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73459f73 RM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: psloop - Main AML parse loop | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
73459f73 RM |
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) { | |
52fc0b02 | 98 | |
73459f73 RM |
99 | /* We are restarting a preempted control method */ |
100 | ||
4be44fcd | 101 | if (acpi_ps_has_completed_scope(parser_state)) { |
73459f73 RM |
102 | /* |
103 | * We must check if a predicate to an IF or WHILE statement | |
104 | * was just completed | |
105 | */ | |
106 | if ((parser_state->scope->parse_scope.op) && | |
4be44fcd LB |
107 | ((parser_state->scope->parse_scope.op->common. |
108 | aml_opcode == AML_IF_OP) | |
109 | || (parser_state->scope->parse_scope.op->common. | |
110 | aml_opcode == AML_WHILE_OP)) | |
111 | && (walk_state->control_state) | |
112 | && (walk_state->control_state->common.state == | |
113 | ACPI_CONTROL_PREDICATE_EXECUTING)) { | |
73459f73 RM |
114 | /* |
115 | * A predicate was just completed, get the value of the | |
116 | * predicate and branch based on that value | |
117 | */ | |
118 | walk_state->op = NULL; | |
4be44fcd LB |
119 | status = |
120 | acpi_ds_get_predicate_value(walk_state, | |
121 | ACPI_TO_POINTER | |
122 | (TRUE)); | |
123 | if (ACPI_FAILURE(status) | |
124 | && ((status & AE_CODE_MASK) != | |
125 | AE_CODE_CONTROL)) { | |
73459f73 | 126 | if (status == AE_AML_NO_RETURN_VALUE) { |
b8e4d893 BM |
127 | ACPI_EXCEPTION((AE_INFO, status, |
128 | "Invoked method did not return a value")); | |
73459f73 RM |
129 | |
130 | } | |
b8e4d893 BM |
131 | ACPI_EXCEPTION((AE_INFO, status, |
132 | "get_predicate Failed")); | |
4be44fcd | 133 | return_ACPI_STATUS(status); |
73459f73 RM |
134 | } |
135 | ||
4be44fcd LB |
136 | status = |
137 | acpi_ps_next_parse_state(walk_state, op, | |
138 | status); | |
73459f73 RM |
139 | } |
140 | ||
4be44fcd LB |
141 | acpi_ps_pop_scope(parser_state, &op, |
142 | &walk_state->arg_types, | |
143 | &walk_state->arg_count); | |
144 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
145 | "Popped scope, Op=%p\n", op)); | |
146 | } else if (walk_state->prev_op) { | |
52fc0b02 | 147 | |
73459f73 RM |
148 | /* We were in the middle of an op */ |
149 | ||
150 | op = walk_state->prev_op; | |
151 | walk_state->arg_types = walk_state->prev_arg_types; | |
152 | } | |
153 | } | |
154 | #endif | |
155 | ||
156 | /* Iterative parsing loop, while there is more AML to process: */ | |
157 | ||
158 | while ((parser_state->aml < parser_state->aml_end) || (op)) { | |
159 | aml_op_start = parser_state->aml; | |
160 | if (!op) { | |
52fc0b02 | 161 | |
73459f73 RM |
162 | /* Get the next opcode from the AML stream */ |
163 | ||
4be44fcd LB |
164 | walk_state->aml_offset = |
165 | (u32) ACPI_PTR_DIFF(parser_state->aml, | |
166 | parser_state->aml_start); | |
167 | walk_state->opcode = acpi_ps_peek_opcode(parser_state); | |
73459f73 RM |
168 | |
169 | /* | |
170 | * First cut to determine what we have found: | |
171 | * 1) A valid AML opcode | |
172 | * 2) A name string | |
173 | * 3) An unknown/invalid opcode | |
174 | */ | |
4be44fcd LB |
175 | walk_state->op_info = |
176 | acpi_ps_get_opcode_info(walk_state->opcode); | |
73459f73 RM |
177 | switch (walk_state->op_info->class) { |
178 | case AML_CLASS_ASCII: | |
179 | case AML_CLASS_PREFIX: | |
180 | /* | |
181 | * Starts with a valid prefix or ASCII char, this is a name | |
182 | * string. Convert the bare name string to a namepath. | |
183 | */ | |
184 | walk_state->opcode = AML_INT_NAMEPATH_OP; | |
185 | walk_state->arg_types = ARGP_NAMESTRING; | |
186 | break; | |
187 | ||
188 | case AML_CLASS_UNKNOWN: | |
189 | ||
190 | /* The opcode is unrecognized. Just skip unknown opcodes */ | |
191 | ||
b8e4d893 BM |
192 | ACPI_ERROR((AE_INFO, |
193 | "Found unknown opcode %X at AML address %p offset %X, ignoring", | |
194 | walk_state->opcode, | |
195 | parser_state->aml, | |
196 | walk_state->aml_offset)); | |
73459f73 | 197 | |
4be44fcd | 198 | ACPI_DUMP_BUFFER(parser_state->aml, 128); |
73459f73 RM |
199 | |
200 | /* Assume one-byte bad opcode */ | |
201 | ||
202 | parser_state->aml++; | |
203 | continue; | |
204 | ||
205 | default: | |
206 | ||
207 | /* Found opcode info, this is a normal opcode */ | |
208 | ||
4be44fcd LB |
209 | parser_state->aml += |
210 | acpi_ps_get_opcode_size(walk_state->opcode); | |
211 | walk_state->arg_types = | |
212 | walk_state->op_info->parse_args; | |
73459f73 RM |
213 | break; |
214 | } | |
215 | ||
216 | /* Create Op structure and append to parent's argument list */ | |
217 | ||
218 | if (walk_state->op_info->flags & AML_NAMED) { | |
52fc0b02 | 219 | |
73459f73 RM |
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)) { | |
b8e4d893 BM |
284 | ACPI_EXCEPTION((AE_INFO, status, |
285 | "During name lookup/catalog")); | |
73459f73 RM |
286 | goto close_this_op; |
287 | } | |
288 | ||
289 | if (!op) { | |
290 | continue; | |
291 | } | |
292 | ||
4be44fcd LB |
293 | status = |
294 | acpi_ps_next_parse_state(walk_state, op, | |
295 | status); | |
73459f73 RM |
296 | if (status == AE_CTRL_PENDING) { |
297 | status = AE_OK; | |
298 | goto close_this_op; | |
299 | } | |
300 | ||
4be44fcd | 301 | if (ACPI_FAILURE(status)) { |
73459f73 RM |
302 | goto close_this_op; |
303 | } | |
304 | ||
4be44fcd LB |
305 | acpi_ps_append_arg(op, |
306 | pre_op->common.value.arg); | |
73459f73 RM |
307 | acpi_gbl_depth++; |
308 | ||
309 | if (op->common.aml_opcode == AML_REGION_OP) { | |
310 | /* | |
311 | * Defer final parsing of an operation_region body, | |
312 | * because we don't have enough info in the first pass | |
313 | * to parse it correctly (i.e., there may be method | |
314 | * calls within the term_arg elements of the body.) | |
315 | * | |
316 | * However, we must continue parsing because | |
317 | * the opregion is not a standalone package -- | |
318 | * we don't know where the end is at this point. | |
319 | * | |
320 | * (Length is unknown until parse of the body complete) | |
321 | */ | |
4be44fcd LB |
322 | op->named.data = aml_op_start; |
323 | op->named.length = 0; | |
73459f73 | 324 | } |
4be44fcd | 325 | } else { |
73459f73 RM |
326 | /* Not a named opcode, just allocate Op and append to parent */ |
327 | ||
4be44fcd LB |
328 | walk_state->op_info = |
329 | acpi_ps_get_opcode_info(walk_state->opcode); | |
330 | op = acpi_ps_alloc_op(walk_state->opcode); | |
73459f73 RM |
331 | if (!op) { |
332 | status = AE_NO_MEMORY; | |
333 | goto close_this_op; | |
334 | } | |
335 | ||
336 | if (walk_state->op_info->flags & AML_CREATE) { | |
337 | /* | |
338 | * Backup to beginning of create_xXXfield declaration | |
339 | * body_length is unknown until we parse the body | |
340 | */ | |
4be44fcd LB |
341 | op->named.data = aml_op_start; |
342 | op->named.length = 0; | |
73459f73 RM |
343 | } |
344 | ||
4be44fcd LB |
345 | acpi_ps_append_arg(acpi_ps_get_parent_scope |
346 | (parser_state), op); | |
73459f73 RM |
347 | |
348 | if ((walk_state->descending_callback != NULL)) { | |
349 | /* | |
350 | * Find the object. This will either insert the object into | |
351 | * the namespace or simply look it up | |
352 | */ | |
353 | walk_state->op = op; | |
354 | ||
4be44fcd LB |
355 | status = |
356 | walk_state-> | |
357 | descending_callback(walk_state, | |
358 | &op); | |
359 | status = | |
360 | acpi_ps_next_parse_state(walk_state, | |
361 | op, | |
362 | status); | |
73459f73 RM |
363 | if (status == AE_CTRL_PENDING) { |
364 | status = AE_OK; | |
365 | goto close_this_op; | |
366 | } | |
367 | ||
4be44fcd | 368 | if (ACPI_FAILURE(status)) { |
73459f73 RM |
369 | goto close_this_op; |
370 | } | |
371 | } | |
372 | } | |
373 | ||
374 | op->common.aml_offset = walk_state->aml_offset; | |
375 | ||
376 | if (walk_state->op_info) { | |
4be44fcd LB |
377 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
378 | "Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n", | |
379 | (u32) op->common.aml_opcode, | |
380 | walk_state->op_info->name, op, | |
381 | parser_state->aml, | |
382 | op->common.aml_offset)); | |
73459f73 RM |
383 | } |
384 | } | |
385 | ||
73459f73 RM |
386 | /* |
387 | * Start arg_count at zero because we don't know if there are | |
388 | * any args yet | |
389 | */ | |
390 | walk_state->arg_count = 0; | |
391 | ||
392 | /* Are there any arguments that must be processed? */ | |
393 | ||
394 | if (walk_state->arg_types) { | |
52fc0b02 | 395 | |
73459f73 RM |
396 | /* Get arguments */ |
397 | ||
398 | switch (op->common.aml_opcode) { | |
4be44fcd LB |
399 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
400 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ | |
401 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ | |
402 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ | |
403 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ | |
73459f73 RM |
404 | |
405 | /* Fill in constant or string argument directly */ | |
406 | ||
4be44fcd LB |
407 | acpi_ps_get_next_simple_arg(parser_state, |
408 | GET_CURRENT_ARG_TYPE | |
409 | (walk_state-> | |
410 | arg_types), op); | |
73459f73 RM |
411 | break; |
412 | ||
4be44fcd | 413 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ |
73459f73 | 414 | |
4be44fcd LB |
415 | status = |
416 | acpi_ps_get_next_namepath(walk_state, | |
417 | parser_state, op, | |
418 | 1); | |
419 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
420 | goto close_this_op; |
421 | } | |
422 | ||
423 | walk_state->arg_types = 0; | |
424 | break; | |
425 | ||
426 | default: | |
427 | /* | |
428 | * Op is not a constant or string, append each argument | |
429 | * to the Op | |
430 | */ | |
4be44fcd LB |
431 | while (GET_CURRENT_ARG_TYPE |
432 | (walk_state->arg_types) | |
433 | && !walk_state->arg_count) { | |
73459f73 | 434 | walk_state->aml_offset = (u32) |
4be44fcd LB |
435 | ACPI_PTR_DIFF(parser_state->aml, |
436 | parser_state-> | |
437 | aml_start); | |
438 | ||
439 | status = | |
440 | acpi_ps_get_next_arg(walk_state, | |
441 | parser_state, | |
442 | GET_CURRENT_ARG_TYPE | |
443 | (walk_state-> | |
444 | arg_types), | |
445 | &arg); | |
446 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
447 | goto close_this_op; |
448 | } | |
449 | ||
450 | if (arg) { | |
4be44fcd LB |
451 | arg->common.aml_offset = |
452 | walk_state->aml_offset; | |
453 | acpi_ps_append_arg(op, arg); | |
73459f73 | 454 | } |
4be44fcd LB |
455 | INCREMENT_ARG_LIST(walk_state-> |
456 | arg_types); | |
73459f73 RM |
457 | } |
458 | ||
459 | /* Special processing for certain opcodes */ | |
460 | ||
4be44fcd | 461 | /* TBD (remove): Temporary mechanism to disable this code if needed */ |
f9f4601f | 462 | |
0c9938cc | 463 | #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE |
f9f4601f | 464 | |
4be44fcd LB |
465 | if ((walk_state->pass_number <= |
466 | ACPI_IMODE_LOAD_PASS1) | |
467 | && | |
468 | ((walk_state-> | |
469 | parse_flags & ACPI_PARSE_DISASSEMBLE) == | |
470 | 0)) { | |
73459f73 RM |
471 | /* |
472 | * We want to skip If/Else/While constructs during Pass1 | |
473 | * because we want to actually conditionally execute the | |
474 | * code during Pass2. | |
475 | * | |
476 | * Except for disassembly, where we always want to | |
477 | * walk the If/Else/While packages | |
478 | */ | |
479 | switch (op->common.aml_opcode) { | |
480 | case AML_IF_OP: | |
481 | case AML_ELSE_OP: | |
482 | case AML_WHILE_OP: | |
483 | ||
4be44fcd LB |
484 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
485 | "Pass1: Skipping an If/Else/While body\n")); | |
0c9938cc | 486 | |
73459f73 RM |
487 | /* Skip body of if/else/while in pass 1 */ |
488 | ||
4be44fcd LB |
489 | parser_state->aml = |
490 | parser_state->pkg_end; | |
73459f73 RM |
491 | walk_state->arg_count = 0; |
492 | break; | |
493 | ||
494 | default: | |
495 | break; | |
496 | } | |
497 | } | |
f9f4601f | 498 | #endif |
73459f73 RM |
499 | switch (op->common.aml_opcode) { |
500 | case AML_METHOD_OP: | |
501 | ||
502 | /* | |
503 | * Skip parsing of control method | |
504 | * because we don't have enough info in the first pass | |
505 | * to parse it correctly. | |
506 | * | |
507 | * Save the length and address of the body | |
508 | */ | |
4be44fcd LB |
509 | op->named.data = parser_state->aml; |
510 | op->named.length = | |
511 | (u32) (parser_state->pkg_end - | |
512 | parser_state->aml); | |
73459f73 RM |
513 | |
514 | /* Skip body of method */ | |
515 | ||
4be44fcd LB |
516 | parser_state->aml = |
517 | parser_state->pkg_end; | |
73459f73 RM |
518 | walk_state->arg_count = 0; |
519 | break; | |
520 | ||
521 | case AML_BUFFER_OP: | |
522 | case AML_PACKAGE_OP: | |
523 | case AML_VAR_PACKAGE_OP: | |
524 | ||
525 | if ((op->common.parent) && | |
4be44fcd LB |
526 | (op->common.parent->common. |
527 | aml_opcode == AML_NAME_OP) | |
528 | && (walk_state->pass_number <= | |
529 | ACPI_IMODE_LOAD_PASS2)) { | |
73459f73 RM |
530 | /* |
531 | * Skip parsing of Buffers and Packages | |
532 | * because we don't have enough info in the first pass | |
533 | * to parse them correctly. | |
534 | */ | |
4be44fcd LB |
535 | op->named.data = aml_op_start; |
536 | op->named.length = | |
537 | (u32) (parser_state-> | |
538 | pkg_end - | |
539 | aml_op_start); | |
73459f73 RM |
540 | |
541 | /* Skip body */ | |
542 | ||
4be44fcd LB |
543 | parser_state->aml = |
544 | parser_state->pkg_end; | |
73459f73 RM |
545 | walk_state->arg_count = 0; |
546 | } | |
547 | break; | |
548 | ||
549 | case AML_WHILE_OP: | |
550 | ||
551 | if (walk_state->control_state) { | |
4be44fcd LB |
552 | walk_state->control_state-> |
553 | control.package_end = | |
554 | parser_state->pkg_end; | |
73459f73 RM |
555 | } |
556 | break; | |
557 | ||
558 | default: | |
559 | ||
560 | /* No action for all other opcodes */ | |
561 | break; | |
562 | } | |
563 | break; | |
564 | } | |
565 | } | |
566 | ||
567 | /* Check for arguments that need to be processed */ | |
568 | ||
569 | if (walk_state->arg_count) { | |
570 | /* | |
571 | * There are arguments (complex ones), push Op and | |
572 | * prepare for argument | |
573 | */ | |
4be44fcd LB |
574 | status = acpi_ps_push_scope(parser_state, op, |
575 | walk_state->arg_types, | |
576 | walk_state->arg_count); | |
577 | if (ACPI_FAILURE(status)) { | |
73459f73 RM |
578 | goto close_this_op; |
579 | } | |
580 | op = NULL; | |
581 | continue; | |
582 | } | |
583 | ||
584 | /* | |
585 | * All arguments have been processed -- Op is complete, | |
586 | * prepare for next | |
587 | */ | |
4be44fcd LB |
588 | walk_state->op_info = |
589 | acpi_ps_get_opcode_info(op->common.aml_opcode); | |
73459f73 RM |
590 | if (walk_state->op_info->flags & AML_NAMED) { |
591 | if (acpi_gbl_depth) { | |
592 | acpi_gbl_depth--; | |
593 | } | |
594 | ||
595 | if (op->common.aml_opcode == AML_REGION_OP) { | |
596 | /* | |
597 | * Skip parsing of control method or opregion body, | |
598 | * because we don't have enough info in the first pass | |
599 | * to parse them correctly. | |
600 | * | |
601 | * Completed parsing an op_region declaration, we now | |
602 | * know the length. | |
603 | */ | |
4be44fcd LB |
604 | op->named.length = |
605 | (u32) (parser_state->aml - op->named.data); | |
73459f73 RM |
606 | } |
607 | } | |
608 | ||
609 | if (walk_state->op_info->flags & AML_CREATE) { | |
610 | /* | |
611 | * Backup to beginning of create_xXXfield declaration (1 for | |
612 | * Opcode) | |
613 | * | |
614 | * body_length is unknown until we parse the body | |
615 | */ | |
4be44fcd LB |
616 | op->named.length = |
617 | (u32) (parser_state->aml - op->named.data); | |
73459f73 RM |
618 | } |
619 | ||
620 | /* This op complete, notify the dispatcher */ | |
621 | ||
622 | if (walk_state->ascending_callback != NULL) { | |
4be44fcd | 623 | walk_state->op = op; |
73459f73 RM |
624 | walk_state->opcode = op->common.aml_opcode; |
625 | ||
4be44fcd LB |
626 | status = walk_state->ascending_callback(walk_state); |
627 | status = | |
628 | acpi_ps_next_parse_state(walk_state, op, status); | |
73459f73 RM |
629 | if (status == AE_CTRL_PENDING) { |
630 | status = AE_OK; | |
631 | goto close_this_op; | |
632 | } | |
633 | } | |
634 | ||
4be44fcd | 635 | close_this_op: |
73459f73 RM |
636 | /* |
637 | * Finished one argument of the containing scope | |
638 | */ | |
639 | parser_state->scope->parse_scope.arg_count--; | |
640 | ||
641 | /* Finished with pre_op */ | |
642 | ||
643 | if (pre_op) { | |
4be44fcd | 644 | acpi_ps_free_op(pre_op); |
73459f73 RM |
645 | pre_op = NULL; |
646 | } | |
647 | ||
648 | /* Close this Op (will result in parse subtree deletion) */ | |
649 | ||
4be44fcd LB |
650 | status2 = acpi_ps_complete_this_op(walk_state, op); |
651 | if (ACPI_FAILURE(status2)) { | |
652 | return_ACPI_STATUS(status2); | |
73459f73 RM |
653 | } |
654 | op = NULL; | |
655 | ||
656 | switch (status) { | |
657 | case AE_OK: | |
658 | break; | |
659 | ||
73459f73 RM |
660 | case AE_CTRL_TRANSFER: |
661 | ||
662 | /* We are about to transfer to a called method. */ | |
663 | ||
664 | walk_state->prev_op = op; | |
665 | walk_state->prev_arg_types = walk_state->arg_types; | |
4be44fcd | 666 | return_ACPI_STATUS(status); |
73459f73 RM |
667 | |
668 | case AE_CTRL_END: | |
669 | ||
4be44fcd LB |
670 | acpi_ps_pop_scope(parser_state, &op, |
671 | &walk_state->arg_types, | |
672 | &walk_state->arg_count); | |
73459f73 RM |
673 | |
674 | if (op) { | |
4be44fcd LB |
675 | walk_state->op = op; |
676 | walk_state->op_info = | |
677 | acpi_ps_get_opcode_info(op->common. | |
678 | aml_opcode); | |
73459f73 RM |
679 | walk_state->opcode = op->common.aml_opcode; |
680 | ||
4be44fcd LB |
681 | status = |
682 | walk_state->ascending_callback(walk_state); | |
683 | status = | |
684 | acpi_ps_next_parse_state(walk_state, op, | |
685 | status); | |
73459f73 | 686 | |
4be44fcd LB |
687 | status2 = |
688 | acpi_ps_complete_this_op(walk_state, op); | |
689 | if (ACPI_FAILURE(status2)) { | |
690 | return_ACPI_STATUS(status2); | |
73459f73 RM |
691 | } |
692 | op = NULL; | |
693 | } | |
694 | status = AE_OK; | |
695 | break; | |
696 | ||
73459f73 RM |
697 | case AE_CTRL_BREAK: |
698 | case AE_CTRL_CONTINUE: | |
699 | ||
700 | /* Pop off scopes until we find the While */ | |
701 | ||
702 | while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { | |
4be44fcd LB |
703 | acpi_ps_pop_scope(parser_state, &op, |
704 | &walk_state->arg_types, | |
705 | &walk_state->arg_count); | |
defba1d8 BM |
706 | |
707 | if (op->common.aml_opcode != AML_WHILE_OP) { | |
708 | status2 = | |
709 | acpi_ds_result_stack_pop | |
710 | (walk_state); | |
711 | if (ACPI_FAILURE(status2)) { | |
712 | return_ACPI_STATUS(status2); | |
713 | } | |
714 | } | |
73459f73 RM |
715 | } |
716 | ||
717 | /* Close this iteration of the While loop */ | |
718 | ||
4be44fcd LB |
719 | walk_state->op = op; |
720 | walk_state->op_info = | |
721 | acpi_ps_get_opcode_info(op->common.aml_opcode); | |
73459f73 RM |
722 | walk_state->opcode = op->common.aml_opcode; |
723 | ||
4be44fcd LB |
724 | status = walk_state->ascending_callback(walk_state); |
725 | status = | |
726 | acpi_ps_next_parse_state(walk_state, op, status); | |
73459f73 | 727 | |
4be44fcd LB |
728 | status2 = acpi_ps_complete_this_op(walk_state, op); |
729 | if (ACPI_FAILURE(status2)) { | |
730 | return_ACPI_STATUS(status2); | |
73459f73 RM |
731 | } |
732 | op = NULL; | |
733 | ||
734 | status = AE_OK; | |
735 | break; | |
736 | ||
73459f73 RM |
737 | case AE_CTRL_TERMINATE: |
738 | ||
739 | status = AE_OK; | |
740 | ||
741 | /* Clean up */ | |
742 | do { | |
743 | if (op) { | |
4be44fcd LB |
744 | status2 = |
745 | acpi_ps_complete_this_op(walk_state, | |
746 | op); | |
747 | if (ACPI_FAILURE(status2)) { | |
748 | return_ACPI_STATUS(status2); | |
73459f73 RM |
749 | } |
750 | } | |
4be44fcd LB |
751 | acpi_ps_pop_scope(parser_state, &op, |
752 | &walk_state->arg_types, | |
753 | &walk_state->arg_count); | |
73459f73 RM |
754 | |
755 | } while (op); | |
756 | ||
4be44fcd | 757 | return_ACPI_STATUS(status); |
73459f73 | 758 | |
4be44fcd | 759 | default: /* All other non-AE_OK status */ |
73459f73 RM |
760 | |
761 | do { | |
762 | if (op) { | |
4be44fcd LB |
763 | status2 = |
764 | acpi_ps_complete_this_op(walk_state, | |
765 | op); | |
766 | if (ACPI_FAILURE(status2)) { | |
767 | return_ACPI_STATUS(status2); | |
73459f73 RM |
768 | } |
769 | } | |
4be44fcd LB |
770 | acpi_ps_pop_scope(parser_state, &op, |
771 | &walk_state->arg_types, | |
772 | &walk_state->arg_count); | |
73459f73 RM |
773 | |
774 | } while (op); | |
775 | ||
73459f73 RM |
776 | /* |
777 | * TBD: Cleanup parse ops on error | |
778 | */ | |
779 | #if 0 | |
780 | if (op == NULL) { | |
4be44fcd LB |
781 | acpi_ps_pop_scope(parser_state, &op, |
782 | &walk_state->arg_types, | |
783 | &walk_state->arg_count); | |
73459f73 RM |
784 | } |
785 | #endif | |
786 | walk_state->prev_op = op; | |
787 | walk_state->prev_arg_types = walk_state->arg_types; | |
4be44fcd | 788 | return_ACPI_STATUS(status); |
73459f73 RM |
789 | } |
790 | ||
791 | /* This scope complete? */ | |
792 | ||
4be44fcd LB |
793 | if (acpi_ps_has_completed_scope(parser_state)) { |
794 | acpi_ps_pop_scope(parser_state, &op, | |
795 | &walk_state->arg_types, | |
796 | &walk_state->arg_count); | |
797 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
798 | "Popped scope, Op=%p\n", op)); | |
799 | } else { | |
73459f73 RM |
800 | op = NULL; |
801 | } | |
802 | ||
4be44fcd | 803 | } /* while parser_state->Aml */ |
73459f73 RM |
804 | |
805 | /* | |
806 | * Complete the last Op (if not completed), and clear the scope stack. | |
807 | * It is easily possible to end an AML "package" with an unbounded number | |
808 | * of open scopes (such as when several ASL blocks are closed with | |
809 | * sequential closing braces). We want to terminate each one cleanly. | |
810 | */ | |
4be44fcd LB |
811 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", |
812 | op)); | |
73459f73 RM |
813 | do { |
814 | if (op) { | |
815 | if (walk_state->ascending_callback != NULL) { | |
4be44fcd LB |
816 | walk_state->op = op; |
817 | walk_state->op_info = | |
818 | acpi_ps_get_opcode_info(op->common. | |
819 | aml_opcode); | |
73459f73 RM |
820 | walk_state->opcode = op->common.aml_opcode; |
821 | ||
4be44fcd LB |
822 | status = |
823 | walk_state->ascending_callback(walk_state); | |
824 | status = | |
825 | acpi_ps_next_parse_state(walk_state, op, | |
826 | status); | |
73459f73 RM |
827 | if (status == AE_CTRL_PENDING) { |
828 | status = AE_OK; | |
829 | goto close_this_op; | |
830 | } | |
831 | ||
832 | if (status == AE_CTRL_TERMINATE) { | |
833 | status = AE_OK; | |
834 | ||
835 | /* Clean up */ | |
836 | do { | |
837 | if (op) { | |
4be44fcd LB |
838 | status2 = |
839 | acpi_ps_complete_this_op | |
840 | (walk_state, op); | |
841 | if (ACPI_FAILURE | |
842 | (status2)) { | |
843 | return_ACPI_STATUS | |
844 | (status2); | |
73459f73 RM |
845 | } |
846 | } | |
847 | ||
4be44fcd LB |
848 | acpi_ps_pop_scope(parser_state, |
849 | &op, | |
850 | &walk_state-> | |
851 | arg_types, | |
852 | &walk_state-> | |
853 | arg_count); | |
73459f73 RM |
854 | |
855 | } while (op); | |
856 | ||
4be44fcd | 857 | return_ACPI_STATUS(status); |
73459f73 RM |
858 | } |
859 | ||
4be44fcd | 860 | else if (ACPI_FAILURE(status)) { |
52fc0b02 | 861 | |
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 | } |