summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/dbinput.c
blob: 32e4f0c6b5dfbf4eef4d74359a7d17203addb0a3 (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
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
 *
 * Module Name: dbinput - user front-end to the AML debugger
 *
 ******************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acdebug.h"

#ifdef ACPI_APPLICATION
#include "acapps.h"
#endif

#define _COMPONENT          ACPI_CA_DEBUGGER
ACPI_MODULE_NAME("dbinput")

/* Local prototypes */
static u32 acpi_db_get_line(char *input_buffer);

static u32 acpi_db_match_command(char *user_command);

static void acpi_db_display_command_info(const char *command, u8 display_all);

static void acpi_db_display_help(char *command);

static u8
acpi_db_match_command_help(const char *command,
			   const struct acpi_db_command_help *help);

/*
 * Top-level debugger commands.
 *
 * This list of commands must match the string table below it
 */
enum acpi_ex_debugger_commands {
	CMD_NOT_FOUND = 0,
	CMD_NULL,
	CMD_ALLOCATIONS,
	CMD_ARGS,
	CMD_ARGUMENTS,
	CMD_BREAKPOINT,
	CMD_BUSINFO,
	CMD_CALL,
	CMD_DEBUG,
	CMD_DISASSEMBLE,
	CMD_DISASM,
	CMD_DUMP,
	CMD_EVALUATE,
	CMD_EXECUTE,
	CMD_EXIT,
	CMD_FIND,
	CMD_GO,
	CMD_HANDLERS,
	CMD_HELP,
	CMD_HELP2,
	CMD_HISTORY,
	CMD_HISTORY_EXE,
	CMD_HISTORY_LAST,
	CMD_INFORMATION,
	CMD_INTEGRITY,
	CMD_INTO,
	CMD_LEVEL,
	CMD_LIST,
	CMD_LOCALS,
	CMD_LOCKS,
	CMD_METHODS,
	CMD_NAMESPACE,
	CMD_NOTIFY,
	CMD_OBJECTS,
	CMD_OSI,
	CMD_OWNER,
	CMD_PATHS,
	CMD_PREDEFINED,
	CMD_PREFIX,
	CMD_QUIT,
	CMD_REFERENCES,
	CMD_RESOURCES,
	CMD_RESULTS,
	CMD_SET,
	CMD_STATS,
	CMD_STOP,
	CMD_TABLES,
	CMD_TEMPLATE,
	CMD_TRACE,
	CMD_TREE,
	CMD_TYPE,
#ifdef ACPI_APPLICATION
	CMD_ENABLEACPI,
	CMD_EVENT,
	CMD_GPE,
	CMD_GPES,
	CMD_SCI,
	CMD_SLEEP,

	CMD_CLOSE,
	CMD_LOAD,
	CMD_OPEN,
	CMD_UNLOAD,

	CMD_TERMINATE,
	CMD_BACKGROUND,
	CMD_THREADS,

	CMD_TEST,
#endif
};

#define CMD_FIRST_VALID     2

/* Second parameter is the required argument count */

static const struct acpi_db_command_info acpi_gbl_db_commands[] = {
	{"<NOT FOUND>", 0},
	{"<NULL>", 0},
	{"ALLOCATIONS", 0},
	{"ARGS", 0},
	{"ARGUMENTS", 0},
	{"BREAKPOINT", 1},
	{"BUSINFO", 0},
	{"CALL", 0},
	{"DEBUG", 1},
	{"DISASSEMBLE", 1},
	{"DISASM", 1},
	{"DUMP", 1},
	{"EVALUATE", 1},
	{"EXECUTE", 1},
	{"EXIT", 0},
	{"FIND", 1},
	{"GO", 0},
	{"HANDLERS", 0},
	{"HELP", 0},
	{"?", 0},
	{"HISTORY", 0},
	{"!", 1},
	{"!!", 0},
	{"INFORMATION", 0},
	{"INTEGRITY", 0},
	{"INTO", 0},
	{"LEVEL", 0},
	{"LIST", 0},
	{"LOCALS", 0},
	{"LOCKS", 0},
	{"METHODS", 0},
	{"NAMESPACE", 0},
	{"NOTIFY", 2},
	{"OBJECTS", 0},
	{"OSI", 0},
	{"OWNER", 1},
	{"PATHS", 0},
	{"PREDEFINED", 0},
	{"PREFIX", 0},
	{"QUIT", 0},
	{"REFERENCES", 1},
	{"RESOURCES", 0},
	{"RESULTS", 0},
	{"SET", 3},
	{"STATS", 1},
	{"STOP", 0},
	{"TABLES", 0},
	{"TEMPLATE", 1},
	{"TRACE", 1},
	{"TREE", 0},
	{"TYPE", 1},
#ifdef ACPI_APPLICATION
	{"ENABLEACPI", 0},
	{"EVENT", 1},
	{"GPE", 1},
	{"GPES", 0},
	{"SCI", 0},
	{"SLEEP", 0},

	{"CLOSE", 0},
	{"LOAD", 1},
	{"OPEN", 1},
	{"UNLOAD", 1},

	{"TERMINATE", 0},
	{"BACKGROUND", 1},
	{"THREADS", 3},

	{"TEST", 1},
#endif
	{NULL, 0}
};

/*
 * Help for all debugger commands. First argument is the number of lines
 * of help to output for the command.
 *
 * Note: Some commands are not supported by the kernel-level version of
 * the debugger.
 */
static const struct acpi_db_command_help acpi_gbl_db_command_help[] = {
	{0, "\nNamespace Access:", "\n"},
	{1, "  Businfo", "Display system bus info\n"},
	{1, "  Disassemble <Method>", "Disassemble a control method\n"},
	{1, "  Find <AcpiName> (? is wildcard)",
	 "Find ACPI name(s) with wildcards\n"},
	{1, "  Integrity", "Validate namespace integrity\n"},
	{1, "  Methods", "Display list of loaded control methods\n"},
	{1, "  Namespace [Object] [Depth]",
	 "Display loaded namespace tree/subtree\n"},
	{1, "  Notify <Object> <Value>", "Send a notification on Object\n"},
	{1, "  Objects [ObjectType]",
	 "Display summary of all objects or just given type\n"},
	{1, "  Owner <OwnerId> [Depth]",
	 "Display loaded namespace by object owner\n"},
	{1, "  Paths", "Display full pathnames of namespace objects\n"},
	{1, "  Predefined", "Check all predefined names\n"},
	{1, "  Prefix [<Namepath>]", "Set or Get current execution prefix\n"},
	{1, "  References <Addr>", "Find all references to object at addr\n"},
	{1, "  Resources [DeviceName]",
	 "Display Device resources (no arg = all devices)\n"},
	{1, "  Set N <NamedObject> <Value>", "Set value for named integer\n"},
	{1, "  Template <Object>", "Format/dump a Buffer/ResourceTemplate\n"},
	{1, "  Type <Object>", "Display object type\n"},

	{0, "\nControl Method Execution:", "\n"},
	{1, "  Evaluate <Namepath> [Arguments]",
	 "Evaluate object or control method\n"},
	{1, "  Execute <Namepath> [Arguments]", "Synonym for Evaluate\n"},
#ifdef ACPI_APPLICATION
	{1, "  Background <Namepath> [Arguments]",
	 "Evaluate object/method in a separate thread\n"},
	{1, "  Thread <Threads><Loops><NamePath>",
	 "Spawn threads to execute method(s)\n"},
#endif
	{1, "  Debug <Namepath> [Arguments]", "Single-Step a control method\n"},
	{7, "  [Arguments] formats:", "Control method argument formats\n"},
	{1, "     Hex Integer", "Integer\n"},
	{1, "     \"Ascii String\"", "String\n"},
	{1, "     (Hex Byte List)", "Buffer\n"},
	{1, "         (01 42 7A BF)", "Buffer example (4 bytes)\n"},
	{1, "     [Package Element List]", "Package\n"},
	{1, "         [0x01 0x1234 \"string\"]",
	 "Package example (3 elements)\n"},

	{0, "\nMiscellaneous:", "\n"},
	{1, "  Allocations", "Display list of current memory allocations\n"},
	{2, "  Dump <Address>|<Namepath>", "\n"},
	{0, "       [Byte|Word|Dword|Qword]",
	 "Display ACPI objects or memory\n"},
	{1, "  Handlers", "Info about global handlers\n"},
	{1, "  Help [Command]", "This help screen or individual command\n"},
	{1, "  History", "Display command history buffer\n"},
	{1, "  Level <DebugLevel>] [console]",
	 "Get/Set debug level for file or console\n"},
	{1, "  Locks", "Current status of internal mutexes\n"},
	{1, "  Osi [Install|Remove <name>]",
	 "Display or modify global _OSI list\n"},
	{1, "  Quit or Exit", "Exit this command\n"},
	{8, "  Stats <SubCommand>",
	 "Display namespace and memory statistics\n"},
	{1, "     Allocations", "Display list of current memory allocations\n"},
	{1, "     Memory", "Dump internal memory lists\n"},
	{1, "     Misc", "Namespace search and mutex stats\n"},
	{1, "     Objects", "Summary of namespace objects\n"},
	{1, "     Sizes", "Sizes for each of the internal objects\n"},
	{1, "     Stack", "Display CPU stack usage\n"},
	{1, "     Tables", "Info about current ACPI table(s)\n"},
	{1, "  Tables", "Display info about loaded ACPI tables\n"},
#ifdef ACPI_APPLICATION
	{1, "  Terminate", "Delete namespace and all internal objects\n"},
#endif
	{1, "  ! <CommandNumber>", "Execute command from history buffer\n"},
	{1, "  !!", "Execute last command again\n"},

	{0, "\nMethod and Namespace Debugging:", "\n"},
	{5, "  Trace <State> [<Namepath>] [Once]",
	 "Trace control method execution\n"},
	{1, "     Enable", "Enable all messages\n"},
	{1, "     Disable", "Disable tracing\n"},
	{1, "     Method", "Enable method execution messages\n"},
	{1, "     Opcode", "Enable opcode execution messages\n"},
	{3, "  Test <TestName>", "Invoke a debug test\n"},
	{1, "     Objects", "Read/write/compare all namespace data objects\n"},
	{1, "     Predefined",
	 "Validate all ACPI predefined names (_STA, etc.)\n"},
	{1, "  Execute predefined",
	 "Execute all predefined (public) methods\n"},

	{0, "\nControl Method Single-Step Execution:", "\n"},
	{1, "  Arguments (or Args)", "Display method arguments\n"},
	{1, "  Breakpoint <AmlOffset>", "Set an AML execution breakpoint\n"},
	{1, "  Call", "Run to next control method invocation\n"},
	{1, "  Go", "Allow method to run to completion\n"},
	{1, "  Information", "Display info about the current method\n"},
	{1, "  Into", "Step into (not over) a method call\n"},
	{1, "  List [# of Aml Opcodes]", "Display method ASL statements\n"},
	{1, "  Locals", "Display method local variables\n"},
	{1, "  Results", "Display method result stack\n"},
	{1, "  Set <A|L> <#> <Value>", "Set method data (Arguments/Locals)\n"},
	{1, "  Stop", "Terminate control method\n"},
	{1, "  Tree", "Display control method calling tree\n"},
	{1, "  <Enter>", "Single step next AML opcode (over calls)\n"},

#ifdef ACPI_APPLICATION
	{0, "\nFile Operations:", "\n"},
	{1, "  Close", "Close debug output file\n"},
	{1, "  Load <Input Filename>", "Load ACPI table from a file\n"},
	{1, "  Open <Output Filename>", "Open a file for debug output\n"},
	{1, "  Unload <Namepath>",
	 "Unload an ACPI table via namespace object\n"},

	{0, "\nHardware Simulation:", "\n"},
	{1, "  EnableAcpi", "Enable ACPI (hardware) mode\n"},
	{1, "  Event <F|G> <Value>", "Generate AcpiEvent (Fixed/GPE)\n"},
	{1, "  Gpe <GpeNum> [GpeBlockDevice]", "Simulate a GPE\n"},
	{1, "  Gpes", "Display info on all GPE devices\n"},
	{1, "  Sci", "Generate an SCI\n"},
	{1, "  Sleep [SleepState]", "Simulate sleep/wake sequence(s) (0-5)\n"},
#endif
	{0, NULL, NULL}
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_match_command_help
 *
 * PARAMETERS:  command             - Command string to match
 *              help                - Help table entry to attempt match
 *
 * RETURN:      TRUE if command matched, FALSE otherwise
 *
 * DESCRIPTION: Attempt to match a command in the help table in order to
 *              print help information for a single command.
 *
 ******************************************************************************/

static u8
acpi_db_match_command_help(const char *command,
			   const struct acpi_db_command_help *help)
{
	char *invocation = help->invocation;
	u32 line_count;

	/* Valid commands in the help table begin with a couple of spaces */

	if (*invocation != ' ') {
		return (FALSE);
	}

	while (*invocation == ' ') {
		invocation++;
	}

	/* Match command name (full command or substring) */

	while ((*command) && (*invocation) && (*invocation != ' ')) {
		if (tolower((int)*command) != tolower((int)*invocation)) {
			return (FALSE);
		}

		invocation++;
		command++;
	}

	/* Print the appropriate number of help lines */

	line_count = help->line_count;
	while (line_count) {
		acpi_os_printf("%-38s : %s", help->invocation,
			       help->description);
		help++;
		line_count--;
	}

	return (TRUE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_display_command_info
 *
 * PARAMETERS:  command             - Command string to match
 *              display_all         - Display all matching commands, or just
 *                                    the first one (substring match)
 *
 * RETURN:      None
 *
 * DESCRIPTION: Display help information for a Debugger command.
 *
 ******************************************************************************/

static void acpi_db_display_command_info(const char *command, u8 display_all)
{
	const struct acpi_db_command_help *next;
	u8 matched;

	next = acpi_gbl_db_command_help;
	while (next->invocation) {
		matched = acpi_db_match_command_help(command, next);
		if (!display_all && matched) {
			return;
		}

		next++;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_display_help
 *
 * PARAMETERS:  command             - Optional command string to display help.
 *                                    if not specified, all debugger command
 *                                    help strings are displayed
 *
 * RETURN:      None
 *
 * DESCRIPTION: Display help for a single debugger command, or all of them.
 *
 ******************************************************************************/

static void acpi_db_display_help(char *command)
{
	const struct acpi_db_command_help *next = acpi_gbl_db_command_help;

	if (!command) {

		/* No argument to help, display help for all commands */

		acpi_os_printf("\nSummary of AML Debugger Commands\n\n");

		while (next->invocation) {
			acpi_os_printf("%-38s%s", next->invocation,
				       next->description);
			next++;
		}
		acpi_os_printf("\n");

	} else {
		/* Display help for all commands that match the subtring */

		acpi_db_display_command_info(command, TRUE);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_get_next_token
 *
 * PARAMETERS:  string          - Command buffer
 *              next            - Return value, end of next token
 *
 * RETURN:      Pointer to the start of the next token.
 *
 * DESCRIPTION: Command line parsing. Get the next token on the command line
 *
 ******************************************************************************/

char *acpi_db_get_next_token(char *string,
			     char **next, acpi_object_type *return_type)
{
	char *start;
	u32 depth;
	acpi_object_type type = ACPI_TYPE_INTEGER;

	/* At end of buffer? */

	if (!string || !(*string)) {
		return (NULL);
	}

	/* Remove any spaces at the beginning */

	if (*string == ' ') {
		while (*string && (*string == ' ')) {
			string++;
		}

		if (!(*string)) {
			return (NULL);
		}
	}

	switch (*string) {
	case '"':

		/* This is a quoted string, scan until closing quote */

		string++;
		start = string;
		type = ACPI_TYPE_STRING;

		/* Find end of string */

		while (*string && (*string != '"')) {
			string++;
		}
		break;

	case '(':

		/* This is the start of a buffer, scan until closing paren */

		string++;
		start = string;
		type = ACPI_TYPE_BUFFER;

		/* Find end of buffer */

		while (*string && (*string != ')')) {
			string++;
		}
		break;

	case '[':

		/* This is the start of a package, scan until closing bracket */

		string++;
		depth = 1;
		start = string;
		type = ACPI_TYPE_PACKAGE;

		/* Find end of package (closing bracket) */

		while (*string) {

			/* Handle String package elements */

			if (*string == '"') {
				/* Find end of string */

				string++;
				while (*string && (*string != '"')) {
					string++;
				}
				if (!(*string)) {
					break;
				}
			} else if (*string == '[') {
				depth++;	/* A nested package declaration */
			} else if (*string == ']') {
				depth--;
				if (depth == 0) {	/* Found final package closing bracket */
					break;
				}
			}

			string++;
		}
		break;

	default:

		start = string;

		/* Find end of token */

		while (*string && (*string != ' ')) {
			string++;
		}
		break;
	}

	if (!(*string)) {
		*next = NULL;
	} else {
		*string = 0;
		*next = string + 1;
	}

	*return_type = type;
	return (start);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_get_line
 *
 * PARAMETERS:  input_buffer        - Command line buffer
 *
 * RETURN:      Count of arguments to the command
 *
 * DESCRIPTION: Get the next command line from the user. Gets entire line
 *              up to the next newline
 *
 ******************************************************************************/

static u32 acpi_db_get_line(char *input_buffer)
{
	u32 i;
	u32 count;
	char *next;
	char *this;

	if (acpi_ut_safe_strcpy
	    (acpi_gbl_db_parsed_buf, sizeof(acpi_gbl_db_parsed_buf),
	     input_buffer)) {
		acpi_os_printf
		    ("Buffer overflow while parsing input line (max %u characters)\n",
		     (u32)sizeof(acpi_gbl_db_parsed_buf));
		return (0);
	}

	this = acpi_gbl_db_parsed_buf;
	for (i = 0; i < ACPI_DEBUGGER_MAX_ARGS; i++) {
		acpi_gbl_db_args[i] = acpi_db_get_next_token(this, &next,
							     &acpi_gbl_db_arg_types
							     [i]);
		if (!acpi_gbl_db_args[i]) {
			break;
		}

		this = next;
	}

	/* Uppercase the actual command */

	acpi_ut_strupr(acpi_gbl_db_args[0]);

	count = i;
	if (count) {
		count--;	/* Number of args only */
	}

	return (count);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_match_command
 *
 * PARAMETERS:  user_command            - User command line
 *
 * RETURN:      Index into command array, -1 if not found
 *
 * DESCRIPTION: Search command array for a command match
 *
 ******************************************************************************/

static u32 acpi_db_match_command(char *user_command)
{
	u32 i;

	if (!user_command || user_command[0] == 0) {
		return (CMD_NULL);
	}

	for (i = CMD_FIRST_VALID; acpi_gbl_db_commands[i].name; i++) {
		if (strstr
		    (ACPI_CAST_PTR(char, acpi_gbl_db_commands[i].name),
		     user_command) == acpi_gbl_db_commands[i].name) {
			return (i);
		}
	}

	/* Command not recognized */

	return (CMD_NOT_FOUND);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_command_dispatch
 *
 * PARAMETERS:  input_buffer        - Command line buffer
 *              walk_state          - Current walk
 *              op                  - Current (executing) parse op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Command dispatcher.
 *
 ******************************************************************************/

acpi_status
acpi_db_command_dispatch(char *input_buffer,
			 struct acpi_walk_state *walk_state,
			 union acpi_parse_object *op)
{
	u32 temp;
	u32 command_index;
	u32 param_count;
	char *command_line;
	acpi_status status = AE_CTRL_TRUE;

	/* If acpi_terminate has been called, terminate this thread */

	if (acpi_gbl_db_terminate_loop) {
		return (AE_CTRL_TERMINATE);
	}

	/* Find command and add to the history buffer */

	param_count = acpi_db_get_line(input_buffer);
	command_index = acpi_db_match_command(acpi_gbl_db_args[0]);
	temp = 0;

	/*
	 * We don't want to add the !! command to the history buffer. It
	 * would cause an infinite loop because it would always be the
	 * previous command.
	 */
	if (command_index != CMD_HISTORY_LAST) {
		acpi_db_add_to_history(input_buffer);
	}

	/* Verify that we have the minimum number of params */

	if (param_count < acpi_gbl_db_commands[command_index].min_args) {
		acpi_os_printf
		    ("%u parameters entered, [%s] requires %u parameters\n",
		     param_count, acpi_gbl_db_commands[command_index].name,
		     acpi_gbl_db_commands[command_index].min_args);

		acpi_db_display_command_info(acpi_gbl_db_commands
					     [command_index].name, FALSE);
		return (AE_CTRL_TRUE);
	}

	/* Decode and dispatch the command */

	switch (command_index) {
	case CMD_NULL:

		if (op) {
			return (AE_OK);
		}
		break;

	case CMD_ALLOCATIONS:

#ifdef ACPI_DBG_TRACK_ALLOCATIONS
		acpi_ut_dump_allocations((u32)-1, NULL);
#endif
		break;

	case CMD_ARGS:
	case CMD_ARGUMENTS:

		acpi_db_display_arguments();
		break;

	case CMD_BREAKPOINT:

		acpi_db_set_method_breakpoint(acpi_gbl_db_args[1], walk_state,
					      op);
		break;

	case CMD_BUSINFO:

		acpi_db_get_bus_info();
		break;

	case CMD_CALL:

		acpi_db_set_method_call_breakpoint(op);
		status = AE_OK;
		break;

	case CMD_DEBUG:

		acpi_db_execute(acpi_gbl_db_args[1],
				&acpi_gbl_db_args[2], &acpi_gbl_db_arg_types[2],
				EX_SINGLE_STEP);
		break;

	case CMD_DISASSEMBLE:
	case CMD_DISASM:

#ifdef ACPI_DISASSEMBLER
		(void)acpi_db_disassemble_method(acpi_gbl_db_args[1]);
#else
		acpi_os_printf
		    ("The AML Disassembler is not configured/present\n");
#endif
		break;

	case CMD_DUMP:

		acpi_db_decode_and_display_object(acpi_gbl_db_args[1],
						  acpi_gbl_db_args[2]);
		break;

	case CMD_EVALUATE:
	case CMD_EXECUTE:

		acpi_db_execute(acpi_gbl_db_args[1],
				&acpi_gbl_db_args[2], &acpi_gbl_db_arg_types[2],
				EX_NO_SINGLE_STEP);
		break;

	case CMD_FIND:

		status = acpi_db_find_name_in_namespace(acpi_gbl_db_args[1]);
		break;

	case CMD_GO:

		acpi_gbl_cm_single_step = FALSE;
		return (AE_OK);

	case CMD_HANDLERS:

		acpi_db_display_handlers();
		break;

	case CMD_HELP:
	case CMD_HELP2:

		acpi_db_display_help(acpi_gbl_db_args[1]);
		break;

	case CMD_HISTORY:

		acpi_db_display_history();
		break;

	case CMD_HISTORY_EXE:	/* ! command */

		command_line = acpi_db_get_from_history(acpi_gbl_db_args[1]);
		if (!command_line) {
			return (AE_CTRL_TRUE);
		}

		status = acpi_db_command_dispatch(command_line, walk_state, op);
		return (status);

	case CMD_HISTORY_LAST:	/* !! command */

		command_line = acpi_db_get_from_history(NULL);
		if (!command_line) {
			return (AE_CTRL_TRUE);
		}

		status = acpi_db_command_dispatch(command_line, walk_state, op);
		return (status);

	case CMD_INFORMATION:

		acpi_db_display_method_info(op);
		break;

	case CMD_INTEGRITY:

		acpi_db_check_integrity();
		break;

	case CMD_INTO:

		if (op) {
			acpi_gbl_cm_single_step = TRUE;
			return (AE_OK);
		}
		break;

	case CMD_LEVEL:

		if (param_count == 0) {
			acpi_os_printf
			    ("Current debug level for file output is:    %8.8lX\n",
			     acpi_gbl_db_debug_level);
			acpi_os_printf
			    ("Current debug level for console output is: %8.8lX\n",
			     acpi_gbl_db_console_debug_level);
		} else if (param_count == 2) {
			temp = acpi_gbl_db_console_debug_level;
			acpi_gbl_db_console_debug_level =
			    strtoul(acpi_gbl_db_args[1], NULL, 16);
			acpi_os_printf
			    ("Debug Level for console output was %8.8lX, now %8.8lX\n",
			     temp, acpi_gbl_db_console_debug_level);
		} else {
			temp = acpi_gbl_db_debug_level;
			acpi_gbl_db_debug_level =
			    strtoul(acpi_gbl_db_args[1], NULL, 16);
			acpi_os_printf
			    ("Debug Level for file output was %8.8lX, now %8.8lX\n",
			     temp, acpi_gbl_db_debug_level);
		}
		break;

	case CMD_LIST:

#ifdef ACPI_DISASSEMBLER
		acpi_db_disassemble_aml(acpi_gbl_db_args[1], op);
#else
		acpi_os_printf
		    ("The AML Disassembler is not configured/present\n");
#endif
		break;

	case CMD_LOCKS:

		acpi_db_display_locks();
		break;

	case CMD_LOCALS:

		acpi_db_display_locals();
		break;

	case CMD_METHODS:

		status = acpi_db_display_objects("METHOD", acpi_gbl_db_args[1]);
		break;

	case CMD_NAMESPACE:

		acpi_db_dump_namespace(acpi_gbl_db_args[1],
				       acpi_gbl_db_args[2]);
		break;

	case CMD_NOTIFY:

		temp = strtoul(acpi_gbl_db_args[2], NULL, 0);
		acpi_db_send_notify(acpi_gbl_db_args[1], temp);
		break;

	case CMD_OBJECTS:

		acpi_ut_strupr(acpi_gbl_db_args[1]);
		status =
		    acpi_db_display_objects(acpi_gbl_db_args[1],
					    acpi_gbl_db_args[2]);
		break;

	case CMD_OSI:

		acpi_db_display_interfaces(acpi_gbl_db_args[1],
					   acpi_gbl_db_args[2]);
		break;

	case CMD_OWNER:

		acpi_db_dump_namespace_by_owner(acpi_gbl_db_args[1],
						acpi_gbl_db_args[2]);
		break;

	case CMD_PATHS:

		acpi_db_dump_namespace_paths();
		break;

	case CMD_PREFIX:

		acpi_db_set_scope(acpi_gbl_db_args[1]);
		break;

	case CMD_REFERENCES:

		acpi_db_find_references(acpi_gbl_db_args[1]);
		break;

	case CMD_RESOURCES:

		acpi_db_display_resources(acpi_gbl_db_args[1]);
		break;

	case CMD_RESULTS:

		acpi_db_display_results();
		break;

	case CMD_SET:

		acpi_db_set_method_data(acpi_gbl_db_args[1],
					acpi_gbl_db_args[2],
					acpi_gbl_db_args[3]);
		break;

	case CMD_STATS:

		status = acpi_db_display_statistics(acpi_gbl_db_args[1]);
		break;

	case CMD_STOP:

		return (AE_NOT_IMPLEMENTED);

	case CMD_TABLES:

		acpi_db_display_table_info(acpi_gbl_db_args[1]);
		break;

	case CMD_TEMPLATE:

		acpi_db_display_template(acpi_gbl_db_args[1]);
		break;

	case CMD_TRACE:

		acpi_db_trace(acpi_gbl_db_args[1], acpi_gbl_db_args[2],
			      acpi_gbl_db_args[3]);
		break;

	case CMD_TREE:

		acpi_db_display_calling_tree();
		break;

	case CMD_TYPE:

		acpi_db_display_object_type(acpi_gbl_db_args[1]);
		break;

#ifdef ACPI_APPLICATION

		/* Hardware simulation commands. */

	case CMD_ENABLEACPI:
#if (!ACPI_REDUCED_HARDWARE)

		status = acpi_enable();
		if (ACPI_FAILURE(status)) {
			acpi_os_printf("AcpiEnable failed (Status=%X)\n",
				       status);
			return (status);
		}
#endif				/* !ACPI_REDUCED_HARDWARE */
		break;

	case CMD_EVENT:

		acpi_os_printf("Event command not implemented\n");
		break;

	case CMD_GPE:

		acpi_db_generate_gpe(acpi_gbl_db_args[1], acpi_gbl_db_args[2]);
		break;

	case CMD_GPES:

		acpi_db_display_gpes();
		break;

	case CMD_SCI:

		acpi_db_generate_sci();
		break;

	case CMD_SLEEP:

		status = acpi_db_sleep(acpi_gbl_db_args[1]);
		break;

		/* File I/O commands. */

	case CMD_CLOSE:

		acpi_db_close_debug_file();
		break;

	case CMD_LOAD:{
			struct acpi_new_table_desc *list_head = NULL;

			status =
			    ac_get_all_tables_from_file(acpi_gbl_db_args[1],
							ACPI_GET_ALL_TABLES,
							&list_head);
			if (ACPI_SUCCESS(status)) {
				acpi_db_load_tables(list_head);
			}
		}
		break;

	case CMD_OPEN:

		acpi_db_open_debug_file(acpi_gbl_db_args[1]);
		break;

		/* User space commands. */

	case CMD_TERMINATE:

		acpi_db_set_output_destination(ACPI_DB_REDIRECTABLE_OUTPUT);
		acpi_ut_subsystem_shutdown();

		/*
		 * TBD: [Restructure] Need some way to re-initialize without
		 * re-creating the semaphores!
		 */

		acpi_gbl_db_terminate_loop = TRUE;
		/*  acpi_initialize (NULL); */
		break;

	case CMD_BACKGROUND:

		acpi_db_create_execution_thread(acpi_gbl_db_args[1],
						&acpi_gbl_db_args[2],
						&acpi_gbl_db_arg_types[2]);
		break;

	case CMD_THREADS:

		acpi_db_create_execution_threads(acpi_gbl_db_args[1],
						 acpi_gbl_db_args[2],
						 acpi_gbl_db_args[3]);
		break;

		/* Debug test commands. */

	case CMD_PREDEFINED:

		acpi_db_check_predefined_names();
		break;

	case CMD_TEST:

		acpi_db_execute_test(acpi_gbl_db_args[1]);
		break;

	case CMD_UNLOAD:

		acpi_db_unload_acpi_table(acpi_gbl_db_args[1]);
		break;
#endif

	case CMD_EXIT:
	case CMD_QUIT:

		if (op) {
			acpi_os_printf("Method execution terminated\n");
			return (AE_CTRL_TERMINATE);
		}

		if (!acpi_gbl_db_output_to_file) {
			acpi_dbg_level = ACPI_DEBUG_DEFAULT;
		}
#ifdef ACPI_APPLICATION
		acpi_db_close_debug_file();
#endif
		acpi_gbl_db_terminate_loop = TRUE;
		return (AE_CTRL_TERMINATE);

	case CMD_NOT_FOUND:
	default:

		acpi_os_printf("%s: unknown command\n", acpi_gbl_db_args[0]);
		return (AE_CTRL_TRUE);
	}

	if (ACPI_SUCCESS(status)) {
		status = AE_CTRL_TRUE;
	}

	return (status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_execute_thread
 *
 * PARAMETERS:  context         - Not used
 *
 * RETURN:      None
 *
 * DESCRIPTION: Debugger execute thread. Waits for a command line, then
 *              simply dispatches it.
 *
 ******************************************************************************/

void ACPI_SYSTEM_XFACE acpi_db_execute_thread(void *context)
{

	(void)acpi_db_user_commands();
	acpi_gbl_db_threads_terminated = TRUE;
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_user_commands
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Command line execution for the AML debugger. Commands are
 *              matched and dispatched here.
 *
 ******************************************************************************/

acpi_status acpi_db_user_commands(void)
{
	acpi_status status = AE_OK;

	acpi_os_printf("\n");

	/* TBD: [Restructure] Need a separate command line buffer for step mode */

	while (!acpi_gbl_db_terminate_loop) {

		/* Wait the readiness of the command */

		status = acpi_os_wait_command_ready();
		if (ACPI_FAILURE(status)) {
			break;
		}

		/* Just call to the command line interpreter */

		acpi_gbl_method_executing = FALSE;
		acpi_gbl_step_to_next_call = FALSE;

		(void)acpi_db_command_dispatch(acpi_gbl_db_line_buf, NULL,
					       NULL);

		/* Notify the completion of the command */

		status = acpi_os_notify_command_complete();
		if (ACPI_FAILURE(status)) {
			break;
		}
	}

	if (ACPI_FAILURE(status) && status != AE_CTRL_TERMINATE) {
		ACPI_EXCEPTION((AE_INFO, status, "While parsing command line"));
	}
	return (status);
}