Commit | Line | Data |
---|---|---|
73459f73 RM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: psloop - Main AML parse loop | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, 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 | ||
73459f73 RM |
44 | /* |
45 | * Parse the AML and build an operation tree as most interpreters, | |
46 | * like Perl, do. Parsing is done by hand rather than with a YACC | |
47 | * generated parser to tightly constrain stack and dynamic memory | |
48 | * usage. At the same time, parsing is kept flexible and the code | |
49 | * fairly compact by parsing based on a list of AML opcode | |
50 | * templates in aml_op_info[] | |
51 | */ | |
52 | ||
53 | #include <acpi/acpi.h> | |
54 | #include <acpi/acparser.h> | |
55 | #include <acpi/acdispat.h> | |
56 | #include <acpi/amlcode.h> | |
73459f73 RM |
57 | |
58 | #define _COMPONENT ACPI_PARSER | |
4be44fcd | 59 | ACPI_MODULE_NAME("psloop") |
73459f73 | 60 | |
4be44fcd | 61 | static u32 acpi_gbl_depth = 0; |
73459f73 RM |
62 | |
63 | /******************************************************************************* | |
64 | * | |
65 | * FUNCTION: acpi_ps_parse_loop | |
66 | * | |
67 | * PARAMETERS: walk_state - Current state | |
68 | * | |
69 | * RETURN: Status | |
70 | * | |
71 | * DESCRIPTION: Parse AML (pointed to by the current parser state) and return | |
72 | * a tree of ops. | |
73 | * | |
74 | ******************************************************************************/ | |
75 | ||
4be44fcd | 76 | acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) |
73459f73 | 77 | { |
4be44fcd LB |
78 | acpi_status status = AE_OK; |
79 | acpi_status status2; | |
80 | union acpi_parse_object *op = NULL; /* current op */ | |
81 | union acpi_parse_object *arg = NULL; | |
82 | union acpi_parse_object *pre_op = NULL; | |
83 | struct acpi_parse_state *parser_state; | |
84 | u8 *aml_op_start = NULL; | |
73459f73 | 85 | |
4be44fcd | 86 | ACPI_FUNCTION_TRACE_PTR("ps_parse_loop", walk_state); |
73459f73 RM |
87 | |
88 | if (walk_state->descending_callback == NULL) { | |
4be44fcd | 89 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
73459f73 RM |
90 | } |
91 | ||
92 | parser_state = &walk_state->parser_state; | |
93 | walk_state->arg_types = 0; | |
94 | ||
95 | #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) | |
96 | ||
97 | if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { | |
98 | /* We are restarting a preempted control method */ | |
99 | ||
4be44fcd | 100 | if (acpi_ps_has_completed_scope(parser_state)) { |
73459f73 RM |
101 | /* |
102 | * We must check if a predicate to an IF or WHILE statement | |
103 | * was just completed | |
104 | */ | |
105 | if ((parser_state->scope->parse_scope.op) && | |
4be44fcd LB |
106 | ((parser_state->scope->parse_scope.op->common. |
107 | aml_opcode == AML_IF_OP) | |
108 | || (parser_state->scope->parse_scope.op->common. | |
109 | aml_opcode == AML_WHILE_OP)) | |
110 | && (walk_state->control_state) | |
111 | && (walk_state->control_state->common.state == | |
112 | ACPI_CONTROL_PREDICATE_EXECUTING)) { | |
73459f73 RM |
113 | /* |
114 | * A predicate was just completed, get the value of the | |
115 | * predicate and branch based on that value | |
116 | */ | |
117 | walk_state->op = NULL; | |
4be44fcd LB |
118 | status = |
119 | acpi_ds_get_predicate_value(walk_state, | |
120 | ACPI_TO_POINTER | |
121 | (TRUE)); | |
122 | if (ACPI_FAILURE(status) | |
123 | && ((status & AE_CODE_MASK) != | |
124 | AE_CODE_CONTROL)) { | |
73459f73 | 125 | if (status == AE_AML_NO_RETURN_VALUE) { |
4be44fcd LB |
126 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
127 | "Invoked method did not return a value, %s\n", | |
128 | acpi_format_exception | |
129 | (status))); | |
73459f73 RM |
130 | |
131 | } | |
4be44fcd LB |
132 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
133 | "get_predicate Failed, %s\n", | |
134 | acpi_format_exception | |
135 | (status))); | |
136 | return_ACPI_STATUS(status); | |
73459f73 RM |
137 | } |
138 | ||
4be44fcd LB |
139 | status = |
140 | acpi_ps_next_parse_state(walk_state, op, | |
141 | status); | |
73459f73 RM |
142 | } |
143 | ||
4be44fcd LB |
144 | acpi_ps_pop_scope(parser_state, &op, |
145 | &walk_state->arg_types, | |
146 | &walk_state->arg_count); | |
147 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
148 | "Popped scope, Op=%p\n", op)); | |
149 | } else if (walk_state->prev_op) { | |
73459f73 RM |
150 | /* We were in the middle of an op */ |
151 | ||
152 | op = walk_state->prev_op; | |
153 | walk_state->arg_types = walk_state->prev_arg_types; | |
154 | } | |
155 | } | |
156 | #endif | |
157 | ||
158 | /* Iterative parsing loop, while there is more AML to process: */ | |
159 | ||
160 | while ((parser_state->aml < parser_state->aml_end) || (op)) { | |
161 | aml_op_start = parser_state->aml; | |
162 | if (!op) { | |
163 | /* Get the next opcode from the AML stream */ | |
164 | ||
4be44fcd LB |
165 | walk_state->aml_offset = |
166 | (u32) ACPI_PTR_DIFF(parser_state->aml, | |
167 | parser_state->aml_start); | |
168 | walk_state->opcode = acpi_ps_peek_opcode(parser_state); | |
73459f73 RM |
169 | |
170 | /* | |
171 | * First cut to determine what we have found: | |
172 | * 1) A valid AML opcode | |
173 | * 2) A name string | |
174 | * 3) An unknown/invalid opcode | |
175 | */ | |
4be44fcd LB |
176 | walk_state->op_info = |
177 | acpi_ps_get_opcode_info(walk_state->opcode); | |
73459f73 RM |
178 | switch (walk_state->op_info->class) { |
179 | case AML_CLASS_ASCII: | |
180 | case AML_CLASS_PREFIX: | |
181 | /* | |
182 | * Starts with a valid prefix or ASCII char, this is a name | |
183 | * string. Convert the bare name string to a namepath. | |
184 | */ | |
185 | walk_state->opcode = AML_INT_NAMEPATH_OP; | |
186 | walk_state->arg_types = ARGP_NAMESTRING; | |
187 | break; | |
188 | ||
189 | case AML_CLASS_UNKNOWN: | |
190 | ||
191 | /* The opcode is unrecognized. Just skip unknown opcodes */ | |
192 | ||
4be44fcd LB |
193 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
194 | "Found unknown opcode %X at AML address %p offset %X, ignoring\n", | |
195 | walk_state->opcode, | |
196 | parser_state->aml, | |
197 | walk_state->aml_offset)); | |
73459f73 | 198 | |
4be44fcd | 199 | ACPI_DUMP_BUFFER(parser_state->aml, 128); |
73459f73 RM |
200 | |
201 | /* Assume one-byte bad opcode */ | |
202 | ||
203 | parser_state->aml++; | |
204 | continue; | |
205 | ||
206 | default: | |
207 | ||
208 | /* Found opcode info, this is a normal opcode */ | |
209 | ||
4be44fcd LB |
210 | parser_state->aml += |
211 | acpi_ps_get_opcode_size(walk_state->opcode); | |
212 | walk_state->arg_types = | |
213 | walk_state->op_info->parse_args; | |
73459f73 RM |
214 | break; |
215 | } | |
216 | ||
217 | /* Create Op structure and append to parent's argument list */ | |
218 | ||
219 | if (walk_state->op_info->flags & AML_NAMED) { | |
220 | /* Allocate a new pre_op if necessary */ | |
221 | ||
222 | if (!pre_op) { | |
4be44fcd LB |
223 | pre_op = |
224 | acpi_ps_alloc_op(walk_state-> | |
225 | opcode); | |
73459f73 RM |
226 | if (!pre_op) { |
227 | status = AE_NO_MEMORY; | |
228 | goto close_this_op; | |
229 | } | |
230 | } | |
231 | ||
232 | pre_op->common.value.arg = NULL; | |
233 | pre_op->common.aml_opcode = walk_state->opcode; | |
234 | ||
235 | /* | |
236 | * Get and append arguments until we find the node that contains | |
237 | * the name (the type ARGP_NAME). | |
238 | */ | |
4be44fcd LB |
239 | while (GET_CURRENT_ARG_TYPE |
240 | (walk_state->arg_types) | |
241 | && | |
242 | (GET_CURRENT_ARG_TYPE | |
243 | (walk_state->arg_types) != ARGP_NAME)) { | |
244 | status = | |
245 | acpi_ps_get_next_arg(walk_state, | |
246 | parser_state, | |
247 | GET_CURRENT_ARG_TYPE | |
248 | (walk_state-> | |
249 | arg_types), | |
250 | &arg); | |
251 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
252 | goto close_this_op; |
253 | } | |
254 | ||
4be44fcd LB |
255 | acpi_ps_append_arg(pre_op, arg); |
256 | INCREMENT_ARG_LIST(walk_state-> | |
257 | arg_types); | |
73459f73 RM |
258 | } |
259 | ||
260 | /* | |
261 | * Make sure that we found a NAME and didn't run out of | |
262 | * arguments | |
263 | */ | |
4be44fcd LB |
264 | if (!GET_CURRENT_ARG_TYPE |
265 | (walk_state->arg_types)) { | |
73459f73 RM |
266 | status = AE_AML_NO_OPERAND; |
267 | goto close_this_op; | |
268 | } | |
269 | ||
270 | /* We know that this arg is a name, move to next arg */ | |
271 | ||
4be44fcd | 272 | INCREMENT_ARG_LIST(walk_state->arg_types); |
73459f73 RM |
273 | |
274 | /* | |
275 | * Find the object. This will either insert the object into | |
276 | * the namespace or simply look it up | |
277 | */ | |
278 | walk_state->op = NULL; | |
279 | ||
4be44fcd LB |
280 | status = |
281 | walk_state->descending_callback(walk_state, | |
282 | &op); | |
283 | if (ACPI_FAILURE(status)) { | |
284 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
285 | "During name lookup/catalog, %s\n", | |
286 | acpi_format_exception | |
287 | (status))); | |
73459f73 RM |
288 | goto close_this_op; |
289 | } | |
290 | ||
291 | if (!op) { | |
292 | continue; | |
293 | } | |
294 | ||
4be44fcd LB |
295 | status = |
296 | acpi_ps_next_parse_state(walk_state, op, | |
297 | status); | |
73459f73 RM |
298 | if (status == AE_CTRL_PENDING) { |
299 | status = AE_OK; | |
300 | goto close_this_op; | |
301 | } | |
302 | ||
4be44fcd | 303 | if (ACPI_FAILURE(status)) { |
73459f73 RM |
304 | goto close_this_op; |
305 | } | |
306 | ||
4be44fcd LB |
307 | acpi_ps_append_arg(op, |
308 | pre_op->common.value.arg); | |
73459f73 RM |
309 | acpi_gbl_depth++; |
310 | ||
311 | if (op->common.aml_opcode == AML_REGION_OP) { | |
312 | /* | |
313 | * Defer final parsing of an operation_region body, | |
314 | * because we don't have enough info in the first pass | |
315 | * to parse it correctly (i.e., there may be method | |
316 | * calls within the term_arg elements of the body.) | |
317 | * | |
318 | * However, we must continue parsing because | |
319 | * the opregion is not a standalone package -- | |
320 | * we don't know where the end is at this point. | |
321 | * | |
322 | * (Length is unknown until parse of the body complete) | |
323 | */ | |
4be44fcd LB |
324 | op->named.data = aml_op_start; |
325 | op->named.length = 0; | |
73459f73 | 326 | } |
4be44fcd | 327 | } else { |
73459f73 RM |
328 | /* Not a named opcode, just allocate Op and append to parent */ |
329 | ||
4be44fcd LB |
330 | walk_state->op_info = |
331 | acpi_ps_get_opcode_info(walk_state->opcode); | |
332 | op = acpi_ps_alloc_op(walk_state->opcode); | |
73459f73 RM |
333 | if (!op) { |
334 | status = AE_NO_MEMORY; | |
335 | goto close_this_op; | |
336 | } | |
337 | ||
338 | if (walk_state->op_info->flags & AML_CREATE) { | |
339 | /* | |
340 | * Backup to beginning of create_xXXfield declaration | |
341 | * body_length is unknown until we parse the body | |
342 | */ | |
4be44fcd LB |
343 | op->named.data = aml_op_start; |
344 | op->named.length = 0; | |
73459f73 RM |
345 | } |
346 | ||
4be44fcd LB |
347 | acpi_ps_append_arg(acpi_ps_get_parent_scope |
348 | (parser_state), op); | |
73459f73 RM |
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 = op; | |
356 | ||
4be44fcd LB |
357 | status = |
358 | walk_state-> | |
359 | descending_callback(walk_state, | |
360 | &op); | |
361 | status = | |
362 | acpi_ps_next_parse_state(walk_state, | |
363 | op, | |
364 | status); | |
73459f73 RM |
365 | if (status == AE_CTRL_PENDING) { |
366 | status = AE_OK; | |
367 | goto close_this_op; | |
368 | } | |
369 | ||
4be44fcd | 370 | if (ACPI_FAILURE(status)) { |
73459f73 RM |
371 | goto close_this_op; |
372 | } | |
373 | } | |
374 | } | |
375 | ||
376 | op->common.aml_offset = walk_state->aml_offset; | |
377 | ||
378 | if (walk_state->op_info) { | |
4be44fcd LB |
379 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
380 | "Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n", | |
381 | (u32) op->common.aml_opcode, | |
382 | walk_state->op_info->name, op, | |
383 | parser_state->aml, | |
384 | op->common.aml_offset)); | |
73459f73 RM |
385 | } |
386 | } | |
387 | ||
73459f73 RM |
388 | /* |
389 | * Start arg_count at zero because we don't know if there are | |
390 | * any args yet | |
391 | */ | |
392 | walk_state->arg_count = 0; | |
393 | ||
394 | /* Are there any arguments that must be processed? */ | |
395 | ||
396 | if (walk_state->arg_types) { | |
397 | /* Get arguments */ | |
398 | ||
399 | switch (op->common.aml_opcode) { | |
4be44fcd LB |
400 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
401 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ | |
402 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ | |
403 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ | |
404 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ | |
73459f73 RM |
405 | |
406 | /* Fill in constant or string argument directly */ | |
407 | ||
4be44fcd LB |
408 | acpi_ps_get_next_simple_arg(parser_state, |
409 | GET_CURRENT_ARG_TYPE | |
410 | (walk_state-> | |
411 | arg_types), op); | |
73459f73 RM |
412 | break; |
413 | ||
4be44fcd | 414 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ |
73459f73 | 415 | |
4be44fcd LB |
416 | status = |
417 | acpi_ps_get_next_namepath(walk_state, | |
418 | parser_state, op, | |
419 | 1); | |
420 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
421 | goto close_this_op; |
422 | } | |
423 | ||
424 | walk_state->arg_types = 0; | |
425 | break; | |
426 | ||
427 | default: | |
428 | /* | |
429 | * Op is not a constant or string, append each argument | |
430 | * to the Op | |
431 | */ | |
4be44fcd LB |
432 | while (GET_CURRENT_ARG_TYPE |
433 | (walk_state->arg_types) | |
434 | && !walk_state->arg_count) { | |
73459f73 | 435 | walk_state->aml_offset = (u32) |
4be44fcd LB |
436 | ACPI_PTR_DIFF(parser_state->aml, |
437 | parser_state-> | |
438 | aml_start); | |
439 | ||
440 | status = | |
441 | acpi_ps_get_next_arg(walk_state, | |
442 | parser_state, | |
443 | GET_CURRENT_ARG_TYPE | |
444 | (walk_state-> | |
445 | arg_types), | |
446 | &arg); | |
447 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
448 | goto close_this_op; |
449 | } | |
450 | ||
451 | if (arg) { | |
4be44fcd LB |
452 | arg->common.aml_offset = |
453 | walk_state->aml_offset; | |
454 | acpi_ps_append_arg(op, arg); | |
73459f73 | 455 | } |
4be44fcd LB |
456 | INCREMENT_ARG_LIST(walk_state-> |
457 | arg_types); | |
73459f73 RM |
458 | } |
459 | ||
460 | /* Special processing for certain opcodes */ | |
461 | ||
4be44fcd | 462 | /* TBD (remove): Temporary mechanism to disable this code if needed */ |
f9f4601f | 463 | |
0c9938cc | 464 | #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE |
f9f4601f | 465 | |
4be44fcd LB |
466 | if ((walk_state->pass_number <= |
467 | ACPI_IMODE_LOAD_PASS1) | |
468 | && | |
469 | ((walk_state-> | |
470 | parse_flags & ACPI_PARSE_DISASSEMBLE) == | |
471 | 0)) { | |
73459f73 RM |
472 | /* |
473 | * We want to skip If/Else/While constructs during Pass1 | |
474 | * because we want to actually conditionally execute the | |
475 | * code during Pass2. | |
476 | * | |
477 | * Except for disassembly, where we always want to | |
478 | * walk the If/Else/While packages | |
479 | */ | |
480 | switch (op->common.aml_opcode) { | |
481 | case AML_IF_OP: | |
482 | case AML_ELSE_OP: | |
483 | case AML_WHILE_OP: | |
484 | ||
4be44fcd LB |
485 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
486 | "Pass1: Skipping an If/Else/While body\n")); | |
0c9938cc | 487 | |
73459f73 RM |
488 | /* Skip body of if/else/while in pass 1 */ |
489 | ||
4be44fcd LB |
490 | parser_state->aml = |
491 | parser_state->pkg_end; | |
73459f73 RM |
492 | walk_state->arg_count = 0; |
493 | break; | |
494 | ||
495 | default: | |
496 | break; | |
497 | } | |
498 | } | |
f9f4601f | 499 | #endif |
73459f73 RM |
500 | switch (op->common.aml_opcode) { |
501 | case AML_METHOD_OP: | |
502 | ||
503 | /* | |
504 | * Skip parsing of control method | |
505 | * because we don't have enough info in the first pass | |
506 | * to parse it correctly. | |
507 | * | |
508 | * Save the length and address of the body | |
509 | */ | |
4be44fcd LB |
510 | op->named.data = parser_state->aml; |
511 | op->named.length = | |
512 | (u32) (parser_state->pkg_end - | |
513 | parser_state->aml); | |
73459f73 RM |
514 | |
515 | /* Skip body of method */ | |
516 | ||
4be44fcd LB |
517 | parser_state->aml = |
518 | parser_state->pkg_end; | |
73459f73 RM |
519 | walk_state->arg_count = 0; |
520 | break; | |
521 | ||
522 | case AML_BUFFER_OP: | |
523 | case AML_PACKAGE_OP: | |
524 | case AML_VAR_PACKAGE_OP: | |
525 | ||
526 | if ((op->common.parent) && | |
4be44fcd LB |
527 | (op->common.parent->common. |
528 | aml_opcode == AML_NAME_OP) | |
529 | && (walk_state->pass_number <= | |
530 | ACPI_IMODE_LOAD_PASS2)) { | |
73459f73 RM |
531 | /* |
532 | * Skip parsing of Buffers and Packages | |
533 | * because we don't have enough info in the first pass | |
534 | * to parse them correctly. | |
535 | */ | |
4be44fcd LB |
536 | op->named.data = aml_op_start; |
537 | op->named.length = | |
538 | (u32) (parser_state-> | |
539 | pkg_end - | |
540 | aml_op_start); | |
73459f73 RM |
541 | |
542 | /* Skip body */ | |
543 | ||
4be44fcd LB |
544 | parser_state->aml = |
545 | parser_state->pkg_end; | |
73459f73 RM |
546 | walk_state->arg_count = 0; |
547 | } | |
548 | break; | |
549 | ||
550 | case AML_WHILE_OP: | |
551 | ||
552 | if (walk_state->control_state) { | |
4be44fcd LB |
553 | walk_state->control_state-> |
554 | control.package_end = | |
555 | parser_state->pkg_end; | |
73459f73 RM |
556 | } |
557 | break; | |
558 | ||
559 | default: | |
560 | ||
561 | /* No action for all other opcodes */ | |
562 | break; | |
563 | } | |
564 | break; | |
565 | } | |
566 | } | |
567 | ||
568 | /* Check for arguments that need to be processed */ | |
569 | ||
570 | if (walk_state->arg_count) { | |
571 | /* | |
572 | * There are arguments (complex ones), push Op and | |
573 | * prepare for argument | |
574 | */ | |
4be44fcd LB |
575 | status = acpi_ps_push_scope(parser_state, op, |
576 | walk_state->arg_types, | |
577 | walk_state->arg_count); | |
578 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
579 | goto close_this_op; |
580 | } | |
581 | op = NULL; | |
582 | continue; | |
583 | } | |
584 | ||
585 | /* | |
586 | * All arguments have been processed -- Op is complete, | |
587 | * prepare for next | |
588 | */ | |
4be44fcd LB |
589 | walk_state->op_info = |
590 | acpi_ps_get_opcode_info(op->common.aml_opcode); | |
73459f73 RM |
591 | if (walk_state->op_info->flags & AML_NAMED) { |
592 | if (acpi_gbl_depth) { | |
593 | acpi_gbl_depth--; | |
594 | } | |
595 | ||
596 | if (op->common.aml_opcode == AML_REGION_OP) { | |
597 | /* | |
598 | * Skip parsing of control method or opregion body, | |
599 | * because we don't have enough info in the first pass | |
600 | * to parse them correctly. | |
601 | * | |
602 | * Completed parsing an op_region declaration, we now | |
603 | * know the length. | |
604 | */ | |
4be44fcd LB |
605 | op->named.length = |
606 | (u32) (parser_state->aml - op->named.data); | |
73459f73 RM |
607 | } |
608 | } | |
609 | ||
610 | if (walk_state->op_info->flags & AML_CREATE) { | |
611 | /* | |
612 | * Backup to beginning of create_xXXfield declaration (1 for | |
613 | * Opcode) | |
614 | * | |
615 | * body_length is unknown until we parse the body | |
616 | */ | |
4be44fcd LB |
617 | op->named.length = |
618 | (u32) (parser_state->aml - op->named.data); | |
73459f73 RM |
619 | } |
620 | ||
621 | /* This op complete, notify the dispatcher */ | |
622 | ||
623 | if (walk_state->ascending_callback != NULL) { | |
4be44fcd | 624 | walk_state->op = op; |
73459f73 RM |
625 | walk_state->opcode = op->common.aml_opcode; |
626 | ||
4be44fcd LB |
627 | status = walk_state->ascending_callback(walk_state); |
628 | status = | |
629 | acpi_ps_next_parse_state(walk_state, op, status); | |
73459f73 RM |
630 | if (status == AE_CTRL_PENDING) { |
631 | status = AE_OK; | |
632 | goto close_this_op; | |
633 | } | |
634 | } | |
635 | ||
4be44fcd | 636 | close_this_op: |
73459f73 RM |
637 | /* |
638 | * Finished one argument of the containing scope | |
639 | */ | |
640 | parser_state->scope->parse_scope.arg_count--; | |
641 | ||
642 | /* Finished with pre_op */ | |
643 | ||
644 | if (pre_op) { | |
4be44fcd | 645 | acpi_ps_free_op(pre_op); |
73459f73 RM |
646 | pre_op = NULL; |
647 | } | |
648 | ||
649 | /* Close this Op (will result in parse subtree deletion) */ | |
650 | ||
4be44fcd LB |
651 | status2 = acpi_ps_complete_this_op(walk_state, op); |
652 | if (ACPI_FAILURE(status2)) { | |
653 | return_ACPI_STATUS(status2); | |
73459f73 RM |
654 | } |
655 | op = NULL; | |
656 | ||
657 | switch (status) { | |
658 | case AE_OK: | |
659 | break; | |
660 | ||
73459f73 RM |
661 | case AE_CTRL_TRANSFER: |
662 | ||
663 | /* We are about to transfer to a called method. */ | |
664 | ||
665 | walk_state->prev_op = op; | |
666 | walk_state->prev_arg_types = walk_state->arg_types; | |
4be44fcd | 667 | return_ACPI_STATUS(status); |
73459f73 RM |
668 | |
669 | case AE_CTRL_END: | |
670 | ||
4be44fcd LB |
671 | acpi_ps_pop_scope(parser_state, &op, |
672 | &walk_state->arg_types, | |
673 | &walk_state->arg_count); | |
73459f73 RM |
674 | |
675 | if (op) { | |
4be44fcd LB |
676 | walk_state->op = op; |
677 | walk_state->op_info = | |
678 | acpi_ps_get_opcode_info(op->common. | |
679 | aml_opcode); | |
73459f73 RM |
680 | walk_state->opcode = op->common.aml_opcode; |
681 | ||
4be44fcd LB |
682 | status = |
683 | walk_state->ascending_callback(walk_state); | |
684 | status = | |
685 | acpi_ps_next_parse_state(walk_state, op, | |
686 | status); | |
73459f73 | 687 | |
4be44fcd LB |
688 | status2 = |
689 | acpi_ps_complete_this_op(walk_state, op); | |
690 | if (ACPI_FAILURE(status2)) { | |
691 | return_ACPI_STATUS(status2); | |
73459f73 RM |
692 | } |
693 | op = NULL; | |
694 | } | |
695 | status = AE_OK; | |
696 | break; | |
697 | ||
73459f73 RM |
698 | case AE_CTRL_BREAK: |
699 | case AE_CTRL_CONTINUE: | |
700 | ||
701 | /* Pop off scopes until we find the While */ | |
702 | ||
703 | while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { | |
4be44fcd LB |
704 | acpi_ps_pop_scope(parser_state, &op, |
705 | &walk_state->arg_types, | |
706 | &walk_state->arg_count); | |
defba1d8 BM |
707 | |
708 | if (op->common.aml_opcode != AML_WHILE_OP) { | |
709 | status2 = | |
710 | acpi_ds_result_stack_pop | |
711 | (walk_state); | |
712 | if (ACPI_FAILURE(status2)) { | |
713 | return_ACPI_STATUS(status2); | |
714 | } | |
715 | } | |
73459f73 RM |
716 | } |
717 | ||
718 | /* Close this iteration of the While loop */ | |
719 | ||
4be44fcd LB |
720 | walk_state->op = op; |
721 | walk_state->op_info = | |
722 | acpi_ps_get_opcode_info(op->common.aml_opcode); | |
73459f73 RM |
723 | walk_state->opcode = op->common.aml_opcode; |
724 | ||
4be44fcd LB |
725 | status = walk_state->ascending_callback(walk_state); |
726 | status = | |
727 | acpi_ps_next_parse_state(walk_state, op, status); | |
73459f73 | 728 | |
4be44fcd LB |
729 | status2 = acpi_ps_complete_this_op(walk_state, op); |
730 | if (ACPI_FAILURE(status2)) { | |
731 | return_ACPI_STATUS(status2); | |
73459f73 RM |
732 | } |
733 | op = NULL; | |
734 | ||
735 | status = AE_OK; | |
736 | break; | |
737 | ||
73459f73 RM |
738 | case AE_CTRL_TERMINATE: |
739 | ||
740 | status = AE_OK; | |
741 | ||
742 | /* Clean up */ | |
743 | do { | |
744 | if (op) { | |
4be44fcd LB |
745 | status2 = |
746 | acpi_ps_complete_this_op(walk_state, | |
747 | op); | |
748 | if (ACPI_FAILURE(status2)) { | |
749 | return_ACPI_STATUS(status2); | |
73459f73 RM |
750 | } |
751 | } | |
4be44fcd LB |
752 | acpi_ps_pop_scope(parser_state, &op, |
753 | &walk_state->arg_types, | |
754 | &walk_state->arg_count); | |
73459f73 RM |
755 | |
756 | } while (op); | |
757 | ||
4be44fcd | 758 | return_ACPI_STATUS(status); |
73459f73 | 759 | |
4be44fcd | 760 | default: /* All other non-AE_OK status */ |
73459f73 RM |
761 | |
762 | do { | |
763 | if (op) { | |
4be44fcd LB |
764 | status2 = |
765 | acpi_ps_complete_this_op(walk_state, | |
766 | op); | |
767 | if (ACPI_FAILURE(status2)) { | |
768 | return_ACPI_STATUS(status2); | |
73459f73 RM |
769 | } |
770 | } | |
4be44fcd LB |
771 | acpi_ps_pop_scope(parser_state, &op, |
772 | &walk_state->arg_types, | |
773 | &walk_state->arg_count); | |
73459f73 RM |
774 | |
775 | } while (op); | |
776 | ||
73459f73 RM |
777 | /* |
778 | * TBD: Cleanup parse ops on error | |
779 | */ | |
780 | #if 0 | |
781 | if (op == NULL) { | |
4be44fcd LB |
782 | acpi_ps_pop_scope(parser_state, &op, |
783 | &walk_state->arg_types, | |
784 | &walk_state->arg_count); | |
73459f73 RM |
785 | } |
786 | #endif | |
787 | walk_state->prev_op = op; | |
788 | walk_state->prev_arg_types = walk_state->arg_types; | |
4be44fcd | 789 | return_ACPI_STATUS(status); |
73459f73 RM |
790 | } |
791 | ||
792 | /* This scope complete? */ | |
793 | ||
4be44fcd LB |
794 | if (acpi_ps_has_completed_scope(parser_state)) { |
795 | acpi_ps_pop_scope(parser_state, &op, | |
796 | &walk_state->arg_types, | |
797 | &walk_state->arg_count); | |
798 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
799 | "Popped scope, Op=%p\n", op)); | |
800 | } else { | |
73459f73 RM |
801 | op = NULL; |
802 | } | |
803 | ||
4be44fcd | 804 | } /* while parser_state->Aml */ |
73459f73 RM |
805 | |
806 | /* | |
807 | * Complete the last Op (if not completed), and clear the scope stack. | |
808 | * It is easily possible to end an AML "package" with an unbounded number | |
809 | * of open scopes (such as when several ASL blocks are closed with | |
810 | * sequential closing braces). We want to terminate each one cleanly. | |
811 | */ | |
4be44fcd LB |
812 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", |
813 | op)); | |
73459f73 RM |
814 | do { |
815 | if (op) { | |
816 | if (walk_state->ascending_callback != NULL) { | |
4be44fcd LB |
817 | walk_state->op = op; |
818 | walk_state->op_info = | |
819 | acpi_ps_get_opcode_info(op->common. | |
820 | aml_opcode); | |
73459f73 RM |
821 | walk_state->opcode = op->common.aml_opcode; |
822 | ||
4be44fcd LB |
823 | status = |
824 | walk_state->ascending_callback(walk_state); | |
825 | status = | |
826 | acpi_ps_next_parse_state(walk_state, op, | |
827 | status); | |
73459f73 RM |
828 | if (status == AE_CTRL_PENDING) { |
829 | status = AE_OK; | |
830 | goto close_this_op; | |
831 | } | |
832 | ||
833 | if (status == AE_CTRL_TERMINATE) { | |
834 | status = AE_OK; | |
835 | ||
836 | /* Clean up */ | |
837 | do { | |
838 | if (op) { | |
4be44fcd LB |
839 | status2 = |
840 | acpi_ps_complete_this_op | |
841 | (walk_state, op); | |
842 | if (ACPI_FAILURE | |
843 | (status2)) { | |
844 | return_ACPI_STATUS | |
845 | (status2); | |
73459f73 RM |
846 | } |
847 | } | |
848 | ||
4be44fcd LB |
849 | acpi_ps_pop_scope(parser_state, |
850 | &op, | |
851 | &walk_state-> | |
852 | arg_types, | |
853 | &walk_state-> | |
854 | arg_count); | |
73459f73 RM |
855 | |
856 | } while (op); | |
857 | ||
4be44fcd | 858 | return_ACPI_STATUS(status); |
73459f73 RM |
859 | } |
860 | ||
4be44fcd | 861 | else if (ACPI_FAILURE(status)) { |
73459f73 RM |
862 | /* First error is most important */ |
863 | ||
4be44fcd LB |
864 | (void) |
865 | acpi_ps_complete_this_op(walk_state, | |
866 | op); | |
867 | return_ACPI_STATUS(status); | |
73459f73 RM |
868 | } |
869 | } | |
870 | ||
4be44fcd LB |
871 | status2 = acpi_ps_complete_this_op(walk_state, op); |
872 | if (ACPI_FAILURE(status2)) { | |
873 | return_ACPI_STATUS(status2); | |
73459f73 RM |
874 | } |
875 | } | |
876 | ||
4be44fcd LB |
877 | acpi_ps_pop_scope(parser_state, &op, &walk_state->arg_types, |
878 | &walk_state->arg_count); | |
73459f73 RM |
879 | |
880 | } while (op); | |
881 | ||
4be44fcd | 882 | return_ACPI_STATUS(status); |
73459f73 | 883 | } |