Commit | Line | Data |
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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 | 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 | ||
7f0c826a LM |
126 | /* |
127 | * Mark node temporary if we are executing a normal control | |
128 | * method. (Don't mark if this is a module-level code method) | |
129 | */ | |
130 | if (walk_state->method_node && | |
131 | !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) { | |
cca97b81 BM |
132 | flags |= ACPI_NS_TEMPORARY; |
133 | } | |
134 | ||
135 | /* Enter the name_string into the namespace */ | |
136 | ||
4be44fcd LB |
137 | status = |
138 | acpi_ns_lookup(walk_state->scope_info, | |
139 | arg->common.value.string, ACPI_TYPE_ANY, | |
140 | ACPI_IMODE_LOAD_PASS1, flags, walk_state, | |
cca97b81 | 141 | &node); |
4be44fcd | 142 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 143 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 144 | return_ACPI_STATUS(status); |
1da177e4 LT |
145 | } |
146 | } | |
147 | ||
9c52657a BM |
148 | /* |
149 | * We could put the returned object (Node) on the object stack for later, | |
44f6c012 | 150 | * but for now, we will put it in the "op" object that the parser uses, |
cca97b81 | 151 | * so we can get it again at the end of this scope. |
1da177e4 LT |
152 | */ |
153 | op->common.node = node; | |
154 | ||
155 | /* | |
44f6c012 | 156 | * If there is no object attached to the node, this node was just created |
cca97b81 | 157 | * and we need to create the field object. Otherwise, this was a lookup |
44f6c012 | 158 | * of an existing node and we don't want to create the field object again. |
1da177e4 | 159 | */ |
4be44fcd | 160 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 161 | if (obj_desc) { |
4be44fcd | 162 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
163 | } |
164 | ||
165 | /* | |
166 | * The Field definition is not fully parsed at this time. | |
167 | * (We must save the address of the AML for the buffer and index operands) | |
168 | */ | |
169 | ||
170 | /* Create the buffer field object */ | |
171 | ||
4be44fcd | 172 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); |
1da177e4 LT |
173 | if (!obj_desc) { |
174 | status = AE_NO_MEMORY; | |
175 | goto cleanup; | |
176 | } | |
177 | ||
178 | /* | |
cca97b81 BM |
179 | * Remember location in AML stream of the field unit opcode and operands -- |
180 | * since the buffer and index operands must be evaluated. | |
1da177e4 | 181 | */ |
4be44fcd | 182 | second_desc = obj_desc->common.next_object; |
1da177e4 LT |
183 | second_desc->extra.aml_start = op->named.data; |
184 | second_desc->extra.aml_length = op->named.length; | |
185 | obj_desc->buffer_field.node = node; | |
186 | ||
187 | /* Attach constructed field descriptors to parent node */ | |
188 | ||
4be44fcd LB |
189 | status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); |
190 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
191 | goto cleanup; |
192 | } | |
193 | ||
4be44fcd | 194 | cleanup: |
1da177e4 LT |
195 | |
196 | /* Remove local reference to the object */ | |
197 | ||
4be44fcd LB |
198 | acpi_ut_remove_reference(obj_desc); |
199 | return_ACPI_STATUS(status); | |
1da177e4 LT |
200 | } |
201 | ||
1da177e4 LT |
202 | /******************************************************************************* |
203 | * | |
204 | * FUNCTION: acpi_ds_get_field_names | |
205 | * | |
206 | * PARAMETERS: Info - create_field info structure | |
207 | * ` walk_state - Current method state | |
208 | * Arg - First parser arg for the field name list | |
209 | * | |
210 | * RETURN: Status | |
211 | * | |
212 | * DESCRIPTION: Process all named fields in a field declaration. Names are | |
213 | * entered into the namespace. | |
214 | * | |
215 | ******************************************************************************/ | |
216 | ||
44f6c012 | 217 | static acpi_status |
4be44fcd LB |
218 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
219 | struct acpi_walk_state *walk_state, | |
220 | union acpi_parse_object *arg) | |
1da177e4 | 221 | { |
4be44fcd LB |
222 | acpi_status status; |
223 | acpi_integer position; | |
1da177e4 | 224 | |
b229cf92 | 225 | ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); |
1da177e4 LT |
226 | |
227 | /* First field starts at bit zero */ | |
228 | ||
229 | info->field_bit_position = 0; | |
230 | ||
231 | /* Process all elements in the field list (of parse nodes) */ | |
232 | ||
233 | while (arg) { | |
234 | /* | |
235 | * Three types of field elements are handled: | |
236 | * 1) Offset - specifies a bit offset | |
237 | * 2) access_as - changes the access mode | |
238 | * 3) Name - Enters a new named field into the namespace | |
239 | */ | |
240 | switch (arg->common.aml_opcode) { | |
241 | case AML_INT_RESERVEDFIELD_OP: | |
242 | ||
243 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 244 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
245 | |
246 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
247 | ACPI_ERROR((AE_INFO, |
248 | "Bit offset within field too large (> 0xFFFFFFFF)")); | |
4be44fcd | 249 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
250 | } |
251 | ||
252 | info->field_bit_position = (u32) position; | |
253 | break; | |
254 | ||
1da177e4 LT |
255 | case AML_INT_ACCESSFIELD_OP: |
256 | ||
257 | /* | |
258 | * Get a new access_type and access_attribute -- to be used for all | |
44f6c012 RM |
259 | * field units that follow, until field end or another access_as |
260 | * keyword. | |
1da177e4 | 261 | * |
44f6c012 RM |
262 | * In field_flags, preserve the flag bits other than the |
263 | * ACCESS_TYPE bits | |
1da177e4 | 264 | */ |
44f6c012 | 265 | info->field_flags = (u8) |
4be44fcd LB |
266 | ((info-> |
267 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | | |
268 | ((u8) ((u32) arg->common.value.integer >> 8))); | |
1da177e4 LT |
269 | |
270 | info->attribute = (u8) (arg->common.value.integer); | |
271 | break; | |
272 | ||
1da177e4 LT |
273 | case AML_INT_NAMEDFIELD_OP: |
274 | ||
cca97b81 | 275 | /* Lookup the name, it should already exist */ |
1da177e4 | 276 | |
4be44fcd LB |
277 | status = acpi_ns_lookup(walk_state->scope_info, |
278 | (char *)&arg->named.name, | |
279 | info->field_type, | |
280 | ACPI_IMODE_EXECUTE, | |
281 | ACPI_NS_DONT_OPEN_SCOPE, | |
282 | walk_state, &info->field_node); | |
283 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
284 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
285 | status); | |
cca97b81 | 286 | return_ACPI_STATUS(status); |
4be44fcd | 287 | } else { |
1da177e4 LT |
288 | arg->common.node = info->field_node; |
289 | info->field_bit_length = arg->common.value.size; | |
290 | ||
ef805d95 | 291 | /* |
cca97b81 BM |
292 | * If there is no object attached to the node, this node was |
293 | * just created and we need to create the field object. | |
294 | * Otherwise, this was a lookup of an existing node and we | |
295 | * don't want to create the field object again. | |
ef805d95 LM |
296 | */ |
297 | if (!acpi_ns_get_attached_object | |
298 | (info->field_node)) { | |
299 | status = acpi_ex_prep_field_value(info); | |
300 | if (ACPI_FAILURE(status)) { | |
301 | return_ACPI_STATUS(status); | |
302 | } | |
1da177e4 LT |
303 | } |
304 | } | |
305 | ||
306 | /* Keep track of bit position for the next field */ | |
307 | ||
308 | position = (acpi_integer) info->field_bit_position | |
4be44fcd | 309 | + (acpi_integer) arg->common.value.size; |
1da177e4 LT |
310 | |
311 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
312 | ACPI_ERROR((AE_INFO, |
313 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", | |
314 | ACPI_CAST_PTR(char, | |
315 | &info->field_node-> | |
316 | name))); | |
4be44fcd | 317 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
318 | } |
319 | ||
320 | info->field_bit_position += info->field_bit_length; | |
321 | break; | |
322 | ||
1da177e4 LT |
323 | default: |
324 | ||
b8e4d893 BM |
325 | ACPI_ERROR((AE_INFO, |
326 | "Invalid opcode in field list: %X", | |
327 | arg->common.aml_opcode)); | |
4be44fcd | 328 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
329 | } |
330 | ||
331 | arg = arg->common.next; | |
332 | } | |
333 | ||
4be44fcd | 334 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
335 | } |
336 | ||
1da177e4 LT |
337 | /******************************************************************************* |
338 | * | |
339 | * FUNCTION: acpi_ds_create_field | |
340 | * | |
341 | * PARAMETERS: Op - Op containing the Field definition and args | |
342 | * region_node - Object for the containing Operation Region | |
343 | * ` walk_state - Current method state | |
344 | * | |
345 | * RETURN: Status | |
346 | * | |
347 | * DESCRIPTION: Create a new field in the specified operation region | |
348 | * | |
349 | ******************************************************************************/ | |
350 | ||
351 | acpi_status | |
4be44fcd LB |
352 | acpi_ds_create_field(union acpi_parse_object *op, |
353 | struct acpi_namespace_node *region_node, | |
354 | struct acpi_walk_state *walk_state) | |
1da177e4 | 355 | { |
4be44fcd LB |
356 | acpi_status status; |
357 | union acpi_parse_object *arg; | |
358 | struct acpi_create_field_info info; | |
1da177e4 | 359 | |
b229cf92 | 360 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
1da177e4 LT |
361 | |
362 | /* First arg is the name of the parent op_region (must already exist) */ | |
363 | ||
364 | arg = op->common.value.arg; | |
365 | if (!region_node) { | |
4be44fcd LB |
366 | status = |
367 | acpi_ns_lookup(walk_state->scope_info, | |
368 | arg->common.value.name, ACPI_TYPE_REGION, | |
369 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
370 | walk_state, ®ion_node); | |
371 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 372 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 373 | return_ACPI_STATUS(status); |
1da177e4 LT |
374 | } |
375 | } | |
376 | ||
377 | /* Second arg is the field flags */ | |
378 | ||
379 | arg = arg->common.next; | |
380 | info.field_flags = (u8) arg->common.value.integer; | |
381 | info.attribute = 0; | |
382 | ||
383 | /* Each remaining arg is a Named Field */ | |
384 | ||
385 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
386 | info.region_node = region_node; | |
387 | ||
4be44fcd | 388 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 389 | |
4be44fcd | 390 | return_ACPI_STATUS(status); |
1da177e4 LT |
391 | } |
392 | ||
1da177e4 LT |
393 | /******************************************************************************* |
394 | * | |
395 | * FUNCTION: acpi_ds_init_field_objects | |
396 | * | |
397 | * PARAMETERS: Op - Op containing the Field definition and args | |
398 | * ` walk_state - Current method state | |
399 | * | |
400 | * RETURN: Status | |
401 | * | |
402 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
403 | * part of the field declaration, enter the name into the | |
404 | * namespace. | |
405 | * | |
406 | ******************************************************************************/ | |
407 | ||
408 | acpi_status | |
4be44fcd LB |
409 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
410 | struct acpi_walk_state *walk_state) | |
1da177e4 | 411 | { |
4be44fcd LB |
412 | acpi_status status; |
413 | union acpi_parse_object *arg = NULL; | |
414 | struct acpi_namespace_node *node; | |
415 | u8 type = 0; | |
ef805d95 | 416 | u32 flags; |
1da177e4 | 417 | |
b229cf92 | 418 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
1da177e4 | 419 | |
cca97b81 BM |
420 | /* Execute flag should always be set when this function is entered */ |
421 | ||
422 | if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { | |
423 | if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) { | |
424 | ||
425 | /* bank_field Op is deferred, just return OK */ | |
426 | ||
427 | return_ACPI_STATUS(AE_OK); | |
428 | } | |
429 | ||
430 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
ef805d95 LM |
431 | } |
432 | ||
cca97b81 BM |
433 | /* |
434 | * Get the field_list argument for this opcode. This is the start of the | |
435 | * list of field elements. | |
436 | */ | |
1da177e4 LT |
437 | switch (walk_state->opcode) { |
438 | case AML_FIELD_OP: | |
4be44fcd | 439 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
440 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
441 | break; | |
442 | ||
443 | case AML_BANK_FIELD_OP: | |
4be44fcd | 444 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
445 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
446 | break; | |
447 | ||
448 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 449 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
450 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
451 | break; | |
452 | ||
453 | default: | |
4be44fcd | 454 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
455 | } |
456 | ||
cca97b81 BM |
457 | /* Creating new namespace node(s), should not already exist */ |
458 | ||
459 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | | |
460 | ACPI_NS_ERROR_IF_FOUND; | |
461 | ||
7f0c826a LM |
462 | /* |
463 | * Mark node(s) temporary if we are executing a normal control | |
464 | * method. (Don't mark if this is a module-level code method) | |
465 | */ | |
466 | if (walk_state->method_node && | |
467 | !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) { | |
cca97b81 BM |
468 | flags |= ACPI_NS_TEMPORARY; |
469 | } | |
470 | ||
1da177e4 LT |
471 | /* |
472 | * Walk the list of entries in the field_list | |
7aa7d433 | 473 | * Note: field_list can be of zero length. In this case, Arg will be NULL. |
1da177e4 LT |
474 | */ |
475 | while (arg) { | |
cca97b81 BM |
476 | /* |
477 | * Ignore OFFSET and ACCESSAS terms here; we are only interested in the | |
478 | * field names in order to enter them into the namespace. | |
479 | */ | |
1da177e4 | 480 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { |
4be44fcd | 481 | status = acpi_ns_lookup(walk_state->scope_info, |
cca97b81 BM |
482 | (char *)&arg->named.name, type, |
483 | ACPI_IMODE_LOAD_PASS1, flags, | |
484 | walk_state, &node); | |
4be44fcd | 485 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
486 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
487 | status); | |
1da177e4 | 488 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 489 | return_ACPI_STATUS(status); |
1da177e4 LT |
490 | } |
491 | ||
492 | /* Name already exists, just ignore this error */ | |
493 | ||
494 | status = AE_OK; | |
495 | } | |
496 | ||
497 | arg->common.node = node; | |
498 | } | |
499 | ||
cca97b81 | 500 | /* Get the next field element in the list */ |
1da177e4 LT |
501 | |
502 | arg = arg->common.next; | |
503 | } | |
504 | ||
4be44fcd | 505 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
506 | } |
507 | ||
1da177e4 LT |
508 | /******************************************************************************* |
509 | * | |
510 | * FUNCTION: acpi_ds_create_bank_field | |
511 | * | |
512 | * PARAMETERS: Op - Op containing the Field definition and args | |
513 | * region_node - Object for the containing Operation Region | |
ef805d95 | 514 | * walk_state - Current method state |
1da177e4 LT |
515 | * |
516 | * RETURN: Status | |
517 | * | |
518 | * DESCRIPTION: Create a new bank field in the specified operation region | |
519 | * | |
520 | ******************************************************************************/ | |
521 | ||
522 | acpi_status | |
4be44fcd LB |
523 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
524 | struct acpi_namespace_node *region_node, | |
525 | struct acpi_walk_state *walk_state) | |
1da177e4 | 526 | { |
4be44fcd LB |
527 | acpi_status status; |
528 | union acpi_parse_object *arg; | |
529 | struct acpi_create_field_info info; | |
1da177e4 | 530 | |
b229cf92 | 531 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
1da177e4 LT |
532 | |
533 | /* First arg is the name of the parent op_region (must already exist) */ | |
534 | ||
535 | arg = op->common.value.arg; | |
536 | if (!region_node) { | |
4be44fcd LB |
537 | status = |
538 | acpi_ns_lookup(walk_state->scope_info, | |
539 | arg->common.value.name, ACPI_TYPE_REGION, | |
540 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
541 | walk_state, ®ion_node); | |
542 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 543 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 544 | return_ACPI_STATUS(status); |
1da177e4 LT |
545 | } |
546 | } | |
547 | ||
548 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
549 | ||
550 | arg = arg->common.next; | |
4be44fcd LB |
551 | status = |
552 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
553 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
554 | ACPI_NS_SEARCH_PARENT, walk_state, | |
555 | &info.register_node); | |
556 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 557 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 558 | return_ACPI_STATUS(status); |
1da177e4 LT |
559 | } |
560 | ||
ef805d95 LM |
561 | /* |
562 | * Third arg is the bank_value | |
563 | * This arg is a term_arg, not a constant | |
564 | * It will be evaluated later, by acpi_ds_eval_bank_field_operands | |
565 | */ | |
1da177e4 | 566 | arg = arg->common.next; |
9c52657a | 567 | |
1da177e4 LT |
568 | /* Fourth arg is the field flags */ |
569 | ||
570 | arg = arg->common.next; | |
571 | info.field_flags = (u8) arg->common.value.integer; | |
572 | ||
573 | /* Each remaining arg is a Named Field */ | |
574 | ||
575 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
576 | info.region_node = region_node; | |
577 | ||
ef805d95 LM |
578 | /* |
579 | * Use Info.data_register_node to store bank_field Op | |
580 | * It's safe because data_register_node will never be used when create bank field | |
581 | * We store aml_start and aml_length in the bank_field Op for late evaluation | |
582 | * Used in acpi_ex_prep_field_value(Info) | |
583 | * | |
584 | * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? | |
585 | */ | |
586 | info.data_register_node = (struct acpi_namespace_node *)op; | |
1da177e4 | 587 | |
ef805d95 | 588 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 589 | return_ACPI_STATUS(status); |
1da177e4 LT |
590 | } |
591 | ||
1da177e4 LT |
592 | /******************************************************************************* |
593 | * | |
594 | * FUNCTION: acpi_ds_create_index_field | |
595 | * | |
596 | * PARAMETERS: Op - Op containing the Field definition and args | |
597 | * region_node - Object for the containing Operation Region | |
598 | * ` walk_state - Current method state | |
599 | * | |
600 | * RETURN: Status | |
601 | * | |
602 | * DESCRIPTION: Create a new index field in the specified operation region | |
603 | * | |
604 | ******************************************************************************/ | |
605 | ||
606 | acpi_status | |
4be44fcd LB |
607 | acpi_ds_create_index_field(union acpi_parse_object *op, |
608 | struct acpi_namespace_node *region_node, | |
609 | struct acpi_walk_state *walk_state) | |
1da177e4 | 610 | { |
4be44fcd LB |
611 | acpi_status status; |
612 | union acpi_parse_object *arg; | |
613 | struct acpi_create_field_info info; | |
1da177e4 | 614 | |
b229cf92 | 615 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
1da177e4 LT |
616 | |
617 | /* First arg is the name of the Index register (must already exist) */ | |
618 | ||
619 | arg = op->common.value.arg; | |
4be44fcd LB |
620 | status = |
621 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
622 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
623 | ACPI_NS_SEARCH_PARENT, walk_state, | |
624 | &info.register_node); | |
625 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 626 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 627 | return_ACPI_STATUS(status); |
1da177e4 LT |
628 | } |
629 | ||
630 | /* Second arg is the data register (must already exist) */ | |
631 | ||
632 | arg = arg->common.next; | |
4be44fcd LB |
633 | status = |
634 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
635 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
636 | ACPI_NS_SEARCH_PARENT, walk_state, | |
637 | &info.data_register_node); | |
638 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 639 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 640 | return_ACPI_STATUS(status); |
1da177e4 LT |
641 | } |
642 | ||
643 | /* Next arg is the field flags */ | |
644 | ||
645 | arg = arg->common.next; | |
646 | info.field_flags = (u8) arg->common.value.integer; | |
647 | ||
648 | /* Each remaining arg is a Named Field */ | |
649 | ||
650 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
651 | info.region_node = region_node; | |
652 | ||
4be44fcd | 653 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
1da177e4 | 654 | |
4be44fcd | 655 | return_ACPI_STATUS(status); |
1da177e4 | 656 | } |