/****************************************************************************** * * 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 "accommon.h" #include "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, u32 *table_index) { u32 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); }