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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / acpi / acpica / dswload.c
blobfa4ef9229e17161e714a29c768ff64a98f059943
1 /******************************************************************************
2 *
3 * Module Name: dswload - Dispatcher first pass namespace load callbacks
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2018, 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 "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 0:
77
78 /* Parse only - caller will setup callbacks */
79
80 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
81 ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE;
82 walk_state->descending_callback = NULL;
83 walk_state->ascending_callback = NULL;
84 break;
85
86 case 1:
87
88 /* Load pass 1 */
89
90 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
91 ACPI_PARSE_DELETE_TREE;
92 walk_state->descending_callback = acpi_ds_load1_begin_op;
93 walk_state->ascending_callback = acpi_ds_load1_end_op;
94 break;
95
96 case 2:
97
98 /* Load pass 2 */
99
100 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
101 ACPI_PARSE_DELETE_TREE;
102 walk_state->descending_callback = acpi_ds_load2_begin_op;
103 walk_state->ascending_callback = acpi_ds_load2_end_op;
104 break;
105
106 case 3:
107
108 /* Execution pass */
109
110 #ifndef ACPI_NO_METHOD_EXECUTION
111 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
112 ACPI_PARSE_DELETE_TREE;
113 walk_state->descending_callback = acpi_ds_exec_begin_op;
114 walk_state->ascending_callback = acpi_ds_exec_end_op;
115 #endif
116 break;
117
118 default:
119
120 return (AE_BAD_PARAMETER);
121 }
122
123 return (AE_OK);
124 }
125
126 /*******************************************************************************
127 *
128 * FUNCTION: acpi_ds_load1_begin_op
129 *
130 * PARAMETERS: walk_state - Current state of the parse tree walk
131 * out_op - Where to return op if a new one is created
132 *
133 * RETURN: Status
134 *
135 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
136 *
137 ******************************************************************************/
138
139 acpi_status
140 acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
141 union acpi_parse_object **out_op)
142 {
143 union acpi_parse_object *op;
144 struct acpi_namespace_node *node;
145 acpi_status status;
146 acpi_object_type object_type;
147 char *path;
148 u32 flags;
149
150 ACPI_FUNCTION_TRACE(ds_load1_begin_op);
151
152 op = walk_state->op;
153 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
154 walk_state));
155
156 /* We are only interested in opcodes that have an associated name */
157
158 if (op) {
159 if (!(walk_state->op_info->flags & AML_NAMED)) {
160 *out_op = op;
161 return_ACPI_STATUS(AE_OK);
162 }
163
164 /* Check if this object has already been installed in the namespace */
165
166 if (op->common.node) {
167 *out_op = op;
168 return_ACPI_STATUS(AE_OK);
169 }
170 }
171
172 path = acpi_ps_get_next_namestring(&walk_state->parser_state);
173
174 /* Map the raw opcode into an internal object type */
175
176 object_type = walk_state->op_info->object_type;
177
178 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
179 "State=%p Op=%p [%s]\n", walk_state, op,
180 acpi_ut_get_type_name(object_type)));
181
182 switch (walk_state->opcode) {
183 case AML_SCOPE_OP:
184 /*
185 * The target name of the Scope() operator must exist at this point so
186 * that we can actually open the scope to enter new names underneath it.
187 * Allow search-to-root for single namesegs.
188 */
189 status =
190 acpi_ns_lookup(walk_state->scope_info, path, object_type,
191 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
192 walk_state, &(node));
193 #ifdef ACPI_ASL_COMPILER
194 if (status == AE_NOT_FOUND) {
195 /*
196 * Table disassembly:
197 * Target of Scope() not found. Generate an External for it, and
198 * insert the name into the namespace.
199 */
200 acpi_dm_add_op_to_external_list(op, path,
201 ACPI_TYPE_DEVICE, 0, 0);
202 status =
203 acpi_ns_lookup(walk_state->scope_info, path,
204 object_type, ACPI_IMODE_LOAD_PASS1,
205 ACPI_NS_SEARCH_PARENT, walk_state,
206 &node);
207 }
208 #endif
209 if (ACPI_FAILURE(status)) {
210 ACPI_ERROR_NAMESPACE(walk_state->scope_info, path,
211 status);
212 return_ACPI_STATUS(status);
213 }
214
215 /*
216 * Check to make sure that the target is
217 * one of the opcodes that actually opens a scope
218 */
219 switch (node->type) {
220 case ACPI_TYPE_ANY:
221 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
222 case ACPI_TYPE_DEVICE:
223 case ACPI_TYPE_POWER:
224 case ACPI_TYPE_PROCESSOR:
225 case ACPI_TYPE_THERMAL:
226
227 /* These are acceptable types */
228 break;
229
230 case ACPI_TYPE_INTEGER:
231 case ACPI_TYPE_STRING:
232 case ACPI_TYPE_BUFFER:
233 /*
234 * These types we will allow, but we will change the type.
235 * This enables some existing code of the form:
236 *
237 * Name (DEB, 0)
238 * Scope (DEB) { ... }
239 *
240 * Note: silently change the type here. On the second pass,
241 * we will report a warning
242 */
243 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
244 "Type override - [%4.4s] had invalid type (%s) "
245 "for Scope operator, changed to type ANY\n",
246 acpi_ut_get_node_name(node),
247 acpi_ut_get_type_name(node->type)));
248
249 node->type = ACPI_TYPE_ANY;
250 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
251 break;
252
253 case ACPI_TYPE_METHOD:
254 /*
255 * Allow scope change to root during execution of module-level
256 * code. Root is typed METHOD during this time.
257 */
258 if ((node == acpi_gbl_root_node) &&
259 (walk_state->
260 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
261 break;
262 }
263
264 /*lint -fallthrough */
265
266 default:
267
268 /* All other types are an error */
269
270 ACPI_ERROR((AE_INFO,
271 "Invalid type (%s) for target of "
272 "Scope operator [%4.4s] (Cannot override)",
273 acpi_ut_get_type_name(node->type),
274 acpi_ut_get_node_name(node)));
275
276 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
277 }
278 break;
279
280 default:
281 /*
282 * For all other named opcodes, we will enter the name into
283 * the namespace.
284 *
285 * Setup the search flags.
286 * Since we are entering a name into the namespace, we do not want to
287 * enable the search-to-root upsearch.
288 *
289 * There are only two conditions where it is acceptable that the name
290 * already exists:
291 * 1) the Scope() operator can reopen a scoping object that was
292 * previously defined (Scope, Method, Device, etc.)
293 * 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
294 * buffer_field, or Package), the name of the object is already
295 * in the namespace.
296 */
297 if (walk_state->deferred_node) {
298
299 /* This name is already in the namespace, get the node */
300
301 node = walk_state->deferred_node;
302 status = AE_OK;
303 break;
304 }
305
306 /*
307 * If we are executing a method, do not create any namespace objects
308 * during the load phase, only during execution.
309 */
310 if (walk_state->method_node) {
311 node = NULL;
312 status = AE_OK;
313 break;
314 }
315
316 flags = ACPI_NS_NO_UPSEARCH;
317 if ((walk_state->opcode != AML_SCOPE_OP) &&
318 (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
319 if (walk_state->namespace_override) {
320 flags |= ACPI_NS_OVERRIDE_IF_FOUND;
321 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
322 "[%s] Override allowed\n",
323 acpi_ut_get_type_name
324 (object_type)));
325 } else {
326 flags |= ACPI_NS_ERROR_IF_FOUND;
327 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
328 "[%s] Cannot already exist\n",
329 acpi_ut_get_type_name
330 (object_type)));
331 }
332 } else {
333 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
334 "[%s] Both Find or Create allowed\n",
335 acpi_ut_get_type_name(object_type)));
336 }
337
338 /*
339 * Enter the named type into the internal namespace. We enter the name
340 * as we go downward in the parse tree. Any necessary subobjects that
341 * involve arguments to the opcode must be created as we go back up the
342 * parse tree later.
343 */
344 status =
345 acpi_ns_lookup(walk_state->scope_info, path, object_type,
346 ACPI_IMODE_LOAD_PASS1, flags, walk_state,
347 &node);
348 if (ACPI_FAILURE(status)) {
349 if (status == AE_ALREADY_EXISTS) {
350
351 /* The name already exists in this scope */
352
353 if (node->flags & ANOBJ_IS_EXTERNAL) {
354 /*
355 * Allow one create on an object or segment that was
356 * previously declared External
357 */
358 node->flags &= ~ANOBJ_IS_EXTERNAL;
359 node->type = (u8) object_type;
360
361 /* Just retyped a node, probably will need to open a scope */
362
363 if (acpi_ns_opens_scope(object_type)) {
364 status =
365 acpi_ds_scope_stack_push
366 (node, object_type,
367 walk_state);
368 if (ACPI_FAILURE(status)) {
369 return_ACPI_STATUS
370 (status);
371 }
372 }
373
374 status = AE_OK;
375 }
376 }
377
378 if (ACPI_FAILURE(status)) {
379 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
380 path, status);
381 return_ACPI_STATUS(status);
382 }
383 }
384 break;
385 }
386
387 /* Common exit */
388
389 if (!op) {
390
391 /* Create a new op */
392
393 op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
394 if (!op) {
395 return_ACPI_STATUS(AE_NO_MEMORY);
396 }
397 }
398
399 /* Initialize the op */
400
401 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
402 op->named.path = path;
403 #endif
404
405 if (node) {
406 /*
407 * Put the Node in the "op" object that the parser uses, so we
408 * can get it again quickly when this scope is closed
409 */
410 op->common.node = node;
411 op->named.name = node->name.integer;
412 }
413
414 acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
415 op);
416 *out_op = op;
417 return_ACPI_STATUS(status);
418 }
419
420 /*******************************************************************************
421 *
422 * FUNCTION: acpi_ds_load1_end_op
423 *
424 * PARAMETERS: walk_state - Current state of the parse tree walk
425 *
426 * RETURN: Status
427 *
428 * DESCRIPTION: Ascending callback used during the loading of the namespace,
429 * both control methods and everything else.
430 *
431 ******************************************************************************/
432
433 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
434 {
435 union acpi_parse_object *op;
436 acpi_object_type object_type;
437 acpi_status status = AE_OK;
438
439 #ifdef ACPI_ASL_COMPILER
440 u8 param_count;
441 #endif
442
443 ACPI_FUNCTION_TRACE(ds_load1_end_op);
444
445 op = walk_state->op;
446 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
447 walk_state));
448
449 /* We are only interested in opcodes that have an associated name */
450
451 if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
452 return_ACPI_STATUS(AE_OK);
453 }
454
455 /* Get the object type to determine if we should pop the scope */
456
457 object_type = walk_state->op_info->object_type;
458
459 #ifndef ACPI_NO_METHOD_EXECUTION
460 if (walk_state->op_info->flags & AML_FIELD) {
461 /*
462 * If we are executing a method, do not create any namespace objects
463 * during the load phase, only during execution.
464 */
465 if (!walk_state->method_node) {
466 if (walk_state->opcode == AML_FIELD_OP ||
467 walk_state->opcode == AML_BANK_FIELD_OP ||
468 walk_state->opcode == AML_INDEX_FIELD_OP) {
469 status =
470 acpi_ds_init_field_objects(op, walk_state);
471 }
472 }
473 return_ACPI_STATUS(status);
474 }
475
476 /*
477 * If we are executing a method, do not create any namespace objects
478 * during the load phase, only during execution.
479 */
480 if (!walk_state->method_node) {
481 if (op->common.aml_opcode == AML_REGION_OP) {
482 status =
483 acpi_ex_create_region(op->named.data,
484 op->named.length,
485 (acpi_adr_space_type)
486 ((op->common.value.arg)->
487 common.value.integer),
488 walk_state);
489 if (ACPI_FAILURE(status)) {
490 return_ACPI_STATUS(status);
491 }
492 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
493 status =
494 acpi_ex_create_region(op->named.data,
495 op->named.length,
496 ACPI_ADR_SPACE_DATA_TABLE,
497 walk_state);
498 if (ACPI_FAILURE(status)) {
499 return_ACPI_STATUS(status);
500 }
501 }
502 }
503 #endif
504
505 if (op->common.aml_opcode == AML_NAME_OP) {
506
507 /* For Name opcode, get the object type from the argument */
508
509 if (op->common.value.arg) {
510 object_type = (acpi_ps_get_opcode_info((op->common.
511 value.arg)->
512 common.
513 aml_opcode))->
514 object_type;
515
516 /* Set node type if we have a namespace node */
517
518 if (op->common.node) {
519 op->common.node->type = (u8) object_type;
520 }
521 }
522 }
523 #ifdef ACPI_ASL_COMPILER
524 /*
525 * For external opcode, get the object type from the argument and
526 * get the parameter count from the argument's next.
527 */
528 if (acpi_gbl_disasm_flag &&
529 op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
530 /*
531 * Note, if this external is not a method
532 * Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
533 * Therefore, param_count will be 0.
534 */
535 param_count =
536 (u8)op->common.value.arg->common.next->common.value.integer;
537 object_type = (u8)op->common.value.arg->common.value.integer;
538 op->common.node->flags |= ANOBJ_IS_EXTERNAL;
539 op->common.node->type = (u8)object_type;
540
541 acpi_dm_create_subobject_for_external((u8)object_type,
542 &op->common.node,
543 param_count);
544
545 /*
546 * Add the external to the external list because we may be
547 * emitting code based off of the items within the external list.
548 */
549 acpi_dm_add_op_to_external_list(op, op->named.path,
550 (u8)object_type, param_count,
551 ACPI_EXT_ORIGIN_FROM_OPCODE |
552 ACPI_EXT_RESOLVED_REFERENCE);
553 }
554 #endif
555
556 /*
557 * If we are executing a method, do not create any namespace objects
558 * during the load phase, only during execution.
559 */
560 if (!walk_state->method_node) {
561 if (op->common.aml_opcode == AML_METHOD_OP) {
562 /*
563 * method_op pkg_length name_string method_flags term_list
564 *
565 * Note: We must create the method node/object pair as soon as we
566 * see the method declaration. This allows later pass1 parsing
567 * of invocations of the method (need to know the number of
568 * arguments.)
569 */
570 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
571 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
572 walk_state, op, op->named.node));
573
574 if (!acpi_ns_get_attached_object(op->named.node)) {
575 walk_state->operands[0] =
576 ACPI_CAST_PTR(void, op->named.node);
577 walk_state->num_operands = 1;
578
579 status =
580 acpi_ds_create_operands(walk_state,
581 op->common.value.
582 arg);
583 if (ACPI_SUCCESS(status)) {
584 status =
585 acpi_ex_create_method(op->named.
586 data,
587 op->named.
588 length,
589 walk_state);
590 }
591
592 walk_state->operands[0] = NULL;
593 walk_state->num_operands = 0;
594
595 if (ACPI_FAILURE(status)) {
596 return_ACPI_STATUS(status);
597 }
598 }
599 }
600 }
601
602 /* Pop the scope stack (only if loading a table) */
603
604 if (!walk_state->method_node &&
605 op->common.aml_opcode != AML_EXTERNAL_OP &&
606 acpi_ns_opens_scope(object_type)) {
607 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
608 "(%s): Popping scope for Op %p\n",
609 acpi_ut_get_type_name(object_type), op));
610
611 status = acpi_ds_scope_stack_pop(walk_state);
612 }
613
614 return_ACPI_STATUS(status);
615 }
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