Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / dswload2.c
1 /******************************************************************************
2  *
3  * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2012, 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 #define _COMPONENT          ACPI_DISPATCHER
54 ACPI_MODULE_NAME("dswload2")
55
56 /*******************************************************************************
57  *
58  * FUNCTION:    acpi_ds_load2_begin_op
59  *
60  * PARAMETERS:  walk_state      - Current state of the parse tree walk
61  *              out_op          - Wher to return op if a new one is created
62  *
63  * RETURN:      Status
64  *
65  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
66  *
67  ******************************************************************************/
68 acpi_status
69 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
70                        union acpi_parse_object **out_op)
71 {
72         union acpi_parse_object *op;
73         struct acpi_namespace_node *node;
74         acpi_status status;
75         acpi_object_type object_type;
76         char *buffer_ptr;
77         u32 flags;
78
79         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
80
81         op = walk_state->op;
82         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
83                           walk_state));
84
85         if (op) {
86                 if ((walk_state->control_state) &&
87                     (walk_state->control_state->common.state ==
88                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
89
90                         /* We are executing a while loop outside of a method */
91
92                         status = acpi_ds_exec_begin_op(walk_state, out_op);
93                         return_ACPI_STATUS(status);
94                 }
95
96                 /* We only care about Namespace opcodes here */
97
98                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
99                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
100                     (!(walk_state->op_info->flags & AML_NAMED))) {
101                         return_ACPI_STATUS(AE_OK);
102                 }
103
104                 /* Get the name we are going to enter or lookup in the namespace */
105
106                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
107
108                         /* For Namepath op, get the path string */
109
110                         buffer_ptr = op->common.value.string;
111                         if (!buffer_ptr) {
112
113                                 /* No name, just exit */
114
115                                 return_ACPI_STATUS(AE_OK);
116                         }
117                 } else {
118                         /* Get name from the op */
119
120                         buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
121                 }
122         } else {
123                 /* Get the namestring from the raw AML */
124
125                 buffer_ptr =
126                     acpi_ps_get_next_namestring(&walk_state->parser_state);
127         }
128
129         /* Map the opcode into an internal object type */
130
131         object_type = walk_state->op_info->object_type;
132
133         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
134                           "State=%p Op=%p Type=%X\n", walk_state, op,
135                           object_type));
136
137         switch (walk_state->opcode) {
138         case AML_FIELD_OP:
139         case AML_BANK_FIELD_OP:
140         case AML_INDEX_FIELD_OP:
141
142                 node = NULL;
143                 status = AE_OK;
144                 break;
145
146         case AML_INT_NAMEPATH_OP:
147                 /*
148                  * The name_path is an object reference to an existing object.
149                  * Don't enter the name into the namespace, but look it up
150                  * for use later.
151                  */
152                 status =
153                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
154                                    object_type, ACPI_IMODE_EXECUTE,
155                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
156                 break;
157
158         case AML_SCOPE_OP:
159
160                 /* Special case for Scope(\) -> refers to the Root node */
161
162                 if (op && (op->named.node == acpi_gbl_root_node)) {
163                         node = op->named.node;
164
165                         status =
166                             acpi_ds_scope_stack_push(node, object_type,
167                                                      walk_state);
168                         if (ACPI_FAILURE(status)) {
169                                 return_ACPI_STATUS(status);
170                         }
171                 } else {
172                         /*
173                          * The Path is an object reference to an existing object.
174                          * Don't enter the name into the namespace, but look it up
175                          * for use later.
176                          */
177                         status =
178                             acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
179                                            object_type, ACPI_IMODE_EXECUTE,
180                                            ACPI_NS_SEARCH_PARENT, walk_state,
181                                            &(node));
182                         if (ACPI_FAILURE(status)) {
183 #ifdef ACPI_ASL_COMPILER
184                                 if (status == AE_NOT_FOUND) {
185                                         status = AE_OK;
186                                 } else {
187                                         ACPI_ERROR_NAMESPACE(buffer_ptr,
188                                                              status);
189                                 }
190 #else
191                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
192 #endif
193                                 return_ACPI_STATUS(status);
194                         }
195                 }
196
197                 /*
198                  * We must check to make sure that the target is
199                  * one of the opcodes that actually opens a scope
200                  */
201                 switch (node->type) {
202                 case ACPI_TYPE_ANY:
203                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
204                 case ACPI_TYPE_DEVICE:
205                 case ACPI_TYPE_POWER:
206                 case ACPI_TYPE_PROCESSOR:
207                 case ACPI_TYPE_THERMAL:
208
209                         /* These are acceptable types */
210                         break;
211
212                 case ACPI_TYPE_INTEGER:
213                 case ACPI_TYPE_STRING:
214                 case ACPI_TYPE_BUFFER:
215
216                         /*
217                          * These types we will allow, but we will change the type.
218                          * This enables some existing code of the form:
219                          *
220                          *  Name (DEB, 0)
221                          *  Scope (DEB) { ... }
222                          */
223                         ACPI_WARNING((AE_INFO,
224                                       "Type override - [%4.4s] had invalid type (%s) "
225                                       "for Scope operator, changed to type ANY\n",
226                                       acpi_ut_get_node_name(node),
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 "
239                                     "Scope operator [%4.4s] (Cannot override)",
240                                     acpi_ut_get_type_name(node->type),
241                                     acpi_ut_get_node_name(node)));
242
243                         return (AE_AML_OPERAND_TYPE);
244                 }
245                 break;
246
247         default:
248
249                 /* All other opcodes */
250
251                 if (op && op->common.node) {
252
253                         /* This op/node was previously entered into the namespace */
254
255                         node = op->common.node;
256
257                         if (acpi_ns_opens_scope(object_type)) {
258                                 status =
259                                     acpi_ds_scope_stack_push(node, object_type,
260                                                              walk_state);
261                                 if (ACPI_FAILURE(status)) {
262                                         return_ACPI_STATUS(status);
263                                 }
264                         }
265
266                         return_ACPI_STATUS(AE_OK);
267                 }
268
269                 /*
270                  * Enter the named type into the internal namespace. We enter the name
271                  * as we go downward in the parse tree. Any necessary subobjects that
272                  * involve arguments to the opcode must be created as we go back up the
273                  * parse tree later.
274                  *
275                  * Note: Name may already exist if we are executing a deferred opcode.
276                  */
277                 if (walk_state->deferred_node) {
278
279                         /* This name is already in the namespace, get the node */
280
281                         node = walk_state->deferred_node;
282                         status = AE_OK;
283                         break;
284                 }
285
286                 flags = ACPI_NS_NO_UPSEARCH;
287                 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
288
289                         /* Execution mode, node cannot already exist, node is temporary */
290
291                         flags |= ACPI_NS_ERROR_IF_FOUND;
292
293                         if (!
294                             (walk_state->
295                              parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
296                                 flags |= ACPI_NS_TEMPORARY;
297                         }
298                 }
299
300                 /* Add new entry or lookup existing entry */
301
302                 status =
303                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
304                                    object_type, ACPI_IMODE_LOAD_PASS2, flags,
305                                    walk_state, &node);
306
307                 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
308                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
309                                           "***New Node [%4.4s] %p is temporary\n",
310                                           acpi_ut_get_node_name(node), node));
311                 }
312                 break;
313         }
314
315         if (ACPI_FAILURE(status)) {
316                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
317                 return_ACPI_STATUS(status);
318         }
319
320         if (!op) {
321
322                 /* Create a new op */
323
324                 op = acpi_ps_alloc_op(walk_state->opcode);
325                 if (!op) {
326                         return_ACPI_STATUS(AE_NO_MEMORY);
327                 }
328
329                 /* Initialize the new op */
330
331                 if (node) {
332                         op->named.name = node->name.integer;
333                 }
334                 *out_op = op;
335         }
336
337         /*
338          * Put the Node in the "op" object that the parser uses, so we
339          * can get it again quickly when this scope is closed
340          */
341         op->common.node = node;
342         return_ACPI_STATUS(status);
343 }
344
345 /*******************************************************************************
346  *
347  * FUNCTION:    acpi_ds_load2_end_op
348  *
349  * PARAMETERS:  walk_state      - Current state of the parse tree walk
350  *
351  * RETURN:      Status
352  *
353  * DESCRIPTION: Ascending callback used during the loading of the namespace,
354  *              both control methods and everything else.
355  *
356  ******************************************************************************/
357
358 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
359 {
360         union acpi_parse_object *op;
361         acpi_status status = AE_OK;
362         acpi_object_type object_type;
363         struct acpi_namespace_node *node;
364         union acpi_parse_object *arg;
365         struct acpi_namespace_node *new_node;
366 #ifndef ACPI_NO_METHOD_EXECUTION
367         u32 i;
368         u8 region_space;
369 #endif
370
371         ACPI_FUNCTION_TRACE(ds_load2_end_op);
372
373         op = walk_state->op;
374         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
375                           walk_state->op_info->name, op, walk_state));
376
377         /* Check if opcode had an associated namespace object */
378
379         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
380                 return_ACPI_STATUS(AE_OK);
381         }
382
383         if (op->common.aml_opcode == AML_SCOPE_OP) {
384                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
385                                   "Ending scope Op=%p State=%p\n", op,
386                                   walk_state));
387         }
388
389         object_type = walk_state->op_info->object_type;
390
391         /*
392          * Get the Node/name from the earlier lookup
393          * (It was saved in the *op structure)
394          */
395         node = op->common.node;
396
397         /*
398          * Put the Node on the object stack (Contains the ACPI Name of
399          * this object)
400          */
401         walk_state->operands[0] = (void *)node;
402         walk_state->num_operands = 1;
403
404         /* Pop the scope stack */
405
406         if (acpi_ns_opens_scope(object_type) &&
407             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
408                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
409                                   "(%s) Popping scope for Op %p\n",
410                                   acpi_ut_get_type_name(object_type), op));
411
412                 status = acpi_ds_scope_stack_pop(walk_state);
413                 if (ACPI_FAILURE(status)) {
414                         goto cleanup;
415                 }
416         }
417
418         /*
419          * Named operations are as follows:
420          *
421          * AML_ALIAS
422          * AML_BANKFIELD
423          * AML_CREATEBITFIELD
424          * AML_CREATEBYTEFIELD
425          * AML_CREATEDWORDFIELD
426          * AML_CREATEFIELD
427          * AML_CREATEQWORDFIELD
428          * AML_CREATEWORDFIELD
429          * AML_DATA_REGION
430          * AML_DEVICE
431          * AML_EVENT
432          * AML_FIELD
433          * AML_INDEXFIELD
434          * AML_METHOD
435          * AML_METHODCALL
436          * AML_MUTEX
437          * AML_NAME
438          * AML_NAMEDFIELD
439          * AML_OPREGION
440          * AML_POWERRES
441          * AML_PROCESSOR
442          * AML_SCOPE
443          * AML_THERMALZONE
444          */
445
446         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
447                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
448                           acpi_ps_get_opcode_name(op->common.aml_opcode),
449                           walk_state, op, node));
450
451         /* Decode the opcode */
452
453         arg = op->common.value.arg;
454
455         switch (walk_state->op_info->type) {
456 #ifndef ACPI_NO_METHOD_EXECUTION
457
458         case AML_TYPE_CREATE_FIELD:
459                 /*
460                  * Create the field object, but the field buffer and index must
461                  * be evaluated later during the execution phase
462                  */
463                 status = acpi_ds_create_buffer_field(op, walk_state);
464                 break;
465
466         case AML_TYPE_NAMED_FIELD:
467                 /*
468                  * If we are executing a method, initialize the field
469                  */
470                 if (walk_state->method_node) {
471                         status = acpi_ds_init_field_objects(op, walk_state);
472                 }
473
474                 switch (op->common.aml_opcode) {
475                 case AML_INDEX_FIELD_OP:
476
477                         status =
478                             acpi_ds_create_index_field(op,
479                                                        (acpi_handle) arg->
480                                                        common.node, walk_state);
481                         break;
482
483                 case AML_BANK_FIELD_OP:
484
485                         status =
486                             acpi_ds_create_bank_field(op, arg->common.node,
487                                                       walk_state);
488                         break;
489
490                 case AML_FIELD_OP:
491
492                         status =
493                             acpi_ds_create_field(op, arg->common.node,
494                                                  walk_state);
495                         break;
496
497                 default:
498                         /* All NAMED_FIELD opcodes must be handled above */
499                         break;
500                 }
501                 break;
502
503         case AML_TYPE_NAMED_SIMPLE:
504
505                 status = acpi_ds_create_operands(walk_state, arg);
506                 if (ACPI_FAILURE(status)) {
507                         goto cleanup;
508                 }
509
510                 switch (op->common.aml_opcode) {
511                 case AML_PROCESSOR_OP:
512
513                         status = acpi_ex_create_processor(walk_state);
514                         break;
515
516                 case AML_POWER_RES_OP:
517
518                         status = acpi_ex_create_power_resource(walk_state);
519                         break;
520
521                 case AML_MUTEX_OP:
522
523                         status = acpi_ex_create_mutex(walk_state);
524                         break;
525
526                 case AML_EVENT_OP:
527
528                         status = acpi_ex_create_event(walk_state);
529                         break;
530
531                 case AML_ALIAS_OP:
532
533                         status = acpi_ex_create_alias(walk_state);
534                         break;
535
536                 default:
537                         /* Unknown opcode */
538
539                         status = AE_OK;
540                         goto cleanup;
541                 }
542
543                 /* Delete operands */
544
545                 for (i = 1; i < walk_state->num_operands; i++) {
546                         acpi_ut_remove_reference(walk_state->operands[i]);
547                         walk_state->operands[i] = NULL;
548                 }
549
550                 break;
551 #endif                          /* ACPI_NO_METHOD_EXECUTION */
552
553         case AML_TYPE_NAMED_COMPLEX:
554
555                 switch (op->common.aml_opcode) {
556 #ifndef ACPI_NO_METHOD_EXECUTION
557                 case AML_REGION_OP:
558                 case AML_DATA_REGION_OP:
559
560                         if (op->common.aml_opcode == AML_REGION_OP) {
561                                 region_space = (acpi_adr_space_type)
562                                     ((op->common.value.arg)->common.value.
563                                      integer);
564                         } else {
565                                 region_space = ACPI_ADR_SPACE_DATA_TABLE;
566                         }
567
568                         /*
569                          * The op_region is not fully parsed at this time. The only valid
570                          * argument is the space_id. (We must save the address of the
571                          * AML of the address and length operands)
572                          *
573                          * If we have a valid region, initialize it. The namespace is
574                          * unlocked at this point.
575                          *
576                          * Need to unlock interpreter if it is locked (if we are running
577                          * a control method), in order to allow _REG methods to be run
578                          * during acpi_ev_initialize_region.
579                          */
580                         if (walk_state->method_node) {
581                                 /*
582                                  * Executing a method: initialize the region and unlock
583                                  * the interpreter
584                                  */
585                                 status =
586                                     acpi_ex_create_region(op->named.data,
587                                                           op->named.length,
588                                                           region_space,
589                                                           walk_state);
590                                 if (ACPI_FAILURE(status)) {
591                                         return (status);
592                                 }
593
594                                 acpi_ex_exit_interpreter();
595                         }
596
597                         status =
598                             acpi_ev_initialize_region
599                             (acpi_ns_get_attached_object(node), FALSE);
600                         if (walk_state->method_node) {
601                                 acpi_ex_enter_interpreter();
602                         }
603
604                         if (ACPI_FAILURE(status)) {
605                                 /*
606                                  *  If AE_NOT_EXIST is returned, it is not fatal
607                                  *  because many regions get created before a handler
608                                  *  is installed for said region.
609                                  */
610                                 if (AE_NOT_EXIST == status) {
611                                         status = AE_OK;
612                                 }
613                         }
614                         break;
615
616                 case AML_NAME_OP:
617
618                         status = acpi_ds_create_node(walk_state, node, op);
619                         break;
620
621                 case AML_METHOD_OP:
622                         /*
623                          * method_op pkg_length name_string method_flags term_list
624                          *
625                          * Note: We must create the method node/object pair as soon as we
626                          * see the method declaration. This allows later pass1 parsing
627                          * of invocations of the method (need to know the number of
628                          * arguments.)
629                          */
630                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
631                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
632                                           walk_state, op, op->named.node));
633
634                         if (!acpi_ns_get_attached_object(op->named.node)) {
635                                 walk_state->operands[0] =
636                                     ACPI_CAST_PTR(void, op->named.node);
637                                 walk_state->num_operands = 1;
638
639                                 status =
640                                     acpi_ds_create_operands(walk_state,
641                                                             op->common.value.
642                                                             arg);
643                                 if (ACPI_SUCCESS(status)) {
644                                         status =
645                                             acpi_ex_create_method(op->named.
646                                                                   data,
647                                                                   op->named.
648                                                                   length,
649                                                                   walk_state);
650                                 }
651                                 walk_state->operands[0] = NULL;
652                                 walk_state->num_operands = 0;
653
654                                 if (ACPI_FAILURE(status)) {
655                                         return_ACPI_STATUS(status);
656                                 }
657                         }
658                         break;
659
660 #endif                          /* ACPI_NO_METHOD_EXECUTION */
661
662                 default:
663                         /* All NAMED_COMPLEX opcodes must be handled above */
664                         break;
665                 }
666                 break;
667
668         case AML_CLASS_INTERNAL:
669
670                 /* case AML_INT_NAMEPATH_OP: */
671                 break;
672
673         case AML_CLASS_METHOD_CALL:
674
675                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
676                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
677                                   walk_state, op, node));
678
679                 /*
680                  * Lookup the method name and save the Node
681                  */
682                 status =
683                     acpi_ns_lookup(walk_state->scope_info,
684                                    arg->common.value.string, ACPI_TYPE_ANY,
685                                    ACPI_IMODE_LOAD_PASS2,
686                                    ACPI_NS_SEARCH_PARENT |
687                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
688                                    &(new_node));
689                 if (ACPI_SUCCESS(status)) {
690                         /*
691                          * Make sure that what we found is indeed a method
692                          * We didn't search for a method on purpose, to see if the name
693                          * would resolve
694                          */
695                         if (new_node->type != ACPI_TYPE_METHOD) {
696                                 status = AE_AML_OPERAND_TYPE;
697                         }
698
699                         /* We could put the returned object (Node) on the object stack for
700                          * later, but for now, we will put it in the "op" object that the
701                          * parser uses, so we can get it again at the end of this scope
702                          */
703                         op->common.node = new_node;
704                 } else {
705                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
706                 }
707                 break;
708
709         default:
710                 break;
711         }
712
713       cleanup:
714
715         /* Remove the Node pushed at the very beginning */
716
717         walk_state->operands[0] = NULL;
718         walk_state->num_operands = 0;
719         return_ACPI_STATUS(status);
720 }