aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/parser/psparse.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/parser/psparse.c')
-rw-r--r--drivers/acpi/parser/psparse.c723
1 files changed, 30 insertions, 693 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
index bbfdc1a58c27..16b84a3d0436 100644
--- a/drivers/acpi/parser/psparse.c
+++ b/drivers/acpi/parser/psparse.c
@@ -62,26 +62,6 @@
62 ACPI_MODULE_NAME ("psparse") 62 ACPI_MODULE_NAME ("psparse")
63 63
64 64
65static u32 acpi_gbl_depth = 0;
66
67/* Local prototypes */
68
69static void
70acpi_ps_complete_this_op (
71 struct acpi_walk_state *walk_state,
72 union acpi_parse_object *op);
73
74static acpi_status
75acpi_ps_next_parse_state (
76 struct acpi_walk_state *walk_state,
77 union acpi_parse_object *op,
78 acpi_status callback_status);
79
80static acpi_status
81acpi_ps_parse_loop (
82 struct acpi_walk_state *walk_state);
83
84
85/******************************************************************************* 65/*******************************************************************************
86 * 66 *
87 * FUNCTION: acpi_ps_get_opcode_size 67 * FUNCTION: acpi_ps_get_opcode_size
@@ -134,8 +114,8 @@ acpi_ps_peek_opcode (
134 aml = parser_state->aml; 114 aml = parser_state->aml;
135 opcode = (u16) ACPI_GET8 (aml); 115 opcode = (u16) ACPI_GET8 (aml);
136 116
137 if (opcode == AML_EXTOP) { 117 if (opcode == AML_EXTENDED_OP_PREFIX) {
138 /* Extended opcode */ 118 /* Extended opcode, get the second opcode byte */
139 119
140 aml++; 120 aml++;
141 opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml)); 121 opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml));
@@ -152,13 +132,13 @@ acpi_ps_peek_opcode (
152 * PARAMETERS: walk_state - Current State 132 * PARAMETERS: walk_state - Current State
153 * Op - Op to complete 133 * Op - Op to complete
154 * 134 *
155 * RETURN: None. 135 * RETURN: Status
156 * 136 *
157 * DESCRIPTION: Perform any cleanup at the completion of an Op. 137 * DESCRIPTION: Perform any cleanup at the completion of an Op.
158 * 138 *
159 ******************************************************************************/ 139 ******************************************************************************/
160 140
161static void 141acpi_status
162acpi_ps_complete_this_op ( 142acpi_ps_complete_this_op (
163 struct acpi_walk_state *walk_state, 143 struct acpi_walk_state *walk_state,
164 union acpi_parse_object *op) 144 union acpi_parse_object *op)
@@ -175,19 +155,26 @@ acpi_ps_complete_this_op (
175 /* Check for null Op, can happen if AML code is corrupt */ 155 /* Check for null Op, can happen if AML code is corrupt */
176 156
177 if (!op) { 157 if (!op) {
178 return_VOID; 158 return_ACPI_STATUS (AE_OK); /* OK for now */
179 } 159 }
180 160
181 /* Delete this op and the subtree below it if asked to */ 161 /* Delete this op and the subtree below it if asked to */
182 162
183 if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) || 163 if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) ||
184 (walk_state->op_info->class == AML_CLASS_ARGUMENT)) { 164 (walk_state->op_info->class == AML_CLASS_ARGUMENT)) {
185 return_VOID; 165 return_ACPI_STATUS (AE_OK);
186 } 166 }
187 167
188 /* Make sure that we only delete this subtree */ 168 /* Make sure that we only delete this subtree */
189 169
190 if (op->common.parent) { 170 if (op->common.parent) {
171 prev = op->common.parent->common.value.arg;
172 if (!prev) {
173 /* Nothing more to do */
174
175 goto cleanup;
176 }
177
191 /* 178 /*
192 * Check if we need to replace the operator and its subtree 179 * Check if we need to replace the operator and its subtree
193 * with a return value op (placeholder op) 180 * with a return value op (placeholder op)
@@ -206,7 +193,7 @@ acpi_ps_complete_this_op (
206 */ 193 */
207 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); 194 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
208 if (!replacement_op) { 195 if (!replacement_op) {
209 goto cleanup; 196 goto allocate_error;
210 } 197 }
211 break; 198 break;
212 199
@@ -223,18 +210,17 @@ acpi_ps_complete_this_op (
223 (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { 210 (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
224 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); 211 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
225 if (!replacement_op) { 212 if (!replacement_op) {
226 goto cleanup; 213 goto allocate_error;
227 } 214 }
228 } 215 }
229 216 else if ((op->common.parent->common.aml_opcode == AML_NAME_OP) &&
230 if ((op->common.parent->common.aml_opcode == AML_NAME_OP) && 217 (walk_state->pass_number <= ACPI_IMODE_LOAD_PASS2)) {
231 (walk_state->descending_callback != acpi_ds_exec_begin_op)) {
232 if ((op->common.aml_opcode == AML_BUFFER_OP) || 218 if ((op->common.aml_opcode == AML_BUFFER_OP) ||
233 (op->common.aml_opcode == AML_PACKAGE_OP) || 219 (op->common.aml_opcode == AML_PACKAGE_OP) ||
234 (op->common.aml_opcode == AML_VAR_PACKAGE_OP)) { 220 (op->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
235 replacement_op = acpi_ps_alloc_op (op->common.aml_opcode); 221 replacement_op = acpi_ps_alloc_op (op->common.aml_opcode);
236 if (!replacement_op) { 222 if (!replacement_op) {
237 goto cleanup; 223 goto allocate_error;
238 } 224 }
239 225
240 replacement_op->named.data = op->named.data; 226 replacement_op->named.data = op->named.data;
@@ -244,15 +230,15 @@ acpi_ps_complete_this_op (
244 break; 230 break;
245 231
246 default: 232 default:
233
247 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); 234 replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
248 if (!replacement_op) { 235 if (!replacement_op) {
249 goto cleanup; 236 goto allocate_error;
250 } 237 }
251 } 238 }
252 239
253 /* We must unlink this op from the parent tree */ 240 /* We must unlink this op from the parent tree */
254 241
255 prev = op->common.parent->common.value.arg;
256 if (prev == op) { 242 if (prev == op) {
257 /* This op is the first in the list */ 243 /* This op is the first in the list */
258 244
@@ -298,7 +284,15 @@ cleanup:
298 /* Now we can actually delete the subtree rooted at Op */ 284 /* Now we can actually delete the subtree rooted at Op */
299 285
300 acpi_ps_delete_parse_tree (op); 286 acpi_ps_delete_parse_tree (op);
301 return_VOID; 287 return_ACPI_STATUS (AE_OK);
288
289
290allocate_error:
291
292 /* Always delete the subtree, even on error */
293
294 acpi_ps_delete_parse_tree (op);
295 return_ACPI_STATUS (AE_NO_MEMORY);
302} 296}
303 297
304 298
@@ -317,7 +311,7 @@ cleanup:
317 * 311 *
318 ******************************************************************************/ 312 ******************************************************************************/
319 313
320static acpi_status 314acpi_status
321acpi_ps_next_parse_state ( 315acpi_ps_next_parse_state (
322 struct acpi_walk_state *walk_state, 316 struct acpi_walk_state *walk_state,
323 union acpi_parse_object *op, 317 union acpi_parse_object *op,
@@ -427,663 +421,6 @@ acpi_ps_next_parse_state (
427 421
428/******************************************************************************* 422/*******************************************************************************
429 * 423 *
430 * FUNCTION: acpi_ps_parse_loop
431 *
432 * PARAMETERS: walk_state - Current state
433 *
434 * RETURN: Status
435 *
436 * DESCRIPTION: Parse AML (pointed to by the current parser state) and return
437 * a tree of ops.
438 *
439 ******************************************************************************/
440
441static acpi_status
442acpi_ps_parse_loop (
443 struct acpi_walk_state *walk_state)
444{
445 acpi_status status = AE_OK;
446 union acpi_parse_object *op = NULL; /* current op */
447 union acpi_parse_object *arg = NULL;
448 union acpi_parse_object *pre_op = NULL;
449 struct acpi_parse_state *parser_state;
450 u8 *aml_op_start = NULL;
451
452
453 ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state);
454
455 if (walk_state->descending_callback == NULL) {
456 return_ACPI_STATUS (AE_BAD_PARAMETER);
457 }
458
459 parser_state = &walk_state->parser_state;
460 walk_state->arg_types = 0;
461
462#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
463
464 if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) {
465 /* We are restarting a preempted control method */
466
467 if (acpi_ps_has_completed_scope (parser_state)) {
468 /*
469 * We must check if a predicate to an IF or WHILE statement
470 * was just completed
471 */
472 if ((parser_state->scope->parse_scope.op) &&
473 ((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) ||
474 (parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) &&
475 (walk_state->control_state) &&
476 (walk_state->control_state->common.state ==
477 ACPI_CONTROL_PREDICATE_EXECUTING)) {
478 /*
479 * A predicate was just completed, get the value of the
480 * predicate and branch based on that value
481 */
482 walk_state->op = NULL;
483 status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE));
484 if (ACPI_FAILURE (status) &&
485 ((status & AE_CODE_MASK) != AE_CODE_CONTROL)) {
486 if (status == AE_AML_NO_RETURN_VALUE) {
487 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
488 "Invoked method did not return a value, %s\n",
489 acpi_format_exception (status)));
490
491 }
492 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
493 "get_predicate Failed, %s\n",
494 acpi_format_exception (status)));
495 return_ACPI_STATUS (status);
496 }
497
498 status = acpi_ps_next_parse_state (walk_state, op, status);
499 }
500
501 acpi_ps_pop_scope (parser_state, &op,
502 &walk_state->arg_types, &walk_state->arg_count);
503 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
504 }
505 else if (walk_state->prev_op) {
506 /* We were in the middle of an op */
507
508 op = walk_state->prev_op;
509 walk_state->arg_types = walk_state->prev_arg_types;
510 }
511 }
512#endif
513
514 /* Iterative parsing loop, while there is more AML to process: */
515
516 while ((parser_state->aml < parser_state->aml_end) || (op)) {
517 aml_op_start = parser_state->aml;
518 if (!op) {
519 /* Get the next opcode from the AML stream */
520
521 walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
522 parser_state->aml_start);
523 walk_state->opcode = acpi_ps_peek_opcode (parser_state);
524
525 /*
526 * First cut to determine what we have found:
527 * 1) A valid AML opcode
528 * 2) A name string
529 * 3) An unknown/invalid opcode
530 */
531 walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
532 switch (walk_state->op_info->class) {
533 case AML_CLASS_ASCII:
534 case AML_CLASS_PREFIX:
535 /*
536 * Starts with a valid prefix or ASCII char, this is a name
537 * string. Convert the bare name string to a namepath.
538 */
539 walk_state->opcode = AML_INT_NAMEPATH_OP;
540 walk_state->arg_types = ARGP_NAMESTRING;
541 break;
542
543 case AML_CLASS_UNKNOWN:
544
545 /* The opcode is unrecognized. Just skip unknown opcodes */
546
547 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
548 "Found unknown opcode %X at AML address %p offset %X, ignoring\n",
549 walk_state->opcode, parser_state->aml, walk_state->aml_offset));
550
551 ACPI_DUMP_BUFFER (parser_state->aml, 128);
552
553 /* Assume one-byte bad opcode */
554
555 parser_state->aml++;
556 continue;
557
558 default:
559
560 /* Found opcode info, this is a normal opcode */
561
562 parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode);
563 walk_state->arg_types = walk_state->op_info->parse_args;
564 break;
565 }
566
567 /* Create Op structure and append to parent's argument list */
568
569 if (walk_state->op_info->flags & AML_NAMED) {
570 /* Allocate a new pre_op if necessary */
571
572 if (!pre_op) {
573 pre_op = acpi_ps_alloc_op (walk_state->opcode);
574 if (!pre_op) {
575 status = AE_NO_MEMORY;
576 goto close_this_op;
577 }
578 }
579
580 pre_op->common.value.arg = NULL;
581 pre_op->common.aml_opcode = walk_state->opcode;
582
583 /*
584 * Get and append arguments until we find the node that contains
585 * the name (the type ARGP_NAME).
586 */
587 while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
588 (GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) {
589 status = acpi_ps_get_next_arg (walk_state, parser_state,
590 GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
591 if (ACPI_FAILURE (status)) {
592 goto close_this_op;
593 }
594
595 acpi_ps_append_arg (pre_op, arg);
596 INCREMENT_ARG_LIST (walk_state->arg_types);
597 }
598
599 /*
600 * Make sure that we found a NAME and didn't run out of
601 * arguments
602 */
603 if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) {
604 status = AE_AML_NO_OPERAND;
605 goto close_this_op;
606 }
607
608 /* We know that this arg is a name, move to next arg */
609
610 INCREMENT_ARG_LIST (walk_state->arg_types);
611
612 /*
613 * Find the object. This will either insert the object into
614 * the namespace or simply look it up
615 */
616 walk_state->op = NULL;
617
618 status = walk_state->descending_callback (walk_state, &op);
619 if (ACPI_FAILURE (status)) {
620 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
621 "During name lookup/catalog, %s\n",
622 acpi_format_exception (status)));
623 goto close_this_op;
624 }
625
626 if (!op) {
627 continue;
628 }
629
630 status = acpi_ps_next_parse_state (walk_state, op, status);
631 if (status == AE_CTRL_PENDING) {
632 status = AE_OK;
633 goto close_this_op;
634 }
635
636 if (ACPI_FAILURE (status)) {
637 goto close_this_op;
638 }
639
640 acpi_ps_append_arg (op, pre_op->common.value.arg);
641 acpi_gbl_depth++;
642
643 if (op->common.aml_opcode == AML_REGION_OP) {
644 /*
645 * Defer final parsing of an operation_region body,
646 * because we don't have enough info in the first pass
647 * to parse it correctly (i.e., there may be method
648 * calls within the term_arg elements of the body.)
649 *
650 * However, we must continue parsing because
651 * the opregion is not a standalone package --
652 * we don't know where the end is at this point.
653 *
654 * (Length is unknown until parse of the body complete)
655 */
656 op->named.data = aml_op_start;
657 op->named.length = 0;
658 }
659 }
660 else {
661 /* Not a named opcode, just allocate Op and append to parent */
662
663 walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
664 op = acpi_ps_alloc_op (walk_state->opcode);
665 if (!op) {
666 status = AE_NO_MEMORY;
667 goto close_this_op;
668 }
669
670 if (walk_state->op_info->flags & AML_CREATE) {
671 /*
672 * Backup to beginning of create_xXXfield declaration
673 * body_length is unknown until we parse the body
674 */
675 op->named.data = aml_op_start;
676 op->named.length = 0;
677 }
678
679 acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op);
680
681 if ((walk_state->descending_callback != NULL)) {
682 /*
683 * Find the object. This will either insert the object into
684 * the namespace or simply look it up
685 */
686 walk_state->op = op;
687
688 status = walk_state->descending_callback (walk_state, &op);
689 status = acpi_ps_next_parse_state (walk_state, op, status);
690 if (status == AE_CTRL_PENDING) {
691 status = AE_OK;
692 goto close_this_op;
693 }
694
695 if (ACPI_FAILURE (status)) {
696 goto close_this_op;
697 }
698 }
699 }
700
701 op->common.aml_offset = walk_state->aml_offset;
702
703 if (walk_state->op_info) {
704 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
705 "Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n",
706 (u32) op->common.aml_opcode, walk_state->op_info->name,
707 op, parser_state->aml, op->common.aml_offset));
708 }
709 }
710
711
712 /*
713 * Start arg_count at zero because we don't know if there are
714 * any args yet
715 */
716 walk_state->arg_count = 0;
717
718 /* Are there any arguments that must be processed? */
719
720 if (walk_state->arg_types) {
721 /* Get arguments */
722
723 switch (op->common.aml_opcode) {
724 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
725 case AML_WORD_OP: /* AML_WORDDATA_ARG */
726 case AML_DWORD_OP: /* AML_DWORDATA_ARG */
727 case AML_QWORD_OP: /* AML_QWORDATA_ARG */
728 case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
729
730 /* Fill in constant or string argument directly */
731
732 acpi_ps_get_next_simple_arg (parser_state,
733 GET_CURRENT_ARG_TYPE (walk_state->arg_types), op);
734 break;
735
736 case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
737
738 status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1);
739 if (ACPI_FAILURE (status)) {
740 goto close_this_op;
741 }
742
743 walk_state->arg_types = 0;
744 break;
745
746 default:
747
748 /*
749 * Op is not a constant or string, append each argument
750 * to the Op
751 */
752 while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
753 !walk_state->arg_count) {
754 walk_state->aml_offset = (u32)
755 ACPI_PTR_DIFF (parser_state->aml, parser_state->aml_start);
756
757 status = acpi_ps_get_next_arg (walk_state, parser_state,
758 GET_CURRENT_ARG_TYPE (walk_state->arg_types),
759 &arg);
760 if (ACPI_FAILURE (status)) {
761 goto close_this_op;
762 }
763
764 if (arg) {
765 arg->common.aml_offset = walk_state->aml_offset;
766 acpi_ps_append_arg (op, arg);
767 }
768 INCREMENT_ARG_LIST (walk_state->arg_types);
769 }
770
771 /* Special processing for certain opcodes */
772
773 switch (op->common.aml_opcode) {
774 case AML_METHOD_OP:
775
776 /*
777 * Skip parsing of control method
778 * because we don't have enough info in the first pass
779 * to parse it correctly.
780 *
781 * Save the length and address of the body
782 */
783 op->named.data = parser_state->aml;
784 op->named.length = (u32) (parser_state->pkg_end -
785 parser_state->aml);
786
787 /* Skip body of method */
788
789 parser_state->aml = parser_state->pkg_end;
790 walk_state->arg_count = 0;
791 break;
792
793 case AML_BUFFER_OP:
794 case AML_PACKAGE_OP:
795 case AML_VAR_PACKAGE_OP:
796
797 if ((op->common.parent) &&
798 (op->common.parent->common.aml_opcode == AML_NAME_OP) &&
799 (walk_state->descending_callback != acpi_ds_exec_begin_op)) {
800 /*
801 * Skip parsing of Buffers and Packages
802 * because we don't have enough info in the first pass
803 * to parse them correctly.
804 */
805 op->named.data = aml_op_start;
806 op->named.length = (u32) (parser_state->pkg_end -
807 aml_op_start);
808
809 /* Skip body */
810
811 parser_state->aml = parser_state->pkg_end;
812 walk_state->arg_count = 0;
813 }
814 break;
815
816 case AML_WHILE_OP:
817
818 if (walk_state->control_state) {
819 walk_state->control_state->control.package_end =
820 parser_state->pkg_end;
821 }
822 break;
823
824 default:
825
826 /* No action for all other opcodes */
827 break;
828 }
829 break;
830 }
831 }
832
833 /* Check for arguments that need to be processed */
834
835 if (walk_state->arg_count) {
836 /*
837 * There are arguments (complex ones), push Op and
838 * prepare for argument
839 */
840 status = acpi_ps_push_scope (parser_state, op,
841 walk_state->arg_types, walk_state->arg_count);
842 if (ACPI_FAILURE (status)) {
843 goto close_this_op;
844 }
845 op = NULL;
846 continue;
847 }
848
849 /*
850 * All arguments have been processed -- Op is complete,
851 * prepare for next
852 */
853 walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
854 if (walk_state->op_info->flags & AML_NAMED) {
855 if (acpi_gbl_depth) {
856 acpi_gbl_depth--;
857 }
858
859 if (op->common.aml_opcode == AML_REGION_OP) {
860 /*
861 * Skip parsing of control method or opregion body,
862 * because we don't have enough info in the first pass
863 * to parse them correctly.
864 *
865 * Completed parsing an op_region declaration, we now
866 * know the length.
867 */
868 op->named.length = (u32) (parser_state->aml - op->named.data);
869 }
870 }
871
872 if (walk_state->op_info->flags & AML_CREATE) {
873 /*
874 * Backup to beginning of create_xXXfield declaration (1 for
875 * Opcode)
876 *
877 * body_length is unknown until we parse the body
878 */
879 op->named.length = (u32) (parser_state->aml - op->named.data);
880 }
881
882 /* This op complete, notify the dispatcher */
883
884 if (walk_state->ascending_callback != NULL) {
885 walk_state->op = op;
886 walk_state->opcode = op->common.aml_opcode;
887
888 status = walk_state->ascending_callback (walk_state);
889 status = acpi_ps_next_parse_state (walk_state, op, status);
890 if (status == AE_CTRL_PENDING) {
891 status = AE_OK;
892 goto close_this_op;
893 }
894 }
895
896
897close_this_op:
898 /*
899 * Finished one argument of the containing scope
900 */
901 parser_state->scope->parse_scope.arg_count--;
902
903 /* Close this Op (will result in parse subtree deletion) */
904
905 acpi_ps_complete_this_op (walk_state, op);
906 op = NULL;
907 if (pre_op) {
908 acpi_ps_free_op (pre_op);
909 pre_op = NULL;
910 }
911
912 switch (status) {
913 case AE_OK:
914 break;
915
916
917 case AE_CTRL_TRANSFER:
918
919 /* We are about to transfer to a called method. */
920
921 walk_state->prev_op = op;
922 walk_state->prev_arg_types = walk_state->arg_types;
923 return_ACPI_STATUS (status);
924
925
926 case AE_CTRL_END:
927
928 acpi_ps_pop_scope (parser_state, &op,
929 &walk_state->arg_types, &walk_state->arg_count);
930
931 if (op) {
932 walk_state->op = op;
933 walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
934 walk_state->opcode = op->common.aml_opcode;
935
936 status = walk_state->ascending_callback (walk_state);
937 status = acpi_ps_next_parse_state (walk_state, op, status);
938
939 acpi_ps_complete_this_op (walk_state, op);
940 op = NULL;
941 }
942 status = AE_OK;
943 break;
944
945
946 case AE_CTRL_BREAK:
947 case AE_CTRL_CONTINUE:
948
949 /* Pop off scopes until we find the While */
950
951 while (!op || (op->common.aml_opcode != AML_WHILE_OP)) {
952 acpi_ps_pop_scope (parser_state, &op,
953 &walk_state->arg_types, &walk_state->arg_count);
954 }
955
956 /* Close this iteration of the While loop */
957
958 walk_state->op = op;
959 walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
960 walk_state->opcode = op->common.aml_opcode;
961
962 status = walk_state->ascending_callback (walk_state);
963 status = acpi_ps_next_parse_state (walk_state, op, status);
964
965 acpi_ps_complete_this_op (walk_state, op);
966 op = NULL;
967
968 status = AE_OK;
969 break;
970
971
972 case AE_CTRL_TERMINATE:
973
974 status = AE_OK;
975
976 /* Clean up */
977 do {
978 if (op) {
979 acpi_ps_complete_this_op (walk_state, op);
980 }
981 acpi_ps_pop_scope (parser_state, &op,
982 &walk_state->arg_types, &walk_state->arg_count);
983
984 } while (op);
985
986 return_ACPI_STATUS (status);
987
988
989 default: /* All other non-AE_OK status */
990
991 do {
992 if (op) {
993 acpi_ps_complete_this_op (walk_state, op);
994 }
995 acpi_ps_pop_scope (parser_state, &op,
996 &walk_state->arg_types, &walk_state->arg_count);
997
998 } while (op);
999
1000
1001 /*
1002 * TBD: Cleanup parse ops on error
1003 */
1004#if 0
1005 if (op == NULL) {
1006 acpi_ps_pop_scope (parser_state, &op,
1007 &walk_state->arg_types, &walk_state->arg_count);
1008 }
1009#endif
1010 walk_state->prev_op = op;
1011 walk_state->prev_arg_types = walk_state->arg_types;
1012 return_ACPI_STATUS (status);
1013 }
1014
1015 /* This scope complete? */
1016
1017 if (acpi_ps_has_completed_scope (parser_state)) {
1018 acpi_ps_pop_scope (parser_state, &op,
1019 &walk_state->arg_types, &walk_state->arg_count);
1020 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
1021 }
1022 else {
1023 op = NULL;
1024 }
1025
1026 } /* while parser_state->Aml */
1027
1028
1029 /*
1030 * Complete the last Op (if not completed), and clear the scope stack.
1031 * It is easily possible to end an AML "package" with an unbounded number
1032 * of open scopes (such as when several ASL blocks are closed with
1033 * sequential closing braces). We want to terminate each one cleanly.
1034 */
1035 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op));
1036 do {
1037 if (op) {
1038 if (walk_state->ascending_callback != NULL) {
1039 walk_state->op = op;
1040 walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
1041 walk_state->opcode = op->common.aml_opcode;
1042
1043 status = walk_state->ascending_callback (walk_state);
1044 status = acpi_ps_next_parse_state (walk_state, op, status);
1045 if (status == AE_CTRL_PENDING) {
1046 status = AE_OK;
1047 goto close_this_op;
1048 }
1049
1050 if (status == AE_CTRL_TERMINATE) {
1051 status = AE_OK;
1052
1053 /* Clean up */
1054 do {
1055 if (op) {
1056 acpi_ps_complete_this_op (walk_state, op);
1057 }
1058
1059 acpi_ps_pop_scope (parser_state, &op,
1060 &walk_state->arg_types, &walk_state->arg_count);
1061
1062 } while (op);
1063
1064 return_ACPI_STATUS (status);
1065 }
1066
1067 else if (ACPI_FAILURE (status)) {
1068 acpi_ps_complete_this_op (walk_state, op);
1069 return_ACPI_STATUS (status);
1070 }
1071 }
1072
1073 acpi_ps_complete_this_op (walk_state, op);
1074 }
1075
1076 acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types,
1077 &walk_state->arg_count);
1078
1079 } while (op);
1080
1081 return_ACPI_STATUS (status);
1082}
1083
1084
1085/*******************************************************************************
1086 *
1087 * FUNCTION: acpi_ps_parse_aml 424 * FUNCTION: acpi_ps_parse_aml
1088 * 425 *
1089 * PARAMETERS: walk_state - Current state 426 * PARAMETERS: walk_state - Current state
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 19:20:38 -0500