Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsfield - Dispatcher field routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
6c9deb72 | 8 | * Copyright (C) 2000 - 2007, 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 | |
b229cf92 | 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)) { | |
b8e4d893 | 131 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 132 | return_ACPI_STATUS(status); |
1da177e4 LT |
133 | } |
134 | } | |
135 | ||
9c52657a BM |
136 | /* |
137 | * We could put the returned object (Node) on the object stack for later, | |
44f6c012 RM |
138 | * but for now, we will put it in the "op" object that the parser uses, |
139 | * so we can get it again at the end of this scope | |
1da177e4 LT |
140 | */ |
141 | op->common.node = node; | |
142 | ||
143 | /* | |
44f6c012 RM |
144 | * If there is no object attached to the node, this node was just created |
145 | * and we need to create the field object. Otherwise, this was a lookup | |
146 | * of an existing node and we don't want to create the field object again. | |
1da177e4 | 147 | */ |
4be44fcd | 148 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 149 | if (obj_desc) { |
4be44fcd | 150 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
151 | } |
152 | ||
153 | /* | |
154 | * The Field definition is not fully parsed at this time. | |
155 | * (We must save the address of the AML for the buffer and index operands) | |
156 | */ | |
157 | ||
158 | /* Create the buffer field object */ | |
159 | ||
4be44fcd | 160 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); |
1da177e4 LT |
161 | if (!obj_desc) { |
162 | status = AE_NO_MEMORY; | |
163 | goto cleanup; | |
164 | } | |
165 | ||
166 | /* | |
167 | * Remember location in AML stream of the field unit | |
168 | * opcode and operands -- since the buffer and index | |
169 | * operands must be evaluated. | |
170 | */ | |
4be44fcd | 171 | second_desc = obj_desc->common.next_object; |
1da177e4 LT |
172 | second_desc->extra.aml_start = op->named.data; |
173 | second_desc->extra.aml_length = op->named.length; | |
174 | obj_desc->buffer_field.node = node; | |
175 | ||
176 | /* Attach constructed field descriptors to parent node */ | |
177 | ||
4be44fcd LB |
178 | status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); |
179 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
180 | goto cleanup; |
181 | } | |
182 | ||
4be44fcd | 183 | cleanup: |
1da177e4 LT |
184 | |
185 | /* Remove local reference to the object */ | |
186 | ||
4be44fcd LB |
187 | acpi_ut_remove_reference(obj_desc); |
188 | return_ACPI_STATUS(status); | |
1da177e4 LT |
189 | } |
190 | ||
1da177e4 LT |
191 | /******************************************************************************* |
192 | * | |
193 | * FUNCTION: acpi_ds_get_field_names | |
194 | * | |
195 | * PARAMETERS: Info - create_field info structure | |
196 | * ` walk_state - Current method state | |
197 | * Arg - First parser arg for the field name list | |
198 | * | |
199 | * RETURN: Status | |
200 | * | |
201 | * DESCRIPTION: Process all named fields in a field declaration. Names are | |
202 | * entered into the namespace. | |
203 | * | |
204 | ******************************************************************************/ | |
205 | ||
44f6c012 | 206 | static acpi_status |
4be44fcd LB |
207 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
208 | struct acpi_walk_state *walk_state, | |
209 | union acpi_parse_object *arg) | |
1da177e4 | 210 | { |
4be44fcd LB |
211 | acpi_status status; |
212 | acpi_integer position; | |
1da177e4 | 213 | |
b229cf92 | 214 | ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); |
1da177e4 LT |
215 | |
216 | /* First field starts at bit zero */ | |
217 | ||
218 | info->field_bit_position = 0; | |
219 | ||
220 | /* Process all elements in the field list (of parse nodes) */ | |
221 | ||
222 | while (arg) { | |
223 | /* | |
224 | * Three types of field elements are handled: | |
225 | * 1) Offset - specifies a bit offset | |
226 | * 2) access_as - changes the access mode | |
227 | * 3) Name - Enters a new named field into the namespace | |
228 | */ | |
229 | switch (arg->common.aml_opcode) { | |
230 | case AML_INT_RESERVEDFIELD_OP: | |
231 | ||
232 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 233 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
234 | |
235 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
236 | ACPI_ERROR((AE_INFO, |
237 | "Bit offset within field too large (> 0xFFFFFFFF)")); | |
4be44fcd | 238 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
239 | } |
240 | ||
241 | info->field_bit_position = (u32) position; | |
242 | break; | |
243 | ||
1da177e4 LT |
244 | case AML_INT_ACCESSFIELD_OP: |
245 | ||
246 | /* | |
247 | * Get a new access_type and access_attribute -- to be used for all | |
44f6c012 RM |
248 | * field units that follow, until field end or another access_as |
249 | * keyword. | |
1da177e4 | 250 | * |
44f6c012 RM |
251 | * In field_flags, preserve the flag bits other than the |
252 | * ACCESS_TYPE bits | |
1da177e4 | 253 | */ |
44f6c012 | 254 | info->field_flags = (u8) |
4be44fcd LB |
255 | ((info-> |
256 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | | |
257 | ((u8) ((u32) arg->common.value.integer >> 8))); | |
1da177e4 LT |
258 | |
259 | info->attribute = (u8) (arg->common.value.integer); | |
260 | break; | |
261 | ||
1da177e4 LT |
262 | case AML_INT_NAMEDFIELD_OP: |
263 | ||
264 | /* Lookup the name */ | |
265 | ||
4be44fcd LB |
266 | status = acpi_ns_lookup(walk_state->scope_info, |
267 | (char *)&arg->named.name, | |
268 | info->field_type, | |
269 | ACPI_IMODE_EXECUTE, | |
270 | ACPI_NS_DONT_OPEN_SCOPE, | |
271 | walk_state, &info->field_node); | |
272 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
273 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
274 | status); | |
1da177e4 | 275 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 276 | return_ACPI_STATUS(status); |
1da177e4 LT |
277 | } |
278 | ||
279 | /* Already exists, ignore error */ | |
4be44fcd | 280 | } else { |
1da177e4 LT |
281 | arg->common.node = info->field_node; |
282 | info->field_bit_length = arg->common.value.size; | |
283 | ||
ef805d95 LM |
284 | /* |
285 | * If there is no object attached to the node, this node was just created | |
286 | * and we need to create the field object. Otherwise, this was a lookup | |
287 | * of an existing node and we don't want to create the field object again. | |
288 | */ | |
289 | if (!acpi_ns_get_attached_object | |
290 | (info->field_node)) { | |
291 | status = acpi_ex_prep_field_value(info); | |
292 | if (ACPI_FAILURE(status)) { | |
293 | return_ACPI_STATUS(status); | |
294 | } | |
1da177e4 LT |
295 | } |
296 | } | |
297 | ||
298 | /* Keep track of bit position for the next field */ | |
299 | ||
300 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 301 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
302 | |
303 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
304 | ACPI_ERROR((AE_INFO, |
305 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", | |
306 | ACPI_CAST_PTR(char, | |
307 | &info->field_node-> | |
308 | name))); | |
4be44fcd | 309 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
310 | } |
311 | ||
312 | info->field_bit_position += info->field_bit_length; | |
313 | break; | |
314 | ||
1da177e4 LT |
315 | default: |
316 | ||
b8e4d893 BM |
317 | ACPI_ERROR((AE_INFO, |
318 | "Invalid opcode in field list: %X", | |
319 | arg->common.aml_opcode)); | |
4be44fcd | 320 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
321 | } |
322 | ||
323 | arg = arg->common.next; | |
324 | } | |
325 | ||
4be44fcd | 326 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
327 | } |
328 | ||
1da177e4 LT |
329 | /******************************************************************************* |
330 | * | |
331 | * FUNCTION: acpi_ds_create_field | |
332 | * | |
333 | * PARAMETERS: Op - Op containing the Field definition and args | |
334 | * region_node - Object for the containing Operation Region | |
335 | * ` walk_state - Current method state | |
336 | * | |
337 | * RETURN: Status | |
338 | * | |
339 | * DESCRIPTION: Create a new field in the specified operation region | |
340 | * | |
341 | ******************************************************************************/ | |
342 | ||
343 | acpi_status | |
4be44fcd LB |
344 | acpi_ds_create_field(union acpi_parse_object *op, |
345 | struct acpi_namespace_node *region_node, | |
346 | struct acpi_walk_state *walk_state) | |
1da177e4 | 347 | { |
4be44fcd LB |
348 | acpi_status status; |
349 | union acpi_parse_object *arg; | |
350 | struct acpi_create_field_info info; | |
1da177e4 | 351 | |
b229cf92 | 352 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
1da177e4 LT |
353 | |
354 | /* First arg is the name of the parent op_region (must already exist) */ | |
355 | ||
356 | arg = op->common.value.arg; | |
357 | if (!region_node) { | |
4be44fcd LB |
358 | status = |
359 | acpi_ns_lookup(walk_state->scope_info, | |
360 | arg->common.value.name, ACPI_TYPE_REGION, | |
361 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
362 | walk_state, ®ion_node); | |
363 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 364 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 365 | return_ACPI_STATUS(status); |
1da177e4 LT |
366 | } |
367 | } | |
368 | ||
369 | /* Second arg is the field flags */ | |
370 | ||
371 | arg = arg->common.next; | |
372 | info.field_flags = (u8) arg->common.value.integer; | |
373 | info.attribute = 0; | |
374 | ||
375 | /* Each remaining arg is a Named Field */ | |
376 | ||
377 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
378 | info.region_node = region_node; | |
379 | ||
4be44fcd | 380 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 381 | |
4be44fcd | 382 | return_ACPI_STATUS(status); |
1da177e4 LT |
383 | } |
384 | ||
1da177e4 LT |
385 | /******************************************************************************* |
386 | * | |
387 | * FUNCTION: acpi_ds_init_field_objects | |
388 | * | |
389 | * PARAMETERS: Op - Op containing the Field definition and args | |
390 | * ` walk_state - Current method state | |
391 | * | |
392 | * RETURN: Status | |
393 | * | |
394 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
395 | * part of the field declaration, enter the name into the | |
396 | * namespace. | |
397 | * | |
398 | ******************************************************************************/ | |
399 | ||
400 | acpi_status | |
4be44fcd LB |
401 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
402 | struct acpi_walk_state *walk_state) | |
1da177e4 | 403 | { |
4be44fcd LB |
404 | acpi_status status; |
405 | union acpi_parse_object *arg = NULL; | |
406 | struct acpi_namespace_node *node; | |
407 | u8 type = 0; | |
ef805d95 | 408 | u32 flags; |
1da177e4 | 409 | |
b229cf92 | 410 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
1da177e4 | 411 | |
ef805d95 LM |
412 | /* |
413 | * During the load phase, we want to enter the name of the field into | |
414 | * the namespace. During the execute phase (when we evaluate the bank_value | |
415 | * operand), we want to lookup the name. | |
416 | */ | |
417 | if (walk_state->deferred_node) { | |
418 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE; | |
419 | } else { | |
420 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | | |
421 | ACPI_NS_ERROR_IF_FOUND; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | switch (walk_state->opcode) { |
425 | case AML_FIELD_OP: | |
4be44fcd | 426 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
427 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
428 | break; | |
429 | ||
430 | case AML_BANK_FIELD_OP: | |
4be44fcd | 431 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
432 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
433 | break; | |
434 | ||
435 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 436 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
437 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
438 | break; | |
439 | ||
440 | default: | |
4be44fcd | 441 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
442 | } |
443 | ||
444 | /* | |
445 | * Walk the list of entries in the field_list | |
446 | */ | |
447 | while (arg) { | |
52fc0b02 | 448 | |
1da177e4 LT |
449 | /* Ignore OFFSET and ACCESSAS terms here */ |
450 | ||
451 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { | |
4be44fcd LB |
452 | status = acpi_ns_lookup(walk_state->scope_info, |
453 | (char *)&arg->named.name, | |
454 | type, ACPI_IMODE_LOAD_PASS1, | |
ef805d95 | 455 | flags, walk_state, &node); |
4be44fcd | 456 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
457 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
458 | status); | |
1da177e4 | 459 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 460 | return_ACPI_STATUS(status); |
1da177e4 LT |
461 | } |
462 | ||
463 | /* Name already exists, just ignore this error */ | |
464 | ||
465 | status = AE_OK; | |
466 | } | |
467 | ||
468 | arg->common.node = node; | |
469 | } | |
470 | ||
471 | /* Move to next field in the list */ | |
472 | ||
473 | arg = arg->common.next; | |
474 | } | |
475 | ||
4be44fcd | 476 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
477 | } |
478 | ||
1da177e4 LT |
479 | /******************************************************************************* |
480 | * | |
481 | * FUNCTION: acpi_ds_create_bank_field | |
482 | * | |
483 | * PARAMETERS: Op - Op containing the Field definition and args | |
484 | * region_node - Object for the containing Operation Region | |
ef805d95 | 485 | * walk_state - Current method state |
1da177e4 LT |
486 | * |
487 | * RETURN: Status | |
488 | * | |
489 | * DESCRIPTION: Create a new bank field in the specified operation region | |
490 | * | |
491 | ******************************************************************************/ | |
492 | ||
493 | acpi_status | |
4be44fcd LB |
494 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
495 | struct acpi_namespace_node *region_node, | |
496 | struct acpi_walk_state *walk_state) | |
1da177e4 | 497 | { |
4be44fcd LB |
498 | acpi_status status; |
499 | union acpi_parse_object *arg; | |
500 | struct acpi_create_field_info info; | |
1da177e4 | 501 | |
b229cf92 | 502 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
1da177e4 LT |
503 | |
504 | /* First arg is the name of the parent op_region (must already exist) */ | |
505 | ||
506 | arg = op->common.value.arg; | |
507 | if (!region_node) { | |
4be44fcd LB |
508 | status = |
509 | acpi_ns_lookup(walk_state->scope_info, | |
510 | arg->common.value.name, ACPI_TYPE_REGION, | |
511 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
512 | walk_state, ®ion_node); | |
513 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 514 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 515 | return_ACPI_STATUS(status); |
1da177e4 LT |
516 | } |
517 | } | |
518 | ||
519 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
520 | ||
521 | arg = arg->common.next; | |
4be44fcd LB |
522 | status = |
523 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
524 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
525 | ACPI_NS_SEARCH_PARENT, walk_state, | |
526 | &info.register_node); | |
527 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 528 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 529 | return_ACPI_STATUS(status); |
1da177e4 LT |
530 | } |
531 | ||
ef805d95 LM |
532 | /* |
533 | * Third arg is the bank_value | |
534 | * This arg is a term_arg, not a constant | |
535 | * It will be evaluated later, by acpi_ds_eval_bank_field_operands | |
536 | */ | |
1da177e4 | 537 | arg = arg->common.next; |
9c52657a | 538 | |
1da177e4 LT |
539 | /* Fourth arg is the field flags */ |
540 | ||
541 | arg = arg->common.next; | |
542 | info.field_flags = (u8) arg->common.value.integer; | |
543 | ||
544 | /* Each remaining arg is a Named Field */ | |
545 | ||
546 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
547 | info.region_node = region_node; | |
548 | ||
ef805d95 LM |
549 | /* |
550 | * Use Info.data_register_node to store bank_field Op | |
551 | * It's safe because data_register_node will never be used when create bank field | |
552 | * We store aml_start and aml_length in the bank_field Op for late evaluation | |
553 | * Used in acpi_ex_prep_field_value(Info) | |
554 | * | |
555 | * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? | |
556 | */ | |
557 | info.data_register_node = (struct acpi_namespace_node *)op; | |
1da177e4 | 558 | |
ef805d95 | 559 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 560 | return_ACPI_STATUS(status); |
1da177e4 LT |
561 | } |
562 | ||
1da177e4 LT |
563 | /******************************************************************************* |
564 | * | |
565 | * FUNCTION: acpi_ds_create_index_field | |
566 | * | |
567 | * PARAMETERS: Op - Op containing the Field definition and args | |
568 | * region_node - Object for the containing Operation Region | |
569 | * ` walk_state - Current method state | |
570 | * | |
571 | * RETURN: Status | |
572 | * | |
573 | * DESCRIPTION: Create a new index field in the specified operation region | |
574 | * | |
575 | ******************************************************************************/ | |
576 | ||
577 | acpi_status | |
4be44fcd LB |
578 | acpi_ds_create_index_field(union acpi_parse_object *op, |
579 | struct acpi_namespace_node *region_node, | |
580 | struct acpi_walk_state *walk_state) | |
1da177e4 | 581 | { |
4be44fcd LB |
582 | acpi_status status; |
583 | union acpi_parse_object *arg; | |
584 | struct acpi_create_field_info info; | |
1da177e4 | 585 | |
b229cf92 | 586 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
1da177e4 LT |
587 | |
588 | /* First arg is the name of the Index register (must already exist) */ | |
589 | ||
590 | arg = op->common.value.arg; | |
4be44fcd LB |
591 | status = |
592 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
593 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
594 | ACPI_NS_SEARCH_PARENT, walk_state, | |
595 | &info.register_node); | |
596 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 597 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 598 | return_ACPI_STATUS(status); |
1da177e4 LT |
599 | } |
600 | ||
601 | /* Second arg is the data register (must already exist) */ | |
602 | ||
603 | arg = arg->common.next; | |
4be44fcd LB |
604 | status = |
605 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
606 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
607 | ACPI_NS_SEARCH_PARENT, walk_state, | |
608 | &info.data_register_node); | |
609 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 610 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 611 | return_ACPI_STATUS(status); |
1da177e4 LT |
612 | } |
613 | ||
614 | /* Next arg is the field flags */ | |
615 | ||
616 | arg = arg->common.next; | |
617 | info.field_flags = (u8) arg->common.value.integer; | |
618 | ||
619 | /* Each remaining arg is a Named Field */ | |
620 | ||
621 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
622 | info.region_node = region_node; | |
623 | ||
4be44fcd | 624 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 625 | |
4be44fcd | 626 | return_ACPI_STATUS(status); |
1da177e4 | 627 | } |