blob: 10db8484e462ce269f1d4c2f11820000f4318cad [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
45#include <acpi/actables.h>
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define _COMPONENT ACPI_TABLES
Len Brown4be44fc2005-08-05 00:44:28 -040048ACPI_MODULE_NAME("tbinstal")
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Robert Moore44f6c012005-04-18 22:49:35 -040050/* Local prototypes */
Robert Moore44f6c012005-04-18 22:49:35 -040051static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040052acpi_tb_match_signature(char *signature,
53 struct acpi_table_desc *table_info, u8 search_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_tb_match_signature
58 *
59 * PARAMETERS: Signature - Table signature to match
60 * table_info - Return data
Robert Moore44f6c012005-04-18 22:49:35 -040061 * search_type - Table type to match (primary/secondary)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 *
63 * RETURN: Status
64 *
65 * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
66 * tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
67 *
68 ******************************************************************************/
69
Robert Moore44f6c012005-04-18 22:49:35 -040070static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040071acpi_tb_match_signature(char *signature,
72 struct acpi_table_desc *table_info, u8 search_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
Len Brown4be44fc2005-08-05 00:44:28 -040074 acpi_native_uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Len Brown4be44fc2005-08-05 00:44:28 -040076 ACPI_FUNCTION_TRACE("tb_match_signature");
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Robert Moore44f6c012005-04-18 22:49:35 -040078 /* Search for a signature match among the known table types */
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
81 if (!(acpi_gbl_table_data[i].flags & search_type)) {
82 continue;
83 }
84
Len Brown4be44fc2005-08-05 00:44:28 -040085 if (!ACPI_STRNCMP(signature, acpi_gbl_table_data[i].signature,
86 acpi_gbl_table_data[i].sig_length)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 /* Found a signature match, return index if requested */
88
89 if (table_info) {
90 table_info->type = (u8) i;
91 }
92
Len Brown4be44fc2005-08-05 00:44:28 -040093 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
94 "Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
95 (char *)acpi_gbl_table_data[i].
96 signature));
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Len Brown4be44fc2005-08-05 00:44:28 -040098 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 }
100 }
101
Len Brown4be44fc2005-08-05 00:44:28 -0400102 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
103 "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
104 (char *)signature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Len Brown4be44fc2005-08-05 00:44:28 -0400106 return_ACPI_STATUS(AE_TABLE_NOT_SUPPORTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107}
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/*******************************************************************************
110 *
111 * FUNCTION: acpi_tb_install_table
112 *
113 * PARAMETERS: table_info - Return value from acpi_tb_get_table_body
114 *
115 * RETURN: Status
116 *
Robert Moore0c9938c2005-07-29 15:15:00 -0700117 * DESCRIPTION: Install the table into the global data structures.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 *
119 ******************************************************************************/
120
Len Brown4be44fc2005-08-05 00:44:28 -0400121acpi_status acpi_tb_install_table(struct acpi_table_desc *table_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Len Brown4be44fc2005-08-05 00:44:28 -0400123 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Len Brown4be44fc2005-08-05 00:44:28 -0400125 ACPI_FUNCTION_TRACE("tb_install_table");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 /* Lock tables while installing */
128
Len Brown4be44fc2005-08-05 00:44:28 -0400129 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
130 if (ACPI_FAILURE(status)) {
131 ACPI_REPORT_ERROR(("Could not acquire table mutex, %s\n",
132 acpi_format_exception(status)));
133 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 }
135
Robert Moore0c9938c2005-07-29 15:15:00 -0700136 /*
137 * Ignore a table that is already installed. For example, some BIOS
138 * ASL code will repeatedly attempt to load the same SSDT.
139 */
Len Brown4be44fc2005-08-05 00:44:28 -0400140 status = acpi_tb_is_table_installed(table_info);
141 if (ACPI_FAILURE(status)) {
Robert Moore0c9938c2005-07-29 15:15:00 -0700142 goto unlock_and_exit;
143 }
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 /* Install the table into the global data structure */
146
Len Brown4be44fc2005-08-05 00:44:28 -0400147 status = acpi_tb_init_table_descriptor(table_info->type, table_info);
148 if (ACPI_FAILURE(status)) {
149 ACPI_REPORT_ERROR(("Could not install table [%4.4s], %s\n",
150 table_info->pointer->signature,
151 acpi_format_exception(status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
153
Len Brown4be44fc2005-08-05 00:44:28 -0400154 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s located at %p\n",
155 acpi_gbl_table_data[table_info->type].name,
156 table_info->pointer));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Len Brown4be44fc2005-08-05 00:44:28 -0400158 unlock_and_exit:
159 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
160 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/*******************************************************************************
164 *
165 * FUNCTION: acpi_tb_recognize_table
166 *
167 * PARAMETERS: table_info - Return value from acpi_tb_get_table_body
Robert Moore44f6c012005-04-18 22:49:35 -0400168 * search_type - Table type to match (primary/secondary)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 *
170 * RETURN: Status
171 *
172 * DESCRIPTION: Check a table signature for a match against known table types
173 *
174 * NOTE: All table pointers are validated as follows:
175 * 1) Table pointer must point to valid physical memory
176 * 2) Signature must be 4 ASCII chars, even if we don't recognize the
177 * name
178 * 3) Table must be readable for length specified in the header
179 * 4) Table checksum must be valid (with the exception of the FACS
180 * which has no checksum for some odd reason)
181 *
182 ******************************************************************************/
183
184acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400185acpi_tb_recognize_table(struct acpi_table_desc *table_info, u8 search_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Len Brown4be44fc2005-08-05 00:44:28 -0400187 struct acpi_table_header *table_header;
188 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Len Brown4be44fc2005-08-05 00:44:28 -0400190 ACPI_FUNCTION_TRACE("tb_recognize_table");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 /* Ensure that we have a valid table pointer */
193
Len Brown4be44fc2005-08-05 00:44:28 -0400194 table_header = (struct acpi_table_header *)table_info->pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 if (!table_header) {
Len Brown4be44fc2005-08-05 00:44:28 -0400196 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 }
198
199 /*
200 * We only "recognize" a limited number of ACPI tables -- namely, the
201 * ones that are used by the subsystem (DSDT, FADT, etc.)
202 *
203 * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
204 * This can be any one of many valid ACPI tables, it just isn't one of
205 * the tables that is consumed by the core subsystem
206 */
Len Brown4be44fc2005-08-05 00:44:28 -0400207 status = acpi_tb_match_signature(table_header->signature,
208 table_info, search_type);
209 if (ACPI_FAILURE(status)) {
210 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212
Len Brown4be44fc2005-08-05 00:44:28 -0400213 status = acpi_tb_validate_table_header(table_header);
214 if (ACPI_FAILURE(status)) {
215 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217
218 /* Return the table type and length via the info struct */
219
220 table_info->length = (acpi_size) table_header->length;
221
Len Brown4be44fc2005-08-05 00:44:28 -0400222 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223}
224
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225/*******************************************************************************
226 *
227 * FUNCTION: acpi_tb_init_table_descriptor
228 *
229 * PARAMETERS: table_type - The type of the table
230 * table_info - A table info struct
231 *
232 * RETURN: None.
233 *
234 * DESCRIPTION: Install a table into the global data structs.
235 *
236 ******************************************************************************/
237
238acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400239acpi_tb_init_table_descriptor(acpi_table_type table_type,
240 struct acpi_table_desc *table_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Len Brown4be44fc2005-08-05 00:44:28 -0400242 struct acpi_table_list *list_head;
243 struct acpi_table_desc *table_desc;
244 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Len Brown4be44fc2005-08-05 00:44:28 -0400246 ACPI_FUNCTION_TRACE_U32("tb_init_table_descriptor", table_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248 /* Allocate a descriptor for this table */
249
Len Brown4be44fc2005-08-05 00:44:28 -0400250 table_desc = ACPI_MEM_CALLOCATE(sizeof(struct acpi_table_desc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 if (!table_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400252 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 }
254
Robert Mooref9f46012005-07-08 00:00:00 -0400255 /* Get a new owner ID for the table */
256
Len Brown4be44fc2005-08-05 00:44:28 -0400257 status = acpi_ut_allocate_owner_id(&table_desc->owner_id);
258 if (ACPI_FAILURE(status)) {
259 return_ACPI_STATUS(status);
Robert Mooref9f46012005-07-08 00:00:00 -0400260 }
261
Robert Moore44f6c012005-04-18 22:49:35 -0400262 /* Install the table into the global data structure */
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 list_head = &acpi_gbl_table_lists[table_type];
265
266 /*
267 * Two major types of tables: 1) Only one instance is allowed. This
268 * includes most ACPI tables such as the DSDT. 2) Multiple instances of
269 * the table are allowed. This includes SSDT and PSDTs.
270 */
Len Brown4be44fc2005-08-05 00:44:28 -0400271 if (ACPI_IS_SINGLE_TABLE(acpi_gbl_table_data[table_type].flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 /*
273 * Only one table allowed, and a table has alread been installed
274 * at this location, so return an error.
275 */
276 if (list_head->next) {
Len Brown4be44fc2005-08-05 00:44:28 -0400277 ACPI_MEM_FREE(table_desc);
278 return_ACPI_STATUS(AE_ALREADY_EXISTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
280
281 table_desc->next = list_head->next;
282 list_head->next = table_desc;
283
284 if (table_desc->next) {
285 table_desc->next->prev = table_desc;
286 }
287
288 list_head->count++;
Len Brown4be44fc2005-08-05 00:44:28 -0400289 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /*
291 * Link the new table in to the list of tables of this type.
292 * Insert at the end of the list, order IS IMPORTANT.
293 *
294 * table_desc->Prev & Next are already NULL from calloc()
295 */
296 list_head->count++;
297
298 if (!list_head->next) {
299 list_head->next = table_desc;
Len Brown4be44fc2005-08-05 00:44:28 -0400300 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 table_desc->next = list_head->next;
302
303 while (table_desc->next->next) {
304 table_desc->next = table_desc->next->next;
305 }
306
307 table_desc->next->next = table_desc;
308 table_desc->prev = table_desc->next;
309 table_desc->next = NULL;
310 }
311 }
312
313 /* Finish initialization of the table descriptor */
314
Len Brown4be44fc2005-08-05 00:44:28 -0400315 table_desc->type = (u8) table_type;
316 table_desc->pointer = table_info->pointer;
317 table_desc->length = table_info->length;
318 table_desc->allocation = table_info->allocation;
319 table_desc->aml_start = (u8 *) (table_desc->pointer + 1),
320 table_desc->aml_length = (u32) (table_desc->length -
321 (u32) sizeof(struct
322 acpi_table_header));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 table_desc->loaded_into_namespace = FALSE;
324
325 /*
326 * Set the appropriate global pointer (if there is one) to point to the
327 * newly installed table
328 */
329 if (acpi_gbl_table_data[table_type].global_ptr) {
Len Brown4be44fc2005-08-05 00:44:28 -0400330 *(acpi_gbl_table_data[table_type].global_ptr) =
331 table_info->pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
333
334 /* Return Data */
335
Len Brown4be44fc2005-08-05 00:44:28 -0400336 table_info->owner_id = table_desc->owner_id;
337 table_info->installed_desc = table_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Len Brown4be44fc2005-08-05 00:44:28 -0400339 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342/*******************************************************************************
343 *
344 * FUNCTION: acpi_tb_delete_all_tables
345 *
346 * PARAMETERS: None.
347 *
348 * RETURN: None.
349 *
350 * DESCRIPTION: Delete all internal ACPI tables
351 *
352 ******************************************************************************/
353
Len Brown4be44fc2005-08-05 00:44:28 -0400354void acpi_tb_delete_all_tables(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
Len Brown4be44fc2005-08-05 00:44:28 -0400356 acpi_table_type type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358 /*
359 * Free memory allocated for ACPI tables
360 * Memory can either be mapped or allocated
361 */
362 for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400363 acpi_tb_delete_tables_by_type(type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 }
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367/*******************************************************************************
368 *
369 * FUNCTION: acpi_tb_delete_tables_by_type
370 *
371 * PARAMETERS: Type - The table type to be deleted
372 *
373 * RETURN: None.
374 *
375 * DESCRIPTION: Delete an internal ACPI table
376 * Locks the ACPI table mutex
377 *
378 ******************************************************************************/
379
Len Brown4be44fc2005-08-05 00:44:28 -0400380void acpi_tb_delete_tables_by_type(acpi_table_type type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381{
Len Brown4be44fc2005-08-05 00:44:28 -0400382 struct acpi_table_desc *table_desc;
383 u32 count;
384 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Len Brown4be44fc2005-08-05 00:44:28 -0400386 ACPI_FUNCTION_TRACE_U32("tb_delete_tables_by_type", type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388 if (type > ACPI_TABLE_MAX) {
389 return_VOID;
390 }
391
Len Brown4be44fc2005-08-05 00:44:28 -0400392 if (ACPI_FAILURE(acpi_ut_acquire_mutex(ACPI_MTX_TABLES))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 return;
394 }
395
396 /* Clear the appropriate "typed" global table pointer */
397
398 switch (type) {
399 case ACPI_TABLE_RSDP:
400 acpi_gbl_RSDP = NULL;
401 break;
402
403 case ACPI_TABLE_DSDT:
404 acpi_gbl_DSDT = NULL;
405 break;
406
407 case ACPI_TABLE_FADT:
408 acpi_gbl_FADT = NULL;
409 break;
410
411 case ACPI_TABLE_FACS:
412 acpi_gbl_FACS = NULL;
413 break;
414
415 case ACPI_TABLE_XSDT:
416 acpi_gbl_XSDT = NULL;
417 break;
418
419 case ACPI_TABLE_SSDT:
420 case ACPI_TABLE_PSDT:
421 default:
422 break;
423 }
424
425 /*
426 * Free the table
427 * 1) Get the head of the list
428 */
429 table_desc = acpi_gbl_table_lists[type].next;
Len Brown4be44fc2005-08-05 00:44:28 -0400430 count = acpi_gbl_table_lists[type].count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 /*
433 * 2) Walk the entire list, deleting both the allocated tables
434 * and the table descriptors
435 */
436 for (i = 0; i < count; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400437 table_desc = acpi_tb_uninstall_table(table_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
439
Len Brown4be44fc2005-08-05 00:44:28 -0400440 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 return_VOID;
442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444/*******************************************************************************
445 *
446 * FUNCTION: acpi_tb_delete_single_table
447 *
448 * PARAMETERS: table_info - A table info struct
449 *
450 * RETURN: None.
451 *
452 * DESCRIPTION: Low-level free for a single ACPI table. Handles cases where
453 * the table was allocated a buffer or was mapped.
454 *
455 ******************************************************************************/
456
Len Brown4be44fc2005-08-05 00:44:28 -0400457void acpi_tb_delete_single_table(struct acpi_table_desc *table_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
459
460 /* Must have a valid table descriptor and pointer */
461
Len Brown4be44fc2005-08-05 00:44:28 -0400462 if ((!table_desc) || (!table_desc->pointer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 return;
464 }
465
466 /* Valid table, determine type of memory allocation */
467
468 switch (table_desc->allocation) {
469 case ACPI_MEM_NOT_ALLOCATED:
470 break;
471
472 case ACPI_MEM_ALLOCATED:
473
Len Brown4be44fc2005-08-05 00:44:28 -0400474 ACPI_MEM_FREE(table_desc->pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 break;
476
477 case ACPI_MEM_MAPPED:
478
Len Brown4be44fc2005-08-05 00:44:28 -0400479 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 break;
481
482 default:
483 break;
484 }
485}
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487/*******************************************************************************
488 *
489 * FUNCTION: acpi_tb_uninstall_table
490 *
491 * PARAMETERS: table_info - A table info struct
492 *
493 * RETURN: Pointer to the next table in the list (of same type)
494 *
495 * DESCRIPTION: Free the memory associated with an internal ACPI table that
496 * is either installed or has never been installed.
497 * Table mutex should be locked.
498 *
499 ******************************************************************************/
500
Len Brown4be44fc2005-08-05 00:44:28 -0400501struct acpi_table_desc *acpi_tb_uninstall_table(struct acpi_table_desc
502 *table_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503{
Len Brown4be44fc2005-08-05 00:44:28 -0400504 struct acpi_table_desc *next_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Len Brown4be44fc2005-08-05 00:44:28 -0400506 ACPI_FUNCTION_TRACE_PTR("tb_uninstall_table", table_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
508 if (!table_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400509 return_PTR(NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
511
512 /* Unlink the descriptor from the doubly linked list */
513
514 if (table_desc->prev) {
515 table_desc->prev->next = table_desc->next;
Len Brown4be44fc2005-08-05 00:44:28 -0400516 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 /* Is first on list, update list head */
518
519 acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
520 }
521
522 if (table_desc->next) {
523 table_desc->next->prev = table_desc->prev;
524 }
525
526 /* Free the memory allocated for the table itself */
527
Len Brown4be44fc2005-08-05 00:44:28 -0400528 acpi_tb_delete_single_table(table_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 /* Free the table descriptor */
531
532 next_desc = table_desc->next;
Len Brown4be44fc2005-08-05 00:44:28 -0400533 ACPI_MEM_FREE(table_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 /* Return pointer to the next descriptor */
536
Len Brown4be44fc2005-08-05 00:44:28 -0400537 return_PTR(next_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538}