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net: move procfs code to net/core/net-procfs.c
[linux/fpc-iii.git] / drivers / acpi / acpica / dswload.c
blob557510084c7aca459fb24ace485dd89c98aa26bc
1 /******************************************************************************
2 *
3 * Module Name: dswload - Dispatcher first pass namespace load callbacks
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2012, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acdispat.h"
49 #include "acinterp.h"
50 #include "acnamesp.h"
51
52 #ifdef ACPI_ASL_COMPILER
53 #include <acpi/acdisasm.h>
54 #endif
55
56 #define _COMPONENT ACPI_DISPATCHER
57 ACPI_MODULE_NAME("dswload")
58
59 /*******************************************************************************
60 *
61 * FUNCTION: acpi_ds_init_callbacks
62 *
63 * PARAMETERS: walk_state - Current state of the parse tree walk
64 * pass_number - 1, 2, or 3
65 *
66 * RETURN: Status
67 *
68 * DESCRIPTION: Init walk state callbacks
69 *
70 ******************************************************************************/
71 acpi_status
72 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
73 {
74
75 switch (pass_number) {
76 case 1:
77 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
78 ACPI_PARSE_DELETE_TREE;
79 walk_state->descending_callback = acpi_ds_load1_begin_op;
80 walk_state->ascending_callback = acpi_ds_load1_end_op;
81 break;
82
83 case 2:
84 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
85 ACPI_PARSE_DELETE_TREE;
86 walk_state->descending_callback = acpi_ds_load2_begin_op;
87 walk_state->ascending_callback = acpi_ds_load2_end_op;
88 break;
89
90 case 3:
91 #ifndef ACPI_NO_METHOD_EXECUTION
92 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
93 ACPI_PARSE_DELETE_TREE;
94 walk_state->descending_callback = acpi_ds_exec_begin_op;
95 walk_state->ascending_callback = acpi_ds_exec_end_op;
96 #endif
97 break;
98
99 default:
100 return (AE_BAD_PARAMETER);
101 }
102
103 return (AE_OK);
104 }
105
106 /*******************************************************************************
107 *
108 * FUNCTION: acpi_ds_load1_begin_op
109 *
110 * PARAMETERS: walk_state - Current state of the parse tree walk
111 * out_op - Where to return op if a new one is created
112 *
113 * RETURN: Status
114 *
115 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
116 *
117 ******************************************************************************/
118
119 acpi_status
120 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
121 union acpi_parse_object ** out_op)
122 {
123 union acpi_parse_object *op;
124 struct acpi_namespace_node *node;
125 acpi_status status;
126 acpi_object_type object_type;
127 char *path;
128 u32 flags;
129
130 ACPI_FUNCTION_TRACE(ds_load1_begin_op);
131
132 op = walk_state->op;
133 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
134 walk_state));
135
136 /* We are only interested in opcodes that have an associated name */
137
138 if (op) {
139 if (!(walk_state->op_info->flags & AML_NAMED)) {
140 *out_op = op;
141 return_ACPI_STATUS(AE_OK);
142 }
143
144 /* Check if this object has already been installed in the namespace */
145
146 if (op->common.node) {
147 *out_op = op;
148 return_ACPI_STATUS(AE_OK);
149 }
150 }
151
152 path = acpi_ps_get_next_namestring(&walk_state->parser_state);
153
154 /* Map the raw opcode into an internal object type */
155
156 object_type = walk_state->op_info->object_type;
157
158 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
159 "State=%p Op=%p [%s]\n", walk_state, op,
160 acpi_ut_get_type_name(object_type)));
161
162 switch (walk_state->opcode) {
163 case AML_SCOPE_OP:
164
165 /*
166 * The target name of the Scope() operator must exist at this point so
167 * that we can actually open the scope to enter new names underneath it.
168 * Allow search-to-root for single namesegs.
169 */
170 status =
171 acpi_ns_lookup(walk_state->scope_info, path, object_type,
172 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
173 walk_state, &(node));
174 #ifdef ACPI_ASL_COMPILER
175 if (status == AE_NOT_FOUND) {
176 /*
177 * Table disassembly:
178 * Target of Scope() not found. Generate an External for it, and
179 * insert the name into the namespace.
180 */
181 acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
182 status =
183 acpi_ns_lookup(walk_state->scope_info, path,
184 object_type, ACPI_IMODE_LOAD_PASS1,
185 ACPI_NS_SEARCH_PARENT, walk_state,
186 &node);
187 }
188 #endif
189 if (ACPI_FAILURE(status)) {
190 ACPI_ERROR_NAMESPACE(path, status);
191 return_ACPI_STATUS(status);
192 }
193
194 /*
195 * Check to make sure that the target is
196 * one of the opcodes that actually opens a scope
197 */
198 switch (node->type) {
199 case ACPI_TYPE_ANY:
200 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
201 case ACPI_TYPE_DEVICE:
202 case ACPI_TYPE_POWER:
203 case ACPI_TYPE_PROCESSOR:
204 case ACPI_TYPE_THERMAL:
205
206 /* These are acceptable types */
207 break;
208
209 case ACPI_TYPE_INTEGER:
210 case ACPI_TYPE_STRING:
211 case ACPI_TYPE_BUFFER:
212
213 /*
214 * These types we will allow, but we will change the type.
215 * This enables some existing code of the form:
216 *
217 * Name (DEB, 0)
218 * Scope (DEB) { ... }
219 *
220 * Note: silently change the type here. On the second pass,
221 * we will report a warning
222 */
223 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
224 "Type override - [%4.4s] had invalid type (%s) "
225 "for Scope operator, changed to type ANY\n",
226 acpi_ut_get_node_name(node),
227 acpi_ut_get_type_name(node->type)));
228
229 node->type = ACPI_TYPE_ANY;
230 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
231 break;
232
233 case ACPI_TYPE_METHOD:
234
235 /*
236 * Allow scope change to root during execution of module-level
237 * code. Root is typed METHOD during this time.
238 */
239 if ((node == acpi_gbl_root_node) &&
240 (walk_state->
241 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
242 break;
243 }
244
245 /*lint -fallthrough */
246
247 default:
248
249 /* All other types are an error */
250
251 ACPI_ERROR((AE_INFO,
252 "Invalid type (%s) for target of "
253 "Scope operator [%4.4s] (Cannot override)",
254 acpi_ut_get_type_name(node->type),
255 acpi_ut_get_node_name(node)));
256
257 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
258 }
259 break;
260
261 default:
262 /*
263 * For all other named opcodes, we will enter the name into
264 * the namespace.
265 *
266 * Setup the search flags.
267 * Since we are entering a name into the namespace, we do not want to
268 * enable the search-to-root upsearch.
269 *
270 * There are only two conditions where it is acceptable that the name
271 * already exists:
272 * 1) the Scope() operator can reopen a scoping object that was
273 * previously defined (Scope, Method, Device, etc.)
274 * 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
275 * buffer_field, or Package), the name of the object is already
276 * in the namespace.
277 */
278 if (walk_state->deferred_node) {
279
280 /* This name is already in the namespace, get the node */
281
282 node = walk_state->deferred_node;
283 status = AE_OK;
284 break;
285 }
286
287 /*
288 * If we are executing a method, do not create any namespace objects
289 * during the load phase, only during execution.
290 */
291 if (walk_state->method_node) {
292 node = NULL;
293 status = AE_OK;
294 break;
295 }
296
297 flags = ACPI_NS_NO_UPSEARCH;
298 if ((walk_state->opcode != AML_SCOPE_OP) &&
299 (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
300 flags |= ACPI_NS_ERROR_IF_FOUND;
301 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
302 "[%s] Cannot already exist\n",
303 acpi_ut_get_type_name(object_type)));
304 } else {
305 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
306 "[%s] Both Find or Create allowed\n",
307 acpi_ut_get_type_name(object_type)));
308 }
309
310 /*
311 * Enter the named type into the internal namespace. We enter the name
312 * as we go downward in the parse tree. Any necessary subobjects that
313 * involve arguments to the opcode must be created as we go back up the
314 * parse tree later.
315 */
316 status =
317 acpi_ns_lookup(walk_state->scope_info, path, object_type,
318 ACPI_IMODE_LOAD_PASS1, flags, walk_state,
319 &node);
320 if (ACPI_FAILURE(status)) {
321 if (status == AE_ALREADY_EXISTS) {
322
323 /* The name already exists in this scope */
324
325 if (node->flags & ANOBJ_IS_EXTERNAL) {
326 /*
327 * Allow one create on an object or segment that was
328 * previously declared External
329 */
330 node->flags &= ~ANOBJ_IS_EXTERNAL;
331 node->type = (u8) object_type;
332
333 /* Just retyped a node, probably will need to open a scope */
334
335 if (acpi_ns_opens_scope(object_type)) {
336 status =
337 acpi_ds_scope_stack_push
338 (node, object_type,
339 walk_state);
340 if (ACPI_FAILURE(status)) {
341 return_ACPI_STATUS
342 (status);
343 }
344 }
345
346 status = AE_OK;
347 }
348 }
349
350 if (ACPI_FAILURE(status)) {
351 ACPI_ERROR_NAMESPACE(path, status);
352 return_ACPI_STATUS(status);
353 }
354 }
355 break;
356 }
357
358 /* Common exit */
359
360 if (!op) {
361
362 /* Create a new op */
363
364 op = acpi_ps_alloc_op(walk_state->opcode);
365 if (!op) {
366 return_ACPI_STATUS(AE_NO_MEMORY);
367 }
368 }
369
370 /* Initialize the op */
371
372 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
373 op->named.path = ACPI_CAST_PTR(u8, path);
374 #endif
375
376 if (node) {
377 /*
378 * Put the Node in the "op" object that the parser uses, so we
379 * can get it again quickly when this scope is closed
380 */
381 op->common.node = node;
382 op->named.name = node->name.integer;
383 }
384
385 acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
386 op);
387 *out_op = op;
388 return_ACPI_STATUS(status);
389 }
390
391 /*******************************************************************************
392 *
393 * FUNCTION: acpi_ds_load1_end_op
394 *
395 * PARAMETERS: walk_state - Current state of the parse tree walk
396 *
397 * RETURN: Status
398 *
399 * DESCRIPTION: Ascending callback used during the loading of the namespace,
400 * both control methods and everything else.
401 *
402 ******************************************************************************/
403
404 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
405 {
406 union acpi_parse_object *op;
407 acpi_object_type object_type;
408 acpi_status status = AE_OK;
409
410 ACPI_FUNCTION_TRACE(ds_load1_end_op);
411
412 op = walk_state->op;
413 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
414 walk_state));
415
416 /* We are only interested in opcodes that have an associated name */
417
418 if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
419 return_ACPI_STATUS(AE_OK);
420 }
421
422 /* Get the object type to determine if we should pop the scope */
423
424 object_type = walk_state->op_info->object_type;
425
426 #ifndef ACPI_NO_METHOD_EXECUTION
427 if (walk_state->op_info->flags & AML_FIELD) {
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 (walk_state->opcode == AML_FIELD_OP ||
434 walk_state->opcode == AML_BANK_FIELD_OP ||
435 walk_state->opcode == AML_INDEX_FIELD_OP) {
436 status =
437 acpi_ds_init_field_objects(op, walk_state);
438 }
439 }
440 return_ACPI_STATUS(status);
441 }
442
443 /*
444 * If we are executing a method, do not create any namespace objects
445 * during the load phase, only during execution.
446 */
447 if (!walk_state->method_node) {
448 if (op->common.aml_opcode == AML_REGION_OP) {
449 status =
450 acpi_ex_create_region(op->named.data,
451 op->named.length,
452 (acpi_adr_space_type) ((op->
453 common.
454 value.
455 arg)->
456 common.
457 value.
458 integer),
459 walk_state);
460 if (ACPI_FAILURE(status)) {
461 return_ACPI_STATUS(status);
462 }
463 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
464 status =
465 acpi_ex_create_region(op->named.data,
466 op->named.length,
467 ACPI_ADR_SPACE_DATA_TABLE,
468 walk_state);
469 if (ACPI_FAILURE(status)) {
470 return_ACPI_STATUS(status);
471 }
472 }
473 }
474 #endif
475
476 if (op->common.aml_opcode == AML_NAME_OP) {
477
478 /* For Name opcode, get the object type from the argument */
479
480 if (op->common.value.arg) {
481 object_type = (acpi_ps_get_opcode_info((op->common.
482 value.arg)->
483 common.
484 aml_opcode))->
485 object_type;
486
487 /* Set node type if we have a namespace node */
488
489 if (op->common.node) {
490 op->common.node->type = (u8) object_type;
491 }
492 }
493 }
494
495 /*
496 * If we are executing a method, do not create any namespace objects
497 * during the load phase, only during execution.
498 */
499 if (!walk_state->method_node) {
500 if (op->common.aml_opcode == AML_METHOD_OP) {
501 /*
502 * method_op pkg_length name_string method_flags term_list
503 *
504 * Note: We must create the method node/object pair as soon as we
505 * see the method declaration. This allows later pass1 parsing
506 * of invocations of the method (need to know the number of
507 * arguments.)
508 */
509 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
510 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
511 walk_state, op, op->named.node));
512
513 if (!acpi_ns_get_attached_object(op->named.node)) {
514 walk_state->operands[0] =
515 ACPI_CAST_PTR(void, op->named.node);
516 walk_state->num_operands = 1;
517
518 status =
519 acpi_ds_create_operands(walk_state,
520 op->common.value.
521 arg);
522 if (ACPI_SUCCESS(status)) {
523 status =
524 acpi_ex_create_method(op->named.
525 data,
526 op->named.
527 length,
528 walk_state);
529 }
530
531 walk_state->operands[0] = NULL;
532 walk_state->num_operands = 0;
533
534 if (ACPI_FAILURE(status)) {
535 return_ACPI_STATUS(status);
536 }
537 }
538 }
539 }
540
541 /* Pop the scope stack (only if loading a table) */
542
543 if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
544 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
545 "(%s): Popping scope for Op %p\n",
546 acpi_ut_get_type_name(object_type), op));
547
548 status = acpi_ds_scope_stack_pop(walk_state);
549 }
550
551 return_ACPI_STATUS(status);
552 }
Linux with added FPC-III support