Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsfield - Dispatcher field routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
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 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "amlcode.h" | |
47 | #include "acdispat.h" | |
48 | #include "acinterp.h" | |
49 | #include "acnamesp.h" | |
50 | #include "acparser.h" | |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_DISPATCHER |
4be44fcd | 53 | ACPI_MODULE_NAME("dsfield") |
1da177e4 | 54 | |
44f6c012 | 55 | /* Local prototypes */ |
44f6c012 | 56 | static acpi_status |
4be44fcd LB |
57 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
58 | struct acpi_walk_state *walk_state, | |
59 | union acpi_parse_object *arg); | |
1da177e4 LT |
60 | |
61 | /******************************************************************************* | |
62 | * | |
63 | * FUNCTION: acpi_ds_create_buffer_field | |
64 | * | |
44f6c012 | 65 | * PARAMETERS: Op - Current parse op (create_xXField) |
1da177e4 LT |
66 | * walk_state - Current state |
67 | * | |
68 | * RETURN: Status | |
69 | * | |
70 | * DESCRIPTION: Execute the create_field operators: | |
71 | * create_bit_field_op, | |
72 | * create_byte_field_op, | |
73 | * create_word_field_op, | |
74 | * create_dword_field_op, | |
75 | * create_qword_field_op, | |
44f6c012 | 76 | * create_field_op (all of which define a field in a buffer) |
1da177e4 LT |
77 | * |
78 | ******************************************************************************/ | |
79 | ||
80 | acpi_status | |
4be44fcd LB |
81 | acpi_ds_create_buffer_field(union acpi_parse_object *op, |
82 | struct acpi_walk_state *walk_state) | |
1da177e4 | 83 | { |
4be44fcd LB |
84 | union acpi_parse_object *arg; |
85 | struct acpi_namespace_node *node; | |
86 | acpi_status status; | |
87 | union acpi_operand_object *obj_desc; | |
88 | union acpi_operand_object *second_desc = NULL; | |
89 | u32 flags; | |
1da177e4 | 90 | |
b229cf92 | 91 | ACPI_FUNCTION_TRACE(ds_create_buffer_field); |
1da177e4 | 92 | |
cca97b81 BM |
93 | /* |
94 | * Get the name_string argument (name of the new buffer_field) | |
95 | */ | |
1da177e4 | 96 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { |
cca97b81 BM |
97 | |
98 | /* For create_field, name is the 4th argument */ | |
99 | ||
4be44fcd LB |
100 | arg = acpi_ps_get_arg(op, 3); |
101 | } else { | |
cca97b81 | 102 | /* For all other create_xXXField operators, name is the 3rd argument */ |
1da177e4 | 103 | |
4be44fcd | 104 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
105 | } |
106 | ||
107 | if (!arg) { | |
4be44fcd | 108 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
109 | } |
110 | ||
111 | if (walk_state->deferred_node) { | |
112 | node = walk_state->deferred_node; | |
113 | status = AE_OK; | |
4be44fcd | 114 | } else { |
cca97b81 BM |
115 | /* Execute flag should always be set when this function is entered */ |
116 | ||
117 | if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { | |
118 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
1da177e4 LT |
119 | } |
120 | ||
cca97b81 BM |
121 | /* Creating new namespace node, should not already exist */ |
122 | ||
123 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | | |
124 | ACPI_NS_ERROR_IF_FOUND; | |
125 | ||
126 | /* Mark node temporary if we are executing a method */ | |
127 | ||
128 | if (walk_state->method_node) { | |
129 | flags |= ACPI_NS_TEMPORARY; | |
130 | } | |
131 | ||
132 | /* Enter the name_string into the namespace */ | |
133 | ||
4be44fcd LB |
134 | status = |
135 | acpi_ns_lookup(walk_state->scope_info, | |
136 | arg->common.value.string, ACPI_TYPE_ANY, | |
137 | ACPI_IMODE_LOAD_PASS1, flags, walk_state, | |
cca97b81 | 138 | &node); |
4be44fcd | 139 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 140 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 141 | return_ACPI_STATUS(status); |
1da177e4 LT |
142 | } |
143 | } | |
144 | ||
9c52657a BM |
145 | /* |
146 | * We could put the returned object (Node) on the object stack for later, | |
44f6c012 | 147 | * but for now, we will put it in the "op" object that the parser uses, |
cca97b81 | 148 | * so we can get it again at the end of this scope. |
1da177e4 LT |
149 | */ |
150 | op->common.node = node; | |
151 | ||
152 | /* | |
44f6c012 | 153 | * If there is no object attached to the node, this node was just created |
cca97b81 | 154 | * and we need to create the field object. Otherwise, this was a lookup |
44f6c012 | 155 | * of an existing node and we don't want to create the field object again. |
1da177e4 | 156 | */ |
4be44fcd | 157 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 158 | if (obj_desc) { |
4be44fcd | 159 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
160 | } |
161 | ||
162 | /* | |
163 | * The Field definition is not fully parsed at this time. | |
164 | * (We must save the address of the AML for the buffer and index operands) | |
165 | */ | |
166 | ||
167 | /* Create the buffer field object */ | |
168 | ||
4be44fcd | 169 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); |
1da177e4 LT |
170 | if (!obj_desc) { |
171 | status = AE_NO_MEMORY; | |
172 | goto cleanup; | |
173 | } | |
174 | ||
175 | /* | |
cca97b81 BM |
176 | * Remember location in AML stream of the field unit opcode and operands -- |
177 | * since the buffer and index operands must be evaluated. | |
1da177e4 | 178 | */ |
4be44fcd | 179 | second_desc = obj_desc->common.next_object; |
1da177e4 LT |
180 | second_desc->extra.aml_start = op->named.data; |
181 | second_desc->extra.aml_length = op->named.length; | |
182 | obj_desc->buffer_field.node = node; | |
183 | ||
184 | /* Attach constructed field descriptors to parent node */ | |
185 | ||
4be44fcd LB |
186 | status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); |
187 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
188 | goto cleanup; |
189 | } | |
190 | ||
4be44fcd | 191 | cleanup: |
1da177e4 LT |
192 | |
193 | /* Remove local reference to the object */ | |
194 | ||
4be44fcd LB |
195 | acpi_ut_remove_reference(obj_desc); |
196 | return_ACPI_STATUS(status); | |
1da177e4 LT |
197 | } |
198 | ||
1da177e4 LT |
199 | /******************************************************************************* |
200 | * | |
201 | * FUNCTION: acpi_ds_get_field_names | |
202 | * | |
203 | * PARAMETERS: Info - create_field info structure | |
204 | * ` walk_state - Current method state | |
205 | * Arg - First parser arg for the field name list | |
206 | * | |
207 | * RETURN: Status | |
208 | * | |
209 | * DESCRIPTION: Process all named fields in a field declaration. Names are | |
210 | * entered into the namespace. | |
211 | * | |
212 | ******************************************************************************/ | |
213 | ||
44f6c012 | 214 | static acpi_status |
4be44fcd LB |
215 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
216 | struct acpi_walk_state *walk_state, | |
217 | union acpi_parse_object *arg) | |
1da177e4 | 218 | { |
4be44fcd LB |
219 | acpi_status status; |
220 | acpi_integer position; | |
1da177e4 | 221 | |
b229cf92 | 222 | ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); |
1da177e4 LT |
223 | |
224 | /* First field starts at bit zero */ | |
225 | ||
226 | info->field_bit_position = 0; | |
227 | ||
228 | /* Process all elements in the field list (of parse nodes) */ | |
229 | ||
230 | while (arg) { | |
231 | /* | |
232 | * Three types of field elements are handled: | |
233 | * 1) Offset - specifies a bit offset | |
234 | * 2) access_as - changes the access mode | |
235 | * 3) Name - Enters a new named field into the namespace | |
236 | */ | |
237 | switch (arg->common.aml_opcode) { | |
238 | case AML_INT_RESERVEDFIELD_OP: | |
239 | ||
240 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 241 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
242 | |
243 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
244 | ACPI_ERROR((AE_INFO, |
245 | "Bit offset within field too large (> 0xFFFFFFFF)")); | |
4be44fcd | 246 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
247 | } |
248 | ||
249 | info->field_bit_position = (u32) position; | |
250 | break; | |
251 | ||
1da177e4 LT |
252 | case AML_INT_ACCESSFIELD_OP: |
253 | ||
254 | /* | |
255 | * Get a new access_type and access_attribute -- to be used for all | |
44f6c012 RM |
256 | * field units that follow, until field end or another access_as |
257 | * keyword. | |
1da177e4 | 258 | * |
44f6c012 RM |
259 | * In field_flags, preserve the flag bits other than the |
260 | * ACCESS_TYPE bits | |
1da177e4 | 261 | */ |
44f6c012 | 262 | info->field_flags = (u8) |
4be44fcd LB |
263 | ((info-> |
264 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | | |
265 | ((u8) ((u32) arg->common.value.integer >> 8))); | |
1da177e4 LT |
266 | |
267 | info->attribute = (u8) (arg->common.value.integer); | |
268 | break; | |
269 | ||
1da177e4 LT |
270 | case AML_INT_NAMEDFIELD_OP: |
271 | ||
cca97b81 | 272 | /* Lookup the name, it should already exist */ |
1da177e4 | 273 | |
4be44fcd LB |
274 | status = acpi_ns_lookup(walk_state->scope_info, |
275 | (char *)&arg->named.name, | |
276 | info->field_type, | |
277 | ACPI_IMODE_EXECUTE, | |
278 | ACPI_NS_DONT_OPEN_SCOPE, | |
279 | walk_state, &info->field_node); | |
280 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
281 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
282 | status); | |
cca97b81 | 283 | return_ACPI_STATUS(status); |
4be44fcd | 284 | } else { |
1da177e4 LT |
285 | arg->common.node = info->field_node; |
286 | info->field_bit_length = arg->common.value.size; | |
287 | ||
ef805d95 | 288 | /* |
cca97b81 BM |
289 | * If there is no object attached to the node, this node was |
290 | * just created and we need to create the field object. | |
291 | * Otherwise, this was a lookup of an existing node and we | |
292 | * don't want to create the field object again. | |
ef805d95 LM |
293 | */ |
294 | if (!acpi_ns_get_attached_object | |
295 | (info->field_node)) { | |
296 | status = acpi_ex_prep_field_value(info); | |
297 | if (ACPI_FAILURE(status)) { | |
298 | return_ACPI_STATUS(status); | |
299 | } | |
1da177e4 LT |
300 | } |
301 | } | |
302 | ||
303 | /* Keep track of bit position for the next field */ | |
304 | ||
305 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 306 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
307 | |
308 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
309 | ACPI_ERROR((AE_INFO, |
310 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", | |
311 | ACPI_CAST_PTR(char, | |
312 | &info->field_node-> | |
313 | name))); | |
4be44fcd | 314 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
315 | } |
316 | ||
317 | info->field_bit_position += info->field_bit_length; | |
318 | break; | |
319 | ||
1da177e4 LT |
320 | default: |
321 | ||
b8e4d893 BM |
322 | ACPI_ERROR((AE_INFO, |
323 | "Invalid opcode in field list: %X", | |
324 | arg->common.aml_opcode)); | |
4be44fcd | 325 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
326 | } |
327 | ||
328 | arg = arg->common.next; | |
329 | } | |
330 | ||
4be44fcd | 331 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
332 | } |
333 | ||
1da177e4 LT |
334 | /******************************************************************************* |
335 | * | |
336 | * FUNCTION: acpi_ds_create_field | |
337 | * | |
338 | * PARAMETERS: Op - Op containing the Field definition and args | |
339 | * region_node - Object for the containing Operation Region | |
340 | * ` walk_state - Current method state | |
341 | * | |
342 | * RETURN: Status | |
343 | * | |
344 | * DESCRIPTION: Create a new field in the specified operation region | |
345 | * | |
346 | ******************************************************************************/ | |
347 | ||
348 | acpi_status | |
4be44fcd LB |
349 | acpi_ds_create_field(union acpi_parse_object *op, |
350 | struct acpi_namespace_node *region_node, | |
351 | struct acpi_walk_state *walk_state) | |
1da177e4 | 352 | { |
4be44fcd LB |
353 | acpi_status status; |
354 | union acpi_parse_object *arg; | |
355 | struct acpi_create_field_info info; | |
1da177e4 | 356 | |
b229cf92 | 357 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
1da177e4 LT |
358 | |
359 | /* First arg is the name of the parent op_region (must already exist) */ | |
360 | ||
361 | arg = op->common.value.arg; | |
362 | if (!region_node) { | |
4be44fcd LB |
363 | status = |
364 | acpi_ns_lookup(walk_state->scope_info, | |
365 | arg->common.value.name, ACPI_TYPE_REGION, | |
366 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
367 | walk_state, ®ion_node); | |
368 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 369 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 370 | return_ACPI_STATUS(status); |
1da177e4 LT |
371 | } |
372 | } | |
373 | ||
374 | /* Second arg is the field flags */ | |
375 | ||
376 | arg = arg->common.next; | |
377 | info.field_flags = (u8) arg->common.value.integer; | |
378 | info.attribute = 0; | |
379 | ||
380 | /* Each remaining arg is a Named Field */ | |
381 | ||
382 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
383 | info.region_node = region_node; | |
384 | ||
4be44fcd | 385 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 386 | |
4be44fcd | 387 | return_ACPI_STATUS(status); |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 LT |
390 | /******************************************************************************* |
391 | * | |
392 | * FUNCTION: acpi_ds_init_field_objects | |
393 | * | |
394 | * PARAMETERS: Op - Op containing the Field definition and args | |
395 | * ` walk_state - Current method state | |
396 | * | |
397 | * RETURN: Status | |
398 | * | |
399 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
400 | * part of the field declaration, enter the name into the | |
401 | * namespace. | |
402 | * | |
403 | ******************************************************************************/ | |
404 | ||
405 | acpi_status | |
4be44fcd LB |
406 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
407 | struct acpi_walk_state *walk_state) | |
1da177e4 | 408 | { |
4be44fcd LB |
409 | acpi_status status; |
410 | union acpi_parse_object *arg = NULL; | |
411 | struct acpi_namespace_node *node; | |
412 | u8 type = 0; | |
ef805d95 | 413 | u32 flags; |
1da177e4 | 414 | |
b229cf92 | 415 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
1da177e4 | 416 | |
cca97b81 BM |
417 | /* Execute flag should always be set when this function is entered */ |
418 | ||
419 | if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { | |
420 | if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) { | |
421 | ||
422 | /* bank_field Op is deferred, just return OK */ | |
423 | ||
424 | return_ACPI_STATUS(AE_OK); | |
425 | } | |
426 | ||
427 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
ef805d95 LM |
428 | } |
429 | ||
cca97b81 BM |
430 | /* |
431 | * Get the field_list argument for this opcode. This is the start of the | |
432 | * list of field elements. | |
433 | */ | |
1da177e4 LT |
434 | switch (walk_state->opcode) { |
435 | case AML_FIELD_OP: | |
4be44fcd | 436 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
437 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
438 | break; | |
439 | ||
440 | case AML_BANK_FIELD_OP: | |
4be44fcd | 441 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
442 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
443 | break; | |
444 | ||
445 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 446 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
447 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
448 | break; | |
449 | ||
450 | default: | |
4be44fcd | 451 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
452 | } |
453 | ||
cca97b81 BM |
454 | /* Creating new namespace node(s), should not already exist */ |
455 | ||
456 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | | |
457 | ACPI_NS_ERROR_IF_FOUND; | |
458 | ||
459 | /* Mark node(s) temporary if we are executing a method */ | |
460 | ||
461 | if (walk_state->method_node) { | |
462 | flags |= ACPI_NS_TEMPORARY; | |
463 | } | |
464 | ||
1da177e4 LT |
465 | /* |
466 | * Walk the list of entries in the field_list | |
7aa7d433 | 467 | * Note: field_list can be of zero length. In this case, Arg will be NULL. |
1da177e4 LT |
468 | */ |
469 | while (arg) { | |
cca97b81 BM |
470 | /* |
471 | * Ignore OFFSET and ACCESSAS terms here; we are only interested in the | |
472 | * field names in order to enter them into the namespace. | |
473 | */ | |
1da177e4 | 474 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { |
4be44fcd | 475 | status = acpi_ns_lookup(walk_state->scope_info, |
cca97b81 BM |
476 | (char *)&arg->named.name, type, |
477 | ACPI_IMODE_LOAD_PASS1, flags, | |
478 | walk_state, &node); | |
4be44fcd | 479 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
480 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
481 | status); | |
1da177e4 | 482 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 483 | return_ACPI_STATUS(status); |
1da177e4 LT |
484 | } |
485 | ||
486 | /* Name already exists, just ignore this error */ | |
487 | ||
488 | status = AE_OK; | |
489 | } | |
490 | ||
491 | arg->common.node = node; | |
492 | } | |
493 | ||
cca97b81 | 494 | /* Get the next field element in the list */ |
1da177e4 LT |
495 | |
496 | arg = arg->common.next; | |
497 | } | |
498 | ||
4be44fcd | 499 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
500 | } |
501 | ||
1da177e4 LT |
502 | /******************************************************************************* |
503 | * | |
504 | * FUNCTION: acpi_ds_create_bank_field | |
505 | * | |
506 | * PARAMETERS: Op - Op containing the Field definition and args | |
507 | * region_node - Object for the containing Operation Region | |
ef805d95 | 508 | * walk_state - Current method state |
1da177e4 LT |
509 | * |
510 | * RETURN: Status | |
511 | * | |
512 | * DESCRIPTION: Create a new bank field in the specified operation region | |
513 | * | |
514 | ******************************************************************************/ | |
515 | ||
516 | acpi_status | |
4be44fcd LB |
517 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
518 | struct acpi_namespace_node *region_node, | |
519 | struct acpi_walk_state *walk_state) | |
1da177e4 | 520 | { |
4be44fcd LB |
521 | acpi_status status; |
522 | union acpi_parse_object *arg; | |
523 | struct acpi_create_field_info info; | |
1da177e4 | 524 | |
b229cf92 | 525 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
1da177e4 LT |
526 | |
527 | /* First arg is the name of the parent op_region (must already exist) */ | |
528 | ||
529 | arg = op->common.value.arg; | |
530 | if (!region_node) { | |
4be44fcd LB |
531 | status = |
532 | acpi_ns_lookup(walk_state->scope_info, | |
533 | arg->common.value.name, ACPI_TYPE_REGION, | |
534 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
535 | walk_state, ®ion_node); | |
536 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 537 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 538 | return_ACPI_STATUS(status); |
1da177e4 LT |
539 | } |
540 | } | |
541 | ||
542 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
543 | ||
544 | arg = arg->common.next; | |
4be44fcd LB |
545 | status = |
546 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
547 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
548 | ACPI_NS_SEARCH_PARENT, walk_state, | |
549 | &info.register_node); | |
550 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 551 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 552 | return_ACPI_STATUS(status); |
1da177e4 LT |
553 | } |
554 | ||
ef805d95 LM |
555 | /* |
556 | * Third arg is the bank_value | |
557 | * This arg is a term_arg, not a constant | |
558 | * It will be evaluated later, by acpi_ds_eval_bank_field_operands | |
559 | */ | |
1da177e4 | 560 | arg = arg->common.next; |
9c52657a | 561 | |
1da177e4 LT |
562 | /* Fourth arg is the field flags */ |
563 | ||
564 | arg = arg->common.next; | |
565 | info.field_flags = (u8) arg->common.value.integer; | |
566 | ||
567 | /* Each remaining arg is a Named Field */ | |
568 | ||
569 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
570 | info.region_node = region_node; | |
571 | ||
ef805d95 LM |
572 | /* |
573 | * Use Info.data_register_node to store bank_field Op | |
574 | * It's safe because data_register_node will never be used when create bank field | |
575 | * We store aml_start and aml_length in the bank_field Op for late evaluation | |
576 | * Used in acpi_ex_prep_field_value(Info) | |
577 | * | |
578 | * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? | |
579 | */ | |
580 | info.data_register_node = (struct acpi_namespace_node *)op; | |
1da177e4 | 581 | |
ef805d95 | 582 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 583 | return_ACPI_STATUS(status); |
1da177e4 LT |
584 | } |
585 | ||
1da177e4 LT |
586 | /******************************************************************************* |
587 | * | |
588 | * FUNCTION: acpi_ds_create_index_field | |
589 | * | |
590 | * PARAMETERS: Op - Op containing the Field definition and args | |
591 | * region_node - Object for the containing Operation Region | |
592 | * ` walk_state - Current method state | |
593 | * | |
594 | * RETURN: Status | |
595 | * | |
596 | * DESCRIPTION: Create a new index field in the specified operation region | |
597 | * | |
598 | ******************************************************************************/ | |
599 | ||
600 | acpi_status | |
4be44fcd LB |
601 | acpi_ds_create_index_field(union acpi_parse_object *op, |
602 | struct acpi_namespace_node *region_node, | |
603 | struct acpi_walk_state *walk_state) | |
1da177e4 | 604 | { |
4be44fcd LB |
605 | acpi_status status; |
606 | union acpi_parse_object *arg; | |
607 | struct acpi_create_field_info info; | |
1da177e4 | 608 | |
b229cf92 | 609 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
1da177e4 LT |
610 | |
611 | /* First arg is the name of the Index register (must already exist) */ | |
612 | ||
613 | arg = op->common.value.arg; | |
4be44fcd LB |
614 | status = |
615 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
616 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
617 | ACPI_NS_SEARCH_PARENT, walk_state, | |
618 | &info.register_node); | |
619 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 620 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 621 | return_ACPI_STATUS(status); |
1da177e4 LT |
622 | } |
623 | ||
624 | /* Second arg is the data register (must already exist) */ | |
625 | ||
626 | arg = arg->common.next; | |
4be44fcd LB |
627 | status = |
628 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
629 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
630 | ACPI_NS_SEARCH_PARENT, walk_state, | |
631 | &info.data_register_node); | |
632 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 633 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 634 | return_ACPI_STATUS(status); |
1da177e4 LT |
635 | } |
636 | ||
637 | /* Next arg is the field flags */ | |
638 | ||
639 | arg = arg->common.next; | |
640 | info.field_flags = (u8) arg->common.value.integer; | |
641 | ||
642 | /* Each remaining arg is a Named Field */ | |
643 | ||
644 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
645 | info.region_node = region_node; | |
646 | ||
4be44fcd | 647 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 648 | |
4be44fcd | 649 | return_ACPI_STATUS(status); |
1da177e4 | 650 | } |