Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbget - ACPI Table get* routines |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/actables.h> |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define _COMPONENT ACPI_TABLES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 48 | ACPI_MODULE_NAME("tbget") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 50 | /* Local prototypes */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | static acpi_status |
| 52 | acpi_tb_get_this_table(struct acpi_pointer *address, |
| 53 | struct acpi_table_header *header, |
| 54 | struct acpi_table_desc *table_info); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | |
| 56 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | acpi_tb_table_override(struct acpi_table_header *header, |
| 58 | struct acpi_table_desc *table_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /******************************************************************************* |
| 61 | * |
| 62 | * FUNCTION: acpi_tb_get_table |
| 63 | * |
| 64 | * PARAMETERS: Address - Address of table to retrieve. Can be |
| 65 | * Logical or Physical |
| 66 | * table_info - Where table info is returned |
| 67 | * |
| 68 | * RETURN: None |
| 69 | * |
| 70 | * DESCRIPTION: Get entire table of unknown size. |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | acpi_tb_get_table(struct acpi_pointer *address, |
| 76 | struct acpi_table_desc *table_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 78 | acpi_status status; |
| 79 | struct acpi_table_header header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | ACPI_FUNCTION_TRACE("tb_get_table"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 83 | /* Get the header in order to get signature and table size */ |
| 84 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | status = acpi_tb_get_table_header(address, &header); |
| 86 | if (ACPI_FAILURE(status)) { |
| 87 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | /* Get the entire table */ |
| 91 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | status = acpi_tb_get_table_body(address, &header, table_info); |
| 93 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 94 | ACPI_EXCEPTION((AE_INFO, status, |
| 95 | "Could not get ACPI table (size %X)", |
| 96 | header.length)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 97 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /******************************************************************************* |
| 104 | * |
| 105 | * FUNCTION: acpi_tb_get_table_header |
| 106 | * |
| 107 | * PARAMETERS: Address - Address of table to retrieve. Can be |
| 108 | * Logical or Physical |
| 109 | * return_header - Where the table header is returned |
| 110 | * |
| 111 | * RETURN: Status |
| 112 | * |
| 113 | * DESCRIPTION: Get an ACPI table header. Works in both physical or virtual |
| 114 | * addressing mode. Works with both physical or logical pointers. |
| 115 | * Table is either copied or mapped, depending on the pointer |
| 116 | * type and mode of the processor. |
| 117 | * |
| 118 | ******************************************************************************/ |
| 119 | |
| 120 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 121 | acpi_tb_get_table_header(struct acpi_pointer *address, |
| 122 | struct acpi_table_header *return_header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | acpi_status status = AE_OK; |
| 125 | struct acpi_table_header *header = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 127 | ACPI_FUNCTION_TRACE("tb_get_table_header"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 130 | * Flags contains the current processor mode (Virtual or Physical |
| 131 | * addressing) The pointer_type is either Logical or Physical |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | */ |
| 133 | switch (address->pointer_type) { |
| 134 | case ACPI_PHYSMODE_PHYSPTR: |
| 135 | case ACPI_LOGMODE_LOGPTR: |
| 136 | |
| 137 | /* Pointer matches processor mode, copy the header */ |
| 138 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | ACPI_MEMCPY(return_header, address->pointer.logical, |
| 140 | sizeof(struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | break; |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | case ACPI_LOGMODE_PHYSPTR: |
| 144 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 145 | /* Create a logical address for the physical pointer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | status = acpi_os_map_memory(address->pointer.physical, |
| 148 | sizeof(struct acpi_table_header), |
| 149 | (void *)&header); |
| 150 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 151 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | /* Copy header and delete mapping */ |
| 155 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | ACPI_MEMCPY(return_header, header, |
| 157 | sizeof(struct acpi_table_header)); |
| 158 | acpi_os_unmap_memory(header, sizeof(struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | break; |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | default: |
| 162 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 163 | ACPI_ERROR((AE_INFO, "Invalid address flags %X", |
| 164 | address->pointer_type)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } |
| 167 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 168 | ACPI_DEBUG_PRINT((ACPI_DB_TABLES, "Table Signature: [%4.4s]\n", |
| 169 | return_header->signature)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 171 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /******************************************************************************* |
| 175 | * |
| 176 | * FUNCTION: acpi_tb_get_table_body |
| 177 | * |
| 178 | * PARAMETERS: Address - Address of table to retrieve. Can be |
| 179 | * Logical or Physical |
| 180 | * Header - Header of the table to retrieve |
| 181 | * table_info - Where the table info is returned |
| 182 | * |
| 183 | * RETURN: Status |
| 184 | * |
| 185 | * DESCRIPTION: Get an entire ACPI table with support to allow the host OS to |
| 186 | * replace the table with a newer version (table override.) |
| 187 | * Works in both physical or virtual |
| 188 | * addressing mode. Works with both physical or logical pointers. |
| 189 | * Table is either copied or mapped, depending on the pointer |
| 190 | * type and mode of the processor. |
| 191 | * |
| 192 | ******************************************************************************/ |
| 193 | |
| 194 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 195 | acpi_tb_get_table_body(struct acpi_pointer *address, |
| 196 | struct acpi_table_header *header, |
| 197 | struct acpi_table_desc *table_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | ACPI_FUNCTION_TRACE("tb_get_table_body"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | if (!table_info || !address) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 204 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | } |
| 206 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 207 | /* Attempt table override. */ |
| 208 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 209 | status = acpi_tb_table_override(header, table_info); |
| 210 | if (ACPI_SUCCESS(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | /* Table was overridden by the host OS */ |
| 212 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | /* No override, get the original table */ |
| 217 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 218 | status = acpi_tb_get_this_table(address, header, table_info); |
| 219 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /******************************************************************************* |
| 223 | * |
| 224 | * FUNCTION: acpi_tb_table_override |
| 225 | * |
| 226 | * PARAMETERS: Header - Pointer to table header |
| 227 | * table_info - Return info if table is overridden |
| 228 | * |
| 229 | * RETURN: None |
| 230 | * |
| 231 | * DESCRIPTION: Attempts override of current table with a new one if provided |
| 232 | * by the host OS. |
| 233 | * |
| 234 | ******************************************************************************/ |
| 235 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 236 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | acpi_tb_table_override(struct acpi_table_header *header, |
| 238 | struct acpi_table_desc *table_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 240 | struct acpi_table_header *new_table; |
| 241 | acpi_status status; |
| 242 | struct acpi_pointer address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | ACPI_FUNCTION_TRACE("tb_table_override"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * The OSL will examine the header and decide whether to override this |
| 248 | * table. If it decides to override, a table will be returned in new_table, |
| 249 | * which we will then copy. |
| 250 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 251 | status = acpi_os_table_override(header, &new_table); |
| 252 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* Some severe error from the OSL, but we basically ignore it */ |
| 254 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 255 | ACPI_EXCEPTION((AE_INFO, status, |
| 256 | "Could not override ACPI table")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 257 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | if (!new_table) { |
| 261 | /* No table override */ |
| 262 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 263 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | /* |
| 267 | * We have a new table to override the old one. Get a copy of |
| 268 | * the new one. We know that the new table has a logical pointer. |
| 269 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 270 | address.pointer_type = ACPI_LOGICAL_POINTER | ACPI_LOGICAL_ADDRESSING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | address.pointer.logical = new_table; |
| 272 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 273 | status = acpi_tb_get_this_table(&address, new_table, table_info); |
| 274 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 275 | ACPI_EXCEPTION((AE_INFO, status, "Could not copy ACPI table")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 276 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | /* Copy the table info */ |
| 280 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 281 | ACPI_INFO((AE_INFO, "Table [%4.4s] replaced by host OS", |
| 282 | table_info->pointer->signature)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 284 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /******************************************************************************* |
| 288 | * |
| 289 | * FUNCTION: acpi_tb_get_this_table |
| 290 | * |
| 291 | * PARAMETERS: Address - Address of table to retrieve. Can be |
| 292 | * Logical or Physical |
| 293 | * Header - Header of the table to retrieve |
| 294 | * table_info - Where the table info is returned |
| 295 | * |
| 296 | * RETURN: Status |
| 297 | * |
| 298 | * DESCRIPTION: Get an entire ACPI table. Works in both physical or virtual |
| 299 | * addressing mode. Works with both physical or logical pointers. |
| 300 | * Table is either copied or mapped, depending on the pointer |
| 301 | * type and mode of the processor. |
| 302 | * |
| 303 | ******************************************************************************/ |
| 304 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 305 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 306 | acpi_tb_get_this_table(struct acpi_pointer *address, |
| 307 | struct acpi_table_header *header, |
| 308 | struct acpi_table_desc *table_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 310 | struct acpi_table_header *full_table = NULL; |
| 311 | u8 allocation; |
| 312 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 314 | ACPI_FUNCTION_TRACE("tb_get_this_table"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 317 | * Flags contains the current processor mode (Virtual or Physical |
| 318 | * addressing) The pointer_type is either Logical or Physical |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | */ |
| 320 | switch (address->pointer_type) { |
| 321 | case ACPI_PHYSMODE_PHYSPTR: |
| 322 | case ACPI_LOGMODE_LOGPTR: |
| 323 | |
| 324 | /* Pointer matches processor mode, copy the table to a new buffer */ |
| 325 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 326 | full_table = ACPI_MEM_ALLOCATE(header->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | if (!full_table) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 328 | ACPI_ERROR((AE_INFO, |
| 329 | "Could not allocate table memory for [%4.4s] length %X", |
| 330 | header->signature, header->length)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 331 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | /* Copy the entire table (including header) to the local buffer */ |
| 335 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 336 | ACPI_MEMCPY(full_table, address->pointer.logical, |
| 337 | header->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | /* Save allocation type */ |
| 340 | |
| 341 | allocation = ACPI_MEM_ALLOCATED; |
| 342 | break; |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | case ACPI_LOGMODE_PHYSPTR: |
| 345 | |
| 346 | /* |
| 347 | * Just map the table's physical memory |
| 348 | * into our address space. |
| 349 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 350 | status = acpi_os_map_memory(address->pointer.physical, |
| 351 | (acpi_size) header->length, |
| 352 | (void *)&full_table); |
| 353 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 354 | ACPI_ERROR((AE_INFO, |
| 355 | "Could not map memory for table [%4.4s] at %8.8X%8.8X for length %X", |
| 356 | header->signature, |
| 357 | ACPI_FORMAT_UINT64(address->pointer. |
| 358 | physical), |
| 359 | header->length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | return (status); |
| 361 | } |
| 362 | |
| 363 | /* Save allocation type */ |
| 364 | |
| 365 | allocation = ACPI_MEM_MAPPED; |
| 366 | break; |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | default: |
| 369 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 370 | ACPI_ERROR((AE_INFO, "Invalid address flags %X", |
| 371 | address->pointer_type)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 372 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Validate checksum for _most_ tables, |
| 377 | * even the ones whose signature we don't recognize |
| 378 | */ |
| 379 | if (table_info->type != ACPI_TABLE_FACS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 380 | status = acpi_tb_verify_table_checksum(full_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | #if (!ACPI_CHECKSUM_ABORT) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 383 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* Ignore the error if configuration says so */ |
| 385 | |
| 386 | status = AE_OK; |
| 387 | } |
| 388 | #endif |
| 389 | } |
| 390 | |
| 391 | /* Return values */ |
| 392 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 393 | table_info->pointer = full_table; |
| 394 | table_info->length = (acpi_size) header->length; |
| 395 | table_info->allocation = allocation; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 397 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 398 | "Found table [%4.4s] at %8.8X%8.8X, mapped/copied to %p\n", |
| 399 | full_table->signature, |
| 400 | ACPI_FORMAT_UINT64(address->pointer.physical), |
| 401 | full_table)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 403 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | /******************************************************************************* |
| 407 | * |
| 408 | * FUNCTION: acpi_tb_get_table_ptr |
| 409 | * |
| 410 | * PARAMETERS: table_type - one of the defined table types |
| 411 | * Instance - Which table of this type |
| 412 | * table_ptr_loc - pointer to location to place the pointer for |
| 413 | * return |
| 414 | * |
| 415 | * RETURN: Status |
| 416 | * |
| 417 | * DESCRIPTION: This function is called to get the pointer to an ACPI table. |
| 418 | * |
| 419 | ******************************************************************************/ |
| 420 | |
| 421 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 422 | acpi_tb_get_table_ptr(acpi_table_type table_type, |
| 423 | u32 instance, struct acpi_table_header **table_ptr_loc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 425 | struct acpi_table_desc *table_desc; |
| 426 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 428 | ACPI_FUNCTION_TRACE("tb_get_table_ptr"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | if (!acpi_gbl_DSDT) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | if (table_type > ACPI_TABLE_MAX) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 435 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | /* |
| 439 | * For all table types (Single/Multiple), the first |
| 440 | * instance is always in the list head. |
| 441 | */ |
| 442 | if (instance == 1) { |
| 443 | /* Get the first */ |
| 444 | |
| 445 | *table_ptr_loc = NULL; |
| 446 | if (acpi_gbl_table_lists[table_type].next) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 447 | *table_ptr_loc = |
| 448 | acpi_gbl_table_lists[table_type].next->pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 453 | /* Check for instance out of range */ |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | if (instance > acpi_gbl_table_lists[table_type].count) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 456 | return_ACPI_STATUS(AE_NOT_EXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /* Walk the list to get the desired table |
| 460 | * Since the if (Instance == 1) check above checked for the |
| 461 | * first table, setting table_desc equal to the .Next member |
| 462 | * is actually pointing to the second table. Therefore, we |
| 463 | * need to walk from the 2nd table until we reach the Instance |
| 464 | * that the user is looking for and return its table pointer. |
| 465 | */ |
| 466 | table_desc = acpi_gbl_table_lists[table_type].next; |
| 467 | for (i = 2; i < instance; i++) { |
| 468 | table_desc = table_desc->next; |
| 469 | } |
| 470 | |
| 471 | /* We are now pointing to the requested table's descriptor */ |
| 472 | |
| 473 | *table_ptr_loc = table_desc->pointer; |
| 474 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 475 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |