void
AcpiDbAddToHistory (
    char                    *CommandLine)
{
    UINT16                  CmdLen;
    UINT16                  BufferLen;

    /* Put command into the next available slot */

    CmdLen = (UINT16) ACPI_STRLEN (CommandLine);
    if (AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command != NULL)
    {
        BufferLen = (UINT16) ACPI_STRLEN (
            AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command);
        if (CmdLen > BufferLen)
        {
            AcpiOsFree (AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].
                Command);
            AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command =
                AcpiOsAllocate (CmdLen + 1);
        }
    }
    else
    {
        AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command =
            AcpiOsAllocate (CmdLen + 1);
    }

    ACPI_STRCPY (AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command,
        CommandLine);

    AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].CmdNum =
        AcpiGbl_NextCmdNum;

    /* Adjust indexes */

    if ((AcpiGbl_NumHistory == HISTORY_SIZE) &&
        (AcpiGbl_NextHistoryIndex == AcpiGbl_LoHistory))
    {
        AcpiGbl_LoHistory++;
        if (AcpiGbl_LoHistory >= HISTORY_SIZE)
        {
            AcpiGbl_LoHistory = 0;
        }
    }

    AcpiGbl_NextHistoryIndex++;
    if (AcpiGbl_NextHistoryIndex >= HISTORY_SIZE)
    {
        AcpiGbl_NextHistoryIndex = 0;
    }

    AcpiGbl_NextCmdNum++;
    if (AcpiGbl_NumHistory < HISTORY_SIZE)
    {
        AcpiGbl_NumHistory++;
    }
}

ACPI_STATUS
AcpiOsCreateCache (
    const char              *CacheName,
    UINT16                  ObjectSize,
    UINT16                  MaxDepth,
    ACPI_MEMORY_LIST        **ReturnCache)
{
    ACPI_MEMORY_LIST        *Cache;


    ACPI_FUNCTION_ENTRY ();


    if (!CacheName || !ReturnCache || (ObjectSize < 16))
    {
        return (AE_BAD_PARAMETER);
    }

    /* Create the cache object */

    Cache = AcpiOsAllocate (sizeof (ACPI_MEMORY_LIST));
    if (!Cache)
    {
        return (AE_NO_MEMORY);
    }

    /* Populate the cache object and return it */
    memset (Cache, 0, sizeof (ACPI_MEMORY_LIST));
    Cache->ListName   = __UNCONST(CacheName);
    Cache->ObjectSize = ObjectSize;
    Cache->MaxDepth = MaxDepth;

    *ReturnCache = Cache;
    return (AE_OK);
}

void *
AcpiUtAllocate (
    ACPI_SIZE               Size,
    UINT32                  Component,
    const char              *Module,
    UINT32                  Line)
{
    void                    *Allocation;


    ACPI_FUNCTION_TRACE_U32 (UtAllocate, Size);


    /* Check for an inadvertent size of zero bytes */

    if (!Size)
    {
        ACPI_WARNING ((Module, Line,
                       "Attempt to allocate zero bytes, allocating 1 byte"));
        Size = 1;
    }

    Allocation = AcpiOsAllocate (Size);
    if (!Allocation)
    {
        /* Report allocation error */

        ACPI_WARNING ((Module, Line,
                       "Could not allocate size %u", (UINT32) Size));

        return_PTR (NULL);
    }

    return_PTR (Allocation);
}

static void
acpi_res_set_init(device_t dev, void *arg, void **context)
{
    struct acpi_res_context	*cp;

    if ((cp = AcpiOsAllocate(sizeof(*cp))) != NULL) {
	bzero(cp, sizeof(*cp));
	cp->ar_parent = arg;
	*context = cp;
    }
}

void *
AcpiUtAllocateAndTrack (
    ACPI_SIZE               Size,
    UINT32                  Component,
    const char              *Module,
    UINT32                  Line)
{
    ACPI_DEBUG_MEM_BLOCK    *Allocation;
    ACPI_STATUS             Status;


    /* Check for an inadvertent size of zero bytes */

    if (!Size)
    {
        ACPI_WARNING ((Module, Line,
            "Attempt to allocate zero bytes, allocating 1 byte"));
        Size = 1;
    }

    Allocation = AcpiOsAllocate (Size + sizeof (ACPI_DEBUG_MEM_HEADER));
    if (!Allocation)
    {
        /* Report allocation error */

        ACPI_WARNING ((Module, Line,
            "Could not allocate size %u", (UINT32) Size));

        return (NULL);
    }

    Status = AcpiUtTrackAllocation (
        Allocation, Size, ACPI_MEM_MALLOC, Component, Module, Line);
    if (ACPI_FAILURE (Status))
    {
        AcpiOsFree (Allocation);
        return (NULL);
    }

    AcpiGbl_GlobalList->TotalAllocated++;
    AcpiGbl_GlobalList->TotalSize += (UINT32) Size;
    AcpiGbl_GlobalList->CurrentTotalSize += (UINT32) Size;

    if (AcpiGbl_GlobalList->CurrentTotalSize >
        AcpiGbl_GlobalList->MaxOccupied)
    {
        AcpiGbl_GlobalList->MaxOccupied =
            AcpiGbl_GlobalList->CurrentTotalSize;
    }

    return ((void *) &Allocation->UserSpace);
}

void *
AcpiUtAllocate (
    UINT32                  Size,
    UINT32                  Component,
    NATIVE_CHAR             *Module,
    UINT32                  Line)
{
    ACPI_DEBUG_MEM_BLOCK    *Address;
    ACPI_STATUS             Status;


    FUNCTION_TRACE_U32 ("UtAllocate", Size);


    /* Check for an inadvertent size of zero bytes */

    if (!Size)
    {
        _REPORT_ERROR (Module, Line, Component,
                ("UtAllocate: Attempt to allocate zero bytes\n"));
        Size = 1;
    }

    Address = AcpiOsAllocate (Size + sizeof (ACPI_DEBUG_MEM_BLOCK));
    if (!Address)
    {
        /* Report allocation error */

        _REPORT_ERROR (Module, Line, Component,
                ("UtAllocate: Could not allocate size %X\n", Size));

        return_PTR (NULL);
    }

    Status = AcpiUtAddElementToAllocList (ACPI_MEM_LIST_GLOBAL, Address, Size,
                    MEM_MALLOC, Component, Module, Line);
    if (ACPI_FAILURE (Status))
    {
        AcpiOsFree (Address);
        return_PTR (NULL);
    }

    AcpiGbl_MemoryLists[ACPI_MEM_LIST_GLOBAL].TotalAllocated++;
    AcpiGbl_MemoryLists[ACPI_MEM_LIST_GLOBAL].CurrentTotalSize += Size;

    ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n", Address, Size));

    return_PTR ((void *) &Address->UserSpace);
}

void *
AcpiOsAllocateZeroed (
    ACPI_SIZE               Size)
{
    void                    *Mem;


    Mem = AcpiOsAllocate (Size);
    if (Mem)
    {
        ACPI_MEMSET (Mem, 0, Size);
    }

    return (Mem);
}

static char *
FlStrdup (
    char                *String)
{
    char                *NewString;


    NewString = AcpiOsAllocate (strlen (String) + 1);
    if (!NewString)
    {
        return (NULL);
    }

    strcpy (NewString, String);
    return (NewString);
}

ACPI_STATUS
AcpiOsCreateSemaphore (
    UINT32              MaxUnits,
    UINT32              InitialUnits,
    ACPI_HANDLE         *OutHandle)
{
#if 0
    sem_t               *Sem;


    if (!OutHandle)
    {
        return (AE_BAD_PARAMETER);
    }

#ifdef __APPLE__
    {
        char            *SemaphoreName = tmpnam (NULL);

        Sem = sem_open (SemaphoreName, O_EXCL|O_CREAT, 0755, InitialUnits);
        if (!Sem)
        {
            return (AE_NO_MEMORY);
        }
        sem_unlink (SemaphoreName); /* This just deletes the name */
    }

#else
    Sem = AcpiOsAllocate (sizeof (sem_t));
    if (!Sem)
    {
        return (AE_NO_MEMORY);
    }

    if (sem_init (Sem, 0, InitialUnits) == -1)
    {
        AcpiOsFree (Sem);
        return (AE_BAD_PARAMETER);
    }
#endif

    *OutHandle = (ACPI_HANDLE) Sem;
#endif
	*OutHandle = (ACPI_HANDLE) 1;
    return (AE_OK);
}

void *
AcpiOsAllocateZeroed (
    ACPI_SIZE               Size)
{
    void                    *Allocation;


    ACPI_FUNCTION_ENTRY ();


    Allocation = AcpiOsAllocate (Size);
    if (Allocation)
    {
        /* Clear the memory block */

        ACPI_MEMSET (Allocation, 0, Size);
    }

    return (Allocation);
}

ACPI_STATUS
AcpiUtCreateList (
    char                    *ListName,
    UINT16                  ObjectSize,
    ACPI_MEMORY_LIST        **ReturnCache)
{
    ACPI_MEMORY_LIST        *Cache;


    Cache = AcpiOsAllocate (sizeof (ACPI_MEMORY_LIST));
    if (!Cache)
    {
        return (AE_NO_MEMORY);
    }

    ACPI_MEMSET (Cache, 0, sizeof (ACPI_MEMORY_LIST));

    Cache->ListName   = ListName;
    Cache->ObjectSize = ObjectSize;

    *ReturnCache = Cache;
    return (AE_OK);
}

//.........这里部分代码省略.........
    {
        InitFlags |= (ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT);
    }

    /* The remaining arguments are filenames for ACPI tables */

    if (argv[AcpiGbl_Optind])
    {
        AcpiGbl_DbOpt_tables = TRUE;
        TableCount = 0;

        /* Get each of the ACPI table files on the command line */

        while (argv[AcpiGbl_Optind])
        {
            /* Split incoming path into a directory/filename combo */

            Status = FlSplitInputPathname (argv[AcpiGbl_Optind], &Directory, &Filename);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }

            /* Expand wildcards (Windows only) */

            WildcardList = AsDoWildcard (Directory, Filename);
            if (!WildcardList)
            {
                return (-1);
            }

            while (*WildcardList)
            {
                FullPathname = AcpiOsAllocate (
                    strlen (Directory) + strlen (*WildcardList) + 1);

                /* Construct a full path to the file */

                strcpy (FullPathname, Directory);
                strcat (FullPathname, *WildcardList);

                /* Get one table */

                Status = AcpiDbReadTableFromFile (FullPathname, &Table);
                if (ACPI_FAILURE (Status))
                {
                    printf ("**** Could not get input table %s, %s\n", FullPathname,
                        AcpiFormatException (Status));
                    goto enterloop;
                }

                AcpiOsFree (FullPathname);
                AcpiOsFree (*WildcardList);
                *WildcardList = NULL;
                WildcardList++;

                /*
                 * Ignore an FACS or RSDT, we can't use them.
                 */
                if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_FACS) ||
                    ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_RSDT))
                {
                    AcpiOsFree (Table);
                    continue;
                }

ACPI_STATUS
AcpiUtInitializeBuffer (
    ACPI_BUFFER             *Buffer,
    ACPI_SIZE               RequiredLength)
{
    ACPI_SIZE               InputBufferLength;


    /* Parameter validation */

    if (!Buffer || !RequiredLength)
    {
        return (AE_BAD_PARAMETER);
    }

    /*
     * Buffer->Length is used as both an input and output parameter. Get the
     * input actual length and set the output required buffer length.
     */
    InputBufferLength = Buffer->Length;
    Buffer->Length = RequiredLength;

    /*
     * The input buffer length contains the actual buffer length, or the type
     * of buffer to be allocated by this routine.
     */
    switch (InputBufferLength)
    {
    case ACPI_NO_BUFFER:

        /* Return the exception (and the required buffer length) */

        return (AE_BUFFER_OVERFLOW);

    case ACPI_ALLOCATE_BUFFER:

        /* Allocate a new buffer */

        Buffer->Pointer = AcpiOsAllocate (RequiredLength);
        break;

    case ACPI_ALLOCATE_LOCAL_BUFFER:

        /* Allocate a new buffer with local interface to allow tracking */

        Buffer->Pointer = ACPI_ALLOCATE (RequiredLength);
        break;

    default:

        /* Existing buffer: Validate the size of the buffer */

        if (InputBufferLength < RequiredLength)
        {
            return (AE_BUFFER_OVERFLOW);
        }
        break;
    }

    /* Validate allocation from above or input buffer pointer */

    if (!Buffer->Pointer)
    {
        return (AE_NO_MEMORY);
    }

    /* Have a valid buffer, clear it */

    ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);
    return (AE_OK);
}

void
AbComputeChecksum (
    char                    *FilePath)
{
    UINT32                  Actual;
    ACPI_TABLE_HEADER       *Table;
    UINT8                   Checksum;
    FILE                    *File;


    File = fopen (FilePath, "rb");
    if (!File)
    {
        printf ("Could not open file %s\n", FilePath);
        return;
    }

    Actual = fread (&Header1, 1, sizeof (ACPI_TABLE_HEADER), File);
    if (Actual < sizeof (ACPI_TABLE_HEADER))
    {
        printf ("File %s does not contain a valid ACPI table header\n", FilePath);
        goto Exit1;
    }

    if (!AbValidateHeader (&Header1))
    {
        goto Exit1;
    }

    if (!Gbl_TerseMode)
    {
        AbPrintHeaderInfo (&Header1);
    }

    /* Allocate a buffer to hold the entire table */

    Table = AcpiOsAllocate (Header1.Length);
    if (!Table)
    {
        printf ("Could not allocate buffer for table\n");
        goto Exit1;
    }

    /* Read the entire table, including header */

    fseek (File, 0, SEEK_SET);
    Actual = fread (Table, 1, Header1.Length, File);
    if (Actual != Header1.Length)
    {
        printf ("Could not read table, length %u\n", Header1.Length);
        goto Exit2;
    }

    /* Compute the checksum for the table */

    Table->Checksum = 0;

    Checksum = (UINT8) (0 - AcpiTbSumTable (Table, Table->Length));
    printf ("Computed checksum: 0x%X\n\n", Checksum);

    if (Header1.Checksum == Checksum)
    {
        printf ("Checksum OK in AML file, not updating\n");
        goto Exit2;
    }

    /* Open the target file for writing, to update checksum */

    fclose (File);
    File = fopen (FilePath, "r+b");
    if (!File)
    {
        printf ("Could not open file %s for writing\n", FilePath);
        goto Exit2;
    }

    /* Set the checksum, write the new header */

    Header1.Checksum = Checksum;

    Actual = fwrite (&Header1, 1, sizeof (ACPI_TABLE_HEADER), File);
    if (Actual != sizeof (ACPI_TABLE_HEADER))
    {
        printf ("Could not write updated table header\n");
        goto Exit2;
    }

    printf ("Wrote new checksum\n");

Exit2:
    AcpiOsFree (Table);

Exit1:
    if (File)
    {
        fclose (File);
    }
    return;
}

static ACPI_STATUS
AcpiDbReadTable (
    FILE                    *fp,
    ACPI_TABLE_HEADER       **Table,
    UINT32                  *TableLength)
{
    ACPI_TABLE_HEADER       TableHeader;
    UINT32                  Actual;
    ACPI_STATUS             Status;
    UINT32                  FileSize;
    BOOLEAN                 StandardHeader = TRUE;


    /* Get the file size */

    fseek (fp, 0, SEEK_END);
    FileSize = (UINT32) ftell (fp);
    fseek (fp, 0, SEEK_SET);

    if (FileSize < 4)
    {
        return (AE_BAD_HEADER);
    }

    /* Read the signature */

    if (fread (&TableHeader, 1, 4, fp) != 4)
    {
        AcpiOsPrintf ("Could not read the table signature\n");
        return (AE_BAD_HEADER);
    }

    fseek (fp, 0, SEEK_SET);

    /* The RSDT, FACS and S3PT tables do not have standard ACPI headers */

    if (ACPI_COMPARE_NAME (TableHeader.Signature, "RSD ") ||
        ACPI_COMPARE_NAME (TableHeader.Signature, "FACS") ||
        ACPI_COMPARE_NAME (TableHeader.Signature, "S3PT"))
    {
        *TableLength = FileSize;
        StandardHeader = FALSE;
    }
    else
    {
        /* Read the table header */

        if (fread (&TableHeader, 1, sizeof (TableHeader), fp) !=
                sizeof (ACPI_TABLE_HEADER))
        {
            AcpiOsPrintf ("Could not read the table header\n");
            return (AE_BAD_HEADER);
        }

#if 0
        /* Validate the table header/length */

        Status = AcpiTbValidateTableHeader (&TableHeader);
        if (ACPI_FAILURE (Status))
        {
            AcpiOsPrintf ("Table header is invalid!\n");
            return (Status);
        }
#endif

        /* File size must be at least as long as the Header-specified length */

        if (TableHeader.Length > FileSize)
        {
            AcpiOsPrintf (
                "TableHeader length [0x%X] greater than the input file size [0x%X]\n",
                TableHeader.Length, FileSize);
            return (AE_BAD_HEADER);
        }

#ifdef ACPI_OBSOLETE_CODE
        /* We only support a limited number of table types */

        if (ACPI_STRNCMP ((char *) TableHeader.Signature, DSDT_SIG, 4) &&
            ACPI_STRNCMP ((char *) TableHeader.Signature, PSDT_SIG, 4) &&
            ACPI_STRNCMP ((char *) TableHeader.Signature, SSDT_SIG, 4))
        {
            AcpiOsPrintf ("Table signature [%4.4s] is invalid or not supported\n",
                (char *) TableHeader.Signature);
            ACPI_DUMP_BUFFER (&TableHeader, sizeof (ACPI_TABLE_HEADER));
            return (AE_ERROR);
        }
#endif

        *TableLength = TableHeader.Length;
    }

    /* Allocate a buffer for the table */

    *Table = AcpiOsAllocate ((size_t) FileSize);
    if (!*Table)
    {
        AcpiOsPrintf (
            "Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
            TableHeader.Signature, *TableLength);
//.........这里部分代码省略.........

int ACPI_SYSTEM_XFACE
main (
    int                     argc,
    char                    **argv)
{
    ACPI_STATUS             Status;
    UINT32                  InitFlags;
    ACPI_TABLE_HEADER       *Table = NULL;
    UINT32                  TableCount;
    AE_TABLE_DESC           *TableDesc;


    ACPI_DEBUG_INITIALIZE (); /* For debug version only */
    signal (SIGINT, AeCtrlCHandler);

    /* Init debug globals */

    AcpiDbgLevel = ACPI_NORMAL_DEFAULT;
    AcpiDbgLayer = 0xFFFFFFFF;

    /* Init ACPICA and start debugger thread */

    Status = AcpiInitializeSubsystem ();
    AE_CHECK_OK (AcpiInitializeSubsystem, Status);
    if (ACPI_FAILURE (Status))
    {
        goto ErrorExit;
    }

    printf (ACPI_COMMON_SIGNON (ACPIEXEC_NAME));
    if (argc < 2)
    {
        usage ();
        (void) AcpiOsTerminate ();
        return (0);
    }

    /* Get the command line options */

    if (AeDoOptions (argc, argv))
    {
        goto ErrorExit;
    }

    /* The remaining arguments are filenames for ACPI tables */

    if (!argv[AcpiGbl_Optind])
    {
        goto EnterDebugger;
    }

    AcpiGbl_DbOpt_tables = TRUE;
    AcpiGbl_CstyleDisassembly = FALSE; /* Not supported for AcpiExec */
    TableCount = 0;

    /* Get each of the ACPI table files on the command line */

    while (argv[AcpiGbl_Optind])
    {
        /* Get one entire table */

        Status = AcpiUtReadTableFromFile (argv[AcpiGbl_Optind], &Table);
        if (ACPI_FAILURE (Status))
        {
            printf ("**** Could not get table from file %s, %s\n",
                argv[AcpiGbl_Optind], AcpiFormatException (Status));
            goto ErrorExit;
        }

        /* Ignore non-AML tables, we can't use them. Except for an FADT */

        if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_FADT) &&
            !AcpiUtIsAmlTable (Table))
        {
            ACPI_INFO ((AE_INFO,
                "Table [%4.4s] is not an AML table, ignoring",
                Table->Signature));
            AcpiOsFree (Table);
        }
        else
        {
            /* Allocate and link a table descriptor */

            TableDesc = AcpiOsAllocate (sizeof (AE_TABLE_DESC));
            TableDesc->Table = Table;
            TableDesc->Next = AeTableListHead;
            AeTableListHead = TableDesc;

            TableCount++;
        }

        AcpiGbl_Optind++;
    }

    printf ("\n");

    /* Build a local RSDT with all tables and let ACPICA process the RSDT */

    Status = AeBuildLocalTables (TableCount, AeTableListHead);
    if (ACPI_FAILURE (Status))
//.........这里部分代码省略.........

static ACPI_STATUS
AcpiUtReadTable (
    FILE                    *fp,
    ACPI_TABLE_HEADER       **Table,
    UINT32                  *TableLength)
{
    ACPI_TABLE_HEADER       TableHeader;
    UINT32                  Actual;
    ACPI_STATUS             Status;
    UINT32                  FileSize;
    BOOLEAN                 StandardHeader = TRUE;
    INT32                   Count;

    /* Get the file size */

    FileSize = CmGetFileSize (fp);
    if (FileSize == ACPI_UINT32_MAX)
    {
        return (AE_ERROR);
    }

    if (FileSize < 4)
    {
        return (AE_BAD_HEADER);
    }

    /* Read the signature */

    fseek (fp, 0, SEEK_SET);

    Count = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), fp);
    if (Count != sizeof (ACPI_TABLE_HEADER))
    {
        AcpiOsPrintf ("Could not read the table header\n");
        return (AE_BAD_HEADER);
    }

    /* The RSDP table does not have standard ACPI header */

    if (ACPI_VALIDATE_RSDP_SIG (TableHeader.Signature))
    {
        *TableLength = FileSize;
        StandardHeader = FALSE;
    }
    else
    {

#if 0
        /* Validate the table header/length */

        Status = AcpiTbValidateTableHeader (&TableHeader);
        if (ACPI_FAILURE (Status))
        {
            AcpiOsPrintf ("Table header is invalid!\n");
            return (Status);
        }
#endif

        /* File size must be at least as long as the Header-specified length */

        if (TableHeader.Length > FileSize)
        {
            AcpiOsPrintf (
                "TableHeader length [0x%X] greater than the input file size [0x%X]\n",
                TableHeader.Length, FileSize);

#ifdef ACPI_ASL_COMPILER
            AcpiOsPrintf ("File is corrupt or is ASCII text -- "
                          "it must be a binary file\n");
#endif
            return (AE_BAD_HEADER);
        }

#ifdef ACPI_OBSOLETE_CODE
        /* We only support a limited number of table types */

        if (!ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_DSDT) &&
                !ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_PSDT) &&
                !ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_SSDT))
        {
            AcpiOsPrintf ("Table signature [%4.4s] is invalid or not supported\n",
                          (char *) TableHeader.Signature);
            ACPI_DUMP_BUFFER (&TableHeader, sizeof (ACPI_TABLE_HEADER));
            return (AE_ERROR);
        }
#endif

        *TableLength = TableHeader.Length;
    }

    /* Allocate a buffer for the table */

    *Table = AcpiOsAllocate ((size_t) FileSize);
    if (!*Table)
    {
        AcpiOsPrintf (
            "Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
            TableHeader.Signature, *TableLength);
        return (AE_NO_MEMORY);
    }
//.........这里部分代码省略.........

ACPI_STATUS
AcpiUtInitializeBuffer (
    ACPI_BUFFER             *Buffer,
    ACPI_SIZE               RequiredLength)
{
    ACPI_STATUS             Status = AE_OK;


    switch (Buffer->Length)
    {
    case ACPI_NO_BUFFER:

        /* Set the exception and returned the required length */

        Status = AE_BUFFER_OVERFLOW;
        break;


    case ACPI_ALLOCATE_BUFFER:

        /* Allocate a new buffer */

        Buffer->Pointer = AcpiOsAllocate (RequiredLength);
        if (!Buffer->Pointer)
        {
            return (AE_NO_MEMORY);
        }

        /* Clear the buffer */

        ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);
        break;


    case ACPI_ALLOCATE_LOCAL_BUFFER:

        /* Allocate a new buffer with local interface to allow tracking */

        Buffer->Pointer = ACPI_ALLOCATE_ZEROED (RequiredLength);
        if (!Buffer->Pointer)
        {
            return (AE_NO_MEMORY);
        }
        break;


    default:

        /* Existing buffer: Validate the size of the buffer */

        if (Buffer->Length < RequiredLength)
        {
            Status = AE_BUFFER_OVERFLOW;
            break;
        }

        /* Clear the buffer */

        ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);
        break;
    }

    Buffer->Length = RequiredLength;
    return (Status);
}

ACPI_STATUS
AcpiDbInitialize (
    void)
{
    ACPI_STATUS             Status;


    /* Init globals */

    AcpiGbl_DbBuffer            = NULL;
    AcpiGbl_DbFilename          = NULL;
    AcpiGbl_DbOutputToFile      = FALSE;

    AcpiGbl_DbDebugLevel        = ACPI_LV_VERBOSITY2;
    AcpiGbl_DbConsoleDebugLevel = ACPI_NORMAL_DEFAULT | ACPI_LV_TABLES;
    AcpiGbl_DbOutputFlags       = ACPI_DB_CONSOLE_OUTPUT;

    AcpiGbl_DbOpt_tables        = FALSE;
    AcpiGbl_DbOpt_stats         = FALSE;
#ifdef ACPI_DISASSEMBLER
    AcpiGbl_DbOpt_disasm        = FALSE;
    AcpiGbl_DbOpt_verbose       = TRUE;
#endif
    AcpiGbl_DbOpt_ini_methods   = TRUE;

    AcpiGbl_DbBuffer = AcpiOsAllocate (ACPI_DEBUG_BUFFER_SIZE);
    if (!AcpiGbl_DbBuffer)
    {
        return (AE_NO_MEMORY);
    }
    ACPI_MEMSET (AcpiGbl_DbBuffer, 0, ACPI_DEBUG_BUFFER_SIZE);

    /* Initial scope is the root */

    AcpiGbl_DbScopeBuf [0] = '\\';
    AcpiGbl_DbScopeBuf [1] =  0;
    AcpiGbl_DbScopeNode = AcpiGbl_RootNode;

    /*
     * If configured for multi-thread support, the debug executor runs in
     * a separate thread so that the front end can be in another address
     * space, environment, or even another machine.
     */
    if (AcpiGbl_DebuggerConfiguration & DEBUGGER_MULTI_THREADED)
    {
        /* These were created with one unit, grab it */

        Status = AcpiUtAcquireMutex (ACPI_MTX_DEBUG_CMD_COMPLETE);
        if (ACPI_FAILURE (Status))
        {
            AcpiOsPrintf ("Could not get debugger mutex\n");
            return (Status);
        }

        Status = AcpiUtAcquireMutex (ACPI_MTX_DEBUG_CMD_READY);
        if (ACPI_FAILURE (Status))
        {
            AcpiOsPrintf ("Could not get debugger mutex\n");
            return (Status);
        }

        /* Create the debug execution thread to execute commands */

        Status = AcpiOsExecute (OSL_DEBUGGER_THREAD, AcpiDbExecuteThread, NULL);
        if (ACPI_FAILURE (Status))
        {
            AcpiOsPrintf ("Could not start debugger thread\n");
            return (Status);
        }
    }

#ifdef ACPI_DISASSEMBLER
    if (!AcpiGbl_DbOpt_verbose)
    {
        AcpiGbl_DbOpt_disasm = TRUE;
        AcpiGbl_DbOpt_stats = FALSE;
    }
#endif

    return (AE_OK);
}

//.........这里部分代码省略.........
    }

    /*
     * 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;
        }