Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[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 - 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 <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                 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
447                         status =
448                             acpi_ex_create_region(op->named.data,
449                                                   op->named.length,
450                                                   REGION_DATA_TABLE,
451                                                   walk_state);
452                         if (ACPI_FAILURE(status)) {
453                                 return_ACPI_STATUS(status);
454                         }
455                 }
456         }
457 #endif
458
459         if (op->common.aml_opcode == AML_NAME_OP) {
460
461                 /* For Name opcode, get the object type from the argument */
462
463                 if (op->common.value.arg) {
464                         object_type = (acpi_ps_get_opcode_info((op->common.
465                                                                 value.arg)->
466                                                                common.
467                                                                aml_opcode))->
468                             object_type;
469
470                         /* Set node type if we have a namespace node */
471
472                         if (op->common.node) {
473                                 op->common.node->type = (u8) object_type;
474                         }
475                 }
476         }
477
478         /*
479          * If we are executing a method, do not create any namespace objects
480          * during the load phase, only during execution.
481          */
482         if (!walk_state->method_node) {
483                 if (op->common.aml_opcode == AML_METHOD_OP) {
484                         /*
485                          * method_op pkg_length name_string method_flags term_list
486                          *
487                          * Note: We must create the method node/object pair as soon as we
488                          * see the method declaration. This allows later pass1 parsing
489                          * of invocations of the method (need to know the number of
490                          * arguments.)
491                          */
492                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
493                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
494                                           walk_state, op, op->named.node));
495
496                         if (!acpi_ns_get_attached_object(op->named.node)) {
497                                 walk_state->operands[0] =
498                                     ACPI_CAST_PTR(void, op->named.node);
499                                 walk_state->num_operands = 1;
500
501                                 status =
502                                     acpi_ds_create_operands(walk_state,
503                                                             op->common.value.
504                                                             arg);
505                                 if (ACPI_SUCCESS(status)) {
506                                         status =
507                                             acpi_ex_create_method(op->named.
508                                                                   data,
509                                                                   op->named.
510                                                                   length,
511                                                                   walk_state);
512                                 }
513
514                                 walk_state->operands[0] = NULL;
515                                 walk_state->num_operands = 0;
516
517                                 if (ACPI_FAILURE(status)) {
518                                         return_ACPI_STATUS(status);
519                                 }
520                         }
521                 }
522         }
523
524         /* Pop the scope stack (only if loading a table) */
525
526         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
527                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
528                                   "(%s): Popping scope for Op %p\n",
529                                   acpi_ut_get_type_name(object_type), op));
530
531                 status = acpi_ds_scope_stack_pop(walk_state);
532         }
533
534         return_ACPI_STATUS(status);
535 }
536
537 /*******************************************************************************
538  *
539  * FUNCTION:    acpi_ds_load2_begin_op
540  *
541  * PARAMETERS:  walk_state      - Current state of the parse tree walk
542  *              out_op          - Wher to return op if a new one is created
543  *
544  * RETURN:      Status
545  *
546  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
547  *
548  ******************************************************************************/
549
550 acpi_status
551 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
552                        union acpi_parse_object **out_op)
553 {
554         union acpi_parse_object *op;
555         struct acpi_namespace_node *node;
556         acpi_status status;
557         acpi_object_type object_type;
558         char *buffer_ptr;
559         u32 flags;
560
561         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
562
563         op = walk_state->op;
564         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
565                           walk_state));
566
567         if (op) {
568                 if ((walk_state->control_state) &&
569                     (walk_state->control_state->common.state ==
570                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
571
572                         /* We are executing a while loop outside of a method */
573
574                         status = acpi_ds_exec_begin_op(walk_state, out_op);
575                         return_ACPI_STATUS(status);
576                 }
577
578                 /* We only care about Namespace opcodes here */
579
580                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
581                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
582                     (!(walk_state->op_info->flags & AML_NAMED))) {
583 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
584                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
585                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
586                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
587                                                   "Begin/EXEC: %s (fl %8.8X)\n",
588                                                   walk_state->op_info->name,
589                                                   walk_state->op_info->flags));
590
591                                 /* Executing a type1 or type2 opcode outside of a method */
592
593                                 status =
594                                     acpi_ds_exec_begin_op(walk_state, out_op);
595                                 return_ACPI_STATUS(status);
596                         }
597 #endif
598                         return_ACPI_STATUS(AE_OK);
599                 }
600
601                 /* Get the name we are going to enter or lookup in the namespace */
602
603                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
604
605                         /* For Namepath op, get the path string */
606
607                         buffer_ptr = op->common.value.string;
608                         if (!buffer_ptr) {
609
610                                 /* No name, just exit */
611
612                                 return_ACPI_STATUS(AE_OK);
613                         }
614                 } else {
615                         /* Get name from the op */
616
617                         buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
618                 }
619         } else {
620                 /* Get the namestring from the raw AML */
621
622                 buffer_ptr =
623                     acpi_ps_get_next_namestring(&walk_state->parser_state);
624         }
625
626         /* Map the opcode into an internal object type */
627
628         object_type = walk_state->op_info->object_type;
629
630         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
631                           "State=%p Op=%p Type=%X\n", walk_state, op,
632                           object_type));
633
634         switch (walk_state->opcode) {
635         case AML_FIELD_OP:
636         case AML_BANK_FIELD_OP:
637         case AML_INDEX_FIELD_OP:
638
639                 node = NULL;
640                 status = AE_OK;
641                 break;
642
643         case AML_INT_NAMEPATH_OP:
644                 /*
645                  * The name_path is an object reference to an existing object.
646                  * Don't enter the name into the namespace, but look it up
647                  * for use later.
648                  */
649                 status =
650                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
651                                    object_type, ACPI_IMODE_EXECUTE,
652                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
653                 break;
654
655         case AML_SCOPE_OP:
656                 /*
657                  * The Path is an object reference to an existing object.
658                  * Don't enter the name into the namespace, but look it up
659                  * for use later.
660                  */
661                 status =
662                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
663                                    object_type, ACPI_IMODE_EXECUTE,
664                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
665                 if (ACPI_FAILURE(status)) {
666 #ifdef ACPI_ASL_COMPILER
667                         if (status == AE_NOT_FOUND) {
668                                 status = AE_OK;
669                         } else {
670                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
671                         }
672 #else
673                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
674 #endif
675                         return_ACPI_STATUS(status);
676                 }
677
678                 /*
679                  * We must check to make sure that the target is
680                  * one of the opcodes that actually opens a scope
681                  */
682                 switch (node->type) {
683                 case ACPI_TYPE_ANY:
684                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
685                 case ACPI_TYPE_DEVICE:
686                 case ACPI_TYPE_POWER:
687                 case ACPI_TYPE_PROCESSOR:
688                 case ACPI_TYPE_THERMAL:
689
690                         /* These are acceptable types */
691                         break;
692
693                 case ACPI_TYPE_INTEGER:
694                 case ACPI_TYPE_STRING:
695                 case ACPI_TYPE_BUFFER:
696
697                         /*
698                          * These types we will allow, but we will change the type. This
699                          * enables some existing code of the form:
700                          *
701                          *  Name (DEB, 0)
702                          *  Scope (DEB) { ... }
703                          */
704                         ACPI_WARNING((AE_INFO,
705                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
706                                       buffer_ptr,
707                                       acpi_ut_get_type_name(node->type)));
708
709                         node->type = ACPI_TYPE_ANY;
710                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
711                         break;
712
713                 default:
714
715                         /* All other types are an error */
716
717                         ACPI_ERROR((AE_INFO,
718                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
719                                     acpi_ut_get_type_name(node->type),
720                                     buffer_ptr));
721
722                         return (AE_AML_OPERAND_TYPE);
723                 }
724                 break;
725
726         default:
727
728                 /* All other opcodes */
729
730                 if (op && op->common.node) {
731
732                         /* This op/node was previously entered into the namespace */
733
734                         node = op->common.node;
735
736                         if (acpi_ns_opens_scope(object_type)) {
737                                 status =
738                                     acpi_ds_scope_stack_push(node, object_type,
739                                                              walk_state);
740                                 if (ACPI_FAILURE(status)) {
741                                         return_ACPI_STATUS(status);
742                                 }
743                         }
744
745                         return_ACPI_STATUS(AE_OK);
746                 }
747
748                 /*
749                  * Enter the named type into the internal namespace. We enter the name
750                  * as we go downward in the parse tree. Any necessary subobjects that
751                  * involve arguments to the opcode must be created as we go back up the
752                  * parse tree later.
753                  *
754                  * Note: Name may already exist if we are executing a deferred opcode.
755                  */
756                 if (walk_state->deferred_node) {
757
758                         /* This name is already in the namespace, get the node */
759
760                         node = walk_state->deferred_node;
761                         status = AE_OK;
762                         break;
763                 }
764
765                 flags = ACPI_NS_NO_UPSEARCH;
766                 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
767
768                         /* Execution mode, node cannot already exist, node is temporary */
769
770                         flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
771                 }
772
773                 /* Add new entry or lookup existing entry */
774
775                 status =
776                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
777                                    object_type, ACPI_IMODE_LOAD_PASS2, flags,
778                                    walk_state, &node);
779
780                 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
781                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
782                                           "***New Node [%4.4s] %p is temporary\n",
783                                           acpi_ut_get_node_name(node), node));
784                 }
785                 break;
786         }
787
788         if (ACPI_FAILURE(status)) {
789                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
790                 return_ACPI_STATUS(status);
791         }
792
793         if (!op) {
794
795                 /* Create a new op */
796
797                 op = acpi_ps_alloc_op(walk_state->opcode);
798                 if (!op) {
799                         return_ACPI_STATUS(AE_NO_MEMORY);
800                 }
801
802                 /* Initialize the new op */
803
804                 if (node) {
805                         op->named.name = node->name.integer;
806                 }
807                 *out_op = op;
808         }
809
810         /*
811          * Put the Node in the "op" object that the parser uses, so we
812          * can get it again quickly when this scope is closed
813          */
814         op->common.node = node;
815         return_ACPI_STATUS(status);
816 }
817
818 /*******************************************************************************
819  *
820  * FUNCTION:    acpi_ds_load2_end_op
821  *
822  * PARAMETERS:  walk_state      - Current state of the parse tree walk
823  *
824  * RETURN:      Status
825  *
826  * DESCRIPTION: Ascending callback used during the loading of the namespace,
827  *              both control methods and everything else.
828  *
829  ******************************************************************************/
830
831 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
832 {
833         union acpi_parse_object *op;
834         acpi_status status = AE_OK;
835         acpi_object_type object_type;
836         struct acpi_namespace_node *node;
837         union acpi_parse_object *arg;
838         struct acpi_namespace_node *new_node;
839 #ifndef ACPI_NO_METHOD_EXECUTION
840         u32 i;
841         u8 region_space;
842 #endif
843
844         ACPI_FUNCTION_TRACE(ds_load2_end_op);
845
846         op = walk_state->op;
847         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
848                           walk_state->op_info->name, op, walk_state));
849
850         /* Check if opcode had an associated namespace object */
851
852         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
853 #ifndef ACPI_NO_METHOD_EXECUTION
854 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
855                 /* No namespace object. Executable opcode? */
856
857                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
858                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
859                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
860                                           "End/EXEC:   %s (fl %8.8X)\n",
861                                           walk_state->op_info->name,
862                                           walk_state->op_info->flags));
863
864                         /* Executing a type1 or type2 opcode outside of a method */
865
866                         status = acpi_ds_exec_end_op(walk_state);
867                         return_ACPI_STATUS(status);
868                 }
869 #endif
870 #endif
871                 return_ACPI_STATUS(AE_OK);
872         }
873
874         if (op->common.aml_opcode == AML_SCOPE_OP) {
875                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
876                                   "Ending scope Op=%p State=%p\n", op,
877                                   walk_state));
878         }
879
880         object_type = walk_state->op_info->object_type;
881
882         /*
883          * Get the Node/name from the earlier lookup
884          * (It was saved in the *op structure)
885          */
886         node = op->common.node;
887
888         /*
889          * Put the Node on the object stack (Contains the ACPI Name of
890          * this object)
891          */
892         walk_state->operands[0] = (void *)node;
893         walk_state->num_operands = 1;
894
895         /* Pop the scope stack */
896
897         if (acpi_ns_opens_scope(object_type) &&
898             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
899                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
900                                   "(%s) Popping scope for Op %p\n",
901                                   acpi_ut_get_type_name(object_type), op));
902
903                 status = acpi_ds_scope_stack_pop(walk_state);
904                 if (ACPI_FAILURE(status)) {
905                         goto cleanup;
906                 }
907         }
908
909         /*
910          * Named operations are as follows:
911          *
912          * AML_ALIAS
913          * AML_BANKFIELD
914          * AML_CREATEBITFIELD
915          * AML_CREATEBYTEFIELD
916          * AML_CREATEDWORDFIELD
917          * AML_CREATEFIELD
918          * AML_CREATEQWORDFIELD
919          * AML_CREATEWORDFIELD
920          * AML_DATA_REGION
921          * AML_DEVICE
922          * AML_EVENT
923          * AML_FIELD
924          * AML_INDEXFIELD
925          * AML_METHOD
926          * AML_METHODCALL
927          * AML_MUTEX
928          * AML_NAME
929          * AML_NAMEDFIELD
930          * AML_OPREGION
931          * AML_POWERRES
932          * AML_PROCESSOR
933          * AML_SCOPE
934          * AML_THERMALZONE
935          */
936
937         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
938                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
939                           acpi_ps_get_opcode_name(op->common.aml_opcode),
940                           walk_state, op, node));
941
942         /* Decode the opcode */
943
944         arg = op->common.value.arg;
945
946         switch (walk_state->op_info->type) {
947 #ifndef ACPI_NO_METHOD_EXECUTION
948
949         case AML_TYPE_CREATE_FIELD:
950                 /*
951                  * Create the field object, but the field buffer and index must
952                  * be evaluated later during the execution phase
953                  */
954                 status = acpi_ds_create_buffer_field(op, walk_state);
955                 break;
956
957         case AML_TYPE_NAMED_FIELD:
958                 /*
959                  * If we are executing a method, initialize the field
960                  */
961                 if (walk_state->method_node) {
962                         status = acpi_ds_init_field_objects(op, walk_state);
963                 }
964
965                 switch (op->common.aml_opcode) {
966                 case AML_INDEX_FIELD_OP:
967
968                         status =
969                             acpi_ds_create_index_field(op,
970                                                        (acpi_handle) arg->
971                                                        common.node, walk_state);
972                         break;
973
974                 case AML_BANK_FIELD_OP:
975
976                         status =
977                             acpi_ds_create_bank_field(op, arg->common.node,
978                                                       walk_state);
979                         break;
980
981                 case AML_FIELD_OP:
982
983                         status =
984                             acpi_ds_create_field(op, arg->common.node,
985                                                  walk_state);
986                         break;
987
988                 default:
989                         /* All NAMED_FIELD opcodes must be handled above */
990                         break;
991                 }
992                 break;
993
994         case AML_TYPE_NAMED_SIMPLE:
995
996                 status = acpi_ds_create_operands(walk_state, arg);
997                 if (ACPI_FAILURE(status)) {
998                         goto cleanup;
999                 }
1000
1001                 switch (op->common.aml_opcode) {
1002                 case AML_PROCESSOR_OP:
1003
1004                         status = acpi_ex_create_processor(walk_state);
1005                         break;
1006
1007                 case AML_POWER_RES_OP:
1008
1009                         status = acpi_ex_create_power_resource(walk_state);
1010                         break;
1011
1012                 case AML_MUTEX_OP:
1013
1014                         status = acpi_ex_create_mutex(walk_state);
1015                         break;
1016
1017                 case AML_EVENT_OP:
1018
1019                         status = acpi_ex_create_event(walk_state);
1020                         break;
1021
1022                 case AML_ALIAS_OP:
1023
1024                         status = acpi_ex_create_alias(walk_state);
1025                         break;
1026
1027                 default:
1028                         /* Unknown opcode */
1029
1030                         status = AE_OK;
1031                         goto cleanup;
1032                 }
1033
1034                 /* Delete operands */
1035
1036                 for (i = 1; i < walk_state->num_operands; i++) {
1037                         acpi_ut_remove_reference(walk_state->operands[i]);
1038                         walk_state->operands[i] = NULL;
1039                 }
1040
1041                 break;
1042 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1043
1044         case AML_TYPE_NAMED_COMPLEX:
1045
1046                 switch (op->common.aml_opcode) {
1047 #ifndef ACPI_NO_METHOD_EXECUTION
1048                 case AML_REGION_OP:
1049                 case AML_DATA_REGION_OP:
1050
1051                         if (op->common.aml_opcode == AML_REGION_OP) {
1052                                 region_space = (acpi_adr_space_type)
1053                                     ((op->common.value.arg)->common.value.
1054                                      integer);
1055                         } else {
1056                                 region_space = REGION_DATA_TABLE;
1057                         }
1058
1059                         /*
1060                          * If we are executing a method, initialize the region
1061                          */
1062                         if (walk_state->method_node) {
1063                                 status =
1064                                     acpi_ex_create_region(op->named.data,
1065                                                           op->named.length,
1066                                                           region_space,
1067                                                           walk_state);
1068                                 if (ACPI_FAILURE(status)) {
1069                                         return (status);
1070                                 }
1071                         }
1072
1073                         /*
1074                          * The op_region is not fully parsed at this time. Only valid
1075                          * argument is the space_id. (We must save the address of the
1076                          * AML of the address and length operands)
1077                          */
1078
1079                         /*
1080                          * If we have a valid region, initialize it
1081                          * Namespace is NOT locked at this point.
1082                          */
1083                         status =
1084                             acpi_ev_initialize_region
1085                             (acpi_ns_get_attached_object(node), FALSE);
1086                         if (ACPI_FAILURE(status)) {
1087                                 /*
1088                                  *  If AE_NOT_EXIST is returned, it is not fatal
1089                                  *  because many regions get created before a handler
1090                                  *  is installed for said region.
1091                                  */
1092                                 if (AE_NOT_EXIST == status) {
1093                                         status = AE_OK;
1094                                 }
1095                         }
1096                         break;
1097
1098                 case AML_NAME_OP:
1099
1100                         status = acpi_ds_create_node(walk_state, node, op);
1101                         break;
1102
1103                 case AML_METHOD_OP:
1104                         /*
1105                          * method_op pkg_length name_string method_flags term_list
1106                          *
1107                          * Note: We must create the method node/object pair as soon as we
1108                          * see the method declaration. This allows later pass1 parsing
1109                          * of invocations of the method (need to know the number of
1110                          * arguments.)
1111                          */
1112                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1113                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1114                                           walk_state, op, op->named.node));
1115
1116                         if (!acpi_ns_get_attached_object(op->named.node)) {
1117                                 walk_state->operands[0] =
1118                                     ACPI_CAST_PTR(void, op->named.node);
1119                                 walk_state->num_operands = 1;
1120
1121                                 status =
1122                                     acpi_ds_create_operands(walk_state,
1123                                                             op->common.value.
1124                                                             arg);
1125                                 if (ACPI_SUCCESS(status)) {
1126                                         status =
1127                                             acpi_ex_create_method(op->named.
1128                                                                   data,
1129                                                                   op->named.
1130                                                                   length,
1131                                                                   walk_state);
1132                                 }
1133                                 walk_state->operands[0] = NULL;
1134                                 walk_state->num_operands = 0;
1135
1136                                 if (ACPI_FAILURE(status)) {
1137                                         return_ACPI_STATUS(status);
1138                                 }
1139                         }
1140                         break;
1141
1142 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1143
1144                 default:
1145                         /* All NAMED_COMPLEX opcodes must be handled above */
1146                         break;
1147                 }
1148                 break;
1149
1150         case AML_CLASS_INTERNAL:
1151
1152                 /* case AML_INT_NAMEPATH_OP: */
1153                 break;
1154
1155         case AML_CLASS_METHOD_CALL:
1156
1157                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1158                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1159                                   walk_state, op, node));
1160
1161                 /*
1162                  * Lookup the method name and save the Node
1163                  */
1164                 status =
1165                     acpi_ns_lookup(walk_state->scope_info,
1166                                    arg->common.value.string, ACPI_TYPE_ANY,
1167                                    ACPI_IMODE_LOAD_PASS2,
1168                                    ACPI_NS_SEARCH_PARENT |
1169                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1170                                    &(new_node));
1171                 if (ACPI_SUCCESS(status)) {
1172                         /*
1173                          * Make sure that what we found is indeed a method
1174                          * We didn't search for a method on purpose, to see if the name
1175                          * would resolve
1176                          */
1177                         if (new_node->type != ACPI_TYPE_METHOD) {
1178                                 status = AE_AML_OPERAND_TYPE;
1179                         }
1180
1181                         /* We could put the returned object (Node) on the object stack for
1182                          * later, but for now, we will put it in the "op" object that the
1183                          * parser uses, so we can get it again at the end of this scope
1184                          */
1185                         op->common.node = new_node;
1186                 } else {
1187                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1188                 }
1189                 break;
1190
1191         default:
1192                 break;
1193         }
1194
1195       cleanup:
1196
1197         /* Remove the Node pushed at the very beginning */
1198
1199         walk_state->operands[0] = NULL;
1200         walk_state->num_operands = 0;
1201         return_ACPI_STATUS(status);
1202 }