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