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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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acparser.h> | |
46 | #include <acpi/amlcode.h> | |
47 | #include <acpi/acnamesp.h> | |
48 | ||
49 | #define _COMPONENT ACPI_PARSER | |
4be44fcd | 50 | ACPI_MODULE_NAME("psargs") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static u32 |
4be44fcd | 54 | acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); |
44f6c012 | 55 | |
4be44fcd LB |
56 | static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state |
57 | *parser_state); | |
1da177e4 LT |
58 | |
59 | /******************************************************************************* | |
60 | * | |
61 | * FUNCTION: acpi_ps_get_next_package_length | |
62 | * | |
63 | * PARAMETERS: parser_state - Current parser state object | |
64 | * | |
65 | * RETURN: Decoded package length. On completion, the AML pointer points | |
66 | * past the length byte or bytes. | |
67 | * | |
68 | * DESCRIPTION: Decode and return a package length field | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
44f6c012 | 72 | static u32 |
4be44fcd | 73 | acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state) |
1da177e4 | 74 | { |
4be44fcd LB |
75 | u32 encoded_length; |
76 | u32 length = 0; | |
1da177e4 | 77 | |
4be44fcd | 78 | ACPI_FUNCTION_TRACE("ps_get_next_package_length"); |
1da177e4 | 79 | |
4be44fcd | 80 | encoded_length = (u32) ACPI_GET8(parser_state->aml); |
1da177e4 LT |
81 | parser_state->aml++; |
82 | ||
4be44fcd LB |
83 | switch (encoded_length >> 6) { /* bits 6-7 contain encoding scheme */ |
84 | case 0: /* 1-byte encoding (bits 0-5) */ | |
1da177e4 LT |
85 | |
86 | length = (encoded_length & 0x3F); | |
87 | break; | |
88 | ||
4be44fcd | 89 | case 1: /* 2-byte encoding (next byte + bits 0-3) */ |
1da177e4 | 90 | |
4be44fcd LB |
91 | length = ((ACPI_GET8(parser_state->aml) << 04) | |
92 | (encoded_length & 0x0F)); | |
1da177e4 LT |
93 | parser_state->aml++; |
94 | break; | |
95 | ||
4be44fcd | 96 | case 2: /* 3-byte encoding (next 2 bytes + bits 0-3) */ |
1da177e4 | 97 | |
4be44fcd LB |
98 | length = ((ACPI_GET8(parser_state->aml + 1) << 12) | |
99 | (ACPI_GET8(parser_state->aml) << 04) | | |
100 | (encoded_length & 0x0F)); | |
1da177e4 LT |
101 | parser_state->aml += 2; |
102 | break; | |
103 | ||
4be44fcd | 104 | case 3: /* 4-byte encoding (next 3 bytes + bits 0-3) */ |
1da177e4 | 105 | |
4be44fcd LB |
106 | length = ((ACPI_GET8(parser_state->aml + 2) << 20) | |
107 | (ACPI_GET8(parser_state->aml + 1) << 12) | | |
108 | (ACPI_GET8(parser_state->aml) << 04) | | |
109 | (encoded_length & 0x0F)); | |
1da177e4 LT |
110 | parser_state->aml += 3; |
111 | break; | |
112 | ||
113 | default: | |
114 | ||
115 | /* Can't get here, only 2 bits / 4 cases */ | |
116 | break; | |
117 | } | |
118 | ||
50eca3eb | 119 | return_UINT32(length); |
1da177e4 LT |
120 | } |
121 | ||
1da177e4 LT |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_ps_get_next_package_end | |
125 | * | |
126 | * PARAMETERS: parser_state - Current parser state object | |
127 | * | |
128 | * RETURN: Pointer to end-of-package +1 | |
129 | * | |
130 | * DESCRIPTION: Get next package length and return a pointer past the end of | |
131 | * the package. Consumes the package length field | |
132 | * | |
133 | ******************************************************************************/ | |
134 | ||
4be44fcd | 135 | u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state) |
1da177e4 | 136 | { |
4be44fcd LB |
137 | u8 *start = parser_state->aml; |
138 | acpi_native_uint length; | |
1da177e4 | 139 | |
4be44fcd | 140 | ACPI_FUNCTION_TRACE("ps_get_next_package_end"); |
1da177e4 LT |
141 | |
142 | /* Function below changes parser_state->Aml */ | |
143 | ||
4be44fcd LB |
144 | length = |
145 | (acpi_native_uint) acpi_ps_get_next_package_length(parser_state); | |
1da177e4 | 146 | |
4be44fcd | 147 | return_PTR(start + length); /* end of package */ |
1da177e4 LT |
148 | } |
149 | ||
1da177e4 LT |
150 | /******************************************************************************* |
151 | * | |
152 | * FUNCTION: acpi_ps_get_next_namestring | |
153 | * | |
154 | * PARAMETERS: parser_state - Current parser state object | |
155 | * | |
156 | * RETURN: Pointer to the start of the name string (pointer points into | |
157 | * the AML. | |
158 | * | |
159 | * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name | |
160 | * prefix characters. Set parser state to point past the string. | |
161 | * (Name is consumed from the AML.) | |
162 | * | |
163 | ******************************************************************************/ | |
164 | ||
4be44fcd | 165 | char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state) |
1da177e4 | 166 | { |
4be44fcd LB |
167 | u8 *start = parser_state->aml; |
168 | u8 *end = parser_state->aml; | |
1da177e4 | 169 | |
4be44fcd | 170 | ACPI_FUNCTION_TRACE("ps_get_next_namestring"); |
1da177e4 LT |
171 | |
172 | /* Handle multiple prefix characters */ | |
173 | ||
4be44fcd | 174 | while (acpi_ps_is_prefix_char(ACPI_GET8(end))) { |
1da177e4 LT |
175 | /* Include prefix '\\' or '^' */ |
176 | ||
177 | end++; | |
178 | } | |
179 | ||
180 | /* Decode the path */ | |
181 | ||
4be44fcd | 182 | switch (ACPI_GET8(end)) { |
1da177e4 LT |
183 | case 0: |
184 | ||
185 | /* null_name */ | |
186 | ||
187 | if (end == start) { | |
188 | start = NULL; | |
189 | } | |
190 | end++; | |
191 | break; | |
192 | ||
193 | case AML_DUAL_NAME_PREFIX: | |
194 | ||
195 | /* Two name segments */ | |
196 | ||
197 | end += 1 + (2 * ACPI_NAME_SIZE); | |
198 | break; | |
199 | ||
200 | case AML_MULTI_NAME_PREFIX_OP: | |
201 | ||
202 | /* Multiple name segments, 4 chars each */ | |
203 | ||
4be44fcd | 204 | end += 2 + ((acpi_size) ACPI_GET8(end + 1) * ACPI_NAME_SIZE); |
1da177e4 LT |
205 | break; |
206 | ||
207 | default: | |
208 | ||
209 | /* Single name segment */ | |
210 | ||
211 | end += ACPI_NAME_SIZE; | |
212 | break; | |
213 | } | |
214 | ||
4be44fcd LB |
215 | parser_state->aml = (u8 *) end; |
216 | return_PTR((char *)start); | |
1da177e4 LT |
217 | } |
218 | ||
1da177e4 LT |
219 | /******************************************************************************* |
220 | * | |
221 | * FUNCTION: acpi_ps_get_next_namepath | |
222 | * | |
223 | * PARAMETERS: parser_state - Current parser state object | |
224 | * Arg - Where the namepath will be stored | |
225 | * arg_count - If the namepath points to a control method | |
226 | * the method's argument is returned here. | |
227 | * method_call - Whether the namepath can possibly be the | |
228 | * start of a method call | |
229 | * | |
230 | * RETURN: Status | |
231 | * | |
232 | * DESCRIPTION: Get next name (if method call, return # of required args). | |
233 | * Names are looked up in the internal namespace to determine | |
234 | * if the name represents a control method. If a method | |
235 | * is found, the number of arguments to the method is returned. | |
236 | * This information is critical for parsing to continue correctly. | |
237 | * | |
238 | ******************************************************************************/ | |
239 | ||
240 | acpi_status | |
4be44fcd LB |
241 | acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state, |
242 | struct acpi_parse_state *parser_state, | |
243 | union acpi_parse_object *arg, u8 method_call) | |
1da177e4 | 244 | { |
4be44fcd LB |
245 | char *path; |
246 | union acpi_parse_object *name_op; | |
247 | acpi_status status = AE_OK; | |
248 | union acpi_operand_object *method_desc; | |
249 | struct acpi_namespace_node *node; | |
250 | union acpi_generic_state scope_info; | |
1da177e4 | 251 | |
4be44fcd | 252 | ACPI_FUNCTION_TRACE("ps_get_next_namepath"); |
1da177e4 | 253 | |
4be44fcd | 254 | path = acpi_ps_get_next_namestring(parser_state); |
1da177e4 LT |
255 | |
256 | /* Null path case is allowed */ | |
257 | ||
258 | if (path) { | |
259 | /* | |
260 | * Lookup the name in the internal namespace | |
261 | */ | |
262 | scope_info.scope.node = NULL; | |
263 | node = parser_state->start_node; | |
264 | if (node) { | |
265 | scope_info.scope.node = node; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Lookup object. We don't want to add anything new to the namespace | |
270 | * here, however. So we use MODE_EXECUTE. Allow searching of the | |
271 | * parent tree, but don't open a new scope -- we just want to lookup the | |
272 | * object (MUST BE mode EXECUTE to perform upsearch) | |
273 | */ | |
4be44fcd LB |
274 | status = acpi_ns_lookup(&scope_info, path, ACPI_TYPE_ANY, |
275 | ACPI_IMODE_EXECUTE, | |
276 | ACPI_NS_SEARCH_PARENT | | |
277 | ACPI_NS_DONT_OPEN_SCOPE, NULL, &node); | |
278 | if (ACPI_SUCCESS(status) && method_call) { | |
1da177e4 | 279 | if (node->type == ACPI_TYPE_METHOD) { |
44f6c012 RM |
280 | /* This name is actually a control method invocation */ |
281 | ||
4be44fcd LB |
282 | method_desc = acpi_ns_get_attached_object(node); |
283 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
284 | "Control Method - %p Desc %p Path=%p\n", | |
285 | node, method_desc, path)); | |
1da177e4 | 286 | |
4be44fcd | 287 | name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP); |
1da177e4 | 288 | if (!name_op) { |
4be44fcd | 289 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
290 | } |
291 | ||
292 | /* Change arg into a METHOD CALL and attach name to it */ | |
293 | ||
4be44fcd | 294 | acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); |
1da177e4 LT |
295 | name_op->common.value.name = path; |
296 | ||
297 | /* Point METHODCALL/NAME to the METHOD Node */ | |
298 | ||
299 | name_op->common.node = node; | |
4be44fcd | 300 | acpi_ps_append_arg(arg, name_op); |
1da177e4 LT |
301 | |
302 | if (!method_desc) { | |
4be44fcd LB |
303 | ACPI_REPORT_ERROR(("ps_get_next_namepath: Control Method %p has no attached object\n", node)); |
304 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
1da177e4 LT |
305 | } |
306 | ||
4be44fcd LB |
307 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
308 | "Control Method - %p Args %X\n", | |
309 | node, | |
310 | method_desc->method. | |
311 | param_count)); | |
1da177e4 LT |
312 | |
313 | /* Get the number of arguments to expect */ | |
314 | ||
4be44fcd LB |
315 | walk_state->arg_count = |
316 | method_desc->method.param_count; | |
317 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
318 | } |
319 | ||
320 | /* | |
321 | * Else this is normal named object reference. | |
322 | * Just init the NAMEPATH object with the pathname. | |
323 | * (See code below) | |
324 | */ | |
325 | } | |
326 | ||
4be44fcd | 327 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
328 | /* |
329 | * 1) Any error other than NOT_FOUND is always severe | |
330 | * 2) NOT_FOUND is only important if we are executing a method. | |
331 | * 3) If executing a cond_ref_of opcode, NOT_FOUND is ok. | |
332 | */ | |
4be44fcd LB |
333 | if ((((walk_state-> |
334 | parse_flags & ACPI_PARSE_MODE_MASK) == | |
335 | ACPI_PARSE_EXECUTE) && (status == AE_NOT_FOUND) | |
336 | && (walk_state->op->common.aml_opcode != | |
337 | AML_COND_REF_OF_OP)) | |
338 | || (status != AE_NOT_FOUND)) { | |
339 | ACPI_REPORT_NSERROR(path, status); | |
340 | ||
341 | acpi_os_printf | |
342 | ("search_node %p start_node %p return_node %p\n", | |
343 | scope_info.scope.node, | |
344 | parser_state->start_node, node); | |
345 | ||
346 | } else { | |
1da177e4 LT |
347 | /* |
348 | * We got a NOT_FOUND during table load or we encountered | |
349 | * a cond_ref_of(x) where the target does not exist. | |
44f6c012 | 350 | * Either case is ok |
1da177e4 LT |
351 | */ |
352 | status = AE_OK; | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
357 | /* | |
358 | * Regardless of success/failure above, | |
359 | * Just initialize the Op with the pathname. | |
360 | */ | |
4be44fcd | 361 | acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); |
1da177e4 LT |
362 | arg->common.value.name = path; |
363 | ||
4be44fcd | 364 | return_ACPI_STATUS(status); |
1da177e4 LT |
365 | } |
366 | ||
1da177e4 LT |
367 | /******************************************************************************* |
368 | * | |
369 | * FUNCTION: acpi_ps_get_next_simple_arg | |
370 | * | |
371 | * PARAMETERS: parser_state - Current parser state object | |
372 | * arg_type - The argument type (AML_*_ARG) | |
373 | * Arg - Where the argument is returned | |
374 | * | |
375 | * RETURN: None | |
376 | * | |
377 | * DESCRIPTION: Get the next simple argument (constant, string, or namestring) | |
378 | * | |
379 | ******************************************************************************/ | |
380 | ||
381 | void | |
4be44fcd LB |
382 | acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, |
383 | u32 arg_type, union acpi_parse_object *arg) | |
1da177e4 LT |
384 | { |
385 | ||
4be44fcd | 386 | ACPI_FUNCTION_TRACE_U32("ps_get_next_simple_arg", arg_type); |
1da177e4 LT |
387 | |
388 | switch (arg_type) { | |
389 | case ARGP_BYTEDATA: | |
390 | ||
4be44fcd LB |
391 | acpi_ps_init_op(arg, AML_BYTE_OP); |
392 | arg->common.value.integer = (u32) ACPI_GET8(parser_state->aml); | |
1da177e4 LT |
393 | parser_state->aml++; |
394 | break; | |
395 | ||
1da177e4 LT |
396 | case ARGP_WORDDATA: |
397 | ||
4be44fcd | 398 | acpi_ps_init_op(arg, AML_WORD_OP); |
1da177e4 LT |
399 | |
400 | /* Get 2 bytes from the AML stream */ | |
401 | ||
4be44fcd LB |
402 | ACPI_MOVE_16_TO_32(&arg->common.value.integer, |
403 | parser_state->aml); | |
1da177e4 LT |
404 | parser_state->aml += 2; |
405 | break; | |
406 | ||
1da177e4 LT |
407 | case ARGP_DWORDDATA: |
408 | ||
4be44fcd | 409 | acpi_ps_init_op(arg, AML_DWORD_OP); |
1da177e4 LT |
410 | |
411 | /* Get 4 bytes from the AML stream */ | |
412 | ||
4be44fcd LB |
413 | ACPI_MOVE_32_TO_32(&arg->common.value.integer, |
414 | parser_state->aml); | |
1da177e4 LT |
415 | parser_state->aml += 4; |
416 | break; | |
417 | ||
1da177e4 LT |
418 | case ARGP_QWORDDATA: |
419 | ||
4be44fcd | 420 | acpi_ps_init_op(arg, AML_QWORD_OP); |
1da177e4 LT |
421 | |
422 | /* Get 8 bytes from the AML stream */ | |
423 | ||
4be44fcd LB |
424 | ACPI_MOVE_64_TO_64(&arg->common.value.integer, |
425 | parser_state->aml); | |
1da177e4 LT |
426 | parser_state->aml += 8; |
427 | break; | |
428 | ||
1da177e4 LT |
429 | case ARGP_CHARLIST: |
430 | ||
4be44fcd LB |
431 | acpi_ps_init_op(arg, AML_STRING_OP); |
432 | arg->common.value.string = (char *)parser_state->aml; | |
1da177e4 | 433 | |
4be44fcd | 434 | while (ACPI_GET8(parser_state->aml) != '\0') { |
1da177e4 LT |
435 | parser_state->aml++; |
436 | } | |
437 | parser_state->aml++; | |
438 | break; | |
439 | ||
1da177e4 LT |
440 | case ARGP_NAME: |
441 | case ARGP_NAMESTRING: | |
442 | ||
4be44fcd LB |
443 | acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); |
444 | arg->common.value.name = | |
445 | acpi_ps_get_next_namestring(parser_state); | |
1da177e4 LT |
446 | break; |
447 | ||
1da177e4 LT |
448 | default: |
449 | ||
4be44fcd | 450 | ACPI_REPORT_ERROR(("Invalid arg_type %X\n", arg_type)); |
1da177e4 LT |
451 | break; |
452 | } | |
453 | ||
454 | return_VOID; | |
455 | } | |
456 | ||
1da177e4 LT |
457 | /******************************************************************************* |
458 | * | |
459 | * FUNCTION: acpi_ps_get_next_field | |
460 | * | |
461 | * PARAMETERS: parser_state - Current parser state object | |
462 | * | |
463 | * RETURN: A newly allocated FIELD op | |
464 | * | |
465 | * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) | |
466 | * | |
467 | ******************************************************************************/ | |
468 | ||
4be44fcd LB |
469 | static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state |
470 | *parser_state) | |
1da177e4 | 471 | { |
4be44fcd LB |
472 | u32 aml_offset = (u32) |
473 | ACPI_PTR_DIFF(parser_state->aml, | |
474 | parser_state->aml_start); | |
475 | union acpi_parse_object *field; | |
476 | u16 opcode; | |
477 | u32 name; | |
1da177e4 | 478 | |
4be44fcd | 479 | ACPI_FUNCTION_TRACE("ps_get_next_field"); |
1da177e4 | 480 | |
44f6c012 | 481 | /* Determine field type */ |
1da177e4 | 482 | |
4be44fcd | 483 | switch (ACPI_GET8(parser_state->aml)) { |
1da177e4 LT |
484 | default: |
485 | ||
486 | opcode = AML_INT_NAMEDFIELD_OP; | |
487 | break; | |
488 | ||
489 | case 0x00: | |
490 | ||
491 | opcode = AML_INT_RESERVEDFIELD_OP; | |
492 | parser_state->aml++; | |
493 | break; | |
494 | ||
495 | case 0x01: | |
496 | ||
497 | opcode = AML_INT_ACCESSFIELD_OP; | |
498 | parser_state->aml++; | |
499 | break; | |
500 | } | |
501 | ||
1da177e4 LT |
502 | /* Allocate a new field op */ |
503 | ||
4be44fcd | 504 | field = acpi_ps_alloc_op(opcode); |
1da177e4 | 505 | if (!field) { |
4be44fcd | 506 | return_PTR(NULL); |
1da177e4 LT |
507 | } |
508 | ||
509 | field->common.aml_offset = aml_offset; | |
510 | ||
511 | /* Decode the field type */ | |
512 | ||
513 | switch (opcode) { | |
514 | case AML_INT_NAMEDFIELD_OP: | |
515 | ||
516 | /* Get the 4-character name */ | |
517 | ||
4be44fcd LB |
518 | ACPI_MOVE_32_TO_32(&name, parser_state->aml); |
519 | acpi_ps_set_name(field, name); | |
1da177e4 LT |
520 | parser_state->aml += ACPI_NAME_SIZE; |
521 | ||
522 | /* Get the length which is encoded as a package length */ | |
523 | ||
4be44fcd LB |
524 | field->common.value.size = |
525 | acpi_ps_get_next_package_length(parser_state); | |
1da177e4 LT |
526 | break; |
527 | ||
1da177e4 LT |
528 | case AML_INT_RESERVEDFIELD_OP: |
529 | ||
530 | /* Get the length which is encoded as a package length */ | |
531 | ||
4be44fcd LB |
532 | field->common.value.size = |
533 | acpi_ps_get_next_package_length(parser_state); | |
1da177e4 LT |
534 | break; |
535 | ||
1da177e4 LT |
536 | case AML_INT_ACCESSFIELD_OP: |
537 | ||
538 | /* | |
539 | * Get access_type and access_attrib and merge into the field Op | |
540 | * access_type is first operand, access_attribute is second | |
541 | */ | |
4be44fcd LB |
542 | field->common.value.integer = |
543 | (ACPI_GET8(parser_state->aml) << 8); | |
1da177e4 | 544 | parser_state->aml++; |
4be44fcd | 545 | field->common.value.integer |= ACPI_GET8(parser_state->aml); |
1da177e4 LT |
546 | parser_state->aml++; |
547 | break; | |
548 | ||
549 | default: | |
550 | ||
551 | /* Opcode was set in previous switch */ | |
552 | break; | |
553 | } | |
554 | ||
4be44fcd | 555 | return_PTR(field); |
1da177e4 LT |
556 | } |
557 | ||
1da177e4 LT |
558 | /******************************************************************************* |
559 | * | |
560 | * FUNCTION: acpi_ps_get_next_arg | |
561 | * | |
44f6c012 RM |
562 | * PARAMETERS: walk_state - Current state |
563 | * parser_state - Current parser state object | |
1da177e4 | 564 | * arg_type - The argument type (AML_*_ARG) |
44f6c012 | 565 | * return_arg - Where the next arg is returned |
1da177e4 LT |
566 | * |
567 | * RETURN: Status, and an op object containing the next argument. | |
568 | * | |
569 | * DESCRIPTION: Get next argument (including complex list arguments that require | |
570 | * pushing the parser stack) | |
571 | * | |
572 | ******************************************************************************/ | |
573 | ||
574 | acpi_status | |
4be44fcd LB |
575 | acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, |
576 | struct acpi_parse_state *parser_state, | |
577 | u32 arg_type, union acpi_parse_object **return_arg) | |
1da177e4 | 578 | { |
4be44fcd LB |
579 | union acpi_parse_object *arg = NULL; |
580 | union acpi_parse_object *prev = NULL; | |
581 | union acpi_parse_object *field; | |
582 | u32 subop; | |
583 | acpi_status status = AE_OK; | |
1da177e4 | 584 | |
4be44fcd | 585 | ACPI_FUNCTION_TRACE_PTR("ps_get_next_arg", parser_state); |
1da177e4 LT |
586 | |
587 | switch (arg_type) { | |
588 | case ARGP_BYTEDATA: | |
589 | case ARGP_WORDDATA: | |
590 | case ARGP_DWORDDATA: | |
591 | case ARGP_CHARLIST: | |
592 | case ARGP_NAME: | |
593 | case ARGP_NAMESTRING: | |
594 | ||
44f6c012 | 595 | /* Constants, strings, and namestrings are all the same size */ |
1da177e4 | 596 | |
4be44fcd | 597 | arg = acpi_ps_alloc_op(AML_BYTE_OP); |
1da177e4 | 598 | if (!arg) { |
4be44fcd | 599 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 | 600 | } |
4be44fcd | 601 | acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); |
1da177e4 LT |
602 | break; |
603 | ||
1da177e4 LT |
604 | case ARGP_PKGLENGTH: |
605 | ||
606 | /* Package length, nothing returned */ | |
607 | ||
4be44fcd LB |
608 | parser_state->pkg_end = |
609 | acpi_ps_get_next_package_end(parser_state); | |
1da177e4 LT |
610 | break; |
611 | ||
1da177e4 LT |
612 | case ARGP_FIELDLIST: |
613 | ||
614 | if (parser_state->aml < parser_state->pkg_end) { | |
615 | /* Non-empty list */ | |
616 | ||
617 | while (parser_state->aml < parser_state->pkg_end) { | |
4be44fcd | 618 | field = acpi_ps_get_next_field(parser_state); |
1da177e4 | 619 | if (!field) { |
4be44fcd | 620 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
621 | } |
622 | ||
623 | if (prev) { | |
624 | prev->common.next = field; | |
4be44fcd | 625 | } else { |
1da177e4 LT |
626 | arg = field; |
627 | } | |
1da177e4 LT |
628 | prev = field; |
629 | } | |
630 | ||
631 | /* Skip to End of byte data */ | |
632 | ||
633 | parser_state->aml = parser_state->pkg_end; | |
634 | } | |
635 | break; | |
636 | ||
1da177e4 LT |
637 | case ARGP_BYTELIST: |
638 | ||
639 | if (parser_state->aml < parser_state->pkg_end) { | |
640 | /* Non-empty list */ | |
641 | ||
4be44fcd | 642 | arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP); |
1da177e4 | 643 | if (!arg) { |
4be44fcd | 644 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
645 | } |
646 | ||
647 | /* Fill in bytelist data */ | |
648 | ||
44f6c012 | 649 | arg->common.value.size = (u32) |
4be44fcd LB |
650 | ACPI_PTR_DIFF(parser_state->pkg_end, |
651 | parser_state->aml); | |
1da177e4 LT |
652 | arg->named.data = parser_state->aml; |
653 | ||
654 | /* Skip to End of byte data */ | |
655 | ||
656 | parser_state->aml = parser_state->pkg_end; | |
657 | } | |
658 | break; | |
659 | ||
1da177e4 LT |
660 | case ARGP_TARGET: |
661 | case ARGP_SUPERNAME: | |
662 | case ARGP_SIMPLENAME: | |
663 | ||
4be44fcd LB |
664 | subop = acpi_ps_peek_opcode(parser_state); |
665 | if (subop == 0 || | |
666 | acpi_ps_is_leading_char(subop) || | |
667 | acpi_ps_is_prefix_char(subop)) { | |
1da177e4 LT |
668 | /* null_name or name_string */ |
669 | ||
4be44fcd | 670 | arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP); |
1da177e4 | 671 | if (!arg) { |
4be44fcd | 672 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
673 | } |
674 | ||
4be44fcd LB |
675 | status = |
676 | acpi_ps_get_next_namepath(walk_state, parser_state, | |
677 | arg, 0); | |
678 | } else { | |
44f6c012 | 679 | /* Single complex argument, nothing returned */ |
1da177e4 LT |
680 | |
681 | walk_state->arg_count = 1; | |
682 | } | |
683 | break; | |
684 | ||
1da177e4 LT |
685 | case ARGP_DATAOBJ: |
686 | case ARGP_TERMARG: | |
687 | ||
44f6c012 | 688 | /* Single complex argument, nothing returned */ |
1da177e4 LT |
689 | |
690 | walk_state->arg_count = 1; | |
691 | break; | |
692 | ||
1da177e4 LT |
693 | case ARGP_DATAOBJLIST: |
694 | case ARGP_TERMLIST: | |
695 | case ARGP_OBJLIST: | |
696 | ||
697 | if (parser_state->aml < parser_state->pkg_end) { | |
44f6c012 | 698 | /* Non-empty list of variable arguments, nothing returned */ |
1da177e4 LT |
699 | |
700 | walk_state->arg_count = ACPI_VAR_ARGS; | |
701 | } | |
702 | break; | |
703 | ||
1da177e4 LT |
704 | default: |
705 | ||
4be44fcd | 706 | ACPI_REPORT_ERROR(("Invalid arg_type: %X\n", arg_type)); |
1da177e4 LT |
707 | status = AE_AML_OPERAND_TYPE; |
708 | break; | |
709 | } | |
710 | ||
711 | *return_arg = arg; | |
4be44fcd | 712 | return_ACPI_STATUS(status); |
1da177e4 | 713 | } |