summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/tbdata.c
blob: ebbca109edcb4403c406b9e3f96988aebcc61bc0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: tbdata - Table manager data structure functions
 *
 * Copyright (C) 2000 - 2021, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "actables.h"
#include "acevents.h"

#define _COMPONENT          ACPI_TABLES
ACPI_MODULE_NAME("tbdata")

/* Local prototypes */
static acpi_status
acpi_tb_check_duplication(struct acpi_table_desc *table_desc, u32 *table_index);

static u8
acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_compare_tables
 *
 * PARAMETERS:  table_desc          - Table 1 descriptor to be compared
 *              table_index         - Index of table 2 to be compared
 *
 * RETURN:      TRUE if both tables are identical.
 *
 * DESCRIPTION: This function compares a table with another table that has
 *              already been installed in the root table list.
 *
 ******************************************************************************/

static u8
acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
{
	acpi_status status = AE_OK;
	u8 is_identical;
	struct acpi_table_header *table;
	u32 table_length;
	u8 table_flags;

	status =
	    acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
				  &table, &table_length, &table_flags);
	if (ACPI_FAILURE(status)) {
		return (FALSE);
	}

	/*
	 * Check for a table match on the entire table length,
	 * not just the header.
	 */
	is_identical = (u8)((table_desc->length != table_length ||
			     memcmp(table_desc->pointer, table, table_length)) ?
			    FALSE : TRUE);

	/* Release the acquired table */

	acpi_tb_release_table(table, table_length, table_flags);
	return (is_identical);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_init_table_descriptor
 *
 * PARAMETERS:  table_desc              - Table descriptor
 *              address                 - Physical address of the table
 *              flags                   - Allocation flags of the table
 *              table                   - Pointer to the table
 *
 * RETURN:      None
 *
 * DESCRIPTION: Initialize a new table descriptor
 *
 ******************************************************************************/

void
acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
			      acpi_physical_address address,
			      u8 flags, struct acpi_table_header *table)
{

	/*
	 * Initialize the table descriptor. Set the pointer to NULL, since the
	 * table is not fully mapped at this time.
	 */
	memset(table_desc, 0, sizeof(struct acpi_table_desc));
	table_desc->address = address;
	table_desc->length = table->length;
	table_desc->flags = flags;
	ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_acquire_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *              table_ptr           - Where table is returned
 *              table_length        - Where table length is returned
 *              table_flags         - Where table allocation flags are returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
 *              maintained in the acpi_gbl_root_table_list.
 *
 ******************************************************************************/

acpi_status
acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
		      struct acpi_table_header **table_ptr,
		      u32 *table_length, u8 *table_flags)
{
	struct acpi_table_header *table = NULL;

	switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:

		table =
		    acpi_os_map_memory(table_desc->address, table_desc->length);
		break;

	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:

		table = ACPI_CAST_PTR(struct acpi_table_header,
				      ACPI_PHYSADDR_TO_PTR(table_desc->
							   address));
		break;

	default:

		break;
	}

	/* Table is not valid yet */

	if (!table) {
		return (AE_NO_MEMORY);
	}

	/* Fill the return values */

	*table_ptr = table;
	*table_length = table_desc->length;
	*table_flags = table_desc->flags;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_release_table
 *
 * PARAMETERS:  table               - Pointer for the table
 *              table_length        - Length for the table
 *              table_flags         - Allocation flags for the table
 *
 * RETURN:      None
 *
 * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
 *
 ******************************************************************************/

void
acpi_tb_release_table(struct acpi_table_header *table,
		      u32 table_length, u8 table_flags)
{

	switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:

		acpi_os_unmap_memory(table, table_length);
		break;

	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
	default:

		break;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_acquire_temp_table
 *
 * PARAMETERS:  table_desc          - Table descriptor to be acquired
 *              address             - Address of the table
 *              flags               - Allocation flags of the table
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function validates the table header to obtain the length
 *              of a table and fills the table descriptor to make its state as
 *              "INSTALLED". Such a table descriptor is only used for verified
 *              installation.
 *
 ******************************************************************************/

acpi_status
acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
			   acpi_physical_address address, u8 flags)
{
	struct acpi_table_header *table_header;

	switch (flags & ACPI_TABLE_ORIGIN_MASK) {
	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:

		/* Get the length of the full table from the header */

		table_header =
		    acpi_os_map_memory(address,
				       sizeof(struct acpi_table_header));
		if (!table_header) {
			return (AE_NO_MEMORY);
		}

		acpi_tb_init_table_descriptor(table_desc, address, flags,
					      table_header);
		acpi_os_unmap_memory(table_header,
				     sizeof(struct acpi_table_header));
		return (AE_OK);

	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:

		table_header = ACPI_CAST_PTR(struct acpi_table_header,
					     ACPI_PHYSADDR_TO_PTR(address));
		if (!table_header) {
			return (AE_NO_MEMORY);
		}

		acpi_tb_init_table_descriptor(table_desc, address, flags,
					      table_header);
		return (AE_OK);

	default:

		break;
	}

	/* Table is not valid yet */

	return (AE_NO_MEMORY);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_release_temp_table
 *
 * PARAMETERS:  table_desc          - Table descriptor to be released
 *
 * RETURN:      Status
 *
 * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
 *
 *****************************************************************************/

void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
{

	/*
	 * Note that the .Address is maintained by the callers of
	 * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
	 * where .Address will be freed.
	 */
	acpi_tb_invalidate_table(table_desc);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_tb_validate_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to validate the table, the returned
 *              table descriptor is in "VALIDATED" state.
 *
 *****************************************************************************/

acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
{
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(tb_validate_table);

	/* Validate the table if necessary */

	if (!table_desc->pointer) {
		status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
					       &table_desc->length,
					       &table_desc->flags);
		if (!table_desc->pointer) {
			status = AE_NO_MEMORY;
		}
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_invalidate_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *
 * RETURN:      None
 *
 * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
 *              acpi_tb_validate_table().
 *
 ******************************************************************************/

void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
{

	ACPI_FUNCTION_TRACE(tb_invalidate_table);

	/* Table must be validated */

	if (!table_desc->pointer) {
		return_VOID;
	}

	acpi_tb_release_table(table_desc->pointer, table_desc->length,
			      table_desc->flags);
	table_desc->pointer = NULL;

	return_VOID;
}

/******************************************************************************
 *
 * FUNCTION:    acpi_tb_validate_temp_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to validate the table, the returned
 *              table descriptor is in "VALIDATED" state.
 *
 *****************************************************************************/

acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
{

	if (!table_desc->pointer && !acpi_gbl_enable_table_validation) {
		/*
		 * Only validates the header of the table.
		 * Note that Length contains the size of the mapping after invoking
		 * this work around, this value is required by
		 * acpi_tb_release_temp_table().
		 * We can do this because in acpi_init_table_descriptor(), the Length
		 * field of the installed descriptor is filled with the actual
		 * table length obtaining from the table header.
		 */
		table_desc->length = sizeof(struct acpi_table_header);
	}

	return (acpi_tb_validate_table(table_desc));
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_check_duplication
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *              table_index         - Where the table index is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Avoid installing duplicated tables. However table override and
 *              user aided dynamic table load is allowed, thus comparing the
 *              address of the table is not sufficient, and checking the entire
 *              table content is required.
 *
 ******************************************************************************/

static acpi_status
acpi_tb_check_duplication(struct acpi_table_desc *table_desc, u32 *table_index)
{
	u32 i;

	ACPI_FUNCTION_TRACE(tb_check_duplication);

	/* Check if table is already registered */

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {

		/* Do not compare with unverified tables */

		if (!
		    (acpi_gbl_root_table_list.tables[i].
		     flags & ACPI_TABLE_IS_VERIFIED)) {
			continue;
		}

		/*
		 * Check for a table match on the entire table length,
		 * not just the header.
		 */
		if (!acpi_tb_compare_tables(table_desc, i)) {
			continue;
		}

		/*
		 * Note: the current mechanism does not unregister a table if it is
		 * dynamically unloaded. The related namespace entries are deleted,
		 * but the table remains in the root table list.
		 *
		 * The assumption here is that the number of different tables that
		 * will be loaded is actually small, and there is minimal overhead
		 * in just keeping the table in case it is needed again.
		 *
		 * If this assumption changes in the future (perhaps on large
		 * machines with many table load/unload operations), tables will
		 * need to be unregistered when they are unloaded, and slots in the
		 * root table list should be reused when empty.
		 */
		if (acpi_gbl_root_table_list.tables[i].flags &
		    ACPI_TABLE_IS_LOADED) {

			/* Table is still loaded, this is an error */

			return_ACPI_STATUS(AE_ALREADY_EXISTS);
		} else {
			*table_index = i;
			return_ACPI_STATUS(AE_CTRL_TERMINATE);
		}
	}

	/* Indicate no duplication to the caller */

	return_ACPI_STATUS(AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_tb_verify_temp_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *              signature           - Table signature to verify
 *              table_index         - Where the table index is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to validate and verify the table, the
 *              returned table descriptor is in "VALIDATED" state.
 *              Note that 'TableIndex' is required to be set to !NULL to
 *              enable duplication check.
 *
 *****************************************************************************/

acpi_status
acpi_tb_verify_temp_table(struct acpi_table_desc *table_desc,
			  char *signature, u32 *table_index)
{
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(tb_verify_temp_table);

	/* Validate the table */

	status = acpi_tb_validate_temp_table(table_desc);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* If a particular signature is expected (DSDT/FACS), it must match */

	if (signature &&
	    !ACPI_COMPARE_NAMESEG(&table_desc->signature, signature)) {
		ACPI_BIOS_ERROR((AE_INFO,
				 "Invalid signature 0x%X for ACPI table, expected [%s]",
				 table_desc->signature.integer, signature));
		status = AE_BAD_SIGNATURE;
		goto invalidate_and_exit;
	}

	if (acpi_gbl_enable_table_validation) {

		/* Verify the checksum */

		status =
		    acpi_tb_verify_checksum(table_desc->pointer,
					    table_desc->length);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
					"%4.4s 0x%8.8X%8.8X"
					" Attempted table install failed",
					acpi_ut_valid_nameseg(table_desc->
							      signature.
							      ascii) ?
					table_desc->signature.ascii : "????",
					ACPI_FORMAT_UINT64(table_desc->
							   address)));

			goto invalidate_and_exit;
		}

		/* Avoid duplications */

		if (table_index) {
			status =
			    acpi_tb_check_duplication(table_desc, table_index);
			if (ACPI_FAILURE(status)) {
				if (status != AE_CTRL_TERMINATE) {
					ACPI_EXCEPTION((AE_INFO, status,
							"%4.4s 0x%8.8X%8.8X"
							" Table is already loaded",
							acpi_ut_valid_nameseg
							(table_desc->signature.
							 ascii) ? table_desc->
							signature.
							ascii : "????",
							ACPI_FORMAT_UINT64
							(table_desc->address)));
				}

				goto invalidate_and_exit;
			}
		}

		table_desc->flags |= ACPI_TABLE_IS_VERIFIED;
	}

	return_ACPI_STATUS(status);

invalidate_and_exit:
	acpi_tb_invalidate_table(table_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_resize_root_table_list
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Expand the size of global table array
 *
 ******************************************************************************/

acpi_status acpi_tb_resize_root_table_list(void)
{
	struct acpi_table_desc *tables;
	u32 table_count;
	u32 current_table_count, max_table_count;
	u32 i;

	ACPI_FUNCTION_TRACE(tb_resize_root_table_list);

	/* allow_resize flag is a parameter to acpi_initialize_tables */

	if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
		ACPI_ERROR((AE_INFO,
			    "Resize of Root Table Array is not allowed"));
		return_ACPI_STATUS(AE_SUPPORT);
	}

	/* Increase the Table Array size */

	if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
		table_count = acpi_gbl_root_table_list.max_table_count;
	} else {
		table_count = acpi_gbl_root_table_list.current_table_count;
	}

	max_table_count = table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
	tables = ACPI_ALLOCATE_ZEROED(((acpi_size)max_table_count) *
				      sizeof(struct acpi_table_desc));
	if (!tables) {
		ACPI_ERROR((AE_INFO,
			    "Could not allocate new root table array"));
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Copy and free the previous table array */

	current_table_count = 0;
	if (acpi_gbl_root_table_list.tables) {
		for (i = 0; i < table_count; i++) {
			if (acpi_gbl_root_table_list.tables[i].address) {
				memcpy(tables + current_table_count,
				       acpi_gbl_root_table_list.tables + i,
				       sizeof(struct acpi_table_desc));
				current_table_count++;
			}
		}

		if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
			ACPI_FREE(acpi_gbl_root_table_list.tables);
		}
	}

	acpi_gbl_root_table_list.tables = tables;
	acpi_gbl_root_table_list.max_table_count = max_table_count;
	acpi_gbl_root_table_list.current_table_count = current_table_count;
	acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;

	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_get_next_table_descriptor
 *
 * PARAMETERS:  table_index         - Where table index is returned
 *              table_desc          - Where table descriptor is returned
 *
 * RETURN:      Status and table index/descriptor.
 *
 * DESCRIPTION: Allocate a new ACPI table entry to the global table list
 *
 ******************************************************************************/

acpi_status
acpi_tb_get_next_table_descriptor(u32 *table_index,
				  struct acpi_table_desc **table_desc)
{
	acpi_status status;
	u32 i;

	/* Ensure that there is room for the table in the Root Table List */

	if (acpi_gbl_root_table_list.current_table_count >=
	    acpi_gbl_root_table_list.max_table_count) {
		status = acpi_tb_resize_root_table_list();
		if (ACPI_FAILURE(status)) {
			return (status);
		}
	}

	i = acpi_gbl_root_table_list.current_table_count;
	acpi_gbl_root_table_list.current_table_count++;

	if (table_index) {
		*table_index = i;
	}
	if (table_desc) {
		*table_desc = &acpi_gbl_root_table_list.tables[i];
	}

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_terminate
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete all internal ACPI tables
 *
 ******************************************************************************/

void acpi_tb_terminate(void)
{
	u32 i;

	ACPI_FUNCTION_TRACE(tb_terminate);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	/* Delete the individual tables */

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
		acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
	}

	/*
	 * Delete the root table array if allocated locally. Array cannot be
	 * mapped, so we don't need to check for that flag.
	 */
	if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
		ACPI_FREE(acpi_gbl_root_table_list.tables);
	}

	acpi_gbl_root_table_list.tables = NULL;
	acpi_gbl_root_table_list.flags = 0;
	acpi_gbl_root_table_list.current_table_count = 0;

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_VOID;
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_delete_namespace_by_owner
 *
 * PARAMETERS:  table_index         - Table index
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 *
 ******************************************************************************/

acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
{
	acpi_owner_id owner_id;
	acpi_status status;

	ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);

	status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (table_index >= acpi_gbl_root_table_list.current_table_count) {

		/* The table index does not exist */

		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
		return_ACPI_STATUS(AE_NOT_EXIST);
	}

	/* Get the owner ID for this table, used to delete namespace nodes */

	owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	/*
	 * Need to acquire the namespace writer lock to prevent interference
	 * with any concurrent namespace walks. The interpreter must be
	 * released during the deletion since the acquisition of the deletion
	 * lock may block, and also since the execution of a namespace walk
	 * must be allowed to use the interpreter.
	 */
	status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	acpi_ns_delete_namespace_by_owner(owner_id);
	acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_allocate_owner_id
 *
 * PARAMETERS:  table_index         - Table index
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Allocates owner_id in table_desc
 *
 ******************************************************************************/

acpi_status acpi_tb_allocate_owner_id(u32 table_index)
{
	acpi_status status = AE_BAD_PARAMETER;

	ACPI_FUNCTION_TRACE(tb_allocate_owner_id);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (table_index < acpi_gbl_root_table_list.current_table_count) {
		status =
		    acpi_ut_allocate_owner_id(&
					      (acpi_gbl_root_table_list.
					       tables[table_index].owner_id));
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_release_owner_id
 *
 * PARAMETERS:  table_index         - Table index
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Releases owner_id in table_desc
 *
 ******************************************************************************/

acpi_status acpi_tb_release_owner_id(u32 table_index)
{
	acpi_status status = AE_BAD_PARAMETER;

	ACPI_FUNCTION_TRACE(tb_release_owner_id);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (table_index < acpi_gbl_root_table_list.current_table_count) {
		acpi_ut_release_owner_id(&
					 (acpi_gbl_root_table_list.
					  tables[table_index].owner_id));
		status = AE_OK;
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_get_owner_id
 *
 * PARAMETERS:  table_index         - Table index
 *              owner_id            - Where the table owner_id is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: returns owner_id for the ACPI table
 *
 ******************************************************************************/

acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
{
	acpi_status status = AE_BAD_PARAMETER;

	ACPI_FUNCTION_TRACE(tb_get_owner_id);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (table_index < acpi_gbl_root_table_list.current_table_count) {
		*owner_id =
		    acpi_gbl_root_table_list.tables[table_index].owner_id;
		status = AE_OK;
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_is_table_loaded
 *
 * PARAMETERS:  table_index         - Index into the root table
 *
 * RETURN:      Table Loaded Flag
 *
 ******************************************************************************/

u8 acpi_tb_is_table_loaded(u32 table_index)
{
	u8 is_loaded = FALSE;

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (table_index < acpi_gbl_root_table_list.current_table_count) {
		is_loaded = (u8)
		    (acpi_gbl_root_table_list.tables[table_index].flags &
		     ACPI_TABLE_IS_LOADED);
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return (is_loaded);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_set_table_loaded_flag
 *
 * PARAMETERS:  table_index         - Table index
 *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 *
 * RETURN:      None
 *
 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 *
 ******************************************************************************/

void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
{

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	if (table_index < acpi_gbl_root_table_list.current_table_count) {
		if (is_loaded) {
			acpi_gbl_root_table_list.tables[table_index].flags |=
			    ACPI_TABLE_IS_LOADED;
		} else {
			acpi_gbl_root_table_list.tables[table_index].flags &=
			    ~ACPI_TABLE_IS_LOADED;
		}
	}

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_load_table
 *
 * PARAMETERS:  table_index             - Table index
 *              parent_node             - Where table index is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load an ACPI table
 *
 ******************************************************************************/

acpi_status
acpi_tb_load_table(u32 table_index, struct acpi_namespace_node *parent_node)
{
	struct acpi_table_header *table;
	acpi_status status;
	acpi_owner_id owner_id;

	ACPI_FUNCTION_TRACE(tb_load_table);

	/*
	 * Note: Now table is "INSTALLED", it must be validated before
	 * using.
	 */
	status = acpi_get_table_by_index(table_index, &table);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_ns_load_table(table_index, parent_node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
	 * responsible for discovering any new wake GPEs by running _PRW methods
	 * that may have been loaded by this table.
	 */
	status = acpi_tb_get_owner_id(table_index, &owner_id);
	if (ACPI_SUCCESS(status)) {
		acpi_ev_update_gpes(owner_id);
	}

	/* Invoke table handler */

	acpi_tb_notify_table(ACPI_TABLE_EVENT_LOAD, table);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_install_and_load_table
 *
 * PARAMETERS:  address                 - Physical address of the table
 *              flags                   - Allocation flags of the table
 *              override                - Whether override should be performed
 *              table_index             - Where table index is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Install and load an ACPI table
 *
 ******************************************************************************/

acpi_status
acpi_tb_install_and_load_table(acpi_physical_address address,
			       u8 flags, u8 override, u32 *table_index)
{
	acpi_status status;
	u32 i;

	ACPI_FUNCTION_TRACE(tb_install_and_load_table);

	/* Install the table and load it into the namespace */

	status = acpi_tb_install_standard_table(address, flags, TRUE,
						override, &i);
	if (ACPI_FAILURE(status)) {
		goto exit;
	}

	status = acpi_tb_load_table(i, acpi_gbl_root_node);

exit:
	*table_index = i;
	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL(acpi_tb_install_and_load_table)

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_unload_table
 *
 * PARAMETERS:  table_index             - Table index
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Unload an ACPI table
 *
 ******************************************************************************/

acpi_status acpi_tb_unload_table(u32 table_index)
{
	acpi_status status = AE_OK;
	struct acpi_table_header *table;

	ACPI_FUNCTION_TRACE(tb_unload_table);

	/* Ensure the table is still loaded */

	if (!acpi_tb_is_table_loaded(table_index)) {
		return_ACPI_STATUS(AE_NOT_EXIST);
	}

	/* Invoke table handler */

	status = acpi_get_table_by_index(table_index, &table);
	if (ACPI_SUCCESS(status)) {
		acpi_tb_notify_table(ACPI_TABLE_EVENT_UNLOAD, table);
	}

	/* Delete the portion of the namespace owned by this table */

	status = acpi_tb_delete_namespace_by_owner(table_index);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	(void)acpi_tb_release_owner_id(table_index);
	acpi_tb_set_table_loaded_flag(table_index, FALSE);
	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL(acpi_tb_unload_table)

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_notify_table
 *
 * PARAMETERS:  event               - Table event
 *              table               - Validated table pointer
 *
 * RETURN:      None
 *
 * DESCRIPTION: Notify a table event to the users.
 *
 ******************************************************************************/

void acpi_tb_notify_table(u32 event, void *table)
{
	/* Invoke table handler if present */

	if (acpi_gbl_table_handler) {
		(void)acpi_gbl_table_handler(event, table,
					     acpi_gbl_table_handler_context);
	}
}