1 /******************************************************************************
2 *
3 * Module Name: tbinstal - ACPI table installation and removal
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, Intel Corp.
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 "accommon.h"
46 #include "acnamesp.h"
47 #include "actables.h"
48
49 #define _COMPONENT ACPI_TABLES
50 ACPI_MODULE_NAME("tbinstal")
51
52 /******************************************************************************
53 *
54 * FUNCTION: acpi_tb_verify_table
55 *
56 * PARAMETERS: table_desc - table
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: this function is called to verify and map table
61 *
62 *****************************************************************************/
acpi_tb_verify_table(struct acpi_table_desc * table_desc)63 acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
64 {
65 acpi_status status = AE_OK;
66
67 ACPI_FUNCTION_TRACE(tb_verify_table);
68
69 /* Map the table if necessary */
70
71 if (!table_desc->pointer) {
72 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
73 ACPI_TABLE_ORIGIN_MAPPED) {
74 table_desc->pointer =
75 acpi_os_map_memory(table_desc->address,
76 table_desc->length);
77 }
78 if (!table_desc->pointer) {
79 return_ACPI_STATUS(AE_NO_MEMORY);
80 }
81 }
82
83 /* FACS is the odd table, has no standard ACPI header and no checksum */
84
85 if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
86
87 /* Always calculate checksum, ignore bad checksum if requested */
88
89 status =
90 acpi_tb_verify_checksum(table_desc->pointer,
91 table_desc->length);
92 }
93
94 return_ACPI_STATUS(status);
95 }
96
97 /*******************************************************************************
98 *
99 * FUNCTION: acpi_tb_add_table
100 *
101 * PARAMETERS: table_desc - Table descriptor
102 * table_index - Where the table index is returned
103 *
104 * RETURN: Status
105 *
106 * DESCRIPTION: This function is called to add an ACPI table. It is used to
107 * dynamically load tables via the Load and load_table AML
108 * operators.
109 *
110 ******************************************************************************/
111
112 acpi_status
acpi_tb_add_table(struct acpi_table_desc * table_desc,u32 * table_index)113 acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
114 {
115 u32 i;
116 acpi_status status = AE_OK;
117
118 ACPI_FUNCTION_TRACE(tb_add_table);
119
120 if (!table_desc->pointer) {
121 status = acpi_tb_verify_table(table_desc);
122 if (ACPI_FAILURE(status) || !table_desc->pointer) {
123 return_ACPI_STATUS(status);
124 }
125 }
126
127 /*
128 * Validate the incoming table signature.
129 *
130 * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
131 * 2) We added support for OEMx tables, signature "OEM".
132 * 3) Valid tables were encountered with a null signature, so we just
133 * gave up on validating the signature, (05/2008).
134 * 4) We encountered non-AML tables such as the MADT, which caused
135 * interpreter errors and kernel faults. So now, we once again allow
136 * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
137 */
138 if ((table_desc->pointer->signature[0] != 0x00) &&
139 (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
140 && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
141 ACPI_BIOS_ERROR((AE_INFO,
142 "Table has invalid signature [%4.4s] (0x%8.8X), "
143 "must be SSDT or OEMx",
144 acpi_ut_valid_acpi_name(*(u32 *)table_desc->
145 pointer->
146 signature) ?
147 table_desc->pointer->signature : "????",
148 *(u32 *)table_desc->pointer->signature));
149
150 return_ACPI_STATUS(AE_BAD_SIGNATURE);
151 }
152
153 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
154
155 /* Check if table is already registered */
156
157 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
158 if (!acpi_gbl_root_table_list.tables[i].pointer) {
159 status =
160 acpi_tb_verify_table(&acpi_gbl_root_table_list.
161 tables[i]);
162 if (ACPI_FAILURE(status)
163 || !acpi_gbl_root_table_list.tables[i].pointer) {
164 continue;
165 }
166 }
167
168 /*
169 * Check for a table match on the entire table length,
170 * not just the header.
171 */
172 if (table_desc->length !=
173 acpi_gbl_root_table_list.tables[i].length) {
174 continue;
175 }
176
177 if (ACPI_MEMCMP(table_desc->pointer,
178 acpi_gbl_root_table_list.tables[i].pointer,
179 acpi_gbl_root_table_list.tables[i].length)) {
180 continue;
181 }
182
183 /*
184 * Note: the current mechanism does not unregister a table if it is
185 * dynamically unloaded. The related namespace entries are deleted,
186 * but the table remains in the root table list.
187 *
188 * The assumption here is that the number of different tables that
189 * will be loaded is actually small, and there is minimal overhead
190 * in just keeping the table in case it is needed again.
191 *
192 * If this assumption changes in the future (perhaps on large
193 * machines with many table load/unload operations), tables will
194 * need to be unregistered when they are unloaded, and slots in the
195 * root table list should be reused when empty.
196 */
197
198 /*
199 * Table is already registered.
200 * We can delete the table that was passed as a parameter.
201 */
202 acpi_tb_delete_table(table_desc);
203 *table_index = i;
204
205 if (acpi_gbl_root_table_list.tables[i].
206 flags & ACPI_TABLE_IS_LOADED) {
207
208 /* Table is still loaded, this is an error */
209
210 status = AE_ALREADY_EXISTS;
211 goto release;
212 } else {
213 /* Table was unloaded, allow it to be reloaded */
214
215 table_desc->pointer =
216 acpi_gbl_root_table_list.tables[i].pointer;
217 table_desc->address =
218 acpi_gbl_root_table_list.tables[i].address;
219 status = AE_OK;
220 goto print_header;
221 }
222 }
223
224 /*
225 * ACPI Table Override:
226 * Allow the host to override dynamically loaded tables.
227 * NOTE: the table is fully mapped at this point, and the mapping will
228 * be deleted by tb_table_override if the table is actually overridden.
229 */
230 (void)acpi_tb_table_override(table_desc->pointer, table_desc);
231
232 /* Add the table to the global root table list */
233
234 status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
235 table_desc->length, table_desc->flags,
236 table_index);
237 if (ACPI_FAILURE(status)) {
238 goto release;
239 }
240
241 print_header:
242 acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
243
244 release:
245 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
246 return_ACPI_STATUS(status);
247 }
248
249 /*******************************************************************************
250 *
251 * FUNCTION: acpi_tb_table_override
252 *
253 * PARAMETERS: table_header - Header for the original table
254 * table_desc - Table descriptor initialized for the
255 * original table. May or may not be mapped.
256 *
257 * RETURN: Pointer to the entire new table. NULL if table not overridden.
258 * If overridden, installs the new table within the input table
259 * descriptor.
260 *
261 * DESCRIPTION: Attempt table override by calling the OSL override functions.
262 * Note: If the table is overridden, then the entire new table
263 * is mapped and returned by this function.
264 *
265 ******************************************************************************/
266
acpi_tb_table_override(struct acpi_table_header * table_header,struct acpi_table_desc * table_desc)267 struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
268 *table_header,
269 struct acpi_table_desc
270 *table_desc)
271 {
272 acpi_status status;
273 struct acpi_table_header *new_table = NULL;
274 acpi_physical_address new_address = 0;
275 u32 new_table_length = 0;
276 u8 new_flags;
277 char *override_type;
278
279 /* (1) Attempt logical override (returns a logical address) */
280
281 status = acpi_os_table_override(table_header, &new_table);
282 if (ACPI_SUCCESS(status) && new_table) {
283 new_address = ACPI_PTR_TO_PHYSADDR(new_table);
284 new_table_length = new_table->length;
285 new_flags = ACPI_TABLE_ORIGIN_OVERRIDE;
286 override_type = "Logical";
287 goto finish_override;
288 }
289
290 /* (2) Attempt physical override (returns a physical address) */
291
292 status = acpi_os_physical_table_override(table_header,
293 &new_address,
294 &new_table_length);
295 if (ACPI_SUCCESS(status) && new_address && new_table_length) {
296
297 /* Map the entire new table */
298
299 new_table = acpi_os_map_memory(new_address, new_table_length);
300 if (!new_table) {
301 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
302 "%4.4s %p Attempted physical table override failed",
303 table_header->signature,
304 ACPI_CAST_PTR(void,
305 table_desc->address)));
306 return (NULL);
307 }
308
309 override_type = "Physical";
310 new_flags = ACPI_TABLE_ORIGIN_MAPPED;
311 goto finish_override;
312 }
313
314 return (NULL); /* There was no override */
315
316 finish_override:
317
318 ACPI_INFO((AE_INFO,
319 "%4.4s %p %s table override, new table: %p",
320 table_header->signature,
321 ACPI_CAST_PTR(void, table_desc->address),
322 override_type, new_table));
323
324 /* We can now unmap/delete the original table (if fully mapped) */
325
326 acpi_tb_delete_table(table_desc);
327
328 /* Setup descriptor for the new table */
329
330 table_desc->address = new_address;
331 table_desc->pointer = new_table;
332 table_desc->length = new_table_length;
333 table_desc->flags = new_flags;
334
335 return (new_table);
336 }
337
338 /*******************************************************************************
339 *
340 * FUNCTION: acpi_tb_resize_root_table_list
341 *
342 * PARAMETERS: None
343 *
344 * RETURN: Status
345 *
346 * DESCRIPTION: Expand the size of global table array
347 *
348 ******************************************************************************/
349
acpi_tb_resize_root_table_list(void)350 acpi_status acpi_tb_resize_root_table_list(void)
351 {
352 struct acpi_table_desc *tables;
353 u32 table_count;
354
355 ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
356
357 /* allow_resize flag is a parameter to acpi_initialize_tables */
358
359 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
360 ACPI_ERROR((AE_INFO,
361 "Resize of Root Table Array is not allowed"));
362 return_ACPI_STATUS(AE_SUPPORT);
363 }
364
365 /* Increase the Table Array size */
366
367 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
368 table_count = acpi_gbl_root_table_list.max_table_count;
369 } else {
370 table_count = acpi_gbl_root_table_list.current_table_count;
371 }
372
373 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
374 ACPI_ROOT_TABLE_SIZE_INCREMENT) *
375 sizeof(struct acpi_table_desc));
376 if (!tables) {
377 ACPI_ERROR((AE_INFO,
378 "Could not allocate new root table array"));
379 return_ACPI_STATUS(AE_NO_MEMORY);
380 }
381
382 /* Copy and free the previous table array */
383
384 if (acpi_gbl_root_table_list.tables) {
385 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
386 (acpi_size) table_count *
387 sizeof(struct acpi_table_desc));
388
389 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
390 ACPI_FREE(acpi_gbl_root_table_list.tables);
391 }
392 }
393
394 acpi_gbl_root_table_list.tables = tables;
395 acpi_gbl_root_table_list.max_table_count =
396 table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
397 acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
398
399 return_ACPI_STATUS(AE_OK);
400 }
401
402 /*******************************************************************************
403 *
404 * FUNCTION: acpi_tb_store_table
405 *
406 * PARAMETERS: address - Table address
407 * table - Table header
408 * length - Table length
409 * flags - flags
410 *
411 * RETURN: Status and table index.
412 *
413 * DESCRIPTION: Add an ACPI table to the global table list
414 *
415 ******************************************************************************/
416
417 acpi_status
acpi_tb_store_table(acpi_physical_address address,struct acpi_table_header * table,u32 length,u8 flags,u32 * table_index)418 acpi_tb_store_table(acpi_physical_address address,
419 struct acpi_table_header *table,
420 u32 length, u8 flags, u32 *table_index)
421 {
422 acpi_status status;
423 struct acpi_table_desc *new_table;
424
425 /* Ensure that there is room for the table in the Root Table List */
426
427 if (acpi_gbl_root_table_list.current_table_count >=
428 acpi_gbl_root_table_list.max_table_count) {
429 status = acpi_tb_resize_root_table_list();
430 if (ACPI_FAILURE(status)) {
431 return (status);
432 }
433 }
434
435 new_table =
436 &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
437 current_table_count];
438
439 /* Initialize added table */
440
441 new_table->address = address;
442 new_table->pointer = table;
443 new_table->length = length;
444 new_table->owner_id = 0;
445 new_table->flags = flags;
446
447 ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
448
449 *table_index = acpi_gbl_root_table_list.current_table_count;
450 acpi_gbl_root_table_list.current_table_count++;
451 return (AE_OK);
452 }
453
454 /*******************************************************************************
455 *
456 * FUNCTION: acpi_tb_delete_table
457 *
458 * PARAMETERS: table_index - Table index
459 *
460 * RETURN: None
461 *
462 * DESCRIPTION: Delete one internal ACPI table
463 *
464 ******************************************************************************/
465
acpi_tb_delete_table(struct acpi_table_desc * table_desc)466 void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
467 {
468 /* Table must be mapped or allocated */
469 if (!table_desc->pointer) {
470 return;
471 }
472 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
473 case ACPI_TABLE_ORIGIN_MAPPED:
474 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
475 break;
476 case ACPI_TABLE_ORIGIN_ALLOCATED:
477 ACPI_FREE(table_desc->pointer);
478 break;
479
480 /* Not mapped or allocated, there is nothing we can do */
481
482 default:
483 return;
484 }
485
486 table_desc->pointer = NULL;
487 }
488
489 /*******************************************************************************
490 *
491 * FUNCTION: acpi_tb_terminate
492 *
493 * PARAMETERS: None
494 *
495 * RETURN: None
496 *
497 * DESCRIPTION: Delete all internal ACPI tables
498 *
499 ******************************************************************************/
500
acpi_tb_terminate(void)501 void acpi_tb_terminate(void)
502 {
503 u32 i;
504
505 ACPI_FUNCTION_TRACE(tb_terminate);
506
507 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
508
509 /* Delete the individual tables */
510
511 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
512 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
513 }
514
515 /*
516 * Delete the root table array if allocated locally. Array cannot be
517 * mapped, so we don't need to check for that flag.
518 */
519 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
520 ACPI_FREE(acpi_gbl_root_table_list.tables);
521 }
522
523 acpi_gbl_root_table_list.tables = NULL;
524 acpi_gbl_root_table_list.flags = 0;
525 acpi_gbl_root_table_list.current_table_count = 0;
526
527 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
528 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
529
530 return_VOID;
531 }
532
533 /*******************************************************************************
534 *
535 * FUNCTION: acpi_tb_delete_namespace_by_owner
536 *
537 * PARAMETERS: table_index - Table index
538 *
539 * RETURN: Status
540 *
541 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
542 *
543 ******************************************************************************/
544
acpi_tb_delete_namespace_by_owner(u32 table_index)545 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
546 {
547 acpi_owner_id owner_id;
548 acpi_status status;
549
550 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
551
552 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
553 if (ACPI_FAILURE(status)) {
554 return_ACPI_STATUS(status);
555 }
556
557 if (table_index >= acpi_gbl_root_table_list.current_table_count) {
558
559 /* The table index does not exist */
560
561 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
562 return_ACPI_STATUS(AE_NOT_EXIST);
563 }
564
565 /* Get the owner ID for this table, used to delete namespace nodes */
566
567 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
568 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
569
570 /*
571 * Need to acquire the namespace writer lock to prevent interference
572 * with any concurrent namespace walks. The interpreter must be
573 * released during the deletion since the acquisition of the deletion
574 * lock may block, and also since the execution of a namespace walk
575 * must be allowed to use the interpreter.
576 */
577 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
578 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
579
580 acpi_ns_delete_namespace_by_owner(owner_id);
581 if (ACPI_FAILURE(status)) {
582 return_ACPI_STATUS(status);
583 }
584
585 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
586
587 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
588 return_ACPI_STATUS(status);
589 }
590
591 /*******************************************************************************
592 *
593 * FUNCTION: acpi_tb_allocate_owner_id
594 *
595 * PARAMETERS: table_index - Table index
596 *
597 * RETURN: Status
598 *
599 * DESCRIPTION: Allocates owner_id in table_desc
600 *
601 ******************************************************************************/
602
acpi_tb_allocate_owner_id(u32 table_index)603 acpi_status acpi_tb_allocate_owner_id(u32 table_index)
604 {
605 acpi_status status = AE_BAD_PARAMETER;
606
607 ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
608
609 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
610 if (table_index < acpi_gbl_root_table_list.current_table_count) {
611 status = acpi_ut_allocate_owner_id
612 (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
613 }
614
615 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
616 return_ACPI_STATUS(status);
617 }
618
619 /*******************************************************************************
620 *
621 * FUNCTION: acpi_tb_release_owner_id
622 *
623 * PARAMETERS: table_index - Table index
624 *
625 * RETURN: Status
626 *
627 * DESCRIPTION: Releases owner_id in table_desc
628 *
629 ******************************************************************************/
630
acpi_tb_release_owner_id(u32 table_index)631 acpi_status acpi_tb_release_owner_id(u32 table_index)
632 {
633 acpi_status status = AE_BAD_PARAMETER;
634
635 ACPI_FUNCTION_TRACE(tb_release_owner_id);
636
637 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
638 if (table_index < acpi_gbl_root_table_list.current_table_count) {
639 acpi_ut_release_owner_id(&
640 (acpi_gbl_root_table_list.
641 tables[table_index].owner_id));
642 status = AE_OK;
643 }
644
645 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
646 return_ACPI_STATUS(status);
647 }
648
649 /*******************************************************************************
650 *
651 * FUNCTION: acpi_tb_get_owner_id
652 *
653 * PARAMETERS: table_index - Table index
654 * owner_id - Where the table owner_id is returned
655 *
656 * RETURN: Status
657 *
658 * DESCRIPTION: returns owner_id for the ACPI table
659 *
660 ******************************************************************************/
661
acpi_tb_get_owner_id(u32 table_index,acpi_owner_id * owner_id)662 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
663 {
664 acpi_status status = AE_BAD_PARAMETER;
665
666 ACPI_FUNCTION_TRACE(tb_get_owner_id);
667
668 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
669 if (table_index < acpi_gbl_root_table_list.current_table_count) {
670 *owner_id =
671 acpi_gbl_root_table_list.tables[table_index].owner_id;
672 status = AE_OK;
673 }
674
675 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
676 return_ACPI_STATUS(status);
677 }
678
679 /*******************************************************************************
680 *
681 * FUNCTION: acpi_tb_is_table_loaded
682 *
683 * PARAMETERS: table_index - Table index
684 *
685 * RETURN: Table Loaded Flag
686 *
687 ******************************************************************************/
688
acpi_tb_is_table_loaded(u32 table_index)689 u8 acpi_tb_is_table_loaded(u32 table_index)
690 {
691 u8 is_loaded = FALSE;
692
693 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
694 if (table_index < acpi_gbl_root_table_list.current_table_count) {
695 is_loaded = (u8)
696 (acpi_gbl_root_table_list.tables[table_index].flags &
697 ACPI_TABLE_IS_LOADED);
698 }
699
700 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
701 return (is_loaded);
702 }
703
704 /*******************************************************************************
705 *
706 * FUNCTION: acpi_tb_set_table_loaded_flag
707 *
708 * PARAMETERS: table_index - Table index
709 * is_loaded - TRUE if table is loaded, FALSE otherwise
710 *
711 * RETURN: None
712 *
713 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
714 *
715 ******************************************************************************/
716
acpi_tb_set_table_loaded_flag(u32 table_index,u8 is_loaded)717 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
718 {
719
720 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
721 if (table_index < acpi_gbl_root_table_list.current_table_count) {
722 if (is_loaded) {
723 acpi_gbl_root_table_list.tables[table_index].flags |=
724 ACPI_TABLE_IS_LOADED;
725 } else {
726 acpi_gbl_root_table_list.tables[table_index].flags &=
727 ~ACPI_TABLE_IS_LOADED;
728 }
729 }
730
731 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
732 }
733