Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbfind - find table |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Len Brown | 75a44ce | 2008-04-23 23:00:13 -0400 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 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, |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 68 | char *oem_id, char *oem_table_id, u32 *table_index) |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 69 | { |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 70 | u32 i; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 71 | acpi_status status; |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 72 | struct acpi_table_header header; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 73 | |
| 74 | ACPI_FUNCTION_TRACE(tb_find_table); |
| 75 | |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 76 | /* Normalize the input strings */ |
| 77 | |
| 78 | ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header)); |
| 79 | ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE); |
| 80 | ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE); |
| 81 | ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE); |
| 82 | |
| 83 | /* Search for the table */ |
| 84 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 85 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
| 86 | if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature), |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 87 | header.signature, ACPI_NAME_SIZE)) { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 88 | |
| 89 | /* Not the requested table */ |
| 90 | |
| 91 | continue; |
| 92 | } |
| 93 | |
| 94 | /* Table with matching signature has been found */ |
| 95 | |
| 96 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
| 97 | |
| 98 | /* Table is not currently mapped, map it */ |
| 99 | |
| 100 | status = |
| 101 | acpi_tb_verify_table(&acpi_gbl_root_table_list. |
| 102 | tables[i]); |
| 103 | if (ACPI_FAILURE(status)) { |
| 104 | return_ACPI_STATUS(status); |
| 105 | } |
| 106 | |
| 107 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
| 108 | continue; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /* Check for table match on all IDs */ |
| 113 | |
| 114 | if (!ACPI_MEMCMP |
| 115 | (acpi_gbl_root_table_list.tables[i].pointer->signature, |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 116 | header.signature, ACPI_NAME_SIZE) && (!oem_id[0] |
| 117 | || |
| 118 | !ACPI_MEMCMP |
| 119 | (acpi_gbl_root_table_list. |
| 120 | tables[i].pointer-> |
| 121 | oem_id, |
| 122 | header.oem_id, |
| 123 | ACPI_OEM_ID_SIZE)) |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 124 | && (!oem_table_id[0] |
| 125 | || !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i]. |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 126 | pointer->oem_table_id, |
| 127 | header.oem_table_id, |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 128 | ACPI_OEM_TABLE_ID_SIZE))) { |
| 129 | *table_index = i; |
| 130 | |
| 131 | ACPI_DEBUG_PRINT((ACPI_DB_TABLES, |
Lin Ming | 47c0872 | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 132 | "Found table [%4.4s]\n", |
| 133 | header.signature)); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 134 | return_ACPI_STATUS(AE_OK); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | return_ACPI_STATUS(AE_NOT_FOUND); |
| 139 | } |