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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 | ||
284 | /* Create and initialize an object for the new Field Node */ | |
285 | ||
4be44fcd LB |
286 | status = acpi_ex_prep_field_value(info); |
287 | if (ACPI_FAILURE(status)) { | |
288 | return_ACPI_STATUS(status); | |
1da177e4 LT |
289 | } |
290 | } | |
291 | ||
292 | /* Keep track of bit position for the next field */ | |
293 | ||
294 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 295 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
296 | |
297 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
298 | ACPI_ERROR((AE_INFO, |
299 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", | |
300 | ACPI_CAST_PTR(char, | |
301 | &info->field_node-> | |
302 | name))); | |
4be44fcd | 303 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
304 | } |
305 | ||
306 | info->field_bit_position += info->field_bit_length; | |
307 | break; | |
308 | ||
1da177e4 LT |
309 | default: |
310 | ||
b8e4d893 BM |
311 | ACPI_ERROR((AE_INFO, |
312 | "Invalid opcode in field list: %X", | |
313 | arg->common.aml_opcode)); | |
4be44fcd | 314 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
315 | } |
316 | ||
317 | arg = arg->common.next; | |
318 | } | |
319 | ||
4be44fcd | 320 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
321 | } |
322 | ||
1da177e4 LT |
323 | /******************************************************************************* |
324 | * | |
325 | * FUNCTION: acpi_ds_create_field | |
326 | * | |
327 | * PARAMETERS: Op - Op containing the Field definition and args | |
328 | * region_node - Object for the containing Operation Region | |
329 | * ` walk_state - Current method state | |
330 | * | |
331 | * RETURN: Status | |
332 | * | |
333 | * DESCRIPTION: Create a new field in the specified operation region | |
334 | * | |
335 | ******************************************************************************/ | |
336 | ||
337 | acpi_status | |
4be44fcd LB |
338 | acpi_ds_create_field(union acpi_parse_object *op, |
339 | struct acpi_namespace_node *region_node, | |
340 | struct acpi_walk_state *walk_state) | |
1da177e4 | 341 | { |
4be44fcd LB |
342 | acpi_status status; |
343 | union acpi_parse_object *arg; | |
344 | struct acpi_create_field_info info; | |
1da177e4 | 345 | |
b229cf92 | 346 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
1da177e4 LT |
347 | |
348 | /* First arg is the name of the parent op_region (must already exist) */ | |
349 | ||
350 | arg = op->common.value.arg; | |
351 | if (!region_node) { | |
4be44fcd LB |
352 | status = |
353 | acpi_ns_lookup(walk_state->scope_info, | |
354 | arg->common.value.name, ACPI_TYPE_REGION, | |
355 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
356 | walk_state, ®ion_node); | |
357 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 358 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 359 | return_ACPI_STATUS(status); |
1da177e4 LT |
360 | } |
361 | } | |
362 | ||
363 | /* Second arg is the field flags */ | |
364 | ||
365 | arg = arg->common.next; | |
366 | info.field_flags = (u8) arg->common.value.integer; | |
367 | info.attribute = 0; | |
368 | ||
369 | /* Each remaining arg is a Named Field */ | |
370 | ||
371 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
372 | info.region_node = region_node; | |
373 | ||
4be44fcd | 374 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 375 | |
4be44fcd | 376 | return_ACPI_STATUS(status); |
1da177e4 LT |
377 | } |
378 | ||
1da177e4 LT |
379 | /******************************************************************************* |
380 | * | |
381 | * FUNCTION: acpi_ds_init_field_objects | |
382 | * | |
383 | * PARAMETERS: Op - Op containing the Field definition and args | |
384 | * ` walk_state - Current method state | |
385 | * | |
386 | * RETURN: Status | |
387 | * | |
388 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
389 | * part of the field declaration, enter the name into the | |
390 | * namespace. | |
391 | * | |
392 | ******************************************************************************/ | |
393 | ||
394 | acpi_status | |
4be44fcd LB |
395 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
396 | struct acpi_walk_state *walk_state) | |
1da177e4 | 397 | { |
4be44fcd LB |
398 | acpi_status status; |
399 | union acpi_parse_object *arg = NULL; | |
400 | struct acpi_namespace_node *node; | |
401 | u8 type = 0; | |
1da177e4 | 402 | |
b229cf92 | 403 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
1da177e4 LT |
404 | |
405 | switch (walk_state->opcode) { | |
406 | case AML_FIELD_OP: | |
4be44fcd | 407 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
408 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
409 | break; | |
410 | ||
411 | case AML_BANK_FIELD_OP: | |
4be44fcd | 412 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
413 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
414 | break; | |
415 | ||
416 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 417 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
418 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
419 | break; | |
420 | ||
421 | default: | |
4be44fcd | 422 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
423 | } |
424 | ||
425 | /* | |
426 | * Walk the list of entries in the field_list | |
427 | */ | |
428 | while (arg) { | |
52fc0b02 | 429 | |
1da177e4 LT |
430 | /* Ignore OFFSET and ACCESSAS terms here */ |
431 | ||
432 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { | |
4be44fcd LB |
433 | status = acpi_ns_lookup(walk_state->scope_info, |
434 | (char *)&arg->named.name, | |
435 | type, ACPI_IMODE_LOAD_PASS1, | |
436 | ACPI_NS_NO_UPSEARCH | | |
437 | ACPI_NS_DONT_OPEN_SCOPE | | |
438 | ACPI_NS_ERROR_IF_FOUND, | |
439 | walk_state, &node); | |
440 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
441 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
442 | status); | |
1da177e4 | 443 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 444 | return_ACPI_STATUS(status); |
1da177e4 LT |
445 | } |
446 | ||
447 | /* Name already exists, just ignore this error */ | |
448 | ||
449 | status = AE_OK; | |
450 | } | |
451 | ||
452 | arg->common.node = node; | |
453 | } | |
454 | ||
455 | /* Move to next field in the list */ | |
456 | ||
457 | arg = arg->common.next; | |
458 | } | |
459 | ||
4be44fcd | 460 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
461 | } |
462 | ||
1da177e4 LT |
463 | /******************************************************************************* |
464 | * | |
465 | * FUNCTION: acpi_ds_create_bank_field | |
466 | * | |
467 | * PARAMETERS: Op - Op containing the Field definition and args | |
468 | * region_node - Object for the containing Operation Region | |
469 | * ` walk_state - Current method state | |
470 | * | |
471 | * RETURN: Status | |
472 | * | |
473 | * DESCRIPTION: Create a new bank field in the specified operation region | |
474 | * | |
475 | ******************************************************************************/ | |
476 | ||
477 | acpi_status | |
4be44fcd LB |
478 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
479 | struct acpi_namespace_node *region_node, | |
480 | struct acpi_walk_state *walk_state) | |
1da177e4 | 481 | { |
4be44fcd LB |
482 | acpi_status status; |
483 | union acpi_parse_object *arg; | |
484 | struct acpi_create_field_info info; | |
1da177e4 | 485 | |
b229cf92 | 486 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
1da177e4 LT |
487 | |
488 | /* First arg is the name of the parent op_region (must already exist) */ | |
489 | ||
490 | arg = op->common.value.arg; | |
491 | if (!region_node) { | |
4be44fcd LB |
492 | status = |
493 | acpi_ns_lookup(walk_state->scope_info, | |
494 | arg->common.value.name, ACPI_TYPE_REGION, | |
495 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
496 | walk_state, ®ion_node); | |
497 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 498 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 499 | return_ACPI_STATUS(status); |
1da177e4 LT |
500 | } |
501 | } | |
502 | ||
503 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
504 | ||
505 | arg = arg->common.next; | |
4be44fcd LB |
506 | status = |
507 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
508 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
509 | ACPI_NS_SEARCH_PARENT, walk_state, | |
510 | &info.register_node); | |
511 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 512 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 513 | return_ACPI_STATUS(status); |
1da177e4 LT |
514 | } |
515 | ||
516 | /* Third arg is the bank_value */ | |
517 | ||
9c52657a BM |
518 | /* TBD: This arg is a term_arg, not a constant, and must be evaluated */ |
519 | ||
1da177e4 | 520 | arg = arg->common.next; |
9c52657a BM |
521 | |
522 | /* Currently, only the following constants are supported */ | |
523 | ||
524 | switch (arg->common.aml_opcode) { | |
525 | case AML_ZERO_OP: | |
526 | info.bank_value = 0; | |
527 | break; | |
528 | ||
529 | case AML_ONE_OP: | |
530 | info.bank_value = 1; | |
531 | break; | |
532 | ||
533 | case AML_BYTE_OP: | |
534 | case AML_WORD_OP: | |
535 | case AML_DWORD_OP: | |
536 | case AML_QWORD_OP: | |
537 | info.bank_value = (u32) arg->common.value.integer; | |
538 | break; | |
539 | ||
540 | default: | |
541 | info.bank_value = 0; | |
542 | ACPI_ERROR((AE_INFO, | |
543 | "Non-constant BankValue for BankField is not implemented")); | |
544 | } | |
1da177e4 LT |
545 | |
546 | /* Fourth arg is the field flags */ | |
547 | ||
548 | arg = arg->common.next; | |
549 | info.field_flags = (u8) arg->common.value.integer; | |
550 | ||
551 | /* Each remaining arg is a Named Field */ | |
552 | ||
553 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
554 | info.region_node = region_node; | |
555 | ||
4be44fcd | 556 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 557 | |
4be44fcd | 558 | return_ACPI_STATUS(status); |
1da177e4 LT |
559 | } |
560 | ||
1da177e4 LT |
561 | /******************************************************************************* |
562 | * | |
563 | * FUNCTION: acpi_ds_create_index_field | |
564 | * | |
565 | * PARAMETERS: Op - Op containing the Field definition and args | |
566 | * region_node - Object for the containing Operation Region | |
567 | * ` walk_state - Current method state | |
568 | * | |
569 | * RETURN: Status | |
570 | * | |
571 | * DESCRIPTION: Create a new index field in the specified operation region | |
572 | * | |
573 | ******************************************************************************/ | |
574 | ||
575 | acpi_status | |
4be44fcd LB |
576 | acpi_ds_create_index_field(union acpi_parse_object *op, |
577 | struct acpi_namespace_node *region_node, | |
578 | struct acpi_walk_state *walk_state) | |
1da177e4 | 579 | { |
4be44fcd LB |
580 | acpi_status status; |
581 | union acpi_parse_object *arg; | |
582 | struct acpi_create_field_info info; | |
1da177e4 | 583 | |
b229cf92 | 584 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
1da177e4 LT |
585 | |
586 | /* First arg is the name of the Index register (must already exist) */ | |
587 | ||
588 | arg = op->common.value.arg; | |
4be44fcd LB |
589 | status = |
590 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
591 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
592 | ACPI_NS_SEARCH_PARENT, walk_state, | |
593 | &info.register_node); | |
594 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 595 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 596 | return_ACPI_STATUS(status); |
1da177e4 LT |
597 | } |
598 | ||
599 | /* Second arg is the data register (must already exist) */ | |
600 | ||
601 | arg = arg->common.next; | |
4be44fcd LB |
602 | status = |
603 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
604 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
605 | ACPI_NS_SEARCH_PARENT, walk_state, | |
606 | &info.data_register_node); | |
607 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 608 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 609 | return_ACPI_STATUS(status); |
1da177e4 LT |
610 | } |
611 | ||
612 | /* Next arg is the field flags */ | |
613 | ||
614 | arg = arg->common.next; | |
615 | info.field_flags = (u8) arg->common.value.integer; | |
616 | ||
617 | /* Each remaining arg is a Named Field */ | |
618 | ||
619 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
620 | info.region_node = region_node; | |
621 | ||
4be44fcd | 622 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 623 | |
4be44fcd | 624 | return_ACPI_STATUS(status); |
1da177e4 | 625 | } |