Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6.git] / 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);
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                         /* 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                         ACPI_ERROR_NAMESPACE(path, status);
306                         return_ACPI_STATUS(status);
307                 }
308                 break;
309         }
310
311         /* Common exit */
312
313         if (!op) {
314                 /* Create a new op */
315
316                 op = acpi_ps_alloc_op(walk_state->opcode);
317                 if (!op) {
318                         return_ACPI_STATUS(AE_NO_MEMORY);
319                 }
320         }
321
322         /* Initialize the op */
323
324 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
325         op->named.path = ACPI_CAST_PTR(u8, path);
326 #endif
327
328         if (node) {
329                 /*
330                  * Put the Node in the "op" object that the parser uses, so we
331                  * can get it again quickly when this scope is closed
332                  */
333                 op->common.node = node;
334                 op->named.name = node->name.integer;
335         }
336
337         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
338                            op);
339         *out_op = op;
340         return_ACPI_STATUS(status);
341 }
342
343 /*******************************************************************************
344  *
345  * FUNCTION:    acpi_ds_load1_end_op
346  *
347  * PARAMETERS:  walk_state      - Current state of the parse tree walk
348  *
349  * RETURN:      Status
350  *
351  * DESCRIPTION: Ascending callback used during the loading of the namespace,
352  *              both control methods and everything else.
353  *
354  ******************************************************************************/
355
356 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
357 {
358         union acpi_parse_object *op;
359         acpi_object_type object_type;
360         acpi_status status = AE_OK;
361
362         ACPI_FUNCTION_TRACE("ds_load1_end_op");
363
364         op = walk_state->op;
365         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
366                           walk_state));
367
368         /* We are only interested in opcodes that have an associated name */
369
370         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
371                 return_ACPI_STATUS(AE_OK);
372         }
373
374         /* Get the object type to determine if we should pop the scope */
375
376         object_type = walk_state->op_info->object_type;
377
378 #ifndef ACPI_NO_METHOD_EXECUTION
379         if (walk_state->op_info->flags & AML_FIELD) {
380                 /*
381                  * If we are executing a method, do not create any namespace objects
382                  * during the load phase, only during execution.
383                  */
384                 if (!walk_state->method_node) {
385                         if (walk_state->opcode == AML_FIELD_OP ||
386                             walk_state->opcode == AML_BANK_FIELD_OP ||
387                             walk_state->opcode == AML_INDEX_FIELD_OP) {
388                                 status =
389                                     acpi_ds_init_field_objects(op, walk_state);
390                         }
391                 }
392                 return_ACPI_STATUS(status);
393         }
394
395         /*
396          * If we are executing a method, do not create any namespace objects
397          * during the load phase, only during execution.
398          */
399         if (!walk_state->method_node) {
400                 if (op->common.aml_opcode == AML_REGION_OP) {
401                         status =
402                             acpi_ex_create_region(op->named.data,
403                                                   op->named.length,
404                                                   (acpi_adr_space_type)
405                                                   ((op->common.value.arg)->
406                                                    common.value.integer),
407                                                   walk_state);
408                         if (ACPI_FAILURE(status)) {
409                                 return_ACPI_STATUS(status);
410                         }
411                 }
412         }
413 #endif
414
415         if (op->common.aml_opcode == AML_NAME_OP) {
416                 /* For Name opcode, get the object type from the argument */
417
418                 if (op->common.value.arg) {
419                         object_type = (acpi_ps_get_opcode_info((op->common.
420                                                                 value.arg)->
421                                                                common.
422                                                                aml_opcode))->
423                             object_type;
424
425                         /* Set node type if we have a namespace node */
426
427                         if (op->common.node) {
428                                 op->common.node->type = (u8) object_type;
429                         }
430                 }
431         }
432
433         /*
434          * If we are executing a method, do not create any namespace objects
435          * during the load phase, only during execution.
436          */
437         if (!walk_state->method_node) {
438                 if (op->common.aml_opcode == AML_METHOD_OP) {
439                         /*
440                          * method_op pkg_length name_string method_flags term_list
441                          *
442                          * Note: We must create the method node/object pair as soon as we
443                          * see the method declaration.  This allows later pass1 parsing
444                          * of invocations of the method (need to know the number of
445                          * arguments.)
446                          */
447                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
448                                           "LOADING-Method: State=%p Op=%p named_obj=%p\n",
449                                           walk_state, op, op->named.node));
450
451                         if (!acpi_ns_get_attached_object(op->named.node)) {
452                                 walk_state->operands[0] =
453                                     ACPI_CAST_PTR(void, op->named.node);
454                                 walk_state->num_operands = 1;
455
456                                 status =
457                                     acpi_ds_create_operands(walk_state,
458                                                             op->common.value.
459                                                             arg);
460                                 if (ACPI_SUCCESS(status)) {
461                                         status =
462                                             acpi_ex_create_method(op->named.
463                                                                   data,
464                                                                   op->named.
465                                                                   length,
466                                                                   walk_state);
467                                 }
468                                 walk_state->operands[0] = NULL;
469                                 walk_state->num_operands = 0;
470
471                                 if (ACPI_FAILURE(status)) {
472                                         return_ACPI_STATUS(status);
473                                 }
474                         }
475                 }
476         }
477
478         /* Pop the scope stack (only if loading a table) */
479
480         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
481                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
482                                   "(%s): Popping scope for Op %p\n",
483                                   acpi_ut_get_type_name(object_type), op));
484
485                 status = acpi_ds_scope_stack_pop(walk_state);
486         }
487
488         return_ACPI_STATUS(status);
489 }
490
491 /*******************************************************************************
492  *
493  * FUNCTION:    acpi_ds_load2_begin_op
494  *
495  * PARAMETERS:  walk_state      - Current state of the parse tree walk
496  *              out_op          - Wher to return op if a new one is created
497  *
498  * RETURN:      Status
499  *
500  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
501  *
502  ******************************************************************************/
503
504 acpi_status
505 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
506                        union acpi_parse_object **out_op)
507 {
508         union acpi_parse_object *op;
509         struct acpi_namespace_node *node;
510         acpi_status status;
511         acpi_object_type object_type;
512         char *buffer_ptr;
513
514         ACPI_FUNCTION_TRACE("ds_load2_begin_op");
515
516         op = walk_state->op;
517         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
518                           walk_state));
519
520         if (op) {
521                 if ((walk_state->control_state) &&
522                     (walk_state->control_state->common.state ==
523                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
524                         /* We are executing a while loop outside of a method */
525
526                         status = acpi_ds_exec_begin_op(walk_state, out_op);
527                         return_ACPI_STATUS(status);
528                 }
529
530                 /* We only care about Namespace opcodes here */
531
532                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
533                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
534                     (!(walk_state->op_info->flags & AML_NAMED))) {
535 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
536                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
537                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
538
539                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
540                                                   "Begin/EXEC: %s (fl %8.8X)\n",
541                                                   walk_state->op_info->name,
542                                                   walk_state->op_info->flags));
543
544                                 /* Executing a type1 or type2 opcode outside of a method */
545
546                                 status =
547                                     acpi_ds_exec_begin_op(walk_state, out_op);
548                                 return_ACPI_STATUS(status);
549                         }
550 #endif
551                         return_ACPI_STATUS(AE_OK);
552                 }
553
554                 /* Get the name we are going to enter or lookup in the namespace */
555
556                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
557                         /* For Namepath op, get the path string */
558
559                         buffer_ptr = op->common.value.string;
560                         if (!buffer_ptr) {
561                                 /* No name, just exit */
562
563                                 return_ACPI_STATUS(AE_OK);
564                         }
565                 } else {
566                         /* Get name from the op */
567
568                         buffer_ptr = (char *)&op->named.name;
569                 }
570         } else {
571                 /* Get the namestring from the raw AML */
572
573                 buffer_ptr =
574                     acpi_ps_get_next_namestring(&walk_state->parser_state);
575         }
576
577         /* Map the opcode into an internal object type */
578
579         object_type = walk_state->op_info->object_type;
580
581         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
582                           "State=%p Op=%p Type=%X\n", walk_state, op,
583                           object_type));
584
585         switch (walk_state->opcode) {
586         case AML_FIELD_OP:
587         case AML_BANK_FIELD_OP:
588         case AML_INDEX_FIELD_OP:
589
590                 node = NULL;
591                 status = AE_OK;
592                 break;
593
594         case AML_INT_NAMEPATH_OP:
595
596                 /*
597                  * The name_path is an object reference to an existing object.
598                  * Don't enter the name into the namespace, but look it up
599                  * for use later.
600                  */
601                 status =
602                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
603                                    object_type, ACPI_IMODE_EXECUTE,
604                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
605                 break;
606
607         case AML_SCOPE_OP:
608
609                 /*
610                  * The Path is an object reference to an existing object.
611                  * Don't enter the name into the namespace, but look it up
612                  * for use later.
613                  */
614                 status =
615                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
616                                    object_type, ACPI_IMODE_EXECUTE,
617                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
618                 if (ACPI_FAILURE(status)) {
619 #ifdef ACPI_ASL_COMPILER
620                         if (status == AE_NOT_FOUND) {
621                                 status = AE_OK;
622                         } else {
623                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
624                         }
625 #else
626                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
627 #endif
628                         return_ACPI_STATUS(status);
629                 }
630                 /*
631                  * We must check to make sure that the target is
632                  * one of the opcodes that actually opens a scope
633                  */
634                 switch (node->type) {
635                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
636                 case ACPI_TYPE_DEVICE:
637                 case ACPI_TYPE_POWER:
638                 case ACPI_TYPE_PROCESSOR:
639                 case ACPI_TYPE_THERMAL:
640
641                         /* These are acceptable types */
642                         break;
643
644                 case ACPI_TYPE_INTEGER:
645                 case ACPI_TYPE_STRING:
646                 case ACPI_TYPE_BUFFER:
647
648                         /*
649                          * These types we will allow, but we will change the type.  This
650                          * enables some existing code of the form:
651                          *
652                          *  Name (DEB, 0)
653                          *  Scope (DEB) { ... }
654                          */
655
656                         ACPI_WARNING((AE_INFO,
657                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
658                                       buffer_ptr,
659                                       acpi_ut_get_type_name(node->type)));
660
661                         node->type = ACPI_TYPE_ANY;
662                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
663                         break;
664
665                 default:
666
667                         /* All other types are an error */
668
669                         ACPI_ERROR((AE_INFO,
670                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
671                                     acpi_ut_get_type_name(node->type),
672                                     buffer_ptr));
673
674                         return (AE_AML_OPERAND_TYPE);
675                 }
676                 break;
677
678         default:
679
680                 /* All other opcodes */
681
682                 if (op && op->common.node) {
683                         /* This op/node was previously entered into the namespace */
684
685                         node = op->common.node;
686
687                         if (acpi_ns_opens_scope(object_type)) {
688                                 status =
689                                     acpi_ds_scope_stack_push(node, object_type,
690                                                              walk_state);
691                                 if (ACPI_FAILURE(status)) {
692                                         return_ACPI_STATUS(status);
693                                 }
694
695                         }
696                         return_ACPI_STATUS(AE_OK);
697                 }
698
699                 /*
700                  * Enter the named type into the internal namespace.  We enter the name
701                  * as we go downward in the parse tree.  Any necessary subobjects that
702                  * involve arguments to the opcode must be created as we go back up the
703                  * parse tree later.
704                  *
705                  * Note: Name may already exist if we are executing a deferred opcode.
706                  */
707                 if (walk_state->deferred_node) {
708                         /* This name is already in the namespace, get the node */
709
710                         node = walk_state->deferred_node;
711                         status = AE_OK;
712                         break;
713                 }
714
715                 /* Add new entry into namespace */
716
717                 status =
718                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
719                                    object_type, ACPI_IMODE_LOAD_PASS2,
720                                    ACPI_NS_NO_UPSEARCH, walk_state, &(node));
721                 break;
722         }
723
724         if (ACPI_FAILURE(status)) {
725                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
726                 return_ACPI_STATUS(status);
727         }
728
729         if (!op) {
730                 /* Create a new op */
731
732                 op = acpi_ps_alloc_op(walk_state->opcode);
733                 if (!op) {
734                         return_ACPI_STATUS(AE_NO_MEMORY);
735                 }
736
737                 /* Initialize the new op */
738
739                 if (node) {
740                         op->named.name = node->name.integer;
741                 }
742                 *out_op = op;
743         }
744
745         /*
746          * Put the Node in the "op" object that the parser uses, so we
747          * can get it again quickly when this scope is closed
748          */
749         op->common.node = node;
750
751         return_ACPI_STATUS(status);
752 }
753
754 /*******************************************************************************
755  *
756  * FUNCTION:    acpi_ds_load2_end_op
757  *
758  * PARAMETERS:  walk_state      - Current state of the parse tree walk
759  *
760  * RETURN:      Status
761  *
762  * DESCRIPTION: Ascending callback used during the loading of the namespace,
763  *              both control methods and everything else.
764  *
765  ******************************************************************************/
766
767 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
768 {
769         union acpi_parse_object *op;
770         acpi_status status = AE_OK;
771         acpi_object_type object_type;
772         struct acpi_namespace_node *node;
773         union acpi_parse_object *arg;
774         struct acpi_namespace_node *new_node;
775 #ifndef ACPI_NO_METHOD_EXECUTION
776         u32 i;
777 #endif
778
779         ACPI_FUNCTION_TRACE("ds_load2_end_op");
780
781         op = walk_state->op;
782         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
783                           walk_state->op_info->name, op, walk_state));
784
785         /* Check if opcode had an associated namespace object */
786
787         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
788 #ifndef ACPI_NO_METHOD_EXECUTION
789 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
790                 /* No namespace object. Executable opcode? */
791
792                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
793                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
794                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
795                                           "End/EXEC:   %s (fl %8.8X)\n",
796                                           walk_state->op_info->name,
797                                           walk_state->op_info->flags));
798
799                         /* Executing a type1 or type2 opcode outside of a method */
800
801                         status = acpi_ds_exec_end_op(walk_state);
802                         return_ACPI_STATUS(status);
803                 }
804 #endif
805 #endif
806                 return_ACPI_STATUS(AE_OK);
807         }
808
809         if (op->common.aml_opcode == AML_SCOPE_OP) {
810                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
811                                   "Ending scope Op=%p State=%p\n", op,
812                                   walk_state));
813         }
814
815         object_type = walk_state->op_info->object_type;
816
817         /*
818          * Get the Node/name from the earlier lookup
819          * (It was saved in the *op structure)
820          */
821         node = op->common.node;
822
823         /*
824          * Put the Node on the object stack (Contains the ACPI Name of
825          * this object)
826          */
827         walk_state->operands[0] = (void *)node;
828         walk_state->num_operands = 1;
829
830         /* Pop the scope stack */
831
832         if (acpi_ns_opens_scope(object_type) &&
833             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
834                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
835                                   "(%s) Popping scope for Op %p\n",
836                                   acpi_ut_get_type_name(object_type), op));
837
838                 status = acpi_ds_scope_stack_pop(walk_state);
839                 if (ACPI_FAILURE(status)) {
840                         goto cleanup;
841                 }
842         }
843
844         /*
845          * Named operations are as follows:
846          *
847          * AML_ALIAS
848          * AML_BANKFIELD
849          * AML_CREATEBITFIELD
850          * AML_CREATEBYTEFIELD
851          * AML_CREATEDWORDFIELD
852          * AML_CREATEFIELD
853          * AML_CREATEQWORDFIELD
854          * AML_CREATEWORDFIELD
855          * AML_DATA_REGION
856          * AML_DEVICE
857          * AML_EVENT
858          * AML_FIELD
859          * AML_INDEXFIELD
860          * AML_METHOD
861          * AML_METHODCALL
862          * AML_MUTEX
863          * AML_NAME
864          * AML_NAMEDFIELD
865          * AML_OPREGION
866          * AML_POWERRES
867          * AML_PROCESSOR
868          * AML_SCOPE
869          * AML_THERMALZONE
870          */
871
872         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
873                           "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
874                           acpi_ps_get_opcode_name(op->common.aml_opcode),
875                           walk_state, op, node));
876
877         /* Decode the opcode */
878
879         arg = op->common.value.arg;
880
881         switch (walk_state->op_info->type) {
882 #ifndef ACPI_NO_METHOD_EXECUTION
883
884         case AML_TYPE_CREATE_FIELD:
885
886                 /*
887                  * Create the field object, but the field buffer and index must
888                  * be evaluated later during the execution phase
889                  */
890                 status = acpi_ds_create_buffer_field(op, walk_state);
891                 break;
892
893         case AML_TYPE_NAMED_FIELD:
894
895                 /*
896                  * If we are executing a method, initialize the field
897                  */
898                 if (walk_state->method_node) {
899                         status = acpi_ds_init_field_objects(op, walk_state);
900                 }
901
902                 switch (op->common.aml_opcode) {
903                 case AML_INDEX_FIELD_OP:
904
905                         status =
906                             acpi_ds_create_index_field(op,
907                                                        (acpi_handle) arg->
908                                                        common.node, walk_state);
909                         break;
910
911                 case AML_BANK_FIELD_OP:
912
913                         status =
914                             acpi_ds_create_bank_field(op, arg->common.node,
915                                                       walk_state);
916                         break;
917
918                 case AML_FIELD_OP:
919
920                         status =
921                             acpi_ds_create_field(op, arg->common.node,
922                                                  walk_state);
923                         break;
924
925                 default:
926                         /* All NAMED_FIELD opcodes must be handled above */
927                         break;
928                 }
929                 break;
930
931         case AML_TYPE_NAMED_SIMPLE:
932
933                 status = acpi_ds_create_operands(walk_state, arg);
934                 if (ACPI_FAILURE(status)) {
935                         goto cleanup;
936                 }
937
938                 switch (op->common.aml_opcode) {
939                 case AML_PROCESSOR_OP:
940
941                         status = acpi_ex_create_processor(walk_state);
942                         break;
943
944                 case AML_POWER_RES_OP:
945
946                         status = acpi_ex_create_power_resource(walk_state);
947                         break;
948
949                 case AML_MUTEX_OP:
950
951                         status = acpi_ex_create_mutex(walk_state);
952                         break;
953
954                 case AML_EVENT_OP:
955
956                         status = acpi_ex_create_event(walk_state);
957                         break;
958
959                 case AML_DATA_REGION_OP:
960
961                         status = acpi_ex_create_table_region(walk_state);
962                         break;
963
964                 case AML_ALIAS_OP:
965
966                         status = acpi_ex_create_alias(walk_state);
967                         break;
968
969                 default:
970                         /* Unknown opcode */
971
972                         status = AE_OK;
973                         goto cleanup;
974                 }
975
976                 /* Delete operands */
977
978                 for (i = 1; i < walk_state->num_operands; i++) {
979                         acpi_ut_remove_reference(walk_state->operands[i]);
980                         walk_state->operands[i] = NULL;
981                 }
982
983                 break;
984 #endif                          /* ACPI_NO_METHOD_EXECUTION */
985
986         case AML_TYPE_NAMED_COMPLEX:
987
988                 switch (op->common.aml_opcode) {
989 #ifndef ACPI_NO_METHOD_EXECUTION
990                 case AML_REGION_OP:
991
992                         /*
993                          * If we are executing a method, initialize the region
994                          */
995                         if (walk_state->method_node) {
996                                 status =
997                                     acpi_ex_create_region(op->named.data,
998                                                           op->named.length,
999                                                           (acpi_adr_space_type)
1000                                                           ((op->common.value.
1001                                                             arg)->common.value.
1002                                                            integer),
1003                                                           walk_state);
1004                                 if (ACPI_FAILURE(status)) {
1005                                         return (status);
1006                                 }
1007                         }
1008
1009                         /*
1010                          * The op_region is not fully parsed at this time. Only valid
1011                          * argument is the space_id. (We must save the address of the
1012                          * AML of the address and length operands)
1013                          */
1014                         /*
1015                          * If we have a valid region, initialize it
1016                          * Namespace is NOT locked at this point.
1017                          */
1018                         status =
1019                             acpi_ev_initialize_region
1020                             (acpi_ns_get_attached_object(node), FALSE);
1021                         if (ACPI_FAILURE(status)) {
1022                                 /*
1023                                  *  If AE_NOT_EXIST is returned, it is not fatal
1024                                  *  because many regions get created before a handler
1025                                  *  is installed for said region.
1026                                  */
1027                                 if (AE_NOT_EXIST == status) {
1028                                         status = AE_OK;
1029                                 }
1030                         }
1031                         break;
1032
1033                 case AML_NAME_OP:
1034
1035                         status = acpi_ds_create_node(walk_state, node, op);
1036                         break;
1037
1038                 case AML_METHOD_OP:
1039                         /*
1040                          * method_op pkg_length name_string method_flags term_list
1041                          *
1042                          * Note: We must create the method node/object pair as soon as we
1043                          * see the method declaration.  This allows later pass1 parsing
1044                          * of invocations of the method (need to know the number of
1045                          * arguments.)
1046                          */
1047                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1048                                           "LOADING-Method: State=%p Op=%p named_obj=%p\n",
1049                                           walk_state, op, op->named.node));
1050
1051                         if (!acpi_ns_get_attached_object(op->named.node)) {
1052                                 walk_state->operands[0] =
1053                                     ACPI_CAST_PTR(void, op->named.node);
1054                                 walk_state->num_operands = 1;
1055
1056                                 status =
1057                                     acpi_ds_create_operands(walk_state,
1058                                                             op->common.value.
1059                                                             arg);
1060                                 if (ACPI_SUCCESS(status)) {
1061                                         status =
1062                                             acpi_ex_create_method(op->named.
1063                                                                   data,
1064                                                                   op->named.
1065                                                                   length,
1066                                                                   walk_state);
1067                                 }
1068                                 walk_state->operands[0] = NULL;
1069                                 walk_state->num_operands = 0;
1070
1071                                 if (ACPI_FAILURE(status)) {
1072                                         return_ACPI_STATUS(status);
1073                                 }
1074                         }
1075                         break;
1076
1077 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1078
1079                 default:
1080                         /* All NAMED_COMPLEX opcodes must be handled above */
1081                         break;
1082                 }
1083                 break;
1084
1085         case AML_CLASS_INTERNAL:
1086
1087                 /* case AML_INT_NAMEPATH_OP: */
1088                 break;
1089
1090         case AML_CLASS_METHOD_CALL:
1091
1092                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1093                                   "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
1094                                   walk_state, op, node));
1095
1096                 /*
1097                  * Lookup the method name and save the Node
1098                  */
1099                 status =
1100                     acpi_ns_lookup(walk_state->scope_info,
1101                                    arg->common.value.string, ACPI_TYPE_ANY,
1102                                    ACPI_IMODE_LOAD_PASS2,
1103                                    ACPI_NS_SEARCH_PARENT |
1104                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1105                                    &(new_node));
1106                 if (ACPI_SUCCESS(status)) {
1107
1108                         /*
1109                          * Make sure that what we found is indeed a method
1110                          * We didn't search for a method on purpose, to see if the name
1111                          * would resolve
1112                          */
1113                         if (new_node->type != ACPI_TYPE_METHOD) {
1114                                 status = AE_AML_OPERAND_TYPE;
1115                         }
1116
1117                         /* We could put the returned object (Node) on the object stack for
1118                          * later, but for now, we will put it in the "op" object that the
1119                          * parser uses, so we can get it again at the end of this scope
1120                          */
1121                         op->common.node = new_node;
1122                 } else {
1123                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1124                 }
1125                 break;
1126
1127         default:
1128                 break;
1129         }
1130
1131       cleanup:
1132
1133         /* Remove the Node pushed at the very beginning */
1134
1135         walk_state->operands[0] = NULL;
1136         walk_state->num_operands = 0;
1137         return_ACPI_STATUS(status);
1138 }