[deliverable/linux.git] / drivers / acpi / resources / rslist.c

/*******************************************************************************
 *
 * Module Name: rslist - Linked list utilities
 *
 ******************************************************************************/

/*
 * 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("rslist")

/* Dispatch table for convert-to-stream functions */
typedef
acpi_status(*ACPI_STREAM_HANDLER) (struct acpi_resource * resource,
				   u8 ** output_buffer,
				   acpi_size * bytes_consumed);

static ACPI_STREAM_HANDLER acpi_gbl_stream_dispatch[] = {
	acpi_rs_irq_stream,	/* ACPI_RSTYPE_IRQ */
	acpi_rs_dma_stream,	/* ACPI_RSTYPE_DMA */
	acpi_rs_start_depend_fns_stream,	/* ACPI_RSTYPE_START_DPF */
	acpi_rs_end_depend_fns_stream,	/* ACPI_RSTYPE_END_DPF */
	acpi_rs_io_stream,	/* ACPI_RSTYPE_IO */
	acpi_rs_fixed_io_stream,	/* ACPI_RSTYPE_FIXED_IO */
	acpi_rs_vendor_stream,	/* ACPI_RSTYPE_VENDOR */
	acpi_rs_end_tag_stream,	/* ACPI_RSTYPE_END_TAG */
	acpi_rs_memory24_stream,	/* ACPI_RSTYPE_MEM24 */
	acpi_rs_memory32_range_stream,	/* ACPI_RSTYPE_MEM32 */
	acpi_rs_fixed_memory32_stream,	/* ACPI_RSTYPE_FIXED_MEM32 */
	acpi_rs_address16_stream,	/* ACPI_RSTYPE_ADDRESS16 */
	acpi_rs_address32_stream,	/* ACPI_RSTYPE_ADDRESS32 */
	acpi_rs_address64_stream,	/* ACPI_RSTYPE_ADDRESS64 */
	acpi_rs_extended_irq_stream,	/* ACPI_RSTYPE_EXT_IRQ */
	acpi_rs_generic_register_stream	/* ACPI_RSTYPE_GENERIC_REG */
};

/* Dispatch tables for convert-to-resource functions */

typedef
acpi_status(*ACPI_RESOURCE_HANDLER) (u8 * byte_stream_buffer,
				     acpi_size * bytes_consumed,
				     u8 ** output_buffer,
				     acpi_size * structure_size);

static ACPI_RESOURCE_HANDLER acpi_gbl_sm_resource_dispatch[] = {
	NULL,			/* 0x00, Reserved */
	NULL,			/* 0x01, Reserved */
	NULL,			/* 0x02, Reserved */
	NULL,			/* 0x03, Reserved */
	acpi_rs_irq_resource,	/* ACPI_RDESC_TYPE_IRQ_FORMAT */
	acpi_rs_dma_resource,	/* ACPI_RDESC_TYPE_DMA_FORMAT */
	acpi_rs_start_depend_fns_resource,	/* ACPI_RDESC_TYPE_START_DEPENDENT */
	acpi_rs_end_depend_fns_resource,	/* ACPI_RDESC_TYPE_END_DEPENDENT */
	acpi_rs_io_resource,	/* ACPI_RDESC_TYPE_IO_PORT */
	acpi_rs_fixed_io_resource,	/* ACPI_RDESC_TYPE_FIXED_IO_PORT */
	NULL,			/* 0x0A, Reserved */
	NULL,			/* 0x0B, Reserved */
	NULL,			/* 0x0C, Reserved */
	NULL,			/* 0x0D, Reserved */
	acpi_rs_vendor_resource,	/* ACPI_RDESC_TYPE_SMALL_VENDOR */
	acpi_rs_end_tag_resource	/* ACPI_RDESC_TYPE_END_TAG */
};

static ACPI_RESOURCE_HANDLER acpi_gbl_lg_resource_dispatch[] = {
	NULL,			/* 0x00, Reserved */
	acpi_rs_memory24_resource,	/* ACPI_RDESC_TYPE_MEMORY_24 */
	acpi_rs_generic_register_resource,	/* ACPI_RDESC_TYPE_GENERIC_REGISTER */
	NULL,			/* 0x03, Reserved */
	acpi_rs_vendor_resource,	/* ACPI_RDESC_TYPE_LARGE_VENDOR */
	acpi_rs_memory32_range_resource,	/* ACPI_RDESC_TYPE_MEMORY_32 */
	acpi_rs_fixed_memory32_resource,	/* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */
	acpi_rs_address32_resource,	/* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */
	acpi_rs_address16_resource,	/* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */
	acpi_rs_extended_irq_resource,	/* ACPI_RDESC_TYPE_EXTENDED_XRUPT */
	acpi_rs_address64_resource,	/* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */
	acpi_rs_address64_resource	/* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */
};

/* Local prototypes */

static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type);

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_get_resource_type
 *
 * PARAMETERS:  resource_type       - Byte 0 of a resource descriptor
 *
 * RETURN:      The Resource Type with no extraneous bits (except the large/
 *              small bit -- left alone)
 *
 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
 *              a resource descriptor.
 *
 ******************************************************************************/

u8 acpi_rs_get_resource_type(u8 resource_type)
{
	ACPI_FUNCTION_ENTRY();

	/* Determine if this is a small or large resource */

	if (resource_type & ACPI_RDESC_TYPE_LARGE) {
		/* Large Resource Type -- bits 6:0 contain the name */

		return (resource_type);
	} else {
		/* Small Resource Type -- bits 6:3 contain the name */

		return ((u8) (resource_type & ACPI_RDESC_SMALL_MASK));
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_get_resource_handler
 *
 * PARAMETERS:  resource_type       - Byte 0 of a resource descriptor
 *
 * RETURN:      Pointer to the resource conversion handler
 *
 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
 *              a resource descriptor.
 *
 ******************************************************************************/

static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
{
	ACPI_FUNCTION_ENTRY();

	/* Determine if this is a small or large resource */

	if (resource_type & ACPI_RDESC_TYPE_LARGE) {
		/* Large Resource Type -- bits 6:0 contain the name */

		if (resource_type > ACPI_RDESC_LARGE_MAX) {
			return (NULL);
		}

		return (acpi_gbl_lg_resource_dispatch[(resource_type &
						       ACPI_RDESC_LARGE_MASK)]);
	} else {
		/* Small Resource Type -- bits 6:3 contain the name */

		return (acpi_gbl_sm_resource_dispatch[((resource_type &
							ACPI_RDESC_SMALL_MASK)
						       >> 3)]);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_byte_stream_to_list
 *
 * PARAMETERS:  byte_stream_buffer      - Pointer to the resource byte stream
 *              byte_stream_buffer_length - Length of byte_stream_buffer
 *              output_buffer           - Pointer to the buffer that will
 *                                        contain the output structures
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Takes the resource byte stream and parses it, creating a
 *              linked list of resources in the caller's output buffer
 *
 ******************************************************************************/

acpi_status
acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
			    u32 byte_stream_buffer_length, u8 * output_buffer)
{
	u8 *buffer = output_buffer;
	acpi_status status;
	acpi_size bytes_parsed = 0;
	acpi_size bytes_consumed = 0;
	acpi_size structure_size = 0;
	struct acpi_resource *resource;
	ACPI_RESOURCE_HANDLER handler;

	ACPI_FUNCTION_TRACE("rs_byte_stream_to_list");

	/* Loop until end-of-buffer or an end_tag is found */

	while (bytes_parsed < byte_stream_buffer_length) {
		/* Get the handler associated with this Descriptor Type */

		handler = acpi_rs_get_resource_handler(*byte_stream_buffer);
		if (handler) {
			/* Convert a byte stream resource to local resource struct */

			status = handler(byte_stream_buffer, &bytes_consumed,
					 &buffer, &structure_size);
		} else {
			/* Invalid resource type */

			status = AE_AML_INVALID_RESOURCE_TYPE;
		}

		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Set the aligned length of the new resource descriptor */

		resource = ACPI_CAST_PTR(struct acpi_resource, buffer);
		resource->length =
		    (u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length);

		/* Normal exit on completion of an end_tag resource descriptor */

		if (acpi_rs_get_resource_type(*byte_stream_buffer) ==
		    ACPI_RDESC_TYPE_END_TAG) {
			return_ACPI_STATUS(AE_OK);
		}

		/* Update counter and point to the next input resource */

		bytes_parsed += bytes_consumed;
		byte_stream_buffer += bytes_consumed;

		/* Point to the next structure in the output buffer */

		buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size);
	}

	/* Completed buffer, but did not find an end_tag resource descriptor */

	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_list_to_byte_stream
 *
 * PARAMETERS:  Resource                - Pointer to the resource linked list
 *              byte_steam_size_needed  - Calculated size of the byte stream
 *                                        needed from calling
 *                                        acpi_rs_get_byte_stream_length()
 *                                        The size of the output_buffer is
 *                                        guaranteed to be >=
 *                                        byte_stream_size_needed
 *              output_buffer           - Pointer to the buffer that will
 *                                        contain the byte stream
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Takes the resource linked list and parses it, creating a
 *              byte stream of resources in the caller's output buffer
 *
 ******************************************************************************/

acpi_status
acpi_rs_list_to_byte_stream(struct acpi_resource *resource,
			    acpi_size byte_stream_size_needed,
			    u8 * output_buffer)
{
	u8 *buffer = output_buffer;
	acpi_size bytes_consumed = 0;
	acpi_status status;

	ACPI_FUNCTION_TRACE("rs_list_to_byte_stream");

	/* Convert each resource descriptor in the list */

	while (1) {
		/* Validate Type before dispatch */

		if (resource->type > ACPI_RSTYPE_MAX) {
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "Invalid descriptor type (%X) in resource list\n",
					  resource->type));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* Perform the conversion, per resource type */

		status = acpi_gbl_stream_dispatch[resource->type] (resource,
								   &buffer,
								   &bytes_consumed);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Check for end-of-list */

		if (resource->type == ACPI_RSTYPE_END_TAG) {
			/* An End Tag indicates the end of the Resource Template */

			return_ACPI_STATUS(AE_OK);
		}

		/* Set the Buffer to point to the next (output) resource descriptor */

		buffer += bytes_consumed;

		/* Point to the next input resource object */

		resource = ACPI_PTR_ADD(struct acpi_resource,
					resource, resource->length);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: rslist - Linked list utilities
	4	*
	5	******************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4 LT	44	#include <acpi/acpi.h>
	45	#include <acpi/acresrc.h>
	46
	47	#define _COMPONENT ACPI_RESOURCES
4be44fcd	48	ACPI_MODULE_NAME("rslist")
1da177e4	49
bda663d3 RM	50	/* Dispatch table for convert-to-stream functions */
	51	typedef
	52	acpi_status(ACPI_STREAM_HANDLER) (struct acpi_resource resource,
	53	u8 ** output_buffer,
	54	acpi_size * bytes_consumed);
	55
	56	static ACPI_STREAM_HANDLER acpi_gbl_stream_dispatch[] = {
	57	acpi_rs_irq_stream, /* ACPI_RSTYPE_IRQ */
	58	acpi_rs_dma_stream, /* ACPI_RSTYPE_DMA */
	59	acpi_rs_start_depend_fns_stream, /* ACPI_RSTYPE_START_DPF */
	60	acpi_rs_end_depend_fns_stream, /* ACPI_RSTYPE_END_DPF */
	61	acpi_rs_io_stream, /* ACPI_RSTYPE_IO */
	62	acpi_rs_fixed_io_stream, /* ACPI_RSTYPE_FIXED_IO */
	63	acpi_rs_vendor_stream, /* ACPI_RSTYPE_VENDOR */
	64	acpi_rs_end_tag_stream, /* ACPI_RSTYPE_END_TAG */
	65	acpi_rs_memory24_stream, /* ACPI_RSTYPE_MEM24 */
	66	acpi_rs_memory32_range_stream, /* ACPI_RSTYPE_MEM32 */
	67	acpi_rs_fixed_memory32_stream, /* ACPI_RSTYPE_FIXED_MEM32 */
	68	acpi_rs_address16_stream, /* ACPI_RSTYPE_ADDRESS16 */
	69	acpi_rs_address32_stream, /* ACPI_RSTYPE_ADDRESS32 */
	70	acpi_rs_address64_stream, /* ACPI_RSTYPE_ADDRESS64 */
	71	acpi_rs_extended_irq_stream, /* ACPI_RSTYPE_EXT_IRQ */
	72	acpi_rs_generic_register_stream /* ACPI_RSTYPE_GENERIC_REG */
	73	};
	74
	75	/* Dispatch tables for convert-to-resource functions */
	76
	77	typedef
	78	acpi_status(ACPI_RESOURCE_HANDLER) (u8 byte_stream_buffer,
	79	acpi_size * bytes_consumed,
	80	u8 ** output_buffer,
	81	acpi_size * structure_size);
	82
	83	static ACPI_RESOURCE_HANDLER acpi_gbl_sm_resource_dispatch[] = {
	84	NULL, /* 0x00, Reserved */
	85	NULL, /* 0x01, Reserved */
	86	NULL, /* 0x02, Reserved */
	87	NULL, /* 0x03, Reserved */
	88	acpi_rs_irq_resource, /* ACPI_RDESC_TYPE_IRQ_FORMAT */
	89	acpi_rs_dma_resource, /* ACPI_RDESC_TYPE_DMA_FORMAT */
	90	acpi_rs_start_depend_fns_resource, /* ACPI_RDESC_TYPE_START_DEPENDENT */
	91	acpi_rs_end_depend_fns_resource, /* ACPI_RDESC_TYPE_END_DEPENDENT */
	92	acpi_rs_io_resource, /* ACPI_RDESC_TYPE_IO_PORT */
	93	acpi_rs_fixed_io_resource, /* ACPI_RDESC_TYPE_FIXED_IO_PORT */
	94	NULL, /* 0x0A, Reserved */
	95	NULL, /* 0x0B, Reserved */
	96	NULL, /* 0x0C, Reserved */
	97	NULL, /* 0x0D, Reserved */
	98	acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_SMALL_VENDOR */
	99	acpi_rs_end_tag_resource /* ACPI_RDESC_TYPE_END_TAG */
	100	};
	101
	102	static ACPI_RESOURCE_HANDLER acpi_gbl_lg_resource_dispatch[] = {
	103	NULL, /* 0x00, Reserved */
	104	acpi_rs_memory24_resource, /* ACPI_RDESC_TYPE_MEMORY_24 */
	105	acpi_rs_generic_register_resource, /* ACPI_RDESC_TYPE_GENERIC_REGISTER */
	106	NULL, /* 0x03, Reserved */
	107	acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_LARGE_VENDOR */
	108	acpi_rs_memory32_range_resource, /* ACPI_RDESC_TYPE_MEMORY_32 */
	109	acpi_rs_fixed_memory32_resource, /* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */
	110	acpi_rs_address32_resource, /* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */
	111	acpi_rs_address16_resource, /* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */
	112	acpi_rs_extended_irq_resource, /* ACPI_RDESC_TYPE_EXTENDED_XRUPT */
	113	acpi_rs_address64_resource, /* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */
114	acpi_rs_address64_resource /* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */
115	};
116
117	/* Local prototypes */
118
119	static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type);
120
1da177e4 LT	121	/*******************************************************************************
	122	*
	123	* FUNCTION: acpi_rs_get_resource_type
	124	*
bda663d3	125	* PARAMETERS: resource_type - Byte 0 of a resource descriptor
1da177e4	126	*
bda663d3 RM	127	* RETURN: The Resource Type with no extraneous bits (except the large/
bda663d3 RM	128	* small bit -- left alone)
1da177e4 LT	129	*
	130	* DESCRIPTION: Extract the Resource Type/Name from the first byte of
	131	* a resource descriptor.
	132	*
	133	******************************************************************************/
1da177e4	134
bda663d3 RM	135	u8 acpi_rs_get_resource_type(u8 resource_type)
bda663d3 RM	136	{
4be44fcd	137	ACPI_FUNCTION_ENTRY();
1da177e4	138
44f6c012 RM	139	/* Determine if this is a small or large resource */
44f6c012 RM	140
bda663d3 RM	141	if (resource_type & ACPI_RDESC_TYPE_LARGE) {
	142	/* Large Resource Type -- bits 6:0 contain the name */
	143
	144	return (resource_type);
	145	} else {
	146	/* Small Resource Type -- bits 6:3 contain the name */
	147
	148	return ((u8) (resource_type & ACPI_RDESC_SMALL_MASK));
	149	}
	150	}
	151
	152	/*******************************************************************************
	153	*
	154	* FUNCTION: acpi_rs_get_resource_handler
	155	*
	156	* PARAMETERS: resource_type - Byte 0 of a resource descriptor
	157	*
	158	* RETURN: Pointer to the resource conversion handler
	159	*
	160	* DESCRIPTION: Extract the Resource Type/Name from the first byte of
	161	* a resource descriptor.
	162	*
	163	******************************************************************************/
1da177e4	164
bda663d3 RM	165	static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
	166	{
	167	ACPI_FUNCTION_ENTRY();
44f6c012	168
bda663d3	169	/* Determine if this is a small or large resource */
1da177e4	170
bda663d3 RM	171	if (resource_type & ACPI_RDESC_TYPE_LARGE) {
bda663d3 RM	172	/* Large Resource Type -- bits 6:0 contain the name */
1da177e4	173
bda663d3 RM	174	if (resource_type > ACPI_RDESC_LARGE_MAX) {
	175	return (NULL);
	176	}
44f6c012	177
bda663d3 RM	178	return (acpi_gbl_lg_resource_dispatch[(resource_type &
	179	ACPI_RDESC_LARGE_MASK)]);
	180	} else {
	181	/* Small Resource Type -- bits 6:3 contain the name */
1da177e4	182
bda663d3 RM	183	return (acpi_gbl_sm_resource_dispatch[((resource_type &
	184	ACPI_RDESC_SMALL_MASK)
	185	>> 3)]);
1da177e4	186	}
1da177e4 LT	187	}
1da177e4 LT	188
1da177e4 LT	189	/*******************************************************************************
	190	*
	191	* FUNCTION: acpi_rs_byte_stream_to_list
	192	*
	193	* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
	194	* byte_stream_buffer_length - Length of byte_stream_buffer
	195	* output_buffer - Pointer to the buffer that will
	196	* contain the output structures
	197	*
	198	* RETURN: Status
	199	*
	200	* DESCRIPTION: Takes the resource byte stream and parses it, creating a
	201	* linked list of resources in the caller's output buffer
	202	*
	203	******************************************************************************/
	204
	205	acpi_status
4be44fcd LB	206	acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
4be44fcd LB	207	u32 byte_stream_buffer_length, u8 * output_buffer)
1da177e4	208	{
bda663d3	209	u8 *buffer = output_buffer;
4be44fcd LB	210	acpi_status status;
4be44fcd LB	211	acpi_size bytes_parsed = 0;
4be44fcd	212	acpi_size bytes_consumed = 0;
4be44fcd	213	acpi_size structure_size = 0;
4be44fcd	214	struct acpi_resource *resource;
bda663d3	215	ACPI_RESOURCE_HANDLER handler;
4be44fcd LB	216
	217	ACPI_FUNCTION_TRACE("rs_byte_stream_to_list");
	218
bda663d3 RM	219	/* Loop until end-of-buffer or an end_tag is found */
	220
	221	while (bytes_parsed < byte_stream_buffer_length) {
	222	/* Get the handler associated with this Descriptor Type */
	223
	224	handler = acpi_rs_get_resource_handler(*byte_stream_buffer);
	225	if (handler) {
	226	/* Convert a byte stream resource to local resource struct */
	227
	228	status = handler(byte_stream_buffer, &bytes_consumed,
	229	&buffer, &structure_size);
	230	} else {
	231	/* Invalid resource type */
	232
1da177e4	233	status = AE_AML_INVALID_RESOURCE_TYPE;
1da177e4 LT	234	}
1da177e4 LT	235
4be44fcd LB	236	if (ACPI_FAILURE(status)) {
4be44fcd LB	237	return_ACPI_STATUS(status);
1da177e4 LT	238	}
1da177e4 LT	239
bda663d3	240	/* Set the aligned length of the new resource descriptor */
44f6c012	241
bda663d3 RM	242	resource = ACPI_CAST_PTR(struct acpi_resource, buffer);
	243	resource->length =
	244	(u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length);
1da177e4	245
bda663d3	246	/* Normal exit on completion of an end_tag resource descriptor */
44f6c012	247
bda663d3 RM	248	if (acpi_rs_get_resource_type(*byte_stream_buffer) ==
	249	ACPI_RDESC_TYPE_END_TAG) {
	250	return_ACPI_STATUS(AE_OK);
	251	}
	252
	253	/* Update counter and point to the next input resource */
	254
	255	bytes_parsed += bytes_consumed;
1da177e4 LT	256	byte_stream_buffer += bytes_consumed;
1da177e4 LT	257
bda663d3	258	/* Point to the next structure in the output buffer */
44f6c012	259
4be44fcd	260	buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size);
44f6c012	261	}
1da177e4	262
bda663d3	263	/* Completed buffer, but did not find an end_tag resource descriptor */
1da177e4	264
bda663d3	265	return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
1da177e4 LT	266	}
1da177e4 LT	267
1da177e4 LT	268	/*******************************************************************************
	269	*
	270	* FUNCTION: acpi_rs_list_to_byte_stream
	271	*
bda663d3	272	* PARAMETERS: Resource - Pointer to the resource linked list
1da177e4 LT	273	* byte_steam_size_needed - Calculated size of the byte stream
	274	* needed from calling
	275	* acpi_rs_get_byte_stream_length()
	276	* The size of the output_buffer is
	277	* guaranteed to be >=
	278	* byte_stream_size_needed
	279	* output_buffer - Pointer to the buffer that will
	280	* contain the byte stream
	281	*
	282	* RETURN: Status
	283	*
	284	* DESCRIPTION: Takes the resource linked list and parses it, creating a
	285	* byte stream of resources in the caller's output buffer
	286	*
	287	******************************************************************************/
	288
	289	acpi_status
bda663d3	290	acpi_rs_list_to_byte_stream(struct acpi_resource *resource,
4be44fcd LB	291	acpi_size byte_stream_size_needed,
4be44fcd LB	292	u8 * output_buffer)
1da177e4	293	{
4be44fcd LB	294	u8 *buffer = output_buffer;
4be44fcd LB	295	acpi_size bytes_consumed = 0;
bda663d3	296	acpi_status status;
1da177e4	297
4be44fcd	298	ACPI_FUNCTION_TRACE("rs_list_to_byte_stream");
1da177e4	299
bda663d3	300	/* Convert each resource descriptor in the list */
1da177e4	301
bda663d3 RM	302	while (1) {
bda663d3 RM	303	/* Validate Type before dispatch */
44f6c012	304
bda663d3	305	if (resource->type > ACPI_RSTYPE_MAX) {
4be44fcd LB	306	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	307	"Invalid descriptor type (%X) in resource list\n",
bda663d3 RM	308	resource->type));
bda663d3 RM	309	return_ACPI_STATUS(AE_BAD_DATA);
44f6c012	310	}
1da177e4	311
bda663d3 RM	312	/* Perform the conversion, per resource type */
	313
	314	status = acpi_gbl_stream_dispatch[resource->type] (resource,
	315	&buffer,
	316	&bytes_consumed);
4be44fcd LB	317	if (ACPI_FAILURE(status)) {
4be44fcd LB	318	return_ACPI_STATUS(status);
1da177e4 LT	319	}
1da177e4 LT	320
bda663d3 RM	321	/* Check for end-of-list */
	322
	323	if (resource->type == ACPI_RSTYPE_END_TAG) {
	324	/* An End Tag indicates the end of the Resource Template */
	325
	326	return_ACPI_STATUS(AE_OK);
	327	}
	328
	329	/* Set the Buffer to point to the next (output) resource descriptor */
44f6c012	330
1da177e4 LT	331	buffer += bytes_consumed;
1da177e4 LT	332
bda663d3	333	/* Point to the next input resource object */
44f6c012	334
bda663d3 RM	335	resource = ACPI_PTR_ADD(struct acpi_resource,
bda663d3 RM	336	resource, resource->length);
1da177e4	337	}
1da177e4	338	}