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[cor_2_6_31.git] / drivers / acpi / acpica / dswload.c
blob3023ceaa8d544d8d0c52a53d0dff2dc13facbd6c
1 /******************************************************************************
2 *
3 * Module Name: dswload - Dispatcher namespace load callbacks
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2008, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acdispat.h"
49 #include "acinterp.h"
50 #include "acnamesp.h"
51 #include "acevents.h"
52
53 #ifdef ACPI_ASL_COMPILER
54 #include <acpi/acdisasm.h>
55 #endif
56
57 #define _COMPONENT ACPI_DISPATCHER
58 ACPI_MODULE_NAME("dswload")
59
60 /*******************************************************************************
61 *
62 * FUNCTION: acpi_ds_init_callbacks
63 *
64 * PARAMETERS: walk_state - Current state of the parse tree walk
65 * pass_number - 1, 2, or 3
66 *
67 * RETURN: Status
68 *
69 * DESCRIPTION: Init walk state callbacks
70 *
71 ******************************************************************************/
72 acpi_status
73 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
74 {
75
76 switch (pass_number) {
77 case 1:
78 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
79 ACPI_PARSE_DELETE_TREE;
80 walk_state->descending_callback = acpi_ds_load1_begin_op;
81 walk_state->ascending_callback = acpi_ds_load1_end_op;
82 break;
83
84 case 2:
85 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
86 ACPI_PARSE_DELETE_TREE;
87 walk_state->descending_callback = acpi_ds_load2_begin_op;
88 walk_state->ascending_callback = acpi_ds_load2_end_op;
89 break;
90
91 case 3:
92 #ifndef ACPI_NO_METHOD_EXECUTION
93 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
94 ACPI_PARSE_DELETE_TREE;
95 walk_state->descending_callback = acpi_ds_exec_begin_op;
96 walk_state->ascending_callback = acpi_ds_exec_end_op;
97 #endif
98 break;
99
100 default:
101 return (AE_BAD_PARAMETER);
102 }
103
104 return (AE_OK);
105 }
106
107 /*******************************************************************************
108 *
109 * FUNCTION: acpi_ds_load1_begin_op
110 *
111 * PARAMETERS: walk_state - Current state of the parse tree walk
112 * out_op - Where to return op if a new one is created
113 *
114 * RETURN: Status
115 *
116 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
117 *
118 ******************************************************************************/
119
120 acpi_status
121 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
122 union acpi_parse_object ** out_op)
123 {
124 union acpi_parse_object *op;
125 struct acpi_namespace_node *node;
126 acpi_status status;
127 acpi_object_type object_type;
128 char *path;
129 u32 flags;
130
131 ACPI_FUNCTION_TRACE(ds_load1_begin_op);
132
133 op = walk_state->op;
134 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
135 walk_state));
136
137 /* We are only interested in opcodes that have an associated name */
138
139 if (op) {
140 if (!(walk_state->op_info->flags & AML_NAMED)) {
141 *out_op = op;
142 return_ACPI_STATUS(AE_OK);
143 }
144
145 /* Check if this object has already been installed in the namespace */
146
147 if (op->common.node) {
148 *out_op = op;
149 return_ACPI_STATUS(AE_OK);
150 }
151 }
152
153 path = acpi_ps_get_next_namestring(&walk_state->parser_state);
154
155 /* Map the raw opcode into an internal object type */
156
157 object_type = walk_state->op_info->object_type;
158
159 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
160 "State=%p Op=%p [%s]\n", walk_state, op,
161 acpi_ut_get_type_name(object_type)));
162
163 switch (walk_state->opcode) {
164 case AML_SCOPE_OP:
165
166 /*
167 * The target name of the Scope() operator must exist at this point so
168 * that we can actually open the scope to enter new names underneath it.
169 * Allow search-to-root for single namesegs.
170 */
171 status =
172 acpi_ns_lookup(walk_state->scope_info, path, object_type,
173 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
174 walk_state, &(node));
175 #ifdef ACPI_ASL_COMPILER
176 if (status == AE_NOT_FOUND) {
177 /*
178 * Table disassembly:
179 * Target of Scope() not found. Generate an External for it, and
180 * insert the name into the namespace.
181 */
182 acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
183 status =
184 acpi_ns_lookup(walk_state->scope_info, path,
185 object_type, ACPI_IMODE_LOAD_PASS1,
186 ACPI_NS_SEARCH_PARENT, walk_state,
187 &node);
188 }
189 #endif
190 if (ACPI_FAILURE(status)) {
191 ACPI_ERROR_NAMESPACE(path, status);
192 return_ACPI_STATUS(status);
193 }
194
195 /*
196 * Check to make sure that the target is
197 * one of the opcodes that actually opens a scope
198 */
199 switch (node->type) {
200 case ACPI_TYPE_ANY:
201 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
202 case ACPI_TYPE_DEVICE:
203 case ACPI_TYPE_POWER:
204 case ACPI_TYPE_PROCESSOR:
205 case ACPI_TYPE_THERMAL:
206
207 /* These are acceptable types */
208 break;
209
210 case ACPI_TYPE_INTEGER:
211 case ACPI_TYPE_STRING:
212 case ACPI_TYPE_BUFFER:
213
214 /*
215 * These types we will allow, but we will change the type. This
216 * enables some existing code of the form:
217 *
218 * Name (DEB, 0)
219 * Scope (DEB) { ... }
220 *
221 * Note: silently change the type here. On the second pass, we will report
222 * a warning
223 */
224 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
225 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
226 path,
227 acpi_ut_get_type_name(node->type)));
228
229 node->type = ACPI_TYPE_ANY;
230 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
231 break;
232
233 default:
234
235 /* All other types are an error */
236
237 ACPI_ERROR((AE_INFO,
238 "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
239 acpi_ut_get_type_name(node->type), path));
240
241 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
242 }
243 break;
244
245 default:
246 /*
247 * For all other named opcodes, we will enter the name into
248 * the namespace.
249 *
250 * Setup the search flags.
251 * Since we are entering a name into the namespace, we do not want to
252 * enable the search-to-root upsearch.
253 *
254 * There are only two conditions where it is acceptable that the name
255 * already exists:
256 * 1) the Scope() operator can reopen a scoping object that was
257 * previously defined (Scope, Method, Device, etc.)
258 * 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
259 * buffer_field, or Package), the name of the object is already
260 * in the namespace.
261 */
262 if (walk_state->deferred_node) {
263
264 /* This name is already in the namespace, get the node */
265
266 node = walk_state->deferred_node;
267 status = AE_OK;
268 break;
269 }
270
271 /*
272 * If we are executing a method, do not create any namespace objects
273 * during the load phase, only during execution.
274 */
275 if (walk_state->method_node) {
276 node = NULL;
277 status = AE_OK;
278 break;
279 }
280
281 flags = ACPI_NS_NO_UPSEARCH;
282 if ((walk_state->opcode != AML_SCOPE_OP) &&
283 (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
284 flags |= ACPI_NS_ERROR_IF_FOUND;
285 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
286 "[%s] Cannot already exist\n",
287 acpi_ut_get_type_name(object_type)));
288 } else {
289 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
290 "[%s] Both Find or Create allowed\n",
291 acpi_ut_get_type_name(object_type)));
292 }
293
294 /*
295 * Enter the named type into the internal namespace. We enter the name
296 * as we go downward in the parse tree. Any necessary subobjects that
297 * involve arguments to the opcode must be created as we go back up the
298 * parse tree later.
299 */
300 status =
301 acpi_ns_lookup(walk_state->scope_info, path, object_type,
302 ACPI_IMODE_LOAD_PASS1, flags, walk_state,
303 &node);
304 if (ACPI_FAILURE(status)) {
305 if (status == AE_ALREADY_EXISTS) {
306
307 /* The name already exists in this scope */
308
309 if (node->flags & ANOBJ_IS_EXTERNAL) {
310 /*
311 * Allow one create on an object or segment that was
312 * previously declared External
313 */
314 node->flags &= ~ANOBJ_IS_EXTERNAL;
315 node->type = (u8) object_type;
316
317 /* Just retyped a node, probably will need to open a scope */
318
319 if (acpi_ns_opens_scope(object_type)) {
320 status =
321 acpi_ds_scope_stack_push
322 (node, object_type,
323 walk_state);
324 if (ACPI_FAILURE(status)) {
325 return_ACPI_STATUS
326 (status);
327 }
328 }
329
330 status = AE_OK;
331 }
332 }
333
334 if (ACPI_FAILURE(status)) {
335 ACPI_ERROR_NAMESPACE(path, status);
336 return_ACPI_STATUS(status);
337 }
338 }
339 break;
340 }
341
342 /* Common exit */
343
344 if (!op) {
345
346 /* Create a new op */
347
348 op = acpi_ps_alloc_op(walk_state->opcode);
349 if (!op) {
350 return_ACPI_STATUS(AE_NO_MEMORY);
351 }
352 }
353
354 /* Initialize the op */
355
356 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
357 op->named.path = ACPI_CAST_PTR(u8, path);
358 #endif
359
360 if (node) {
361 /*
362 * Put the Node in the "op" object that the parser uses, so we
363 * can get it again quickly when this scope is closed
364 */
365 op->common.node = node;
366 op->named.name = node->name.integer;
367 }
368
369 acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
370 op);
371 *out_op = op;
372 return_ACPI_STATUS(status);
373 }
374
375 /*******************************************************************************
376 *
377 * FUNCTION: acpi_ds_load1_end_op
378 *
379 * PARAMETERS: walk_state - Current state of the parse tree walk
380 *
381 * RETURN: Status
382 *
383 * DESCRIPTION: Ascending callback used during the loading of the namespace,
384 * both control methods and everything else.
385 *
386 ******************************************************************************/
387
388 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
389 {
390 union acpi_parse_object *op;
391 acpi_object_type object_type;
392 acpi_status status = AE_OK;
393
394 ACPI_FUNCTION_TRACE(ds_load1_end_op);
395
396 op = walk_state->op;
397 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
398 walk_state));
399
400 /* We are only interested in opcodes that have an associated name */
401
402 if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
403 return_ACPI_STATUS(AE_OK);
404 }
405
406 /* Get the object type to determine if we should pop the scope */
407
408 object_type = walk_state->op_info->object_type;
409
410 #ifndef ACPI_NO_METHOD_EXECUTION
411 if (walk_state->op_info->flags & AML_FIELD) {
412 /*
413 * If we are executing a method, do not create any namespace objects
414 * during the load phase, only during execution.
415 */
416 if (!walk_state->method_node) {
417 if (walk_state->opcode == AML_FIELD_OP ||
418 walk_state->opcode == AML_BANK_FIELD_OP ||
419 walk_state->opcode == AML_INDEX_FIELD_OP) {
420 status =
421 acpi_ds_init_field_objects(op, walk_state);
422 }
423 }
424 return_ACPI_STATUS(status);
425 }
426
427 /*
428 * If we are executing a method, do not create any namespace objects
429 * during the load phase, only during execution.
430 */
431 if (!walk_state->method_node) {
432 if (op->common.aml_opcode == AML_REGION_OP) {
433 status =
434 acpi_ex_create_region(op->named.data,
435 op->named.length,
436 (acpi_adr_space_type) ((op->
437 common.
438 value.
439 arg)->
440 common.
441 value.
442 integer),
443 walk_state);
444 if (ACPI_FAILURE(status)) {
445 return_ACPI_STATUS(status);
446 }
447 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
448 status =
449 acpi_ex_create_region(op->named.data,
450 op->named.length,
451 REGION_DATA_TABLE,
452 walk_state);
453 if (ACPI_FAILURE(status)) {
454 return_ACPI_STATUS(status);
455 }
456 }
457 }
458 #endif
459
460 if (op->common.aml_opcode == AML_NAME_OP) {
461
462 /* For Name opcode, get the object type from the argument */
463
464 if (op->common.value.arg) {
465 object_type = (acpi_ps_get_opcode_info((op->common.
466 value.arg)->
467 common.
468 aml_opcode))->
469 object_type;
470
471 /* Set node type if we have a namespace node */
472
473 if (op->common.node) {
474 op->common.node->type = (u8) object_type;
475 }
476 }
477 }
478
479 /*
480 * If we are executing a method, do not create any namespace objects
481 * during the load phase, only during execution.
482 */
483 if (!walk_state->method_node) {
484 if (op->common.aml_opcode == AML_METHOD_OP) {
485 /*
486 * method_op pkg_length name_string method_flags term_list
487 *
488 * Note: We must create the method node/object pair as soon as we
489 * see the method declaration. This allows later pass1 parsing
490 * of invocations of the method (need to know the number of
491 * arguments.)
492 */
493 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
494 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
495 walk_state, op, op->named.node));
496
497 if (!acpi_ns_get_attached_object(op->named.node)) {
498 walk_state->operands[0] =
499 ACPI_CAST_PTR(void, op->named.node);
500 walk_state->num_operands = 1;
501
502 status =
503 acpi_ds_create_operands(walk_state,
504 op->common.value.
505 arg);
506 if (ACPI_SUCCESS(status)) {
507 status =
508 acpi_ex_create_method(op->named.
509 data,
510 op->named.
511 length,
512 walk_state);
513 }
514
515 walk_state->operands[0] = NULL;
516 walk_state->num_operands = 0;
517
518 if (ACPI_FAILURE(status)) {
519 return_ACPI_STATUS(status);
520 }
521 }
522 }
523 }
524
525 /* Pop the scope stack (only if loading a table) */
526
527 if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
528 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
529 "(%s): Popping scope for Op %p\n",
530 acpi_ut_get_type_name(object_type), op));
531
532 status = acpi_ds_scope_stack_pop(walk_state);
533 }
534
535 return_ACPI_STATUS(status);
536 }
537
538 /*******************************************************************************
539 *
540 * FUNCTION: acpi_ds_load2_begin_op
541 *
542 * PARAMETERS: walk_state - Current state of the parse tree walk
543 * out_op - Wher to return op if a new one is created
544 *
545 * RETURN: Status
546 *
547 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
548 *
549 ******************************************************************************/
550
551 acpi_status
552 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
553 union acpi_parse_object **out_op)
554 {
555 union acpi_parse_object *op;
556 struct acpi_namespace_node *node;
557 acpi_status status;
558 acpi_object_type object_type;
559 char *buffer_ptr;
560 u32 flags;
561
562 ACPI_FUNCTION_TRACE(ds_load2_begin_op);
563
564 op = walk_state->op;
565 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
566 walk_state));
567
568 if (op) {
569 if ((walk_state->control_state) &&
570 (walk_state->control_state->common.state ==
571 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
572
573 /* We are executing a while loop outside of a method */
574
575 status = acpi_ds_exec_begin_op(walk_state, out_op);
576 return_ACPI_STATUS(status);
577 }
578
579 /* We only care about Namespace opcodes here */
580
581 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
582 (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
583 (!(walk_state->op_info->flags & AML_NAMED))) {
584 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
585 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
586 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
587 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
588 "Begin/EXEC: %s (fl %8.8X)\n",
589 walk_state->op_info->name,
590 walk_state->op_info->flags));
591
592 /* Executing a type1 or type2 opcode outside of a method */
593
594 status =
595 acpi_ds_exec_begin_op(walk_state, out_op);
596 return_ACPI_STATUS(status);
597 }
598 #endif
599 return_ACPI_STATUS(AE_OK);
600 }
601
602 /* Get the name we are going to enter or lookup in the namespace */
603
604 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
605
606 /* For Namepath op, get the path string */
607
608 buffer_ptr = op->common.value.string;
609 if (!buffer_ptr) {
610
611 /* No name, just exit */
612
613 return_ACPI_STATUS(AE_OK);
614 }
615 } else {
616 /* Get name from the op */
617
618 buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
619 }
620 } else {
621 /* Get the namestring from the raw AML */
622
623 buffer_ptr =
624 acpi_ps_get_next_namestring(&walk_state->parser_state);
625 }
626
627 /* Map the opcode into an internal object type */
628
629 object_type = walk_state->op_info->object_type;
630
631 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
632 "State=%p Op=%p Type=%X\n", walk_state, op,
633 object_type));
634
635 switch (walk_state->opcode) {
636 case AML_FIELD_OP:
637 case AML_BANK_FIELD_OP:
638 case AML_INDEX_FIELD_OP:
639
640 node = NULL;
641 status = AE_OK;
642 break;
643
644 case AML_INT_NAMEPATH_OP:
645 /*
646 * The name_path is an object reference to an existing object.
647 * Don't enter the name into the namespace, but look it up
648 * for use later.
649 */
650 status =
651 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
652 object_type, ACPI_IMODE_EXECUTE,
653 ACPI_NS_SEARCH_PARENT, walk_state, &(node));
654 break;
655
656 case AML_SCOPE_OP:
657 /*
658 * The Path is an object reference to an existing object.
659 * Don't enter the name into the namespace, but look it up
660 * for use later.
661 */
662 status =
663 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
664 object_type, ACPI_IMODE_EXECUTE,
665 ACPI_NS_SEARCH_PARENT, walk_state, &(node));
666 if (ACPI_FAILURE(status)) {
667 #ifdef ACPI_ASL_COMPILER
668 if (status == AE_NOT_FOUND) {
669 status = AE_OK;
670 } else {
671 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
672 }
673 #else
674 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
675 #endif
676 return_ACPI_STATUS(status);
677 }
678
679 /*
680 * We must check to make sure that the target is
681 * one of the opcodes that actually opens a scope
682 */
683 switch (node->type) {
684 case ACPI_TYPE_ANY:
685 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
686 case ACPI_TYPE_DEVICE:
687 case ACPI_TYPE_POWER:
688 case ACPI_TYPE_PROCESSOR:
689 case ACPI_TYPE_THERMAL:
690
691 /* These are acceptable types */
692 break;
693
694 case ACPI_TYPE_INTEGER:
695 case ACPI_TYPE_STRING:
696 case ACPI_TYPE_BUFFER:
697
698 /*
699 * These types we will allow, but we will change the type. This
700 * enables some existing code of the form:
701 *
702 * Name (DEB, 0)
703 * Scope (DEB) { ... }
704 */
705 ACPI_WARNING((AE_INFO,
706 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
707 buffer_ptr,
708 acpi_ut_get_type_name(node->type)));
709
710 node->type = ACPI_TYPE_ANY;
711 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
712 break;
713
714 default:
715
716 /* All other types are an error */
717
718 ACPI_ERROR((AE_INFO,
719 "Invalid type (%s) for target of Scope operator [%4.4s]",
720 acpi_ut_get_type_name(node->type),
721 buffer_ptr));
722
723 return (AE_AML_OPERAND_TYPE);
724 }
725 break;
726
727 default:
728
729 /* All other opcodes */
730
731 if (op && op->common.node) {
732
733 /* This op/node was previously entered into the namespace */
734
735 node = op->common.node;
736
737 if (acpi_ns_opens_scope(object_type)) {
738 status =
739 acpi_ds_scope_stack_push(node, object_type,
740 walk_state);
741 if (ACPI_FAILURE(status)) {
742 return_ACPI_STATUS(status);
743 }
744 }
745
746 return_ACPI_STATUS(AE_OK);
747 }
748
749 /*
750 * Enter the named type into the internal namespace. We enter the name
751 * as we go downward in the parse tree. Any necessary subobjects that
752 * involve arguments to the opcode must be created as we go back up the
753 * parse tree later.
754 *
755 * Note: Name may already exist if we are executing a deferred opcode.
756 */
757 if (walk_state->deferred_node) {
758
759 /* This name is already in the namespace, get the node */
760
761 node = walk_state->deferred_node;
762 status = AE_OK;
763 break;
764 }
765
766 flags = ACPI_NS_NO_UPSEARCH;
767 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
768
769 /* Execution mode, node cannot already exist, node is temporary */
770
771 flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
772 }
773
774 /* Add new entry or lookup existing entry */
775
776 status =
777 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
778 object_type, ACPI_IMODE_LOAD_PASS2, flags,
779 walk_state, &node);
780
781 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
782 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
783 "***New Node [%4.4s] %p is temporary\n",
784 acpi_ut_get_node_name(node), node));
785 }
786 break;
787 }
788
789 if (ACPI_FAILURE(status)) {
790 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
791 return_ACPI_STATUS(status);
792 }
793
794 if (!op) {
795
796 /* Create a new op */
797
798 op = acpi_ps_alloc_op(walk_state->opcode);
799 if (!op) {
800 return_ACPI_STATUS(AE_NO_MEMORY);
801 }
802
803 /* Initialize the new op */
804
805 if (node) {
806 op->named.name = node->name.integer;
807 }
808 *out_op = op;
809 }
810
811 /*
812 * Put the Node in the "op" object that the parser uses, so we
813 * can get it again quickly when this scope is closed
814 */
815 op->common.node = node;
816 return_ACPI_STATUS(status);
817 }
818
819 /*******************************************************************************
820 *
821 * FUNCTION: acpi_ds_load2_end_op
822 *
823 * PARAMETERS: walk_state - Current state of the parse tree walk
824 *
825 * RETURN: Status
826 *
827 * DESCRIPTION: Ascending callback used during the loading of the namespace,
828 * both control methods and everything else.
829 *
830 ******************************************************************************/
831
832 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
833 {
834 union acpi_parse_object *op;
835 acpi_status status = AE_OK;
836 acpi_object_type object_type;
837 struct acpi_namespace_node *node;
838 union acpi_parse_object *arg;
839 struct acpi_namespace_node *new_node;
840 #ifndef ACPI_NO_METHOD_EXECUTION
841 u32 i;
842 u8 region_space;
843 #endif
844
845 ACPI_FUNCTION_TRACE(ds_load2_end_op);
846
847 op = walk_state->op;
848 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
849 walk_state->op_info->name, op, walk_state));
850
851 /* Check if opcode had an associated namespace object */
852
853 if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
854 #ifndef ACPI_NO_METHOD_EXECUTION
855 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
856 /* No namespace object. Executable opcode? */
857
858 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
859 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
860 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
861 "End/EXEC: %s (fl %8.8X)\n",
862 walk_state->op_info->name,
863 walk_state->op_info->flags));
864
865 /* Executing a type1 or type2 opcode outside of a method */
866
867 status = acpi_ds_exec_end_op(walk_state);
868 return_ACPI_STATUS(status);
869 }
870 #endif
871 #endif
872 return_ACPI_STATUS(AE_OK);
873 }
874
875 if (op->common.aml_opcode == AML_SCOPE_OP) {
876 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
877 "Ending scope Op=%p State=%p\n", op,
878 walk_state));
879 }
880
881 object_type = walk_state->op_info->object_type;
882
883 /*
884 * Get the Node/name from the earlier lookup
885 * (It was saved in the *op structure)
886 */
887 node = op->common.node;
888
889 /*
890 * Put the Node on the object stack (Contains the ACPI Name of
891 * this object)
892 */
893 walk_state->operands[0] = (void *)node;
894 walk_state->num_operands = 1;
895
896 /* Pop the scope stack */
897
898 if (acpi_ns_opens_scope(object_type) &&
899 (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
900 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
901 "(%s) Popping scope for Op %p\n",
902 acpi_ut_get_type_name(object_type), op));
903
904 status = acpi_ds_scope_stack_pop(walk_state);
905 if (ACPI_FAILURE(status)) {
906 goto cleanup;
907 }
908 }
909
910 /*
911 * Named operations are as follows:
912 *
913 * AML_ALIAS
914 * AML_BANKFIELD
915 * AML_CREATEBITFIELD
916 * AML_CREATEBYTEFIELD
917 * AML_CREATEDWORDFIELD
918 * AML_CREATEFIELD
919 * AML_CREATEQWORDFIELD
920 * AML_CREATEWORDFIELD
921 * AML_DATA_REGION
922 * AML_DEVICE
923 * AML_EVENT
924 * AML_FIELD
925 * AML_INDEXFIELD
926 * AML_METHOD
927 * AML_METHODCALL
928 * AML_MUTEX
929 * AML_NAME
930 * AML_NAMEDFIELD
931 * AML_OPREGION
932 * AML_POWERRES
933 * AML_PROCESSOR
934 * AML_SCOPE
935 * AML_THERMALZONE
936 */
937
938 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
939 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
940 acpi_ps_get_opcode_name(op->common.aml_opcode),
941 walk_state, op, node));
942
943 /* Decode the opcode */
944
945 arg = op->common.value.arg;
946
947 switch (walk_state->op_info->type) {
948 #ifndef ACPI_NO_METHOD_EXECUTION
949
950 case AML_TYPE_CREATE_FIELD:
951 /*
952 * Create the field object, but the field buffer and index must
953 * be evaluated later during the execution phase
954 */
955 status = acpi_ds_create_buffer_field(op, walk_state);
956 break;
957
958 case AML_TYPE_NAMED_FIELD:
959 /*
960 * If we are executing a method, initialize the field
961 */
962 if (walk_state->method_node) {
963 status = acpi_ds_init_field_objects(op, walk_state);
964 }
965
966 switch (op->common.aml_opcode) {
967 case AML_INDEX_FIELD_OP:
968
969 status =
970 acpi_ds_create_index_field(op,
971 (acpi_handle) arg->
972 common.node, walk_state);
973 break;
974
975 case AML_BANK_FIELD_OP:
976
977 status =
978 acpi_ds_create_bank_field(op, arg->common.node,
979 walk_state);
980 break;
981
982 case AML_FIELD_OP:
983
984 status =
985 acpi_ds_create_field(op, arg->common.node,
986 walk_state);
987 break;
988
989 default:
990 /* All NAMED_FIELD opcodes must be handled above */
991 break;
992 }
993 break;
994
995 case AML_TYPE_NAMED_SIMPLE:
996
997 status = acpi_ds_create_operands(walk_state, arg);
998 if (ACPI_FAILURE(status)) {
999 goto cleanup;
1000 }
1001
1002 switch (op->common.aml_opcode) {
1003 case AML_PROCESSOR_OP:
1004
1005 status = acpi_ex_create_processor(walk_state);
1006 break;
1007
1008 case AML_POWER_RES_OP:
1009
1010 status = acpi_ex_create_power_resource(walk_state);
1011 break;
1012
1013 case AML_MUTEX_OP:
1014
1015 status = acpi_ex_create_mutex(walk_state);
1016 break;
1017
1018 case AML_EVENT_OP:
1019
1020 status = acpi_ex_create_event(walk_state);
1021 break;
1022
1023 case AML_ALIAS_OP:
1024
1025 status = acpi_ex_create_alias(walk_state);
1026 break;
1027
1028 default:
1029 /* Unknown opcode */
1030
1031 status = AE_OK;
1032 goto cleanup;
1033 }
1034
1035 /* Delete operands */
1036
1037 for (i = 1; i < walk_state->num_operands; i++) {
1038 acpi_ut_remove_reference(walk_state->operands[i]);
1039 walk_state->operands[i] = NULL;
1040 }
1041
1042 break;
1043 #endif /* ACPI_NO_METHOD_EXECUTION */
1044
1045 case AML_TYPE_NAMED_COMPLEX:
1046
1047 switch (op->common.aml_opcode) {
1048 #ifndef ACPI_NO_METHOD_EXECUTION
1049 case AML_REGION_OP:
1050 case AML_DATA_REGION_OP:
1051
1052 if (op->common.aml_opcode == AML_REGION_OP) {
1053 region_space = (acpi_adr_space_type)
1054 ((op->common.value.arg)->common.value.
1055 integer);
1056 } else {
1057 region_space = REGION_DATA_TABLE;
1058 }
1059
1060 /*
1061 * If we are executing a method, initialize the region
1062 */
1063 if (walk_state->method_node) {
1064 status =
1065 acpi_ex_create_region(op->named.data,
1066 op->named.length,
1067 region_space,
1068 walk_state);
1069 if (ACPI_FAILURE(status)) {
1070 return (status);
1071 }
1072 }
1073
1074 /*
1075 * The op_region is not fully parsed at this time. Only valid
1076 * argument is the space_id. (We must save the address of the
1077 * AML of the address and length operands)
1078 */
1079
1080 /*
1081 * If we have a valid region, initialize it
1082 * Namespace is NOT locked at this point.
1083 */
1084 status =
1085 acpi_ev_initialize_region
1086 (acpi_ns_get_attached_object(node), FALSE);
1087 if (ACPI_FAILURE(status)) {
1088 /*
1089 * If AE_NOT_EXIST is returned, it is not fatal
1090 * because many regions get created before a handler
1091 * is installed for said region.
1092 */
1093 if (AE_NOT_EXIST == status) {
1094 status = AE_OK;
1095 }
1096 }
1097 break;
1098
1099 case AML_NAME_OP:
1100
1101 status = acpi_ds_create_node(walk_state, node, op);
1102 break;
1103
1104 case AML_METHOD_OP:
1105 /*
1106 * method_op pkg_length name_string method_flags term_list
1107 *
1108 * Note: We must create the method node/object pair as soon as we
1109 * see the method declaration. This allows later pass1 parsing
1110 * of invocations of the method (need to know the number of
1111 * arguments.)
1112 */
1113 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1114 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1115 walk_state, op, op->named.node));
1116
1117 if (!acpi_ns_get_attached_object(op->named.node)) {
1118 walk_state->operands[0] =
1119 ACPI_CAST_PTR(void, op->named.node);
1120 walk_state->num_operands = 1;
1121
1122 status =
1123 acpi_ds_create_operands(walk_state,
1124 op->common.value.
1125 arg);
1126 if (ACPI_SUCCESS(status)) {
1127 status =
1128 acpi_ex_create_method(op->named.
1129 data,
1130 op->named.
1131 length,
1132 walk_state);
1133 }
1134 walk_state->operands[0] = NULL;
1135 walk_state->num_operands = 0;
1136
1137 if (ACPI_FAILURE(status)) {
1138 return_ACPI_STATUS(status);
1139 }
1140 }
1141 break;
1142
1143 #endif /* ACPI_NO_METHOD_EXECUTION */
1144
1145 default:
1146 /* All NAMED_COMPLEX opcodes must be handled above */
1147 break;
1148 }
1149 break;
1150
1151 case AML_CLASS_INTERNAL:
1152
1153 /* case AML_INT_NAMEPATH_OP: */
1154 break;
1155
1156 case AML_CLASS_METHOD_CALL:
1157
1158 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1159 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1160 walk_state, op, node));
1161
1162 /*
1163 * Lookup the method name and save the Node
1164 */
1165 status =
1166 acpi_ns_lookup(walk_state->scope_info,
1167 arg->common.value.string, ACPI_TYPE_ANY,
1168 ACPI_IMODE_LOAD_PASS2,
1169 ACPI_NS_SEARCH_PARENT |
1170 ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1171 &(new_node));
1172 if (ACPI_SUCCESS(status)) {
1173 /*
1174 * Make sure that what we found is indeed a method
1175 * We didn't search for a method on purpose, to see if the name
1176 * would resolve
1177 */
1178 if (new_node->type != ACPI_TYPE_METHOD) {
1179 status = AE_AML_OPERAND_TYPE;
1180 }
1181
1182 /* We could put the returned object (Node) on the object stack for
1183 * later, but for now, we will put it in the "op" object that the
1184 * parser uses, so we can get it again at the end of this scope
1185 */
1186 op->common.node = new_node;
1187 } else {
1188 ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1189 }
1190 break;
1191
1192 default:
1193 break;
1194 }
1195
1196 cleanup:
1197
1198 /* Remove the Node pushed at the very beginning */
1199
1200 walk_state->operands[0] = NULL;
1201 walk_state->num_operands = 0;
1202 return_ACPI_STATUS(status);
1203 }
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