Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsfield - Dispatcher field routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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/amlcode.h> | |
46 | #include <acpi/acdispat.h> | |
47 | #include <acpi/acinterp.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | #include <acpi/acparser.h> | |
50 | ||
1da177e4 | 51 | #define _COMPONENT ACPI_DISPATCHER |
4be44fcd | 52 | ACPI_MODULE_NAME("dsfield") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local prototypes */ |
44f6c012 | 55 | static acpi_status |
4be44fcd LB |
56 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
57 | struct acpi_walk_state *walk_state, | |
58 | union acpi_parse_object *arg); | |
1da177e4 LT |
59 | |
60 | /******************************************************************************* | |
61 | * | |
62 | * FUNCTION: acpi_ds_create_buffer_field | |
63 | * | |
44f6c012 | 64 | * PARAMETERS: Op - Current parse op (create_xXField) |
1da177e4 LT |
65 | * walk_state - Current state |
66 | * | |
67 | * RETURN: Status | |
68 | * | |
69 | * DESCRIPTION: Execute the create_field operators: | |
70 | * create_bit_field_op, | |
71 | * create_byte_field_op, | |
72 | * create_word_field_op, | |
73 | * create_dword_field_op, | |
74 | * create_qword_field_op, | |
44f6c012 | 75 | * create_field_op (all of which define a field in a buffer) |
1da177e4 LT |
76 | * |
77 | ******************************************************************************/ | |
78 | ||
79 | acpi_status | |
4be44fcd LB |
80 | acpi_ds_create_buffer_field(union acpi_parse_object *op, |
81 | struct acpi_walk_state *walk_state) | |
1da177e4 | 82 | { |
4be44fcd LB |
83 | union acpi_parse_object *arg; |
84 | struct acpi_namespace_node *node; | |
85 | acpi_status status; | |
86 | union acpi_operand_object *obj_desc; | |
87 | union acpi_operand_object *second_desc = NULL; | |
88 | u32 flags; | |
1da177e4 | 89 | |
4be44fcd | 90 | ACPI_FUNCTION_TRACE("ds_create_buffer_field"); |
1da177e4 LT |
91 | |
92 | /* Get the name_string argument */ | |
93 | ||
94 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { | |
4be44fcd LB |
95 | arg = acpi_ps_get_arg(op, 3); |
96 | } else { | |
1da177e4 LT |
97 | /* Create Bit/Byte/Word/Dword field */ |
98 | ||
4be44fcd | 99 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
100 | } |
101 | ||
102 | if (!arg) { | |
4be44fcd | 103 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
104 | } |
105 | ||
106 | if (walk_state->deferred_node) { | |
107 | node = walk_state->deferred_node; | |
108 | status = AE_OK; | |
4be44fcd | 109 | } else { |
1da177e4 LT |
110 | /* |
111 | * During the load phase, we want to enter the name of the field into | |
112 | * the namespace. During the execute phase (when we evaluate the size | |
113 | * operand), we want to lookup the name | |
114 | */ | |
115 | if (walk_state->parse_flags & ACPI_PARSE_EXECUTE) { | |
116 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE; | |
4be44fcd | 117 | } else { |
44f6c012 | 118 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | |
4be44fcd | 119 | ACPI_NS_ERROR_IF_FOUND; |
1da177e4 LT |
120 | } |
121 | ||
122 | /* | |
123 | * Enter the name_string into the namespace | |
124 | */ | |
4be44fcd LB |
125 | status = |
126 | acpi_ns_lookup(walk_state->scope_info, | |
127 | arg->common.value.string, ACPI_TYPE_ANY, | |
128 | ACPI_IMODE_LOAD_PASS1, flags, walk_state, | |
129 | &(node)); | |
130 | if (ACPI_FAILURE(status)) { | |
131 | ACPI_REPORT_NSERROR(arg->common.value.string, status); | |
132 | return_ACPI_STATUS(status); | |
1da177e4 LT |
133 | } |
134 | } | |
135 | ||
44f6c012 RM |
136 | /* We could put the returned object (Node) on the object stack for later, |
137 | * but for now, we will put it in the "op" object that the parser uses, | |
138 | * so we can get it again at the end of this scope | |
1da177e4 LT |
139 | */ |
140 | op->common.node = node; | |
141 | ||
142 | /* | |
44f6c012 RM |
143 | * If there is no object attached to the node, this node was just created |
144 | * and we need to create the field object. Otherwise, this was a lookup | |
145 | * of an existing node and we don't want to create the field object again. | |
1da177e4 | 146 | */ |
4be44fcd | 147 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 148 | if (obj_desc) { |
4be44fcd | 149 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
150 | } |
151 | ||
152 | /* | |
153 | * The Field definition is not fully parsed at this time. | |
154 | * (We must save the address of the AML for the buffer and index operands) | |
155 | */ | |
156 | ||
157 | /* Create the buffer field object */ | |
158 | ||
4be44fcd | 159 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); |
1da177e4 LT |
160 | if (!obj_desc) { |
161 | status = AE_NO_MEMORY; | |
162 | goto cleanup; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Remember location in AML stream of the field unit | |
167 | * opcode and operands -- since the buffer and index | |
168 | * operands must be evaluated. | |
169 | */ | |
4be44fcd | 170 | second_desc = obj_desc->common.next_object; |
1da177e4 LT |
171 | second_desc->extra.aml_start = op->named.data; |
172 | second_desc->extra.aml_length = op->named.length; | |
173 | obj_desc->buffer_field.node = node; | |
174 | ||
175 | /* Attach constructed field descriptors to parent node */ | |
176 | ||
4be44fcd LB |
177 | status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); |
178 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
179 | goto cleanup; |
180 | } | |
181 | ||
4be44fcd | 182 | cleanup: |
1da177e4 LT |
183 | |
184 | /* Remove local reference to the object */ | |
185 | ||
4be44fcd LB |
186 | acpi_ut_remove_reference(obj_desc); |
187 | return_ACPI_STATUS(status); | |
1da177e4 LT |
188 | } |
189 | ||
1da177e4 LT |
190 | /******************************************************************************* |
191 | * | |
192 | * FUNCTION: acpi_ds_get_field_names | |
193 | * | |
194 | * PARAMETERS: Info - create_field info structure | |
195 | * ` walk_state - Current method state | |
196 | * Arg - First parser arg for the field name list | |
197 | * | |
198 | * RETURN: Status | |
199 | * | |
200 | * DESCRIPTION: Process all named fields in a field declaration. Names are | |
201 | * entered into the namespace. | |
202 | * | |
203 | ******************************************************************************/ | |
204 | ||
44f6c012 | 205 | static acpi_status |
4be44fcd LB |
206 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
207 | struct acpi_walk_state *walk_state, | |
208 | union acpi_parse_object *arg) | |
1da177e4 | 209 | { |
4be44fcd LB |
210 | acpi_status status; |
211 | acpi_integer position; | |
1da177e4 | 212 | |
4be44fcd | 213 | ACPI_FUNCTION_TRACE_PTR("ds_get_field_names", info); |
1da177e4 LT |
214 | |
215 | /* First field starts at bit zero */ | |
216 | ||
217 | info->field_bit_position = 0; | |
218 | ||
219 | /* Process all elements in the field list (of parse nodes) */ | |
220 | ||
221 | while (arg) { | |
222 | /* | |
223 | * Three types of field elements are handled: | |
224 | * 1) Offset - specifies a bit offset | |
225 | * 2) access_as - changes the access mode | |
226 | * 3) Name - Enters a new named field into the namespace | |
227 | */ | |
228 | switch (arg->common.aml_opcode) { | |
229 | case AML_INT_RESERVEDFIELD_OP: | |
230 | ||
231 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 232 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
233 | |
234 | if (position > ACPI_UINT32_MAX) { | |
4be44fcd LB |
235 | ACPI_REPORT_ERROR(("Bit offset within field too large (> 0xFFFFFFFF)\n")); |
236 | return_ACPI_STATUS(AE_SUPPORT); | |
1da177e4 LT |
237 | } |
238 | ||
239 | info->field_bit_position = (u32) position; | |
240 | break; | |
241 | ||
1da177e4 LT |
242 | case AML_INT_ACCESSFIELD_OP: |
243 | ||
244 | /* | |
245 | * Get a new access_type and access_attribute -- to be used for all | |
44f6c012 RM |
246 | * field units that follow, until field end or another access_as |
247 | * keyword. | |
1da177e4 | 248 | * |
44f6c012 RM |
249 | * In field_flags, preserve the flag bits other than the |
250 | * ACCESS_TYPE bits | |
1da177e4 | 251 | */ |
44f6c012 | 252 | info->field_flags = (u8) |
4be44fcd LB |
253 | ((info-> |
254 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | | |
255 | ((u8) ((u32) arg->common.value.integer >> 8))); | |
1da177e4 LT |
256 | |
257 | info->attribute = (u8) (arg->common.value.integer); | |
258 | break; | |
259 | ||
1da177e4 LT |
260 | case AML_INT_NAMEDFIELD_OP: |
261 | ||
262 | /* Lookup the name */ | |
263 | ||
4be44fcd LB |
264 | status = acpi_ns_lookup(walk_state->scope_info, |
265 | (char *)&arg->named.name, | |
266 | info->field_type, | |
267 | ACPI_IMODE_EXECUTE, | |
268 | ACPI_NS_DONT_OPEN_SCOPE, | |
269 | walk_state, &info->field_node); | |
270 | if (ACPI_FAILURE(status)) { | |
271 | ACPI_REPORT_NSERROR((char *)&arg->named.name, | |
272 | status); | |
1da177e4 | 273 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 274 | return_ACPI_STATUS(status); |
1da177e4 LT |
275 | } |
276 | ||
277 | /* Already exists, ignore error */ | |
4be44fcd | 278 | } else { |
1da177e4 LT |
279 | arg->common.node = info->field_node; |
280 | info->field_bit_length = arg->common.value.size; | |
281 | ||
282 | /* Create and initialize an object for the new Field Node */ | |
283 | ||
4be44fcd LB |
284 | status = acpi_ex_prep_field_value(info); |
285 | if (ACPI_FAILURE(status)) { | |
286 | return_ACPI_STATUS(status); | |
1da177e4 LT |
287 | } |
288 | } | |
289 | ||
290 | /* Keep track of bit position for the next field */ | |
291 | ||
292 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 293 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
294 | |
295 | if (position > ACPI_UINT32_MAX) { | |
4a90c7e8 | 296 | ACPI_REPORT_ERROR(("Field [%4.4s] bit offset too large (> 0xFFFFFFFF)\n", ACPI_CAST_PTR(char, &info->field_node->name))); |
4be44fcd | 297 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
298 | } |
299 | ||
300 | info->field_bit_position += info->field_bit_length; | |
301 | break; | |
302 | ||
1da177e4 LT |
303 | default: |
304 | ||
4a90c7e8 BM |
305 | ACPI_REPORT_ERROR(("Invalid opcode in field list: %X\n", |
306 | arg->common.aml_opcode)); | |
4be44fcd | 307 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
308 | } |
309 | ||
310 | arg = arg->common.next; | |
311 | } | |
312 | ||
4be44fcd | 313 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
314 | } |
315 | ||
1da177e4 LT |
316 | /******************************************************************************* |
317 | * | |
318 | * FUNCTION: acpi_ds_create_field | |
319 | * | |
320 | * PARAMETERS: Op - Op containing the Field definition and args | |
321 | * region_node - Object for the containing Operation Region | |
322 | * ` walk_state - Current method state | |
323 | * | |
324 | * RETURN: Status | |
325 | * | |
326 | * DESCRIPTION: Create a new field in the specified operation region | |
327 | * | |
328 | ******************************************************************************/ | |
329 | ||
330 | acpi_status | |
4be44fcd LB |
331 | acpi_ds_create_field(union acpi_parse_object *op, |
332 | struct acpi_namespace_node *region_node, | |
333 | struct acpi_walk_state *walk_state) | |
1da177e4 | 334 | { |
4be44fcd LB |
335 | acpi_status status; |
336 | union acpi_parse_object *arg; | |
337 | struct acpi_create_field_info info; | |
1da177e4 | 338 | |
4be44fcd | 339 | ACPI_FUNCTION_TRACE_PTR("ds_create_field", op); |
1da177e4 LT |
340 | |
341 | /* First arg is the name of the parent op_region (must already exist) */ | |
342 | ||
343 | arg = op->common.value.arg; | |
344 | if (!region_node) { | |
4be44fcd LB |
345 | status = |
346 | acpi_ns_lookup(walk_state->scope_info, | |
347 | arg->common.value.name, ACPI_TYPE_REGION, | |
348 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
349 | walk_state, ®ion_node); | |
350 | if (ACPI_FAILURE(status)) { | |
351 | ACPI_REPORT_NSERROR(arg->common.value.name, status); | |
352 | return_ACPI_STATUS(status); | |
1da177e4 LT |
353 | } |
354 | } | |
355 | ||
356 | /* Second arg is the field flags */ | |
357 | ||
358 | arg = arg->common.next; | |
359 | info.field_flags = (u8) arg->common.value.integer; | |
360 | info.attribute = 0; | |
361 | ||
362 | /* Each remaining arg is a Named Field */ | |
363 | ||
364 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
365 | info.region_node = region_node; | |
366 | ||
4be44fcd | 367 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 368 | |
4be44fcd | 369 | return_ACPI_STATUS(status); |
1da177e4 LT |
370 | } |
371 | ||
1da177e4 LT |
372 | /******************************************************************************* |
373 | * | |
374 | * FUNCTION: acpi_ds_init_field_objects | |
375 | * | |
376 | * PARAMETERS: Op - Op containing the Field definition and args | |
377 | * ` walk_state - Current method state | |
378 | * | |
379 | * RETURN: Status | |
380 | * | |
381 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
382 | * part of the field declaration, enter the name into the | |
383 | * namespace. | |
384 | * | |
385 | ******************************************************************************/ | |
386 | ||
387 | acpi_status | |
4be44fcd LB |
388 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
389 | struct acpi_walk_state *walk_state) | |
1da177e4 | 390 | { |
4be44fcd LB |
391 | acpi_status status; |
392 | union acpi_parse_object *arg = NULL; | |
393 | struct acpi_namespace_node *node; | |
394 | u8 type = 0; | |
1da177e4 | 395 | |
4be44fcd | 396 | ACPI_FUNCTION_TRACE_PTR("ds_init_field_objects", op); |
1da177e4 LT |
397 | |
398 | switch (walk_state->opcode) { | |
399 | case AML_FIELD_OP: | |
4be44fcd | 400 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
401 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
402 | break; | |
403 | ||
404 | case AML_BANK_FIELD_OP: | |
4be44fcd | 405 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
406 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
407 | break; | |
408 | ||
409 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 410 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
411 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
412 | break; | |
413 | ||
414 | default: | |
4be44fcd | 415 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
416 | } |
417 | ||
418 | /* | |
419 | * Walk the list of entries in the field_list | |
420 | */ | |
421 | while (arg) { | |
422 | /* Ignore OFFSET and ACCESSAS terms here */ | |
423 | ||
424 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { | |
4be44fcd LB |
425 | status = acpi_ns_lookup(walk_state->scope_info, |
426 | (char *)&arg->named.name, | |
427 | type, ACPI_IMODE_LOAD_PASS1, | |
428 | ACPI_NS_NO_UPSEARCH | | |
429 | ACPI_NS_DONT_OPEN_SCOPE | | |
430 | ACPI_NS_ERROR_IF_FOUND, | |
431 | walk_state, &node); | |
432 | if (ACPI_FAILURE(status)) { | |
433 | ACPI_REPORT_NSERROR((char *)&arg->named.name, | |
434 | status); | |
1da177e4 | 435 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 436 | return_ACPI_STATUS(status); |
1da177e4 LT |
437 | } |
438 | ||
439 | /* Name already exists, just ignore this error */ | |
440 | ||
441 | status = AE_OK; | |
442 | } | |
443 | ||
444 | arg->common.node = node; | |
445 | } | |
446 | ||
447 | /* Move to next field in the list */ | |
448 | ||
449 | arg = arg->common.next; | |
450 | } | |
451 | ||
4be44fcd | 452 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
453 | } |
454 | ||
1da177e4 LT |
455 | /******************************************************************************* |
456 | * | |
457 | * FUNCTION: acpi_ds_create_bank_field | |
458 | * | |
459 | * PARAMETERS: Op - Op containing the Field definition and args | |
460 | * region_node - Object for the containing Operation Region | |
461 | * ` walk_state - Current method state | |
462 | * | |
463 | * RETURN: Status | |
464 | * | |
465 | * DESCRIPTION: Create a new bank field in the specified operation region | |
466 | * | |
467 | ******************************************************************************/ | |
468 | ||
469 | acpi_status | |
4be44fcd LB |
470 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
471 | struct acpi_namespace_node *region_node, | |
472 | struct acpi_walk_state *walk_state) | |
1da177e4 | 473 | { |
4be44fcd LB |
474 | acpi_status status; |
475 | union acpi_parse_object *arg; | |
476 | struct acpi_create_field_info info; | |
1da177e4 | 477 | |
4be44fcd | 478 | ACPI_FUNCTION_TRACE_PTR("ds_create_bank_field", op); |
1da177e4 LT |
479 | |
480 | /* First arg is the name of the parent op_region (must already exist) */ | |
481 | ||
482 | arg = op->common.value.arg; | |
483 | if (!region_node) { | |
4be44fcd LB |
484 | status = |
485 | acpi_ns_lookup(walk_state->scope_info, | |
486 | arg->common.value.name, ACPI_TYPE_REGION, | |
487 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
488 | walk_state, ®ion_node); | |
489 | if (ACPI_FAILURE(status)) { | |
490 | ACPI_REPORT_NSERROR(arg->common.value.name, status); | |
491 | return_ACPI_STATUS(status); | |
1da177e4 LT |
492 | } |
493 | } | |
494 | ||
495 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
496 | ||
497 | arg = arg->common.next; | |
4be44fcd LB |
498 | status = |
499 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
500 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
501 | ACPI_NS_SEARCH_PARENT, walk_state, | |
502 | &info.register_node); | |
503 | if (ACPI_FAILURE(status)) { | |
504 | ACPI_REPORT_NSERROR(arg->common.value.string, status); | |
505 | return_ACPI_STATUS(status); | |
1da177e4 LT |
506 | } |
507 | ||
508 | /* Third arg is the bank_value */ | |
509 | ||
510 | arg = arg->common.next; | |
511 | info.bank_value = (u32) arg->common.value.integer; | |
512 | ||
513 | /* Fourth arg is the field flags */ | |
514 | ||
515 | arg = arg->common.next; | |
516 | info.field_flags = (u8) arg->common.value.integer; | |
517 | ||
518 | /* Each remaining arg is a Named Field */ | |
519 | ||
520 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
521 | info.region_node = region_node; | |
522 | ||
4be44fcd | 523 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 524 | |
4be44fcd | 525 | return_ACPI_STATUS(status); |
1da177e4 LT |
526 | } |
527 | ||
1da177e4 LT |
528 | /******************************************************************************* |
529 | * | |
530 | * FUNCTION: acpi_ds_create_index_field | |
531 | * | |
532 | * PARAMETERS: Op - Op containing the Field definition and args | |
533 | * region_node - Object for the containing Operation Region | |
534 | * ` walk_state - Current method state | |
535 | * | |
536 | * RETURN: Status | |
537 | * | |
538 | * DESCRIPTION: Create a new index field in the specified operation region | |
539 | * | |
540 | ******************************************************************************/ | |
541 | ||
542 | acpi_status | |
4be44fcd LB |
543 | acpi_ds_create_index_field(union acpi_parse_object *op, |
544 | struct acpi_namespace_node *region_node, | |
545 | struct acpi_walk_state *walk_state) | |
1da177e4 | 546 | { |
4be44fcd LB |
547 | acpi_status status; |
548 | union acpi_parse_object *arg; | |
549 | struct acpi_create_field_info info; | |
1da177e4 | 550 | |
4be44fcd | 551 | ACPI_FUNCTION_TRACE_PTR("ds_create_index_field", op); |
1da177e4 LT |
552 | |
553 | /* First arg is the name of the Index register (must already exist) */ | |
554 | ||
555 | arg = op->common.value.arg; | |
4be44fcd LB |
556 | status = |
557 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
558 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
559 | ACPI_NS_SEARCH_PARENT, walk_state, | |
560 | &info.register_node); | |
561 | if (ACPI_FAILURE(status)) { | |
562 | ACPI_REPORT_NSERROR(arg->common.value.string, status); | |
563 | return_ACPI_STATUS(status); | |
1da177e4 LT |
564 | } |
565 | ||
566 | /* Second arg is the data register (must already exist) */ | |
567 | ||
568 | arg = arg->common.next; | |
4be44fcd LB |
569 | status = |
570 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
571 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
572 | ACPI_NS_SEARCH_PARENT, walk_state, | |
573 | &info.data_register_node); | |
574 | if (ACPI_FAILURE(status)) { | |
575 | ACPI_REPORT_NSERROR(arg->common.value.string, status); | |
576 | return_ACPI_STATUS(status); | |
1da177e4 LT |
577 | } |
578 | ||
579 | /* Next arg is the field flags */ | |
580 | ||
581 | arg = arg->common.next; | |
582 | info.field_flags = (u8) arg->common.value.integer; | |
583 | ||
584 | /* Each remaining arg is a Named Field */ | |
585 | ||
586 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
587 | info.region_node = region_node; | |
588 | ||
4be44fcd | 589 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 590 | |
4be44fcd | 591 | return_ACPI_STATUS(status); |
1da177e4 | 592 | } |