Pull bay into test branch
[linux-2.6] / drivers / acpi / dispatcher / dswload.c
1 /******************************************************************************
2  *
3  * Module Name: dswload - Dispatcher namespace load callbacks
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2007, R. Byron Moore
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 <acpi/acparser.h>
46 #include <acpi/amlcode.h>
47 #include <acpi/acdispat.h>
48 #include <acpi/acinterp.h>
49 #include <acpi/acnamesp.h>
50 #include <acpi/acevents.h>
51
52 #ifdef ACPI_ASL_COMPILER
53 #include <acpi/acdisasm.h>
54 #endif
55
56 #define _COMPONENT          ACPI_DISPATCHER
57 ACPI_MODULE_NAME("dswload")
58
59 /*******************************************************************************
60  *
61  * FUNCTION:    acpi_ds_init_callbacks
62  *
63  * PARAMETERS:  walk_state      - Current state of the parse tree walk
64  *              pass_number     - 1, 2, or 3
65  *
66  * RETURN:      Status
67  *
68  * DESCRIPTION: Init walk state callbacks
69  *
70  ******************************************************************************/
71 acpi_status
72 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
73 {
74
75         switch (pass_number) {
76         case 1:
77                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
78                     ACPI_PARSE_DELETE_TREE;
79                 walk_state->descending_callback = acpi_ds_load1_begin_op;
80                 walk_state->ascending_callback = acpi_ds_load1_end_op;
81                 break;
82
83         case 2:
84                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
85                     ACPI_PARSE_DELETE_TREE;
86                 walk_state->descending_callback = acpi_ds_load2_begin_op;
87                 walk_state->ascending_callback = acpi_ds_load2_end_op;
88                 break;
89
90         case 3:
91 #ifndef ACPI_NO_METHOD_EXECUTION
92                 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
93                     ACPI_PARSE_DELETE_TREE;
94                 walk_state->descending_callback = acpi_ds_exec_begin_op;
95                 walk_state->ascending_callback = acpi_ds_exec_end_op;
96 #endif
97                 break;
98
99         default:
100                 return (AE_BAD_PARAMETER);
101         }
102
103         return (AE_OK);
104 }
105
106 /*******************************************************************************
107  *
108  * FUNCTION:    acpi_ds_load1_begin_op
109  *
110  * PARAMETERS:  walk_state      - Current state of the parse tree walk
111  *              out_op          - Where to return op if a new one is created
112  *
113  * RETURN:      Status
114  *
115  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
116  *
117  ******************************************************************************/
118
119 acpi_status
120 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
121                        union acpi_parse_object ** out_op)
122 {
123         union acpi_parse_object *op;
124         struct acpi_namespace_node *node;
125         acpi_status status;
126         acpi_object_type object_type;
127         char *path;
128         u32 flags;
129
130         ACPI_FUNCTION_TRACE(ds_load1_begin_op);
131
132         op = walk_state->op;
133         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
134                           walk_state));
135
136         /* We are only interested in opcodes that have an associated name */
137
138         if (op) {
139                 if (!(walk_state->op_info->flags & AML_NAMED)) {
140                         *out_op = op;
141                         return_ACPI_STATUS(AE_OK);
142                 }
143
144                 /* Check if this object has already been installed in the namespace */
145
146                 if (op->common.node) {
147                         *out_op = op;
148                         return_ACPI_STATUS(AE_OK);
149                 }
150         }
151
152         path = acpi_ps_get_next_namestring(&walk_state->parser_state);
153
154         /* Map the raw opcode into an internal object type */
155
156         object_type = walk_state->op_info->object_type;
157
158         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
159                           "State=%p Op=%p [%s]\n", walk_state, op,
160                           acpi_ut_get_type_name(object_type)));
161
162         switch (walk_state->opcode) {
163         case AML_SCOPE_OP:
164
165                 /*
166                  * The target name of the Scope() operator must exist at this point so
167                  * that we can actually open the scope to enter new names underneath it.
168                  * Allow search-to-root for single namesegs.
169                  */
170                 status =
171                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
172                                    ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
173                                    walk_state, &(node));
174 #ifdef ACPI_ASL_COMPILER
175                 if (status == AE_NOT_FOUND) {
176                         /*
177                          * Table disassembly:
178                          * Target of Scope() not found. Generate an External for it, and
179                          * insert the name into the namespace.
180                          */
181                         acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
182                         status =
183                             acpi_ns_lookup(walk_state->scope_info, path,
184                                            object_type, ACPI_IMODE_LOAD_PASS1,
185                                            ACPI_NS_SEARCH_PARENT, walk_state,
186                                            &node);
187                 }
188 #endif
189                 if (ACPI_FAILURE(status)) {
190                         ACPI_ERROR_NAMESPACE(path, status);
191                         return_ACPI_STATUS(status);
192                 }
193
194                 /*
195                  * Check to make sure that the target is
196                  * one of the opcodes that actually opens a scope
197                  */
198                 switch (node->type) {
199                 case ACPI_TYPE_ANY:
200                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope  */
201                 case ACPI_TYPE_DEVICE:
202                 case ACPI_TYPE_POWER:
203                 case ACPI_TYPE_PROCESSOR:
204                 case ACPI_TYPE_THERMAL:
205
206                         /* These are acceptable types */
207                         break;
208
209                 case ACPI_TYPE_INTEGER:
210                 case ACPI_TYPE_STRING:
211                 case ACPI_TYPE_BUFFER:
212
213                         /*
214                          * These types we will allow, but we will change the type. This
215                          * enables some existing code of the form:
216                          *
217                          *  Name (DEB, 0)
218                          *  Scope (DEB) { ... }
219                          *
220                          * Note: silently change the type here. On the second pass, we will report
221                          * a warning
222                          */
223                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
224                                           "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
225                                           path,
226                                           acpi_ut_get_type_name(node->type)));
227
228                         node->type = ACPI_TYPE_ANY;
229                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
230                         break;
231
232                 default:
233
234                         /* All other types are an error */
235
236                         ACPI_ERROR((AE_INFO,
237                                     "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
238                                     acpi_ut_get_type_name(node->type), path));
239
240                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
241                 }
242                 break;
243
244         default:
245                 /*
246                  * For all other named opcodes, we will enter the name into
247                  * the namespace.
248                  *
249                  * Setup the search flags.
250                  * Since we are entering a name into the namespace, we do not want to
251                  * enable the search-to-root upsearch.
252                  *
253                  * There are only two conditions where it is acceptable that the name
254                  * already exists:
255                  *    1) the Scope() operator can reopen a scoping object that was
256                  *       previously defined (Scope, Method, Device, etc.)
257                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
258                  *       buffer_field, or Package), the name of the object is already
259                  *       in the namespace.
260                  */
261                 if (walk_state->deferred_node) {
262
263                         /* This name is already in the namespace, get the node */
264
265                         node = walk_state->deferred_node;
266                         status = AE_OK;
267                         break;
268                 }
269
270                 /*
271                  * If we are executing a method, do not create any namespace objects
272                  * during the load phase, only during execution.
273                  */
274                 if (walk_state->method_node) {
275                         node = NULL;
276                         status = AE_OK;
277                         break;
278                 }
279
280                 flags = ACPI_NS_NO_UPSEARCH;
281                 if ((walk_state->opcode != AML_SCOPE_OP) &&
282                     (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
283                         flags |= ACPI_NS_ERROR_IF_FOUND;
284                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
285                                           "[%s] Cannot already exist\n",
286                                           acpi_ut_get_type_name(object_type)));
287                 } else {
288                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
289                                           "[%s] Both Find or Create allowed\n",
290                                           acpi_ut_get_type_name(object_type)));
291                 }
292
293                 /*
294                  * Enter the named type into the internal namespace. We enter the name
295                  * as we go downward in the parse tree. Any necessary subobjects that
296                  * involve arguments to the opcode must be created as we go back up the
297                  * parse tree later.
298                  */
299                 status =
300                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
301                                    ACPI_IMODE_LOAD_PASS1, flags, walk_state,
302                                    &node);
303                 if (ACPI_FAILURE(status)) {
304                         if (status == AE_ALREADY_EXISTS) {
305
306                                 /* The name already exists in this scope */
307
308                                 if (node->flags & ANOBJ_IS_EXTERNAL) {
309                                         /*
310                                          * Allow one create on an object or segment that was
311                                          * previously declared External
312                                          */
313                                         node->flags &= ~ANOBJ_IS_EXTERNAL;
314                                         node->type = (u8) object_type;
315
316                                         /* Just retyped a node, probably will need to open a scope */
317
318                                         if (acpi_ns_opens_scope(object_type)) {
319                                                 status =
320                                                     acpi_ds_scope_stack_push
321                                                     (node, object_type,
322                                                      walk_state);
323                                                 if (ACPI_FAILURE(status)) {
324                                                         return_ACPI_STATUS
325                                                             (status);
326                                                 }
327                                         }
328
329                                         status = AE_OK;
330                                 }
331                         }
332
333                         if (ACPI_FAILURE(status)) {
334                                 ACPI_ERROR_NAMESPACE(path, status);
335                                 return_ACPI_STATUS(status);
336                         }
337                 }
338                 break;
339         }
340
341         /* Common exit */
342
343         if (!op) {
344
345                 /* Create a new op */
346
347                 op = acpi_ps_alloc_op(walk_state->opcode);
348                 if (!op) {
349                         return_ACPI_STATUS(AE_NO_MEMORY);
350                 }
351         }
352
353         /* Initialize the op */
354
355 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
356         op->named.path = ACPI_CAST_PTR(u8, path);
357 #endif
358
359         if (node) {
360                 /*
361                  * Put the Node in the "op" object that the parser uses, so we
362                  * can get it again quickly when this scope is closed
363                  */
364                 op->common.node = node;
365                 op->named.name = node->name.integer;
366         }
367
368         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
369                            op);
370         *out_op = op;
371         return_ACPI_STATUS(status);
372 }
373
374 /*******************************************************************************
375  *
376  * FUNCTION:    acpi_ds_load1_end_op
377  *
378  * PARAMETERS:  walk_state      - Current state of the parse tree walk
379  *
380  * RETURN:      Status
381  *
382  * DESCRIPTION: Ascending callback used during the loading of the namespace,
383  *              both control methods and everything else.
384  *
385  ******************************************************************************/
386
387 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
388 {
389         union acpi_parse_object *op;
390         acpi_object_type object_type;
391         acpi_status status = AE_OK;
392
393         ACPI_FUNCTION_TRACE(ds_load1_end_op);
394
395         op = walk_state->op;
396         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
397                           walk_state));
398
399         /* We are only interested in opcodes that have an associated name */
400
401         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
402                 return_ACPI_STATUS(AE_OK);
403         }
404
405         /* Get the object type to determine if we should pop the scope */
406
407         object_type = walk_state->op_info->object_type;
408
409 #ifndef ACPI_NO_METHOD_EXECUTION
410         if (walk_state->op_info->flags & AML_FIELD) {
411                 /*
412                  * If we are executing a method, do not create any namespace objects
413                  * during the load phase, only during execution.
414                  */
415                 if (!walk_state->method_node) {
416                         if (walk_state->opcode == AML_FIELD_OP ||
417                             walk_state->opcode == AML_BANK_FIELD_OP ||
418                             walk_state->opcode == AML_INDEX_FIELD_OP) {
419                                 status =
420                                     acpi_ds_init_field_objects(op, walk_state);
421                         }
422                 }
423                 return_ACPI_STATUS(status);
424         }
425
426         /*
427          * If we are executing a method, do not create any namespace objects
428          * during the load phase, only during execution.
429          */
430         if (!walk_state->method_node) {
431                 if (op->common.aml_opcode == AML_REGION_OP) {
432                         status =
433                             acpi_ex_create_region(op->named.data,
434                                                   op->named.length,
435                                                   (acpi_adr_space_type) ((op->
436                                                                           common.
437                                                                           value.
438                                                                           arg)->
439                                                                          common.
440                                                                          value.
441                                                                          integer),
442                                                   walk_state);
443                         if (ACPI_FAILURE(status)) {
444                                 return_ACPI_STATUS(status);
445                         }
446                 }
447         }
448 #endif
449
450         if (op->common.aml_opcode == AML_NAME_OP) {
451
452                 /* For Name opcode, get the object type from the argument */
453
454                 if (op->common.value.arg) {
455                         object_type = (acpi_ps_get_opcode_info((op->common.
456                                                                 value.arg)->
457                                                                common.
458                                                                aml_opcode))->
459                             object_type;
460
461                         /* Set node type if we have a namespace node */
462
463                         if (op->common.node) {
464                                 op->common.node->type = (u8) object_type;
465                         }
466                 }
467         }
468
469         /*
470          * If we are executing a method, do not create any namespace objects
471          * during the load phase, only during execution.
472          */
473         if (!walk_state->method_node) {
474                 if (op->common.aml_opcode == AML_METHOD_OP) {
475                         /*
476                          * method_op pkg_length name_string method_flags term_list
477                          *
478                          * Note: We must create the method node/object pair as soon as we
479                          * see the method declaration. This allows later pass1 parsing
480                          * of invocations of the method (need to know the number of
481                          * arguments.)
482                          */
483                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
484                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
485                                           walk_state, op, op->named.node));
486
487                         if (!acpi_ns_get_attached_object(op->named.node)) {
488                                 walk_state->operands[0] =
489                                     ACPI_CAST_PTR(void, op->named.node);
490                                 walk_state->num_operands = 1;
491
492                                 status =
493                                     acpi_ds_create_operands(walk_state,
494                                                             op->common.value.
495                                                             arg);
496                                 if (ACPI_SUCCESS(status)) {
497                                         status =
498                                             acpi_ex_create_method(op->named.
499                                                                   data,
500                                                                   op->named.
501                                                                   length,
502                                                                   walk_state);
503                                 }
504
505                                 walk_state->operands[0] = NULL;
506                                 walk_state->num_operands = 0;
507
508                                 if (ACPI_FAILURE(status)) {
509                                         return_ACPI_STATUS(status);
510                                 }
511                         }
512                 }
513         }
514
515         /* Pop the scope stack (only if loading a table) */
516
517         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
518                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
519                                   "(%s): Popping scope for Op %p\n",
520                                   acpi_ut_get_type_name(object_type), op));
521
522                 status = acpi_ds_scope_stack_pop(walk_state);
523         }
524
525         return_ACPI_STATUS(status);
526 }
527
528 /*******************************************************************************
529  *
530  * FUNCTION:    acpi_ds_load2_begin_op
531  *
532  * PARAMETERS:  walk_state      - Current state of the parse tree walk
533  *              out_op          - Wher to return op if a new one is created
534  *
535  * RETURN:      Status
536  *
537  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
538  *
539  ******************************************************************************/
540
541 acpi_status
542 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
543                        union acpi_parse_object **out_op)
544 {
545         union acpi_parse_object *op;
546         struct acpi_namespace_node *node;
547         acpi_status status;
548         acpi_object_type object_type;
549         char *buffer_ptr;
550         u32 flags;
551
552         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
553
554         op = walk_state->op;
555         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
556                           walk_state));
557
558         if (op) {
559                 if ((walk_state->control_state) &&
560                     (walk_state->control_state->common.state ==
561                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
562
563                         /* We are executing a while loop outside of a method */
564
565                         status = acpi_ds_exec_begin_op(walk_state, out_op);
566                         return_ACPI_STATUS(status);
567                 }
568
569                 /* We only care about Namespace opcodes here */
570
571                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
572                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
573                     (!(walk_state->op_info->flags & AML_NAMED))) {
574 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
575                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
576                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
577                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
578                                                   "Begin/EXEC: %s (fl %8.8X)\n",
579                                                   walk_state->op_info->name,
580                                                   walk_state->op_info->flags));
581
582                                 /* Executing a type1 or type2 opcode outside of a method */
583
584                                 status =
585                                     acpi_ds_exec_begin_op(walk_state, out_op);
586                                 return_ACPI_STATUS(status);
587                         }
588 #endif
589                         return_ACPI_STATUS(AE_OK);
590                 }
591
592                 /* Get the name we are going to enter or lookup in the namespace */
593
594                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
595
596                         /* For Namepath op, get the path string */
597
598                         buffer_ptr = op->common.value.string;
599                         if (!buffer_ptr) {
600
601                                 /* No name, just exit */
602
603                                 return_ACPI_STATUS(AE_OK);
604                         }
605                 } else {
606                         /* Get name from the op */
607
608                         buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
609                 }
610         } else {
611                 /* Get the namestring from the raw AML */
612
613                 buffer_ptr =
614                     acpi_ps_get_next_namestring(&walk_state->parser_state);
615         }
616
617         /* Map the opcode into an internal object type */
618
619         object_type = walk_state->op_info->object_type;
620
621         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
622                           "State=%p Op=%p Type=%X\n", walk_state, op,
623                           object_type));
624
625         switch (walk_state->opcode) {
626         case AML_FIELD_OP:
627         case AML_BANK_FIELD_OP:
628         case AML_INDEX_FIELD_OP:
629
630                 node = NULL;
631                 status = AE_OK;
632                 break;
633
634         case AML_INT_NAMEPATH_OP:
635                 /*
636                  * The name_path is an object reference to an existing object.
637                  * Don't enter the name into the namespace, but look it up
638                  * for use later.
639                  */
640                 status =
641                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
642                                    object_type, ACPI_IMODE_EXECUTE,
643                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
644                 break;
645
646         case AML_SCOPE_OP:
647                 /*
648                  * The Path is an object reference to an existing object.
649                  * Don't enter the name into the namespace, but look it up
650                  * for use later.
651                  */
652                 status =
653                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
654                                    object_type, ACPI_IMODE_EXECUTE,
655                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
656                 if (ACPI_FAILURE(status)) {
657 #ifdef ACPI_ASL_COMPILER
658                         if (status == AE_NOT_FOUND) {
659                                 status = AE_OK;
660                         } else {
661                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
662                         }
663 #else
664                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
665 #endif
666                         return_ACPI_STATUS(status);
667                 }
668
669                 /*
670                  * We must check to make sure that the target is
671                  * one of the opcodes that actually opens a scope
672                  */
673                 switch (node->type) {
674                 case ACPI_TYPE_ANY:
675                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
676                 case ACPI_TYPE_DEVICE:
677                 case ACPI_TYPE_POWER:
678                 case ACPI_TYPE_PROCESSOR:
679                 case ACPI_TYPE_THERMAL:
680
681                         /* These are acceptable types */
682                         break;
683
684                 case ACPI_TYPE_INTEGER:
685                 case ACPI_TYPE_STRING:
686                 case ACPI_TYPE_BUFFER:
687
688                         /*
689                          * These types we will allow, but we will change the type. This
690                          * enables some existing code of the form:
691                          *
692                          *  Name (DEB, 0)
693                          *  Scope (DEB) { ... }
694                          */
695                         ACPI_WARNING((AE_INFO,
696                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
697                                       buffer_ptr,
698                                       acpi_ut_get_type_name(node->type)));
699
700                         node->type = ACPI_TYPE_ANY;
701                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
702                         break;
703
704                 default:
705
706                         /* All other types are an error */
707
708                         ACPI_ERROR((AE_INFO,
709                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
710                                     acpi_ut_get_type_name(node->type),
711                                     buffer_ptr));
712
713                         return (AE_AML_OPERAND_TYPE);
714                 }
715                 break;
716
717         default:
718
719                 /* All other opcodes */
720
721                 if (op && op->common.node) {
722
723                         /* This op/node was previously entered into the namespace */
724
725                         node = op->common.node;
726
727                         if (acpi_ns_opens_scope(object_type)) {
728                                 status =
729                                     acpi_ds_scope_stack_push(node, object_type,
730                                                              walk_state);
731                                 if (ACPI_FAILURE(status)) {
732                                         return_ACPI_STATUS(status);
733                                 }
734                         }
735
736                         return_ACPI_STATUS(AE_OK);
737                 }
738
739                 /*
740                  * Enter the named type into the internal namespace. We enter the name
741                  * as we go downward in the parse tree. Any necessary subobjects that
742                  * involve arguments to the opcode must be created as we go back up the
743                  * parse tree later.
744                  *
745                  * Note: Name may already exist if we are executing a deferred opcode.
746                  */
747                 if (walk_state->deferred_node) {
748
749                         /* This name is already in the namespace, get the node */
750
751                         node = walk_state->deferred_node;
752                         status = AE_OK;
753                         break;
754                 }
755
756                 flags = ACPI_NS_NO_UPSEARCH;
757                 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
758
759                         /* Execution mode, node cannot already exist, node is temporary */
760
761                         flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
762                 }
763
764                 /* Add new entry or lookup existing entry */
765
766                 status =
767                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
768                                    object_type, ACPI_IMODE_LOAD_PASS2, flags,
769                                    walk_state, &node);
770                 break;
771         }
772
773         if (ACPI_FAILURE(status)) {
774                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
775                 return_ACPI_STATUS(status);
776         }
777
778         if (!op) {
779
780                 /* Create a new op */
781
782                 op = acpi_ps_alloc_op(walk_state->opcode);
783                 if (!op) {
784                         return_ACPI_STATUS(AE_NO_MEMORY);
785                 }
786
787                 /* Initialize the new op */
788
789                 if (node) {
790                         op->named.name = node->name.integer;
791                 }
792                 *out_op = op;
793         }
794
795         /*
796          * Put the Node in the "op" object that the parser uses, so we
797          * can get it again quickly when this scope is closed
798          */
799         op->common.node = node;
800         return_ACPI_STATUS(status);
801 }
802
803 /*******************************************************************************
804  *
805  * FUNCTION:    acpi_ds_load2_end_op
806  *
807  * PARAMETERS:  walk_state      - Current state of the parse tree walk
808  *
809  * RETURN:      Status
810  *
811  * DESCRIPTION: Ascending callback used during the loading of the namespace,
812  *              both control methods and everything else.
813  *
814  ******************************************************************************/
815
816 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
817 {
818         union acpi_parse_object *op;
819         acpi_status status = AE_OK;
820         acpi_object_type object_type;
821         struct acpi_namespace_node *node;
822         union acpi_parse_object *arg;
823         struct acpi_namespace_node *new_node;
824 #ifndef ACPI_NO_METHOD_EXECUTION
825         u32 i;
826 #endif
827
828         ACPI_FUNCTION_TRACE(ds_load2_end_op);
829
830         op = walk_state->op;
831         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
832                           walk_state->op_info->name, op, walk_state));
833
834         /* Check if opcode had an associated namespace object */
835
836         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
837 #ifndef ACPI_NO_METHOD_EXECUTION
838 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
839                 /* No namespace object. Executable opcode? */
840
841                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
842                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
843                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
844                                           "End/EXEC:   %s (fl %8.8X)\n",
845                                           walk_state->op_info->name,
846                                           walk_state->op_info->flags));
847
848                         /* Executing a type1 or type2 opcode outside of a method */
849
850                         status = acpi_ds_exec_end_op(walk_state);
851                         return_ACPI_STATUS(status);
852                 }
853 #endif
854 #endif
855                 return_ACPI_STATUS(AE_OK);
856         }
857
858         if (op->common.aml_opcode == AML_SCOPE_OP) {
859                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
860                                   "Ending scope Op=%p State=%p\n", op,
861                                   walk_state));
862         }
863
864         object_type = walk_state->op_info->object_type;
865
866         /*
867          * Get the Node/name from the earlier lookup
868          * (It was saved in the *op structure)
869          */
870         node = op->common.node;
871
872         /*
873          * Put the Node on the object stack (Contains the ACPI Name of
874          * this object)
875          */
876         walk_state->operands[0] = (void *)node;
877         walk_state->num_operands = 1;
878
879         /* Pop the scope stack */
880
881         if (acpi_ns_opens_scope(object_type) &&
882             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
883                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
884                                   "(%s) Popping scope for Op %p\n",
885                                   acpi_ut_get_type_name(object_type), op));
886
887                 status = acpi_ds_scope_stack_pop(walk_state);
888                 if (ACPI_FAILURE(status)) {
889                         goto cleanup;
890                 }
891         }
892
893         /*
894          * Named operations are as follows:
895          *
896          * AML_ALIAS
897          * AML_BANKFIELD
898          * AML_CREATEBITFIELD
899          * AML_CREATEBYTEFIELD
900          * AML_CREATEDWORDFIELD
901          * AML_CREATEFIELD
902          * AML_CREATEQWORDFIELD
903          * AML_CREATEWORDFIELD
904          * AML_DATA_REGION
905          * AML_DEVICE
906          * AML_EVENT
907          * AML_FIELD
908          * AML_INDEXFIELD
909          * AML_METHOD
910          * AML_METHODCALL
911          * AML_MUTEX
912          * AML_NAME
913          * AML_NAMEDFIELD
914          * AML_OPREGION
915          * AML_POWERRES
916          * AML_PROCESSOR
917          * AML_SCOPE
918          * AML_THERMALZONE
919          */
920
921         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
922                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
923                           acpi_ps_get_opcode_name(op->common.aml_opcode),
924                           walk_state, op, node));
925
926         /* Decode the opcode */
927
928         arg = op->common.value.arg;
929
930         switch (walk_state->op_info->type) {
931 #ifndef ACPI_NO_METHOD_EXECUTION
932
933         case AML_TYPE_CREATE_FIELD:
934                 /*
935                  * Create the field object, but the field buffer and index must
936                  * be evaluated later during the execution phase
937                  */
938                 status = acpi_ds_create_buffer_field(op, walk_state);
939                 break;
940
941         case AML_TYPE_NAMED_FIELD:
942                 /*
943                  * If we are executing a method, initialize the field
944                  */
945                 if (walk_state->method_node) {
946                         status = acpi_ds_init_field_objects(op, walk_state);
947                 }
948
949                 switch (op->common.aml_opcode) {
950                 case AML_INDEX_FIELD_OP:
951
952                         status =
953                             acpi_ds_create_index_field(op,
954                                                        (acpi_handle) arg->
955                                                        common.node, walk_state);
956                         break;
957
958                 case AML_BANK_FIELD_OP:
959
960                         status =
961                             acpi_ds_create_bank_field(op, arg->common.node,
962                                                       walk_state);
963                         break;
964
965                 case AML_FIELD_OP:
966
967                         status =
968                             acpi_ds_create_field(op, arg->common.node,
969                                                  walk_state);
970                         break;
971
972                 default:
973                         /* All NAMED_FIELD opcodes must be handled above */
974                         break;
975                 }
976                 break;
977
978         case AML_TYPE_NAMED_SIMPLE:
979
980                 status = acpi_ds_create_operands(walk_state, arg);
981                 if (ACPI_FAILURE(status)) {
982                         goto cleanup;
983                 }
984
985                 switch (op->common.aml_opcode) {
986                 case AML_PROCESSOR_OP:
987
988                         status = acpi_ex_create_processor(walk_state);
989                         break;
990
991                 case AML_POWER_RES_OP:
992
993                         status = acpi_ex_create_power_resource(walk_state);
994                         break;
995
996                 case AML_MUTEX_OP:
997
998                         status = acpi_ex_create_mutex(walk_state);
999                         break;
1000
1001                 case AML_EVENT_OP:
1002
1003                         status = acpi_ex_create_event(walk_state);
1004                         break;
1005
1006                 case AML_DATA_REGION_OP:
1007
1008                         status = acpi_ex_create_table_region(walk_state);
1009                         break;
1010
1011                 case AML_ALIAS_OP:
1012
1013                         status = acpi_ex_create_alias(walk_state);
1014                         break;
1015
1016                 default:
1017                         /* Unknown opcode */
1018
1019                         status = AE_OK;
1020                         goto cleanup;
1021                 }
1022
1023                 /* Delete operands */
1024
1025                 for (i = 1; i < walk_state->num_operands; i++) {
1026                         acpi_ut_remove_reference(walk_state->operands[i]);
1027                         walk_state->operands[i] = NULL;
1028                 }
1029
1030                 break;
1031 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1032
1033         case AML_TYPE_NAMED_COMPLEX:
1034
1035                 switch (op->common.aml_opcode) {
1036 #ifndef ACPI_NO_METHOD_EXECUTION
1037                 case AML_REGION_OP:
1038
1039                         /*
1040                          * If we are executing a method, initialize the region
1041                          */
1042                         if (walk_state->method_node) {
1043                                 status =
1044                                     acpi_ex_create_region(op->named.data,
1045                                                           op->named.length,
1046                                                           (acpi_adr_space_type)
1047                                                           ((op->common.value.
1048                                                             arg)->common.value.
1049                                                            integer),
1050                                                           walk_state);
1051                                 if (ACPI_FAILURE(status)) {
1052                                         return (status);
1053                                 }
1054                         }
1055
1056                         /*
1057                          * The op_region is not fully parsed at this time. Only valid
1058                          * argument is the space_id. (We must save the address of the
1059                          * AML of the address and length operands)
1060                          */
1061
1062                         /*
1063                          * If we have a valid region, initialize it
1064                          * Namespace is NOT locked at this point.
1065                          */
1066                         status =
1067                             acpi_ev_initialize_region
1068                             (acpi_ns_get_attached_object(node), FALSE);
1069                         if (ACPI_FAILURE(status)) {
1070                                 /*
1071                                  *  If AE_NOT_EXIST is returned, it is not fatal
1072                                  *  because many regions get created before a handler
1073                                  *  is installed for said region.
1074                                  */
1075                                 if (AE_NOT_EXIST == status) {
1076                                         status = AE_OK;
1077                                 }
1078                         }
1079                         break;
1080
1081                 case AML_NAME_OP:
1082
1083                         status = acpi_ds_create_node(walk_state, node, op);
1084                         break;
1085
1086                 case AML_METHOD_OP:
1087                         /*
1088                          * method_op pkg_length name_string method_flags term_list
1089                          *
1090                          * Note: We must create the method node/object pair as soon as we
1091                          * see the method declaration. This allows later pass1 parsing
1092                          * of invocations of the method (need to know the number of
1093                          * arguments.)
1094                          */
1095                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1096                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1097                                           walk_state, op, op->named.node));
1098
1099                         if (!acpi_ns_get_attached_object(op->named.node)) {
1100                                 walk_state->operands[0] =
1101                                     ACPI_CAST_PTR(void, op->named.node);
1102                                 walk_state->num_operands = 1;
1103
1104                                 status =
1105                                     acpi_ds_create_operands(walk_state,
1106                                                             op->common.value.
1107                                                             arg);
1108                                 if (ACPI_SUCCESS(status)) {
1109                                         status =
1110                                             acpi_ex_create_method(op->named.
1111                                                                   data,
1112                                                                   op->named.
1113                                                                   length,
1114                                                                   walk_state);
1115                                 }
1116                                 walk_state->operands[0] = NULL;
1117                                 walk_state->num_operands = 0;
1118
1119                                 if (ACPI_FAILURE(status)) {
1120                                         return_ACPI_STATUS(status);
1121                                 }
1122                         }
1123                         break;
1124
1125 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1126
1127                 default:
1128                         /* All NAMED_COMPLEX opcodes must be handled above */
1129                         break;
1130                 }
1131                 break;
1132
1133         case AML_CLASS_INTERNAL:
1134
1135                 /* case AML_INT_NAMEPATH_OP: */
1136                 break;
1137
1138         case AML_CLASS_METHOD_CALL:
1139
1140                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1141                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1142                                   walk_state, op, node));
1143
1144                 /*
1145                  * Lookup the method name and save the Node
1146                  */
1147                 status =
1148                     acpi_ns_lookup(walk_state->scope_info,
1149                                    arg->common.value.string, ACPI_TYPE_ANY,
1150                                    ACPI_IMODE_LOAD_PASS2,
1151                                    ACPI_NS_SEARCH_PARENT |
1152                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1153                                    &(new_node));
1154                 if (ACPI_SUCCESS(status)) {
1155                         /*
1156                          * Make sure that what we found is indeed a method
1157                          * We didn't search for a method on purpose, to see if the name
1158                          * would resolve
1159                          */
1160                         if (new_node->type != ACPI_TYPE_METHOD) {
1161                                 status = AE_AML_OPERAND_TYPE;
1162                         }
1163
1164                         /* We could put the returned object (Node) on the object stack for
1165                          * later, but for now, we will put it in the "op" object that the
1166                          * parser uses, so we can get it again at the end of this scope
1167                          */
1168                         op->common.node = new_node;
1169                 } else {
1170                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1171                 }
1172                 break;
1173
1174         default:
1175                 break;
1176         }
1177
1178       cleanup:
1179
1180         /* Remove the Node pushed at the very beginning */
1181
1182         walk_state->operands[0] = NULL;
1183         walk_state->num_operands = 0;
1184         return_ACPI_STATUS(status);
1185 }