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#include <acpi/acpi.h>
54#include "accommon.h"
55#include "acparser.h"
56#include "acdispat.h"
57#include "amlcode.h"
58#include "acinterp.h"
59
60#define _COMPONENT ACPI_PARSER
61ACPI_MODULE_NAME("psparse")
62
63
64
65
66
67
68
69
70
71
72
73
74u32 acpi_ps_get_opcode_size(u32 opcode)
75{
76
77
78
79 if (opcode > 0x00FF) {
80 return (2);
81 }
82
83
84
85 return (1);
86}
87
88
89
90
91
92
93
94
95
96
97
98
99
100u16 acpi_ps_peek_opcode(struct acpi_parse_state * parser_state)
101{
102 u8 *aml;
103 u16 opcode;
104
105 aml = parser_state->aml;
106 opcode = (u16) ACPI_GET8(aml);
107
108 if (opcode == AML_EXTENDED_OP_PREFIX) {
109
110
111
112 aml++;
113 opcode = (u16) ((opcode << 8) | ACPI_GET8(aml));
114 }
115
116 return (opcode);
117}
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132acpi_status
133acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
134 union acpi_parse_object * op)
135{
136 union acpi_parse_object *prev;
137 union acpi_parse_object *next;
138 const struct acpi_opcode_info *parent_info;
139 union acpi_parse_object *replacement_op = NULL;
140 acpi_status status = AE_OK;
141
142 ACPI_FUNCTION_TRACE_PTR(ps_complete_this_op, op);
143
144
145
146 if (!op) {
147 return_ACPI_STATUS(AE_OK);
148 }
149
150
151
152 if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) !=
153 ACPI_PARSE_DELETE_TREE)
154 || (walk_state->op_info->class == AML_CLASS_ARGUMENT)) {
155 return_ACPI_STATUS(AE_OK);
156 }
157
158
159
160 if (op->common.parent) {
161 prev = op->common.parent->common.value.arg;
162 if (!prev) {
163
164
165
166 goto cleanup;
167 }
168
169
170
171
172
173 parent_info =
174 acpi_ps_get_opcode_info(op->common.parent->common.
175 aml_opcode);
176
177 switch (parent_info->class) {
178 case AML_CLASS_CONTROL:
179
180 break;
181
182 case AML_CLASS_CREATE:
183
184
185
186
187 replacement_op =
188 acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
189 if (!replacement_op) {
190 status = AE_NO_MEMORY;
191 }
192 break;
193
194 case AML_CLASS_NAMED_OBJECT:
195
196
197
198
199 if ((op->common.parent->common.aml_opcode ==
200 AML_REGION_OP)
201 || (op->common.parent->common.aml_opcode ==
202 AML_DATA_REGION_OP)
203 || (op->common.parent->common.aml_opcode ==
204 AML_BUFFER_OP)
205 || (op->common.parent->common.aml_opcode ==
206 AML_PACKAGE_OP)
207 || (op->common.parent->common.aml_opcode ==
208 AML_BANK_FIELD_OP)
209 || (op->common.parent->common.aml_opcode ==
210 AML_VAR_PACKAGE_OP)) {
211 replacement_op =
212 acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
213 if (!replacement_op) {
214 status = AE_NO_MEMORY;
215 }
216 } else
217 if ((op->common.parent->common.aml_opcode ==
218 AML_NAME_OP)
219 && (walk_state->pass_number <=
220 ACPI_IMODE_LOAD_PASS2)) {
221 if ((op->common.aml_opcode == AML_BUFFER_OP)
222 || (op->common.aml_opcode == AML_PACKAGE_OP)
223 || (op->common.aml_opcode ==
224 AML_VAR_PACKAGE_OP)) {
225 replacement_op =
226 acpi_ps_alloc_op(op->common.
227 aml_opcode);
228 if (!replacement_op) {
229 status = AE_NO_MEMORY;
230 } else {
231 replacement_op->named.data =
232 op->named.data;
233 replacement_op->named.length =
234 op->named.length;
235 }
236 }
237 }
238 break;
239
240 default:
241
242 replacement_op =
243 acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
244 if (!replacement_op) {
245 status = AE_NO_MEMORY;
246 }
247 }
248
249
250
251 if (prev == op) {
252
253
254
255 if (replacement_op) {
256 replacement_op->common.parent =
257 op->common.parent;
258 replacement_op->common.value.arg = NULL;
259 replacement_op->common.node = op->common.node;
260 op->common.parent->common.value.arg =
261 replacement_op;
262 replacement_op->common.next = op->common.next;
263 } else {
264 op->common.parent->common.value.arg =
265 op->common.next;
266 }
267 }
268
269
270
271 else
272 while (prev) {
273
274
275
276 next = prev->common.next;
277 if (next == op) {
278 if (replacement_op) {
279 replacement_op->common.parent =
280 op->common.parent;
281 replacement_op->common.value.
282 arg = NULL;
283 replacement_op->common.node =
284 op->common.node;
285 prev->common.next =
286 replacement_op;
287 replacement_op->common.next =
288 op->common.next;
289 next = NULL;
290 } else {
291 prev->common.next =
292 op->common.next;
293 next = NULL;
294 }
295 }
296 prev = next;
297 }
298 }
299
300 cleanup:
301
302
303
304 acpi_ps_delete_parse_tree(op);
305 return_ACPI_STATUS(status);
306}
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323acpi_status
324acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
325 union acpi_parse_object *op,
326 acpi_status callback_status)
327{
328 struct acpi_parse_state *parser_state = &walk_state->parser_state;
329 acpi_status status = AE_CTRL_PENDING;
330
331 ACPI_FUNCTION_TRACE_PTR(ps_next_parse_state, op);
332
333 switch (callback_status) {
334 case AE_CTRL_TERMINATE:
335
336
337
338
339 parser_state->aml = parser_state->aml_end;
340 status = AE_CTRL_TERMINATE;
341 break;
342
343 case AE_CTRL_BREAK:
344
345 parser_state->aml = walk_state->aml_last_while;
346 walk_state->control_state->common.value = FALSE;
347 status = AE_CTRL_BREAK;
348 break;
349
350 case AE_CTRL_CONTINUE:
351
352 parser_state->aml = walk_state->aml_last_while;
353 status = AE_CTRL_CONTINUE;
354 break;
355
356 case AE_CTRL_PENDING:
357
358 parser_state->aml = walk_state->aml_last_while;
359 break;
360
361#if 0
362 case AE_CTRL_SKIP:
363
364 parser_state->aml = parser_state->scope->parse_scope.pkg_end;
365 status = AE_OK;
366 break;
367#endif
368
369 case AE_CTRL_TRUE:
370
371
372
373
374 parser_state->aml = acpi_ps_get_next_package_end(parser_state);
375 status = AE_CTRL_PENDING;
376 break;
377
378 case AE_CTRL_FALSE:
379
380
381
382
383
384
385
386 parser_state->aml = parser_state->scope->parse_scope.pkg_end;
387
388
389
390 walk_state->control_state->common.value = FALSE;
391 status = AE_CTRL_END;
392 break;
393
394 case AE_CTRL_TRANSFER:
395
396
397
398 status = AE_CTRL_TRANSFER;
399 walk_state->prev_op = op;
400 walk_state->method_call_op = op;
401 walk_state->method_call_node =
402 (op->common.value.arg)->common.node;
403
404
405
406 walk_state->return_used =
407 acpi_ds_is_result_used(op, walk_state);
408 break;
409
410 default:
411
412 status = callback_status;
413 if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) {
414 status = AE_OK;
415 }
416 break;
417 }
418
419 return_ACPI_STATUS(status);
420}
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
436{
437 acpi_status status;
438 struct acpi_thread_state *thread;
439 struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list;
440 struct acpi_walk_state *previous_walk_state;
441
442 ACPI_FUNCTION_TRACE(ps_parse_aml);
443
444 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
445 "Entered with WalkState=%p Aml=%p size=%X\n",
446 walk_state, walk_state->parser_state.aml,
447 walk_state->parser_state.aml_size));
448
449 if (!walk_state->parser_state.aml) {
450 return_ACPI_STATUS(AE_NULL_OBJECT);
451 }
452
453
454
455 thread = acpi_ut_create_thread_state();
456 if (!thread) {
457 if (walk_state->method_desc) {
458
459
460
461 acpi_ds_terminate_control_method(walk_state->
462 method_desc,
463 walk_state);
464 }
465
466 acpi_ds_delete_walk_state(walk_state);
467 return_ACPI_STATUS(AE_NO_MEMORY);
468 }
469
470 walk_state->thread = thread;
471
472
473
474
475
476 if (walk_state->method_desc) {
477 walk_state->thread->current_sync_level =
478 walk_state->method_desc->method.sync_level;
479 }
480
481 acpi_ds_push_walk_state(walk_state, thread);
482
483
484
485
486
487 acpi_gbl_current_walk_list = thread;
488
489
490
491
492
493 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "State=%p\n", walk_state));
494
495 status = AE_OK;
496 while (walk_state) {
497 if (ACPI_SUCCESS(status)) {
498
499
500
501
502 status = acpi_ps_parse_loop(walk_state);
503 }
504
505 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
506 "Completed one call to walk loop, %s State=%p\n",
507 acpi_format_exception(status), walk_state));
508
509 if (status == AE_CTRL_TRANSFER) {
510
511
512
513
514 status =
515 acpi_ds_call_control_method(thread, walk_state,
516 NULL);
517 if (ACPI_FAILURE(status)) {
518 status =
519 acpi_ds_method_error(status, walk_state);
520 }
521
522
523
524
525
526 walk_state = acpi_ds_get_current_walk_state(thread);
527 continue;
528 } else if (status == AE_CTRL_TERMINATE) {
529 status = AE_OK;
530 } else if ((status != AE_OK) && (walk_state->method_desc)) {
531
532
533
534 ACPI_ERROR_METHOD("Method parse/execution failed",
535 walk_state->method_node, NULL,
536 status);
537
538
539
540 if ((status == AE_ALREADY_EXISTS) &&
541 (!(walk_state->method_desc->method.
542 info_flags & ACPI_METHOD_SERIALIZED))) {
543
544
545
546
547
548
549 walk_state->method_desc->method.info_flags |=
550 ACPI_METHOD_SERIALIZED_PENDING;
551 }
552 }
553
554
555
556 walk_state = acpi_ds_pop_walk_state(thread);
557
558
559
560 acpi_ds_scope_stack_clear(walk_state);
561
562
563
564
565
566
567 if (((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
568 ACPI_PARSE_EXECUTE) || (ACPI_FAILURE(status))) {
569 acpi_ds_terminate_control_method(walk_state->
570 method_desc,
571 walk_state);
572 }
573
574
575
576 acpi_ps_cleanup_scope(&walk_state->parser_state);
577 previous_walk_state = walk_state;
578
579 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
580 "ReturnValue=%p, ImplicitValue=%p State=%p\n",
581 walk_state->return_desc,
582 walk_state->implicit_return_obj, walk_state));
583
584
585
586 walk_state = acpi_ds_get_current_walk_state(thread);
587 if (walk_state) {
588 if (ACPI_SUCCESS(status)) {
589
590
591
592
593
594 if (!previous_walk_state->return_desc) {
595
596
597
598
599 if (acpi_gbl_enable_interpreter_slack &&
600 !previous_walk_state->
601 implicit_return_obj) {
602 previous_walk_state->
603 implicit_return_obj =
604 acpi_ut_create_integer_object
605 ((u64) 0);
606 if (!previous_walk_state->
607 implicit_return_obj) {
608 return_ACPI_STATUS
609 (AE_NO_MEMORY);
610 }
611 }
612
613
614
615 status =
616 acpi_ds_restart_control_method
617 (walk_state,
618 previous_walk_state->
619 implicit_return_obj);
620 } else {
621
622
623
624
625 acpi_ds_clear_implicit_return
626 (previous_walk_state);
627
628 status =
629 acpi_ds_restart_control_method
630 (walk_state,
631 previous_walk_state->return_desc);
632 }
633 if (ACPI_SUCCESS(status)) {
634 walk_state->walk_type |=
635 ACPI_WALK_METHOD_RESTART;
636 }
637 } else {
638
639
640 acpi_ut_remove_reference(previous_walk_state->
641 return_desc);
642 acpi_ds_clear_implicit_return
643 (previous_walk_state);
644 }
645 }
646
647
648
649
650
651 else if (previous_walk_state->caller_return_desc) {
652 if (previous_walk_state->implicit_return_obj) {
653 *(previous_walk_state->caller_return_desc) =
654 previous_walk_state->implicit_return_obj;
655 } else {
656
657
658 *(previous_walk_state->caller_return_desc) =
659 previous_walk_state->return_desc;
660 }
661 } else {
662 if (previous_walk_state->return_desc) {
663
664
665
666 acpi_ut_remove_reference(previous_walk_state->
667 return_desc);
668 }
669 if (previous_walk_state->implicit_return_obj) {
670
671
672
673 acpi_ut_remove_reference(previous_walk_state->
674 implicit_return_obj);
675 }
676 }
677
678 acpi_ds_delete_walk_state(previous_walk_state);
679 }
680
681
682
683 acpi_ex_release_all_mutexes(thread);
684 acpi_ut_delete_generic_state(ACPI_CAST_PTR
685 (union acpi_generic_state, thread));
686 acpi_gbl_current_walk_list = prev_walk_list;
687 return_ACPI_STATUS(status);
688}
689