1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3 *
4 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
5 *
6 * Copyright (C) 2000 - 2019, Intel Corp.
7 *
8 *****************************************************************************/
9
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acparser.h"
13 #include "amlcode.h"
14 #include "acdispat.h"
15 #include "acinterp.h"
16 #include "acnamesp.h"
17 #include "acevents.h"
18 #ifdef ACPI_EXEC_APP
19 #include "aecommon.h"
20 #endif
21
22 #define _COMPONENT ACPI_DISPATCHER
23 ACPI_MODULE_NAME("dswload2")
24
25 /*******************************************************************************
26 *
27 * FUNCTION: acpi_ds_load2_begin_op
28 *
29 * PARAMETERS: walk_state - Current state of the parse tree walk
30 * out_op - Where to return op if a new one is created
31 *
32 * RETURN: Status
33 *
34 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
35 *
36 ******************************************************************************/
37 acpi_status
38 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
39 union acpi_parse_object **out_op)
40 {
41 union acpi_parse_object *op;
42 struct acpi_namespace_node *node;
43 acpi_status status;
44 acpi_object_type object_type;
45 char *buffer_ptr;
46 u32 flags;
47
48 ACPI_FUNCTION_TRACE(ds_load2_begin_op);
49
50 op = walk_state->op;
51 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
52 walk_state));
53
54 if (op) {
55 if ((walk_state->control_state) &&
56 (walk_state->control_state->common.state ==
57 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
58
59 /* We are executing a while loop outside of a method */
60
61 status = acpi_ds_exec_begin_op(walk_state, out_op);
62 return_ACPI_STATUS(status);
63 }
64
65 /* We only care about Namespace opcodes here */
66
67 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
68 (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
69 (!(walk_state->op_info->flags & AML_NAMED))) {
70 return_ACPI_STATUS(AE_OK);
71 }
72
73 /* Get the name we are going to enter or lookup in the namespace */
74
75 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
76
77 /* For Namepath op, get the path string */
78
79 buffer_ptr = op->common.value.string;
80 if (!buffer_ptr) {
81
82 /* No name, just exit */
83
84 return_ACPI_STATUS(AE_OK);
85 }
86 } else {
87 /* Get name from the op */
88
89 buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
90 }
91 } else {
92 /* Get the namestring from the raw AML */
93
94 buffer_ptr =
95 acpi_ps_get_next_namestring(&walk_state->parser_state);
96 }
97
98 /* Map the opcode into an internal object type */
99
100 object_type = walk_state->op_info->object_type;
101
102 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
103 "State=%p Op=%p Type=%X\n", walk_state, op,
104 object_type));
105
106 switch (walk_state->opcode) {
107 case AML_FIELD_OP:
108 case AML_BANK_FIELD_OP:
109 case AML_INDEX_FIELD_OP:
110
111 node = NULL;
112 status = AE_OK;
113 break;
114
115 case AML_INT_NAMEPATH_OP:
116 /*
117 * The name_path is an object reference to an existing object.
118 * Don't enter the name into the namespace, but look it up
119 * for use later.
120 */
121 status =
122 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
123 object_type, ACPI_IMODE_EXECUTE,
124 ACPI_NS_SEARCH_PARENT, walk_state, &(node));
125 break;
126
127 case AML_SCOPE_OP:
128
129 /* Special case for Scope(\) -> refers to the Root node */
130
131 if (op && (op->named.node == acpi_gbl_root_node)) {
132 node = op->named.node;
133
134 status =
135 acpi_ds_scope_stack_push(node, object_type,
136 walk_state);
137 if (ACPI_FAILURE(status)) {
138 return_ACPI_STATUS(status);
139 }
140 } else {
141 /*
142 * The Path is an object reference to an existing object.
143 * Don't enter the name into the namespace, but look it up
144 * for use later.
145 */
146 status =
147 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
148 object_type, ACPI_IMODE_EXECUTE,
149 ACPI_NS_SEARCH_PARENT, walk_state,
150 &(node));
151 if (ACPI_FAILURE(status)) {
152 #ifdef ACPI_ASL_COMPILER
153 if (status == AE_NOT_FOUND) {
154 status = AE_OK;
155 } else {
156 ACPI_ERROR_NAMESPACE(walk_state->
157 scope_info,
158 buffer_ptr,
159 status);
160 }
161 #else
162 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
163 buffer_ptr, status);
164 #endif
165 return_ACPI_STATUS(status);
166 }
167 }
168
169 /*
170 * We must check to make sure that the target is
171 * one of the opcodes that actually opens a scope
172 */
173 switch (node->type) {
174 case ACPI_TYPE_ANY:
175 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
176 case ACPI_TYPE_DEVICE:
177 case ACPI_TYPE_POWER:
178 case ACPI_TYPE_PROCESSOR:
179 case ACPI_TYPE_THERMAL:
180
181 /* These are acceptable types */
182 break;
183
184 case ACPI_TYPE_INTEGER:
185 case ACPI_TYPE_STRING:
186 case ACPI_TYPE_BUFFER:
187
188 /*
189 * These types we will allow, but we will change the type.
190 * This enables some existing code of the form:
191 *
192 * Name (DEB, 0)
193 * Scope (DEB) { ... }
194 */
195 ACPI_WARNING((AE_INFO,
196 "Type override - [%4.4s] had invalid type (%s) "
197 "for Scope operator, changed to type ANY",
198 acpi_ut_get_node_name(node),
199 acpi_ut_get_type_name(node->type)));
200
201 node->type = ACPI_TYPE_ANY;
202 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
203 break;
204
205 case ACPI_TYPE_METHOD:
206
207 /*
208 * Allow scope change to root during execution of module-level
209 * code. Root is typed METHOD during this time.
210 */
211 if ((node == acpi_gbl_root_node) &&
212 (walk_state->
213 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
214 break;
215 }
216
217 /*lint -fallthrough */
218
219 default:
220
221 /* All other types are an error */
222
223 ACPI_ERROR((AE_INFO,
224 "Invalid type (%s) for target of "
225 "Scope operator [%4.4s] (Cannot override)",
226 acpi_ut_get_type_name(node->type),
227 acpi_ut_get_node_name(node)));
228
229 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
230 }
231 break;
232
233 default:
234
235 /* All other opcodes */
236
237 if (op && op->common.node) {
238
239 /* This op/node was previously entered into the namespace */
240
241 node = op->common.node;
242
243 if (acpi_ns_opens_scope(object_type)) {
244 status =
245 acpi_ds_scope_stack_push(node, object_type,
246 walk_state);
247 if (ACPI_FAILURE(status)) {
248 return_ACPI_STATUS(status);
249 }
250 }
251
252 return_ACPI_STATUS(AE_OK);
253 }
254
255 /*
256 * Enter the named type into the internal namespace. We enter the name
257 * as we go downward in the parse tree. Any necessary subobjects that
258 * involve arguments to the opcode must be created as we go back up the
259 * parse tree later.
260 *
261 * Note: Name may already exist if we are executing a deferred opcode.
262 */
263 if (walk_state->deferred_node) {
264
265 /* This name is already in the namespace, get the node */
266
267 node = walk_state->deferred_node;
268 status = AE_OK;
269 break;
270 }
271
272 flags = ACPI_NS_NO_UPSEARCH;
273 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
274
275 /* Execution mode, node cannot already exist, node is temporary */
276
277 flags |= ACPI_NS_ERROR_IF_FOUND;
278
279 if (!
280 (walk_state->
281 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
282 flags |= ACPI_NS_TEMPORARY;
283 }
284 }
285 #ifdef ACPI_ASL_COMPILER
286
287 /*
288 * Do not open a scope for AML_EXTERNAL_OP
289 * acpi_ns_lookup can open a new scope based on the object type
290 * of this op. AML_EXTERNAL_OP is a declaration rather than a
291 * definition. In the case that this external is a method object,
292 * acpi_ns_lookup will open a new scope. However, an AML_EXTERNAL_OP
293 * associated with the ACPI_TYPE_METHOD is a declaration, rather than
294 * a definition. Flags is set to avoid opening a scope for any
295 * AML_EXTERNAL_OP.
296 */
297 if (walk_state->opcode == AML_EXTERNAL_OP) {
298 flags |= ACPI_NS_DONT_OPEN_SCOPE;
299 }
300 #endif
301
302 /*
303 * For name creation opcodes, the full namepath prefix must
304 * exist, except for the final (new) nameseg.
305 */
306 if (walk_state->op_info->flags & AML_NAMED) {
307 flags |= ACPI_NS_PREFIX_MUST_EXIST;
308 }
309
310 /* Add new entry or lookup existing entry */
311
312 status =
313 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
314 object_type, ACPI_IMODE_LOAD_PASS2, flags,
315 walk_state, &node);
316
317 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
318 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
319 "***New Node [%4.4s] %p is temporary\n",
320 acpi_ut_get_node_name(node), node));
321 }
322 break;
323 }
324
325 if (ACPI_FAILURE(status)) {
326 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
327 buffer_ptr, status);
328 return_ACPI_STATUS(status);
329 }
330
331 if (!op) {
332
333 /* Create a new op */
334
335 op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
336 if (!op) {
337 return_ACPI_STATUS(AE_NO_MEMORY);
338 }
339
340 /* Initialize the new op */
341
342 if (node) {
343 op->named.name = node->name.integer;
344 }
345 *out_op = op;
346 }
347
348 /*
349 * Put the Node in the "op" object that the parser uses, so we
350 * can get it again quickly when this scope is closed
351 */
352 op->common.node = node;
353 return_ACPI_STATUS(status);
354 }
355
356 /*******************************************************************************
357 *
358 * FUNCTION: acpi_ds_load2_end_op
359 *
360 * PARAMETERS: walk_state - Current state of the parse tree walk
361 *
362 * RETURN: Status
363 *
364 * DESCRIPTION: Ascending callback used during the loading of the namespace,
365 * both control methods and everything else.
366 *
367 ******************************************************************************/
368
369 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
370 {
371 union acpi_parse_object *op;
372 acpi_status status = AE_OK;
373 acpi_object_type object_type;
374 struct acpi_namespace_node *node;
375 union acpi_parse_object *arg;
376 struct acpi_namespace_node *new_node;
377 u32 i;
378 u8 region_space;
379 #ifdef ACPI_EXEC_APP
380 union acpi_operand_object *obj_desc;
381 char *namepath;
382 #endif
383
384 ACPI_FUNCTION_TRACE(ds_load2_end_op);
385
386 op = walk_state->op;
387 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
388 walk_state->op_info->name, op, walk_state));
389
390 /* Check if opcode had an associated namespace object */
391
392 if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
393 return_ACPI_STATUS(AE_OK);
394 }
395
396 if (op->common.aml_opcode == AML_SCOPE_OP) {
397 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
398 "Ending scope Op=%p State=%p\n", op,
399 walk_state));
400 }
401
402 object_type = walk_state->op_info->object_type;
403
404 /*
405 * Get the Node/name from the earlier lookup
406 * (It was saved in the *op structure)
407 */
408 node = op->common.node;
409
410 /*
411 * Put the Node on the object stack (Contains the ACPI Name of
412 * this object)
413 */
414 walk_state->operands[0] = (void *)node;
415 walk_state->num_operands = 1;
416
417 /* Pop the scope stack */
418
419 if (acpi_ns_opens_scope(object_type) &&
420 (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
421 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
422 "(%s) Popping scope for Op %p\n",
423 acpi_ut_get_type_name(object_type), op));
424
425 status = acpi_ds_scope_stack_pop(walk_state);
426 if (ACPI_FAILURE(status)) {
427 goto cleanup;
428 }
429 }
430
431 /*
432 * Named operations are as follows:
433 *
434 * AML_ALIAS
435 * AML_BANKFIELD
436 * AML_CREATEBITFIELD
437 * AML_CREATEBYTEFIELD
438 * AML_CREATEDWORDFIELD
439 * AML_CREATEFIELD
440 * AML_CREATEQWORDFIELD
441 * AML_CREATEWORDFIELD
442 * AML_DATA_REGION
443 * AML_DEVICE
444 * AML_EVENT
445 * AML_FIELD
446 * AML_INDEXFIELD
447 * AML_METHOD
448 * AML_METHODCALL
449 * AML_MUTEX
450 * AML_NAME
451 * AML_NAMEDFIELD
452 * AML_OPREGION
453 * AML_POWERRES
454 * AML_PROCESSOR
455 * AML_SCOPE
456 * AML_THERMALZONE
457 */
458
459 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
460 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
461 acpi_ps_get_opcode_name(op->common.aml_opcode),
462 walk_state, op, node));
463
464 /* Decode the opcode */
465
466 arg = op->common.value.arg;
467
468 switch (walk_state->op_info->type) {
469
470 case AML_TYPE_CREATE_FIELD:
471 /*
472 * Create the field object, but the field buffer and index must
473 * be evaluated later during the execution phase
474 */
475 status = acpi_ds_create_buffer_field(op, walk_state);
476 if (ACPI_FAILURE(status)) {
477 ACPI_EXCEPTION((AE_INFO, status,
478 "CreateBufferField failure"));
479 goto cleanup;
480 }
481 break;
482
483 case AML_TYPE_NAMED_FIELD:
484 /*
485 * If we are executing a method, initialize the field
486 */
487 if (walk_state->method_node) {
488 status = acpi_ds_init_field_objects(op, walk_state);
489 }
490
491 switch (op->common.aml_opcode) {
492 case AML_INDEX_FIELD_OP:
493
494 status =
495 acpi_ds_create_index_field(op,
496 (acpi_handle)arg->common.
497 node, walk_state);
498 break;
499
500 case AML_BANK_FIELD_OP:
501
502 status =
503 acpi_ds_create_bank_field(op, arg->common.node,
504 walk_state);
505 break;
506
507 case AML_FIELD_OP:
508
509 status =
510 acpi_ds_create_field(op, arg->common.node,
511 walk_state);
512 break;
513
514 default:
515
516 /* All NAMED_FIELD opcodes must be handled above */
517 break;
518 }
519 break;
520
521 case AML_TYPE_NAMED_SIMPLE:
522
523 status = acpi_ds_create_operands(walk_state, arg);
524 if (ACPI_FAILURE(status)) {
525 goto cleanup;
526 }
527
528 switch (op->common.aml_opcode) {
529 case AML_PROCESSOR_OP:
530
531 status = acpi_ex_create_processor(walk_state);
532 break;
533
534 case AML_POWER_RESOURCE_OP:
535
536 status = acpi_ex_create_power_resource(walk_state);
537 break;
538
539 case AML_MUTEX_OP:
540
541 status = acpi_ex_create_mutex(walk_state);
542 break;
543
544 case AML_EVENT_OP:
545
546 status = acpi_ex_create_event(walk_state);
547 break;
548
549 case AML_ALIAS_OP:
550
551 status = acpi_ex_create_alias(walk_state);
552 break;
553
554 default:
555
556 /* Unknown opcode */
557
558 status = AE_OK;
559 goto cleanup;
560 }
561
562 /* Delete operands */
563
564 for (i = 1; i < walk_state->num_operands; i++) {
565 acpi_ut_remove_reference(walk_state->operands[i]);
566 walk_state->operands[i] = NULL;
567 }
568
569 break;
570
571 case AML_TYPE_NAMED_COMPLEX:
572
573 switch (op->common.aml_opcode) {
574 case AML_REGION_OP:
575 case AML_DATA_REGION_OP:
576
577 if (op->common.aml_opcode == AML_REGION_OP) {
578 region_space = (acpi_adr_space_type)
579 ((op->common.value.arg)->common.value.
580 integer);
581 } else {
582 region_space = ACPI_ADR_SPACE_DATA_TABLE;
583 }
584
585 /*
586 * The op_region is not fully parsed at this time. The only valid
587 * argument is the space_id. (We must save the address of the
588 * AML of the address and length operands)
589 *
590 * If we have a valid region, initialize it. The namespace is
591 * unlocked at this point.
592 *
593 * Need to unlock interpreter if it is locked (if we are running
594 * a control method), in order to allow _REG methods to be run
595 * during acpi_ev_initialize_region.
596 */
597 if (walk_state->method_node) {
598 /*
599 * Executing a method: initialize the region and unlock
600 * the interpreter
601 */
602 status = acpi_ex_create_region(op->named.data,
603 op->named.length,
604 region_space,
605 walk_state);
606 if (ACPI_FAILURE(status)) {
607 return_ACPI_STATUS(status);
608 }
609 }
610
611 status =
612 acpi_ev_initialize_region
613 (acpi_ns_get_attached_object(node));
614 break;
615
616 case AML_NAME_OP:
617
618 status = acpi_ds_create_node(walk_state, node, op);
619 if (ACPI_FAILURE(status)) {
620 goto cleanup;
621 }
622 #ifdef ACPI_EXEC_APP
623 /*
624 * acpi_exec support for namespace initialization file (initialize
625 * Name opcodes in this code.)
626 */
627 namepath = acpi_ns_get_external_pathname(node);
628 status = ae_lookup_init_file_entry(namepath, &obj_desc);
629 if (ACPI_SUCCESS(status)) {
630
631 /* Detach any existing object, attach new object */
632
633 if (node->object) {
634 acpi_ns_detach_object(node);
635 }
636 acpi_ns_attach_object(node, obj_desc,
637 obj_desc->common.type);
638 }
639 ACPI_FREE(namepath);
640 status = AE_OK;
641 #endif
642 break;
643
644 case AML_METHOD_OP:
645 /*
646 * method_op pkg_length name_string method_flags term_list
647 *
648 * Note: We must create the method node/object pair as soon as we
649 * see the method declaration. This allows later pass1 parsing
650 * of invocations of the method (need to know the number of
651 * arguments.)
652 */
653 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
654 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
655 walk_state, op, op->named.node));
656
657 if (!acpi_ns_get_attached_object(op->named.node)) {
658 walk_state->operands[0] =
659 ACPI_CAST_PTR(void, op->named.node);
660 walk_state->num_operands = 1;
661
662 status =
663 acpi_ds_create_operands(walk_state,
664 op->common.value.
665 arg);
666 if (ACPI_SUCCESS(status)) {
667 status =
668 acpi_ex_create_method(op->named.
669 data,
670 op->named.
671 length,
672 walk_state);
673 }
674
675 walk_state->operands[0] = NULL;
676 walk_state->num_operands = 0;
677
678 if (ACPI_FAILURE(status)) {
679 return_ACPI_STATUS(status);
680 }
681 }
682 break;
683
684 default:
685
686 /* All NAMED_COMPLEX opcodes must be handled above */
687 break;
688 }
689 break;
690
691 case AML_CLASS_INTERNAL:
692
693 /* case AML_INT_NAMEPATH_OP: */
694 break;
695
696 case AML_CLASS_METHOD_CALL:
697
698 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
699 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
700 walk_state, op, node));
701
702 /*
703 * Lookup the method name and save the Node
704 */
705 status =
706 acpi_ns_lookup(walk_state->scope_info,
707 arg->common.value.string, ACPI_TYPE_ANY,
708 ACPI_IMODE_LOAD_PASS2,
709 ACPI_NS_SEARCH_PARENT |
710 ACPI_NS_DONT_OPEN_SCOPE, walk_state,
711 &(new_node));
712 if (ACPI_SUCCESS(status)) {
713 /*
714 * Make sure that what we found is indeed a method
715 * We didn't search for a method on purpose, to see if the name
716 * would resolve
717 */
718 if (new_node->type != ACPI_TYPE_METHOD) {
719 status = AE_AML_OPERAND_TYPE;
720 }
721
722 /* We could put the returned object (Node) on the object stack for
723 * later, but for now, we will put it in the "op" object that the
724 * parser uses, so we can get it again at the end of this scope
725 */
726 op->common.node = new_node;
727 } else {
728 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
729 arg->common.value.string, status);
730 }
731 break;
732
733 default:
734
735 break;
736 }
737
738 cleanup:
739
740 /* Remove the Node pushed at the very beginning */
741
742 walk_state->operands[0] = NULL;
743 walk_state->num_operands = 0;
744 return_ACPI_STATUS(status);
745 }