length is in bytes, therefore it we compare against

     * ByteWidth (see above)

     */

    if (((UINT64) Address + ByteWidth) >

        ((UINT64)(RegionElement->Address) + RegionElement->Length))

    {

        ACPI_WARNING ((AE_INFO,

            "Request on [%4.4s] is beyond region limit Req-0x%X+0x%X, Base=0x%X, Len-0x%X",

            (RegionObject->Region.Node)->Name.Ascii, (UINT32) Address,

            ByteWidth, (UINT32)(RegionElement->Address),

            RegionElement->Length));

        return AE_AML_REGION_LIMIT;

    }

    /*

     * Get BufferValue to point to the "address" in the buffer

     */

    BufferValue = ((UINT8 *) RegionElement->Buffer +

                    ((UINT64) Address - (UINT64) RegionElement->Address));

DoFunction:

    /*

     * Perform a read or write to the buffer space

     */

    switch (Function)

    {

    case ACPI_READ:

        /*

         * Set the pointer Value to whatever is in the buffer

         */

        ACPI_MEMCPY (Value, BufferValue, ByteWidth);

        break;

    case ACPI_WRITE:

        /*

         * Write the contents of Value to the buffer

         */

        ACPI_MEMCPY (BufferValue, Value, ByteWidth);

        break;

    default:

        return AE_BAD_PARAMETER;

    }

    return AE_OK;

}