Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 841 insertions, 0 deletions

diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
new file mode 100644
index 000000000000..8a5f0a52371d
--- /dev/null
+++ b/drivers/acpi/resources/rscalc.c
@@ -0,0 +1,841 @@
+/*******************************************************************************
+ *
+ * Module Name: rscalc - Calculate stream and list lengths
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acresrc.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_RESOURCES
+	 ACPI_MODULE_NAME    ("rscalc")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_byte_stream_length
+ *
+ * PARAMETERS:  linked_list         - Pointer to the resource linked list
+ *              size_needed         - u32 pointer of the size buffer needed
+ *                                    to properly return the parsed data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Takes the resource byte stream and parses it once, calculating
+ *              the size buffer needed to hold the linked list that conveys
+ *              the resource data.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_byte_stream_length (
+	struct acpi_resource            *linked_list,
+	acpi_size                       *size_needed)
+{
+	acpi_size                       byte_stream_size_needed = 0;
+	acpi_size                       segment_size;
+	u8                              done = FALSE;
+
+
+	ACPI_FUNCTION_TRACE ("rs_get_byte_stream_length");
+
+
+	while (!done) {
+		/*
+		 * Init the variable that will hold the size to add to the total.
+		 */
+		segment_size = 0;
+
+		switch (linked_list->id) {
+		case ACPI_RSTYPE_IRQ:
+			/*
+			 * IRQ Resource
+			 * For an IRQ Resource, Byte 3, although optional, will always be
+			 * created - it holds IRQ information.
+			 */
+			segment_size = 4;
+			break;
+
+		case ACPI_RSTYPE_DMA:
+			/*
+			 * DMA Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 3;
+			break;
+
+		case ACPI_RSTYPE_START_DPF:
+			/*
+			 * Start Dependent Functions Resource
+			 * For a start_dependent_functions Resource, Byte 1, although
+			 * optional, will always be created.
+			 */
+			segment_size = 2;
+			break;
+
+		case ACPI_RSTYPE_END_DPF:
+			/*
+			 * End Dependent Functions Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 1;
+			break;
+
+		case ACPI_RSTYPE_IO:
+			/*
+			 * IO Port Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 8;
+			break;
+
+		case ACPI_RSTYPE_FIXED_IO:
+			/*
+			 * Fixed IO Port Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 4;
+			break;
+
+		case ACPI_RSTYPE_VENDOR:
+			/*
+			 * Vendor Defined Resource
+			 * For a Vendor Specific resource, if the Length is between 1 and 7
+			 * it will be created as a Small Resource data type, otherwise it
+			 * is a Large Resource data type.
+			 */
+			if (linked_list->data.vendor_specific.length > 7) {
+				segment_size = 3;
+			}
+			else {
+				segment_size = 1;
+			}
+			segment_size += linked_list->data.vendor_specific.length;
+			break;
+
+		case ACPI_RSTYPE_END_TAG:
+			/*
+			 * End Tag
+			 * For this resource the size is static
+			 */
+			segment_size = 2;
+			done = TRUE;
+			break;
+
+		case ACPI_RSTYPE_MEM24:
+			/*
+			 * 24-Bit Memory Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 12;
+			break;
+
+		case ACPI_RSTYPE_MEM32:
+			/*
+			 * 32-Bit Memory Range Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 20;
+			break;
+
+		case ACPI_RSTYPE_FIXED_MEM32:
+			/*
+			 * 32-Bit Fixed Memory Resource
+			 * For this resource the size is static
+			 */
+			segment_size = 12;
+			break;
+
+		case ACPI_RSTYPE_ADDRESS16:
+			/*
+			 * 16-Bit Address Resource
+			 * The base size of this byte stream is 16. If a Resource Source
+			 * string is not NULL, add 1 for the Index + the length of the null
+			 * terminated string Resource Source + 1 for the null.
+			 */
+			segment_size = 16;
+
+			if (linked_list->data.address16.resource_source.string_ptr) {
+				segment_size += linked_list->data.address16.resource_source.string_length;
+				segment_size++;
+			}
+			break;
+
+		case ACPI_RSTYPE_ADDRESS32:
+			/*
+			 * 32-Bit Address Resource
+			 * The base size of this byte stream is 26. If a Resource
+			 * Source string is not NULL, add 1 for the Index + the
+			 * length of the null terminated string Resource Source +
+			 * 1 for the null.
+			 */
+			segment_size = 26;
+
+			if (linked_list->data.address32.resource_source.string_ptr) {
+				segment_size += linked_list->data.address32.resource_source.string_length;
+				segment_size++;
+			}
+			break;
+
+		case ACPI_RSTYPE_ADDRESS64:
+			/*
+			 * 64-Bit Address Resource
+			 * The base size of this byte stream is 46. If a resource_source
+			 * string is not NULL, add 1 for the Index + the length of the null
+			 * terminated string Resource Source + 1 for the null.
+			 */
+			segment_size = 46;
+
+			if (linked_list->data.address64.resource_source.string_ptr) {
+				segment_size += linked_list->data.address64.resource_source.string_length;
+				segment_size++;
+			}
+			break;
+
+		case ACPI_RSTYPE_EXT_IRQ:
+			/*
+			 * Extended IRQ Resource
+			 * The base size of this byte stream is 9. This is for an Interrupt
+			 * table length of 1.  For each additional interrupt, add 4.
+			 * If a Resource Source string is not NULL, add 1 for the
+			 * Index + the length of the null terminated string
+			 * Resource Source + 1 for the null.
+			 */
+			segment_size = 9 +
+				(((acpi_size) linked_list->data.extended_irq.number_of_interrupts - 1) * 4);
+
+			if (linked_list->data.extended_irq.resource_source.string_ptr) {
+				segment_size += linked_list->data.extended_irq.resource_source.string_length;
+				segment_size++;
+			}
+			break;
+
+		default:
+			/*
+			 * If we get here, everything is out of sync, exit with error
+			 */
+			return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
+
+		} /* switch (linked_list->Id) */
+
+		/*
+		 * Update the total
+		 */
+		byte_stream_size_needed += segment_size;
+
+		/*
+		 * Point to the next object
+		 */
+		linked_list = ACPI_PTR_ADD (struct acpi_resource,
+				  linked_list, linked_list->length);
+	}
+
+	/*
+	 * This is the data the caller needs
+	 */
+	*size_needed = byte_stream_size_needed;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_list_length
+ *
+ * PARAMETERS:  byte_stream_buffer      - Pointer to the resource byte stream
+ *              byte_stream_buffer_length - Size of byte_stream_buffer
+ *              size_needed             - u32 pointer of the size buffer
+ *                                        needed to properly return the
+ *                                        parsed data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Takes the resource byte stream and parses it once, calculating
+ *              the size buffer needed to hold the linked list that conveys
+ *              the resource data.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_list_length (
+	u8                              *byte_stream_buffer,
+	u32                             byte_stream_buffer_length,
+	acpi_size                       *size_needed)
+{
+	u32                             buffer_size = 0;
+	u32                             bytes_parsed = 0;
+	u8                              number_of_interrupts = 0;
+	u8                              number_of_channels = 0;
+	u8                              resource_type;
+	u32                             structure_size;
+	u32                             bytes_consumed;
+	u8                              *buffer;
+	u8                              temp8;
+	u16                             temp16;
+	u8                              index;
+	u8                              additional_bytes;
+
+
+	ACPI_FUNCTION_TRACE ("rs_get_list_length");
+
+
+	while (bytes_parsed < byte_stream_buffer_length) {
+		/*
+		 * The next byte in the stream is the resource type
+		 */
+		resource_type = acpi_rs_get_resource_type (*byte_stream_buffer);
+
+		switch (resource_type) {
+		case ACPI_RDESC_TYPE_MEMORY_24:
+			/*
+			 * 24-Bit Memory Resource
+			 */
+			bytes_consumed = 12;
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem24);
+			break;
+
+
+		case ACPI_RDESC_TYPE_LARGE_VENDOR:
+			/*
+			 * Vendor Defined Resource
+			 */
+			buffer = byte_stream_buffer;
+			++buffer;
+
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+			bytes_consumed = temp16 + 3;
+
+			/*
+			 * Ensure a 32-bit boundary for the structure
+			 */
+			temp16 = (u16) ACPI_ROUND_UP_to_32_bITS (temp16);
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor) +
+					   (temp16 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_MEMORY_32:
+			/*
+			 * 32-Bit Memory Range Resource
+			 */
+			bytes_consumed = 20;
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem32);
+			break;
+
+
+		case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
+			/*
+			 * 32-Bit Fixed Memory Resource
+			 */
+			bytes_consumed = 12;
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_mem32);
+			break;
+
+
+		case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
+			/*
+			 * 64-Bit Address Resource
+			 */
+			buffer = byte_stream_buffer;
+
+			++buffer;
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			bytes_consumed = temp16 + 3;
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address64);
+			break;
+
+
+		case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
+			/*
+			 * 64-Bit Address Resource
+			 */
+			buffer = byte_stream_buffer;
+
+			++buffer;
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			bytes_consumed = temp16 + 3;
+
+			/*
+			 * Resource Source Index and Resource Source are optional elements.
+			 * Check the length of the Bytestream.  If it is greater than 43,
+			 * that means that an Index exists and is followed by a null
+			 * terminated string.  Therefore, set the temp variable to the
+			 * length minus the minimum byte stream length plus the byte for
+			 * the Index to determine the size of the NULL terminated string.
+			 */
+			if (43 < temp16) {
+				temp8 = (u8) (temp16 - 44);
+			}
+			else {
+				temp8 = 0;
+			}
+
+			/*
+			 * Ensure a 64-bit boundary for the structure
+			 */
+			temp8 = (u8) ACPI_ROUND_UP_to_64_bITS (temp8);
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address64) +
+					   (temp8 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
+			/*
+			 * 32-Bit Address Resource
+			 */
+			buffer = byte_stream_buffer;
+
+			++buffer;
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			bytes_consumed = temp16 + 3;
+
+			/*
+			 * Resource Source Index and Resource Source are optional elements.
+			 * Check the length of the Bytestream.  If it is greater than 23,
+			 * that means that an Index exists and is followed by a null
+			 * terminated string.  Therefore, set the temp variable to the
+			 * length minus the minimum byte stream length plus the byte for
+			 * the Index to determine the size of the NULL terminated string.
+			 */
+			if (23 < temp16) {
+				temp8 = (u8) (temp16 - 24);
+			}
+			else {
+				temp8 = 0;
+			}
+
+			/*
+			 * Ensure a 32-bit boundary for the structure
+			 */
+			temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address32) +
+					   (temp8 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
+			/*
+			 * 16-Bit Address Resource
+			 */
+			buffer = byte_stream_buffer;
+
+			++buffer;
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			bytes_consumed = temp16 + 3;
+
+			/*
+			 * Resource Source Index and Resource Source are optional elements.
+			 * Check the length of the Bytestream.  If it is greater than 13,
+			 * that means that an Index exists and is followed by a null
+			 * terminated string.  Therefore, set the temp variable to the
+			 * length minus the minimum byte stream length plus the byte for
+			 * the Index to determine the size of the NULL terminated string.
+			 */
+			if (13 < temp16) {
+				temp8 = (u8) (temp16 - 14);
+			}
+			else {
+				temp8 = 0;
+			}
+
+			/*
+			 * Ensure a 32-bit boundary for the structure
+			 */
+			temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address16) +
+					   (temp8 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
+			/*
+			 * Extended IRQ
+			 */
+			buffer = byte_stream_buffer;
+
+			++buffer;
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			bytes_consumed = temp16 + 3;
+
+			/*
+			 * Point past the length field and the Interrupt vector flags to
+			 * save off the Interrupt table length to the Temp8 variable.
+			 */
+			buffer += 3;
+			temp8 = *buffer;
+
+			/*
+			 * To compensate for multiple interrupt numbers, add 4 bytes for
+			 * each additional interrupts greater than 1
+			 */
+			additional_bytes = (u8) ((temp8 - 1) * 4);
+
+			/*
+			 * Resource Source Index and Resource Source are optional elements.
+			 * Check the length of the Bytestream.  If it is greater than 9,
+			 * that means that an Index exists and is followed by a null
+			 * terminated string.  Therefore, set the temp variable to the
+			 * length minus the minimum byte stream length plus the byte for
+			 * the Index to determine the size of the NULL terminated string.
+			 */
+			if (9 + additional_bytes < temp16) {
+				temp8 = (u8) (temp16 - (9 + additional_bytes));
+			}
+			else {
+				temp8 = 0;
+			}
+
+			/*
+			 * Ensure a 32-bit boundary for the structure
+			 */
+			temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_ext_irq) +
+					   (additional_bytes * sizeof (u8)) +
+					   (temp8 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_IRQ_FORMAT:
+			/*
+			 * IRQ Resource.
+			 * Determine if it there are two or three trailing bytes
+			 */
+			buffer = byte_stream_buffer;
+			temp8 = *buffer;
+
+			if(temp8 & 0x01) {
+				bytes_consumed = 4;
+			}
+			else {
+				bytes_consumed = 3;
+			}
+
+			/* Point past the descriptor */
+
+			++buffer;
+
+			/*
+			 * Look at the number of bits set
+			 */
+			ACPI_MOVE_16_TO_16 (&temp16, buffer);
+
+			for (index = 0; index < 16; index++) {
+				if (temp16 & 0x1) {
+					++number_of_interrupts;
+				}
+
+				temp16 >>= 1;
+			}
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io) +
+					   (number_of_interrupts * sizeof (u32));
+			break;
+
+
+		case ACPI_RDESC_TYPE_DMA_FORMAT:
+			/*
+			 * DMA Resource
+			 */
+			buffer = byte_stream_buffer;
+			bytes_consumed = 3;
+
+			/* Point past the descriptor */
+
+			++buffer;
+
+			/*
+			 * Look at the number of bits set
+			 */
+			temp8 = *buffer;
+
+			for(index = 0; index < 8; index++) {
+				if(temp8 & 0x1) {
+					++number_of_channels;
+				}
+
+				temp8 >>= 1;
+			}
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_dma) +
+					   (number_of_channels * sizeof (u32));
+			break;
+
+
+		case ACPI_RDESC_TYPE_START_DEPENDENT:
+			/*
+			 * Start Dependent Functions Resource
+			 * Determine if it there are two or three trailing bytes
+			 */
+			buffer = byte_stream_buffer;
+			temp8 = *buffer;
+
+			if(temp8 & 0x01) {
+				bytes_consumed = 2;
+			}
+			else {
+				bytes_consumed = 1;
+			}
+
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_start_dpf);
+			break;
+
+
+		case ACPI_RDESC_TYPE_END_DEPENDENT:
+			/*
+			 * End Dependent Functions Resource
+			 */
+			bytes_consumed = 1;
+			structure_size = ACPI_RESOURCE_LENGTH;
+			break;
+
+
+		case ACPI_RDESC_TYPE_IO_PORT:
+			/*
+			 * IO Port Resource
+			 */
+			bytes_consumed = 8;
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io);
+			break;
+
+
+		case ACPI_RDESC_TYPE_FIXED_IO_PORT:
+			/*
+			 * Fixed IO Port Resource
+			 */
+			bytes_consumed = 4;
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_io);
+			break;
+
+
+		case ACPI_RDESC_TYPE_SMALL_VENDOR:
+			/*
+			 * Vendor Specific Resource
+			 */
+			buffer = byte_stream_buffer;
+
+			temp8 = *buffer;
+			temp8 = (u8) (temp8 & 0x7);
+			bytes_consumed = temp8 + 1;
+
+			/*
+			 * Ensure a 32-bit boundary for the structure
+			 */
+			temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
+			structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor) +
+					   (temp8 * sizeof (u8));
+			break;
+
+
+		case ACPI_RDESC_TYPE_END_TAG:
+			/*
+			 * End Tag
+			 */
+			bytes_consumed = 2;
+			structure_size = ACPI_RESOURCE_LENGTH;
+			byte_stream_buffer_length = bytes_parsed;
+			break;
+
+
+		default:
+			/*
+			 * If we get here, everything is out of sync,
+			 * exit with an error
+			 */
+			return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
+		}
+
+		/*
+		 * Update the return value and counter
+		 */
+		buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE (structure_size);
+		bytes_parsed += bytes_consumed;
+
+		/*
+		 * Set the byte stream to point to the next resource
+		 */
+		byte_stream_buffer += bytes_consumed;
+	}
+
+	/*
+	 * This is the data the caller needs
+	 */
+	*size_needed = buffer_size;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_rs_get_pci_routing_table_length
+ *
+ * PARAMETERS:  package_object          - Pointer to the package object
+ *              buffer_size_needed      - u32 pointer of the size buffer
+ *                                        needed to properly return the
+ *                                        parsed data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Given a package representing a PCI routing table, this
+ *              calculates the size of the corresponding linked list of
+ *              descriptions.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_pci_routing_table_length (
+	union acpi_operand_object       *package_object,
+	acpi_size                       *buffer_size_needed)
+{
+	u32                             number_of_elements;
+	acpi_size                       temp_size_needed = 0;
+	union acpi_operand_object       **top_object_list;
+	u32                             index;
+	union acpi_operand_object       *package_element;
+	union acpi_operand_object       **sub_object_list;
+	u8                              name_found;
+	u32                             table_index;
+
+
+	ACPI_FUNCTION_TRACE ("rs_get_pci_routing_table_length");
+
+
+	number_of_elements = package_object->package.count;
+
+	/*
+	 * Calculate the size of the return buffer.
+	 * The base size is the number of elements * the sizes of the
+	 * structures.  Additional space for the strings is added below.
+	 * The minus one is to subtract the size of the u8 Source[1]
+	 * member because it is added below.
+	 *
+	 * But each PRT_ENTRY structure has a pointer to a string and
+	 * the size of that string must be found.
+	 */
+	top_object_list = package_object->package.elements;
+
+	for (index = 0; index < number_of_elements; index++) {
+		/*
+		 * Dereference the sub-package
+		 */
+		package_element = *top_object_list;
+
+		/*
+		 * The sub_object_list will now point to an array of the
+		 * four IRQ elements: Address, Pin, Source and source_index
+		 */
+		sub_object_list = package_element->package.elements;
+
+		/*
+		 * Scan the irq_table_elements for the Source Name String
+		 */
+		name_found = FALSE;
+
+		for (table_index = 0; table_index < 4 && !name_found; table_index++) {
+			if ((ACPI_TYPE_STRING == ACPI_GET_OBJECT_TYPE (*sub_object_list)) ||
+				((ACPI_TYPE_LOCAL_REFERENCE == ACPI_GET_OBJECT_TYPE (*sub_object_list)) &&
+					((*sub_object_list)->reference.opcode == AML_INT_NAMEPATH_OP))) {
+				name_found = TRUE;
+			}
+			else {
+				/*
+				 * Look at the next element
+				 */
+				sub_object_list++;
+			}
+		}
+
+		temp_size_needed += (sizeof (struct acpi_pci_routing_table) - 4);
+
+		/*
+		 * Was a String type found?
+		 */
+		if (name_found) {
+			if (ACPI_GET_OBJECT_TYPE (*sub_object_list) == ACPI_TYPE_STRING) {
+				/*
+				 * The length String.Length field does not include the
+				 * terminating NULL, add 1
+				 */
+				temp_size_needed += ((acpi_size) (*sub_object_list)->string.length + 1);
+			}
+			else {
+				temp_size_needed += acpi_ns_get_pathname_length (
+						   (*sub_object_list)->reference.node);
+			}
+		}
+		else {
+			/*
+			 * If no name was found, then this is a NULL, which is
+			 * translated as a u32 zero.
+			 */
+			temp_size_needed += sizeof (u32);
+		}
+
+		/* Round up the size since each element must be aligned */
+
+		temp_size_needed = ACPI_ROUND_UP_to_64_bITS (temp_size_needed);
+
+		/*
+		 * Point to the next union acpi_operand_object
+		 */
+		top_object_list++;
+	}
+
+	/*
+	 * Adding an extra element to the end of the list, essentially a NULL terminator
+	 */
+	*buffer_size_needed = temp_size_needed + sizeof (struct acpi_pci_routing_table);
+	return_ACPI_STATUS (AE_OK);
+}