/**
 * radeon_atpx_call - call an ATPX method
 *
 * @handle: acpi handle
 * @function: the ATPX function to execute
 * @params: ATPX function params
 *
 * Executes the requested ATPX function (all asics).
 * Returns a pointer to the acpi output buffer.
 */
static ACPI_OBJECT *radeon_atpx_call(ACPI_HANDLE handle, int function,
					   ACPI_BUFFER *params)
{
	ACPI_STATUS status;
	ACPI_OBJECT atpx_arg_elements[2];
	ACPI_OBJECT_LIST atpx_arg;
	ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL };

	atpx_arg.Count = 2;
	atpx_arg.Pointer = &atpx_arg_elements[0];

	atpx_arg_elements[0].Type = ACPI_TYPE_INTEGER;
	atpx_arg_elements[0].Integer.Value = function;

	if (params) {
		atpx_arg_elements[1].Type = ACPI_TYPE_BUFFER;
		atpx_arg_elements[1].Buffer.Length = params->Length;
		atpx_arg_elements[1].Buffer.Pointer = params->Pointer;
	} else {
		/* We need a second fake parameter */
		atpx_arg_elements[1].Type = ACPI_TYPE_INTEGER;
		atpx_arg_elements[1].Integer.Value = 0;
	}

	status = AcpiEvaluateObject(handle, NULL, &atpx_arg, &buffer);

	/* Fail only if calling the method fails and ATPX is supported */
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		DRM_ERROR("failed to evaluate ATPX got %s\n",
		       AcpiFormatException(status));
		AcpiOsFree(buffer.Pointer);
		return NULL;
	}

	return buffer.Pointer;
}

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


    Allocation = AcpiUtAllocate (Size + sizeof (ACPI_DEBUG_MEM_HEADER),
                    Component, Module, Line);
    if (!Allocation)
    {
        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);
}

static int
acpi_panasonic_hkey_event(struct acpi_panasonic_softc *sc, ACPI_HANDLE h,
    UINT32 *arg)
{
	ACPI_BUFFER buf;
	ACPI_OBJECT *res;
	ACPI_INTEGER val;
	int status;

	ACPI_SERIAL_ASSERT(panasonic);
	status = ENXIO;

	buf.Length = ACPI_ALLOCATE_BUFFER;
	buf.Pointer = NULL;
	AcpiEvaluateObject(h, "HINF", NULL, &buf);
	res = (ACPI_OBJECT *)buf.Pointer;
	if (res->Type != ACPI_TYPE_INTEGER) {
		device_printf(sc->dev, "HINF returned non-integer\n");
		goto end;
	}
	val = res->Integer.Value;
#ifdef ACPI_PANASONIC_DEBUG
	device_printf(sc->dev, "%s button Fn+F%d\n",
		      (val & 0x80) ? "Pressed" : "Released",
		      (int)(val & 0x7f));
#endif
	if ((val & 0x7f) > 0 && (val & 0x7f) < 11) {
		*arg = val;
		status = 0;
	}
end:
	if (buf.Pointer)
		AcpiOsFree(buf.Pointer);

	return (status);
}

static 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 = 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;

            /* Free a buffer created via ACPI_ALLOCATE_BUFFER */

            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);
}

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

    /* Put command into the next available slot */

    CmdLen = (UINT16) strlen (CommandLine);
    if (!CmdLen)
    {
        return;
    }

    if (AcpiGbl_HistoryBuffer[AcpiGbl_NextHistoryIndex].Command != NULL)
    {
        BufferLen = (UINT16) 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);
    }

    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++;
    }
}

//.........这里部分代码省略.........
        ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 1);
    ACPI_CHECK_OK (AcpiEnableGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 2,
        ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 2);
    ACPI_CHECK_OK (AcpiEnableGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 3,
        ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiInstallGpeHandler (NULL, 4,
        ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiInstallGpeHandler (NULL, 5,
        ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

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

    Status = AcpiSetupGpeForWake (Handle, NULL, 5);
    ACPI_CHECK_OK (AcpiSetupGpeForWake, Status);

    Status = AcpiSetGpeWakeMask (NULL, 5, ACPI_GPE_ENABLE);
    ACPI_CHECK_OK (AcpiSetGpeWakeMask, Status);

    Status = AcpiSetupGpeForWake (Handle, NULL, 6);
    ACPI_CHECK_OK (AcpiSetupGpeForWake, Status);

    Status = AcpiSetupGpeForWake (ACPI_ROOT_OBJECT, NULL, 6);
    ACPI_CHECK_OK (AcpiSetupGpeForWake, Status);

    Status = AcpiSetupGpeForWake (Handle, NULL, 9);
    ACPI_CHECK_OK (AcpiSetupGpeForWake, Status);

    Status = AcpiInstallGpeHandler (NULL, 0x19,
        ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 0x19);
    ACPI_CHECK_OK (AcpiEnableGpe, Status);


    /* GPE block 1 */

    Status = AcpiInstallGpeHandler (NULL, 101,
        ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    ACPI_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 101);
    ACPI_CHECK_OK (AcpiEnableGpe, Status);

    Status = AcpiDisableGpe (NULL, 101);
    ACPI_CHECK_OK (AcpiDisableGpe, Status);

    AfInstallGpeBlock ();

    /* Here is where the GPEs are actually "enabled" */

    Status = AcpiUpdateAllGpes ();
    ACPI_CHECK_OK (AcpiUpdateAllGpes, Status);

    Status = AcpiGetHandle (NULL, "RSRC", &Handle);
    if (ACPI_SUCCESS (Status))
    {
        ReturnBuf.Length = ACPI_ALLOCATE_BUFFER;

        Status = AcpiGetVendorResource (Handle, "_CRS", &Uuid, &ReturnBuf);
        if (ACPI_SUCCESS (Status))
        {
            AcpiOsFree (ReturnBuf.Pointer);
        }
    }

    /* Test global lock */

    Status = AcpiAcquireGlobalLock (0xFFFF, &LockHandle1);
    ACPI_CHECK_OK (AcpiAcquireGlobalLock, Status);

    Status = AcpiAcquireGlobalLock (0x5, &LockHandle2);
    ACPI_CHECK_OK (AcpiAcquireGlobalLock, Status);

    Status = AcpiReleaseGlobalLock (LockHandle1);
    ACPI_CHECK_OK (AcpiReleaseGlobalLock, Status);

    Status = AcpiReleaseGlobalLock (LockHandle2);
    ACPI_CHECK_OK (AcpiReleaseGlobalLock, Status);

#endif /* !ACPI_REDUCED_HARDWARE */
}

//.........这里部分代码省略.........
    struct acpi_ec_params *params;
    static char *ec_ids[] = { "PNP0C09", NULL };

    /* Check that this is a device and that EC is not disabled. */
    if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("ec"))
	return (ENXIO);

    /*
     * If probed via ECDT, set description and continue.  Otherwise,
     * we can access the namespace and make sure this is not a
     * duplicate probe.
     */
    ret = ENXIO;
    ecdt = 0;
    buf.Pointer = NULL;
    buf.Length = ACPI_ALLOCATE_BUFFER;
    params = acpi_get_private(dev);
    if (params != NULL) {
	ecdt = 1;
	ret = 0;
    } else if (ACPI_ID_PROBE(device_get_parent(dev), dev, ec_ids)) {
	params = kmalloc(sizeof(struct acpi_ec_params), M_TEMP,
			M_WAITOK | M_ZERO);
	h = acpi_get_handle(dev);

	/*
	 * Read the unit ID to check for duplicate attach and the
	 * global lock value to see if we should acquire it when
	 * accessing the EC.
	 */
	status = acpi_GetInteger(h, "_UID", &params->uid);
	if (ACPI_FAILURE(status))
	    params->uid = 0;
	status = acpi_GetInteger(h, "_GLK", &params->glk);
	if (ACPI_FAILURE(status))
	    params->glk = 0;

	/*
	 * Evaluate the _GPE method to find the GPE bit used by the EC to
	 * signal status (SCI).  If it's a package, it contains a reference
	 * and GPE bit, similar to _PRW.
	 */
	status = AcpiEvaluateObject(h, "_GPE", NULL, &buf);
	if (ACPI_FAILURE(status)) {
	    device_printf(dev, "can't evaluate _GPE - %s\n",
			  AcpiFormatException(status));
	    goto out;
	}
	obj = (ACPI_OBJECT *)buf.Pointer;
	if (obj == NULL)
	    goto out;

	switch (obj->Type) {
	case ACPI_TYPE_INTEGER:
	    params->gpe_handle = NULL;
	    params->gpe_bit = obj->Integer.Value;
	    break;
	case ACPI_TYPE_PACKAGE:
	    if (!ACPI_PKG_VALID(obj, 2))
		goto out;
	    params->gpe_handle =
		acpi_GetReference(NULL, &obj->Package.Elements[0]);
	    if (params->gpe_handle == NULL ||
		acpi_PkgInt32(obj, 1, &params->gpe_bit) != 0)
		goto out;
	    break;
	default:
	    device_printf(dev, "_GPE has invalid type %d\n", obj->Type);
	    goto out;
	}

	/* Store the values we got from the namespace for attach. */
	acpi_set_private(dev, params);

	/*
	 * Check for a duplicate probe.  This can happen when a probe
	 * via ECDT succeeded already.  If this is a duplicate, disable
	 * this device.
	 */
	peer = devclass_get_device(acpi_ec_devclass, params->uid);
	if (peer == NULL || !device_is_alive(peer))
	    ret = 0;
	else
	    device_disable(dev);
    }

out:
    if (ret == 0) {
	ksnprintf(desc, sizeof(desc), "Embedded Controller: GPE %#x%s%s",
		 params->gpe_bit, (params->glk) ? ", GLK" : "",
		 ecdt ? ", ECDT" : "");
	device_set_desc_copy(dev, desc);
    }

    if (ret > 0 && params)
	kfree(params, M_TEMP);
    if (buf.Pointer)
	AcpiOsFree(buf.Pointer);
    return (ret);
}

static int
aibs_sysctl(SYSCTL_HANDLER_ARGS)
{
	struct aibs_softc	*sc = arg1;
	enum aibs_type		st = arg2;
	int			i = oidp->oid_number;
	ACPI_STATUS		rs;
	ACPI_OBJECT		p, *bp;
	ACPI_OBJECT_LIST	mp;
	ACPI_BUFFER		b;
	char			*name;
	struct aibs_sensor	*as;
	ACPI_INTEGER		v, l, h;
	int			so[3];

	switch (st) {
	case AIBS_VOLT:
		name = "RVLT";
		as = sc->sc_asens_volt;
		break;
	case AIBS_TEMP:
		name = "RTMP";
		as = sc->sc_asens_temp;
		break;
	case AIBS_FAN:
		name = "RFAN";
		as = sc->sc_asens_fan;
		break;
	default:
		return ENOENT;
	}
	if (as == NULL)
		return ENOENT;
	l = as[i].l;
	h = as[i].h;
	p.Type = ACPI_TYPE_INTEGER;
	p.Integer.Value = as[i].i;
	mp.Count = 1;
	mp.Pointer = &p;
	b.Length = ACPI_ALLOCATE_BUFFER;
	ACPI_SERIAL_BEGIN(aibs);
	rs = AcpiEvaluateObjectTyped(sc->sc_ah, name, &mp, &b,
	    ACPI_TYPE_INTEGER);
	if (ACPI_FAILURE(rs)) {
		ddevice_printf(sc->sc_dev,
		    "%s: %i: evaluation failed\n",
		    name, i);
		ACPI_SERIAL_END(aibs);
		return EIO;
	}
	bp = b.Pointer;
	v = bp->Integer.Value;
	AcpiOsFree(b.Pointer);
	ACPI_SERIAL_END(aibs);

	switch (st) {
	case AIBS_VOLT:
		break;
	case AIBS_TEMP:
		v += 2731;
		l += 2731;
		h += 2731;
		break;
	case AIBS_FAN:
		break;
	}
	so[0] = v;
	so[1] = l;
	so[2] = h;
	return sysctl_handle_opaque(oidp, &so, sizeof(so), req);
}

static ACPI_STATUS
AcpiDbReadFromObject (
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_OBJECT_TYPE        ExpectedType,
    ACPI_OBJECT             **Value)
{
    ACPI_OBJECT             *RetValue;
    ACPI_OBJECT_LIST        ParamObjects;
    ACPI_OBJECT             Params[2];
    ACPI_BUFFER             ReturnObj;
    ACPI_STATUS             Status;


    Params[0].Type = ACPI_TYPE_LOCAL_REFERENCE;
    Params[0].Reference.ActualType = Node->Type;
    Params[0].Reference.Handle = ACPI_CAST_PTR (ACPI_HANDLE, Node);

    ParamObjects.Count = 1;
    ParamObjects.Pointer = Params;

    ReturnObj.Length  = ACPI_ALLOCATE_BUFFER;

    AcpiGbl_MethodExecuting = TRUE;
    Status = AcpiEvaluateObject (ReadHandle, NULL,
        &ParamObjects, &ReturnObj);
    AcpiGbl_MethodExecuting = FALSE;

    if (ACPI_FAILURE (Status))
    {
        AcpiOsPrintf ("Could not read from object, %s",
            AcpiFormatException (Status));
        return (Status);
    }

    RetValue = (ACPI_OBJECT *) ReturnObj.Pointer;

    switch (RetValue->Type)
    {
    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_BUFFER:
    case ACPI_TYPE_STRING:
        /*
         * Did we receive the type we wanted? Most important for the
         * Integer/Buffer case (when a field is larger than an Integer,
         * it should return a Buffer).
         */
        if (RetValue->Type != ExpectedType)
        {
            AcpiOsPrintf (" Type mismatch:  Expected %s, Received %s",
                AcpiUtGetTypeName (ExpectedType),
                AcpiUtGetTypeName (RetValue->Type));

            return (AE_TYPE);
        }

        *Value = RetValue;
        break;

    default:

        AcpiOsPrintf (" Unsupported return object type, %s",
            AcpiUtGetTypeName (RetValue->Type));

        AcpiOsFree (ReturnObj.Pointer);
        return (AE_TYPE);
    }

    return (Status);
}

static ACPI_STATUS
AcpiDbTestStringType (
    ACPI_NAMESPACE_NODE     *Node,
    UINT32                  ByteLength)
{
    ACPI_OBJECT             *Temp1 = NULL;
    ACPI_OBJECT             *Temp2 = NULL;
    ACPI_OBJECT             *Temp3 = NULL;
    char                    *ValueToWrite = "Test String from AML Debugger";
    ACPI_OBJECT             WriteValue;
    ACPI_STATUS             Status;


    /* Read the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_STRING, &Temp1);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    AcpiOsPrintf (" (%4.4X/%3.3X) \"%s\"", (Temp1->String.Length * 8),
        Temp1->String.Length, Temp1->String.Pointer);

    /* Write a new value */

    WriteValue.Type = ACPI_TYPE_STRING;
    WriteValue.String.Length = strlen (ValueToWrite);
    WriteValue.String.Pointer = ValueToWrite;

    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the new value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_STRING, &Temp2);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (strcmp (Temp2->String.Pointer, ValueToWrite))
    {
        AcpiOsPrintf (" MISMATCH 2: %s, expecting %s",
            Temp2->String.Pointer, ValueToWrite);
    }

    /* Write back the original value */

    WriteValue.String.Length = strlen (Temp1->String.Pointer);
    WriteValue.String.Pointer = Temp1->String.Pointer;

    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_STRING, &Temp3);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (strcmp (Temp1->String.Pointer, Temp3->String.Pointer))
    {
        AcpiOsPrintf (" MISMATCH 3: %s, expecting %s",
            Temp3->String.Pointer, Temp1->String.Pointer);
    }

Exit:
    if (Temp1) {AcpiOsFree (Temp1);}
    if (Temp2) {AcpiOsFree (Temp2);}
    if (Temp3) {AcpiOsFree (Temp3);}
    return (Status);
}

//.........这里部分代码省略.........
    {
        AcpiOsPrintf (" Ignoring zero length buffer");
        return (AE_OK);
    }

    /* Allocate a local buffer */

    Buffer = ACPI_ALLOCATE_ZEROED (ByteLength);
    if (!Buffer)
    {
        return (AE_NO_MEMORY);
    }

    /* Read the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp1);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Emit a few bytes of the buffer */

    AcpiOsPrintf (" (%4.4X/%3.3X)", BitLength, Temp1->Buffer.Length);
    for (i = 0; ((i < 4) && (i < ByteLength)); i++)
    {
        AcpiOsPrintf (" %2.2X", Temp1->Buffer.Pointer[i]);
    }
    AcpiOsPrintf ("...  ");

    /*
     * Write a new value.
     *
     * Handle possible extra bits at the end of the buffer. Can
     * happen for FieldUnits larger than an integer, but the bit
     * count is not an integral number of bytes. Zero out the
     * unused bits.
     */
    memset (Buffer, BUFFER_FILL_VALUE, ByteLength);
    ExtraBits = BitLength % 8;
    if (ExtraBits)
    {
        Buffer [ByteLength - 1] = ACPI_MASK_BITS_ABOVE (ExtraBits);
    }

    WriteValue.Type = ACPI_TYPE_BUFFER;
    WriteValue.Buffer.Length = ByteLength;
    WriteValue.Buffer.Pointer = Buffer;

    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the new value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp2);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (memcmp (Temp2->Buffer.Pointer, Buffer, ByteLength))
    {
        AcpiOsPrintf (" MISMATCH 2: New buffer value");
    }

    /* Write back the original value */

    WriteValue.Buffer.Length = ByteLength;
    WriteValue.Buffer.Pointer = Temp1->Buffer.Pointer;

    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_BUFFER, &Temp3);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (memcmp (Temp1->Buffer.Pointer,
            Temp3->Buffer.Pointer, ByteLength))
    {
        AcpiOsPrintf (" MISMATCH 3: While restoring original buffer");
    }

Exit:
    ACPI_FREE (Buffer);
    if (Temp1) {AcpiOsFree (Temp1);}
    if (Temp2) {AcpiOsFree (Temp2);}
    if (Temp3) {AcpiOsFree (Temp3);}
    return (Status);
}

static ACPI_STATUS
AcpiDbTestIntegerType (
    ACPI_NAMESPACE_NODE     *Node,
    UINT32                  BitLength)
{
    ACPI_OBJECT             *Temp1 = NULL;
    ACPI_OBJECT             *Temp2 = NULL;
    ACPI_OBJECT             *Temp3 = NULL;
    ACPI_OBJECT             WriteValue;
    UINT64                  ValueToWrite;
    ACPI_STATUS             Status;


    if (BitLength > 64)
    {
        AcpiOsPrintf (" Invalid length for an Integer: %u", BitLength);
        return (AE_OK);
    }

    /* Read the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_INTEGER, &Temp1);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    AcpiOsPrintf (" (%4.4X/%3.3X) %8.8X%8.8X",
        BitLength, ACPI_ROUND_BITS_UP_TO_BYTES (BitLength),
        ACPI_FORMAT_UINT64 (Temp1->Integer.Value));

    ValueToWrite = ACPI_UINT64_MAX >> (64 - BitLength);
    if (Temp1->Integer.Value == ValueToWrite)
    {
        ValueToWrite = 0;
    }

    /* Write a new value */

    WriteValue.Type = ACPI_TYPE_INTEGER;
    WriteValue.Integer.Value = ValueToWrite;
    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the new value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_INTEGER, &Temp2);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (Temp2->Integer.Value != ValueToWrite)
    {
        AcpiOsPrintf (" MISMATCH 2: %8.8X%8.8X, expecting %8.8X%8.8X",
            ACPI_FORMAT_UINT64 (Temp2->Integer.Value),
            ACPI_FORMAT_UINT64 (ValueToWrite));
    }

    /* Write back the original value */

    WriteValue.Integer.Value = Temp1->Integer.Value;
    Status = AcpiDbWriteToObject (Node, &WriteValue);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Ensure that we can read back the original value */

    Status = AcpiDbReadFromObject (Node, ACPI_TYPE_INTEGER, &Temp3);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (Temp3->Integer.Value != Temp1->Integer.Value)
    {
        AcpiOsPrintf (" MISMATCH 3: %8.8X%8.8X, expecting %8.8X%8.8X",
            ACPI_FORMAT_UINT64 (Temp3->Integer.Value),
            ACPI_FORMAT_UINT64 (Temp1->Integer.Value));
    }

Exit:
    if (Temp1) {AcpiOsFree (Temp1);}
    if (Temp2) {AcpiOsFree (Temp2);}
    if (Temp3) {AcpiOsFree (Temp3);}
    return (AE_OK);
}

/*
 * Parse the current state of this thermal zone and set up to use it.
 *
 * Note that we may have previous state, which will have to be discarded.
 */
static int
acpi_tz_establish(struct acpi_tz_softc *sc)
{
    ACPI_OBJECT	*obj;
    int		i;
    char	nbuf[8];

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

    /* Erase any existing state. */
    for (i = 0; i < TZ_NUMLEVELS; i++)
	if (sc->tz_zone.al[i].Pointer != NULL)
	    AcpiOsFree(sc->tz_zone.al[i].Pointer);
    if (sc->tz_zone.psl.Pointer != NULL)
	AcpiOsFree(sc->tz_zone.psl.Pointer);

    /*
     * XXX: We initialize only ACPI_BUFFER to avoid race condition
     * with passive cooling thread which refers psv, tc1, tc2 and tsp.
     */
    bzero(sc->tz_zone.ac, sizeof(sc->tz_zone.ac));
    bzero(sc->tz_zone.al, sizeof(sc->tz_zone.al));
    bzero(&sc->tz_zone.psl, sizeof(sc->tz_zone.psl));

    /* Evaluate thermal zone parameters. */
    for (i = 0; i < TZ_NUMLEVELS; i++) {
	sprintf(nbuf, "_AC%d", i);
	acpi_tz_getparam(sc, nbuf, &sc->tz_zone.ac[i]);
	sprintf(nbuf, "_AL%d", i);
	sc->tz_zone.al[i].Length = ACPI_ALLOCATE_BUFFER;
	sc->tz_zone.al[i].Pointer = NULL;
	AcpiEvaluateObject(sc->tz_handle, nbuf, NULL, &sc->tz_zone.al[i]);
	obj = (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer;
	if (obj != NULL) {
	    /* Should be a package containing a list of power objects */
	    if (obj->Type != ACPI_TYPE_PACKAGE) {
		device_printf(sc->tz_dev, "%s has unknown type %d, rejecting\n",
			      nbuf, obj->Type);
		return_VALUE (ENXIO);
	    }
	}
    }
    acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt);
    acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot);
    sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER;
    sc->tz_zone.psl.Pointer = NULL;
    AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl);
    acpi_tz_getparam(sc, "_PSV", &sc->tz_zone.psv);
    acpi_tz_getparam(sc, "_TC1", &sc->tz_zone.tc1);
    acpi_tz_getparam(sc, "_TC2", &sc->tz_zone.tc2);
    acpi_tz_getparam(sc, "_TSP", &sc->tz_zone.tsp);
    acpi_tz_getparam(sc, "_TZP", &sc->tz_zone.tzp);

    /*
     * Sanity-check the values we've been given.
     *
     * XXX what do we do about systems that give us the same value for
     *     more than one of these setpoints?
     */
    acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT");
    acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT");
    acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV");
    for (i = 0; i < TZ_NUMLEVELS; i++)
	acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx");

    return_VALUE (0);
}

//.........这里部分代码省略.........
     */
    Status = AcpiInstallGpeHandler (NULL, 0, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 0);
    AE_CHECK_OK (AcpiEnableGpe, Status);

    Status = AcpiRemoveGpeHandler (NULL, 0, AeGpeHandler);
    AE_CHECK_OK (AcpiRemoveGpeHandler, Status);

    Status = AcpiInstallGpeHandler (NULL, 0, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 0);
    AE_CHECK_OK (AcpiEnableGpe, Status);

    Status = AcpiSetGpe (NULL, 0, ACPI_GPE_DISABLE);
    AE_CHECK_OK (AcpiSetGpe, Status);

    Status = AcpiSetGpe (NULL, 0, ACPI_GPE_ENABLE);
    AE_CHECK_OK (AcpiSetGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 1, ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 1);
    AE_CHECK_OK (AcpiEnableGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 2, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 2);
    AE_CHECK_OK (AcpiEnableGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 3, ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiInstallGpeHandler (NULL, 4, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiInstallGpeHandler (NULL, 5, ACPI_GPE_EDGE_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);


    Status = AcpiInstallGpeHandler (NULL, 0x19, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 0x19);
    AE_CHECK_OK (AcpiEnableGpe, Status);


    Status = AcpiInstallGpeHandler (NULL, 0x62, ACPI_GPE_LEVEL_TRIGGERED, AeGpeHandler, NULL);
    AE_CHECK_OK (AcpiInstallGpeHandler, Status);

    Status = AcpiEnableGpe (NULL, 0x62);
    AE_CHECK_OK (AcpiEnableGpe, Status);

    Status = AcpiDisableGpe (NULL, 0x62);
    AE_CHECK_OK (AcpiDisableGpe, Status);

    AfInstallGpeBlock ();


    Status = AcpiGetHandle (NULL, "RSRC", &Handle);
    if (ACPI_SUCCESS (Status))
    {
        ReturnBuf.Length = ACPI_ALLOCATE_BUFFER;

        Status = AcpiGetVendorResource (Handle, "_CRS", &Uuid, &ReturnBuf);
        if (ACPI_SUCCESS (Status))
        {
            AcpiOsFree (ReturnBuf.Pointer);
        }
    }

    /* Test global lock */

    Status = AcpiAcquireGlobalLock (0xFFFF, &LockHandle1);
    AE_CHECK_OK (AcpiAcquireGlobalLock, Status);

    Status = AcpiAcquireGlobalLock (0x5, &LockHandle2);
    AE_CHECK_OK (AcpiAcquireGlobalLock, Status);

    Status = AcpiReleaseGlobalLock (LockHandle1);
    AE_CHECK_OK (AcpiReleaseGlobalLock, Status);

    Status = AcpiReleaseGlobalLock (LockHandle2);
    AE_CHECK_OK (AcpiReleaseGlobalLock, Status);

    /* Get Devices */

    Status = AcpiGetDevices (NULL, AeGetDevices, NULL, NULL);
    AE_CHECK_OK (AcpiGetDevices, Status);

    Status = AcpiGetStatistics (&Stats);
    AE_CHECK_OK (AcpiGetStatistics, Status);
}

//.........这里部分代码省略.........
            /*
             * Somewhere along the way, MS changed the registry entry for
             * the FADT from
             * HARDWARE/ACPI/FACP  to
             * HARDWARE/ACPI/FADT.
             *
             * This code allows for both.
             */
            if (ACPI_COMPARE_NAME (Signature, "FACP"))
            {
                Signature = "FADT";
            }
            else
            {
                AcpiOsPrintf ("Could not find %s in registry at %s\n",
                    Signature, KeyBuffer);
                return (NULL);
            }
        }
        else
        {
            break;
        }
    }

    /* Actual data for table is down a couple levels */

    for (i = 0; ;)
    {
        Status = RegEnumKey (Handle, i, KeyBuffer, sizeof (KeyBuffer));
        i += 1;
        if (Status == ERROR_NO_MORE_ITEMS)
        {
            break;
        }

        Status = RegOpenKey (Handle, KeyBuffer, &SubKey);
        if (Status != ERROR_SUCCESS)
        {
            AcpiOsPrintf ("Could not open %s entry\n", Signature);
            return (NULL);
        }

        RegCloseKey (Handle);
        Handle = SubKey;
        i = 0;
    }

    /* Find the (binary) table entry */

    for (i = 0; ;)
    {
        NameSize = sizeof (KeyBuffer);
        Status = RegEnumValue (Handle, i, KeyBuffer, &NameSize,
                    NULL, &Type, NULL, 0);
        if (Status != ERROR_SUCCESS)
        {
            AcpiOsPrintf ("Could not get %s registry entry\n", Signature);
            return (NULL);
        }

        if (Type == REG_BINARY)
        {
            break;
        }
        i += 1;
    }

    /* Get the size of the table */

    Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL, NULL, &DataSize);
    if (Status != ERROR_SUCCESS)
    {
        AcpiOsPrintf ("Could not read the %s table size\n", Signature);
        return (NULL);
    }

    /* Allocate a new buffer for the table */

    ReturnTable = AcpiOsAllocate (DataSize);
    if (!ReturnTable)
    {
        goto Cleanup;
    }

    /* Get the actual table from the registry */

    Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL,
                (UCHAR *) ReturnTable, &DataSize);
    if (Status != ERROR_SUCCESS)
    {
        AcpiOsPrintf ("Could not read %s data\n", Signature);
        AcpiOsFree (ReturnTable);
        return (NULL);
    }

Cleanup:
    RegCloseKey (Handle);
    return (ReturnTable);
}

static void
aibs_attach_sif(struct aibs_softc *sc, enum aibs_type st)
{
	ACPI_STATUS		s;
	ACPI_BUFFER		b;
	ACPI_OBJECT		*bp, *o;
	int			i, n;
	const char		*node;
	char			name[] = "?SIF";
	struct aibs_sensor	*as;
	struct sysctl_oid	*so;

	switch (st) {
	case AIBS_VOLT:
		node = "volt";
		name[0] = 'V';
		break;
	case AIBS_TEMP:
		node = "temp";
		name[0] = 'T';
		break;
	case AIBS_FAN:
		node = "fan";
		name[0] = 'F';
		break;
	default:
		return;
	}

	b.Length = ACPI_ALLOCATE_BUFFER;
	s = AcpiEvaluateObjectTyped(sc->sc_ah, name, NULL, &b,
	    ACPI_TYPE_PACKAGE);
	if (ACPI_FAILURE(s)) {
		device_printf(sc->sc_dev, "%s not found\n", name);
		return;
	}

	bp = b.Pointer;
	o = bp->Package.Elements;
	if (o[0].Type != ACPI_TYPE_INTEGER) {
		device_printf(sc->sc_dev, "%s[0]: invalid type\n", name);
		AcpiOsFree(b.Pointer);
		return;
	}

	n = o[0].Integer.Value;
	if (bp->Package.Count - 1 < n) {
		device_printf(sc->sc_dev, "%s: invalid package\n", name);
		AcpiOsFree(b.Pointer);
		return;
	} else if (bp->Package.Count - 1 > n) {
		int on = n;

#ifdef AIBS_MORE_SENSORS
		n = bp->Package.Count - 1;
#endif
		device_printf(sc->sc_dev, "%s: malformed package: %i/%i"
		    ", assume %i\n", name, on, bp->Package.Count - 1, n);
	}
	if (n < 1) {
		device_printf(sc->sc_dev, "%s: no members in the package\n",
		    name);
		AcpiOsFree(b.Pointer);
		return;
	}

	as = malloc(sizeof(*as) * n, M_DEVBUF, M_NOWAIT | M_ZERO);
	if (as == NULL) {
		device_printf(sc->sc_dev, "%s: malloc fail\n", name);
		AcpiOsFree(b.Pointer);
		return;
	}
	switch (st) {
	case AIBS_VOLT:
		sc->sc_asens_volt = as;
		break;
	case AIBS_TEMP:
		sc->sc_asens_temp = as;
		break;
	case AIBS_FAN:
		sc->sc_asens_fan = as;
		break;
	}

	/* sysctl subtree for sensors of this type */
	so = SYSCTL_ADD_NODE(device_get_sysctl_ctx(sc->sc_dev),
	    SYSCTL_CHILDREN(device_get_sysctl_tree(sc->sc_dev)), st,
	    node, CTLFLAG_RD, NULL, NULL);

	for (i = 0, o++; i < n; i++, o++) {
		ACPI_OBJECT	*oi;
		char		si[3];
		const char	*desc;

		/* acpica5 automatically evaluates the referenced package */
		if (o[0].Type != ACPI_TYPE_PACKAGE) {
			device_printf(sc->sc_dev,
			    "%s: %i: not a package: %i type\n",
			    name, i, o[0].Type);
			continue;
//.........这里部分代码省略.........

static void
acpi_cmbat_get_bst(void *arg)
{
    struct acpi_cmbat_softc *sc;
    ACPI_STATUS	as;
    ACPI_OBJECT	*res;
    ACPI_HANDLE	h;
    ACPI_BUFFER	bst_buffer;
    device_t dev;

    ACPI_SERIAL_ASSERT(cmbat);

    dev = arg;
    sc = device_get_softc(dev);
    h = acpi_get_handle(dev);
    bst_buffer.Pointer = NULL;
    bst_buffer.Length = ACPI_ALLOCATE_BUFFER;

    if (!acpi_cmbat_info_expired(&sc->bst_lastupdated))
	goto end;

    as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer);
    if (ACPI_FAILURE(as)) {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "error fetching current battery status -- %s\n",
		    AcpiFormatException(as));
	goto end;
    }

    res = (ACPI_OBJECT *)bst_buffer.Pointer;
    if (!ACPI_PKG_VALID(res, 4)) {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "battery status corrupted\n");
	goto end;
    }

    if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0)
	goto end;
    if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0)
	goto end;
    if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0)
	goto end;
    if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0)
	goto end;
    acpi_cmbat_info_updated(&sc->bst_lastupdated);

    /* Clear out undefined/extended bits that might be set by hardware. */
    sc->bst.state &= ACPI_BATT_STAT_BST_MASK;
    if ((sc->bst.state & ACPI_BATT_STAT_INVALID) == ACPI_BATT_STAT_INVALID)
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
	    "battery reports simultaneous charging and discharging\n");

    /* XXX If all batteries are critical, perhaps we should suspend. */
    if (sc->bst.state & ACPI_BATT_STAT_CRITICAL) {
    	if ((sc->flags & ACPI_BATT_STAT_CRITICAL) == 0) {
	    sc->flags |= ACPI_BATT_STAT_CRITICAL;
	    device_printf(dev, "critically low charge!\n");
	}
    } else
	sc->flags &= ~ACPI_BATT_STAT_CRITICAL;

end:
    if (bst_buffer.Pointer != NULL)
	AcpiOsFree(bst_buffer.Pointer);
}

static void
acpi_cmbat_get_bif(void *arg)
{
    struct acpi_cmbat_softc *sc;
    ACPI_STATUS	as;
    ACPI_OBJECT	*res;
    ACPI_HANDLE	h;
    ACPI_BUFFER	bif_buffer;
    device_t dev;

    ACPI_SERIAL_ASSERT(cmbat);

    dev = arg;
    sc = device_get_softc(dev);
    h = acpi_get_handle(dev);
    bif_buffer.Pointer = NULL;
    bif_buffer.Length = ACPI_ALLOCATE_BUFFER;

    as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer);
    if (ACPI_FAILURE(as)) {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "error fetching current battery info -- %s\n",
		    AcpiFormatException(as));
	goto end;
    }

    res = (ACPI_OBJECT *)bif_buffer.Pointer;
    if (!ACPI_PKG_VALID(res, 13)) {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "battery info corrupted\n");
	goto end;
    }

    if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0)
	goto end;
    if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0)
	goto end;
    if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0)
	goto end;
    if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0)
	goto end;
    if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0)
	goto end;
    if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0)
	goto end;
    if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0)
	goto end;
    if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0)
	goto end;
    if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0)
	goto end;
    if (acpi_PkgStr(res,  9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0)
	goto end;
    if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0)
	goto end;
    if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0)
	goto end;
    if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0)
	goto end;

end:
    if (bif_buffer.Pointer != NULL)
	AcpiOsFree(bif_buffer.Pointer);
}