C++ ACPI_ROUND_UP_TO_NATIVE_WORD函數代碼示例

static u32
acpi_rs_stream_option_length(u32 resource_length,
			     u32 minimum_aml_resource_length)
{
	u32 string_length = 0;

	ACPI_FUNCTION_ENTRY();

	/*
	 * The resource_source_index and resource_source are optional elements of some
	 * Large-type resource descriptors.
	 */

	/*
	 * If the length of the actual resource descriptor is greater than the ACPI
	 * spec-defined minimum length, it means that a resource_source_index exists
	 * and is followed by a (required) null terminated string. The string length
	 * (including the null terminator) is the resource length minus the minimum
	 * length, minus one byte for the resource_source_index itself.
	 */
	if (resource_length > minimum_aml_resource_length) {

		/* Compute the length of the optional string */

		string_length =
		    resource_length - minimum_aml_resource_length - 1;
	}

	/*
	 * Round the length up to a multiple of the native word in order to
	 * guarantee that the entire resource descriptor is native word aligned
	 */
	return ((u32) ACPI_ROUND_UP_TO_NATIVE_WORD(string_length));
}

static acpi_status
acpi_ut_get_package_object_size(union acpi_operand_object *internal_object,
				acpi_size * obj_length)
{
	acpi_status status;
	struct acpi_pkg_info info;

	ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object);

	info.length = 0;
	info.object_space = 0;
	info.num_packages = 1;

	status = acpi_ut_walk_package_tree(internal_object, NULL,
					   acpi_ut_get_element_length, &info);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * We have handled all of the objects in all levels of the package.
	 * just add the length of the package objects themselves.
	 * Round up to the next machine word.
	 */
	info.length += ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) *
	    (acpi_size) info.num_packages;

	/* Return the total package length */

	*obj_length = info.length;
	return_ACPI_STATUS(status);
}

static acpi_status
acpi_ut_copy_ipackage_to_epackage (
	union acpi_operand_object       *internal_object,
	u8                              *buffer,
	acpi_size                       *space_used)
{
	union acpi_object               *external_object;
	acpi_status                     status;
	struct acpi_pkg_info            info;


	ACPI_FUNCTION_TRACE ("ut_copy_ipackage_to_epackage");


	/*
	 * First package at head of the buffer
	 */
	external_object = ACPI_CAST_PTR (union acpi_object, buffer);

	/*
	 * Free space begins right after the first package
	 */
	info.length      = ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object));
	info.free_space  = buffer + ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object));
	info.object_space = 0;
	info.num_packages = 1;

	external_object->type            = ACPI_GET_OBJECT_TYPE (internal_object);
	external_object->package.count   = internal_object->package.count;
	external_object->package.elements = ACPI_CAST_PTR (union acpi_object, info.free_space);

	/*
	 * Leave room for an array of ACPI_OBJECTS in the buffer
	 * and move the free space past it
	 */
	info.length    += (acpi_size) external_object->package.count *
			 ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object));
	info.free_space += external_object->package.count *
			 ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object));

	status = acpi_ut_walk_package_tree (internal_object, external_object,
			 acpi_ut_copy_ielement_to_eelement, &info);

	*space_used = info.length;
	return_ACPI_STATUS (status);
}

acpi_status
acpi_ut_copy_iobject_to_eobject(union acpi_operand_object *internal_object,
                                struct acpi_buffer *ret_buffer)
{
    acpi_status status;

    ACPI_FUNCTION_TRACE(ut_copy_iobject_to_eobject);

    if (ACPI_GET_OBJECT_TYPE(internal_object) == ACPI_TYPE_PACKAGE) {
        /*
         * Package object:  Copy all subobjects (including
         * nested packages)
         */
        status = acpi_ut_copy_ipackage_to_epackage(internal_object,
                 ret_buffer->pointer,
                 &ret_buffer->length);
    } else {
        /*
         * Build a simple object (no nested objects)
         */
        status = acpi_ut_copy_isimple_to_esimple(internal_object,
                 ACPI_CAST_PTR(union
                               acpi_object,
                               ret_buffer->
                               pointer),
                 ACPI_ADD_PTR(u8,
                              ret_buffer->
                              pointer,
                              ACPI_ROUND_UP_TO_NATIVE_WORD
                              (sizeof
                               (union
                                acpi_object))),
                 &ret_buffer->length);
        /*
         * build simple does not include the object size in the length
         * so we add it in here
         */
        ret_buffer->length += sizeof(union acpi_object);
    }

    return_ACPI_STATUS(status);
}

static UINT32
AcpiRsStreamOptionLength (
    UINT32                  ResourceLength,
    UINT32                  MinimumAmlResourceLength)
{
    UINT32                  StringLength = 0;


    ACPI_FUNCTION_ENTRY ();


    /*
     * The ResourceSourceIndex and ResourceSource are optional elements of some
     * Large-type resource descriptors.
     */

    /*
     * If the length of the actual resource descriptor is greater than the ACPI
     * spec-defined minimum length, it means that a ResourceSourceIndex exists
     * and is followed by a (required) null terminated string. The string length
     * (including the null terminator) is the resource length minus the minimum
     * length, minus one byte for the ResourceSourceIndex itself.
     */
    if (ResourceLength > MinimumAmlResourceLength)
    {
        /* Compute the length of the optional string */

        StringLength = ResourceLength - MinimumAmlResourceLength - 1;
    }

    /*
     * Round the length up to a multiple of the native word in order to
     * guarantee that the entire resource descriptor is native word aligned
     */
    return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength));
}

static ACPI_STATUS
AcpiUtGetPackageObjectSize (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_SIZE               *ObjLength)
{
    ACPI_STATUS             Status;
    ACPI_PKG_INFO           Info;


    ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);


    Info.Length = 0;
    Info.ObjectSpace = 0;
    Info.NumPackages = 1;

    Status = AcpiUtWalkPackageTree (
        InternalObject, NULL, AcpiUtGetElementLength, &Info);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * We have handled all of the objects in all levels of the package.
     * just add the length of the package objects themselves.
     * Round up to the next machine word.
     */
    Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (
        sizeof (ACPI_OBJECT)) * (ACPI_SIZE) Info.NumPackages;

    /* Return the total package length */

    *ObjLength = Info.Length;
    return_ACPI_STATUS (Status);
}

static ACPI_STATUS
AcpiUtGetSimpleObjectSize (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_SIZE               *ObjLength)
{
    ACPI_SIZE               Length;
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);


    /*
     * Handle a null object (Could be a uninitialized package
     * element -- which is legal)
     */
    if (!InternalObject)
    {
        *ObjLength = 0;
        return_ACPI_STATUS (AE_OK);
    }

    /* Start with the length of the Acpi object */

    Length = sizeof (ACPI_OBJECT);

    if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
    {
        /* Object is a named object (reference), just return the length */

        *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
        return_ACPI_STATUS (Status);
    }

    /*
     * The final length depends on the object type
     * Strings and Buffers are packed right up against the parent object and
     * must be accessed bytewise or there may be alignment problems on
     * certain processors
     */
    switch (ACPI_GET_OBJECT_TYPE (InternalObject))
    {
    case ACPI_TYPE_STRING:

        Length += (ACPI_SIZE) InternalObject->String.Length + 1;
        break;


    case ACPI_TYPE_BUFFER:

        Length += (ACPI_SIZE) InternalObject->Buffer.Length;
        break;


    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_PROCESSOR:
    case ACPI_TYPE_POWER:

        /*
         * No extra data for these types
         */
        break;


    case ACPI_TYPE_LOCAL_REFERENCE:

        switch (InternalObject->Reference.Opcode)
        {
        case AML_INT_NAMEPATH_OP:

            /*
             * Get the actual length of the full pathname to this object.
             * The reference will be converted to the pathname to the object
             */
            Length += ACPI_ROUND_UP_TO_NATIVE_WORD (
                        AcpiNsGetPathnameLength (InternalObject->Reference.Node));
            break;

        default:

            /*
             * No other reference opcodes are supported.
             * Notably, Locals and Args are not supported, but this may be
             * required eventually.
             */
            ACPI_ERROR ((AE_INFO,
                "Unsupported Reference opcode=%X in object %p",
                InternalObject->Reference.Opcode, InternalObject));
            Status = AE_TYPE;
            break;
        }
        break;


    default:

        ACPI_ERROR ((AE_INFO, "Unsupported type=%X in object %p",
            ACPI_GET_OBJECT_TYPE (InternalObject), InternalObject));
        Status = AE_TYPE;
        break;
//.........這裏部分代碼省略.........

static acpi_status
acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
			       acpi_size * obj_length)
{
	acpi_size length;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);

	/*
	 * Handle a null object (Could be a uninitialized package
	 * element -- which is legal)
	 */
	if (!internal_object) {
		*obj_length = sizeof(union acpi_object);
		return_ACPI_STATUS(AE_OK);
	}

	/* Start with the length of the Acpi object */

	length = sizeof(union acpi_object);

	if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {

		/* Object is a named object (reference), just return the length */

		*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
		return_ACPI_STATUS(status);
	}

	/*
	 * The final length depends on the object type
	 * Strings and Buffers are packed right up against the parent object and
	 * must be accessed bytewise or there may be alignment problems on
	 * certain processors
	 */
	switch (ACPI_GET_OBJECT_TYPE(internal_object)) {
	case ACPI_TYPE_STRING:

		length += (acpi_size) internal_object->string.length + 1;
		break;

	case ACPI_TYPE_BUFFER:

		length += (acpi_size) internal_object->buffer.length;
		break;

	case ACPI_TYPE_INTEGER:
	case ACPI_TYPE_PROCESSOR:
	case ACPI_TYPE_POWER:

		/* No extra data for these types */

		break;

	case ACPI_TYPE_LOCAL_REFERENCE:

		switch (internal_object->reference.opcode) {
		case AML_INT_NAMEPATH_OP:

			/*
			 * Get the actual length of the full pathname to this object.
			 * The reference will be converted to the pathname to the object
			 */
			length +=
			    ACPI_ROUND_UP_TO_NATIVE_WORD
			    (acpi_ns_get_pathname_length
			     (internal_object->reference.node));
			break;

		default:

			/*
			 * No other reference opcodes are supported.
			 * Notably, Locals and Args are not supported, but this may be
			 * required eventually.
			 */
			ACPI_ERROR((AE_INFO,
				    "Unsupported Reference opcode=%X in object %p",
				    internal_object->reference.opcode,
				    internal_object));
			status = AE_TYPE;
			break;
		}
		break;

	default:

		ACPI_ERROR((AE_INFO, "Unsupported type=%X in object %p",
			    ACPI_GET_OBJECT_TYPE(internal_object),
			    internal_object));
		status = AE_TYPE;
		break;
	}

	/*
	 * Account for the space required by the object rounded up to the next
	 * multiple of the machine word size.  This keeps each object aligned
	 * on a machine word boundary. (preventing alignment faults on some
	 * machines.)
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
        case ACPI_RESOURCE_NAME_END_TAG:
            /*
             * End Tag: This is the normal exit
             */
            return_ACPI_STATUS (AE_OK);


        case ACPI_RESOURCE_NAME_ADDRESS32:
        case ACPI_RESOURCE_NAME_ADDRESS16:
        case ACPI_RESOURCE_NAME_ADDRESS64:
            /*
             * Address Resource:
             * Add the size of the optional ResourceSource
             */
            ExtraStructBytes = AcpiRsStreamOptionLength (
                ResourceLength, MinimumAmlResourceLength);
            break;


        case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
            /*
             * Extended IRQ Resource:
             * Using the InterruptTableLength, add 4 bytes for each additional
             * interrupt. Note: at least one interrupt is required and is
             * included in the minimum descriptor size (reason for the -1)
             */
            ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32);

            /* Add the size of the optional ResourceSource */

            ExtraStructBytes += AcpiRsStreamOptionLength (
                ResourceLength - ExtraStructBytes, MinimumAmlResourceLength);
            break;

        case ACPI_RESOURCE_NAME_GPIO:

            /* Vendor data is optional */

            if (AmlResource->Gpio.VendorLength)
            {
                ExtraStructBytes += AmlResource->Gpio.VendorOffset -
                    AmlResource->Gpio.PinTableOffset + AmlResource->Gpio.VendorLength;
            }
            else
            {
                ExtraStructBytes += AmlResource->LargeHeader.ResourceLength +
                    sizeof (AML_RESOURCE_LARGE_HEADER) -
                    AmlResource->Gpio.PinTableOffset;
            }
            break;

        case ACPI_RESOURCE_NAME_SERIAL_BUS:

            MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[
                AmlResource->CommonSerialBus.Type];
            ExtraStructBytes += AmlResource->CommonSerialBus.ResourceLength -
                MinimumAmlResourceLength;
            break;

        default:

            break;
        }

        /*
         * Update the required buffer size for the internal descriptor structs
         *
         * Important: Round the size up for the appropriate alignment. This
         * is a requirement on IA64.
         */
        if (AcpiUtGetResourceType (AmlBuffer) == ACPI_RESOURCE_NAME_SERIAL_BUS)
        {
            BufferSize = AcpiGbl_ResourceStructSerialBusSizes[
                AmlResource->CommonSerialBus.Type] + ExtraStructBytes;
        }
        else
        {
            BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] +
                        ExtraStructBytes;
        }
        BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize);

        *SizeNeeded += BufferSize;

        ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
            "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
            AcpiUtGetResourceType (AmlBuffer),
            AcpiUtGetDescriptorLength (AmlBuffer), BufferSize));

        /*
         * Point to the next resource within the AML stream using the length
         * contained in the resource descriptor header
         */
        AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer);
    }

    /* Did not find an EndTag resource descriptor */

    return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}

//.........這裏部分代碼省略.........
		buffer =
		    aml_buffer + acpi_ut_get_resource_header_length(aml_buffer);

		switch (acpi_ut_get_resource_type(aml_buffer)) {
		case ACPI_RESOURCE_NAME_IRQ:
			/*
			 * IRQ Resource:
			 * Get the number of bits set in the 16-bit IRQ mask
			 */
			ACPI_MOVE_16_TO_16(&temp16, buffer);
			extra_struct_bytes = acpi_rs_count_set_bits(temp16);
			break;

		case ACPI_RESOURCE_NAME_DMA:
			/*
			 * DMA Resource:
			 * Get the number of bits set in the 8-bit DMA mask
			 */
			extra_struct_bytes = acpi_rs_count_set_bits(*buffer);
			break;

		case ACPI_RESOURCE_NAME_VENDOR_SMALL:
		case ACPI_RESOURCE_NAME_VENDOR_LARGE:
			/*
			 * Vendor Resource:
			 * Get the number of vendor data bytes
			 */
			extra_struct_bytes = resource_length;
			break;

		case ACPI_RESOURCE_NAME_END_TAG:
			/*
			 * End Tag:
			 * This is the normal exit, add size of end_tag
			 */
			*size_needed += ACPI_RS_SIZE_MIN;
			return_ACPI_STATUS(AE_OK);

		case ACPI_RESOURCE_NAME_ADDRESS32:
		case ACPI_RESOURCE_NAME_ADDRESS16:
		case ACPI_RESOURCE_NAME_ADDRESS64:
			/*
			 * Address Resource:
			 * Add the size of the optional resource_source
			 */
			extra_struct_bytes =
			    acpi_rs_stream_option_length(resource_length,
							 minimum_aml_resource_length);
			break;

		case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
			/*
			 * Extended IRQ Resource:
			 * Using the interrupt_table_length, add 4 bytes for each additional
			 * interrupt. Note: at least one interrupt is required and is
			 * included in the minimum descriptor size (reason for the -1)
			 */
			extra_struct_bytes = (buffer[1] - 1) * sizeof(u32);

			/* Add the size of the optional resource_source */

			extra_struct_bytes +=
			    acpi_rs_stream_option_length(resource_length -
							 extra_struct_bytes,
							 minimum_aml_resource_length);
			break;

		default:
			break;
		}

		/*
		 * Update the required buffer size for the internal descriptor structs
		 *
		 * Important: Round the size up for the appropriate alignment. This
		 * is a requirement on IA64.
		 */
		buffer_size = acpi_gbl_resource_struct_sizes[resource_index] +
		    extra_struct_bytes;
		buffer_size = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(buffer_size);

		*size_needed += buffer_size;

		ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
				  "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
				  acpi_ut_get_resource_type(aml_buffer),
				  acpi_ut_get_descriptor_length(aml_buffer),
				  buffer_size));

		/*
		 * Point to the next resource within the AML stream using the length
		 * contained in the resource descriptor header
		 */
		aml_buffer += acpi_ut_get_descriptor_length(aml_buffer);
	}

	/* Did not find an end_tag resource descriptor */

	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}

             * pointer to the end of the current ResourceSource structure.
             */
            ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
                sizeof (ACPI_RESOURCE_SOURCE));
        }

        /*
         * In order for the Resource length to be a multiple of the native
         * word, calculate the length of the string (+1 for NULL terminator)
         * and expand to the next word multiple.
         *
         * Zero the entire area of the buffer.
         */
        TotalLength = (UINT32) ACPI_STRLEN (
            ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
        TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);

        ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);

        /* Copy the ResourceSource string to the destination */

        ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
            ACPI_CAST_PTR (char, &AmlResourceSource[1]));

        return ((ACPI_RS_LENGTH) TotalLength);
    }

    /* ResourceSource is not present */

    ResourceSource->Index = 0;
    ResourceSource->StringLength = 0;

static acpi_status
acpi_ut_copy_isimple_to_esimple (
	union acpi_operand_object       *internal_object,
	union acpi_object               *external_object,
	u8                              *data_space,
	acpi_size                       *buffer_space_used)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ut_copy_isimple_to_esimple");


	*buffer_space_used = 0;

	/*
	 * Check for NULL object case (could be an uninitialized
	 * package element)
	 */
	if (!internal_object) {
		return_ACPI_STATUS (AE_OK);
	}

	/* Always clear the external object */

	ACPI_MEMSET (external_object, 0, sizeof (union acpi_object));

	/*
	 * In general, the external object will be the same type as
	 * the internal object
	 */
	external_object->type = ACPI_GET_OBJECT_TYPE (internal_object);

	/* However, only a limited number of external types are supported */

	switch (ACPI_GET_OBJECT_TYPE (internal_object)) {
	case ACPI_TYPE_STRING:

		external_object->string.pointer = (char *) data_space;
		external_object->string.length = internal_object->string.length;
		*buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD ((acpi_size) internal_object->string.length + 1);

		ACPI_MEMCPY ((void *) data_space, (void *) internal_object->string.pointer,
				 (acpi_size) internal_object->string.length + 1);
		break;


	case ACPI_TYPE_BUFFER:

		external_object->buffer.pointer = data_space;
		external_object->buffer.length = internal_object->buffer.length;
		*buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD (internal_object->string.length);

		ACPI_MEMCPY ((void *) data_space, (void *) internal_object->buffer.pointer,
				 internal_object->buffer.length);
		break;


	case ACPI_TYPE_INTEGER:

		external_object->integer.value = internal_object->integer.value;
		break;


	case ACPI_TYPE_LOCAL_REFERENCE:

		/*
		 * This is an object reference.  Attempt to dereference it.
		 */
		switch (internal_object->reference.opcode) {
		case AML_INT_NAMEPATH_OP:

			/* For namepath, return the object handle ("reference") */

		default:
			/*
			 * Use the object type of "Any" to indicate a reference
			 * to object containing a handle to an ACPI named object.
			 */
			external_object->type = ACPI_TYPE_ANY;
			external_object->reference.handle = internal_object->reference.node;
			break;
		}
		break;


	case ACPI_TYPE_PROCESSOR:

		external_object->processor.proc_id    = internal_object->processor.proc_id;
		external_object->processor.pblk_address = internal_object->processor.address;
		external_object->processor.pblk_length = internal_object->processor.length;
		break;


	case ACPI_TYPE_POWER:

		external_object->power_resource.system_level =
				   internal_object->power_resource.system_level;

		external_object->power_resource.resource_order =
//.........這裏部分代碼省略.........

static ACPI_STATUS
AcpiUtCopyIsimpleToEsimple (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_OBJECT             *ExternalObject,
    UINT8                   *DataSpace,
    ACPI_SIZE               *BufferSpaceUsed)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (UtCopyIsimpleToEsimple);


    *BufferSpaceUsed = 0;

    /*
     * Check for NULL object case (could be an uninitialized
     * package element)
     */
    if (!InternalObject)
    {
        return_ACPI_STATUS (AE_OK);
    }

    /* Always clear the external object */

    ACPI_MEMSET (ExternalObject, 0, sizeof (ACPI_OBJECT));

    /*
     * In general, the external object will be the same type as
     * the internal object
     */
    ExternalObject->Type = ACPI_GET_OBJECT_TYPE (InternalObject);

    /* However, only a limited number of external types are supported */

    switch (ACPI_GET_OBJECT_TYPE (InternalObject))
    {
    case ACPI_TYPE_STRING:

        ExternalObject->String.Pointer = (char *) DataSpace;
        ExternalObject->String.Length  = InternalObject->String.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
                            (ACPI_SIZE) InternalObject->String.Length + 1);

        ACPI_MEMCPY ((void *) DataSpace,
            (void *) InternalObject->String.Pointer,
            (ACPI_SIZE) InternalObject->String.Length + 1);
        break;


    case ACPI_TYPE_BUFFER:

        ExternalObject->Buffer.Pointer = DataSpace;
        ExternalObject->Buffer.Length  = InternalObject->Buffer.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
                            InternalObject->String.Length);

        ACPI_MEMCPY ((void *) DataSpace,
            (void *) InternalObject->Buffer.Pointer,
            InternalObject->Buffer.Length);
        break;


    case ACPI_TYPE_INTEGER:

        ExternalObject->Integer.Value = InternalObject->Integer.Value;
        break;


    case ACPI_TYPE_LOCAL_REFERENCE:

        /*
         * This is an object reference.  Attempt to dereference it.
         */
        switch (InternalObject->Reference.Opcode)
        {
        case AML_INT_NAMEPATH_OP:

            /* For namepath, return the object handle ("reference") */

        default:
            /*
             * Use the object type of "Any" to indicate a reference
             * to object containing a handle to an ACPI named object.
             */
            ExternalObject->Type = ACPI_TYPE_ANY;
            ExternalObject->Reference.Handle = InternalObject->Reference.Node;
            break;
        }
        break;


    case ACPI_TYPE_PROCESSOR:

        ExternalObject->Processor.ProcId      = InternalObject->Processor.ProcId;
        ExternalObject->Processor.PblkAddress = InternalObject->Processor.Address;
        ExternalObject->Processor.PblkLength  = InternalObject->Processor.Length;
        break;

//.........這裏部分代碼省略.........

			 */
			resource_source->string_ptr =
			    ACPI_ADD_PTR(char, resource_source,
					 sizeof(struct acpi_resource_source));
		}

		/*
		 * In order for the Resource length to be a multiple of the native
		 * word, calculate the length of the string (+1 for NULL terminator)
		 * and expand to the next word multiple.
		 *
		 * Zero the entire area of the buffer.
		 */
		total_length = (u32)
		ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + 1;
		total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);

		ACPI_MEMSET(resource_source->string_ptr, 0, total_length);

		/* Copy the resource_source string to the destination */

		resource_source->string_length =
		    acpi_rs_strcpy(resource_source->string_ptr,
				   ACPI_CAST_PTR(char,
						 &aml_resource_source[1]));

		return ((acpi_rs_length) total_length);
	}

	/* resource_source is not present */

static acpi_status
acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
			       acpi_size * obj_length)
{
	acpi_size length;
	acpi_size size;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);

	/* Start with the length of the (external) Acpi object */

	length = sizeof(union acpi_object);

	/* A NULL object is allowed, can be a legal uninitialized package element */

	if (!internal_object) {
	/*
		 * Object is NULL, just return the length of union acpi_object
		 * (A NULL union acpi_object is an object of all zeroes.)
	 */
		*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
		return_ACPI_STATUS(AE_OK);
	}

	/* A Namespace Node should never appear here */

	if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {

		/* A namespace node should never get here */

		return_ACPI_STATUS(AE_AML_INTERNAL);
	}

	/*
	 * The final length depends on the object type
	 * Strings and Buffers are packed right up against the parent object and
	 * must be accessed bytewise or there may be alignment problems on
	 * certain processors
	 */
	switch (internal_object->common.type) {
	case ACPI_TYPE_STRING:

		length += (acpi_size) internal_object->string.length + 1;
		break;

	case ACPI_TYPE_BUFFER:

		length += (acpi_size) internal_object->buffer.length;
		break;

	case ACPI_TYPE_INTEGER:
	case ACPI_TYPE_PROCESSOR:
	case ACPI_TYPE_POWER:

		/* No extra data for these types */

		break;

	case ACPI_TYPE_LOCAL_REFERENCE:

		switch (internal_object->reference.class) {
		case ACPI_REFCLASS_NAME:
			/*
			 * Get the actual length of the full pathname to this object.
			 * The reference will be converted to the pathname to the object
			 */
			size =
			    acpi_ns_get_pathname_length(internal_object->
							reference.node);
			if (!size) {
				return_ACPI_STATUS(AE_BAD_PARAMETER);
			}

			length += ACPI_ROUND_UP_TO_NATIVE_WORD(size);
			break;

		default:
			/*
			 * No other reference opcodes are supported.
			 * Notably, Locals and Args are not supported, but this may be
			 * required eventually.
			 */
			ACPI_ERROR((AE_INFO,
				    "Cannot convert to external object - "
				    "unsupported Reference Class [%s] 0x%X in object %p",
				    acpi_ut_get_reference_name(internal_object),
				    internal_object->reference.class,
				    internal_object));
			status = AE_TYPE;
			break;
		}
		break;

	default:

		ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
			    "unsupported type [%s] 0x%X in object %p",
			    acpi_ut_get_object_type_name(internal_object),
			    internal_object->common.type, internal_object));
//.........這裏部分代碼省略.........