Pull trivial2 into release branch
[linux-2.6] / drivers / acpi / dispatcher / dswload.c
1 /******************************************************************************
2  *
3  * Module Name: dswload - Dispatcher namespace load callbacks
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2006, R. Byron Moore
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43
44 #include <acpi/acpi.h>
45 #include <acpi/acparser.h>
46 #include <acpi/amlcode.h>
47 #include <acpi/acdispat.h>
48 #include <acpi/acinterp.h>
49 #include <acpi/acnamesp.h>
50 #include <acpi/acevents.h>
51
52 #ifdef ACPI_ASL_COMPILER
53 #include <acpi/acdisasm.h>
54 #endif
55
56 #define _COMPONENT          ACPI_DISPATCHER
57 ACPI_MODULE_NAME("dswload")
58
59 /*******************************************************************************
60  *
61  * FUNCTION:    acpi_ds_init_callbacks
62  *
63  * PARAMETERS:  walk_state      - Current state of the parse tree walk
64  *              pass_number     - 1, 2, or 3
65  *
66  * RETURN:      Status
67  *
68  * DESCRIPTION: Init walk state callbacks
69  *
70  ******************************************************************************/
71 acpi_status
72 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
73 {
74
75         switch (pass_number) {
76         case 1:
77                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
78                     ACPI_PARSE_DELETE_TREE;
79                 walk_state->descending_callback = acpi_ds_load1_begin_op;
80                 walk_state->ascending_callback = acpi_ds_load1_end_op;
81                 break;
82
83         case 2:
84                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
85                     ACPI_PARSE_DELETE_TREE;
86                 walk_state->descending_callback = acpi_ds_load2_begin_op;
87                 walk_state->ascending_callback = acpi_ds_load2_end_op;
88                 break;
89
90         case 3:
91 #ifndef ACPI_NO_METHOD_EXECUTION
92                 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
93                     ACPI_PARSE_DELETE_TREE;
94                 walk_state->descending_callback = acpi_ds_exec_begin_op;
95                 walk_state->ascending_callback = acpi_ds_exec_end_op;
96 #endif
97                 break;
98
99         default:
100                 return (AE_BAD_PARAMETER);
101         }
102
103         return (AE_OK);
104 }
105
106 /*******************************************************************************
107  *
108  * FUNCTION:    acpi_ds_load1_begin_op
109  *
110  * PARAMETERS:  walk_state      - Current state of the parse tree walk
111  *              out_op          - Where to return op if a new one is created
112  *
113  * RETURN:      Status
114  *
115  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
116  *
117  ******************************************************************************/
118
119 acpi_status
120 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
121                        union acpi_parse_object ** out_op)
122 {
123         union acpi_parse_object *op;
124         struct acpi_namespace_node *node;
125         acpi_status status;
126         acpi_object_type object_type;
127         char *path;
128         u32 flags;
129
130         ACPI_FUNCTION_TRACE(ds_load1_begin_op);
131
132         op = walk_state->op;
133         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
134                           walk_state));
135
136         /* We are only interested in opcodes that have an associated name */
137
138         if (op) {
139                 if (!(walk_state->op_info->flags & AML_NAMED)) {
140                         *out_op = op;
141                         return_ACPI_STATUS(AE_OK);
142                 }
143
144                 /* Check if this object has already been installed in the namespace */
145
146                 if (op->common.node) {
147                         *out_op = op;
148                         return_ACPI_STATUS(AE_OK);
149                 }
150         }
151
152         path = acpi_ps_get_next_namestring(&walk_state->parser_state);
153
154         /* Map the raw opcode into an internal object type */
155
156         object_type = walk_state->op_info->object_type;
157
158         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
159                           "State=%p Op=%p [%s]\n", walk_state, op,
160                           acpi_ut_get_type_name(object_type)));
161
162         switch (walk_state->opcode) {
163         case AML_SCOPE_OP:
164
165                 /*
166                  * The target name of the Scope() operator must exist at this point so
167                  * that we can actually open the scope to enter new names underneath it.
168                  * Allow search-to-root for single namesegs.
169                  */
170                 status =
171                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
172                                    ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
173                                    walk_state, &(node));
174 #ifdef ACPI_ASL_COMPILER
175                 if (status == AE_NOT_FOUND) {
176                         /*
177                          * Table disassembly:
178                          * Target of Scope() not found.  Generate an External for it, and
179                          * insert the name into the namespace.
180                          */
181                         acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
182                         status =
183                             acpi_ns_lookup(walk_state->scope_info, path,
184                                            object_type, ACPI_IMODE_LOAD_PASS1,
185                                            ACPI_NS_SEARCH_PARENT, walk_state,
186                                            &node);
187                 }
188 #endif
189                 if (ACPI_FAILURE(status)) {
190                         ACPI_ERROR_NAMESPACE(path, status);
191                         return_ACPI_STATUS(status);
192                 }
193
194                 /*
195                  * Check to make sure that the target is
196                  * one of the opcodes that actually opens a scope
197                  */
198                 switch (node->type) {
199                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope  */
200                 case ACPI_TYPE_DEVICE:
201                 case ACPI_TYPE_POWER:
202                 case ACPI_TYPE_PROCESSOR:
203                 case ACPI_TYPE_THERMAL:
204
205                         /* These are acceptable types */
206                         break;
207
208                 case ACPI_TYPE_INTEGER:
209                 case ACPI_TYPE_STRING:
210                 case ACPI_TYPE_BUFFER:
211
212                         /*
213                          * These types we will allow, but we will change the type.  This
214                          * enables some existing code of the form:
215                          *
216                          *  Name (DEB, 0)
217                          *  Scope (DEB) { ... }
218                          *
219                          * Note: silently change the type here.  On the second pass, we will report
220                          * a warning
221                          */
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                 /*
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
263                 if (walk_state->deferred_node) {
264
265                         /* This name is already in the namespace, get the node */
266
267                         node = walk_state->deferred_node;
268                         status = AE_OK;
269                         break;
270                 }
271
272                 /*
273                  * If we are executing a method, do not create any namespace objects
274                  * during the load phase, only during execution.
275                  */
276                 if (walk_state->method_node) {
277                         node = NULL;
278                         status = AE_OK;
279                         break;
280                 }
281
282                 flags = ACPI_NS_NO_UPSEARCH;
283                 if ((walk_state->opcode != AML_SCOPE_OP) &&
284                     (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
285                         flags |= ACPI_NS_ERROR_IF_FOUND;
286                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
287                                           "[%s] Cannot already exist\n",
288                                           acpi_ut_get_type_name(object_type)));
289                 } else {
290                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
291                                           "[%s] Both Find or Create allowed\n",
292                                           acpi_ut_get_type_name(object_type)));
293                 }
294
295                 /*
296                  * Enter the named type into the internal namespace.  We enter the name
297                  * as we go downward in the parse tree.  Any necessary subobjects that
298                  * involve arguments to the opcode must be created as we go back up the
299                  * parse tree later.
300                  */
301                 status =
302                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
303                                    ACPI_IMODE_LOAD_PASS1, flags, walk_state,
304                                    &node);
305                 if (ACPI_FAILURE(status)) {
306                         if (status == AE_ALREADY_EXISTS) {
307
308                                 /* The name already exists in this scope */
309
310                                 if (node->flags & ANOBJ_IS_EXTERNAL) {
311                                         /*
312                                          * Allow one create on an object or segment that was
313                                          * previously declared External
314                                          */
315                                         node->flags &= ~ANOBJ_IS_EXTERNAL;
316                                         node->type = (u8) object_type;
317
318                                         /* Just retyped a node, probably will need to open a scope */
319
320                                         if (acpi_ns_opens_scope(object_type)) {
321                                                 status =
322                                                     acpi_ds_scope_stack_push
323                                                     (node, object_type,
324                                                      walk_state);
325                                                 if (ACPI_FAILURE(status)) {
326                                                         return_ACPI_STATUS
327                                                             (status);
328                                                 }
329                                         }
330                                         status = AE_OK;
331                                 }
332                         }
333
334                         if (ACPI_FAILURE(status)) {
335
336                                 ACPI_ERROR_NAMESPACE(path, status);
337                                 return_ACPI_STATUS(status);
338                         }
339                 }
340                 break;
341         }
342
343         /* Common exit */
344
345         if (!op) {
346
347                 /* Create a new op */
348
349                 op = acpi_ps_alloc_op(walk_state->opcode);
350                 if (!op) {
351                         return_ACPI_STATUS(AE_NO_MEMORY);
352                 }
353         }
354
355         /* Initialize the op */
356
357 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
358         op->named.path = ACPI_CAST_PTR(u8, path);
359 #endif
360
361         if (node) {
362                 /*
363                  * Put the Node in the "op" object that the parser uses, so we
364                  * can get it again quickly when this scope is closed
365                  */
366                 op->common.node = node;
367                 op->named.name = node->name.integer;
368         }
369
370         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
371                            op);
372         *out_op = op;
373         return_ACPI_STATUS(status);
374 }
375
376 /*******************************************************************************
377  *
378  * FUNCTION:    acpi_ds_load1_end_op
379  *
380  * PARAMETERS:  walk_state      - Current state of the parse tree walk
381  *
382  * RETURN:      Status
383  *
384  * DESCRIPTION: Ascending callback used during the loading of the namespace,
385  *              both control methods and everything else.
386  *
387  ******************************************************************************/
388
389 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
390 {
391         union acpi_parse_object *op;
392         acpi_object_type object_type;
393         acpi_status status = AE_OK;
394
395         ACPI_FUNCTION_TRACE(ds_load1_end_op);
396
397         op = walk_state->op;
398         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
399                           walk_state));
400
401         /* We are only interested in opcodes that have an associated name */
402
403         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
404                 return_ACPI_STATUS(AE_OK);
405         }
406
407         /* Get the object type to determine if we should pop the scope */
408
409         object_type = walk_state->op_info->object_type;
410
411 #ifndef ACPI_NO_METHOD_EXECUTION
412         if (walk_state->op_info->flags & AML_FIELD) {
413                 /*
414                  * If we are executing a method, do not create any namespace objects
415                  * during the load phase, only during execution.
416                  */
417                 if (!walk_state->method_node) {
418                         if (walk_state->opcode == AML_FIELD_OP ||
419                             walk_state->opcode == AML_BANK_FIELD_OP ||
420                             walk_state->opcode == AML_INDEX_FIELD_OP) {
421                                 status =
422                                     acpi_ds_init_field_objects(op, walk_state);
423                         }
424                 }
425                 return_ACPI_STATUS(status);
426         }
427
428         /*
429          * If we are executing a method, do not create any namespace objects
430          * during the load phase, only during execution.
431          */
432         if (!walk_state->method_node) {
433                 if (op->common.aml_opcode == AML_REGION_OP) {
434                         status =
435                             acpi_ex_create_region(op->named.data,
436                                                   op->named.length,
437                                                   (acpi_adr_space_type)
438                                                   ((op->common.value.arg)->
439                                                    common.value.integer),
440                                                   walk_state);
441                         if (ACPI_FAILURE(status)) {
442                                 return_ACPI_STATUS(status);
443                         }
444                 }
445         }
446 #endif
447
448         if (op->common.aml_opcode == AML_NAME_OP) {
449
450                 /* For Name opcode, get the object type from the argument */
451
452                 if (op->common.value.arg) {
453                         object_type = (acpi_ps_get_opcode_info((op->common.
454                                                                 value.arg)->
455                                                                common.
456                                                                aml_opcode))->
457                             object_type;
458
459                         /* Set node type if we have a namespace node */
460
461                         if (op->common.node) {
462                                 op->common.node->type = (u8) object_type;
463                         }
464                 }
465         }
466
467         /*
468          * If we are executing a method, do not create any namespace objects
469          * during the load phase, only during execution.
470          */
471         if (!walk_state->method_node) {
472                 if (op->common.aml_opcode == AML_METHOD_OP) {
473                         /*
474                          * method_op pkg_length name_string method_flags term_list
475                          *
476                          * Note: We must create the method node/object pair as soon as we
477                          * see the method declaration.  This allows later pass1 parsing
478                          * of invocations of the method (need to know the number of
479                          * arguments.)
480                          */
481                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
482                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
483                                           walk_state, op, op->named.node));
484
485                         if (!acpi_ns_get_attached_object(op->named.node)) {
486                                 walk_state->operands[0] =
487                                     ACPI_CAST_PTR(void, op->named.node);
488                                 walk_state->num_operands = 1;
489
490                                 status =
491                                     acpi_ds_create_operands(walk_state,
492                                                             op->common.value.
493                                                             arg);
494                                 if (ACPI_SUCCESS(status)) {
495                                         status =
496                                             acpi_ex_create_method(op->named.
497                                                                   data,
498                                                                   op->named.
499                                                                   length,
500                                                                   walk_state);
501                                 }
502                                 walk_state->operands[0] = NULL;
503                                 walk_state->num_operands = 0;
504
505                                 if (ACPI_FAILURE(status)) {
506                                         return_ACPI_STATUS(status);
507                                 }
508                         }
509                 }
510         }
511
512         /* Pop the scope stack (only if loading a table) */
513
514         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
515                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
516                                   "(%s): Popping scope for Op %p\n",
517                                   acpi_ut_get_type_name(object_type), op));
518
519                 status = acpi_ds_scope_stack_pop(walk_state);
520         }
521
522         return_ACPI_STATUS(status);
523 }
524
525 /*******************************************************************************
526  *
527  * FUNCTION:    acpi_ds_load2_begin_op
528  *
529  * PARAMETERS:  walk_state      - Current state of the parse tree walk
530  *              out_op          - Wher to return op if a new one is created
531  *
532  * RETURN:      Status
533  *
534  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
535  *
536  ******************************************************************************/
537
538 acpi_status
539 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
540                        union acpi_parse_object **out_op)
541 {
542         union acpi_parse_object *op;
543         struct acpi_namespace_node *node;
544         acpi_status status;
545         acpi_object_type object_type;
546         char *buffer_ptr;
547
548         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
549
550         op = walk_state->op;
551         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
552                           walk_state));
553
554         if (op) {
555                 if ((walk_state->control_state) &&
556                     (walk_state->control_state->common.state ==
557                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
558
559                         /* We are executing a while loop outside of a method */
560
561                         status = acpi_ds_exec_begin_op(walk_state, out_op);
562                         return_ACPI_STATUS(status);
563                 }
564
565                 /* We only care about Namespace opcodes here */
566
567                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
568                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
569                     (!(walk_state->op_info->flags & AML_NAMED))) {
570 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
571                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
572                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
573
574                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
575                                                   "Begin/EXEC: %s (fl %8.8X)\n",
576                                                   walk_state->op_info->name,
577                                                   walk_state->op_info->flags));
578
579                                 /* Executing a type1 or type2 opcode outside of a method */
580
581                                 status =
582                                     acpi_ds_exec_begin_op(walk_state, out_op);
583                                 return_ACPI_STATUS(status);
584                         }
585 #endif
586                         return_ACPI_STATUS(AE_OK);
587                 }
588
589                 /* Get the name we are going to enter or lookup in the namespace */
590
591                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
592
593                         /* For Namepath op, get the path string */
594
595                         buffer_ptr = op->common.value.string;
596                         if (!buffer_ptr) {
597
598                                 /* No name, just exit */
599
600                                 return_ACPI_STATUS(AE_OK);
601                         }
602                 } else {
603                         /* Get name from the op */
604
605                         buffer_ptr = (char *)&op->named.name;
606                 }
607         } else {
608                 /* Get the namestring from the raw AML */
609
610                 buffer_ptr =
611                     acpi_ps_get_next_namestring(&walk_state->parser_state);
612         }
613
614         /* Map the opcode into an internal object type */
615
616         object_type = walk_state->op_info->object_type;
617
618         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
619                           "State=%p Op=%p Type=%X\n", walk_state, op,
620                           object_type));
621
622         switch (walk_state->opcode) {
623         case AML_FIELD_OP:
624         case AML_BANK_FIELD_OP:
625         case AML_INDEX_FIELD_OP:
626
627                 node = NULL;
628                 status = AE_OK;
629                 break;
630
631         case AML_INT_NAMEPATH_OP:
632
633                 /*
634                  * The name_path is an object reference to an existing object.
635                  * Don't enter the name into the namespace, but look it up
636                  * for use later.
637                  */
638                 status =
639                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
640                                    object_type, ACPI_IMODE_EXECUTE,
641                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
642                 break;
643
644         case AML_SCOPE_OP:
645
646                 /*
647                  * The Path is an object reference to an existing object.
648                  * Don't enter the name into the namespace, but look it up
649                  * for use later.
650                  */
651                 status =
652                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
653                                    object_type, ACPI_IMODE_EXECUTE,
654                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
655                 if (ACPI_FAILURE(status)) {
656 #ifdef ACPI_ASL_COMPILER
657                         if (status == AE_NOT_FOUND) {
658                                 status = AE_OK;
659                         } else {
660                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
661                         }
662 #else
663                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
664 #endif
665                         return_ACPI_STATUS(status);
666                 }
667                 /*
668                  * We must check to make sure that the target is
669                  * one of the opcodes that actually opens a scope
670                  */
671                 switch (node->type) {
672                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
673                 case ACPI_TYPE_DEVICE:
674                 case ACPI_TYPE_POWER:
675                 case ACPI_TYPE_PROCESSOR:
676                 case ACPI_TYPE_THERMAL:
677
678                         /* These are acceptable types */
679                         break;
680
681                 case ACPI_TYPE_INTEGER:
682                 case ACPI_TYPE_STRING:
683                 case ACPI_TYPE_BUFFER:
684
685                         /*
686                          * These types we will allow, but we will change the type.  This
687                          * enables some existing code of the form:
688                          *
689                          *  Name (DEB, 0)
690                          *  Scope (DEB) { ... }
691                          */
692
693                         ACPI_WARNING((AE_INFO,
694                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
695                                       buffer_ptr,
696                                       acpi_ut_get_type_name(node->type)));
697
698                         node->type = ACPI_TYPE_ANY;
699                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
700                         break;
701
702                 default:
703
704                         /* All other types are an error */
705
706                         ACPI_ERROR((AE_INFO,
707                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
708                                     acpi_ut_get_type_name(node->type),
709                                     buffer_ptr));
710
711                         return (AE_AML_OPERAND_TYPE);
712                 }
713                 break;
714
715         default:
716
717                 /* All other opcodes */
718
719                 if (op && op->common.node) {
720
721                         /* This op/node was previously entered into the namespace */
722
723                         node = op->common.node;
724
725                         if (acpi_ns_opens_scope(object_type)) {
726                                 status =
727                                     acpi_ds_scope_stack_push(node, object_type,
728                                                              walk_state);
729                                 if (ACPI_FAILURE(status)) {
730                                         return_ACPI_STATUS(status);
731                                 }
732
733                         }
734                         return_ACPI_STATUS(AE_OK);
735                 }
736
737                 /*
738                  * Enter the named type into the internal namespace.  We enter the name
739                  * as we go downward in the parse tree.  Any necessary subobjects that
740                  * involve arguments to the opcode must be created as we go back up the
741                  * parse tree later.
742                  *
743                  * Note: Name may already exist if we are executing a deferred opcode.
744                  */
745                 if (walk_state->deferred_node) {
746
747                         /* This name is already in the namespace, get the node */
748
749                         node = walk_state->deferred_node;
750                         status = AE_OK;
751                         break;
752                 }
753
754                 /* Add new entry into namespace */
755
756                 status =
757                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
758                                    object_type, ACPI_IMODE_LOAD_PASS2,
759                                    ACPI_NS_NO_UPSEARCH, walk_state, &(node));
760                 break;
761         }
762
763         if (ACPI_FAILURE(status)) {
764                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
765                 return_ACPI_STATUS(status);
766         }
767
768         if (!op) {
769
770                 /* Create a new op */
771
772                 op = acpi_ps_alloc_op(walk_state->opcode);
773                 if (!op) {
774                         return_ACPI_STATUS(AE_NO_MEMORY);
775                 }
776
777                 /* Initialize the new op */
778
779                 if (node) {
780                         op->named.name = node->name.integer;
781                 }
782                 *out_op = op;
783         }
784
785         /*
786          * Put the Node in the "op" object that the parser uses, so we
787          * can get it again quickly when this scope is closed
788          */
789         op->common.node = node;
790
791         return_ACPI_STATUS(status);
792 }
793
794 /*******************************************************************************
795  *
796  * FUNCTION:    acpi_ds_load2_end_op
797  *
798  * PARAMETERS:  walk_state      - Current state of the parse tree walk
799  *
800  * RETURN:      Status
801  *
802  * DESCRIPTION: Ascending callback used during the loading of the namespace,
803  *              both control methods and everything else.
804  *
805  ******************************************************************************/
806
807 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
808 {
809         union acpi_parse_object *op;
810         acpi_status status = AE_OK;
811         acpi_object_type object_type;
812         struct acpi_namespace_node *node;
813         union acpi_parse_object *arg;
814         struct acpi_namespace_node *new_node;
815 #ifndef ACPI_NO_METHOD_EXECUTION
816         u32 i;
817 #endif
818
819         ACPI_FUNCTION_TRACE(ds_load2_end_op);
820
821         op = walk_state->op;
822         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
823                           walk_state->op_info->name, op, walk_state));
824
825         /* Check if opcode had an associated namespace object */
826
827         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
828 #ifndef ACPI_NO_METHOD_EXECUTION
829 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
830                 /* No namespace object. Executable opcode? */
831
832                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
833                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
834                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
835                                           "End/EXEC:   %s (fl %8.8X)\n",
836                                           walk_state->op_info->name,
837                                           walk_state->op_info->flags));
838
839                         /* Executing a type1 or type2 opcode outside of a method */
840
841                         status = acpi_ds_exec_end_op(walk_state);
842                         return_ACPI_STATUS(status);
843                 }
844 #endif
845 #endif
846                 return_ACPI_STATUS(AE_OK);
847         }
848
849         if (op->common.aml_opcode == AML_SCOPE_OP) {
850                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
851                                   "Ending scope Op=%p State=%p\n", op,
852                                   walk_state));
853         }
854
855         object_type = walk_state->op_info->object_type;
856
857         /*
858          * Get the Node/name from the earlier lookup
859          * (It was saved in the *op structure)
860          */
861         node = op->common.node;
862
863         /*
864          * Put the Node on the object stack (Contains the ACPI Name of
865          * this object)
866          */
867         walk_state->operands[0] = (void *)node;
868         walk_state->num_operands = 1;
869
870         /* Pop the scope stack */
871
872         if (acpi_ns_opens_scope(object_type) &&
873             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
874                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
875                                   "(%s) Popping scope for Op %p\n",
876                                   acpi_ut_get_type_name(object_type), op));
877
878                 status = acpi_ds_scope_stack_pop(walk_state);
879                 if (ACPI_FAILURE(status)) {
880                         goto cleanup;
881                 }
882         }
883
884         /*
885          * Named operations are as follows:
886          *
887          * AML_ALIAS
888          * AML_BANKFIELD
889          * AML_CREATEBITFIELD
890          * AML_CREATEBYTEFIELD
891          * AML_CREATEDWORDFIELD
892          * AML_CREATEFIELD
893          * AML_CREATEQWORDFIELD
894          * AML_CREATEWORDFIELD
895          * AML_DATA_REGION
896          * AML_DEVICE
897          * AML_EVENT
898          * AML_FIELD
899          * AML_INDEXFIELD
900          * AML_METHOD
901          * AML_METHODCALL
902          * AML_MUTEX
903          * AML_NAME
904          * AML_NAMEDFIELD
905          * AML_OPREGION
906          * AML_POWERRES
907          * AML_PROCESSOR
908          * AML_SCOPE
909          * AML_THERMALZONE
910          */
911
912         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
913                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
914                           acpi_ps_get_opcode_name(op->common.aml_opcode),
915                           walk_state, op, node));
916
917         /* Decode the opcode */
918
919         arg = op->common.value.arg;
920
921         switch (walk_state->op_info->type) {
922 #ifndef ACPI_NO_METHOD_EXECUTION
923
924         case AML_TYPE_CREATE_FIELD:
925
926                 /*
927                  * Create the field object, but the field buffer and index must
928                  * be evaluated later during the execution phase
929                  */
930                 status = acpi_ds_create_buffer_field(op, walk_state);
931                 break;
932
933         case AML_TYPE_NAMED_FIELD:
934
935                 /*
936                  * If we are executing a method, initialize the field
937                  */
938                 if (walk_state->method_node) {
939                         status = acpi_ds_init_field_objects(op, walk_state);
940                 }
941
942                 switch (op->common.aml_opcode) {
943                 case AML_INDEX_FIELD_OP:
944
945                         status =
946                             acpi_ds_create_index_field(op,
947                                                        (acpi_handle) arg->
948                                                        common.node, walk_state);
949                         break;
950
951                 case AML_BANK_FIELD_OP:
952
953                         status =
954                             acpi_ds_create_bank_field(op, arg->common.node,
955                                                       walk_state);
956                         break;
957
958                 case AML_FIELD_OP:
959
960                         status =
961                             acpi_ds_create_field(op, arg->common.node,
962                                                  walk_state);
963                         break;
964
965                 default:
966                         /* All NAMED_FIELD opcodes must be handled above */
967                         break;
968                 }
969                 break;
970
971         case AML_TYPE_NAMED_SIMPLE:
972
973                 status = acpi_ds_create_operands(walk_state, arg);
974                 if (ACPI_FAILURE(status)) {
975                         goto cleanup;
976                 }
977
978                 switch (op->common.aml_opcode) {
979                 case AML_PROCESSOR_OP:
980
981                         status = acpi_ex_create_processor(walk_state);
982                         break;
983
984                 case AML_POWER_RES_OP:
985
986                         status = acpi_ex_create_power_resource(walk_state);
987                         break;
988
989                 case AML_MUTEX_OP:
990
991                         status = acpi_ex_create_mutex(walk_state);
992                         break;
993
994                 case AML_EVENT_OP:
995
996                         status = acpi_ex_create_event(walk_state);
997                         break;
998
999                 case AML_DATA_REGION_OP:
1000
1001                         status = acpi_ex_create_table_region(walk_state);
1002                         break;
1003
1004                 case AML_ALIAS_OP:
1005
1006                         status = acpi_ex_create_alias(walk_state);
1007                         break;
1008
1009                 default:
1010                         /* Unknown opcode */
1011
1012                         status = AE_OK;
1013                         goto cleanup;
1014                 }
1015
1016                 /* Delete operands */
1017
1018                 for (i = 1; i < walk_state->num_operands; i++) {
1019                         acpi_ut_remove_reference(walk_state->operands[i]);
1020                         walk_state->operands[i] = NULL;
1021                 }
1022
1023                 break;
1024 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1025
1026         case AML_TYPE_NAMED_COMPLEX:
1027
1028                 switch (op->common.aml_opcode) {
1029 #ifndef ACPI_NO_METHOD_EXECUTION
1030                 case AML_REGION_OP:
1031
1032                         /*
1033                          * If we are executing a method, initialize the region
1034                          */
1035                         if (walk_state->method_node) {
1036                                 status =
1037                                     acpi_ex_create_region(op->named.data,
1038                                                           op->named.length,
1039                                                           (acpi_adr_space_type)
1040                                                           ((op->common.value.
1041                                                             arg)->common.value.
1042                                                            integer),
1043                                                           walk_state);
1044                                 if (ACPI_FAILURE(status)) {
1045                                         return (status);
1046                                 }
1047                         }
1048
1049                         /*
1050                          * The op_region is not fully parsed at this time. Only valid
1051                          * argument is the space_id. (We must save the address of the
1052                          * AML of the address and length operands)
1053                          */
1054                         /*
1055                          * If we have a valid region, initialize it
1056                          * Namespace is NOT locked at this point.
1057                          */
1058                         status =
1059                             acpi_ev_initialize_region
1060                             (acpi_ns_get_attached_object(node), FALSE);
1061                         if (ACPI_FAILURE(status)) {
1062                                 /*
1063                                  *  If AE_NOT_EXIST is returned, it is not fatal
1064                                  *  because many regions get created before a handler
1065                                  *  is installed for said region.
1066                                  */
1067                                 if (AE_NOT_EXIST == status) {
1068                                         status = AE_OK;
1069                                 }
1070                         }
1071                         break;
1072
1073                 case AML_NAME_OP:
1074
1075                         status = acpi_ds_create_node(walk_state, node, op);
1076                         break;
1077
1078                 case AML_METHOD_OP:
1079                         /*
1080                          * method_op pkg_length name_string method_flags term_list
1081                          *
1082                          * Note: We must create the method node/object pair as soon as we
1083                          * see the method declaration.  This allows later pass1 parsing
1084                          * of invocations of the method (need to know the number of
1085                          * arguments.)
1086                          */
1087                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1088                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1089                                           walk_state, op, op->named.node));
1090
1091                         if (!acpi_ns_get_attached_object(op->named.node)) {
1092                                 walk_state->operands[0] =
1093                                     ACPI_CAST_PTR(void, op->named.node);
1094                                 walk_state->num_operands = 1;
1095
1096                                 status =
1097                                     acpi_ds_create_operands(walk_state,
1098                                                             op->common.value.
1099                                                             arg);
1100                                 if (ACPI_SUCCESS(status)) {
1101                                         status =
1102                                             acpi_ex_create_method(op->named.
1103                                                                   data,
1104                                                                   op->named.
1105                                                                   length,
1106                                                                   walk_state);
1107                                 }
1108                                 walk_state->operands[0] = NULL;
1109                                 walk_state->num_operands = 0;
1110
1111                                 if (ACPI_FAILURE(status)) {
1112                                         return_ACPI_STATUS(status);
1113                                 }
1114                         }
1115                         break;
1116
1117 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1118
1119                 default:
1120                         /* All NAMED_COMPLEX opcodes must be handled above */
1121                         break;
1122                 }
1123                 break;
1124
1125         case AML_CLASS_INTERNAL:
1126
1127                 /* case AML_INT_NAMEPATH_OP: */
1128                 break;
1129
1130         case AML_CLASS_METHOD_CALL:
1131
1132                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1133                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1134                                   walk_state, op, node));
1135
1136                 /*
1137                  * Lookup the method name and save the Node
1138                  */
1139                 status =
1140                     acpi_ns_lookup(walk_state->scope_info,
1141                                    arg->common.value.string, ACPI_TYPE_ANY,
1142                                    ACPI_IMODE_LOAD_PASS2,
1143                                    ACPI_NS_SEARCH_PARENT |
1144                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1145                                    &(new_node));
1146                 if (ACPI_SUCCESS(status)) {
1147                         /*
1148                          * Make sure that what we found is indeed a method
1149                          * We didn't search for a method on purpose, to see if the name
1150                          * would resolve
1151                          */
1152                         if (new_node->type != ACPI_TYPE_METHOD) {
1153                                 status = AE_AML_OPERAND_TYPE;
1154                         }
1155
1156                         /* We could put the returned object (Node) on the object stack for
1157                          * later, but for now, we will put it in the "op" object that the
1158                          * parser uses, so we can get it again at the end of this scope
1159                          */
1160                         op->common.node = new_node;
1161                 } else {
1162                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1163                 }
1164                 break;
1165
1166         default:
1167                 break;
1168         }
1169
1170       cleanup:
1171
1172         /* Remove the Node pushed at the very beginning */
1173
1174         walk_state->operands[0] = NULL;
1175         walk_state->num_operands = 0;
1176         return_ACPI_STATUS(status);
1177 }