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-rw-r--r--drivers/acpi/acpica/psobject.c647
1 files changed, 647 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/psobject.c b/drivers/acpi/acpica/psobject.c
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index 000000000000..2f461e4dddff
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+++ b/drivers/acpi/acpica/psobject.c
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1/******************************************************************************
2 *
3 * Module Name: psobject - Support for parse objects
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
49#define _COMPONENT ACPI_PARSER
50ACPI_MODULE_NAME("psobject")
51
52/* Local prototypes */
53static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state);
54
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_ps_get_aml_opcode
58 *
59 * PARAMETERS: walk_state - Current state
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Extract the next AML opcode from the input stream.
64 *
65 ******************************************************************************/
66
67static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state)
68{
69
70 ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state);
71
72 walk_state->aml_offset =
73 (u32)ACPI_PTR_DIFF(walk_state->parser_state.aml,
74 walk_state->parser_state.aml_start);
75 walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state));
76
77 /*
78 * First cut to determine what we have found:
79 * 1) A valid AML opcode
80 * 2) A name string
81 * 3) An unknown/invalid opcode
82 */
83 walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode);
84
85 switch (walk_state->op_info->class) {
86 case AML_CLASS_ASCII:
87 case AML_CLASS_PREFIX:
88 /*
89 * Starts with a valid prefix or ASCII char, this is a name
90 * string. Convert the bare name string to a namepath.
91 */
92 walk_state->opcode = AML_INT_NAMEPATH_OP;
93 walk_state->arg_types = ARGP_NAMESTRING;
94 break;
95
96 case AML_CLASS_UNKNOWN:
97
98 /* The opcode is unrecognized. Complain and skip unknown opcodes */
99
100 if (walk_state->pass_number == 2) {
101 ACPI_ERROR((AE_INFO,
102 "Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring",
103 walk_state->opcode,
104 (u32)(walk_state->aml_offset +
105 sizeof(struct acpi_table_header))));
106
107 ACPI_DUMP_BUFFER((walk_state->parser_state.aml - 16),
108 48);
109
110#ifdef ACPI_ASL_COMPILER
111 /*
112 * This is executed for the disassembler only. Output goes
113 * to the disassembled ASL output file.
114 */
115 acpi_os_printf
116 ("/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n",
117 walk_state->opcode,
118 (u32)(walk_state->aml_offset +
119 sizeof(struct acpi_table_header)));
120
121 /* Dump the context surrounding the invalid opcode */
122
123 acpi_ut_dump_buffer(((u8 *)walk_state->parser_state.
124 aml - 16), 48, DB_BYTE_DISPLAY,
125 (walk_state->aml_offset +
126 sizeof(struct acpi_table_header) -
127 16));
128 acpi_os_printf(" */\n");
129#endif
130 }
131
132 /* Increment past one-byte or two-byte opcode */
133
134 walk_state->parser_state.aml++;
135 if (walk_state->opcode > 0xFF) { /* Can only happen if first byte is 0x5B */
136 walk_state->parser_state.aml++;
137 }
138
139 return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
140
141 default:
142
143 /* Found opcode info, this is a normal opcode */
144
145 walk_state->parser_state.aml +=
146 acpi_ps_get_opcode_size(walk_state->opcode);
147 walk_state->arg_types = walk_state->op_info->parse_args;
148 break;
149 }
150
151 return_ACPI_STATUS(AE_OK);
152}
153
154/*******************************************************************************
155 *
156 * FUNCTION: acpi_ps_build_named_op
157 *
158 * PARAMETERS: walk_state - Current state
159 * aml_op_start - Begin of named Op in AML
160 * unnamed_op - Early Op (not a named Op)
161 * op - Returned Op
162 *
163 * RETURN: Status
164 *
165 * DESCRIPTION: Parse a named Op
166 *
167 ******************************************************************************/
168
169acpi_status
170acpi_ps_build_named_op(struct acpi_walk_state *walk_state,
171 u8 *aml_op_start,
172 union acpi_parse_object *unnamed_op,
173 union acpi_parse_object **op)
174{
175 acpi_status status = AE_OK;
176 union acpi_parse_object *arg = NULL;
177
178 ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state);
179
180 unnamed_op->common.value.arg = NULL;
181 unnamed_op->common.arg_list_length = 0;
182 unnamed_op->common.aml_opcode = walk_state->opcode;
183
184 /*
185 * Get and append arguments until we find the node that contains
186 * the name (the type ARGP_NAME).
187 */
188 while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) &&
189 (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) {
190 status =
191 acpi_ps_get_next_arg(walk_state,
192 &(walk_state->parser_state),
193 GET_CURRENT_ARG_TYPE(walk_state->
194 arg_types), &arg);
195 if (ACPI_FAILURE(status)) {
196 return_ACPI_STATUS(status);
197 }
198
199 acpi_ps_append_arg(unnamed_op, arg);
200 INCREMENT_ARG_LIST(walk_state->arg_types);
201 }
202
203 /*
204 * Make sure that we found a NAME and didn't run out of arguments
205 */
206 if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) {
207 return_ACPI_STATUS(AE_AML_NO_OPERAND);
208 }
209
210 /* We know that this arg is a name, move to next arg */
211
212 INCREMENT_ARG_LIST(walk_state->arg_types);
213
214 /*
215 * Find the object. This will either insert the object into
216 * the namespace or simply look it up
217 */
218 walk_state->op = NULL;
219
220 status = walk_state->descending_callback(walk_state, op);
221 if (ACPI_FAILURE(status)) {
222 ACPI_EXCEPTION((AE_INFO, status, "During name lookup/catalog"));
223 return_ACPI_STATUS(status);
224 }
225
226 if (!*op) {
227 return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
228 }
229
230 status = acpi_ps_next_parse_state(walk_state, *op, status);
231 if (ACPI_FAILURE(status)) {
232 if (status == AE_CTRL_PENDING) {
233 return_ACPI_STATUS(AE_CTRL_PARSE_PENDING);
234 }
235 return_ACPI_STATUS(status);
236 }
237
238 acpi_ps_append_arg(*op, unnamed_op->common.value.arg);
239
240 if ((*op)->common.aml_opcode == AML_REGION_OP ||
241 (*op)->common.aml_opcode == AML_DATA_REGION_OP) {
242 /*
243 * Defer final parsing of an operation_region body, because we don't
244 * have enough info in the first pass to parse it correctly (i.e.,
245 * there may be method calls within the term_arg elements of the body.)
246 *
247 * However, we must continue parsing because the opregion is not a
248 * standalone package -- we don't know where the end is at this point.
249 *
250 * (Length is unknown until parse of the body complete)
251 */
252 (*op)->named.data = aml_op_start;
253 (*op)->named.length = 0;
254 }
255
256 return_ACPI_STATUS(AE_OK);
257}
258
259/*******************************************************************************
260 *
261 * FUNCTION: acpi_ps_create_op
262 *
263 * PARAMETERS: walk_state - Current state
264 * aml_op_start - Op start in AML
265 * new_op - Returned Op
266 *
267 * RETURN: Status
268 *
269 * DESCRIPTION: Get Op from AML
270 *
271 ******************************************************************************/
272
273acpi_status
274acpi_ps_create_op(struct acpi_walk_state *walk_state,
275 u8 *aml_op_start, union acpi_parse_object **new_op)
276{
277 acpi_status status = AE_OK;
278 union acpi_parse_object *op;
279 union acpi_parse_object *named_op = NULL;
280 union acpi_parse_object *parent_scope;
281 u8 argument_count;
282 const struct acpi_opcode_info *op_info;
283
284 ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state);
285
286 status = acpi_ps_get_aml_opcode(walk_state);
287 if (status == AE_CTRL_PARSE_CONTINUE) {
288 return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE);
289 }
290
291 /* Create Op structure and append to parent's argument list */
292
293 walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode);
294 op = acpi_ps_alloc_op(walk_state->opcode);
295 if (!op) {
296 return_ACPI_STATUS(AE_NO_MEMORY);
297 }
298
299 if (walk_state->op_info->flags & AML_NAMED) {
300 status =
301 acpi_ps_build_named_op(walk_state, aml_op_start, op,
302 &named_op);
303 acpi_ps_free_op(op);
304 if (ACPI_FAILURE(status)) {
305 return_ACPI_STATUS(status);
306 }
307
308 *new_op = named_op;
309 return_ACPI_STATUS(AE_OK);
310 }
311
312 /* Not a named opcode, just allocate Op and append to parent */
313
314 if (walk_state->op_info->flags & AML_CREATE) {
315 /*
316 * Backup to beginning of create_XXXfield declaration
317 * body_length is unknown until we parse the body
318 */
319 op->named.data = aml_op_start;
320 op->named.length = 0;
321 }
322
323 if (walk_state->opcode == AML_BANK_FIELD_OP) {
324 /*
325 * Backup to beginning of bank_field declaration
326 * body_length is unknown until we parse the body
327 */
328 op->named.data = aml_op_start;
329 op->named.length = 0;
330 }
331
332 parent_scope = acpi_ps_get_parent_scope(&(walk_state->parser_state));
333 acpi_ps_append_arg(parent_scope, op);
334
335 if (parent_scope) {
336 op_info =
337 acpi_ps_get_opcode_info(parent_scope->common.aml_opcode);
338 if (op_info->flags & AML_HAS_TARGET) {
339 argument_count =
340 acpi_ps_get_argument_count(op_info->type);
341 if (parent_scope->common.arg_list_length >
342 argument_count) {
343 op->common.flags |= ACPI_PARSEOP_TARGET;
344 }
345 } else if (parent_scope->common.aml_opcode == AML_INCREMENT_OP) {
346 op->common.flags |= ACPI_PARSEOP_TARGET;
347 }
348 }
349
350 if (walk_state->descending_callback != NULL) {
351 /*
352 * Find the object. This will either insert the object into
353 * the namespace or simply look it up
354 */
355 walk_state->op = *new_op = op;
356
357 status = walk_state->descending_callback(walk_state, &op);
358 status = acpi_ps_next_parse_state(walk_state, op, status);
359 if (status == AE_CTRL_PENDING) {
360 status = AE_CTRL_PARSE_PENDING;
361 }
362 }
363
364 return_ACPI_STATUS(status);
365}
366
367/*******************************************************************************
368 *
369 * FUNCTION: acpi_ps_complete_op
370 *
371 * PARAMETERS: walk_state - Current state
372 * op - Returned Op
373 * status - Parse status before complete Op
374 *
375 * RETURN: Status
376 *
377 * DESCRIPTION: Complete Op
378 *
379 ******************************************************************************/
380
381acpi_status
382acpi_ps_complete_op(struct acpi_walk_state *walk_state,
383 union acpi_parse_object **op, acpi_status status)
384{
385 acpi_status status2;
386
387 ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state);
388
389 /*
390 * Finished one argument of the containing scope
391 */
392 walk_state->parser_state.scope->parse_scope.arg_count--;
393
394 /* Close this Op (will result in parse subtree deletion) */
395
396 status2 = acpi_ps_complete_this_op(walk_state, *op);
397 if (ACPI_FAILURE(status2)) {
398 return_ACPI_STATUS(status2);
399 }
400
401 *op = NULL;
402
403 switch (status) {
404 case AE_OK:
405 break;
406
407 case AE_CTRL_TRANSFER:
408
409 /* We are about to transfer to a called method */
410
411 walk_state->prev_op = NULL;
412 walk_state->prev_arg_types = walk_state->arg_types;
413 return_ACPI_STATUS(status);
414
415 case AE_CTRL_END:
416
417 acpi_ps_pop_scope(&(walk_state->parser_state), op,
418 &walk_state->arg_types,
419 &walk_state->arg_count);
420
421 if (*op) {
422 walk_state->op = *op;
423 walk_state->op_info =
424 acpi_ps_get_opcode_info((*op)->common.aml_opcode);
425 walk_state->opcode = (*op)->common.aml_opcode;
426
427 status = walk_state->ascending_callback(walk_state);
428 status =
429 acpi_ps_next_parse_state(walk_state, *op, status);
430
431 status2 = acpi_ps_complete_this_op(walk_state, *op);
432 if (ACPI_FAILURE(status2)) {
433 return_ACPI_STATUS(status2);
434 }
435 }
436
437 status = AE_OK;
438 break;
439
440 case AE_CTRL_BREAK:
441 case AE_CTRL_CONTINUE:
442
443 /* Pop off scopes until we find the While */
444
445 while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) {
446 acpi_ps_pop_scope(&(walk_state->parser_state), op,
447 &walk_state->arg_types,
448 &walk_state->arg_count);
449 }
450
451 /* Close this iteration of the While loop */
452
453 walk_state->op = *op;
454 walk_state->op_info =
455 acpi_ps_get_opcode_info((*op)->common.aml_opcode);
456 walk_state->opcode = (*op)->common.aml_opcode;
457
458 status = walk_state->ascending_callback(walk_state);
459 status = acpi_ps_next_parse_state(walk_state, *op, status);
460
461 status2 = acpi_ps_complete_this_op(walk_state, *op);
462 if (ACPI_FAILURE(status2)) {
463 return_ACPI_STATUS(status2);
464 }
465
466 status = AE_OK;
467 break;
468
469 case AE_CTRL_TERMINATE:
470
471 /* Clean up */
472 do {
473 if (*op) {
474 status2 =
475 acpi_ps_complete_this_op(walk_state, *op);
476 if (ACPI_FAILURE(status2)) {
477 return_ACPI_STATUS(status2);
478 }
479
480 acpi_ut_delete_generic_state
481 (acpi_ut_pop_generic_state
482 (&walk_state->control_state));
483 }
484
485 acpi_ps_pop_scope(&(walk_state->parser_state), op,
486 &walk_state->arg_types,
487 &walk_state->arg_count);
488
489 } while (*op);
490
491 return_ACPI_STATUS(AE_OK);
492
493 default: /* All other non-AE_OK status */
494
495 do {
496 if (*op) {
497 status2 =
498 acpi_ps_complete_this_op(walk_state, *op);
499 if (ACPI_FAILURE(status2)) {
500 return_ACPI_STATUS(status2);
501 }
502 }
503
504 acpi_ps_pop_scope(&(walk_state->parser_state), op,
505 &walk_state->arg_types,
506 &walk_state->arg_count);
507
508 } while (*op);
509
510#if 0
511 /*
512 * TBD: Cleanup parse ops on error
513 */
514 if (*op == NULL) {
515 acpi_ps_pop_scope(parser_state, op,
516 &walk_state->arg_types,
517 &walk_state->arg_count);
518 }
519#endif
520 walk_state->prev_op = NULL;
521 walk_state->prev_arg_types = walk_state->arg_types;
522 return_ACPI_STATUS(status);
523 }
524
525 /* This scope complete? */
526
527 if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) {
528 acpi_ps_pop_scope(&(walk_state->parser_state), op,
529 &walk_state->arg_types,
530 &walk_state->arg_count);
531 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op));
532 } else {
533 *op = NULL;
534 }
535
536 return_ACPI_STATUS(AE_OK);
537}
538
539/*******************************************************************************
540 *
541 * FUNCTION: acpi_ps_complete_final_op
542 *
543 * PARAMETERS: walk_state - Current state
544 * op - Current Op
545 * status - Current parse status before complete last
546 * Op
547 *
548 * RETURN: Status
549 *
550 * DESCRIPTION: Complete last Op.
551 *
552 ******************************************************************************/
553
554acpi_status
555acpi_ps_complete_final_op(struct acpi_walk_state *walk_state,
556 union acpi_parse_object *op, acpi_status status)
557{
558 acpi_status status2;
559
560 ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state);
561
562 /*
563 * Complete the last Op (if not completed), and clear the scope stack.
564 * It is easily possible to end an AML "package" with an unbounded number
565 * of open scopes (such as when several ASL blocks are closed with
566 * sequential closing braces). We want to terminate each one cleanly.
567 */
568 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n",
569 op));
570 do {
571 if (op) {
572 if (walk_state->ascending_callback != NULL) {
573 walk_state->op = op;
574 walk_state->op_info =
575 acpi_ps_get_opcode_info(op->common.
576 aml_opcode);
577 walk_state->opcode = op->common.aml_opcode;
578
579 status =
580 walk_state->ascending_callback(walk_state);
581 status =
582 acpi_ps_next_parse_state(walk_state, op,
583 status);
584 if (status == AE_CTRL_PENDING) {
585 status =
586 acpi_ps_complete_op(walk_state, &op,
587 AE_OK);
588 if (ACPI_FAILURE(status)) {
589 return_ACPI_STATUS(status);
590 }
591 }
592
593 if (status == AE_CTRL_TERMINATE) {
594 status = AE_OK;
595
596 /* Clean up */
597 do {
598 if (op) {
599 status2 =
600 acpi_ps_complete_this_op
601 (walk_state, op);
602 if (ACPI_FAILURE
603 (status2)) {
604 return_ACPI_STATUS
605 (status2);
606 }
607 }
608
609 acpi_ps_pop_scope(&
610 (walk_state->
611 parser_state),
612 &op,
613 &walk_state->
614 arg_types,
615 &walk_state->
616 arg_count);
617
618 } while (op);
619
620 return_ACPI_STATUS(status);
621 }
622
623 else if (ACPI_FAILURE(status)) {
624
625 /* First error is most important */
626
627 (void)
628 acpi_ps_complete_this_op(walk_state,
629 op);
630 return_ACPI_STATUS(status);
631 }
632 }
633
634 status2 = acpi_ps_complete_this_op(walk_state, op);
635 if (ACPI_FAILURE(status2)) {
636 return_ACPI_STATUS(status2);
637 }
638 }
639
640 acpi_ps_pop_scope(&(walk_state->parser_state), &op,
641 &walk_state->arg_types,
642 &walk_state->arg_count);
643
644 } while (op);
645
646 return_ACPI_STATUS(status);
647}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-06 13:26:35 -0500