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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evmisc - Miscellaneous event manager support functions | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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 | ||
44 | #include <acpi/acpi.h> | |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | #include <acpi/acinterp.h> | |
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evmisc") |
1da177e4 | 51 | |
44f6c012 | 52 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 53 | static const char *acpi_notify_value_names[] = { |
44f6c012 RM |
54 | "Bus Check", |
55 | "Device Check", | |
56 | "Device Wake", | |
57 | "Eject request", | |
58 | "Device Check Light", | |
59 | "Frequency Mismatch", | |
60 | "Bus Mode Mismatch", | |
61 | "Power Fault" | |
62 | }; | |
63 | #endif | |
64 | ||
65 | /* Local prototypes */ | |
66 | ||
4be44fcd | 67 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
44f6c012 | 68 | |
4be44fcd | 69 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context); |
44f6c012 | 70 | |
4be44fcd | 71 | static u32 acpi_ev_global_lock_handler(void *context); |
44f6c012 | 72 | |
1da177e4 LT |
73 | /******************************************************************************* |
74 | * | |
75 | * FUNCTION: acpi_ev_is_notify_object | |
76 | * | |
77 | * PARAMETERS: Node - Node to check | |
78 | * | |
79 | * RETURN: TRUE if notifies allowed on this object | |
80 | * | |
81 | * DESCRIPTION: Check type of node for a object that supports notifies. | |
82 | * | |
83 | * TBD: This could be replaced by a flag bit in the node. | |
84 | * | |
85 | ******************************************************************************/ | |
86 | ||
4be44fcd | 87 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
1da177e4 LT |
88 | { |
89 | switch (node->type) { | |
90 | case ACPI_TYPE_DEVICE: | |
91 | case ACPI_TYPE_PROCESSOR: | |
92 | case ACPI_TYPE_POWER: | |
93 | case ACPI_TYPE_THERMAL: | |
94 | /* | |
95 | * These are the ONLY objects that can receive ACPI notifications | |
96 | */ | |
97 | return (TRUE); | |
98 | ||
99 | default: | |
100 | return (FALSE); | |
101 | } | |
102 | } | |
103 | ||
1da177e4 LT |
104 | /******************************************************************************* |
105 | * | |
106 | * FUNCTION: acpi_ev_queue_notify_request | |
107 | * | |
108 | * PARAMETERS: Node - NS node for the notified object | |
109 | * notify_value - Value from the Notify() request | |
110 | * | |
111 | * RETURN: Status | |
112 | * | |
113 | * DESCRIPTION: Dispatch a device notification event to a previously | |
114 | * installed handler. | |
115 | * | |
116 | ******************************************************************************/ | |
117 | ||
1da177e4 | 118 | acpi_status |
4be44fcd LB |
119 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
120 | u32 notify_value) | |
1da177e4 | 121 | { |
4be44fcd LB |
122 | union acpi_operand_object *obj_desc; |
123 | union acpi_operand_object *handler_obj = NULL; | |
124 | union acpi_generic_state *notify_info; | |
125 | acpi_status status = AE_OK; | |
1da177e4 | 126 | |
4be44fcd | 127 | ACPI_FUNCTION_NAME("ev_queue_notify_request"); |
1da177e4 LT |
128 | |
129 | /* | |
130 | * For value 3 (Ejection Request), some device method may need to be run. | |
44f6c012 RM |
131 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need |
132 | * to be run. | |
1da177e4 | 133 | * For value 0x80 (Status Change) on the power button or sleep button, |
44f6c012 | 134 | * initiate soft-off or sleep operation? |
1da177e4 | 135 | */ |
4be44fcd LB |
136 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
137 | "Dispatching Notify(%X) on node %p\n", notify_value, | |
138 | node)); | |
1da177e4 LT |
139 | |
140 | if (notify_value <= 7) { | |
4be44fcd LB |
141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notify value: %s\n", |
142 | acpi_notify_value_names[notify_value])); | |
143 | } else { | |
144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
145 | "Notify value: 0x%2.2X **Device Specific**\n", | |
146 | notify_value)); | |
1da177e4 LT |
147 | } |
148 | ||
149 | /* Get the notify object attached to the NS Node */ | |
150 | ||
4be44fcd | 151 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
152 | if (obj_desc) { |
153 | /* We have the notify object, Get the right handler */ | |
154 | ||
155 | switch (node->type) { | |
156 | case ACPI_TYPE_DEVICE: | |
157 | case ACPI_TYPE_THERMAL: | |
158 | case ACPI_TYPE_PROCESSOR: | |
159 | case ACPI_TYPE_POWER: | |
160 | ||
161 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { | |
4be44fcd LB |
162 | handler_obj = |
163 | obj_desc->common_notify.system_notify; | |
164 | } else { | |
165 | handler_obj = | |
166 | obj_desc->common_notify.device_notify; | |
1da177e4 LT |
167 | } |
168 | break; | |
169 | ||
170 | default: | |
171 | /* All other types are not supported */ | |
172 | return (AE_TYPE); | |
173 | } | |
174 | } | |
175 | ||
176 | /* If there is any handler to run, schedule the dispatcher */ | |
177 | ||
4be44fcd LB |
178 | if ((acpi_gbl_system_notify.handler |
179 | && (notify_value <= ACPI_MAX_SYS_NOTIFY)) | |
180 | || (acpi_gbl_device_notify.handler | |
181 | && (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { | |
182 | notify_info = acpi_ut_create_generic_state(); | |
1da177e4 LT |
183 | if (!notify_info) { |
184 | return (AE_NO_MEMORY); | |
185 | } | |
186 | ||
187 | notify_info->common.data_type = ACPI_DESC_TYPE_STATE_NOTIFY; | |
4be44fcd LB |
188 | notify_info->notify.node = node; |
189 | notify_info->notify.value = (u16) notify_value; | |
1da177e4 LT |
190 | notify_info->notify.handler_obj = handler_obj; |
191 | ||
4be44fcd LB |
192 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, |
193 | acpi_ev_notify_dispatch, | |
194 | notify_info); | |
195 | if (ACPI_FAILURE(status)) { | |
196 | acpi_ut_delete_generic_state(notify_info); | |
1da177e4 LT |
197 | } |
198 | } | |
199 | ||
200 | if (!handler_obj) { | |
201 | /* | |
202 | * There is no per-device notify handler for this device. | |
203 | * This may or may not be a problem. | |
204 | */ | |
4be44fcd LB |
205 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
206 | "No notify handler for Notify(%4.4s, %X) node %p\n", | |
207 | acpi_ut_get_node_name(node), notify_value, | |
208 | node)); | |
1da177e4 LT |
209 | } |
210 | ||
211 | return (status); | |
212 | } | |
213 | ||
1da177e4 LT |
214 | /******************************************************************************* |
215 | * | |
216 | * FUNCTION: acpi_ev_notify_dispatch | |
217 | * | |
44f6c012 | 218 | * PARAMETERS: Context - To be passed to the notify handler |
1da177e4 LT |
219 | * |
220 | * RETURN: None. | |
221 | * | |
222 | * DESCRIPTION: Dispatch a device notification event to a previously | |
223 | * installed handler. | |
224 | * | |
225 | ******************************************************************************/ | |
226 | ||
4be44fcd | 227 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
1da177e4 | 228 | { |
4be44fcd LB |
229 | union acpi_generic_state *notify_info = |
230 | (union acpi_generic_state *)context; | |
231 | acpi_notify_handler global_handler = NULL; | |
232 | void *global_context = NULL; | |
233 | union acpi_operand_object *handler_obj; | |
1da177e4 | 234 | |
4be44fcd | 235 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
236 | |
237 | /* | |
238 | * We will invoke a global notify handler if installed. | |
44f6c012 RM |
239 | * This is done _before_ we invoke the per-device handler attached |
240 | * to the device. | |
1da177e4 LT |
241 | */ |
242 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { | |
243 | /* Global system notification handler */ | |
244 | ||
245 | if (acpi_gbl_system_notify.handler) { | |
246 | global_handler = acpi_gbl_system_notify.handler; | |
247 | global_context = acpi_gbl_system_notify.context; | |
248 | } | |
4be44fcd | 249 | } else { |
1da177e4 LT |
250 | /* Global driver notification handler */ |
251 | ||
252 | if (acpi_gbl_device_notify.handler) { | |
253 | global_handler = acpi_gbl_device_notify.handler; | |
254 | global_context = acpi_gbl_device_notify.context; | |
255 | } | |
256 | } | |
257 | ||
258 | /* Invoke the system handler first, if present */ | |
259 | ||
260 | if (global_handler) { | |
4be44fcd LB |
261 | global_handler(notify_info->notify.node, |
262 | notify_info->notify.value, global_context); | |
1da177e4 LT |
263 | } |
264 | ||
265 | /* Now invoke the per-device handler, if present */ | |
266 | ||
267 | handler_obj = notify_info->notify.handler_obj; | |
268 | if (handler_obj) { | |
4be44fcd LB |
269 | handler_obj->notify.handler(notify_info->notify.node, |
270 | notify_info->notify.value, | |
271 | handler_obj->notify.context); | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* All done with the info object */ | |
275 | ||
4be44fcd | 276 | acpi_ut_delete_generic_state(notify_info); |
1da177e4 LT |
277 | } |
278 | ||
1da177e4 LT |
279 | /******************************************************************************* |
280 | * | |
281 | * FUNCTION: acpi_ev_global_lock_thread | |
282 | * | |
283 | * PARAMETERS: Context - From thread interface, not used | |
284 | * | |
285 | * RETURN: None | |
286 | * | |
287 | * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the | |
288 | * Global Lock. Simply signal all threads that are waiting | |
289 | * for the lock. | |
290 | * | |
291 | ******************************************************************************/ | |
292 | ||
4be44fcd | 293 | static void ACPI_SYSTEM_XFACE acpi_ev_global_lock_thread(void *context) |
1da177e4 | 294 | { |
4be44fcd | 295 | acpi_status status; |
1da177e4 LT |
296 | |
297 | /* Signal threads that are waiting for the lock */ | |
298 | ||
299 | if (acpi_gbl_global_lock_thread_count) { | |
300 | /* Send sufficient units to the semaphore */ | |
301 | ||
4be44fcd LB |
302 | status = |
303 | acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, | |
304 | acpi_gbl_global_lock_thread_count); | |
305 | if (ACPI_FAILURE(status)) { | |
306 | ACPI_REPORT_ERROR(("Could not signal Global Lock semaphore\n")); | |
1da177e4 LT |
307 | } |
308 | } | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /******************************************************************************* |
312 | * | |
313 | * FUNCTION: acpi_ev_global_lock_handler | |
314 | * | |
315 | * PARAMETERS: Context - From thread interface, not used | |
316 | * | |
317 | * RETURN: ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED | |
318 | * | |
319 | * DESCRIPTION: Invoked directly from the SCI handler when a global lock | |
320 | * release interrupt occurs. Grab the global lock and queue | |
321 | * the global lock thread for execution | |
322 | * | |
323 | ******************************************************************************/ | |
324 | ||
4be44fcd | 325 | static u32 acpi_ev_global_lock_handler(void *context) |
1da177e4 | 326 | { |
4be44fcd LB |
327 | u8 acquired = FALSE; |
328 | acpi_status status; | |
1da177e4 LT |
329 | |
330 | /* | |
331 | * Attempt to get the lock | |
332 | * If we don't get it now, it will be marked pending and we will | |
333 | * take another interrupt when it becomes free. | |
334 | */ | |
4be44fcd | 335 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
1da177e4 LT |
336 | if (acquired) { |
337 | /* Got the lock, now wake all threads waiting for it */ | |
338 | ||
339 | acpi_gbl_global_lock_acquired = TRUE; | |
340 | ||
341 | /* Run the Global Lock thread which will signal all waiting threads */ | |
342 | ||
4be44fcd LB |
343 | status = acpi_os_queue_for_execution(OSD_PRIORITY_HIGH, |
344 | acpi_ev_global_lock_thread, | |
345 | context); | |
346 | if (ACPI_FAILURE(status)) { | |
347 | ACPI_REPORT_ERROR(("Could not queue Global Lock thread, %s\n", acpi_format_exception(status))); | |
1da177e4 LT |
348 | |
349 | return (ACPI_INTERRUPT_NOT_HANDLED); | |
350 | } | |
351 | } | |
352 | ||
353 | return (ACPI_INTERRUPT_HANDLED); | |
354 | } | |
355 | ||
1da177e4 LT |
356 | /******************************************************************************* |
357 | * | |
358 | * FUNCTION: acpi_ev_init_global_lock_handler | |
359 | * | |
360 | * PARAMETERS: None | |
361 | * | |
362 | * RETURN: Status | |
363 | * | |
364 | * DESCRIPTION: Install a handler for the global lock release event | |
365 | * | |
366 | ******************************************************************************/ | |
367 | ||
4be44fcd | 368 | acpi_status acpi_ev_init_global_lock_handler(void) |
1da177e4 | 369 | { |
4be44fcd | 370 | acpi_status status; |
1da177e4 | 371 | |
4be44fcd | 372 | ACPI_FUNCTION_TRACE("ev_init_global_lock_handler"); |
1da177e4 LT |
373 | |
374 | acpi_gbl_global_lock_present = TRUE; | |
4be44fcd LB |
375 | status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, |
376 | acpi_ev_global_lock_handler, | |
377 | NULL); | |
1da177e4 LT |
378 | |
379 | /* | |
380 | * If the global lock does not exist on this platform, the attempt | |
381 | * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) | |
382 | * Map to AE_OK, but mark global lock as not present. | |
383 | * Any attempt to actually use the global lock will be flagged | |
384 | * with an error. | |
385 | */ | |
386 | if (status == AE_NO_HARDWARE_RESPONSE) { | |
4be44fcd | 387 | ACPI_REPORT_ERROR(("No response from Global Lock hardware, disabling lock\n")); |
0c9938cc | 388 | |
1da177e4 LT |
389 | acpi_gbl_global_lock_present = FALSE; |
390 | status = AE_OK; | |
391 | } | |
392 | ||
4be44fcd | 393 | return_ACPI_STATUS(status); |
1da177e4 LT |
394 | } |
395 | ||
1da177e4 LT |
396 | /****************************************************************************** |
397 | * | |
398 | * FUNCTION: acpi_ev_acquire_global_lock | |
399 | * | |
400 | * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. | |
401 | * | |
402 | * RETURN: Status | |
403 | * | |
404 | * DESCRIPTION: Attempt to gain ownership of the Global Lock. | |
405 | * | |
406 | *****************************************************************************/ | |
407 | ||
4be44fcd | 408 | acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
1da177e4 | 409 | { |
4be44fcd LB |
410 | acpi_status status = AE_OK; |
411 | u8 acquired = FALSE; | |
1da177e4 | 412 | |
4be44fcd | 413 | ACPI_FUNCTION_TRACE("ev_acquire_global_lock"); |
1da177e4 LT |
414 | |
415 | #ifndef ACPI_APPLICATION | |
416 | /* Make sure that we actually have a global lock */ | |
417 | ||
418 | if (!acpi_gbl_global_lock_present) { | |
4be44fcd | 419 | return_ACPI_STATUS(AE_NO_GLOBAL_LOCK); |
1da177e4 LT |
420 | } |
421 | #endif | |
422 | ||
423 | /* One more thread wants the global lock */ | |
424 | ||
425 | acpi_gbl_global_lock_thread_count++; | |
426 | ||
44f6c012 RM |
427 | /* |
428 | * If we (OS side vs. BIOS side) have the hardware lock already, | |
429 | * we are done | |
430 | */ | |
1da177e4 | 431 | if (acpi_gbl_global_lock_acquired) { |
4be44fcd | 432 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
433 | } |
434 | ||
435 | /* We must acquire the actual hardware lock */ | |
436 | ||
4be44fcd | 437 | ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired); |
1da177e4 | 438 | if (acquired) { |
4be44fcd | 439 | /* We got the lock */ |
1da177e4 | 440 | |
4be44fcd LB |
441 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
442 | "Acquired the HW Global Lock\n")); | |
1da177e4 LT |
443 | |
444 | acpi_gbl_global_lock_acquired = TRUE; | |
4be44fcd | 445 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
446 | } |
447 | ||
448 | /* | |
449 | * Did not get the lock. The pending bit was set above, and we must now | |
450 | * wait until we get the global lock released interrupt. | |
451 | */ | |
4be44fcd | 452 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n")); |
1da177e4 LT |
453 | |
454 | /* | |
455 | * Acquire the global lock semaphore first. | |
456 | * Since this wait will block, we must release the interpreter | |
457 | */ | |
4be44fcd LB |
458 | status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore, |
459 | timeout); | |
460 | return_ACPI_STATUS(status); | |
1da177e4 LT |
461 | } |
462 | ||
1da177e4 LT |
463 | /******************************************************************************* |
464 | * | |
465 | * FUNCTION: acpi_ev_release_global_lock | |
466 | * | |
467 | * PARAMETERS: None | |
468 | * | |
469 | * RETURN: Status | |
470 | * | |
471 | * DESCRIPTION: Releases ownership of the Global Lock. | |
472 | * | |
473 | ******************************************************************************/ | |
474 | ||
4be44fcd | 475 | acpi_status acpi_ev_release_global_lock(void) |
1da177e4 | 476 | { |
4be44fcd LB |
477 | u8 pending = FALSE; |
478 | acpi_status status = AE_OK; | |
1da177e4 | 479 | |
4be44fcd | 480 | ACPI_FUNCTION_TRACE("ev_release_global_lock"); |
1da177e4 LT |
481 | |
482 | if (!acpi_gbl_global_lock_thread_count) { | |
4be44fcd LB |
483 | ACPI_REPORT_WARNING(("Cannot release HW Global Lock, it has not been acquired\n")); |
484 | return_ACPI_STATUS(AE_NOT_ACQUIRED); | |
1da177e4 LT |
485 | } |
486 | ||
487 | /* One fewer thread has the global lock */ | |
488 | ||
489 | acpi_gbl_global_lock_thread_count--; | |
490 | if (acpi_gbl_global_lock_thread_count) { | |
491 | /* There are still some threads holding the lock, cannot release */ | |
492 | ||
4be44fcd | 493 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
494 | } |
495 | ||
496 | /* | |
497 | * No more threads holding lock, we can do the actual hardware | |
498 | * release | |
499 | */ | |
4be44fcd | 500 | ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, pending); |
1da177e4 LT |
501 | acpi_gbl_global_lock_acquired = FALSE; |
502 | ||
503 | /* | |
504 | * If the pending bit was set, we must write GBL_RLS to the control | |
505 | * register | |
506 | */ | |
507 | if (pending) { | |
4be44fcd LB |
508 | status = acpi_set_register(ACPI_BITREG_GLOBAL_LOCK_RELEASE, |
509 | 1, ACPI_MTX_LOCK); | |
1da177e4 LT |
510 | } |
511 | ||
4be44fcd | 512 | return_ACPI_STATUS(status); |
1da177e4 LT |
513 | } |
514 | ||
1da177e4 LT |
515 | /****************************************************************************** |
516 | * | |
517 | * FUNCTION: acpi_ev_terminate | |
518 | * | |
519 | * PARAMETERS: none | |
520 | * | |
521 | * RETURN: none | |
522 | * | |
523 | * DESCRIPTION: Disable events and free memory allocated for table storage. | |
524 | * | |
525 | ******************************************************************************/ | |
526 | ||
4be44fcd | 527 | void acpi_ev_terminate(void) |
1da177e4 | 528 | { |
4be44fcd LB |
529 | acpi_native_uint i; |
530 | acpi_status status; | |
1da177e4 | 531 | |
4be44fcd | 532 | ACPI_FUNCTION_TRACE("ev_terminate"); |
1da177e4 LT |
533 | |
534 | if (acpi_gbl_events_initialized) { | |
535 | /* | |
536 | * Disable all event-related functionality. | |
537 | * In all cases, on error, print a message but obviously we don't abort. | |
538 | */ | |
539 | ||
540 | /* Disable all fixed events */ | |
541 | ||
542 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
4be44fcd LB |
543 | status = acpi_disable_event((u32) i, 0); |
544 | if (ACPI_FAILURE(status)) { | |
4a90c7e8 | 545 | ACPI_REPORT_ERROR(("Could not disable fixed event %d\n", (u32) i)); |
1da177e4 LT |
546 | } |
547 | } | |
548 | ||
549 | /* Disable all GPEs in all GPE blocks */ | |
550 | ||
4be44fcd | 551 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); |
1da177e4 LT |
552 | |
553 | /* Remove SCI handler */ | |
554 | ||
4be44fcd | 555 | status = acpi_ev_remove_sci_handler(); |
1da177e4 | 556 | if (ACPI_FAILURE(status)) { |
4a90c7e8 | 557 | ACPI_REPORT_ERROR(("Could not remove SCI handler\n")); |
1da177e4 LT |
558 | } |
559 | } | |
560 | ||
561 | /* Deallocate all handler objects installed within GPE info structs */ | |
562 | ||
4be44fcd | 563 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers); |
1da177e4 LT |
564 | |
565 | /* Return to original mode if necessary */ | |
566 | ||
567 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
568 | status = acpi_disable(); |
569 | if (ACPI_FAILURE(status)) { | |
4a90c7e8 | 570 | ACPI_REPORT_WARNING(("acpi_disable failed\n")); |
1da177e4 LT |
571 | } |
572 | } | |
573 | return_VOID; | |
574 | } |