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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: excreate - Named object creation | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acinterp.h> | |
47 | #include <acpi/amlcode.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | #include <acpi/acevents.h> | |
50 | #include <acpi/actables.h> | |
51 | ||
52 | ||
53 | #define _COMPONENT ACPI_EXECUTER | |
54 | ACPI_MODULE_NAME ("excreate") | |
55 | ||
56 | ||
57 | #ifndef ACPI_NO_METHOD_EXECUTION | |
58 | /***************************************************************************** | |
59 | * | |
60 | * FUNCTION: acpi_ex_create_alias | |
61 | * | |
62 | * PARAMETERS: walk_state - Current state, contains operands | |
63 | * | |
64 | * RETURN: Status | |
65 | * | |
66 | * DESCRIPTION: Create a new named alias | |
67 | * | |
68 | ****************************************************************************/ | |
69 | ||
70 | acpi_status | |
71 | acpi_ex_create_alias ( | |
72 | struct acpi_walk_state *walk_state) | |
73 | { | |
74 | struct acpi_namespace_node *target_node; | |
75 | struct acpi_namespace_node *alias_node; | |
76 | acpi_status status = AE_OK; | |
77 | ||
78 | ||
79 | ACPI_FUNCTION_TRACE ("ex_create_alias"); | |
80 | ||
81 | ||
82 | /* Get the source/alias operands (both namespace nodes) */ | |
83 | ||
84 | alias_node = (struct acpi_namespace_node *) walk_state->operands[0]; | |
85 | target_node = (struct acpi_namespace_node *) walk_state->operands[1]; | |
86 | ||
87 | if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) || | |
88 | (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { | |
89 | /* | |
90 | * Dereference an existing alias so that we don't create a chain | |
91 | * of aliases. With this code, we guarantee that an alias is | |
92 | * always exactly one level of indirection away from the | |
93 | * actual aliased name. | |
94 | */ | |
95 | target_node = ACPI_CAST_PTR (struct acpi_namespace_node, target_node->object); | |
96 | } | |
97 | ||
98 | /* | |
99 | * For objects that can never change (i.e., the NS node will | |
100 | * permanently point to the same object), we can simply attach | |
101 | * the object to the new NS node. For other objects (such as | |
102 | * Integers, buffers, etc.), we have to point the Alias node | |
103 | * to the original Node. | |
104 | */ | |
105 | switch (target_node->type) { | |
106 | case ACPI_TYPE_INTEGER: | |
107 | case ACPI_TYPE_STRING: | |
108 | case ACPI_TYPE_BUFFER: | |
109 | case ACPI_TYPE_PACKAGE: | |
110 | case ACPI_TYPE_BUFFER_FIELD: | |
111 | ||
112 | /* | |
113 | * The new alias has the type ALIAS and points to the original | |
114 | * NS node, not the object itself. This is because for these | |
115 | * types, the object can change dynamically via a Store. | |
116 | */ | |
117 | alias_node->type = ACPI_TYPE_LOCAL_ALIAS; | |
118 | alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node); | |
119 | break; | |
120 | ||
121 | case ACPI_TYPE_METHOD: | |
122 | ||
123 | /* | |
124 | * The new alias has the type ALIAS and points to the original | |
125 | * NS node, not the object itself. This is because for these | |
126 | * types, the object can change dynamically via a Store. | |
127 | */ | |
128 | alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS; | |
129 | alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node); | |
130 | break; | |
131 | ||
132 | default: | |
133 | ||
134 | /* Attach the original source object to the new Alias Node */ | |
135 | ||
136 | /* | |
137 | * The new alias assumes the type of the target, and it points | |
138 | * to the same object. The reference count of the object has an | |
139 | * additional reference to prevent deletion out from under either the | |
140 | * target node or the alias Node | |
141 | */ | |
142 | status = acpi_ns_attach_object (alias_node, | |
143 | acpi_ns_get_attached_object (target_node), | |
144 | target_node->type); | |
145 | break; | |
146 | } | |
147 | ||
148 | /* Since both operands are Nodes, we don't need to delete them */ | |
149 | ||
150 | return_ACPI_STATUS (status); | |
151 | } | |
152 | ||
153 | ||
154 | /***************************************************************************** | |
155 | * | |
156 | * FUNCTION: acpi_ex_create_event | |
157 | * | |
158 | * PARAMETERS: walk_state - Current state | |
159 | * | |
160 | * RETURN: Status | |
161 | * | |
162 | * DESCRIPTION: Create a new event object | |
163 | * | |
164 | ****************************************************************************/ | |
165 | ||
166 | acpi_status | |
167 | acpi_ex_create_event ( | |
168 | struct acpi_walk_state *walk_state) | |
169 | { | |
170 | acpi_status status; | |
171 | union acpi_operand_object *obj_desc; | |
172 | ||
173 | ||
174 | ACPI_FUNCTION_TRACE ("ex_create_event"); | |
175 | ||
176 | ||
177 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_EVENT); | |
178 | if (!obj_desc) { | |
179 | status = AE_NO_MEMORY; | |
180 | goto cleanup; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Create the actual OS semaphore, with zero initial units -- meaning | |
185 | * that the event is created in an unsignalled state | |
186 | */ | |
187 | status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 0, | |
188 | &obj_desc->event.semaphore); | |
189 | if (ACPI_FAILURE (status)) { | |
190 | goto cleanup; | |
191 | } | |
192 | ||
193 | /* Attach object to the Node */ | |
194 | ||
195 | status = acpi_ns_attach_object ((struct acpi_namespace_node *) walk_state->operands[0], | |
196 | obj_desc, ACPI_TYPE_EVENT); | |
197 | ||
198 | cleanup: | |
199 | /* | |
200 | * Remove local reference to the object (on error, will cause deletion | |
201 | * of both object and semaphore if present.) | |
202 | */ | |
203 | acpi_ut_remove_reference (obj_desc); | |
204 | return_ACPI_STATUS (status); | |
205 | } | |
206 | ||
207 | ||
208 | /***************************************************************************** | |
209 | * | |
210 | * FUNCTION: acpi_ex_create_mutex | |
211 | * | |
212 | * PARAMETERS: walk_state - Current state | |
213 | * | |
214 | * RETURN: Status | |
215 | * | |
216 | * DESCRIPTION: Create a new mutex object | |
217 | * | |
218 | * Mutex (Name[0], sync_level[1]) | |
219 | * | |
220 | ****************************************************************************/ | |
221 | ||
222 | acpi_status | |
223 | acpi_ex_create_mutex ( | |
224 | struct acpi_walk_state *walk_state) | |
225 | { | |
226 | acpi_status status = AE_OK; | |
227 | union acpi_operand_object *obj_desc; | |
228 | ||
229 | ||
230 | ACPI_FUNCTION_TRACE_PTR ("ex_create_mutex", ACPI_WALK_OPERANDS); | |
231 | ||
232 | ||
233 | /* Create the new mutex object */ | |
234 | ||
235 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_MUTEX); | |
236 | if (!obj_desc) { | |
237 | status = AE_NO_MEMORY; | |
238 | goto cleanup; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Create the actual OS semaphore. | |
243 | * One unit max to make it a mutex, with one initial unit to allow | |
244 | * the mutex to be acquired. | |
245 | */ | |
246 | status = acpi_os_create_semaphore (1, 1, &obj_desc->mutex.semaphore); | |
247 | if (ACPI_FAILURE (status)) { | |
248 | goto cleanup; | |
249 | } | |
250 | ||
251 | /* Init object and attach to NS node */ | |
252 | ||
253 | obj_desc->mutex.sync_level = (u8) walk_state->operands[1]->integer.value; | |
254 | obj_desc->mutex.node = (struct acpi_namespace_node *) walk_state->operands[0]; | |
255 | ||
256 | status = acpi_ns_attach_object (obj_desc->mutex.node, | |
257 | obj_desc, ACPI_TYPE_MUTEX); | |
258 | ||
259 | ||
260 | cleanup: | |
261 | /* | |
262 | * Remove local reference to the object (on error, will cause deletion | |
263 | * of both object and semaphore if present.) | |
264 | */ | |
265 | acpi_ut_remove_reference (obj_desc); | |
266 | return_ACPI_STATUS (status); | |
267 | } | |
268 | ||
269 | ||
270 | /***************************************************************************** | |
271 | * | |
272 | * FUNCTION: acpi_ex_create_region | |
273 | * | |
274 | * PARAMETERS: aml_start - Pointer to the region declaration AML | |
275 | * aml_length - Max length of the declaration AML | |
276 | * Operands - List of operands for the opcode | |
277 | * walk_state - Current state | |
278 | * | |
279 | * RETURN: Status | |
280 | * | |
281 | * DESCRIPTION: Create a new operation region object | |
282 | * | |
283 | ****************************************************************************/ | |
284 | ||
285 | acpi_status | |
286 | acpi_ex_create_region ( | |
287 | u8 *aml_start, | |
288 | u32 aml_length, | |
289 | u8 region_space, | |
290 | struct acpi_walk_state *walk_state) | |
291 | { | |
292 | acpi_status status; | |
293 | union acpi_operand_object *obj_desc; | |
294 | struct acpi_namespace_node *node; | |
295 | union acpi_operand_object *region_obj2; | |
296 | ||
297 | ||
298 | ACPI_FUNCTION_TRACE ("ex_create_region"); | |
299 | ||
300 | ||
301 | /* Get the Namespace Node */ | |
302 | ||
303 | node = walk_state->op->common.node; | |
304 | ||
305 | /* | |
306 | * If the region object is already attached to this node, | |
307 | * just return | |
308 | */ | |
309 | if (acpi_ns_get_attached_object (node)) { | |
310 | return_ACPI_STATUS (AE_OK); | |
311 | } | |
312 | ||
313 | /* | |
314 | * Space ID must be one of the predefined IDs, or in the user-defined | |
315 | * range | |
316 | */ | |
317 | if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) && | |
318 | (region_space < ACPI_USER_REGION_BEGIN)) { | |
319 | ACPI_REPORT_ERROR (("Invalid address_space type %X\n", region_space)); | |
320 | return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID); | |
321 | } | |
322 | ||
323 | ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n", | |
324 | acpi_ut_get_region_name (region_space), region_space)); | |
325 | ||
326 | /* Create the region descriptor */ | |
327 | ||
328 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION); | |
329 | if (!obj_desc) { | |
330 | status = AE_NO_MEMORY; | |
331 | goto cleanup; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Remember location in AML stream of address & length | |
336 | * operands since they need to be evaluated at run time. | |
337 | */ | |
338 | region_obj2 = obj_desc->common.next_object; | |
339 | region_obj2->extra.aml_start = aml_start; | |
340 | region_obj2->extra.aml_length = aml_length; | |
341 | ||
342 | /* Init the region from the operands */ | |
343 | ||
344 | obj_desc->region.space_id = region_space; | |
345 | obj_desc->region.address = 0; | |
346 | obj_desc->region.length = 0; | |
347 | obj_desc->region.node = node; | |
348 | ||
349 | /* Install the new region object in the parent Node */ | |
350 | ||
351 | status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION); | |
352 | ||
353 | ||
354 | cleanup: | |
355 | ||
356 | /* Remove local reference to the object */ | |
357 | ||
358 | acpi_ut_remove_reference (obj_desc); | |
359 | return_ACPI_STATUS (status); | |
360 | } | |
361 | ||
362 | ||
363 | /***************************************************************************** | |
364 | * | |
365 | * FUNCTION: acpi_ex_create_table_region | |
366 | * | |
367 | * PARAMETERS: walk_state - Current state | |
368 | * | |
369 | * RETURN: Status | |
370 | * | |
371 | * DESCRIPTION: Create a new data_table_region object | |
372 | * | |
373 | ****************************************************************************/ | |
374 | ||
375 | acpi_status | |
376 | acpi_ex_create_table_region ( | |
377 | struct acpi_walk_state *walk_state) | |
378 | { | |
379 | acpi_status status; | |
380 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
381 | union acpi_operand_object *obj_desc; | |
382 | struct acpi_namespace_node *node; | |
383 | struct acpi_table_header *table; | |
384 | union acpi_operand_object *region_obj2; | |
385 | ||
386 | ||
387 | ACPI_FUNCTION_TRACE ("ex_create_table_region"); | |
388 | ||
389 | ||
390 | /* Get the Node from the object stack */ | |
391 | ||
392 | node = walk_state->op->common.node; | |
393 | ||
394 | /* | |
395 | * If the region object is already attached to this node, | |
396 | * just return | |
397 | */ | |
398 | if (acpi_ns_get_attached_object (node)) { | |
399 | return_ACPI_STATUS (AE_OK); | |
400 | } | |
401 | ||
402 | /* Find the ACPI table */ | |
403 | ||
404 | status = acpi_tb_find_table (operand[1]->string.pointer, | |
405 | operand[2]->string.pointer, | |
406 | operand[3]->string.pointer, &table); | |
407 | if (ACPI_FAILURE (status)) { | |
408 | return_ACPI_STATUS (status); | |
409 | } | |
410 | ||
411 | /* Create the region descriptor */ | |
412 | ||
413 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION); | |
414 | if (!obj_desc) { | |
415 | return_ACPI_STATUS (AE_NO_MEMORY); | |
416 | } | |
417 | ||
418 | region_obj2 = obj_desc->common.next_object; | |
419 | region_obj2->extra.region_context = NULL; | |
420 | ||
421 | /* Init the region from the operands */ | |
422 | ||
423 | obj_desc->region.space_id = REGION_DATA_TABLE; | |
424 | obj_desc->region.address = (acpi_physical_address) ACPI_TO_INTEGER (table); | |
425 | obj_desc->region.length = table->length; | |
426 | obj_desc->region.node = node; | |
427 | obj_desc->region.flags = AOPOBJ_DATA_VALID; | |
428 | ||
429 | /* Install the new region object in the parent Node */ | |
430 | ||
431 | status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION); | |
432 | if (ACPI_FAILURE (status)) { | |
433 | goto cleanup; | |
434 | } | |
435 | ||
436 | status = acpi_ev_initialize_region (obj_desc, FALSE); | |
437 | if (ACPI_FAILURE (status)) { | |
438 | if (status == AE_NOT_EXIST) { | |
439 | status = AE_OK; | |
440 | } | |
441 | else { | |
442 | goto cleanup; | |
443 | } | |
444 | } | |
445 | ||
446 | obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
447 | ||
448 | ||
449 | cleanup: | |
450 | ||
451 | /* Remove local reference to the object */ | |
452 | ||
453 | acpi_ut_remove_reference (obj_desc); | |
454 | return_ACPI_STATUS (status); | |
455 | } | |
456 | ||
457 | ||
458 | /***************************************************************************** | |
459 | * | |
460 | * FUNCTION: acpi_ex_create_processor | |
461 | * | |
462 | * PARAMETERS: walk_state - Current state | |
463 | * | |
464 | * RETURN: Status | |
465 | * | |
466 | * DESCRIPTION: Create a new processor object and populate the fields | |
467 | * | |
468 | * Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3]) | |
469 | * | |
470 | ****************************************************************************/ | |
471 | ||
472 | acpi_status | |
473 | acpi_ex_create_processor ( | |
474 | struct acpi_walk_state *walk_state) | |
475 | { | |
476 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
477 | union acpi_operand_object *obj_desc; | |
478 | acpi_status status; | |
479 | ||
480 | ||
481 | ACPI_FUNCTION_TRACE_PTR ("ex_create_processor", walk_state); | |
482 | ||
483 | ||
484 | /* Create the processor object */ | |
485 | ||
486 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PROCESSOR); | |
487 | if (!obj_desc) { | |
488 | return_ACPI_STATUS (AE_NO_MEMORY); | |
489 | } | |
490 | ||
491 | /* | |
492 | * Initialize the processor object from the operands | |
493 | */ | |
494 | obj_desc->processor.proc_id = (u8) operand[1]->integer.value; | |
495 | obj_desc->processor.address = (acpi_io_address) operand[2]->integer.value; | |
496 | obj_desc->processor.length = (u8) operand[3]->integer.value; | |
497 | ||
498 | /* Install the processor object in the parent Node */ | |
499 | ||
500 | status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0], | |
501 | obj_desc, ACPI_TYPE_PROCESSOR); | |
502 | ||
503 | /* Remove local reference to the object */ | |
504 | ||
505 | acpi_ut_remove_reference (obj_desc); | |
506 | return_ACPI_STATUS (status); | |
507 | } | |
508 | ||
509 | ||
510 | /***************************************************************************** | |
511 | * | |
512 | * FUNCTION: acpi_ex_create_power_resource | |
513 | * | |
514 | * PARAMETERS: walk_state - Current state | |
515 | * | |
516 | * RETURN: Status | |
517 | * | |
518 | * DESCRIPTION: Create a new power_resource object and populate the fields | |
519 | * | |
520 | * power_resource (Name[0], system_level[1], resource_order[2]) | |
521 | * | |
522 | ****************************************************************************/ | |
523 | ||
524 | acpi_status | |
525 | acpi_ex_create_power_resource ( | |
526 | struct acpi_walk_state *walk_state) | |
527 | { | |
528 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
529 | acpi_status status; | |
530 | union acpi_operand_object *obj_desc; | |
531 | ||
532 | ||
533 | ACPI_FUNCTION_TRACE_PTR ("ex_create_power_resource", walk_state); | |
534 | ||
535 | ||
536 | /* Create the power resource object */ | |
537 | ||
538 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_POWER); | |
539 | if (!obj_desc) { | |
540 | return_ACPI_STATUS (AE_NO_MEMORY); | |
541 | } | |
542 | ||
543 | /* Initialize the power object from the operands */ | |
544 | ||
545 | obj_desc->power_resource.system_level = (u8) operand[1]->integer.value; | |
546 | obj_desc->power_resource.resource_order = (u16) operand[2]->integer.value; | |
547 | ||
548 | /* Install the power resource object in the parent Node */ | |
549 | ||
550 | status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0], | |
551 | obj_desc, ACPI_TYPE_POWER); | |
552 | ||
553 | /* Remove local reference to the object */ | |
554 | ||
555 | acpi_ut_remove_reference (obj_desc); | |
556 | return_ACPI_STATUS (status); | |
557 | } | |
558 | ||
559 | #endif | |
560 | ||
561 | /***************************************************************************** | |
562 | * | |
563 | * FUNCTION: acpi_ex_create_method | |
564 | * | |
565 | * PARAMETERS: aml_start - First byte of the method's AML | |
566 | * aml_length - AML byte count for this method | |
567 | * walk_state - Current state | |
568 | * | |
569 | * RETURN: Status | |
570 | * | |
571 | * DESCRIPTION: Create a new method object | |
572 | * | |
573 | ****************************************************************************/ | |
574 | ||
575 | acpi_status | |
576 | acpi_ex_create_method ( | |
577 | u8 *aml_start, | |
578 | u32 aml_length, | |
579 | struct acpi_walk_state *walk_state) | |
580 | { | |
581 | union acpi_operand_object **operand = &walk_state->operands[0]; | |
582 | union acpi_operand_object *obj_desc; | |
583 | acpi_status status; | |
584 | u8 method_flags; | |
585 | ||
586 | ||
587 | ACPI_FUNCTION_TRACE_PTR ("ex_create_method", walk_state); | |
588 | ||
589 | ||
590 | /* Create a new method object */ | |
591 | ||
592 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_METHOD); | |
593 | if (!obj_desc) { | |
594 | return_ACPI_STATUS (AE_NO_MEMORY); | |
595 | } | |
596 | ||
597 | /* Save the method's AML pointer and length */ | |
598 | ||
599 | obj_desc->method.aml_start = aml_start; | |
600 | obj_desc->method.aml_length = aml_length; | |
601 | ||
602 | /* | |
603 | * Disassemble the method flags. Split off the Arg Count | |
604 | * for efficiency | |
605 | */ | |
606 | method_flags = (u8) operand[1]->integer.value; | |
607 | ||
608 | obj_desc->method.method_flags = (u8) (method_flags & ~AML_METHOD_ARG_COUNT); | |
609 | obj_desc->method.param_count = (u8) (method_flags & AML_METHOD_ARG_COUNT); | |
610 | ||
611 | /* | |
612 | * Get the concurrency count. If required, a semaphore will be | |
613 | * created for this method when it is parsed. | |
614 | */ | |
615 | if (acpi_gbl_all_methods_serialized) { | |
616 | obj_desc->method.concurrency = 1; | |
617 | obj_desc->method.method_flags |= AML_METHOD_SERIALIZED; | |
618 | } | |
619 | else if (method_flags & AML_METHOD_SERIALIZED) { | |
620 | /* | |
621 | * ACPI 1.0: Concurrency = 1 | |
622 | * ACPI 2.0: Concurrency = (sync_level (in method declaration) + 1) | |
623 | */ | |
624 | obj_desc->method.concurrency = (u8) | |
625 | (((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1); | |
626 | } | |
627 | else { | |
628 | obj_desc->method.concurrency = ACPI_INFINITE_CONCURRENCY; | |
629 | } | |
630 | ||
631 | /* Attach the new object to the method Node */ | |
632 | ||
633 | status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0], | |
634 | obj_desc, ACPI_TYPE_METHOD); | |
635 | ||
636 | /* Remove local reference to the object */ | |
637 | ||
638 | acpi_ut_remove_reference (obj_desc); | |
639 | ||
640 | /* Remove a reference to the operand */ | |
641 | ||
642 | acpi_ut_remove_reference (operand[1]); | |
643 | return_ACPI_STATUS (status); | |
644 | } | |
645 | ||
646 |