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44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acparser.h"
47#include "amlcode.h"
48#include "acnamesp.h"
49#include "acdispat.h"
50
51#define _COMPONENT ACPI_PARSER
52ACPI_MODULE_NAME("psargs")
53
54
55static u32
56acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state);
57
58static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
59 *parser_state);
60
61
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64
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73
74
75static u32
76acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state)
77{
78 u8 *aml = parser_state->aml;
79 u32 package_length = 0;
80 u32 byte_count;
81 u8 byte_zero_mask = 0x3F;
82
83 ACPI_FUNCTION_TRACE(ps_get_next_package_length);
84
85
86
87
88
89 byte_count = (aml[0] >> 6);
90 parser_state->aml += ((acpi_size) byte_count + 1);
91
92
93
94 while (byte_count) {
95
96
97
98
99
100
101
102 package_length |= (aml[byte_count] << ((byte_count << 3) - 4));
103
104 byte_zero_mask = 0x0F;
105 byte_count--;
106 }
107
108
109
110 package_length |= (aml[0] & byte_zero_mask);
111 return_UINT32(package_length);
112}
113
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123
124
125
126
127u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state)
128{
129 u8 *start = parser_state->aml;
130 u32 package_length;
131
132 ACPI_FUNCTION_TRACE(ps_get_next_package_end);
133
134
135
136 package_length = acpi_ps_get_next_package_length(parser_state);
137
138 return_PTR(start + package_length);
139}
140
141
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153
154
155
156char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state)
157{
158 u8 *start = parser_state->aml;
159 u8 *end = parser_state->aml;
160
161 ACPI_FUNCTION_TRACE(ps_get_next_namestring);
162
163
164
165 while (acpi_ps_is_prefix_char(*end)) {
166 end++;
167 }
168
169
170
171 switch (*end) {
172 case 0:
173
174
175
176 if (end == start) {
177 start = NULL;
178 }
179 end++;
180 break;
181
182 case AML_DUAL_NAME_PREFIX:
183
184
185
186 end += 1 + (2 * ACPI_NAME_SIZE);
187 break;
188
189 case AML_MULTI_NAME_PREFIX_OP:
190
191
192
193 end += 2 + (*(end + 1) * ACPI_NAME_SIZE);
194 break;
195
196 default:
197
198
199
200 end += ACPI_NAME_SIZE;
201 break;
202 }
203
204 parser_state->aml = end;
205 return_PTR((char *)start);
206}
207
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228
229acpi_status
230acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
231 struct acpi_parse_state *parser_state,
232 union acpi_parse_object *arg, u8 possible_method_call)
233{
234 acpi_status status;
235 char *path;
236 union acpi_parse_object *name_op;
237 union acpi_operand_object *method_desc;
238 struct acpi_namespace_node *node;
239 u8 *start = parser_state->aml;
240
241 ACPI_FUNCTION_TRACE(ps_get_next_namepath);
242
243 path = acpi_ps_get_next_namestring(parser_state);
244 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
245
246
247
248 if (!path) {
249 arg->common.value.name = path;
250 return_ACPI_STATUS(AE_OK);
251 }
252
253
254
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258
259
260
261 status = acpi_ns_lookup(walk_state->scope_info, path,
262 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
263 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
264 NULL, &node);
265
266
267
268
269
270 if (ACPI_SUCCESS(status) &&
271 possible_method_call && (node->type == ACPI_TYPE_METHOD)) {
272 if (walk_state->opcode == AML_UNLOAD_OP) {
273
274
275
276
277 walk_state->parser_state.aml = start;
278 walk_state->arg_count = 1;
279 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
280 return_ACPI_STATUS(AE_OK);
281 }
282
283
284
285 method_desc = acpi_ns_get_attached_object(node);
286 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
287 "Control Method - %p Desc %p Path=%p\n", node,
288 method_desc, path));
289
290 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
291 if (!name_op) {
292 return_ACPI_STATUS(AE_NO_MEMORY);
293 }
294
295
296
297 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
298 name_op->common.value.name = path;
299
300
301
302 name_op->common.node = node;
303 acpi_ps_append_arg(arg, name_op);
304
305 if (!method_desc) {
306 ACPI_ERROR((AE_INFO,
307 "Control Method %p has no attached object",
308 node));
309 return_ACPI_STATUS(AE_AML_INTERNAL);
310 }
311
312 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
313 "Control Method - %p Args %X\n",
314 node, method_desc->method.param_count));
315
316
317
318 walk_state->arg_count = method_desc->method.param_count;
319 return_ACPI_STATUS(AE_OK);
320 }
321
322
323
324
325
326 if (status == AE_NOT_FOUND) {
327
328
329
330 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) !=
331 ACPI_PARSE_EXECUTE) {
332 status = AE_OK;
333 }
334
335
336
337 else if (walk_state->op->common.aml_opcode ==
338 AML_COND_REF_OF_OP) {
339 status = AE_OK;
340 }
341
342
343
344
345
346
347 else if ((arg->common.parent) &&
348 ((arg->common.parent->common.aml_opcode ==
349 AML_PACKAGE_OP)
350 || (arg->common.parent->common.aml_opcode ==
351 AML_VAR_PACKAGE_OP))) {
352 status = AE_OK;
353 }
354 }
355
356
357
358 if (ACPI_FAILURE(status)) {
359 ACPI_ERROR_NAMESPACE(path, status);
360
361 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
362 ACPI_PARSE_EXECUTE) {
363
364
365
366 status = acpi_ds_method_error(status, walk_state);
367 }
368 }
369
370
371
372 arg->common.value.name = path;
373 return_ACPI_STATUS(status);
374}
375
376
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388
389
390void
391acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state,
392 u32 arg_type, union acpi_parse_object *arg)
393{
394 u32 length;
395 u16 opcode;
396 u8 *aml = parser_state->aml;
397
398 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type);
399
400 switch (arg_type) {
401 case ARGP_BYTEDATA:
402
403
404
405 opcode = AML_BYTE_OP;
406 arg->common.value.integer = (u64) *aml;
407 length = 1;
408 break;
409
410 case ARGP_WORDDATA:
411
412
413
414 opcode = AML_WORD_OP;
415 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml);
416 length = 2;
417 break;
418
419 case ARGP_DWORDDATA:
420
421
422
423 opcode = AML_DWORD_OP;
424 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml);
425 length = 4;
426 break;
427
428 case ARGP_QWORDDATA:
429
430
431
432 opcode = AML_QWORD_OP;
433 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml);
434 length = 8;
435 break;
436
437 case ARGP_CHARLIST:
438
439
440
441 opcode = AML_STRING_OP;
442 arg->common.value.string = ACPI_CAST_PTR(char, aml);
443
444
445
446 length = 0;
447 while (aml[length]) {
448 length++;
449 }
450 length++;
451 break;
452
453 case ARGP_NAME:
454 case ARGP_NAMESTRING:
455
456 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
457 arg->common.value.name =
458 acpi_ps_get_next_namestring(parser_state);
459 return_VOID;
460
461 default:
462
463 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type));
464 return_VOID;
465 }
466
467 acpi_ps_init_op(arg, opcode);
468 parser_state->aml += length;
469 return_VOID;
470}
471
472
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477
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480
481
482
483
484static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
485 *parser_state)
486{
487 u32 aml_offset = (u32)
488 ACPI_PTR_DIFF(parser_state->aml,
489 parser_state->aml_start);
490 union acpi_parse_object *field;
491 u16 opcode;
492 u32 name;
493
494 ACPI_FUNCTION_TRACE(ps_get_next_field);
495
496
497
498 switch (ACPI_GET8(parser_state->aml)) {
499 default:
500
501 opcode = AML_INT_NAMEDFIELD_OP;
502 break;
503
504 case 0x00:
505
506 opcode = AML_INT_RESERVEDFIELD_OP;
507 parser_state->aml++;
508 break;
509
510 case 0x01:
511
512 opcode = AML_INT_ACCESSFIELD_OP;
513 parser_state->aml++;
514 break;
515 }
516
517
518
519 field = acpi_ps_alloc_op(opcode);
520 if (!field) {
521 return_PTR(NULL);
522 }
523
524 field->common.aml_offset = aml_offset;
525
526
527
528 switch (opcode) {
529 case AML_INT_NAMEDFIELD_OP:
530
531
532
533 ACPI_MOVE_32_TO_32(&name, parser_state->aml);
534 acpi_ps_set_name(field, name);
535 parser_state->aml += ACPI_NAME_SIZE;
536
537
538
539 field->common.value.size =
540 acpi_ps_get_next_package_length(parser_state);
541 break;
542
543 case AML_INT_RESERVEDFIELD_OP:
544
545
546
547 field->common.value.size =
548 acpi_ps_get_next_package_length(parser_state);
549 break;
550
551 case AML_INT_ACCESSFIELD_OP:
552
553
554
555
556
557 field->common.value.integer =
558 (((u32) ACPI_GET8(parser_state->aml) << 8));
559 parser_state->aml++;
560 field->common.value.integer |= ACPI_GET8(parser_state->aml);
561 parser_state->aml++;
562 break;
563
564 default:
565
566
567 break;
568 }
569
570 return_PTR(field);
571}
572
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588
589acpi_status
590acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
591 struct acpi_parse_state *parser_state,
592 u32 arg_type, union acpi_parse_object **return_arg)
593{
594 union acpi_parse_object *arg = NULL;
595 union acpi_parse_object *prev = NULL;
596 union acpi_parse_object *field;
597 u32 subop;
598 acpi_status status = AE_OK;
599
600 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state);
601
602 switch (arg_type) {
603 case ARGP_BYTEDATA:
604 case ARGP_WORDDATA:
605 case ARGP_DWORDDATA:
606 case ARGP_CHARLIST:
607 case ARGP_NAME:
608 case ARGP_NAMESTRING:
609
610
611
612 arg = acpi_ps_alloc_op(AML_BYTE_OP);
613 if (!arg) {
614 return_ACPI_STATUS(AE_NO_MEMORY);
615 }
616 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg);
617 break;
618
619 case ARGP_PKGLENGTH:
620
621
622
623 parser_state->pkg_end =
624 acpi_ps_get_next_package_end(parser_state);
625 break;
626
627 case ARGP_FIELDLIST:
628
629 if (parser_state->aml < parser_state->pkg_end) {
630
631
632
633 while (parser_state->aml < parser_state->pkg_end) {
634 field = acpi_ps_get_next_field(parser_state);
635 if (!field) {
636 return_ACPI_STATUS(AE_NO_MEMORY);
637 }
638
639 if (prev) {
640 prev->common.next = field;
641 } else {
642 arg = field;
643 }
644 prev = field;
645 }
646
647
648
649 parser_state->aml = parser_state->pkg_end;
650 }
651 break;
652
653 case ARGP_BYTELIST:
654
655 if (parser_state->aml < parser_state->pkg_end) {
656
657
658
659 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
660 if (!arg) {
661 return_ACPI_STATUS(AE_NO_MEMORY);
662 }
663
664
665
666 arg->common.value.size = (u32)
667 ACPI_PTR_DIFF(parser_state->pkg_end,
668 parser_state->aml);
669 arg->named.data = parser_state->aml;
670
671
672
673 parser_state->aml = parser_state->pkg_end;
674 }
675 break;
676
677 case ARGP_TARGET:
678 case ARGP_SUPERNAME:
679 case ARGP_SIMPLENAME:
680
681 subop = acpi_ps_peek_opcode(parser_state);
682 if (subop == 0 ||
683 acpi_ps_is_leading_char(subop) ||
684 acpi_ps_is_prefix_char(subop)) {
685
686
687
688 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
689 if (!arg) {
690 return_ACPI_STATUS(AE_NO_MEMORY);
691 }
692
693
694
695 if (walk_state->opcode == AML_UNLOAD_OP) {
696 status =
697 acpi_ps_get_next_namepath(walk_state,
698 parser_state, arg,
699 1);
700
701
702
703
704
705 if (arg->common.aml_opcode ==
706 AML_INT_METHODCALL_OP) {
707 acpi_ps_free_op(arg);
708 arg = NULL;
709 }
710 } else {
711 status =
712 acpi_ps_get_next_namepath(walk_state,
713 parser_state, arg,
714 0);
715 }
716 } else {
717
718
719 walk_state->arg_count = 1;
720 }
721 break;
722
723 case ARGP_DATAOBJ:
724 case ARGP_TERMARG:
725
726
727
728 walk_state->arg_count = 1;
729 break;
730
731 case ARGP_DATAOBJLIST:
732 case ARGP_TERMLIST:
733 case ARGP_OBJLIST:
734
735 if (parser_state->aml < parser_state->pkg_end) {
736
737
738
739 walk_state->arg_count = ACPI_VAR_ARGS;
740 }
741 break;
742
743 default:
744
745 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type));
746 status = AE_AML_OPERAND_TYPE;
747 break;
748 }
749
750 *return_arg = arg;
751 return_ACPI_STATUS(status);
752}
753