Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbinstal - ACPI table installation and removal |
| 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 | |
| 44 | |
| 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/actables.h> |
| 47 | |
| 48 | |
| 49 | #define _COMPONENT ACPI_TABLES |
| 50 | ACPI_MODULE_NAME ("tbinstal") |
| 51 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 52 | /* Local prototypes */ |
| 53 | |
| 54 | static acpi_status |
| 55 | acpi_tb_match_signature ( |
| 56 | char *signature, |
| 57 | struct acpi_table_desc *table_info, |
| 58 | u8 search_type); |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | /******************************************************************************* |
| 62 | * |
| 63 | * FUNCTION: acpi_tb_match_signature |
| 64 | * |
| 65 | * PARAMETERS: Signature - Table signature to match |
| 66 | * table_info - Return data |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 67 | * search_type - Table type to match (primary/secondary) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | * |
| 69 | * RETURN: Status |
| 70 | * |
| 71 | * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned" |
| 72 | * tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match. |
| 73 | * |
| 74 | ******************************************************************************/ |
| 75 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 76 | static acpi_status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | acpi_tb_match_signature ( |
| 78 | char *signature, |
| 79 | struct acpi_table_desc *table_info, |
| 80 | u8 search_type) |
| 81 | { |
| 82 | acpi_native_uint i; |
| 83 | |
| 84 | |
| 85 | ACPI_FUNCTION_TRACE ("tb_match_signature"); |
| 86 | |
| 87 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 88 | /* Search for a signature match among the known table types */ |
| 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) { |
| 91 | if (!(acpi_gbl_table_data[i].flags & search_type)) { |
| 92 | continue; |
| 93 | } |
| 94 | |
| 95 | if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature, |
| 96 | acpi_gbl_table_data[i].sig_length)) { |
| 97 | /* Found a signature match, return index if requested */ |
| 98 | |
| 99 | if (table_info) { |
| 100 | table_info->type = (u8) i; |
| 101 | } |
| 102 | |
| 103 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 104 | "Table [%4.4s] is an ACPI table consumed by the core subsystem\n", |
| 105 | (char *) acpi_gbl_table_data[i].signature)); |
| 106 | |
| 107 | return_ACPI_STATUS (AE_OK); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| 112 | "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n", |
| 113 | (char *) signature)); |
| 114 | |
| 115 | return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED); |
| 116 | } |
| 117 | |
| 118 | |
| 119 | /******************************************************************************* |
| 120 | * |
| 121 | * FUNCTION: acpi_tb_install_table |
| 122 | * |
| 123 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body |
| 124 | * |
| 125 | * RETURN: Status |
| 126 | * |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 127 | * DESCRIPTION: Install the table into the global data structures. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | * |
| 129 | ******************************************************************************/ |
| 130 | |
| 131 | acpi_status |
| 132 | acpi_tb_install_table ( |
| 133 | struct acpi_table_desc *table_info) |
| 134 | { |
| 135 | acpi_status status; |
| 136 | |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | ACPI_FUNCTION_TRACE ("tb_install_table"); |
| 139 | |
| 140 | |
| 141 | /* Lock tables while installing */ |
| 142 | |
| 143 | status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES); |
| 144 | if (ACPI_FAILURE (status)) { |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 145 | ACPI_REPORT_ERROR (("Could not acquire table mutex, %s\n", |
| 146 | acpi_format_exception (status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | return_ACPI_STATUS (status); |
| 148 | } |
| 149 | |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 150 | /* |
| 151 | * Ignore a table that is already installed. For example, some BIOS |
| 152 | * ASL code will repeatedly attempt to load the same SSDT. |
| 153 | */ |
| 154 | status = acpi_tb_is_table_installed (table_info); |
| 155 | if (ACPI_FAILURE (status)) { |
| 156 | goto unlock_and_exit; |
| 157 | } |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | /* Install the table into the global data structure */ |
| 160 | |
| 161 | status = acpi_tb_init_table_descriptor (table_info->type, table_info); |
| 162 | if (ACPI_FAILURE (status)) { |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 163 | ACPI_REPORT_ERROR (("Could not install table [%4.4s], %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | table_info->pointer->signature, acpi_format_exception (status))); |
| 165 | } |
| 166 | |
| 167 | ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n", |
| 168 | acpi_gbl_table_data[table_info->type].name, table_info->pointer)); |
| 169 | |
Robert Moore | 0c9938c | 2005-07-29 15:15:00 -0700 | [diff] [blame^] | 170 | |
| 171 | unlock_and_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); |
| 173 | return_ACPI_STATUS (status); |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /******************************************************************************* |
| 178 | * |
| 179 | * FUNCTION: acpi_tb_recognize_table |
| 180 | * |
| 181 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 182 | * search_type - Table type to match (primary/secondary) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | * |
| 184 | * RETURN: Status |
| 185 | * |
| 186 | * DESCRIPTION: Check a table signature for a match against known table types |
| 187 | * |
| 188 | * NOTE: All table pointers are validated as follows: |
| 189 | * 1) Table pointer must point to valid physical memory |
| 190 | * 2) Signature must be 4 ASCII chars, even if we don't recognize the |
| 191 | * name |
| 192 | * 3) Table must be readable for length specified in the header |
| 193 | * 4) Table checksum must be valid (with the exception of the FACS |
| 194 | * which has no checksum for some odd reason) |
| 195 | * |
| 196 | ******************************************************************************/ |
| 197 | |
| 198 | acpi_status |
| 199 | acpi_tb_recognize_table ( |
| 200 | struct acpi_table_desc *table_info, |
| 201 | u8 search_type) |
| 202 | { |
| 203 | struct acpi_table_header *table_header; |
| 204 | acpi_status status; |
| 205 | |
| 206 | |
| 207 | ACPI_FUNCTION_TRACE ("tb_recognize_table"); |
| 208 | |
| 209 | |
| 210 | /* Ensure that we have a valid table pointer */ |
| 211 | |
| 212 | table_header = (struct acpi_table_header *) table_info->pointer; |
| 213 | if (!table_header) { |
| 214 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * We only "recognize" a limited number of ACPI tables -- namely, the |
| 219 | * ones that are used by the subsystem (DSDT, FADT, etc.) |
| 220 | * |
| 221 | * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized. |
| 222 | * This can be any one of many valid ACPI tables, it just isn't one of |
| 223 | * the tables that is consumed by the core subsystem |
| 224 | */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 225 | status = acpi_tb_match_signature (table_header->signature, |
| 226 | table_info, search_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | if (ACPI_FAILURE (status)) { |
| 228 | return_ACPI_STATUS (status); |
| 229 | } |
| 230 | |
| 231 | status = acpi_tb_validate_table_header (table_header); |
| 232 | if (ACPI_FAILURE (status)) { |
| 233 | return_ACPI_STATUS (status); |
| 234 | } |
| 235 | |
| 236 | /* Return the table type and length via the info struct */ |
| 237 | |
| 238 | table_info->length = (acpi_size) table_header->length; |
| 239 | |
| 240 | return_ACPI_STATUS (status); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | /******************************************************************************* |
| 245 | * |
| 246 | * FUNCTION: acpi_tb_init_table_descriptor |
| 247 | * |
| 248 | * PARAMETERS: table_type - The type of the table |
| 249 | * table_info - A table info struct |
| 250 | * |
| 251 | * RETURN: None. |
| 252 | * |
| 253 | * DESCRIPTION: Install a table into the global data structs. |
| 254 | * |
| 255 | ******************************************************************************/ |
| 256 | |
| 257 | acpi_status |
| 258 | acpi_tb_init_table_descriptor ( |
| 259 | acpi_table_type table_type, |
| 260 | struct acpi_table_desc *table_info) |
| 261 | { |
| 262 | struct acpi_table_list *list_head; |
| 263 | struct acpi_table_desc *table_desc; |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 264 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | |
| 267 | ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type); |
| 268 | |
| 269 | |
| 270 | /* Allocate a descriptor for this table */ |
| 271 | |
| 272 | table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc)); |
| 273 | if (!table_desc) { |
| 274 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 275 | } |
| 276 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 277 | /* Get a new owner ID for the table */ |
| 278 | |
| 279 | status = acpi_ut_allocate_owner_id (&table_desc->owner_id); |
| 280 | if (ACPI_FAILURE (status)) { |
| 281 | return_ACPI_STATUS (status); |
| 282 | } |
| 283 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 284 | /* Install the table into the global data structure */ |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | list_head = &acpi_gbl_table_lists[table_type]; |
| 287 | |
| 288 | /* |
| 289 | * Two major types of tables: 1) Only one instance is allowed. This |
| 290 | * includes most ACPI tables such as the DSDT. 2) Multiple instances of |
| 291 | * the table are allowed. This includes SSDT and PSDTs. |
| 292 | */ |
| 293 | if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) { |
| 294 | /* |
| 295 | * Only one table allowed, and a table has alread been installed |
| 296 | * at this location, so return an error. |
| 297 | */ |
| 298 | if (list_head->next) { |
| 299 | ACPI_MEM_FREE (table_desc); |
| 300 | return_ACPI_STATUS (AE_ALREADY_EXISTS); |
| 301 | } |
| 302 | |
| 303 | table_desc->next = list_head->next; |
| 304 | list_head->next = table_desc; |
| 305 | |
| 306 | if (table_desc->next) { |
| 307 | table_desc->next->prev = table_desc; |
| 308 | } |
| 309 | |
| 310 | list_head->count++; |
| 311 | } |
| 312 | else { |
| 313 | /* |
| 314 | * Link the new table in to the list of tables of this type. |
| 315 | * Insert at the end of the list, order IS IMPORTANT. |
| 316 | * |
| 317 | * table_desc->Prev & Next are already NULL from calloc() |
| 318 | */ |
| 319 | list_head->count++; |
| 320 | |
| 321 | if (!list_head->next) { |
| 322 | list_head->next = table_desc; |
| 323 | } |
| 324 | else { |
| 325 | table_desc->next = list_head->next; |
| 326 | |
| 327 | while (table_desc->next->next) { |
| 328 | table_desc->next = table_desc->next->next; |
| 329 | } |
| 330 | |
| 331 | table_desc->next->next = table_desc; |
| 332 | table_desc->prev = table_desc->next; |
| 333 | table_desc->next = NULL; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | /* Finish initialization of the table descriptor */ |
| 338 | |
| 339 | table_desc->type = (u8) table_type; |
| 340 | table_desc->pointer = table_info->pointer; |
| 341 | table_desc->length = table_info->length; |
| 342 | table_desc->allocation = table_info->allocation; |
| 343 | table_desc->aml_start = (u8 *) (table_desc->pointer + 1), |
| 344 | table_desc->aml_length = (u32) (table_desc->length - |
| 345 | (u32) sizeof (struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | table_desc->loaded_into_namespace = FALSE; |
| 347 | |
| 348 | /* |
| 349 | * Set the appropriate global pointer (if there is one) to point to the |
| 350 | * newly installed table |
| 351 | */ |
| 352 | if (acpi_gbl_table_data[table_type].global_ptr) { |
| 353 | *(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer; |
| 354 | } |
| 355 | |
| 356 | /* Return Data */ |
| 357 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 358 | table_info->owner_id = table_desc->owner_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | table_info->installed_desc = table_desc; |
| 360 | |
| 361 | return_ACPI_STATUS (AE_OK); |
| 362 | } |
| 363 | |
| 364 | |
| 365 | /******************************************************************************* |
| 366 | * |
| 367 | * FUNCTION: acpi_tb_delete_all_tables |
| 368 | * |
| 369 | * PARAMETERS: None. |
| 370 | * |
| 371 | * RETURN: None. |
| 372 | * |
| 373 | * DESCRIPTION: Delete all internal ACPI tables |
| 374 | * |
| 375 | ******************************************************************************/ |
| 376 | |
| 377 | void |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 378 | acpi_tb_delete_all_tables ( |
| 379 | void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
| 381 | acpi_table_type type; |
| 382 | |
| 383 | |
| 384 | /* |
| 385 | * Free memory allocated for ACPI tables |
| 386 | * Memory can either be mapped or allocated |
| 387 | */ |
| 388 | for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) { |
| 389 | acpi_tb_delete_tables_by_type (type); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | |
| 394 | /******************************************************************************* |
| 395 | * |
| 396 | * FUNCTION: acpi_tb_delete_tables_by_type |
| 397 | * |
| 398 | * PARAMETERS: Type - The table type to be deleted |
| 399 | * |
| 400 | * RETURN: None. |
| 401 | * |
| 402 | * DESCRIPTION: Delete an internal ACPI table |
| 403 | * Locks the ACPI table mutex |
| 404 | * |
| 405 | ******************************************************************************/ |
| 406 | |
| 407 | void |
| 408 | acpi_tb_delete_tables_by_type ( |
| 409 | acpi_table_type type) |
| 410 | { |
| 411 | struct acpi_table_desc *table_desc; |
| 412 | u32 count; |
| 413 | u32 i; |
| 414 | |
| 415 | |
| 416 | ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type); |
| 417 | |
| 418 | |
| 419 | if (type > ACPI_TABLE_MAX) { |
| 420 | return_VOID; |
| 421 | } |
| 422 | |
| 423 | if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) { |
| 424 | return; |
| 425 | } |
| 426 | |
| 427 | /* Clear the appropriate "typed" global table pointer */ |
| 428 | |
| 429 | switch (type) { |
| 430 | case ACPI_TABLE_RSDP: |
| 431 | acpi_gbl_RSDP = NULL; |
| 432 | break; |
| 433 | |
| 434 | case ACPI_TABLE_DSDT: |
| 435 | acpi_gbl_DSDT = NULL; |
| 436 | break; |
| 437 | |
| 438 | case ACPI_TABLE_FADT: |
| 439 | acpi_gbl_FADT = NULL; |
| 440 | break; |
| 441 | |
| 442 | case ACPI_TABLE_FACS: |
| 443 | acpi_gbl_FACS = NULL; |
| 444 | break; |
| 445 | |
| 446 | case ACPI_TABLE_XSDT: |
| 447 | acpi_gbl_XSDT = NULL; |
| 448 | break; |
| 449 | |
| 450 | case ACPI_TABLE_SSDT: |
| 451 | case ACPI_TABLE_PSDT: |
| 452 | default: |
| 453 | break; |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Free the table |
| 458 | * 1) Get the head of the list |
| 459 | */ |
| 460 | table_desc = acpi_gbl_table_lists[type].next; |
| 461 | count = acpi_gbl_table_lists[type].count; |
| 462 | |
| 463 | /* |
| 464 | * 2) Walk the entire list, deleting both the allocated tables |
| 465 | * and the table descriptors |
| 466 | */ |
| 467 | for (i = 0; i < count; i++) { |
| 468 | table_desc = acpi_tb_uninstall_table (table_desc); |
| 469 | } |
| 470 | |
| 471 | (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); |
| 472 | return_VOID; |
| 473 | } |
| 474 | |
| 475 | |
| 476 | /******************************************************************************* |
| 477 | * |
| 478 | * FUNCTION: acpi_tb_delete_single_table |
| 479 | * |
| 480 | * PARAMETERS: table_info - A table info struct |
| 481 | * |
| 482 | * RETURN: None. |
| 483 | * |
| 484 | * DESCRIPTION: Low-level free for a single ACPI table. Handles cases where |
| 485 | * the table was allocated a buffer or was mapped. |
| 486 | * |
| 487 | ******************************************************************************/ |
| 488 | |
| 489 | void |
| 490 | acpi_tb_delete_single_table ( |
| 491 | struct acpi_table_desc *table_desc) |
| 492 | { |
| 493 | |
| 494 | /* Must have a valid table descriptor and pointer */ |
| 495 | |
| 496 | if ((!table_desc) || |
| 497 | (!table_desc->pointer)) { |
| 498 | return; |
| 499 | } |
| 500 | |
| 501 | /* Valid table, determine type of memory allocation */ |
| 502 | |
| 503 | switch (table_desc->allocation) { |
| 504 | case ACPI_MEM_NOT_ALLOCATED: |
| 505 | break; |
| 506 | |
| 507 | case ACPI_MEM_ALLOCATED: |
| 508 | |
| 509 | ACPI_MEM_FREE (table_desc->pointer); |
| 510 | break; |
| 511 | |
| 512 | case ACPI_MEM_MAPPED: |
| 513 | |
| 514 | acpi_os_unmap_memory (table_desc->pointer, table_desc->length); |
| 515 | break; |
| 516 | |
| 517 | default: |
| 518 | break; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | |
| 523 | /******************************************************************************* |
| 524 | * |
| 525 | * FUNCTION: acpi_tb_uninstall_table |
| 526 | * |
| 527 | * PARAMETERS: table_info - A table info struct |
| 528 | * |
| 529 | * RETURN: Pointer to the next table in the list (of same type) |
| 530 | * |
| 531 | * DESCRIPTION: Free the memory associated with an internal ACPI table that |
| 532 | * is either installed or has never been installed. |
| 533 | * Table mutex should be locked. |
| 534 | * |
| 535 | ******************************************************************************/ |
| 536 | |
| 537 | struct acpi_table_desc * |
| 538 | acpi_tb_uninstall_table ( |
| 539 | struct acpi_table_desc *table_desc) |
| 540 | { |
| 541 | struct acpi_table_desc *next_desc; |
| 542 | |
| 543 | |
| 544 | ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc); |
| 545 | |
| 546 | |
| 547 | if (!table_desc) { |
| 548 | return_PTR (NULL); |
| 549 | } |
| 550 | |
| 551 | /* Unlink the descriptor from the doubly linked list */ |
| 552 | |
| 553 | if (table_desc->prev) { |
| 554 | table_desc->prev->next = table_desc->next; |
| 555 | } |
| 556 | else { |
| 557 | /* Is first on list, update list head */ |
| 558 | |
| 559 | acpi_gbl_table_lists[table_desc->type].next = table_desc->next; |
| 560 | } |
| 561 | |
| 562 | if (table_desc->next) { |
| 563 | table_desc->next->prev = table_desc->prev; |
| 564 | } |
| 565 | |
| 566 | /* Free the memory allocated for the table itself */ |
| 567 | |
| 568 | acpi_tb_delete_single_table (table_desc); |
| 569 | |
| 570 | /* Free the table descriptor */ |
| 571 | |
| 572 | next_desc = table_desc->next; |
| 573 | ACPI_MEM_FREE (table_desc); |
| 574 | |
| 575 | /* Return pointer to the next descriptor */ |
| 576 | |
| 577 | return_PTR (next_desc); |
| 578 | } |
| 579 | |
| 580 | |