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1/******************************************************************************
2 *
3 * Module Name: tbdata - Table manager data structure functions
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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
50ACPI_MODULE_NAME("tbdata")
51
52/*******************************************************************************
53 *
54 * FUNCTION: acpi_tb_init_table_descriptor
55 *
56 * PARAMETERS: table_desc - Table descriptor
57 * address - Physical address of the table
58 * flags - Allocation flags of the table
59 * table - Pointer to the table
60 *
61 * RETURN: None
62 *
63 * DESCRIPTION: Initialize a new table descriptor
64 *
65 ******************************************************************************/
66void
67acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
68 acpi_physical_address address,
69 u8 flags, struct acpi_table_header *table)
70{
71
72 /*
73 * Initialize the table descriptor. Set the pointer to NULL, since the
74 * table is not fully mapped at this time.
75 */
76 memset(table_desc, 0, sizeof(struct acpi_table_desc));
77 table_desc->address = address;
78 table_desc->length = table->length;
79 table_desc->flags = flags;
80 ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
81}
82
83/*******************************************************************************
84 *
85 * FUNCTION: acpi_tb_acquire_table
86 *
87 * PARAMETERS: table_desc - Table descriptor
88 * table_ptr - Where table is returned
89 * table_length - Where table length is returned
90 * table_flags - Where table allocation flags are returned
91 *
92 * RETURN: Status
93 *
94 * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
95 * maintained in the acpi_gbl_root_table_list.
96 *
97 ******************************************************************************/
98
99acpi_status
100acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
101 struct acpi_table_header **table_ptr,
102 u32 *table_length, u8 *table_flags)
103{
104 struct acpi_table_header *table = NULL;
105
106 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
107 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
108
109 table =
110 acpi_os_map_memory(table_desc->address, table_desc->length);
111 break;
112
113 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
114 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
115
116 table = ACPI_CAST_PTR(struct acpi_table_header,
117 ACPI_PHYSADDR_TO_PTR(table_desc->
118 address));
119 break;
120
121 default:
122
123 break;
124 }
125
126 /* Table is not valid yet */
127
128 if (!table) {
129 return (AE_NO_MEMORY);
130 }
131
132 /* Fill the return values */
133
134 *table_ptr = table;
135 *table_length = table_desc->length;
136 *table_flags = table_desc->flags;
137 return (AE_OK);
138}
139
140/*******************************************************************************
141 *
142 * FUNCTION: acpi_tb_release_table
143 *
144 * PARAMETERS: table - Pointer for the table
145 * table_length - Length for the table
146 * table_flags - Allocation flags for the table
147 *
148 * RETURN: None
149 *
150 * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
151 *
152 ******************************************************************************/
153
154void
155acpi_tb_release_table(struct acpi_table_header *table,
156 u32 table_length, u8 table_flags)
157{
158
159 switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
160 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
161
162 acpi_os_unmap_memory(table, table_length);
163 break;
164
165 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
166 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
167 default:
168
169 break;
170 }
171}
172
173/*******************************************************************************
174 *
175 * FUNCTION: acpi_tb_acquire_temp_table
176 *
177 * PARAMETERS: table_desc - Table descriptor to be acquired
178 * address - Address of the table
179 * flags - Allocation flags of the table
180 *
181 * RETURN: Status
182 *
183 * DESCRIPTION: This function validates the table header to obtain the length
184 * of a table and fills the table descriptor to make its state as
185 * "INSTALLED". Such a table descriptor is only used for verified
186 * installation.
187 *
188 ******************************************************************************/
189
190acpi_status
191acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
192 acpi_physical_address address, u8 flags)
193{
194 struct acpi_table_header *table_header;
195
196 switch (flags & ACPI_TABLE_ORIGIN_MASK) {
197 case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
198
199 /* Get the length of the full table from the header */
200
201 table_header =
202 acpi_os_map_memory(address,
203 sizeof(struct acpi_table_header));
204 if (!table_header) {
205 return (AE_NO_MEMORY);
206 }
207
208 acpi_tb_init_table_descriptor(table_desc, address, flags,
209 table_header);
210 acpi_os_unmap_memory(table_header,
211 sizeof(struct acpi_table_header));
212 return (AE_OK);
213
214 case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
215 case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
216
217 table_header = ACPI_CAST_PTR(struct acpi_table_header,
218 ACPI_PHYSADDR_TO_PTR(address));
219 if (!table_header) {
220 return (AE_NO_MEMORY);
221 }
222
223 acpi_tb_init_table_descriptor(table_desc, address, flags,
224 table_header);
225 return (AE_OK);
226
227 default:
228
229 break;
230 }
231
232 /* Table is not valid yet */
233
234 return (AE_NO_MEMORY);
235}
236
237/*******************************************************************************
238 *
239 * FUNCTION: acpi_tb_release_temp_table
240 *
241 * PARAMETERS: table_desc - Table descriptor to be released
242 *
243 * RETURN: Status
244 *
245 * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
246 *
247 *****************************************************************************/
248
249void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
250{
251
252 /*
253 * Note that the .Address is maintained by the callers of
254 * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
255 * where .Address will be freed.
256 */
257 acpi_tb_invalidate_table(table_desc);
258}
259
260/******************************************************************************
261 *
262 * FUNCTION: acpi_tb_validate_table
263 *
264 * PARAMETERS: table_desc - Table descriptor
265 *
266 * RETURN: Status
267 *
268 * DESCRIPTION: This function is called to validate the table, the returned
269 * table descriptor is in "VALIDATED" state.
270 *
271 *****************************************************************************/
272
273acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
274{
275 acpi_status status = AE_OK;
276
277 ACPI_FUNCTION_TRACE(tb_validate_table);
278
279 /* Validate the table if necessary */
280
281 if (!table_desc->pointer) {
282 status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
283 &table_desc->length,
284 &table_desc->flags);
285 if (!table_desc->pointer) {
286 status = AE_NO_MEMORY;
287 }
288 }
289
290 return_ACPI_STATUS(status);
291}
292
293/*******************************************************************************
294 *
295 * FUNCTION: acpi_tb_invalidate_table
296 *
297 * PARAMETERS: table_desc - Table descriptor
298 *
299 * RETURN: None
300 *
301 * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
302 * acpi_tb_validate_table().
303 *
304 ******************************************************************************/
305
306void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
307{
308
309 ACPI_FUNCTION_TRACE(tb_invalidate_table);
310
311 /* Table must be validated */
312
313 if (!table_desc->pointer) {
314 return_VOID;
315 }
316
317 acpi_tb_release_table(table_desc->pointer, table_desc->length,
318 table_desc->flags);
319 table_desc->pointer = NULL;
320
321 return_VOID;
322}
323
324/******************************************************************************
325 *
326 * FUNCTION: acpi_tb_validate_temp_table
327 *
328 * PARAMETERS: table_desc - Table descriptor
329 *
330 * RETURN: Status
331 *
332 * DESCRIPTION: This function is called to validate the table, the returned
333 * table descriptor is in "VALIDATED" state.
334 *
335 *****************************************************************************/
336
337acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
338{
339
340 if (!table_desc->pointer && !acpi_gbl_verify_table_checksum) {
341 /*
342 * Only validates the header of the table.
343 * Note that Length contains the size of the mapping after invoking
344 * this work around, this value is required by
345 * acpi_tb_release_temp_table().
346 * We can do this because in acpi_init_table_descriptor(), the Length
347 * field of the installed descriptor is filled with the actual
348 * table length obtaining from the table header.
349 */
350 table_desc->length = sizeof(struct acpi_table_header);
351 }
352
353 return (acpi_tb_validate_table(table_desc));
354}
355
356/******************************************************************************
357 *
358 * FUNCTION: acpi_tb_verify_temp_table
359 *
360 * PARAMETERS: table_desc - Table descriptor
361 * signature - Table signature to verify
362 *
363 * RETURN: Status
364 *
365 * DESCRIPTION: This function is called to validate and verify the table, the
366 * returned table descriptor is in "VALIDATED" state.
367 *
368 *****************************************************************************/
369
370acpi_status
371acpi_tb_verify_temp_table(struct acpi_table_desc * table_desc, char *signature)
372{
373 acpi_status status = AE_OK;
374
375 ACPI_FUNCTION_TRACE(tb_verify_temp_table);
376
377 /* Validate the table */
378
379 status = acpi_tb_validate_temp_table(table_desc);
380 if (ACPI_FAILURE(status)) {
381 return_ACPI_STATUS(AE_NO_MEMORY);
382 }
383
384 /* If a particular signature is expected (DSDT/FACS), it must match */
385
386 if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
387 ACPI_BIOS_ERROR((AE_INFO,
388 "Invalid signature 0x%X for ACPI table, expected [%s]",
389 table_desc->signature.integer, signature));
390 status = AE_BAD_SIGNATURE;
391 goto invalidate_and_exit;
392 }
393
394 /* Verify the checksum */
395
396 if (acpi_gbl_verify_table_checksum) {
397 status =
398 acpi_tb_verify_checksum(table_desc->pointer,
399 table_desc->length);
400 if (ACPI_FAILURE(status)) {
401 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
402 "%4.4s 0x%8.8X%8.8X"
403 " Attempted table install failed",
404 acpi_ut_valid_acpi_name(table_desc->
405 signature.
406 ascii) ?
407 table_desc->signature.ascii : "????",
408 ACPI_FORMAT_UINT64(table_desc->
409 address)));
410
411 goto invalidate_and_exit;
412 }
413 }
414
415 return_ACPI_STATUS(AE_OK);
416
417invalidate_and_exit:
418 acpi_tb_invalidate_table(table_desc);
419 return_ACPI_STATUS(status);
420}
421
422/*******************************************************************************
423 *
424 * FUNCTION: acpi_tb_resize_root_table_list
425 *
426 * PARAMETERS: None
427 *
428 * RETURN: Status
429 *
430 * DESCRIPTION: Expand the size of global table array
431 *
432 ******************************************************************************/
433
434acpi_status acpi_tb_resize_root_table_list(void)
435{
436 struct acpi_table_desc *tables;
437 u32 table_count;
438
439 ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
440
441 /* allow_resize flag is a parameter to acpi_initialize_tables */
442
443 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
444 ACPI_ERROR((AE_INFO,
445 "Resize of Root Table Array is not allowed"));
446 return_ACPI_STATUS(AE_SUPPORT);
447 }
448
449 /* Increase the Table Array size */
450
451 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
452 table_count = acpi_gbl_root_table_list.max_table_count;
453 } else {
454 table_count = acpi_gbl_root_table_list.current_table_count;
455 }
456
457 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
458 ACPI_ROOT_TABLE_SIZE_INCREMENT) *
459 sizeof(struct acpi_table_desc));
460 if (!tables) {
461 ACPI_ERROR((AE_INFO,
462 "Could not allocate new root table array"));
463 return_ACPI_STATUS(AE_NO_MEMORY);
464 }
465
466 /* Copy and free the previous table array */
467
468 if (acpi_gbl_root_table_list.tables) {
469 memcpy(tables, acpi_gbl_root_table_list.tables,
470 (acpi_size) table_count *
471 sizeof(struct acpi_table_desc));
472
473 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
474 ACPI_FREE(acpi_gbl_root_table_list.tables);
475 }
476 }
477
478 acpi_gbl_root_table_list.tables = tables;
479 acpi_gbl_root_table_list.max_table_count =
480 table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
481 acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
482
483 return_ACPI_STATUS(AE_OK);
484}
485
486/*******************************************************************************
487 *
488 * FUNCTION: acpi_tb_get_next_table_descriptor
489 *
490 * PARAMETERS: table_index - Where table index is returned
491 * table_desc - Where table descriptor is returned
492 *
493 * RETURN: Status and table index/descriptor.
494 *
495 * DESCRIPTION: Allocate a new ACPI table entry to the global table list
496 *
497 ******************************************************************************/
498
499acpi_status
500acpi_tb_get_next_table_descriptor(u32 *table_index,
501 struct acpi_table_desc **table_desc)
502{
503 acpi_status status;
504 u32 i;
505
506 /* Ensure that there is room for the table in the Root Table List */
507
508 if (acpi_gbl_root_table_list.current_table_count >=
509 acpi_gbl_root_table_list.max_table_count) {
510 status = acpi_tb_resize_root_table_list();
511 if (ACPI_FAILURE(status)) {
512 return (status);
513 }
514 }
515
516 i = acpi_gbl_root_table_list.current_table_count;
517 acpi_gbl_root_table_list.current_table_count++;
518
519 if (table_index) {
520 *table_index = i;
521 }
522 if (table_desc) {
523 *table_desc = &acpi_gbl_root_table_list.tables[i];
524 }
525
526 return (AE_OK);
527}
528
529/*******************************************************************************
530 *
531 * FUNCTION: acpi_tb_terminate
532 *
533 * PARAMETERS: None
534 *
535 * RETURN: None
536 *
537 * DESCRIPTION: Delete all internal ACPI tables
538 *
539 ******************************************************************************/
540
541void acpi_tb_terminate(void)
542{
543 u32 i;
544
545 ACPI_FUNCTION_TRACE(tb_terminate);
546
547 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
548
549 /* Delete the individual tables */
550
551 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
552 acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
553 }
554
555 /*
556 * Delete the root table array if allocated locally. Array cannot be
557 * mapped, so we don't need to check for that flag.
558 */
559 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
560 ACPI_FREE(acpi_gbl_root_table_list.tables);
561 }
562
563 acpi_gbl_root_table_list.tables = NULL;
564 acpi_gbl_root_table_list.flags = 0;
565 acpi_gbl_root_table_list.current_table_count = 0;
566
567 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
568
569 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
570 return_VOID;
571}
572
573/*******************************************************************************
574 *
575 * FUNCTION: acpi_tb_delete_namespace_by_owner
576 *
577 * PARAMETERS: table_index - Table index
578 *
579 * RETURN: Status
580 *
581 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
582 *
583 ******************************************************************************/
584
585acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
586{
587 acpi_owner_id owner_id;
588 acpi_status status;
589
590 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
591
592 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
593 if (ACPI_FAILURE(status)) {
594 return_ACPI_STATUS(status);
595 }
596
597 if (table_index >= acpi_gbl_root_table_list.current_table_count) {
598
599 /* The table index does not exist */
600
601 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
602 return_ACPI_STATUS(AE_NOT_EXIST);
603 }
604
605 /* Get the owner ID for this table, used to delete namespace nodes */
606
607 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
608 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
609
610 /*
611 * Need to acquire the namespace writer lock to prevent interference
612 * with any concurrent namespace walks. The interpreter must be
613 * released during the deletion since the acquisition of the deletion
614 * lock may block, and also since the execution of a namespace walk
615 * must be allowed to use the interpreter.
616 */
617 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
618 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
619
620 acpi_ns_delete_namespace_by_owner(owner_id);
621 if (ACPI_FAILURE(status)) {
622 return_ACPI_STATUS(status);
623 }
624
625 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
626
627 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
628 return_ACPI_STATUS(status);
629}
630
631/*******************************************************************************
632 *
633 * FUNCTION: acpi_tb_allocate_owner_id
634 *
635 * PARAMETERS: table_index - Table index
636 *
637 * RETURN: Status
638 *
639 * DESCRIPTION: Allocates owner_id in table_desc
640 *
641 ******************************************************************************/
642
643acpi_status acpi_tb_allocate_owner_id(u32 table_index)
644{
645 acpi_status status = AE_BAD_PARAMETER;
646
647 ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
648
649 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
650 if (table_index < acpi_gbl_root_table_list.current_table_count) {
651 status =
652 acpi_ut_allocate_owner_id(&
653 (acpi_gbl_root_table_list.
654 tables[table_index].owner_id));
655 }
656
657 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
658 return_ACPI_STATUS(status);
659}
660
661/*******************************************************************************
662 *
663 * FUNCTION: acpi_tb_release_owner_id
664 *
665 * PARAMETERS: table_index - Table index
666 *
667 * RETURN: Status
668 *
669 * DESCRIPTION: Releases owner_id in table_desc
670 *
671 ******************************************************************************/
672
673acpi_status acpi_tb_release_owner_id(u32 table_index)
674{
675 acpi_status status = AE_BAD_PARAMETER;
676
677 ACPI_FUNCTION_TRACE(tb_release_owner_id);
678
679 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
680 if (table_index < acpi_gbl_root_table_list.current_table_count) {
681 acpi_ut_release_owner_id(&
682 (acpi_gbl_root_table_list.
683 tables[table_index].owner_id));
684 status = AE_OK;
685 }
686
687 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
688 return_ACPI_STATUS(status);
689}
690
691/*******************************************************************************
692 *
693 * FUNCTION: acpi_tb_get_owner_id
694 *
695 * PARAMETERS: table_index - Table index
696 * owner_id - Where the table owner_id is returned
697 *
698 * RETURN: Status
699 *
700 * DESCRIPTION: returns owner_id for the ACPI table
701 *
702 ******************************************************************************/
703
704acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id * owner_id)
705{
706 acpi_status status = AE_BAD_PARAMETER;
707
708 ACPI_FUNCTION_TRACE(tb_get_owner_id);
709
710 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
711 if (table_index < acpi_gbl_root_table_list.current_table_count) {
712 *owner_id =
713 acpi_gbl_root_table_list.tables[table_index].owner_id;
714 status = AE_OK;
715 }
716
717 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
718 return_ACPI_STATUS(status);
719}
720
721/*******************************************************************************
722 *
723 * FUNCTION: acpi_tb_is_table_loaded
724 *
725 * PARAMETERS: table_index - Index into the root table
726 *
727 * RETURN: Table Loaded Flag
728 *
729 ******************************************************************************/
730
731u8 acpi_tb_is_table_loaded(u32 table_index)
732{
733 u8 is_loaded = FALSE;
734
735 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
736 if (table_index < acpi_gbl_root_table_list.current_table_count) {
737 is_loaded = (u8)
738 (acpi_gbl_root_table_list.tables[table_index].flags &
739 ACPI_TABLE_IS_LOADED);
740 }
741
742 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
743 return (is_loaded);
744}
745
746/*******************************************************************************
747 *
748 * FUNCTION: acpi_tb_set_table_loaded_flag
749 *
750 * PARAMETERS: table_index - Table index
751 * is_loaded - TRUE if table is loaded, FALSE otherwise
752 *
753 * RETURN: None
754 *
755 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
756 *
757 ******************************************************************************/
758
759void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
760{
761
762 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
763 if (table_index < acpi_gbl_root_table_list.current_table_count) {
764 if (is_loaded) {
765 acpi_gbl_root_table_list.tables[table_index].flags |=
766 ACPI_TABLE_IS_LOADED;
767 } else {
768 acpi_gbl_root_table_list.tables[table_index].flags &=
769 ~ACPI_TABLE_IS_LOADED;
770 }
771 }
772
773 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
774}