drivers/acpi/resources/rsirq.c - third_party/linux - Git at Google

 /*******************************************************************************
  *
  * Module Name: rsirq - IRQ resource descriptors
  *
  ******************************************************************************/

 /*
  * 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>

 #define _COMPONENT          ACPI_RESOURCES
 	 ACPI_MODULE_NAME    ("rsirq")


 /*******************************************************************************
  *
  * FUNCTION:    acpi_rs_irq_resource
  *
  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
  *                                        stream
  *              bytes_consumed          - Pointer to where the number of bytes
  *                                        consumed the byte_stream_buffer is
  *                                        returned
  *              output_buffer           - Pointer to the return data buffer
  *              structure_size          - Pointer to where the number of bytes
  *                                        in the return data struct is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Take the resource byte stream and fill out the appropriate
  *              structure pointed to by the output_buffer. Return the
  *              number of bytes consumed from the byte stream.
  *
  ******************************************************************************/

 acpi_status
 acpi_rs_irq_resource (
 	u8                              *byte_stream_buffer,
 	acpi_size                       *bytes_consumed,
 	u8                              **output_buffer,
 	acpi_size                       *structure_size)
 {
 	u8                              *buffer = byte_stream_buffer;
 	struct acpi_resource            *output_struct = (void *) *output_buffer;
 	u16                             temp16 = 0;
 	u8                              temp8 = 0;
 	u8                              index;
 	u8                              i;
 	acpi_size                       struct_size = ACPI_SIZEOF_RESOURCE (
 			  struct acpi_resource_irq);


 	ACPI_FUNCTION_TRACE ("rs_irq_resource");


 	/*
 	 * The number of bytes consumed are contained in the descriptor
 	 * (Bits:0-1)
 	 */
 	temp8 = *buffer;
 	*bytes_consumed = (temp8 & 0x03) + 1;
 	output_struct->id = ACPI_RSTYPE_IRQ;

 	/* Point to the 16-bits of Bytes 1 and 2 */

 	buffer += 1;
 	ACPI_MOVE_16_TO_16 (&temp16, buffer);

 	output_struct->data.irq.number_of_interrupts = 0;

 	/* Decode the IRQ bits */

 	for (i = 0, index = 0; index < 16; index++) {
 		if ((temp16 >> index) & 0x01) {
 			output_struct->data.irq.interrupts[i] = index;
 			i++;
 		}
 	}

 	/* Zero interrupts is valid */

 	output_struct->data.irq.number_of_interrupts = i;
 	if (i > 0) {
 		/* Calculate the structure size based upon the number of interrupts */

 		struct_size += ((acpi_size) i - 1) * 4;
 	}

 	/* Point to Byte 3 if it is used */

 	if (4 == *bytes_consumed) {
 		buffer += 2;
 		temp8 = *buffer;

 		/* Check for HE, LL interrupts */

 		switch (temp8 & 0x09) {
 		case 0x01: /* HE */
 			output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
 			output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
 			break;

 		case 0x08: /* LL */
 			output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE;
 			output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW;
 			break;

 		default:
 			/*
 			 * Only _LL and _HE polarity/trigger interrupts
 			 * are allowed (ACPI spec, section "IRQ Format")
 			 * so 0x00 and 0x09 are illegal.
 			 */
 			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 				"Invalid interrupt polarity/trigger in resource list, %X\n",
 				temp8));
 			return_ACPI_STATUS (AE_BAD_DATA);
 		}

 		/* Check for sharable */

 		output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
 	}
 	else {
 		/*
 		 * Assume Edge Sensitive, Active High, Non-Sharable
 		 * per ACPI Specification
 		 */
 		output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
 		output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
 		output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
 	}

 	/* Set the Length parameter */

 	output_struct->length = (u32) struct_size;

 	/* Return the final size of the structure */

 	*structure_size = struct_size;
 	return_ACPI_STATUS (AE_OK);
 }


 /*******************************************************************************
  *
  * FUNCTION:    acpi_rs_irq_stream
  *
  * PARAMETERS:  linked_list             - Pointer to the resource linked list
  *              output_buffer           - Pointer to the user's return buffer
  *              bytes_consumed          - Pointer to where the number of bytes
  *                                        used in the output_buffer is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Take the linked list resource structure and fills in the
  *              the appropriate bytes in a byte stream
  *
  ******************************************************************************/

 acpi_status
 acpi_rs_irq_stream (
 	struct acpi_resource            *linked_list,
 	u8                              **output_buffer,
 	acpi_size                       *bytes_consumed)
 {
 	u8                              *buffer = *output_buffer;
 	u16                             temp16 = 0;
 	u8                              temp8 = 0;
 	u8                              index;
 	u8                              IRqinfo_byte_needed;


 	ACPI_FUNCTION_TRACE ("rs_irq_stream");


 	/*
 	 * The descriptor field is set based upon whether a third byte is
 	 * needed to contain the IRQ Information.
 	 */
 	if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level &&
 		ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low &&
 		ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) {
 		*buffer = 0x22;
 		IRqinfo_byte_needed = FALSE;
 	}
 	else {
 		*buffer = 0x23;
 		IRqinfo_byte_needed = TRUE;
 	}

 	buffer += 1;
 	temp16 = 0;

 	/* Loop through all of the interrupts and set the mask bits */

 	for(index = 0;
 		index < linked_list->data.irq.number_of_interrupts;
 		index++) {
 		temp8 = (u8) linked_list->data.irq.interrupts[index];
 		temp16 |= 0x1 << temp8;
 	}

 	ACPI_MOVE_16_TO_16 (buffer, &temp16);
 	buffer += 2;

 	/* Set the IRQ Info byte if needed. */

 	if (IRqinfo_byte_needed) {
 		temp8 = 0;
 		temp8 = (u8) ((linked_list->data.irq.shared_exclusive &
 				 0x01) << 4);

 		if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level &&
 			ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) {
 			temp8 |= 0x08;
 		}
 		else {
 			temp8 |= 0x01;
 		}

 		*buffer = temp8;
 		buffer += 1;
 	}

 	/* Return the number of bytes consumed in this operation */

 	*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
 	return_ACPI_STATUS (AE_OK);
 }


 /*******************************************************************************
  *
  * FUNCTION:    acpi_rs_extended_irq_resource
  *
  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
  *                                        stream
  *              bytes_consumed          - Pointer to where the number of bytes
  *                                        consumed the byte_stream_buffer is
  *                                        returned
  *              output_buffer           - Pointer to the return data buffer
  *              structure_size          - Pointer to where the number of bytes
  *                                        in the return data struct is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Take the resource byte stream and fill out the appropriate
  *              structure pointed to by the output_buffer. Return the
  *              number of bytes consumed from the byte stream.
  *
  ******************************************************************************/

 acpi_status
 acpi_rs_extended_irq_resource (
 	u8                              *byte_stream_buffer,
 	acpi_size                       *bytes_consumed,
 	u8                              **output_buffer,
 	acpi_size                       *structure_size)
 {
 	u8                              *buffer = byte_stream_buffer;
 	struct acpi_resource            *output_struct = (void *) *output_buffer;
 	u16                             temp16 = 0;
 	u8                              temp8 = 0;
 	u8                              *temp_ptr;
 	u8                              index;
 	acpi_size                       struct_size = ACPI_SIZEOF_RESOURCE (
 			  struct acpi_resource_ext_irq);


 	ACPI_FUNCTION_TRACE ("rs_extended_irq_resource");


 	/* Point past the Descriptor to get the number of bytes consumed */

 	buffer += 1;
 	ACPI_MOVE_16_TO_16 (&temp16, buffer);

 	/* Validate minimum descriptor length */

 	if (temp16 < 6) {
 		return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
 	}

 	*bytes_consumed = temp16 + 3;
 	output_struct->id = ACPI_RSTYPE_EXT_IRQ;

 	/* Point to the Byte3 */

 	buffer += 2;
 	temp8 = *buffer;

 	output_struct->data.extended_irq.producer_consumer = temp8 & 0x01;

 	/*
 	 * Check for Interrupt Mode
 	 *
 	 * The definition of an Extended IRQ changed between ACPI spec v1.0b
 	 * and ACPI spec 2.0 (section 6.4.3.6 in both).
 	 *
 	 * - Edge/Level are defined opposite in the table vs the headers
 	 */
 	output_struct->data.extended_irq.edge_level =
 		(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;

 	/* Check Interrupt Polarity */

 	output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;

 	/* Check for sharable */

 	output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;

 	/* Point to Byte4 (IRQ Table length) */

 	buffer += 1;
 	temp8 = *buffer;

 	/* Must have at least one IRQ */

 	if (temp8 < 1) {
 		return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
 	}

 	output_struct->data.extended_irq.number_of_interrupts = temp8;

 	/*
 	 * Add any additional structure size to properly calculate
 	 * the next pointer at the end of this function
 	 */
 	struct_size += (temp8 - 1) * 4;

 	/* Point to Byte5 (First IRQ Number) */

 	buffer += 1;

 	/* Cycle through every IRQ in the table */

 	for (index = 0; index < temp8; index++) {
 		ACPI_MOVE_32_TO_32 (
 			&output_struct->data.extended_irq.interrupts[index], buffer);

 		/* Point to the next IRQ */

 		buffer += 4;
 	}

 	/*
 	 * This will leave us pointing to the Resource Source Index
 	 * If it is present, then save it off and calculate the
 	 * pointer to where the null terminated string goes:
 	 * Each Interrupt takes 32-bits + the 5 bytes of the
 	 * stream that are default.
 	 *
 	 * Note: Some resource descriptors will have an additional null, so
 	 * we add 1 to the length.
 	 */
 	if (*bytes_consumed >
 		((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) +
 		(5 + 1)) {
 		/* Dereference the Index */

 		temp8 = *buffer;
 		output_struct->data.extended_irq.resource_source.index = (u32) temp8;

 		/* Point to the String */

 		buffer += 1;

 		/* Point the String pointer to the end of this structure. */

 		output_struct->data.extended_irq.resource_source.string_ptr =
 				(char *)((char *) output_struct + struct_size);

 		temp_ptr = (u8 *)
 			output_struct->data.extended_irq.resource_source.string_ptr;

 		/* Copy the string into the buffer */

 		index = 0;
 		while (0x00 != *buffer) {
 			*temp_ptr = *buffer;

 			temp_ptr += 1;
 			buffer += 1;
 			index += 1;
 		}

 		/* Add the terminating null */

 		*temp_ptr = 0x00;
 		output_struct->data.extended_irq.resource_source.string_length = index + 1;

 		/*
 		 * In order for the struct_size to fall on a 32-bit boundary,
 		 * calculate the length of the string and expand the
 		 * struct_size to the next 32-bit boundary.
 		 */
 		temp8 = (u8) (index + 1);
 		struct_size += ACPI_ROUND_UP_to_32_bITS (temp8);
 	}
 	else {
 		output_struct->data.extended_irq.resource_source.index = 0x00;
 		output_struct->data.extended_irq.resource_source.string_length = 0;
 		output_struct->data.extended_irq.resource_source.string_ptr = NULL;
 	}

 	/* Set the Length parameter */

 	output_struct->length = (u32) struct_size;

 	/* Return the final size of the structure */

 	*structure_size = struct_size;
 	return_ACPI_STATUS (AE_OK);
 }


 /*******************************************************************************
  *
  * FUNCTION:    acpi_rs_extended_irq_stream
  *
  * PARAMETERS:  linked_list             - Pointer to the resource linked list
  *              output_buffer           - Pointer to the user's return buffer
  *              bytes_consumed          - Pointer to where the number of bytes
  *                                        used in the output_buffer is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Take the linked list resource structure and fills in the
  *              the appropriate bytes in a byte stream
  *
  ******************************************************************************/

 acpi_status
 acpi_rs_extended_irq_stream (
 	struct acpi_resource            *linked_list,
 	u8                              **output_buffer,
 	acpi_size                       *bytes_consumed)
 {
 	u8                              *buffer = *output_buffer;
 	u16                             *length_field;
 	u8                              temp8 = 0;
 	u8                              index;
 	char                            *temp_pointer = NULL;


 	ACPI_FUNCTION_TRACE ("rs_extended_irq_stream");


 	/* The descriptor field is static */

 	*buffer = 0x89;
 	buffer += 1;

 	/* Set a pointer to the Length field - to be filled in later */

 	length_field = ACPI_CAST_PTR (u16, buffer);
 	buffer += 2;

 	/* Set the Interrupt vector flags */

 	temp8 = (u8)(linked_list->data.extended_irq.producer_consumer & 0x01);
 	temp8 |= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3);

 	/*
 	 * Set the Interrupt Mode
 	 *
 	 * The definition of an Extended IRQ changed between ACPI spec v1.0b
 	 * and ACPI spec 2.0 (section 6.4.3.6 in both).  This code does not
 	 * implement the more restrictive definition of 1.0b
 	 *
 	 * - Edge/Level are defined opposite in the table vs the headers
 	 */
 	if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) {
 		temp8 |= 0x2;
 	}

 	/* Set the Interrupt Polarity */

 	temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2);

 	*buffer = temp8;
 	buffer += 1;

 	/* Set the Interrupt table length */

 	temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts;

 	*buffer = temp8;
 	buffer += 1;

 	for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts;
 		 index++) {
 		ACPI_MOVE_32_TO_32 (buffer,
 				  &linked_list->data.extended_irq.interrupts[index]);
 		buffer += 4;
 	}

 	/* Resource Source Index and Resource Source are optional */

 	if (0 != linked_list->data.extended_irq.resource_source.string_length) {
 		*buffer = (u8) linked_list->data.extended_irq.resource_source.index;
 		buffer += 1;

 		temp_pointer = (char *) buffer;

 		/* Copy the string */

 		ACPI_STRCPY (temp_pointer,
 			linked_list->data.extended_irq.resource_source.string_ptr);

 		/*
 		 * Buffer needs to be set to the length of the sting + one for the
 		 * terminating null
 		 */
 		buffer += (acpi_size) (ACPI_STRLEN (
 			linked_list->data.extended_irq.resource_source.string_ptr) + 1);
 	}

 	/* Return the number of bytes consumed in this operation */

 	*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);

 	/*
 	 * Set the length field to the number of bytes consumed
 	 * minus the header size (3 bytes)
 	 */
 	*length_field = (u16) (*bytes_consumed - 3);
 	return_ACPI_STATUS (AE_OK);
 }
	/*******************************************************************************
	*
	* Module Name: rsirq - IRQ resource descriptors
	*
	******************************************************************************/

	/*
	* 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>

	#define _COMPONENT ACPI_RESOURCES
	ACPI_MODULE_NAME ("rsirq")


	/*******************************************************************************
	*
	* FUNCTION: acpi_rs_irq_resource
	*
	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	* stream
	* bytes_consumed - Pointer to where the number of bytes
	* consumed the byte_stream_buffer is
	* returned
	* output_buffer - Pointer to the return data buffer
	* structure_size - Pointer to where the number of bytes
	* in the return data struct is returned
	*
	* RETURN: Status
	*
	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	* structure pointed to by the output_buffer. Return the
	* number of bytes consumed from the byte stream.
	*
	******************************************************************************/

	acpi_status
	acpi_rs_irq_resource (
	u8 *byte_stream_buffer,
	acpi_size *bytes_consumed,
	u8 **output_buffer,
	acpi_size *structure_size)
	{
	u8 *buffer = byte_stream_buffer;
	struct acpi_resource output_struct = (void ) *output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 index;
	u8 i;
	acpi_size struct_size = ACPI_SIZEOF_RESOURCE (
	struct acpi_resource_irq);


	ACPI_FUNCTION_TRACE ("rs_irq_resource");


	/*
	* The number of bytes consumed are contained in the descriptor
	* (Bits:0-1)
	*/
	temp8 = *buffer;
	*bytes_consumed = (temp8 & 0x03) + 1;
	output_struct->id = ACPI_RSTYPE_IRQ;

	/* Point to the 16-bits of Bytes 1 and 2 */

	buffer += 1;
	ACPI_MOVE_16_TO_16 (&temp16, buffer);

	output_struct->data.irq.number_of_interrupts = 0;

	/* Decode the IRQ bits */

	for (i = 0, index = 0; index < 16; index++) {
	if ((temp16 >> index) & 0x01) {
	output_struct->data.irq.interrupts[i] = index;
	i++;
	}
	}

	/* Zero interrupts is valid */

	output_struct->data.irq.number_of_interrupts = i;
	if (i > 0) {
	/* Calculate the structure size based upon the number of interrupts */

	struct_size += ((acpi_size) i - 1) * 4;
	}

	/* Point to Byte 3 if it is used */

	if (4 == *bytes_consumed) {
	buffer += 2;
	temp8 = *buffer;

	/* Check for HE, LL interrupts */

	switch (temp8 & 0x09) {
	case 0x01: /* HE */
	output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
	output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
	break;

	case 0x08: /* LL */
	output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE;
	output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW;
	break;

	default:
	/*
	* Only _LL and _HE polarity/trigger interrupts
	* are allowed (ACPI spec, section "IRQ Format")
	* so 0x00 and 0x09 are illegal.
	*/
	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
	"Invalid interrupt polarity/trigger in resource list, %X\n",
	temp8));
	return_ACPI_STATUS (AE_BAD_DATA);
	}

	/* Check for sharable */

	output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
	}
	else {
	/*
	* Assume Edge Sensitive, Active High, Non-Sharable
	* per ACPI Specification
	*/
	output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
	output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
	output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
	}

	/* Set the Length parameter */

	output_struct->length = (u32) struct_size;

	/* Return the final size of the structure */

	*structure_size = struct_size;
	return_ACPI_STATUS (AE_OK);
	}


	/*******************************************************************************
	*
	* FUNCTION: acpi_rs_irq_stream
	*
	* PARAMETERS: linked_list - Pointer to the resource linked list
	* output_buffer - Pointer to the user's return buffer
	* bytes_consumed - Pointer to where the number of bytes
	* used in the output_buffer is returned
	*
	* RETURN: Status
	*
	* DESCRIPTION: Take the linked list resource structure and fills in the
	* the appropriate bytes in a byte stream
	*
	******************************************************************************/

	acpi_status
	acpi_rs_irq_stream (
	struct acpi_resource *linked_list,
	u8 **output_buffer,
	acpi_size *bytes_consumed)
	{
	u8 buffer = output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 index;
	u8 IRqinfo_byte_needed;


	ACPI_FUNCTION_TRACE ("rs_irq_stream");


	/*
	* The descriptor field is set based upon whether a third byte is
	* needed to contain the IRQ Information.
	*/
	if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level &&
	ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low &&
	ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) {
	*buffer = 0x22;
	IRqinfo_byte_needed = FALSE;
	}
	else {
	*buffer = 0x23;
	IRqinfo_byte_needed = TRUE;
	}

	buffer += 1;
	temp16 = 0;

	/* Loop through all of the interrupts and set the mask bits */

	for(index = 0;
	index < linked_list->data.irq.number_of_interrupts;
	index++) {
	temp8 = (u8) linked_list->data.irq.interrupts[index];
	temp16 \|= 0x1 << temp8;
	}

	ACPI_MOVE_16_TO_16 (buffer, &temp16);
	buffer += 2;

	/* Set the IRQ Info byte if needed. */

	if (IRqinfo_byte_needed) {
	temp8 = 0;
	temp8 = (u8) ((linked_list->data.irq.shared_exclusive &
	0x01) << 4);

	if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level &&
	ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) {
	temp8 \|= 0x08;
	}
	else {
	temp8 \|= 0x01;
	}

	*buffer = temp8;
	buffer += 1;
	}

	/* Return the number of bytes consumed in this operation */

	bytes_consumed = ACPI_PTR_DIFF (buffer, output_buffer);
	return_ACPI_STATUS (AE_OK);
	}


	/*******************************************************************************
	*
	* FUNCTION: acpi_rs_extended_irq_resource
	*
	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	* stream
	* bytes_consumed - Pointer to where the number of bytes
	* consumed the byte_stream_buffer is
	* returned
	* output_buffer - Pointer to the return data buffer
	* structure_size - Pointer to where the number of bytes
	* in the return data struct is returned
	*
	* RETURN: Status
	*
	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	* structure pointed to by the output_buffer. Return the
	* number of bytes consumed from the byte stream.
	*
	******************************************************************************/

	acpi_status
	acpi_rs_extended_irq_resource (
	u8 *byte_stream_buffer,
	acpi_size *bytes_consumed,
	u8 **output_buffer,
	acpi_size *structure_size)
	{
	u8 *buffer = byte_stream_buffer;
	struct acpi_resource output_struct = (void ) *output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 *temp_ptr;
	u8 index;
	acpi_size struct_size = ACPI_SIZEOF_RESOURCE (
	struct acpi_resource_ext_irq);


	ACPI_FUNCTION_TRACE ("rs_extended_irq_resource");


	/* Point past the Descriptor to get the number of bytes consumed */

	buffer += 1;
	ACPI_MOVE_16_TO_16 (&temp16, buffer);

	/* Validate minimum descriptor length */

	if (temp16 < 6) {
	return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
	}

	*bytes_consumed = temp16 + 3;
	output_struct->id = ACPI_RSTYPE_EXT_IRQ;

	/* Point to the Byte3 */

	buffer += 2;
	temp8 = *buffer;

	output_struct->data.extended_irq.producer_consumer = temp8 & 0x01;

	/*
	* Check for Interrupt Mode
	*
	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	* and ACPI spec 2.0 (section 6.4.3.6 in both).
	*
	* - Edge/Level are defined opposite in the table vs the headers
	*/
	output_struct->data.extended_irq.edge_level =
	(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;

	/* Check Interrupt Polarity */

	output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;

	/* Check for sharable */

	output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;

	/* Point to Byte4 (IRQ Table length) */

	buffer += 1;
	temp8 = *buffer;

	/* Must have at least one IRQ */

	if (temp8 < 1) {
	return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
	}

	output_struct->data.extended_irq.number_of_interrupts = temp8;

	/*
	* Add any additional structure size to properly calculate
	* the next pointer at the end of this function
	*/
	struct_size += (temp8 - 1) * 4;

	/* Point to Byte5 (First IRQ Number) */

	buffer += 1;

	/* Cycle through every IRQ in the table */

	for (index = 0; index < temp8; index++) {
	ACPI_MOVE_32_TO_32 (
	&output_struct->data.extended_irq.interrupts[index], buffer);

	/* Point to the next IRQ */

	buffer += 4;
	}

	/*
	* This will leave us pointing to the Resource Source Index
	* If it is present, then save it off and calculate the
	* pointer to where the null terminated string goes:
	* Each Interrupt takes 32-bits + the 5 bytes of the
	* stream that are default.
	*
	* Note: Some resource descriptors will have an additional null, so
	* we add 1 to the length.
	*/
	if (*bytes_consumed >
	((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) +
	(5 + 1)) {
	/* Dereference the Index */

	temp8 = *buffer;
	output_struct->data.extended_irq.resource_source.index = (u32) temp8;

	/* Point to the String */

	buffer += 1;

	/* Point the String pointer to the end of this structure. */

	output_struct->data.extended_irq.resource_source.string_ptr =
	(char )((char ) output_struct + struct_size);

	temp_ptr = (u8 *)
	output_struct->data.extended_irq.resource_source.string_ptr;

	/* Copy the string into the buffer */

	index = 0;
	while (0x00 != *buffer) {
	temp_ptr = buffer;

	temp_ptr += 1;
	buffer += 1;
	index += 1;
	}

	/* Add the terminating null */

	*temp_ptr = 0x00;
	output_struct->data.extended_irq.resource_source.string_length = index + 1;

	/*
	* In order for the struct_size to fall on a 32-bit boundary,
	* calculate the length of the string and expand the
	* struct_size to the next 32-bit boundary.
	*/
	temp8 = (u8) (index + 1);
	struct_size += ACPI_ROUND_UP_to_32_bITS (temp8);
	}
	else {
	output_struct->data.extended_irq.resource_source.index = 0x00;
	output_struct->data.extended_irq.resource_source.string_length = 0;
	output_struct->data.extended_irq.resource_source.string_ptr = NULL;
	}

	/* Set the Length parameter */

	output_struct->length = (u32) struct_size;

	/* Return the final size of the structure */

	*structure_size = struct_size;
	return_ACPI_STATUS (AE_OK);
	}


	/*******************************************************************************
	*
	* FUNCTION: acpi_rs_extended_irq_stream
	*
	* PARAMETERS: linked_list - Pointer to the resource linked list
	* output_buffer - Pointer to the user's return buffer
	* bytes_consumed - Pointer to where the number of bytes
	* used in the output_buffer is returned
	*
	* RETURN: Status
	*
	* DESCRIPTION: Take the linked list resource structure and fills in the
	* the appropriate bytes in a byte stream
	*
	******************************************************************************/

	acpi_status
	acpi_rs_extended_irq_stream (
	struct acpi_resource *linked_list,
	u8 **output_buffer,
	acpi_size *bytes_consumed)
	{
	u8 buffer = output_buffer;
	u16 *length_field;
	u8 temp8 = 0;
	u8 index;
	char *temp_pointer = NULL;


	ACPI_FUNCTION_TRACE ("rs_extended_irq_stream");


	/* The descriptor field is static */

	*buffer = 0x89;
	buffer += 1;

	/* Set a pointer to the Length field - to be filled in later */

	length_field = ACPI_CAST_PTR (u16, buffer);
	buffer += 2;

	/* Set the Interrupt vector flags */

	temp8 = (u8)(linked_list->data.extended_irq.producer_consumer & 0x01);
	temp8 \|= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3);

	/*
	* Set the Interrupt Mode
	*
	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	* and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not
	* implement the more restrictive definition of 1.0b
	*
	* - Edge/Level are defined opposite in the table vs the headers
	*/
	if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) {
	temp8 \|= 0x2;
	}

	/* Set the Interrupt Polarity */

	temp8 \|= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2);

	*buffer = temp8;
	buffer += 1;

	/* Set the Interrupt table length */

	temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts;

	*buffer = temp8;
	buffer += 1;

	for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts;
	index++) {
	ACPI_MOVE_32_TO_32 (buffer,
	&linked_list->data.extended_irq.interrupts[index]);
	buffer += 4;
	}

	/* Resource Source Index and Resource Source are optional */

	if (0 != linked_list->data.extended_irq.resource_source.string_length) {
	*buffer = (u8) linked_list->data.extended_irq.resource_source.index;
	buffer += 1;

	temp_pointer = (char *) buffer;

	/* Copy the string */

	ACPI_STRCPY (temp_pointer,
	linked_list->data.extended_irq.resource_source.string_ptr);

	/*
	* Buffer needs to be set to the length of the sting + one for the
	* terminating null
	*/
	buffer += (acpi_size) (ACPI_STRLEN (
	linked_list->data.extended_irq.resource_source.string_ptr) + 1);
	}

	/* Return the number of bytes consumed in this operation */

	bytes_consumed = ACPI_PTR_DIFF (buffer, output_buffer);

	/*
	* Set the length field to the number of bytes consumed
	* minus the header size (3 bytes)
	*/
	length_field = (u16) (bytes_consumed - 3);
	return_ACPI_STATUS (AE_OK);
	}