[deliverable/linux.git] / drivers / acpi / tables / tbfind.c

/******************************************************************************
 *
 * Module Name: tbfind   - find table
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2008, Intel Corp.
 * 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/actables.h>

#define _COMPONENT          ACPI_TABLES
ACPI_MODULE_NAME("tbfind")

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_find_table
 *
 * PARAMETERS:  Signature           - String with ACPI table signature
 *              oem_id              - String with the table OEM ID
 *              oem_table_id        - String with the OEM Table ID
 *              table_index         - Where the table index is returned
 *
 * RETURN:      Status and table index
 *
 * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
 *              Signature, OEM ID and OEM Table ID. Returns an index that can
 *              be used to get the table header or entire table.
 *
 ******************************************************************************/
acpi_status
acpi_tb_find_table(char *signature,
		   char *oem_id,
		   char *oem_table_id, acpi_native_uint * table_index)
{
	acpi_native_uint i;
	acpi_status status;
	struct acpi_table_header header;

	ACPI_FUNCTION_TRACE(tb_find_table);

	/* Normalize the input strings */

	ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header));
	ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE);
	ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
	ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);

	/* Search for the table */

	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
		if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
				header.signature, ACPI_NAME_SIZE)) {

			/* Not the requested table */

			continue;
		}

		/* Table with matching signature has been found */

		if (!acpi_gbl_root_table_list.tables[i].pointer) {

			/* Table is not currently mapped, map it */

			status =
			    acpi_tb_verify_table(&acpi_gbl_root_table_list.
						 tables[i]);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}

			if (!acpi_gbl_root_table_list.tables[i].pointer) {
				continue;
			}
		}

		/* Check for table match on all IDs */

		if (!ACPI_MEMCMP
		    (acpi_gbl_root_table_list.tables[i].pointer->signature,
		     header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
							   ||
							   !ACPI_MEMCMP
							   (acpi_gbl_root_table_list.
							    tables[i].pointer->
							    oem_id,
							    header.oem_id,
							    ACPI_OEM_ID_SIZE))
		    && (!oem_table_id[0]
			|| !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i].
					pointer->oem_table_id,
					header.oem_table_id,
					ACPI_OEM_TABLE_ID_SIZE))) {
			*table_index = i;

			ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
					  "Found table [%4.4s]\n",
					  header.signature));
			return_ACPI_STATUS(AE_OK);
		}
	}

	return_ACPI_STATUS(AE_NOT_FOUND);
}
Commit	Line	Data
f3d2e786 BM	1	/******************************************************************************
	2	*
	3	* Module Name: tbfind - find table
	4	*
	5	*****************************************************************************/
	6
	7	/*
75a44ce0	8	* Copyright (C) 2000 - 2008, Intel Corp.
f3d2e786 BM	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
	44	#include <acpi/acpi.h>
	45	#include <acpi/actables.h>
	46
	47	#define _COMPONENT ACPI_TABLES
	48	ACPI_MODULE_NAME("tbfind")
	49
	50	/*******************************************************************************
	51	*
	52	* FUNCTION: acpi_tb_find_table
	53	*
	54	* PARAMETERS: Signature - String with ACPI table signature
	55	* oem_id - String with the table OEM ID
	56	* oem_table_id - String with the OEM Table ID
	57	* table_index - Where the table index is returned
	58	*
	59	* RETURN: Status and table index
	60	*
	61	* DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
	62	* Signature, OEM ID and OEM Table ID. Returns an index that can
	63	* be used to get the table header or entire table.
	64	*
	65	******************************************************************************/
	66	acpi_status
	67	acpi_tb_find_table(char *signature,
	68	char *oem_id,
	69	char oem_table_id, acpi_native_uint table_index)
	70	{
	71	acpi_native_uint i;
	72	acpi_status status;
47c08729	73	struct acpi_table_header header;
f3d2e786 BM	74
	75	ACPI_FUNCTION_TRACE(tb_find_table);
	76
47c08729 LM	77	/* Normalize the input strings */
	78
	79	ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header));
	80	ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE);
	81	ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
	82	ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
	83
	84	/* Search for the table */
	85
f3d2e786 BM	86	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
f3d2e786 BM	87	if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
47c08729	88	header.signature, ACPI_NAME_SIZE)) {
f3d2e786 BM	89
	90	/* Not the requested table */
	91
	92	continue;
	93	}
	94
	95	/* Table with matching signature has been found */
	96
	97	if (!acpi_gbl_root_table_list.tables[i].pointer) {
	98
	99	/* Table is not currently mapped, map it */
	100
	101	status =
	102	acpi_tb_verify_table(&acpi_gbl_root_table_list.
	103	tables[i]);
	104	if (ACPI_FAILURE(status)) {
	105	return_ACPI_STATUS(status);
	106	}
	107
	108	if (!acpi_gbl_root_table_list.tables[i].pointer) {
	109	continue;
	110	}
	111	}
	112
	113	/* Check for table match on all IDs */
	114
	115	if (!ACPI_MEMCMP
	116	(acpi_gbl_root_table_list.tables[i].pointer->signature,
47c08729 LM	117	header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
	118	\|\|
	119	!ACPI_MEMCMP
	120	(acpi_gbl_root_table_list.
	121	tables[i].pointer->
	122	oem_id,
	123	header.oem_id,
	124	ACPI_OEM_ID_SIZE))
f3d2e786 BM	125	&& (!oem_table_id[0]
f3d2e786 BM	126	\|\| !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i].
47c08729 LM	127	pointer->oem_table_id,
47c08729 LM	128	header.oem_table_id,
f3d2e786 BM	129	ACPI_OEM_TABLE_ID_SIZE))) {
	130	*table_index = i;
	131
	132	ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
47c08729 LM	133	"Found table [%4.4s]\n",
47c08729 LM	134	header.signature));
f3d2e786 BM	135	return_ACPI_STATUS(AE_OK);
	136	}
	137	}
	138
	139	return_ACPI_STATUS(AE_NOT_FOUND);
	140	}