Merge branch 'master' into next
[linux-2.6] / drivers / acpi / acpica / 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 "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acdispat.h"
49 #include "acinterp.h"
50 #include "acnamesp.h"
51 #include "acevents.h"
52
53 #ifdef ACPI_ASL_COMPILER
54 #include <acpi/acdisasm.h>
55 #endif
56
57 #define _COMPONENT          ACPI_DISPATCHER
58 ACPI_MODULE_NAME("dswload")
59
60 /*******************************************************************************
61  *
62  * FUNCTION:    acpi_ds_init_callbacks
63  *
64  * PARAMETERS:  walk_state      - Current state of the parse tree walk
65  *              pass_number     - 1, 2, or 3
66  *
67  * RETURN:      Status
68  *
69  * DESCRIPTION: Init walk state callbacks
70  *
71  ******************************************************************************/
72 acpi_status
73 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
74 {
75
76         switch (pass_number) {
77         case 1:
78                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
79                     ACPI_PARSE_DELETE_TREE;
80                 walk_state->descending_callback = acpi_ds_load1_begin_op;
81                 walk_state->ascending_callback = acpi_ds_load1_end_op;
82                 break;
83
84         case 2:
85                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
86                     ACPI_PARSE_DELETE_TREE;
87                 walk_state->descending_callback = acpi_ds_load2_begin_op;
88                 walk_state->ascending_callback = acpi_ds_load2_end_op;
89                 break;
90
91         case 3:
92 #ifndef ACPI_NO_METHOD_EXECUTION
93                 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
94                     ACPI_PARSE_DELETE_TREE;
95                 walk_state->descending_callback = acpi_ds_exec_begin_op;
96                 walk_state->ascending_callback = acpi_ds_exec_end_op;
97 #endif
98                 break;
99
100         default:
101                 return (AE_BAD_PARAMETER);
102         }
103
104         return (AE_OK);
105 }
106
107 /*******************************************************************************
108  *
109  * FUNCTION:    acpi_ds_load1_begin_op
110  *
111  * PARAMETERS:  walk_state      - Current state of the parse tree walk
112  *              out_op          - Where to return op if a new one is created
113  *
114  * RETURN:      Status
115  *
116  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
117  *
118  ******************************************************************************/
119
120 acpi_status
121 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
122                        union acpi_parse_object ** out_op)
123 {
124         union acpi_parse_object *op;
125         struct acpi_namespace_node *node;
126         acpi_status status;
127         acpi_object_type object_type;
128         char *path;
129         u32 flags;
130
131         ACPI_FUNCTION_TRACE(ds_load1_begin_op);
132
133         op = walk_state->op;
134         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
135                           walk_state));
136
137         /* We are only interested in opcodes that have an associated name */
138
139         if (op) {
140                 if (!(walk_state->op_info->flags & AML_NAMED)) {
141                         *out_op = op;
142                         return_ACPI_STATUS(AE_OK);
143                 }
144
145                 /* Check if this object has already been installed in the namespace */
146
147                 if (op->common.node) {
148                         *out_op = op;
149                         return_ACPI_STATUS(AE_OK);
150                 }
151         }
152
153         path = acpi_ps_get_next_namestring(&walk_state->parser_state);
154
155         /* Map the raw opcode into an internal object type */
156
157         object_type = walk_state->op_info->object_type;
158
159         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
160                           "State=%p Op=%p [%s]\n", walk_state, op,
161                           acpi_ut_get_type_name(object_type)));
162
163         switch (walk_state->opcode) {
164         case AML_SCOPE_OP:
165
166                 /*
167                  * The target name of the Scope() operator must exist at this point so
168                  * that we can actually open the scope to enter new names underneath it.
169                  * Allow search-to-root for single namesegs.
170                  */
171                 status =
172                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
173                                    ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
174                                    walk_state, &(node));
175 #ifdef ACPI_ASL_COMPILER
176                 if (status == AE_NOT_FOUND) {
177                         /*
178                          * Table disassembly:
179                          * Target of Scope() not found. Generate an External for it, and
180                          * insert the name into the namespace.
181                          */
182                         acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
183                         status =
184                             acpi_ns_lookup(walk_state->scope_info, path,
185                                            object_type, ACPI_IMODE_LOAD_PASS1,
186                                            ACPI_NS_SEARCH_PARENT, walk_state,
187                                            &node);
188                 }
189 #endif
190                 if (ACPI_FAILURE(status)) {
191                         ACPI_ERROR_NAMESPACE(path, status);
192                         return_ACPI_STATUS(status);
193                 }
194
195                 /*
196                  * Check to make sure that the target is
197                  * one of the opcodes that actually opens a scope
198                  */
199                 switch (node->type) {
200                 case ACPI_TYPE_ANY:
201                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope  */
202                 case ACPI_TYPE_DEVICE:
203                 case ACPI_TYPE_POWER:
204                 case ACPI_TYPE_PROCESSOR:
205                 case ACPI_TYPE_THERMAL:
206
207                         /* These are acceptable types */
208                         break;
209
210                 case ACPI_TYPE_INTEGER:
211                 case ACPI_TYPE_STRING:
212                 case ACPI_TYPE_BUFFER:
213
214                         /*
215                          * These types we will allow, but we will change the type. This
216                          * enables some existing code of the form:
217                          *
218                          *  Name (DEB, 0)
219                          *  Scope (DEB) { ... }
220                          *
221                          * Note: silently change the type here. On the second pass, we will report
222                          * a warning
223                          */
224                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
225                                           "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
226                                           path,
227                                           acpi_ut_get_type_name(node->type)));
228
229                         node->type = ACPI_TYPE_ANY;
230                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
231                         break;
232
233                 default:
234
235                         /* All other types are an error */
236
237                         ACPI_ERROR((AE_INFO,
238                                     "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
239                                     acpi_ut_get_type_name(node->type), path));
240
241                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
242                 }
243                 break;
244
245         default:
246                 /*
247                  * For all other named opcodes, we will enter the name into
248                  * the namespace.
249                  *
250                  * Setup the search flags.
251                  * Since we are entering a name into the namespace, we do not want to
252                  * enable the search-to-root upsearch.
253                  *
254                  * There are only two conditions where it is acceptable that the name
255                  * already exists:
256                  *    1) the Scope() operator can reopen a scoping object that was
257                  *       previously defined (Scope, Method, Device, etc.)
258                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
259                  *       buffer_field, or Package), the name of the object is already
260                  *       in the namespace.
261                  */
262                 if (walk_state->deferred_node) {
263
264                         /* This name is already in the namespace, get the node */
265
266                         node = walk_state->deferred_node;
267                         status = AE_OK;
268                         break;
269                 }
270
271                 /*
272                  * If we are executing a method, do not create any namespace objects
273                  * during the load phase, only during execution.
274                  */
275                 if (walk_state->method_node) {
276                         node = NULL;
277                         status = AE_OK;
278                         break;
279                 }
280
281                 flags = ACPI_NS_NO_UPSEARCH;
282                 if ((walk_state->opcode != AML_SCOPE_OP) &&
283                     (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
284                         flags |= ACPI_NS_ERROR_IF_FOUND;
285                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
286                                           "[%s] Cannot already exist\n",
287                                           acpi_ut_get_type_name(object_type)));
288                 } else {
289                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
290                                           "[%s] Both Find or Create allowed\n",
291                                           acpi_ut_get_type_name(object_type)));
292                 }
293
294                 /*
295                  * Enter the named type into the internal namespace. We enter the name
296                  * as we go downward in the parse tree. Any necessary subobjects that
297                  * involve arguments to the opcode must be created as we go back up the
298                  * parse tree later.
299                  */
300                 status =
301                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
302                                    ACPI_IMODE_LOAD_PASS1, flags, walk_state,
303                                    &node);
304                 if (ACPI_FAILURE(status)) {
305                         if (status == AE_ALREADY_EXISTS) {
306
307                                 /* The name already exists in this scope */
308
309                                 if (node->flags & ANOBJ_IS_EXTERNAL) {
310                                         /*
311                                          * Allow one create on an object or segment that was
312                                          * previously declared External
313                                          */
314                                         node->flags &= ~ANOBJ_IS_EXTERNAL;
315                                         node->type = (u8) object_type;
316
317                                         /* Just retyped a node, probably will need to open a scope */
318
319                                         if (acpi_ns_opens_scope(object_type)) {
320                                                 status =
321                                                     acpi_ds_scope_stack_push
322                                                     (node, object_type,
323                                                      walk_state);
324                                                 if (ACPI_FAILURE(status)) {
325                                                         return_ACPI_STATUS
326                                                             (status);
327                                                 }
328                                         }
329
330                                         status = AE_OK;
331                                 }
332                         }
333
334                         if (ACPI_FAILURE(status)) {
335                                 ACPI_ERROR_NAMESPACE(path, status);
336                                 return_ACPI_STATUS(status);
337                         }
338                 }
339                 break;
340         }
341
342         /* Common exit */
343
344         if (!op) {
345
346                 /* Create a new op */
347
348                 op = acpi_ps_alloc_op(walk_state->opcode);
349                 if (!op) {
350                         return_ACPI_STATUS(AE_NO_MEMORY);
351                 }
352         }
353
354         /* Initialize the op */
355
356 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
357         op->named.path = ACPI_CAST_PTR(u8, path);
358 #endif
359
360         if (node) {
361                 /*
362                  * Put the Node in the "op" object that the parser uses, so we
363                  * can get it again quickly when this scope is closed
364                  */
365                 op->common.node = node;
366                 op->named.name = node->name.integer;
367         }
368
369         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
370                            op);
371         *out_op = op;
372         return_ACPI_STATUS(status);
373 }
374
375 /*******************************************************************************
376  *
377  * FUNCTION:    acpi_ds_load1_end_op
378  *
379  * PARAMETERS:  walk_state      - Current state of the parse tree walk
380  *
381  * RETURN:      Status
382  *
383  * DESCRIPTION: Ascending callback used during the loading of the namespace,
384  *              both control methods and everything else.
385  *
386  ******************************************************************************/
387
388 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
389 {
390         union acpi_parse_object *op;
391         acpi_object_type object_type;
392         acpi_status status = AE_OK;
393
394         ACPI_FUNCTION_TRACE(ds_load1_end_op);
395
396         op = walk_state->op;
397         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
398                           walk_state));
399
400         /* We are only interested in opcodes that have an associated name */
401
402         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
403                 return_ACPI_STATUS(AE_OK);
404         }
405
406         /* Get the object type to determine if we should pop the scope */
407
408         object_type = walk_state->op_info->object_type;
409
410 #ifndef ACPI_NO_METHOD_EXECUTION
411         if (walk_state->op_info->flags & AML_FIELD) {
412                 /*
413                  * If we are executing a method, do not create any namespace objects
414                  * during the load phase, only during execution.
415                  */
416                 if (!walk_state->method_node) {
417                         if (walk_state->opcode == AML_FIELD_OP ||
418                             walk_state->opcode == AML_BANK_FIELD_OP ||
419                             walk_state->opcode == AML_INDEX_FIELD_OP) {
420                                 status =
421                                     acpi_ds_init_field_objects(op, walk_state);
422                         }
423                 }
424                 return_ACPI_STATUS(status);
425         }
426
427         /*
428          * If we are executing a method, do not create any namespace objects
429          * during the load phase, only during execution.
430          */
431         if (!walk_state->method_node) {
432                 if (op->common.aml_opcode == AML_REGION_OP) {
433                         status =
434                             acpi_ex_create_region(op->named.data,
435                                                   op->named.length,
436                                                   (acpi_adr_space_type) ((op->
437                                                                           common.
438                                                                           value.
439                                                                           arg)->
440                                                                          common.
441                                                                          value.
442                                                                          integer),
443                                                   walk_state);
444                         if (ACPI_FAILURE(status)) {
445                                 return_ACPI_STATUS(status);
446                         }
447                 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
448                         status =
449                             acpi_ex_create_region(op->named.data,
450                                                   op->named.length,
451                                                   REGION_DATA_TABLE,
452                                                   walk_state);
453                         if (ACPI_FAILURE(status)) {
454                                 return_ACPI_STATUS(status);
455                         }
456                 }
457         }
458 #endif
459
460         if (op->common.aml_opcode == AML_NAME_OP) {
461
462                 /* For Name opcode, get the object type from the argument */
463
464                 if (op->common.value.arg) {
465                         object_type = (acpi_ps_get_opcode_info((op->common.
466                                                                 value.arg)->
467                                                                common.
468                                                                aml_opcode))->
469                             object_type;
470
471                         /* Set node type if we have a namespace node */
472
473                         if (op->common.node) {
474                                 op->common.node->type = (u8) object_type;
475                         }
476                 }
477         }
478
479         /*
480          * If we are executing a method, do not create any namespace objects
481          * during the load phase, only during execution.
482          */
483         if (!walk_state->method_node) {
484                 if (op->common.aml_opcode == AML_METHOD_OP) {
485                         /*
486                          * method_op pkg_length name_string method_flags term_list
487                          *
488                          * Note: We must create the method node/object pair as soon as we
489                          * see the method declaration. This allows later pass1 parsing
490                          * of invocations of the method (need to know the number of
491                          * arguments.)
492                          */
493                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
494                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
495                                           walk_state, op, op->named.node));
496
497                         if (!acpi_ns_get_attached_object(op->named.node)) {
498                                 walk_state->operands[0] =
499                                     ACPI_CAST_PTR(void, op->named.node);
500                                 walk_state->num_operands = 1;
501
502                                 status =
503                                     acpi_ds_create_operands(walk_state,
504                                                             op->common.value.
505                                                             arg);
506                                 if (ACPI_SUCCESS(status)) {
507                                         status =
508                                             acpi_ex_create_method(op->named.
509                                                                   data,
510                                                                   op->named.
511                                                                   length,
512                                                                   walk_state);
513                                 }
514
515                                 walk_state->operands[0] = NULL;
516                                 walk_state->num_operands = 0;
517
518                                 if (ACPI_FAILURE(status)) {
519                                         return_ACPI_STATUS(status);
520                                 }
521                         }
522                 }
523         }
524
525         /* Pop the scope stack (only if loading a table) */
526
527         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
528                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
529                                   "(%s): Popping scope for Op %p\n",
530                                   acpi_ut_get_type_name(object_type), op));
531
532                 status = acpi_ds_scope_stack_pop(walk_state);
533         }
534
535         return_ACPI_STATUS(status);
536 }
537
538 /*******************************************************************************
539  *
540  * FUNCTION:    acpi_ds_load2_begin_op
541  *
542  * PARAMETERS:  walk_state      - Current state of the parse tree walk
543  *              out_op          - Wher to return op if a new one is created
544  *
545  * RETURN:      Status
546  *
547  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
548  *
549  ******************************************************************************/
550
551 acpi_status
552 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
553                        union acpi_parse_object **out_op)
554 {
555         union acpi_parse_object *op;
556         struct acpi_namespace_node *node;
557         acpi_status status;
558         acpi_object_type object_type;
559         char *buffer_ptr;
560         u32 flags;
561
562         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
563
564         op = walk_state->op;
565         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
566                           walk_state));
567
568         if (op) {
569                 if ((walk_state->control_state) &&
570                     (walk_state->control_state->common.state ==
571                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
572
573                         /* We are executing a while loop outside of a method */
574
575                         status = acpi_ds_exec_begin_op(walk_state, out_op);
576                         return_ACPI_STATUS(status);
577                 }
578
579                 /* We only care about Namespace opcodes here */
580
581                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
582                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
583                     (!(walk_state->op_info->flags & AML_NAMED))) {
584 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
585                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
586                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
587                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
588                                                   "Begin/EXEC: %s (fl %8.8X)\n",
589                                                   walk_state->op_info->name,
590                                                   walk_state->op_info->flags));
591
592                                 /* Executing a type1 or type2 opcode outside of a method */
593
594                                 status =
595                                     acpi_ds_exec_begin_op(walk_state, out_op);
596                                 return_ACPI_STATUS(status);
597                         }
598 #endif
599                         return_ACPI_STATUS(AE_OK);
600                 }
601
602                 /* Get the name we are going to enter or lookup in the namespace */
603
604                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
605
606                         /* For Namepath op, get the path string */
607
608                         buffer_ptr = op->common.value.string;
609                         if (!buffer_ptr) {
610
611                                 /* No name, just exit */
612
613                                 return_ACPI_STATUS(AE_OK);
614                         }
615                 } else {
616                         /* Get name from the op */
617
618                         buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
619                 }
620         } else {
621                 /* Get the namestring from the raw AML */
622
623                 buffer_ptr =
624                     acpi_ps_get_next_namestring(&walk_state->parser_state);
625         }
626
627         /* Map the opcode into an internal object type */
628
629         object_type = walk_state->op_info->object_type;
630
631         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
632                           "State=%p Op=%p Type=%X\n", walk_state, op,
633                           object_type));
634
635         switch (walk_state->opcode) {
636         case AML_FIELD_OP:
637         case AML_BANK_FIELD_OP:
638         case AML_INDEX_FIELD_OP:
639
640                 node = NULL;
641                 status = AE_OK;
642                 break;
643
644         case AML_INT_NAMEPATH_OP:
645                 /*
646                  * The name_path is an object reference to an existing object.
647                  * Don't enter the name into the namespace, but look it up
648                  * for use later.
649                  */
650                 status =
651                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
652                                    object_type, ACPI_IMODE_EXECUTE,
653                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
654                 break;
655
656         case AML_SCOPE_OP:
657                 /*
658                  * The Path is an object reference to an existing object.
659                  * Don't enter the name into the namespace, but look it up
660                  * for use later.
661                  */
662                 status =
663                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
664                                    object_type, ACPI_IMODE_EXECUTE,
665                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
666                 if (ACPI_FAILURE(status)) {
667 #ifdef ACPI_ASL_COMPILER
668                         if (status == AE_NOT_FOUND) {
669                                 status = AE_OK;
670                         } else {
671                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
672                         }
673 #else
674                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
675 #endif
676                         return_ACPI_STATUS(status);
677                 }
678
679                 /*
680                  * We must check to make sure that the target is
681                  * one of the opcodes that actually opens a scope
682                  */
683                 switch (node->type) {
684                 case ACPI_TYPE_ANY:
685                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
686                 case ACPI_TYPE_DEVICE:
687                 case ACPI_TYPE_POWER:
688                 case ACPI_TYPE_PROCESSOR:
689                 case ACPI_TYPE_THERMAL:
690
691                         /* These are acceptable types */
692                         break;
693
694                 case ACPI_TYPE_INTEGER:
695                 case ACPI_TYPE_STRING:
696                 case ACPI_TYPE_BUFFER:
697
698                         /*
699                          * These types we will allow, but we will change the type. This
700                          * enables some existing code of the form:
701                          *
702                          *  Name (DEB, 0)
703                          *  Scope (DEB) { ... }
704                          */
705                         ACPI_WARNING((AE_INFO,
706                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
707                                       buffer_ptr,
708                                       acpi_ut_get_type_name(node->type)));
709
710                         node->type = ACPI_TYPE_ANY;
711                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
712                         break;
713
714                 default:
715
716                         /* All other types are an error */
717
718                         ACPI_ERROR((AE_INFO,
719                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
720                                     acpi_ut_get_type_name(node->type),
721                                     buffer_ptr));
722
723                         return (AE_AML_OPERAND_TYPE);
724                 }
725                 break;
726
727         default:
728
729                 /* All other opcodes */
730
731                 if (op && op->common.node) {
732
733                         /* This op/node was previously entered into the namespace */
734
735                         node = op->common.node;
736
737                         if (acpi_ns_opens_scope(object_type)) {
738                                 status =
739                                     acpi_ds_scope_stack_push(node, object_type,
740                                                              walk_state);
741                                 if (ACPI_FAILURE(status)) {
742                                         return_ACPI_STATUS(status);
743                                 }
744                         }
745
746                         return_ACPI_STATUS(AE_OK);
747                 }
748
749                 /*
750                  * Enter the named type into the internal namespace. We enter the name
751                  * as we go downward in the parse tree. Any necessary subobjects that
752                  * involve arguments to the opcode must be created as we go back up the
753                  * parse tree later.
754                  *
755                  * Note: Name may already exist if we are executing a deferred opcode.
756                  */
757                 if (walk_state->deferred_node) {
758
759                         /* This name is already in the namespace, get the node */
760
761                         node = walk_state->deferred_node;
762                         status = AE_OK;
763                         break;
764                 }
765
766                 flags = ACPI_NS_NO_UPSEARCH;
767                 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
768
769                         /* Execution mode, node cannot already exist, node is temporary */
770
771                         flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
772                 }
773
774                 /* Add new entry or lookup existing entry */
775
776                 status =
777                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
778                                    object_type, ACPI_IMODE_LOAD_PASS2, flags,
779                                    walk_state, &node);
780
781                 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
782                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
783                                           "***New Node [%4.4s] %p is temporary\n",
784                                           acpi_ut_get_node_name(node), node));
785                 }
786                 break;
787         }
788
789         if (ACPI_FAILURE(status)) {
790                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
791                 return_ACPI_STATUS(status);
792         }
793
794         if (!op) {
795
796                 /* Create a new op */
797
798                 op = acpi_ps_alloc_op(walk_state->opcode);
799                 if (!op) {
800                         return_ACPI_STATUS(AE_NO_MEMORY);
801                 }
802
803                 /* Initialize the new op */
804
805                 if (node) {
806                         op->named.name = node->name.integer;
807                 }
808                 *out_op = op;
809         }
810
811         /*
812          * Put the Node in the "op" object that the parser uses, so we
813          * can get it again quickly when this scope is closed
814          */
815         op->common.node = node;
816         return_ACPI_STATUS(status);
817 }
818
819 /*******************************************************************************
820  *
821  * FUNCTION:    acpi_ds_load2_end_op
822  *
823  * PARAMETERS:  walk_state      - Current state of the parse tree walk
824  *
825  * RETURN:      Status
826  *
827  * DESCRIPTION: Ascending callback used during the loading of the namespace,
828  *              both control methods and everything else.
829  *
830  ******************************************************************************/
831
832 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
833 {
834         union acpi_parse_object *op;
835         acpi_status status = AE_OK;
836         acpi_object_type object_type;
837         struct acpi_namespace_node *node;
838         union acpi_parse_object *arg;
839         struct acpi_namespace_node *new_node;
840 #ifndef ACPI_NO_METHOD_EXECUTION
841         u32 i;
842         u8 region_space;
843 #endif
844
845         ACPI_FUNCTION_TRACE(ds_load2_end_op);
846
847         op = walk_state->op;
848         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
849                           walk_state->op_info->name, op, walk_state));
850
851         /* Check if opcode had an associated namespace object */
852
853         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
854 #ifndef ACPI_NO_METHOD_EXECUTION
855 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
856                 /* No namespace object. Executable opcode? */
857
858                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
859                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
860                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
861                                           "End/EXEC:   %s (fl %8.8X)\n",
862                                           walk_state->op_info->name,
863                                           walk_state->op_info->flags));
864
865                         /* Executing a type1 or type2 opcode outside of a method */
866
867                         status = acpi_ds_exec_end_op(walk_state);
868                         return_ACPI_STATUS(status);
869                 }
870 #endif
871 #endif
872                 return_ACPI_STATUS(AE_OK);
873         }
874
875         if (op->common.aml_opcode == AML_SCOPE_OP) {
876                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
877                                   "Ending scope Op=%p State=%p\n", op,
878                                   walk_state));
879         }
880
881         object_type = walk_state->op_info->object_type;
882
883         /*
884          * Get the Node/name from the earlier lookup
885          * (It was saved in the *op structure)
886          */
887         node = op->common.node;
888
889         /*
890          * Put the Node on the object stack (Contains the ACPI Name of
891          * this object)
892          */
893         walk_state->operands[0] = (void *)node;
894         walk_state->num_operands = 1;
895
896         /* Pop the scope stack */
897
898         if (acpi_ns_opens_scope(object_type) &&
899             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
900                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
901                                   "(%s) Popping scope for Op %p\n",
902                                   acpi_ut_get_type_name(object_type), op));
903
904                 status = acpi_ds_scope_stack_pop(walk_state);
905                 if (ACPI_FAILURE(status)) {
906                         goto cleanup;
907                 }
908         }
909
910         /*
911          * Named operations are as follows:
912          *
913          * AML_ALIAS
914          * AML_BANKFIELD
915          * AML_CREATEBITFIELD
916          * AML_CREATEBYTEFIELD
917          * AML_CREATEDWORDFIELD
918          * AML_CREATEFIELD
919          * AML_CREATEQWORDFIELD
920          * AML_CREATEWORDFIELD
921          * AML_DATA_REGION
922          * AML_DEVICE
923          * AML_EVENT
924          * AML_FIELD
925          * AML_INDEXFIELD
926          * AML_METHOD
927          * AML_METHODCALL
928          * AML_MUTEX
929          * AML_NAME
930          * AML_NAMEDFIELD
931          * AML_OPREGION
932          * AML_POWERRES
933          * AML_PROCESSOR
934          * AML_SCOPE
935          * AML_THERMALZONE
936          */
937
938         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
939                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
940                           acpi_ps_get_opcode_name(op->common.aml_opcode),
941                           walk_state, op, node));
942
943         /* Decode the opcode */
944
945         arg = op->common.value.arg;
946
947         switch (walk_state->op_info->type) {
948 #ifndef ACPI_NO_METHOD_EXECUTION
949
950         case AML_TYPE_CREATE_FIELD:
951                 /*
952                  * Create the field object, but the field buffer and index must
953                  * be evaluated later during the execution phase
954                  */
955                 status = acpi_ds_create_buffer_field(op, walk_state);
956                 break;
957
958         case AML_TYPE_NAMED_FIELD:
959                 /*
960                  * If we are executing a method, initialize the field
961                  */
962                 if (walk_state->method_node) {
963                         status = acpi_ds_init_field_objects(op, walk_state);
964                 }
965
966                 switch (op->common.aml_opcode) {
967                 case AML_INDEX_FIELD_OP:
968
969                         status =
970                             acpi_ds_create_index_field(op,
971                                                        (acpi_handle) arg->
972                                                        common.node, walk_state);
973                         break;
974
975                 case AML_BANK_FIELD_OP:
976
977                         status =
978                             acpi_ds_create_bank_field(op, arg->common.node,
979                                                       walk_state);
980                         break;
981
982                 case AML_FIELD_OP:
983
984                         status =
985                             acpi_ds_create_field(op, arg->common.node,
986                                                  walk_state);
987                         break;
988
989                 default:
990                         /* All NAMED_FIELD opcodes must be handled above */
991                         break;
992                 }
993                 break;
994
995         case AML_TYPE_NAMED_SIMPLE:
996
997                 status = acpi_ds_create_operands(walk_state, arg);
998                 if (ACPI_FAILURE(status)) {
999                         goto cleanup;
1000                 }
1001
1002                 switch (op->common.aml_opcode) {
1003                 case AML_PROCESSOR_OP:
1004
1005                         status = acpi_ex_create_processor(walk_state);
1006                         break;
1007
1008                 case AML_POWER_RES_OP:
1009
1010                         status = acpi_ex_create_power_resource(walk_state);
1011                         break;
1012
1013                 case AML_MUTEX_OP:
1014
1015                         status = acpi_ex_create_mutex(walk_state);
1016                         break;
1017
1018                 case AML_EVENT_OP:
1019
1020                         status = acpi_ex_create_event(walk_state);
1021                         break;
1022
1023                 case AML_ALIAS_OP:
1024
1025                         status = acpi_ex_create_alias(walk_state);
1026                         break;
1027
1028                 default:
1029                         /* Unknown opcode */
1030
1031                         status = AE_OK;
1032                         goto cleanup;
1033                 }
1034
1035                 /* Delete operands */
1036
1037                 for (i = 1; i < walk_state->num_operands; i++) {
1038                         acpi_ut_remove_reference(walk_state->operands[i]);
1039                         walk_state->operands[i] = NULL;
1040                 }
1041
1042                 break;
1043 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1044
1045         case AML_TYPE_NAMED_COMPLEX:
1046
1047                 switch (op->common.aml_opcode) {
1048 #ifndef ACPI_NO_METHOD_EXECUTION
1049                 case AML_REGION_OP:
1050                 case AML_DATA_REGION_OP:
1051
1052                         if (op->common.aml_opcode == AML_REGION_OP) {
1053                                 region_space = (acpi_adr_space_type)
1054                                     ((op->common.value.arg)->common.value.
1055                                      integer);
1056                         } else {
1057                                 region_space = REGION_DATA_TABLE;
1058                         }
1059
1060                         /*
1061                          * If we are executing a method, initialize the region
1062                          */
1063                         if (walk_state->method_node) {
1064                                 status =
1065                                     acpi_ex_create_region(op->named.data,
1066                                                           op->named.length,
1067                                                           region_space,
1068                                                           walk_state);
1069                                 if (ACPI_FAILURE(status)) {
1070                                         return (status);
1071                                 }
1072                         }
1073
1074                         /*
1075                          * The op_region is not fully parsed at this time. Only valid
1076                          * argument is the space_id. (We must save the address of the
1077                          * AML of the address and length operands)
1078                          */
1079
1080                         /*
1081                          * If we have a valid region, initialize it
1082                          * Namespace is NOT locked at this point.
1083                          */
1084                         status =
1085                             acpi_ev_initialize_region
1086                             (acpi_ns_get_attached_object(node), FALSE);
1087                         if (ACPI_FAILURE(status)) {
1088                                 /*
1089                                  *  If AE_NOT_EXIST is returned, it is not fatal
1090                                  *  because many regions get created before a handler
1091                                  *  is installed for said region.
1092                                  */
1093                                 if (AE_NOT_EXIST == status) {
1094                                         status = AE_OK;
1095                                 }
1096                         }
1097                         break;
1098
1099                 case AML_NAME_OP:
1100
1101                         status = acpi_ds_create_node(walk_state, node, op);
1102                         break;
1103
1104                 case AML_METHOD_OP:
1105                         /*
1106                          * method_op pkg_length name_string method_flags term_list
1107                          *
1108                          * Note: We must create the method node/object pair as soon as we
1109                          * see the method declaration. This allows later pass1 parsing
1110                          * of invocations of the method (need to know the number of
1111                          * arguments.)
1112                          */
1113                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1114                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1115                                           walk_state, op, op->named.node));
1116
1117                         if (!acpi_ns_get_attached_object(op->named.node)) {
1118                                 walk_state->operands[0] =
1119                                     ACPI_CAST_PTR(void, op->named.node);
1120                                 walk_state->num_operands = 1;
1121
1122                                 status =
1123                                     acpi_ds_create_operands(walk_state,
1124                                                             op->common.value.
1125                                                             arg);
1126                                 if (ACPI_SUCCESS(status)) {
1127                                         status =
1128                                             acpi_ex_create_method(op->named.
1129                                                                   data,
1130                                                                   op->named.
1131                                                                   length,
1132                                                                   walk_state);
1133                                 }
1134                                 walk_state->operands[0] = NULL;
1135                                 walk_state->num_operands = 0;
1136
1137                                 if (ACPI_FAILURE(status)) {
1138                                         return_ACPI_STATUS(status);
1139                                 }
1140                         }
1141                         break;
1142
1143 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1144
1145                 default:
1146                         /* All NAMED_COMPLEX opcodes must be handled above */
1147                         break;
1148                 }
1149                 break;
1150
1151         case AML_CLASS_INTERNAL:
1152
1153                 /* case AML_INT_NAMEPATH_OP: */
1154                 break;
1155
1156         case AML_CLASS_METHOD_CALL:
1157
1158                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1159                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1160                                   walk_state, op, node));
1161
1162                 /*
1163                  * Lookup the method name and save the Node
1164                  */
1165                 status =
1166                     acpi_ns_lookup(walk_state->scope_info,
1167                                    arg->common.value.string, ACPI_TYPE_ANY,
1168                                    ACPI_IMODE_LOAD_PASS2,
1169                                    ACPI_NS_SEARCH_PARENT |
1170                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1171                                    &(new_node));
1172                 if (ACPI_SUCCESS(status)) {
1173                         /*
1174                          * Make sure that what we found is indeed a method
1175                          * We didn't search for a method on purpose, to see if the name
1176                          * would resolve
1177                          */
1178                         if (new_node->type != ACPI_TYPE_METHOD) {
1179                                 status = AE_AML_OPERAND_TYPE;
1180                         }
1181
1182                         /* We could put the returned object (Node) on the object stack for
1183                          * later, but for now, we will put it in the "op" object that the
1184                          * parser uses, so we can get it again at the end of this scope
1185                          */
1186                         op->common.node = new_node;
1187                 } else {
1188                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1189                 }
1190                 break;
1191
1192         default:
1193                 break;
1194         }
1195
1196       cleanup:
1197
1198         /* Remove the Node pushed at the very beginning */
1199
1200         walk_state->operands[0] = NULL;
1201         walk_state->num_operands = 0;
1202         return_ACPI_STATUS(status);
1203 }