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

 *

 * Module Name: oswinxf - Windows OSL

 *

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

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

 *

 * 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.

 *

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

#ifdef WIN32

#pragma warning(disable:4115)   /* warning C4115: named type definition in parentheses (caused by rpcasync.h> */

#include 

#include 

#elif WIN64

#include 

#endif

#include 

#include 

#include 

#include 

#include 

#include "acpi.h"

#include "accommon.h"

#define _COMPONENT          ACPI_OS_SERVICES

        ACPI_MODULE_NAME    ("oswinxf")

/* Semaphore information structure */

typedef struct acpi_os_semaphore_info

{

    UINT16                  MaxUnits;

    UINT16                  CurrentUnits;

    void                    *OsHandle;

} ACPI_OS_SEMAPHORE_INFO;

/* Need enough semaphores to run the large aslts suite */

#define ACPI_OS_MAX_SEMAPHORES  256

ACPI_OS_SEMAPHORE_INFO          AcpiGbl_Semaphores[ACPI_OS_MAX_SEMAPHORES];

/* Upcalls to AcpiExec */

ACPI_PHYSICAL_ADDRESS

AeLocalGetRootPointer (

    void);

void

AeTableOverride (

    ACPI_TABLE_HEADER       *ExistingTable,

    ACPI_TABLE_HEADER       **NewTable);

ACPI_TABLE_HEADER *

OsGetTable (

    char                    *Signature);

extern FILE                 *AcpiGbl_DebugFile;

extern BOOLEAN              AcpiGbl_DebugTimeout;

FILE                        *AcpiGbl_OutputFile;

UINT64                      TimerFrequency;

char                        TableName[ACPI_NAME_SIZE + 1];

#define ACPI_OS_DEBUG_TIMEOUT   30000 /* 30 seconds */

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

 *

 * FUNCTION:    AcpiOsTerminate

 *

 * PARAMETERS:  None

 *

 * RETURN:      None

 *

 * DESCRIPTION: Nothing to do for windows

 *

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

ACPI_STATUS

AcpiOsTerminate (void)

{

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsInitialize

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Init this OSL

 *

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

ACPI_STATUS

AcpiOsInitialize (void)

{

    LARGE_INTEGER           LocalTimerFrequency;

    AcpiGbl_OutputFile = stdout;

    /* Clear the semaphore info array */

    memset (AcpiGbl_Semaphores, 0x00, sizeof (AcpiGbl_Semaphores));

    /* Get the timer frequency for use in AcpiOsGetTimer */

    TimerFrequency = 0;

    if (QueryPerformanceFrequency (&LocalTimerFrequency))

    {

        /* Frequency is in ticks per second */

        TimerFrequency = LocalTimerFrequency.QuadPart;

    }

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsGetRootPointer

 *

 * PARAMETERS:  None

 *

 * RETURN:      RSDP physical address

 *

 * DESCRIPTION: Gets the root pointer (RSDP)

 *

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

ACPI_PHYSICAL_ADDRESS

AcpiOsGetRootPointer (

    void)

{

    return (AeLocalGetRootPointer ());

}

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

 *

 * FUNCTION:    AcpiOsPredefinedOverride

 *

 * PARAMETERS:  InitVal     - Initial value of the predefined object

 *              NewVal      - The new value for the object

 *

 * RETURN:      Status, pointer to value.  Null pointer returned if not

 *              overriding.

 *

 * DESCRIPTION: Allow the OS to override predefined names

 *

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

ACPI_STATUS

AcpiOsPredefinedOverride (

    const ACPI_PREDEFINED_NAMES *InitVal,

    ACPI_STRING                 *NewVal)

{

    if (!InitVal || !NewVal)

    {

        return (AE_BAD_PARAMETER);

    }

    *NewVal = NULL;

    return (AE_OK);

}

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

 *

 * FUNCTION:    AcpiOsTableOverride

 *

 * PARAMETERS:  ExistingTable   - Header of current table (probably firmware)

 *              NewTable        - Where an entire new table is returned.

 *

 * RETURN:      Status, pointer to new table.  Null pointer returned if no

 *              table is available to override

 *

 * DESCRIPTION: Return a different version of a table if one is available

 *

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

ACPI_STATUS

AcpiOsTableOverride (

    ACPI_TABLE_HEADER       *ExistingTable,

    ACPI_TABLE_HEADER       **NewTable)

{

    if (!ExistingTable || !NewTable)

    {

        return (AE_BAD_PARAMETER);

    }

    *NewTable = NULL;

#ifdef ACPI_EXEC_APP

    /* Call back up to AcpiExec */

    AeTableOverride (ExistingTable, NewTable);

#endif

#ifdef ACPI_ASL_COMPILER

    /* Attempt to get the table from the registry */

    /* Construct a null-terminated string from table signature */

    TableName[ACPI_NAME_SIZE] = 0;

    ACPI_STRNCPY (TableName, ExistingTable->Signature, ACPI_NAME_SIZE);

    *NewTable = OsGetTable (TableName);

    if (*NewTable)

    {

        AcpiOsPrintf ("Table [%s] obtained from registry, %u bytes\n",

            TableName, (*NewTable)->Length);

    }

    else

    {

        AcpiOsPrintf ("Could not read table %s from registry\n", TableName);

    }

#endif

    return (AE_OK);

}

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

 *

 * FUNCTION:    AcpiOsGetTimer

 *

 * PARAMETERS:  None

 *

 * RETURN:      Current ticks in 100-nanosecond units

 *

 * DESCRIPTION: Get the value of a system timer

 *

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

UINT64

AcpiOsGetTimer (

    void)

{

    LARGE_INTEGER           Timer;

    /* Attempt to use hi-granularity timer first */

    if (TimerFrequency &&

        QueryPerformanceCounter (&Timer))

    {

        /* Convert to 100 nanosecond ticks */

        return ((UINT64) ((Timer.QuadPart * (UINT64) 10000000) / TimerFrequency));

    }

    /* Fall back to the lo-granularity timer */

    else

    {

        /* Convert milliseconds to 100 nanosecond ticks */

        return ((UINT64) GetTickCount() * 10000);

    }

}

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

 *

 * FUNCTION:    AcpiOsReadable

 *

 * PARAMETERS:  Pointer             - Area to be verified

 *              Length              - Size of area

 *

 * RETURN:      TRUE if readable for entire length

 *

 * DESCRIPTION: Verify that a pointer is valid for reading

 *

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

BOOLEAN

AcpiOsReadable (

    void                    *Pointer,

    ACPI_SIZE               Length)

{

    return ((BOOLEAN) !IsBadReadPtr (Pointer, Length));

}

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

 *

 * FUNCTION:    AcpiOsWritable

 *

 * PARAMETERS:  Pointer             - Area to be verified

 *              Length              - Size of area

 *

 * RETURN:      TRUE if writable for entire length

 *

 * DESCRIPTION: Verify that a pointer is valid for writing

 *

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

BOOLEAN

AcpiOsWritable (

    void                    *Pointer,

    ACPI_SIZE               Length)

{

    return ((BOOLEAN) !IsBadWritePtr (Pointer, Length));

}

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

 *

 * FUNCTION:    AcpiOsRedirectOutput

 *

 * PARAMETERS:  Destination         - An open file handle/pointer

 *

 * RETURN:      None

 *

 * DESCRIPTION: Causes redirect of AcpiOsPrintf and AcpiOsVprintf

 *

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

void

AcpiOsRedirectOutput (

    void                    *Destination)

{

    AcpiGbl_OutputFile = Destination;

}

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

 *

 * FUNCTION:    AcpiOsPrintf

 *

 * PARAMETERS:  fmt, ...            Standard printf format

 *

 * RETURN:      None

 *

 * DESCRIPTION: Formatted output

 *

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

void ACPI_INTERNAL_VAR_XFACE

AcpiOsPrintf (

    const char              *Fmt,

    ...)

{

    va_list                 Args;

    va_start (Args, Fmt);

    AcpiOsVprintf (Fmt, Args);

    va_end (Args);

    return;

}

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

 *

 * FUNCTION:    AcpiOsVprintf

 *

 * PARAMETERS:  fmt                 Standard printf format

 *              args                Argument list

 *

 * RETURN:      None

 *

 * DESCRIPTION: Formatted output with argument list pointer

 *

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

void

AcpiOsVprintf (

    const char              *Fmt,

    va_list                 Args)

{

    INT32                   Count = 0;

    UINT8                   Flags;

    Flags = AcpiGbl_DbOutputFlags;

    if (Flags & ACPI_DB_REDIRECTABLE_OUTPUT)

    {

        /* Output is directable to either a file (if open) or the console */

        if (AcpiGbl_DebugFile)

        {

            /* Output file is open, send the output there */

            Count = vfprintf (AcpiGbl_DebugFile, Fmt, Args);

        }

        else

        {

            /* No redirection, send output to console (once only!) */

            Flags |= ACPI_DB_CONSOLE_OUTPUT;

        }

    }

    if (Flags & ACPI_DB_CONSOLE_OUTPUT)

    {

        Count = vfprintf (AcpiGbl_OutputFile, Fmt, Args);

    }

    return;

}

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

 *

 * FUNCTION:    AcpiOsGetLine

 *

 * PARAMETERS:  fmt                 Standard printf format

 *              args                Argument list

 *

 * RETURN:      Actual bytes read

 *

 * DESCRIPTION: Formatted input with argument list pointer

 *

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

UINT32

AcpiOsGetLine (

    char                    *Buffer)

{

    char                    Temp;

    UINT32                  i;

    for (i = 0; ; i++)

    {

        scanf ("%1c", &Temp);

        if (!Temp || Temp == '\n')

        {

            break;

        }

        Buffer [i] = Temp;

    }

    /* Null terminate the buffer */

    Buffer [i] = 0;

    /* Return the number of bytes in the string */

    return (i);

}

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

 *

 * FUNCTION:    AcpiOsMapMemory

 *

 * PARAMETERS:  where               Physical address of memory to be mapped

 *              length              How much memory to map

 *

 * RETURN:      Pointer to mapped memory.  Null on error.

 *

 * DESCRIPTION: Map physical memory into caller's address space

 *

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

void *

AcpiOsMapMemory (

    ACPI_PHYSICAL_ADDRESS   where,

    ACPI_SIZE               length)

{

    return (ACPI_TO_POINTER ((ACPI_SIZE) where));

}

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

 *

 * FUNCTION:    AcpiOsUnmapMemory

 *

 * PARAMETERS:  where               Logical address of memory to be unmapped

 *              length              How much memory to unmap

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Delete a previously created mapping.  Where and Length must

 *              correspond to a previous mapping exactly.

 *

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

void

AcpiOsUnmapMemory (

    void                    *where,

    ACPI_SIZE               length)

{

    return;

}

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

 *

 * FUNCTION:    AcpiOsAllocate

 *

 * PARAMETERS:  Size                Amount to allocate, in bytes

 *

 * RETURN:      Pointer to the new allocation.  Null on error.

 *

 * DESCRIPTION: Allocate memory.  Algorithm is dependent on the OS.

 *

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

void *

AcpiOsAllocate (

    ACPI_SIZE               size)

{

    void                    *Mem;

    Mem = (void *) malloc ((size_t) size);

    return Mem;

}

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

 *

 * FUNCTION:    AcpiOsFree

 *

 * PARAMETERS:  mem                 Pointer to previously allocated memory

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Free memory allocated via AcpiOsAllocate

 *

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

void

AcpiOsFree (

    void                    *Mem)

{

    free (Mem);

}

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

 *

 * FUNCTION:    AcpiOsCreateSemaphore

 *

 * PARAMETERS:  MaxUnits            - Maximum units that can be sent

 *              InitialUnits        - Units to be assigned to the new semaphore

 *              OutHandle           - Where a handle will be returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create an OS semaphore

 *

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

ACPI_STATUS

AcpiOsCreateSemaphore (

    UINT32              MaxUnits,

    UINT32              InitialUnits,

    ACPI_SEMAPHORE      *OutHandle)

{

#ifdef _MULTI_THREADED

    void                *Mutex;

    UINT32              i;

    ACPI_FUNCTION_NAME (OsCreateSemaphore);

#endif

    if (MaxUnits == ACPI_UINT32_MAX)

    {

        MaxUnits = 255;

    }

    if (InitialUnits == ACPI_UINT32_MAX)

    {

        InitialUnits = MaxUnits;

    }

    if (InitialUnits > MaxUnits)

    {

        return AE_BAD_PARAMETER;

    }

#ifdef _MULTI_THREADED

    /* Find an empty slot */

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

    {

        if (!AcpiGbl_Semaphores[i].OsHandle)

        {

            break;

        }

    }

    if (i >= ACPI_OS_MAX_SEMAPHORES)

    {

        ACPI_EXCEPTION ((AE_INFO, AE_LIMIT,

            "Reached max semaphores (%u), could not create", ACPI_OS_MAX_SEMAPHORES));

        return AE_LIMIT;

    }

    /* Create an OS semaphore */

    Mutex = CreateSemaphore (NULL, InitialUnits, MaxUnits, NULL);

    if (!Mutex)

    {

        ACPI_ERROR ((AE_INFO, "Could not create semaphore"));

        return AE_NO_MEMORY;

    }

    AcpiGbl_Semaphores[i].MaxUnits = (UINT16) MaxUnits;

    AcpiGbl_Semaphores[i].CurrentUnits = (UINT16) InitialUnits;

    AcpiGbl_Semaphores[i].OsHandle = Mutex;

    ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Handle=%u, Max=%u, Current=%u, OsHandle=%p\n",

            i, MaxUnits, InitialUnits, Mutex));

    *OutHandle = (void *) i;

#endif

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsDeleteSemaphore

 *

 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Delete an OS semaphore

 *

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

ACPI_STATUS

AcpiOsDeleteSemaphore (

    ACPI_SEMAPHORE      Handle)

{

    UINT32              Index = (UINT32) Handle;

    if ((Index >= ACPI_OS_MAX_SEMAPHORES) ||

        !AcpiGbl_Semaphores[Index].OsHandle)

    {

        return AE_BAD_PARAMETER;

    }

#ifdef _MULTI_THREADED

    CloseHandle (AcpiGbl_Semaphores[Index].OsHandle);

    AcpiGbl_Semaphores[Index].OsHandle = NULL;

#endif

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsWaitSemaphore

 *

 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore

 *              Units               - How many units to wait for

 *              Timeout             - How long to wait

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Wait for units

 *

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

ACPI_STATUS

AcpiOsWaitSemaphore (

    ACPI_SEMAPHORE      Handle,

    UINT32              Units,

    UINT16              Timeout)

{

#ifdef _MULTI_THREADED

    UINT32              Index = (UINT32) Handle;

    UINT32              WaitStatus;

    UINT32              OsTimeout = Timeout;

    ACPI_FUNCTION_ENTRY ();

    if ((Index >= ACPI_OS_MAX_SEMAPHORES) ||

        !AcpiGbl_Semaphores[Index].OsHandle)

    {

        return AE_BAD_PARAMETER;

    }

    if (Units > 1)

    {

        printf ("WaitSemaphore: Attempt to receive %u units\n", Units);

        return AE_NOT_IMPLEMENTED;

    }

    if (Timeout == ACPI_WAIT_FOREVER)

    {

        OsTimeout = INFINITE;

        if (AcpiGbl_DebugTimeout)

        {

            /* The debug timeout will prevent hang conditions */

            OsTimeout = ACPI_OS_DEBUG_TIMEOUT;

        }

    }

    else

    {

        /* Add 10ms to account for clock tick granularity */

        OsTimeout += 10;

    }

    WaitStatus = WaitForSingleObject (AcpiGbl_Semaphores[Index].OsHandle, OsTimeout);

    if (WaitStatus == WAIT_TIMEOUT)

    {

        if (AcpiGbl_DebugTimeout)

        {

            ACPI_EXCEPTION ((AE_INFO, AE_TIME,

                "Debug timeout on semaphore 0x%04X (%ums)\n",

                Index, ACPI_OS_DEBUG_TIMEOUT));

        }

        return AE_TIME;

    }

    if (AcpiGbl_Semaphores[Index].CurrentUnits == 0)

    {

        ACPI_ERROR ((AE_INFO, "%s - No unit received. Timeout 0x%X, OS_Status 0x%X",

            AcpiUtGetMutexName (Index), Timeout, WaitStatus));

        return AE_OK;

    }

    AcpiGbl_Semaphores[Index].CurrentUnits--;

#endif

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsSignalSemaphore

 *

 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore

 *              Units               - Number of units to send

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Send units

 *

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

ACPI_STATUS

AcpiOsSignalSemaphore (

    ACPI_SEMAPHORE      Handle,

    UINT32              Units)

{

#ifdef _MULTI_THREADED

    UINT32              Index = (UINT32) Handle;

    ACPI_FUNCTION_ENTRY ();

    if (Index >= ACPI_OS_MAX_SEMAPHORES)

    {

        printf ("SignalSemaphore: Index/Handle out of range: %2.2X\n", Index);

        return AE_BAD_PARAMETER;

    }

    if (!AcpiGbl_Semaphores[Index].OsHandle)

    {

        printf ("SignalSemaphore: Null OS handle, Index %2.2X\n", Index);

        return AE_BAD_PARAMETER;

    }

    if (Units > 1)

    {

        printf ("SignalSemaphore: Attempt to signal %u units, Index %2.2X\n", Units, Index);

        return AE_NOT_IMPLEMENTED;

    }

    if ((AcpiGbl_Semaphores[Index].CurrentUnits + 1) >

        AcpiGbl_Semaphores[Index].MaxUnits)

    {

        ACPI_ERROR ((AE_INFO,

            "Oversignalled semaphore[%u]! Current %u Max %u",

            Index, AcpiGbl_Semaphores[Index].CurrentUnits,

            AcpiGbl_Semaphores[Index].MaxUnits));

        return (AE_LIMIT);

    }

    AcpiGbl_Semaphores[Index].CurrentUnits++;

    ReleaseSemaphore (AcpiGbl_Semaphores[Index].OsHandle, Units, NULL);

#endif

    return (AE_OK);

}

/* Spinlock interfaces, just implement with a semaphore */

ACPI_STATUS

AcpiOsCreateLock (

    ACPI_SPINLOCK           *OutHandle)

{

    return (AcpiOsCreateSemaphore (1, 1, OutHandle));

}

void

AcpiOsDeleteLock (

    ACPI_SPINLOCK           Handle)

{

    AcpiOsDeleteSemaphore (Handle);

}

ACPI_CPU_FLAGS

AcpiOsAcquireLock (

    ACPI_SPINLOCK           Handle)

{

    AcpiOsWaitSemaphore (Handle, 1, 0xFFFF);

    return (0);

}

void

AcpiOsReleaseLock (

    ACPI_SPINLOCK           Handle,

    ACPI_CPU_FLAGS          Flags)

{

    AcpiOsSignalSemaphore (Handle, 1);

}

#if ACPI_FUTURE_IMPLEMENTATION

/* Mutex interfaces, just implement with a semaphore */

ACPI_STATUS

AcpiOsCreateMutex (

    ACPI_MUTEX              *OutHandle)

{

    return (AcpiOsCreateSemaphore (1, 1, OutHandle));

}

void

AcpiOsDeleteMutex (

    ACPI_MUTEX              Handle)

{

    AcpiOsDeleteSemaphore (Handle);

}

ACPI_STATUS

AcpiOsAcquireMutex (

    ACPI_MUTEX              Handle,

    UINT16                  Timeout)

{

    AcpiOsWaitSemaphore (Handle, 1, Timeout);

    return (0);

}

void

AcpiOsReleaseMutex (

    ACPI_MUTEX              Handle)

{

    AcpiOsSignalSemaphore (Handle, 1);

}

#endif

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

 *

 * FUNCTION:    AcpiOsInstallInterruptHandler

 *

 * PARAMETERS:  InterruptNumber     Level handler should respond to.

 *              Isr                 Address of the ACPI interrupt handler

 *              ExceptPtr           Where status is returned

 *

 * RETURN:      Handle to the newly installed handler.

 *

 * DESCRIPTION: Install an interrupt handler.  Used to install the ACPI

 *              OS-independent handler.

 *

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

UINT32

AcpiOsInstallInterruptHandler (

    UINT32                  InterruptNumber,

    ACPI_OSD_HANDLER        ServiceRoutine,

    void                    *Context)

{

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsRemoveInterruptHandler

 *

 * PARAMETERS:  Handle              Returned when handler was installed

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Uninstalls an interrupt handler.

 *

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

ACPI_STATUS

AcpiOsRemoveInterruptHandler (

    UINT32                  InterruptNumber,

    ACPI_OSD_HANDLER        ServiceRoutine)

{

    return AE_OK;

}

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

 *

 * FUNCTION:    AcpiOsGetThreadId

 *

 * PARAMETERS:  None

 *

 * RETURN:      Id of the running thread

 *

 * DESCRIPTION: Get the Id of the current (running) thread

 *

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

ACPI_THREAD_ID

AcpiOsGetThreadId (

    void)

{

    DWORD                   ThreadId;

    /* Ensure ID is never 0 */

    ThreadId = GetCurrentThreadId ();

    return (ThreadId + 1);

}

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

 *

 * FUNCTION:    AcpiOsExecute

 *

 * PARAMETERS:  Type            - Type of execution

 *              Function        - Address of the function to execute

 *              Context         - Passed as a parameter to the function

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Execute a new thread

 *

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

ACPI_STATUS

AcpiOsExecute (

    ACPI_EXECUTE_TYPE       Type,

    ACPI_OSD_EXEC_CALLBACK  Function,

    void                    *Context)

{

#ifdef _MULTI_THREADED

    _beginthread (Function, (unsigned) 0, Context);

#endif

    return 0;

}

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

 *

 * FUNCTION:    AcpiOsStall

 *

 * PARAMETERS:  microseconds        To sleep

 *

 * RETURN:      Blocks until sleep is completed.

 *

 * DESCRIPTION: Sleep at microsecond granularity

 *

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

void

AcpiOsStall (

    UINT32                  microseconds)

{