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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: psargs - Parse AML opcode arguments | |
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 | ||
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acparser.h> | |
47 | #include <acpi/amlcode.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | ||
50 | #define _COMPONENT ACPI_PARSER | |
51 | ACPI_MODULE_NAME ("psargs") | |
52 | ||
44f6c012 RM |
53 | /* Local prototypes */ |
54 | ||
55 | static u32 | |
56 | acpi_ps_get_next_package_length ( | |
57 | struct acpi_parse_state *parser_state); | |
58 | ||
59 | static union acpi_parse_object * | |
60 | acpi_ps_get_next_field ( | |
61 | struct acpi_parse_state *parser_state); | |
62 | ||
1da177e4 LT |
63 | |
64 | /******************************************************************************* | |
65 | * | |
66 | * FUNCTION: acpi_ps_get_next_package_length | |
67 | * | |
68 | * PARAMETERS: parser_state - Current parser state object | |
69 | * | |
70 | * RETURN: Decoded package length. On completion, the AML pointer points | |
71 | * past the length byte or bytes. | |
72 | * | |
73 | * DESCRIPTION: Decode and return a package length field | |
74 | * | |
75 | ******************************************************************************/ | |
76 | ||
44f6c012 | 77 | static u32 |
1da177e4 LT |
78 | acpi_ps_get_next_package_length ( |
79 | struct acpi_parse_state *parser_state) | |
80 | { | |
81 | u32 encoded_length; | |
82 | u32 length = 0; | |
83 | ||
84 | ||
85 | ACPI_FUNCTION_TRACE ("ps_get_next_package_length"); | |
86 | ||
87 | ||
88 | encoded_length = (u32) ACPI_GET8 (parser_state->aml); | |
89 | parser_state->aml++; | |
90 | ||
1da177e4 LT |
91 | switch (encoded_length >> 6) /* bits 6-7 contain encoding scheme */ { |
92 | case 0: /* 1-byte encoding (bits 0-5) */ | |
93 | ||
94 | length = (encoded_length & 0x3F); | |
95 | break; | |
96 | ||
97 | ||
98 | case 1: /* 2-byte encoding (next byte + bits 0-3) */ | |
99 | ||
100 | length = ((ACPI_GET8 (parser_state->aml) << 04) | | |
101 | (encoded_length & 0x0F)); | |
102 | parser_state->aml++; | |
103 | break; | |
104 | ||
105 | ||
106 | case 2: /* 3-byte encoding (next 2 bytes + bits 0-3) */ | |
107 | ||
108 | length = ((ACPI_GET8 (parser_state->aml + 1) << 12) | | |
109 | (ACPI_GET8 (parser_state->aml) << 04) | | |
110 | (encoded_length & 0x0F)); | |
111 | parser_state->aml += 2; | |
112 | break; | |
113 | ||
114 | ||
115 | case 3: /* 4-byte encoding (next 3 bytes + bits 0-3) */ | |
116 | ||
117 | length = ((ACPI_GET8 (parser_state->aml + 2) << 20) | | |
118 | (ACPI_GET8 (parser_state->aml + 1) << 12) | | |
119 | (ACPI_GET8 (parser_state->aml) << 04) | | |
120 | (encoded_length & 0x0F)); | |
121 | parser_state->aml += 3; | |
122 | break; | |
123 | ||
124 | default: | |
125 | ||
126 | /* Can't get here, only 2 bits / 4 cases */ | |
127 | break; | |
128 | } | |
129 | ||
130 | return_VALUE (length); | |
131 | } | |
132 | ||
133 | ||
134 | /******************************************************************************* | |
135 | * | |
136 | * FUNCTION: acpi_ps_get_next_package_end | |
137 | * | |
138 | * PARAMETERS: parser_state - Current parser state object | |
139 | * | |
140 | * RETURN: Pointer to end-of-package +1 | |
141 | * | |
142 | * DESCRIPTION: Get next package length and return a pointer past the end of | |
143 | * the package. Consumes the package length field | |
144 | * | |
145 | ******************************************************************************/ | |
146 | ||
147 | u8 * | |
148 | acpi_ps_get_next_package_end ( | |
149 | struct acpi_parse_state *parser_state) | |
150 | { | |
151 | u8 *start = parser_state->aml; | |
152 | acpi_native_uint length; | |
153 | ||
154 | ||
155 | ACPI_FUNCTION_TRACE ("ps_get_next_package_end"); | |
156 | ||
157 | ||
158 | /* Function below changes parser_state->Aml */ | |
159 | ||
160 | length = (acpi_native_uint) acpi_ps_get_next_package_length (parser_state); | |
161 | ||
162 | return_PTR (start + length); /* end of package */ | |
163 | } | |
164 | ||
165 | ||
166 | /******************************************************************************* | |
167 | * | |
168 | * FUNCTION: acpi_ps_get_next_namestring | |
169 | * | |
170 | * PARAMETERS: parser_state - Current parser state object | |
171 | * | |
172 | * RETURN: Pointer to the start of the name string (pointer points into | |
173 | * the AML. | |
174 | * | |
175 | * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name | |
176 | * prefix characters. Set parser state to point past the string. | |
177 | * (Name is consumed from the AML.) | |
178 | * | |
179 | ******************************************************************************/ | |
180 | ||
181 | char * | |
182 | acpi_ps_get_next_namestring ( | |
183 | struct acpi_parse_state *parser_state) | |
184 | { | |
185 | u8 *start = parser_state->aml; | |
186 | u8 *end = parser_state->aml; | |
187 | ||
188 | ||
189 | ACPI_FUNCTION_TRACE ("ps_get_next_namestring"); | |
190 | ||
191 | ||
192 | /* Handle multiple prefix characters */ | |
193 | ||
194 | while (acpi_ps_is_prefix_char (ACPI_GET8 (end))) { | |
195 | /* Include prefix '\\' or '^' */ | |
196 | ||
197 | end++; | |
198 | } | |
199 | ||
200 | /* Decode the path */ | |
201 | ||
202 | switch (ACPI_GET8 (end)) { | |
203 | case 0: | |
204 | ||
205 | /* null_name */ | |
206 | ||
207 | if (end == start) { | |
208 | start = NULL; | |
209 | } | |
210 | end++; | |
211 | break; | |
212 | ||
213 | case AML_DUAL_NAME_PREFIX: | |
214 | ||
215 | /* Two name segments */ | |
216 | ||
217 | end += 1 + (2 * ACPI_NAME_SIZE); | |
218 | break; | |
219 | ||
220 | case AML_MULTI_NAME_PREFIX_OP: | |
221 | ||
222 | /* Multiple name segments, 4 chars each */ | |
223 | ||
224 | end += 2 + ((acpi_size) ACPI_GET8 (end + 1) * ACPI_NAME_SIZE); | |
225 | break; | |
226 | ||
227 | default: | |
228 | ||
229 | /* Single name segment */ | |
230 | ||
231 | end += ACPI_NAME_SIZE; | |
232 | break; | |
233 | } | |
234 | ||
235 | parser_state->aml = (u8*) end; | |
236 | return_PTR ((char *) start); | |
237 | } | |
238 | ||
239 | ||
240 | /******************************************************************************* | |
241 | * | |
242 | * FUNCTION: acpi_ps_get_next_namepath | |
243 | * | |
244 | * PARAMETERS: parser_state - Current parser state object | |
245 | * Arg - Where the namepath will be stored | |
246 | * arg_count - If the namepath points to a control method | |
247 | * the method's argument is returned here. | |
248 | * method_call - Whether the namepath can possibly be the | |
249 | * start of a method call | |
250 | * | |
251 | * RETURN: Status | |
252 | * | |
253 | * DESCRIPTION: Get next name (if method call, return # of required args). | |
254 | * Names are looked up in the internal namespace to determine | |
255 | * if the name represents a control method. If a method | |
256 | * is found, the number of arguments to the method is returned. | |
257 | * This information is critical for parsing to continue correctly. | |
258 | * | |
259 | ******************************************************************************/ | |
260 | ||
261 | acpi_status | |
262 | acpi_ps_get_next_namepath ( | |
263 | struct acpi_walk_state *walk_state, | |
264 | struct acpi_parse_state *parser_state, | |
265 | union acpi_parse_object *arg, | |
266 | u8 method_call) | |
267 | { | |
268 | char *path; | |
269 | union acpi_parse_object *name_op; | |
270 | acpi_status status = AE_OK; | |
271 | union acpi_operand_object *method_desc; | |
272 | struct acpi_namespace_node *node; | |
273 | union acpi_generic_state scope_info; | |
274 | ||
275 | ||
276 | ACPI_FUNCTION_TRACE ("ps_get_next_namepath"); | |
277 | ||
278 | ||
279 | path = acpi_ps_get_next_namestring (parser_state); | |
280 | ||
281 | /* Null path case is allowed */ | |
282 | ||
283 | if (path) { | |
284 | /* | |
285 | * Lookup the name in the internal namespace | |
286 | */ | |
287 | scope_info.scope.node = NULL; | |
288 | node = parser_state->start_node; | |
289 | if (node) { | |
290 | scope_info.scope.node = node; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Lookup object. We don't want to add anything new to the namespace | |
295 | * here, however. So we use MODE_EXECUTE. Allow searching of the | |
296 | * parent tree, but don't open a new scope -- we just want to lookup the | |
297 | * object (MUST BE mode EXECUTE to perform upsearch) | |
298 | */ | |
44f6c012 RM |
299 | status = acpi_ns_lookup (&scope_info, path, ACPI_TYPE_ANY, |
300 | ACPI_IMODE_EXECUTE, | |
301 | ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, | |
302 | NULL, &node); | |
1da177e4 LT |
303 | if (ACPI_SUCCESS (status) && method_call) { |
304 | if (node->type == ACPI_TYPE_METHOD) { | |
44f6c012 RM |
305 | /* This name is actually a control method invocation */ |
306 | ||
1da177e4 LT |
307 | method_desc = acpi_ns_get_attached_object (node); |
308 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, | |
309 | "Control Method - %p Desc %p Path=%p\n", | |
310 | node, method_desc, path)); | |
311 | ||
312 | name_op = acpi_ps_alloc_op (AML_INT_NAMEPATH_OP); | |
313 | if (!name_op) { | |
314 | return_ACPI_STATUS (AE_NO_MEMORY); | |
315 | } | |
316 | ||
317 | /* Change arg into a METHOD CALL and attach name to it */ | |
318 | ||
319 | acpi_ps_init_op (arg, AML_INT_METHODCALL_OP); | |
320 | name_op->common.value.name = path; | |
321 | ||
322 | /* Point METHODCALL/NAME to the METHOD Node */ | |
323 | ||
324 | name_op->common.node = node; | |
325 | acpi_ps_append_arg (arg, name_op); | |
326 | ||
327 | if (!method_desc) { | |
328 | ACPI_REPORT_ERROR (( | |
329 | "ps_get_next_namepath: Control Method %p has no attached object\n", | |
330 | node)); | |
331 | return_ACPI_STATUS (AE_AML_INTERNAL); | |
332 | } | |
333 | ||
334 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, | |
335 | "Control Method - %p Args %X\n", | |
336 | node, method_desc->method.param_count)); | |
337 | ||
338 | /* Get the number of arguments to expect */ | |
339 | ||
340 | walk_state->arg_count = method_desc->method.param_count; | |
341 | return_ACPI_STATUS (AE_OK); | |
342 | } | |
343 | ||
344 | /* | |
345 | * Else this is normal named object reference. | |
346 | * Just init the NAMEPATH object with the pathname. | |
347 | * (See code below) | |
348 | */ | |
349 | } | |
350 | ||
351 | if (ACPI_FAILURE (status)) { | |
352 | /* | |
353 | * 1) Any error other than NOT_FOUND is always severe | |
354 | * 2) NOT_FOUND is only important if we are executing a method. | |
355 | * 3) If executing a cond_ref_of opcode, NOT_FOUND is ok. | |
356 | */ | |
357 | if ((((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) && | |
358 | (status == AE_NOT_FOUND) && | |
359 | (walk_state->op->common.aml_opcode != AML_COND_REF_OF_OP)) || | |
360 | ||
361 | (status != AE_NOT_FOUND)) { | |
362 | ACPI_REPORT_NSERROR (path, status); | |
363 | ||
364 | acpi_os_printf ("search_node %p start_node %p return_node %p\n", | |
365 | scope_info.scope.node, parser_state->start_node, node); | |
366 | ||
367 | ||
368 | } | |
369 | else { | |
370 | /* | |
371 | * We got a NOT_FOUND during table load or we encountered | |
372 | * a cond_ref_of(x) where the target does not exist. | |
44f6c012 | 373 | * Either case is ok |
1da177e4 LT |
374 | */ |
375 | status = AE_OK; | |
376 | } | |
377 | } | |
378 | } | |
379 | ||
380 | /* | |
381 | * Regardless of success/failure above, | |
382 | * Just initialize the Op with the pathname. | |
383 | */ | |
384 | acpi_ps_init_op (arg, AML_INT_NAMEPATH_OP); | |
385 | arg->common.value.name = path; | |
386 | ||
387 | return_ACPI_STATUS (status); | |
388 | } | |
389 | ||
390 | ||
391 | /******************************************************************************* | |
392 | * | |
393 | * FUNCTION: acpi_ps_get_next_simple_arg | |
394 | * | |
395 | * PARAMETERS: parser_state - Current parser state object | |
396 | * arg_type - The argument type (AML_*_ARG) | |
397 | * Arg - Where the argument is returned | |
398 | * | |
399 | * RETURN: None | |
400 | * | |
401 | * DESCRIPTION: Get the next simple argument (constant, string, or namestring) | |
402 | * | |
403 | ******************************************************************************/ | |
404 | ||
405 | void | |
406 | acpi_ps_get_next_simple_arg ( | |
407 | struct acpi_parse_state *parser_state, | |
408 | u32 arg_type, | |
409 | union acpi_parse_object *arg) | |
410 | { | |
411 | ||
412 | ACPI_FUNCTION_TRACE_U32 ("ps_get_next_simple_arg", arg_type); | |
413 | ||
414 | ||
415 | switch (arg_type) { | |
416 | case ARGP_BYTEDATA: | |
417 | ||
418 | acpi_ps_init_op (arg, AML_BYTE_OP); | |
419 | arg->common.value.integer = (u32) ACPI_GET8 (parser_state->aml); | |
420 | parser_state->aml++; | |
421 | break; | |
422 | ||
423 | ||
424 | case ARGP_WORDDATA: | |
425 | ||
426 | acpi_ps_init_op (arg, AML_WORD_OP); | |
427 | ||
428 | /* Get 2 bytes from the AML stream */ | |
429 | ||
430 | ACPI_MOVE_16_TO_32 (&arg->common.value.integer, parser_state->aml); | |
431 | parser_state->aml += 2; | |
432 | break; | |
433 | ||
434 | ||
435 | case ARGP_DWORDDATA: | |
436 | ||
437 | acpi_ps_init_op (arg, AML_DWORD_OP); | |
438 | ||
439 | /* Get 4 bytes from the AML stream */ | |
440 | ||
441 | ACPI_MOVE_32_TO_32 (&arg->common.value.integer, parser_state->aml); | |
442 | parser_state->aml += 4; | |
443 | break; | |
444 | ||
445 | ||
446 | case ARGP_QWORDDATA: | |
447 | ||
448 | acpi_ps_init_op (arg, AML_QWORD_OP); | |
449 | ||
450 | /* Get 8 bytes from the AML stream */ | |
451 | ||
452 | ACPI_MOVE_64_TO_64 (&arg->common.value.integer, parser_state->aml); | |
453 | parser_state->aml += 8; | |
454 | break; | |
455 | ||
456 | ||
457 | case ARGP_CHARLIST: | |
458 | ||
459 | acpi_ps_init_op (arg, AML_STRING_OP); | |
460 | arg->common.value.string = (char *) parser_state->aml; | |
461 | ||
462 | while (ACPI_GET8 (parser_state->aml) != '\0') { | |
463 | parser_state->aml++; | |
464 | } | |
465 | parser_state->aml++; | |
466 | break; | |
467 | ||
468 | ||
469 | case ARGP_NAME: | |
470 | case ARGP_NAMESTRING: | |
471 | ||
472 | acpi_ps_init_op (arg, AML_INT_NAMEPATH_OP); | |
473 | arg->common.value.name = acpi_ps_get_next_namestring (parser_state); | |
474 | break; | |
475 | ||
476 | ||
477 | default: | |
478 | ||
479 | ACPI_REPORT_ERROR (("Invalid arg_type %X\n", arg_type)); | |
480 | break; | |
481 | } | |
482 | ||
483 | return_VOID; | |
484 | } | |
485 | ||
486 | ||
487 | /******************************************************************************* | |
488 | * | |
489 | * FUNCTION: acpi_ps_get_next_field | |
490 | * | |
491 | * PARAMETERS: parser_state - Current parser state object | |
492 | * | |
493 | * RETURN: A newly allocated FIELD op | |
494 | * | |
495 | * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) | |
496 | * | |
497 | ******************************************************************************/ | |
498 | ||
44f6c012 | 499 | static union acpi_parse_object * |
1da177e4 LT |
500 | acpi_ps_get_next_field ( |
501 | struct acpi_parse_state *parser_state) | |
502 | { | |
44f6c012 RM |
503 | u32 aml_offset = (u32) |
504 | ACPI_PTR_DIFF (parser_state->aml, | |
505 | parser_state->aml_start); | |
1da177e4 LT |
506 | union acpi_parse_object *field; |
507 | u16 opcode; | |
508 | u32 name; | |
509 | ||
510 | ||
511 | ACPI_FUNCTION_TRACE ("ps_get_next_field"); | |
512 | ||
513 | ||
44f6c012 | 514 | /* Determine field type */ |
1da177e4 LT |
515 | |
516 | switch (ACPI_GET8 (parser_state->aml)) { | |
517 | default: | |
518 | ||
519 | opcode = AML_INT_NAMEDFIELD_OP; | |
520 | break; | |
521 | ||
522 | case 0x00: | |
523 | ||
524 | opcode = AML_INT_RESERVEDFIELD_OP; | |
525 | parser_state->aml++; | |
526 | break; | |
527 | ||
528 | case 0x01: | |
529 | ||
530 | opcode = AML_INT_ACCESSFIELD_OP; | |
531 | parser_state->aml++; | |
532 | break; | |
533 | } | |
534 | ||
1da177e4 LT |
535 | /* Allocate a new field op */ |
536 | ||
537 | field = acpi_ps_alloc_op (opcode); | |
538 | if (!field) { | |
539 | return_PTR (NULL); | |
540 | } | |
541 | ||
542 | field->common.aml_offset = aml_offset; | |
543 | ||
544 | /* Decode the field type */ | |
545 | ||
546 | switch (opcode) { | |
547 | case AML_INT_NAMEDFIELD_OP: | |
548 | ||
549 | /* Get the 4-character name */ | |
550 | ||
551 | ACPI_MOVE_32_TO_32 (&name, parser_state->aml); | |
552 | acpi_ps_set_name (field, name); | |
553 | parser_state->aml += ACPI_NAME_SIZE; | |
554 | ||
555 | /* Get the length which is encoded as a package length */ | |
556 | ||
557 | field->common.value.size = acpi_ps_get_next_package_length (parser_state); | |
558 | break; | |
559 | ||
560 | ||
561 | case AML_INT_RESERVEDFIELD_OP: | |
562 | ||
563 | /* Get the length which is encoded as a package length */ | |
564 | ||
565 | field->common.value.size = acpi_ps_get_next_package_length (parser_state); | |
566 | break; | |
567 | ||
568 | ||
569 | case AML_INT_ACCESSFIELD_OP: | |
570 | ||
571 | /* | |
572 | * Get access_type and access_attrib and merge into the field Op | |
573 | * access_type is first operand, access_attribute is second | |
574 | */ | |
575 | field->common.value.integer = (ACPI_GET8 (parser_state->aml) << 8); | |
576 | parser_state->aml++; | |
577 | field->common.value.integer |= ACPI_GET8 (parser_state->aml); | |
578 | parser_state->aml++; | |
579 | break; | |
580 | ||
581 | default: | |
582 | ||
583 | /* Opcode was set in previous switch */ | |
584 | break; | |
585 | } | |
586 | ||
587 | return_PTR (field); | |
588 | } | |
589 | ||
590 | ||
591 | /******************************************************************************* | |
592 | * | |
593 | * FUNCTION: acpi_ps_get_next_arg | |
594 | * | |
44f6c012 RM |
595 | * PARAMETERS: walk_state - Current state |
596 | * parser_state - Current parser state object | |
1da177e4 | 597 | * arg_type - The argument type (AML_*_ARG) |
44f6c012 | 598 | * return_arg - Where the next arg is returned |
1da177e4 LT |
599 | * |
600 | * RETURN: Status, and an op object containing the next argument. | |
601 | * | |
602 | * DESCRIPTION: Get next argument (including complex list arguments that require | |
603 | * pushing the parser stack) | |
604 | * | |
605 | ******************************************************************************/ | |
606 | ||
607 | acpi_status | |
608 | acpi_ps_get_next_arg ( | |
609 | struct acpi_walk_state *walk_state, | |
610 | struct acpi_parse_state *parser_state, | |
611 | u32 arg_type, | |
612 | union acpi_parse_object **return_arg) | |
613 | { | |
614 | union acpi_parse_object *arg = NULL; | |
615 | union acpi_parse_object *prev = NULL; | |
616 | union acpi_parse_object *field; | |
617 | u32 subop; | |
618 | acpi_status status = AE_OK; | |
619 | ||
620 | ||
621 | ACPI_FUNCTION_TRACE_PTR ("ps_get_next_arg", parser_state); | |
622 | ||
623 | ||
624 | switch (arg_type) { | |
625 | case ARGP_BYTEDATA: | |
626 | case ARGP_WORDDATA: | |
627 | case ARGP_DWORDDATA: | |
628 | case ARGP_CHARLIST: | |
629 | case ARGP_NAME: | |
630 | case ARGP_NAMESTRING: | |
631 | ||
44f6c012 | 632 | /* Constants, strings, and namestrings are all the same size */ |
1da177e4 LT |
633 | |
634 | arg = acpi_ps_alloc_op (AML_BYTE_OP); | |
635 | if (!arg) { | |
636 | return_ACPI_STATUS (AE_NO_MEMORY); | |
637 | } | |
638 | acpi_ps_get_next_simple_arg (parser_state, arg_type, arg); | |
639 | break; | |
640 | ||
641 | ||
642 | case ARGP_PKGLENGTH: | |
643 | ||
644 | /* Package length, nothing returned */ | |
645 | ||
646 | parser_state->pkg_end = acpi_ps_get_next_package_end (parser_state); | |
647 | break; | |
648 | ||
649 | ||
650 | case ARGP_FIELDLIST: | |
651 | ||
652 | if (parser_state->aml < parser_state->pkg_end) { | |
653 | /* Non-empty list */ | |
654 | ||
655 | while (parser_state->aml < parser_state->pkg_end) { | |
656 | field = acpi_ps_get_next_field (parser_state); | |
657 | if (!field) { | |
658 | return_ACPI_STATUS (AE_NO_MEMORY); | |
659 | } | |
660 | ||
661 | if (prev) { | |
662 | prev->common.next = field; | |
663 | } | |
664 | else { | |
665 | arg = field; | |
666 | } | |
1da177e4 LT |
667 | prev = field; |
668 | } | |
669 | ||
670 | /* Skip to End of byte data */ | |
671 | ||
672 | parser_state->aml = parser_state->pkg_end; | |
673 | } | |
674 | break; | |
675 | ||
676 | ||
677 | case ARGP_BYTELIST: | |
678 | ||
679 | if (parser_state->aml < parser_state->pkg_end) { | |
680 | /* Non-empty list */ | |
681 | ||
682 | arg = acpi_ps_alloc_op (AML_INT_BYTELIST_OP); | |
683 | if (!arg) { | |
684 | return_ACPI_STATUS (AE_NO_MEMORY); | |
685 | } | |
686 | ||
687 | /* Fill in bytelist data */ | |
688 | ||
44f6c012 RM |
689 | arg->common.value.size = (u32) |
690 | ACPI_PTR_DIFF (parser_state->pkg_end, parser_state->aml); | |
1da177e4 LT |
691 | arg->named.data = parser_state->aml; |
692 | ||
693 | /* Skip to End of byte data */ | |
694 | ||
695 | parser_state->aml = parser_state->pkg_end; | |
696 | } | |
697 | break; | |
698 | ||
699 | ||
700 | case ARGP_TARGET: | |
701 | case ARGP_SUPERNAME: | |
702 | case ARGP_SIMPLENAME: | |
703 | ||
704 | subop = acpi_ps_peek_opcode (parser_state); | |
705 | if (subop == 0 || | |
706 | acpi_ps_is_leading_char (subop) || | |
707 | acpi_ps_is_prefix_char (subop)) { | |
708 | /* null_name or name_string */ | |
709 | ||
710 | arg = acpi_ps_alloc_op (AML_INT_NAMEPATH_OP); | |
711 | if (!arg) { | |
712 | return_ACPI_STATUS (AE_NO_MEMORY); | |
713 | } | |
714 | ||
715 | status = acpi_ps_get_next_namepath (walk_state, parser_state, arg, 0); | |
716 | } | |
717 | else { | |
44f6c012 | 718 | /* Single complex argument, nothing returned */ |
1da177e4 LT |
719 | |
720 | walk_state->arg_count = 1; | |
721 | } | |
722 | break; | |
723 | ||
724 | ||
725 | case ARGP_DATAOBJ: | |
726 | case ARGP_TERMARG: | |
727 | ||
44f6c012 | 728 | /* Single complex argument, nothing returned */ |
1da177e4 LT |
729 | |
730 | walk_state->arg_count = 1; | |
731 | break; | |
732 | ||
733 | ||
734 | case ARGP_DATAOBJLIST: | |
735 | case ARGP_TERMLIST: | |
736 | case ARGP_OBJLIST: | |
737 | ||
738 | if (parser_state->aml < parser_state->pkg_end) { | |
44f6c012 | 739 | /* Non-empty list of variable arguments, nothing returned */ |
1da177e4 LT |
740 | |
741 | walk_state->arg_count = ACPI_VAR_ARGS; | |
742 | } | |
743 | break; | |
744 | ||
745 | ||
746 | default: | |
747 | ||
748 | ACPI_REPORT_ERROR (("Invalid arg_type: %X\n", arg_type)); | |
749 | status = AE_AML_OPERAND_TYPE; | |
750 | break; | |
751 | } | |
752 | ||
753 | *return_arg = arg; | |
754 | return_ACPI_STATUS (status); | |
755 | } |