Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsfield - Dispatcher field routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, 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 | 222 | acpi_status status; |
5df7e6cb | 223 | u64 position; |
9ce81784 | 224 | union acpi_parse_object *child; |
1da177e4 | 225 | |
b229cf92 | 226 | ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); |
1da177e4 LT |
227 | |
228 | /* First field starts at bit zero */ | |
229 | ||
230 | info->field_bit_position = 0; | |
231 | ||
232 | /* Process all elements in the field list (of parse nodes) */ | |
233 | ||
234 | while (arg) { | |
235 | /* | |
9ce81784 BM |
236 | * Four types of field elements are handled: |
237 | * 1) Name - Enters a new named field into the namespace | |
238 | * 2) Offset - specifies a bit offset | |
239 | * 3) access_as - changes the access mode/attributes | |
240 | * 4) Connection - Associate a resource template with the field | |
1da177e4 LT |
241 | */ |
242 | switch (arg->common.aml_opcode) { | |
243 | case AML_INT_RESERVEDFIELD_OP: | |
244 | ||
5df7e6cb BM |
245 | position = (u64) info->field_bit_position |
246 | + (u64) arg->common.value.size; | |
1da177e4 LT |
247 | |
248 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
249 | ACPI_ERROR((AE_INFO, |
250 | "Bit offset within field too large (> 0xFFFFFFFF)")); | |
4be44fcd | 251 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
252 | } |
253 | ||
254 | info->field_bit_position = (u32) position; | |
255 | break; | |
256 | ||
1da177e4 | 257 | case AML_INT_ACCESSFIELD_OP: |
9ce81784 | 258 | case AML_INT_EXTACCESSFIELD_OP: |
1da177e4 | 259 | /* |
9ce81784 BM |
260 | * Get new access_type, access_attribute, and access_length fields |
261 | * -- to be used for all field units that follow, until the | |
262 | * end-of-field or another access_as keyword is encountered. | |
263 | * NOTE. These three bytes are encoded in the integer value | |
264 | * of the parseop for convenience. | |
1da177e4 | 265 | * |
44f6c012 | 266 | * In field_flags, preserve the flag bits other than the |
9ce81784 | 267 | * ACCESS_TYPE bits. |
1da177e4 | 268 | */ |
9ce81784 BM |
269 | |
270 | /* access_type (byte_acc, word_acc, etc.) */ | |
271 | ||
44f6c012 | 272 | info->field_flags = (u8) |
4be44fcd LB |
273 | ((info-> |
274 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | | |
9ce81784 BM |
275 | ((u8)((u32)(arg->common.value.integer & 0x07)))); |
276 | ||
277 | /* access_attribute (attrib_quick, attrib_byte, etc.) */ | |
278 | ||
279 | info->attribute = | |
280 | (u8)((arg->common.value.integer >> 8) & 0xFF); | |
281 | ||
282 | /* access_length (for serial/buffer protocols) */ | |
283 | ||
284 | info->access_length = | |
285 | (u8)((arg->common.value.integer >> 16) & 0xFF); | |
286 | break; | |
287 | ||
288 | case AML_INT_CONNECTION_OP: | |
289 | /* | |
290 | * Clear any previous connection. New connection is used for all | |
291 | * fields that follow, similar to access_as | |
292 | */ | |
293 | info->resource_buffer = NULL; | |
294 | info->connection_node = NULL; | |
1da177e4 | 295 | |
9ce81784 BM |
296 | /* |
297 | * A Connection() is either an actual resource descriptor (buffer) | |
298 | * or a named reference to a resource template | |
299 | */ | |
300 | child = arg->common.value.arg; | |
301 | if (child->common.aml_opcode == AML_INT_BYTELIST_OP) { | |
302 | info->resource_buffer = child->named.data; | |
303 | info->resource_length = | |
304 | (u16)child->named.value.integer; | |
305 | } else { | |
306 | /* Lookup the Connection() namepath, it should already exist */ | |
307 | ||
308 | status = acpi_ns_lookup(walk_state->scope_info, | |
309 | child->common.value. | |
310 | name, ACPI_TYPE_ANY, | |
311 | ACPI_IMODE_EXECUTE, | |
312 | ACPI_NS_DONT_OPEN_SCOPE, | |
313 | walk_state, | |
314 | &info->connection_node); | |
315 | if (ACPI_FAILURE(status)) { | |
316 | ACPI_ERROR_NAMESPACE(child->common. | |
317 | value.name, | |
318 | status); | |
319 | return_ACPI_STATUS(status); | |
320 | } | |
321 | } | |
1da177e4 LT |
322 | break; |
323 | ||
1da177e4 LT |
324 | case AML_INT_NAMEDFIELD_OP: |
325 | ||
cca97b81 | 326 | /* Lookup the name, it should already exist */ |
1da177e4 | 327 | |
4be44fcd LB |
328 | status = acpi_ns_lookup(walk_state->scope_info, |
329 | (char *)&arg->named.name, | |
330 | info->field_type, | |
331 | ACPI_IMODE_EXECUTE, | |
332 | ACPI_NS_DONT_OPEN_SCOPE, | |
333 | walk_state, &info->field_node); | |
334 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
335 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
336 | status); | |
cca97b81 | 337 | return_ACPI_STATUS(status); |
4be44fcd | 338 | } else { |
1da177e4 LT |
339 | arg->common.node = info->field_node; |
340 | info->field_bit_length = arg->common.value.size; | |
341 | ||
ef805d95 | 342 | /* |
cca97b81 BM |
343 | * If there is no object attached to the node, this node was |
344 | * just created and we need to create the field object. | |
345 | * Otherwise, this was a lookup of an existing node and we | |
346 | * don't want to create the field object again. | |
ef805d95 LM |
347 | */ |
348 | if (!acpi_ns_get_attached_object | |
349 | (info->field_node)) { | |
350 | status = acpi_ex_prep_field_value(info); | |
351 | if (ACPI_FAILURE(status)) { | |
352 | return_ACPI_STATUS(status); | |
353 | } | |
1da177e4 LT |
354 | } |
355 | } | |
356 | ||
357 | /* Keep track of bit position for the next field */ | |
358 | ||
5df7e6cb BM |
359 | position = (u64) info->field_bit_position |
360 | + (u64) arg->common.value.size; | |
1da177e4 LT |
361 | |
362 | if (position > ACPI_UINT32_MAX) { | |
b8e4d893 BM |
363 | ACPI_ERROR((AE_INFO, |
364 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", | |
365 | ACPI_CAST_PTR(char, | |
366 | &info->field_node-> | |
367 | name))); | |
4be44fcd | 368 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
369 | } |
370 | ||
371 | info->field_bit_position += info->field_bit_length; | |
372 | break; | |
373 | ||
1da177e4 LT |
374 | default: |
375 | ||
b8e4d893 | 376 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 377 | "Invalid opcode in field list: 0x%X", |
b8e4d893 | 378 | arg->common.aml_opcode)); |
4be44fcd | 379 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
380 | } |
381 | ||
382 | arg = arg->common.next; | |
383 | } | |
384 | ||
4be44fcd | 385 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
386 | } |
387 | ||
1da177e4 LT |
388 | /******************************************************************************* |
389 | * | |
390 | * FUNCTION: acpi_ds_create_field | |
391 | * | |
392 | * PARAMETERS: Op - Op containing the Field definition and args | |
393 | * region_node - Object for the containing Operation Region | |
394 | * ` walk_state - Current method state | |
395 | * | |
396 | * RETURN: Status | |
397 | * | |
398 | * DESCRIPTION: Create a new field in the specified operation region | |
399 | * | |
400 | ******************************************************************************/ | |
401 | ||
402 | acpi_status | |
4be44fcd LB |
403 | acpi_ds_create_field(union acpi_parse_object *op, |
404 | struct acpi_namespace_node *region_node, | |
405 | struct acpi_walk_state *walk_state) | |
1da177e4 | 406 | { |
4be44fcd LB |
407 | acpi_status status; |
408 | union acpi_parse_object *arg; | |
409 | struct acpi_create_field_info info; | |
1da177e4 | 410 | |
b229cf92 | 411 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
1da177e4 LT |
412 | |
413 | /* First arg is the name of the parent op_region (must already exist) */ | |
414 | ||
415 | arg = op->common.value.arg; | |
416 | if (!region_node) { | |
4be44fcd LB |
417 | status = |
418 | acpi_ns_lookup(walk_state->scope_info, | |
419 | arg->common.value.name, ACPI_TYPE_REGION, | |
420 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
421 | walk_state, ®ion_node); | |
422 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 423 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 424 | return_ACPI_STATUS(status); |
1da177e4 LT |
425 | } |
426 | } | |
427 | ||
9ce81784 BM |
428 | ACPI_MEMSET(&info, 0, sizeof(struct acpi_create_field_info)); |
429 | ||
1da177e4 LT |
430 | /* Second arg is the field flags */ |
431 | ||
432 | arg = arg->common.next; | |
433 | info.field_flags = (u8) arg->common.value.integer; | |
434 | info.attribute = 0; | |
435 | ||
436 | /* Each remaining arg is a Named Field */ | |
437 | ||
438 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; | |
439 | info.region_node = region_node; | |
440 | ||
4be44fcd | 441 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 442 | return_ACPI_STATUS(status); |
1da177e4 LT |
443 | } |
444 | ||
1da177e4 LT |
445 | /******************************************************************************* |
446 | * | |
447 | * FUNCTION: acpi_ds_init_field_objects | |
448 | * | |
449 | * PARAMETERS: Op - Op containing the Field definition and args | |
450 | * ` walk_state - Current method state | |
451 | * | |
452 | * RETURN: Status | |
453 | * | |
454 | * DESCRIPTION: For each "Field Unit" name in the argument list that is | |
455 | * part of the field declaration, enter the name into the | |
456 | * namespace. | |
457 | * | |
458 | ******************************************************************************/ | |
459 | ||
460 | acpi_status | |
4be44fcd LB |
461 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
462 | struct acpi_walk_state *walk_state) | |
1da177e4 | 463 | { |
4be44fcd LB |
464 | acpi_status status; |
465 | union acpi_parse_object *arg = NULL; | |
466 | struct acpi_namespace_node *node; | |
467 | u8 type = 0; | |
ef805d95 | 468 | u32 flags; |
1da177e4 | 469 | |
b229cf92 | 470 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
1da177e4 | 471 | |
cca97b81 BM |
472 | /* Execute flag should always be set when this function is entered */ |
473 | ||
474 | if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { | |
475 | if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) { | |
476 | ||
477 | /* bank_field Op is deferred, just return OK */ | |
478 | ||
479 | return_ACPI_STATUS(AE_OK); | |
480 | } | |
481 | ||
482 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
ef805d95 LM |
483 | } |
484 | ||
cca97b81 BM |
485 | /* |
486 | * Get the field_list argument for this opcode. This is the start of the | |
487 | * list of field elements. | |
488 | */ | |
1da177e4 LT |
489 | switch (walk_state->opcode) { |
490 | case AML_FIELD_OP: | |
4be44fcd | 491 | arg = acpi_ps_get_arg(op, 2); |
1da177e4 LT |
492 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
493 | break; | |
494 | ||
495 | case AML_BANK_FIELD_OP: | |
4be44fcd | 496 | arg = acpi_ps_get_arg(op, 4); |
1da177e4 LT |
497 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
498 | break; | |
499 | ||
500 | case AML_INDEX_FIELD_OP: | |
4be44fcd | 501 | arg = acpi_ps_get_arg(op, 3); |
1da177e4 LT |
502 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
503 | break; | |
504 | ||
505 | default: | |
4be44fcd | 506 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
507 | } |
508 | ||
cca97b81 BM |
509 | /* Creating new namespace node(s), should not already exist */ |
510 | ||
511 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | | |
512 | ACPI_NS_ERROR_IF_FOUND; | |
513 | ||
7f0c826a LM |
514 | /* |
515 | * Mark node(s) temporary if we are executing a normal control | |
516 | * method. (Don't mark if this is a module-level code method) | |
517 | */ | |
518 | if (walk_state->method_node && | |
519 | !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) { | |
cca97b81 BM |
520 | flags |= ACPI_NS_TEMPORARY; |
521 | } | |
522 | ||
1da177e4 LT |
523 | /* |
524 | * Walk the list of entries in the field_list | |
7aa7d433 | 525 | * Note: field_list can be of zero length. In this case, Arg will be NULL. |
1da177e4 LT |
526 | */ |
527 | while (arg) { | |
cca97b81 | 528 | /* |
9ce81784 BM |
529 | * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested |
530 | * in the field names in order to enter them into the namespace. | |
cca97b81 | 531 | */ |
1da177e4 | 532 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { |
4be44fcd | 533 | status = acpi_ns_lookup(walk_state->scope_info, |
cca97b81 BM |
534 | (char *)&arg->named.name, type, |
535 | ACPI_IMODE_LOAD_PASS1, flags, | |
536 | walk_state, &node); | |
4be44fcd | 537 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
538 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
539 | status); | |
1da177e4 | 540 | if (status != AE_ALREADY_EXISTS) { |
4be44fcd | 541 | return_ACPI_STATUS(status); |
1da177e4 LT |
542 | } |
543 | ||
544 | /* Name already exists, just ignore this error */ | |
545 | ||
546 | status = AE_OK; | |
547 | } | |
548 | ||
549 | arg->common.node = node; | |
550 | } | |
551 | ||
cca97b81 | 552 | /* Get the next field element in the list */ |
1da177e4 LT |
553 | |
554 | arg = arg->common.next; | |
555 | } | |
556 | ||
4be44fcd | 557 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
558 | } |
559 | ||
1da177e4 LT |
560 | /******************************************************************************* |
561 | * | |
562 | * FUNCTION: acpi_ds_create_bank_field | |
563 | * | |
564 | * PARAMETERS: Op - Op containing the Field definition and args | |
565 | * region_node - Object for the containing Operation Region | |
ef805d95 | 566 | * walk_state - Current method state |
1da177e4 LT |
567 | * |
568 | * RETURN: Status | |
569 | * | |
570 | * DESCRIPTION: Create a new bank field in the specified operation region | |
571 | * | |
572 | ******************************************************************************/ | |
573 | ||
574 | acpi_status | |
4be44fcd LB |
575 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
576 | struct acpi_namespace_node *region_node, | |
577 | struct acpi_walk_state *walk_state) | |
1da177e4 | 578 | { |
4be44fcd LB |
579 | acpi_status status; |
580 | union acpi_parse_object *arg; | |
581 | struct acpi_create_field_info info; | |
1da177e4 | 582 | |
b229cf92 | 583 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
1da177e4 LT |
584 | |
585 | /* First arg is the name of the parent op_region (must already exist) */ | |
586 | ||
587 | arg = op->common.value.arg; | |
588 | if (!region_node) { | |
4be44fcd LB |
589 | status = |
590 | acpi_ns_lookup(walk_state->scope_info, | |
591 | arg->common.value.name, ACPI_TYPE_REGION, | |
592 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, | |
593 | walk_state, ®ion_node); | |
594 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 595 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
4be44fcd | 596 | return_ACPI_STATUS(status); |
1da177e4 LT |
597 | } |
598 | } | |
599 | ||
600 | /* Second arg is the Bank Register (Field) (must already exist) */ | |
601 | ||
602 | arg = arg->common.next; | |
4be44fcd LB |
603 | status = |
604 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
605 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
606 | ACPI_NS_SEARCH_PARENT, walk_state, | |
607 | &info.register_node); | |
608 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 609 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 610 | return_ACPI_STATUS(status); |
1da177e4 LT |
611 | } |
612 | ||
ef805d95 LM |
613 | /* |
614 | * Third arg is the bank_value | |
615 | * This arg is a term_arg, not a constant | |
616 | * It will be evaluated later, by acpi_ds_eval_bank_field_operands | |
617 | */ | |
1da177e4 | 618 | arg = arg->common.next; |
9c52657a | 619 | |
1da177e4 LT |
620 | /* Fourth arg is the field flags */ |
621 | ||
622 | arg = arg->common.next; | |
623 | info.field_flags = (u8) arg->common.value.integer; | |
624 | ||
625 | /* Each remaining arg is a Named Field */ | |
626 | ||
627 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; | |
628 | info.region_node = region_node; | |
629 | ||
ef805d95 LM |
630 | /* |
631 | * Use Info.data_register_node to store bank_field Op | |
632 | * It's safe because data_register_node will never be used when create bank field | |
633 | * We store aml_start and aml_length in the bank_field Op for late evaluation | |
634 | * Used in acpi_ex_prep_field_value(Info) | |
635 | * | |
636 | * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? | |
637 | */ | |
638 | info.data_register_node = (struct acpi_namespace_node *)op; | |
1da177e4 | 639 | |
ef805d95 | 640 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 641 | return_ACPI_STATUS(status); |
1da177e4 LT |
642 | } |
643 | ||
1da177e4 LT |
644 | /******************************************************************************* |
645 | * | |
646 | * FUNCTION: acpi_ds_create_index_field | |
647 | * | |
648 | * PARAMETERS: Op - Op containing the Field definition and args | |
649 | * region_node - Object for the containing Operation Region | |
650 | * ` walk_state - Current method state | |
651 | * | |
652 | * RETURN: Status | |
653 | * | |
654 | * DESCRIPTION: Create a new index field in the specified operation region | |
655 | * | |
656 | ******************************************************************************/ | |
657 | ||
658 | acpi_status | |
4be44fcd LB |
659 | acpi_ds_create_index_field(union acpi_parse_object *op, |
660 | struct acpi_namespace_node *region_node, | |
661 | struct acpi_walk_state *walk_state) | |
1da177e4 | 662 | { |
4be44fcd LB |
663 | acpi_status status; |
664 | union acpi_parse_object *arg; | |
665 | struct acpi_create_field_info info; | |
1da177e4 | 666 | |
b229cf92 | 667 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
1da177e4 LT |
668 | |
669 | /* First arg is the name of the Index register (must already exist) */ | |
670 | ||
671 | arg = op->common.value.arg; | |
4be44fcd LB |
672 | status = |
673 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
674 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
675 | ACPI_NS_SEARCH_PARENT, walk_state, | |
676 | &info.register_node); | |
677 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 678 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 679 | return_ACPI_STATUS(status); |
1da177e4 LT |
680 | } |
681 | ||
682 | /* Second arg is the data register (must already exist) */ | |
683 | ||
684 | arg = arg->common.next; | |
4be44fcd LB |
685 | status = |
686 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, | |
687 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, | |
688 | ACPI_NS_SEARCH_PARENT, walk_state, | |
689 | &info.data_register_node); | |
690 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 691 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
4be44fcd | 692 | return_ACPI_STATUS(status); |
1da177e4 LT |
693 | } |
694 | ||
695 | /* Next arg is the field flags */ | |
696 | ||
697 | arg = arg->common.next; | |
698 | info.field_flags = (u8) arg->common.value.integer; | |
699 | ||
700 | /* Each remaining arg is a Named Field */ | |
701 | ||
702 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; | |
703 | info.region_node = region_node; | |
704 | ||
4be44fcd | 705 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
4be44fcd | 706 | return_ACPI_STATUS(status); |
1da177e4 | 707 | } |