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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 | |
4119532c | 52 | /* Names for Notify() values, used for debug output */ |
44f6c012 | 53 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 54 | static const char *acpi_notify_value_names[] = { |
44f6c012 RM |
55 | "Bus Check", |
56 | "Device Check", | |
57 | "Device Wake", | |
4119532c | 58 | "Eject Request", |
44f6c012 RM |
59 | "Device Check Light", |
60 | "Frequency Mismatch", | |
61 | "Bus Mode Mismatch", | |
62 | "Power Fault" | |
63 | }; | |
64 | #endif | |
65 | ||
f3d2e786 BM |
66 | /* Pointer to FACS needed for the Global Lock */ |
67 | ||
68 | static struct acpi_table_facs *facs = NULL; | |
69 | ||
44f6c012 RM |
70 | /* Local prototypes */ |
71 | ||
4be44fcd | 72 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
44f6c012 | 73 | |
4be44fcd | 74 | static u32 acpi_ev_global_lock_handler(void *context); |
44f6c012 | 75 | |
1da177e4 LT |
76 | /******************************************************************************* |
77 | * | |
78 | * FUNCTION: acpi_ev_is_notify_object | |
79 | * | |
80 | * PARAMETERS: Node - Node to check | |
81 | * | |
82 | * RETURN: TRUE if notifies allowed on this object | |
83 | * | |
84 | * DESCRIPTION: Check type of node for a object that supports notifies. | |
85 | * | |
86 | * TBD: This could be replaced by a flag bit in the node. | |
87 | * | |
88 | ******************************************************************************/ | |
89 | ||
4be44fcd | 90 | u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
1da177e4 LT |
91 | { |
92 | switch (node->type) { | |
93 | case ACPI_TYPE_DEVICE: | |
94 | case ACPI_TYPE_PROCESSOR: | |
95 | case ACPI_TYPE_POWER: | |
96 | case ACPI_TYPE_THERMAL: | |
97 | /* | |
98 | * These are the ONLY objects that can receive ACPI notifications | |
99 | */ | |
100 | return (TRUE); | |
101 | ||
102 | default: | |
103 | return (FALSE); | |
104 | } | |
105 | } | |
106 | ||
1da177e4 LT |
107 | /******************************************************************************* |
108 | * | |
109 | * FUNCTION: acpi_ev_queue_notify_request | |
110 | * | |
111 | * PARAMETERS: Node - NS node for the notified object | |
112 | * notify_value - Value from the Notify() request | |
113 | * | |
114 | * RETURN: Status | |
115 | * | |
116 | * DESCRIPTION: Dispatch a device notification event to a previously | |
117 | * installed handler. | |
118 | * | |
119 | ******************************************************************************/ | |
120 | ||
1da177e4 | 121 | acpi_status |
4be44fcd LB |
122 | acpi_ev_queue_notify_request(struct acpi_namespace_node * node, |
123 | u32 notify_value) | |
1da177e4 | 124 | { |
4be44fcd LB |
125 | union acpi_operand_object *obj_desc; |
126 | union acpi_operand_object *handler_obj = NULL; | |
127 | union acpi_generic_state *notify_info; | |
128 | acpi_status status = AE_OK; | |
1da177e4 | 129 | |
b229cf92 | 130 | ACPI_FUNCTION_NAME(ev_queue_notify_request); |
1da177e4 LT |
131 | |
132 | /* | |
133 | * For value 3 (Ejection Request), some device method may need to be run. | |
44f6c012 RM |
134 | * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need |
135 | * to be run. | |
1da177e4 | 136 | * For value 0x80 (Status Change) on the power button or sleep button, |
44f6c012 | 137 | * initiate soft-off or sleep operation? |
1da177e4 | 138 | */ |
4be44fcd LB |
139 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
140 | "Dispatching Notify(%X) on node %p\n", notify_value, | |
141 | node)); | |
1da177e4 LT |
142 | |
143 | if (notify_value <= 7) { | |
4be44fcd LB |
144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notify value: %s\n", |
145 | acpi_notify_value_names[notify_value])); | |
146 | } else { | |
147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
148 | "Notify value: 0x%2.2X **Device Specific**\n", | |
149 | notify_value)); | |
1da177e4 LT |
150 | } |
151 | ||
152 | /* Get the notify object attached to the NS Node */ | |
153 | ||
4be44fcd | 154 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 155 | if (obj_desc) { |
52fc0b02 | 156 | |
1da177e4 LT |
157 | /* We have the notify object, Get the right handler */ |
158 | ||
159 | switch (node->type) { | |
160 | case ACPI_TYPE_DEVICE: | |
161 | case ACPI_TYPE_THERMAL: | |
162 | case ACPI_TYPE_PROCESSOR: | |
163 | case ACPI_TYPE_POWER: | |
164 | ||
165 | if (notify_value <= ACPI_MAX_SYS_NOTIFY) { | |
4be44fcd LB |
166 | handler_obj = |
167 | obj_desc->common_notify.system_notify; | |
168 | } else { | |
169 | handler_obj = | |
170 | obj_desc->common_notify.device_notify; | |
1da177e4 LT |
171 | } |
172 | break; | |
173 | ||
174 | default: | |
175 | /* All other types are not supported */ | |
176 | return (AE_TYPE); | |
177 | } | |
178 | } | |
179 | ||
180 | /* If there is any handler to run, schedule the dispatcher */ | |
181 | ||
4be44fcd LB |
182 | if ((acpi_gbl_system_notify.handler |
183 | && (notify_value <= ACPI_MAX_SYS_NOTIFY)) | |
184 | || (acpi_gbl_device_notify.handler | |
185 | && (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) { | |
186 | notify_info = acpi_ut_create_generic_state(); | |
1da177e4 LT |
187 | if (!notify_info) { |
188 | return (AE_NO_MEMORY); | |
189 | } | |
190 | ||
61686124 BM |
191 | notify_info->common.descriptor_type = |
192 | ACPI_DESC_TYPE_STATE_NOTIFY; | |
4be44fcd LB |
193 | notify_info->notify.node = node; |
194 | notify_info->notify.value = (u16) notify_value; | |
1da177e4 LT |
195 | notify_info->notify.handler_obj = handler_obj; |
196 | ||
4119532c BM |
197 | status = |
198 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, | |
199 | notify_info); | |
4be44fcd LB |
200 | if (ACPI_FAILURE(status)) { |
201 | acpi_ut_delete_generic_state(notify_info); | |
1da177e4 LT |
202 | } |
203 | } | |
204 | ||
205 | if (!handler_obj) { | |
206 | /* | |
207 | * There is no per-device notify handler for this device. | |
208 | * This may or may not be a problem. | |
209 | */ | |
4be44fcd LB |
210 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
211 | "No notify handler for Notify(%4.4s, %X) node %p\n", | |
212 | acpi_ut_get_node_name(node), notify_value, | |
213 | node)); | |
1da177e4 LT |
214 | } |
215 | ||
216 | return (status); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | /******************************************************************************* |
220 | * | |
221 | * FUNCTION: acpi_ev_notify_dispatch | |
222 | * | |
44f6c012 | 223 | * PARAMETERS: Context - To be passed to the notify handler |
1da177e4 LT |
224 | * |
225 | * RETURN: None. | |
226 | * | |
227 | * DESCRIPTION: Dispatch a device notification event to a previously | |
228 | * installed handler. | |
229 | * | |
230 | ******************************************************************************/ | |
231 | ||
4be44fcd | 232 | static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
1da177e4 | 233 | { |
4be44fcd LB |
234 | union acpi_generic_state *notify_info = |
235 | (union acpi_generic_state *)context; | |
236 | acpi_notify_handler global_handler = NULL; | |
237 | void *global_context = NULL; | |
238 | union acpi_operand_object *handler_obj; | |
1da177e4 | 239 | |
4be44fcd | 240 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
241 | |
242 | /* | |
243 | * We will invoke a global notify handler if installed. | |
44f6c012 RM |
244 | * This is done _before_ we invoke the per-device handler attached |
245 | * to the device. | |
1da177e4 LT |
246 | */ |
247 | if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) { | |
52fc0b02 | 248 | |
1da177e4 LT |
249 | /* Global system notification handler */ |
250 | ||
251 | if (acpi_gbl_system_notify.handler) { | |
252 | global_handler = acpi_gbl_system_notify.handler; | |
253 | global_context = acpi_gbl_system_notify.context; | |
254 | } | |
4be44fcd | 255 | } else { |
1da177e4 LT |
256 | /* Global driver notification handler */ |
257 | ||
258 | if (acpi_gbl_device_notify.handler) { | |
259 | global_handler = acpi_gbl_device_notify.handler; | |
260 | global_context = acpi_gbl_device_notify.context; | |
261 | } | |
262 | } | |
263 | ||
264 | /* Invoke the system handler first, if present */ | |
265 | ||
266 | if (global_handler) { | |
4be44fcd LB |
267 | global_handler(notify_info->notify.node, |
268 | notify_info->notify.value, global_context); | |
1da177e4 LT |
269 | } |
270 | ||
271 | /* Now invoke the per-device handler, if present */ | |
272 | ||
273 | handler_obj = notify_info->notify.handler_obj; | |
274 | if (handler_obj) { | |
4be44fcd LB |
275 | handler_obj->notify.handler(notify_info->notify.node, |
276 | notify_info->notify.value, | |
277 | handler_obj->notify.context); | |
1da177e4 LT |
278 | } |
279 | ||
280 | /* All done with the info object */ | |
281 | ||
4be44fcd | 282 | acpi_ut_delete_generic_state(notify_info); |
1da177e4 LT |
283 | } |
284 | ||
1da177e4 LT |
285 | /******************************************************************************* |
286 | * | |
287 | * FUNCTION: acpi_ev_global_lock_handler | |
288 | * | |
289 | * PARAMETERS: Context - From thread interface, not used | |
290 | * | |
a72d4756 | 291 | * RETURN: ACPI_INTERRUPT_HANDLED |
1da177e4 LT |
292 | * |
293 | * DESCRIPTION: Invoked directly from the SCI handler when a global lock | |
a72d4756 BM |
294 | * release interrupt occurs. Attempt to acquire the global lock, |
295 | * if successful, signal the thread waiting for the lock. | |
296 | * | |
297 | * NOTE: Assumes that the semaphore can be signaled from interrupt level. If | |
298 | * this is not possible for some reason, a separate thread will have to be | |
299 | * scheduled to do this. | |
1da177e4 LT |
300 | * |
301 | ******************************************************************************/ | |
302 | ||
4be44fcd | 303 | static u32 acpi_ev_global_lock_handler(void *context) |
1da177e4 | 304 | { |
4be44fcd | 305 | u8 acquired = FALSE; |
1da177e4 LT |
306 | |
307 | /* | |
c81da666 BM |
308 | * Attempt to get the lock. |
309 | * | |
1da177e4 LT |
310 | * If we don't get it now, it will be marked pending and we will |
311 | * take another interrupt when it becomes free. | |
312 | */ | |
f3d2e786 | 313 | ACPI_ACQUIRE_GLOBAL_LOCK(facs, acquired); |
1da177e4 | 314 | if (acquired) { |
52fc0b02 | 315 | |
1da177e4 | 316 | /* Got the lock, now wake all threads waiting for it */ |
c81da666 | 317 | |
1da177e4 | 318 | acpi_gbl_global_lock_acquired = TRUE; |
a72d4756 BM |
319 | /* Send a unit to the semaphore */ |
320 | ||
321 | if (ACPI_FAILURE(acpi_os_signal_semaphore( | |
322 | acpi_gbl_global_lock_semaphore, 1))) { | |
323 | ACPI_ERROR((AE_INFO, | |
324 | "Could not signal Global Lock semaphore")); | |
325 | } | |
1da177e4 LT |
326 | } |
327 | ||
328 | return (ACPI_INTERRUPT_HANDLED); | |
329 | } | |
330 | ||
1da177e4 LT |
331 | /******************************************************************************* |
332 | * | |
333 | * FUNCTION: acpi_ev_init_global_lock_handler | |
334 | * | |
335 | * PARAMETERS: None | |
336 | * | |
337 | * RETURN: Status | |
338 | * | |
339 | * DESCRIPTION: Install a handler for the global lock release event | |
340 | * | |
341 | ******************************************************************************/ | |
342 | ||
4be44fcd | 343 | acpi_status acpi_ev_init_global_lock_handler(void) |
1da177e4 | 344 | { |
4be44fcd | 345 | acpi_status status; |
1da177e4 | 346 | |
b229cf92 | 347 | ACPI_FUNCTION_TRACE(ev_init_global_lock_handler); |
1da177e4 | 348 | |
f3d2e786 BM |
349 | status = |
350 | acpi_get_table(ACPI_SIG_FACS, 0, | |
351 | (struct acpi_table_header **)&facs); | |
352 | if (ACPI_FAILURE(status)) { | |
353 | return_ACPI_STATUS(status); | |
354 | } | |
355 | ||
1da177e4 | 356 | acpi_gbl_global_lock_present = TRUE; |
4be44fcd LB |
357 | status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, |
358 | acpi_ev_global_lock_handler, | |
359 | NULL); | |
1da177e4 LT |
360 | |
361 | /* | |
362 | * If the global lock does not exist on this platform, the attempt | |
363 | * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick) | |
364 | * Map to AE_OK, but mark global lock as not present. | |
365 | * Any attempt to actually use the global lock will be flagged | |
366 | * with an error. | |
367 | */ | |
368 | if (status == AE_NO_HARDWARE_RESPONSE) { | |
b8e4d893 BM |
369 | ACPI_ERROR((AE_INFO, |
370 | "No response from Global Lock hardware, disabling lock")); | |
0c9938cc | 371 | |
1da177e4 LT |
372 | acpi_gbl_global_lock_present = FALSE; |
373 | status = AE_OK; | |
374 | } | |
375 | ||
4be44fcd | 376 | return_ACPI_STATUS(status); |
1da177e4 LT |
377 | } |
378 | ||
1da177e4 LT |
379 | /****************************************************************************** |
380 | * | |
381 | * FUNCTION: acpi_ev_acquire_global_lock | |
382 | * | |
383 | * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. | |
384 | * | |
385 | * RETURN: Status | |
386 | * | |
387 | * DESCRIPTION: Attempt to gain ownership of the Global Lock. | |
388 | * | |
c81da666 BM |
389 | * MUTEX: Interpreter must be locked |
390 | * | |
391 | * Note: The original implementation allowed multiple threads to "acquire" the | |
392 | * Global Lock, and the OS would hold the lock until the last thread had | |
393 | * released it. However, this could potentially starve the BIOS out of the | |
394 | * lock, especially in the case where there is a tight handshake between the | |
395 | * Embedded Controller driver and the BIOS. Therefore, this implementation | |
396 | * allows only one thread to acquire the HW Global Lock at a time, and makes | |
397 | * the global lock appear as a standard mutex on the OS side. | |
398 | * | |
1da177e4 LT |
399 | *****************************************************************************/ |
400 | ||
4be44fcd | 401 | acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
1da177e4 | 402 | { |
4be44fcd LB |
403 | acpi_status status = AE_OK; |
404 | u8 acquired = FALSE; | |
1da177e4 | 405 | |
b229cf92 | 406 | ACPI_FUNCTION_TRACE(ev_acquire_global_lock); |
1da177e4 | 407 | |
c81da666 BM |
408 | /* |
409 | * Only one thread can acquire the GL at a time, the global_lock_mutex | |
410 | * enforces this. This interface releases the interpreter if we must wait. | |
411 | */ | |
412 | status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, timeout); | |
413 | if (ACPI_FAILURE(status)) { | |
414 | return_ACPI_STATUS(status); | |
1da177e4 | 415 | } |
1da177e4 | 416 | |
44f6c012 | 417 | /* |
c81da666 BM |
418 | * Make sure that a global lock actually exists. If not, just treat |
419 | * the lock as a standard mutex. | |
44f6c012 | 420 | */ |
c81da666 BM |
421 | if (!acpi_gbl_global_lock_present) { |
422 | acpi_gbl_global_lock_acquired = TRUE; | |
4be44fcd | 423 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
424 | } |
425 | ||
c81da666 | 426 | /* Attempt to acquire the actual hardware lock */ |
1da177e4 | 427 | |
f3d2e786 | 428 | ACPI_ACQUIRE_GLOBAL_LOCK(facs, acquired); |
1da177e4 | 429 | if (acquired) { |
52fc0b02 | 430 | |
4be44fcd | 431 | /* We got the lock */ |
1da177e4 | 432 | |
4be44fcd | 433 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
c81da666 | 434 | "Acquired hardware Global Lock\n")); |
1da177e4 LT |
435 | |
436 | acpi_gbl_global_lock_acquired = TRUE; | |
4be44fcd | 437 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
438 | } |
439 | ||
440 | /* | |
c81da666 | 441 | * Did not get the lock. The pending bit was set above, and we must now |
1da177e4 LT |
442 | * wait until we get the global lock released interrupt. |
443 | */ | |
c81da666 | 444 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for hardware Global Lock\n")); |
1da177e4 LT |
445 | |
446 | /* | |
c81da666 BM |
447 | * Wait for handshake with the global lock interrupt handler. |
448 | * This interface releases the interpreter if we must wait. | |
1da177e4 | 449 | */ |
c81da666 BM |
450 | status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore, |
451 | ACPI_WAIT_FOREVER); | |
f3d2e786 | 452 | |
4be44fcd | 453 | return_ACPI_STATUS(status); |
1da177e4 LT |
454 | } |
455 | ||
1da177e4 LT |
456 | /******************************************************************************* |
457 | * | |
458 | * FUNCTION: acpi_ev_release_global_lock | |
459 | * | |
460 | * PARAMETERS: None | |
461 | * | |
462 | * RETURN: Status | |
463 | * | |
464 | * DESCRIPTION: Releases ownership of the Global Lock. | |
465 | * | |
466 | ******************************************************************************/ | |
467 | ||
4be44fcd | 468 | acpi_status acpi_ev_release_global_lock(void) |
1da177e4 | 469 | { |
4be44fcd LB |
470 | u8 pending = FALSE; |
471 | acpi_status status = AE_OK; | |
1da177e4 | 472 | |
b229cf92 | 473 | ACPI_FUNCTION_TRACE(ev_release_global_lock); |
1da177e4 | 474 | |
a72d4756 | 475 | /* Lock must be already acquired */ |
c81da666 BM |
476 | |
477 | if (!acpi_gbl_global_lock_acquired) { | |
b8e4d893 | 478 | ACPI_WARNING((AE_INFO, |
c81da666 | 479 | "Cannot release the ACPI Global Lock, it has not been acquired")); |
4be44fcd | 480 | return_ACPI_STATUS(AE_NOT_ACQUIRED); |
1da177e4 LT |
481 | } |
482 | ||
c81da666 | 483 | if (acpi_gbl_global_lock_present) { |
1da177e4 | 484 | |
c81da666 | 485 | /* Allow any thread to release the lock */ |
52fc0b02 | 486 | |
f3d2e786 | 487 | ACPI_RELEASE_GLOBAL_LOCK(facs, pending); |
1da177e4 | 488 | |
c81da666 BM |
489 | /* |
490 | * If the pending bit was set, we must write GBL_RLS to the control | |
491 | * register | |
492 | */ | |
493 | if (pending) { | |
494 | status = | |
495 | acpi_set_register(ACPI_BITREG_GLOBAL_LOCK_RELEASE, | |
496 | 1, ACPI_MTX_LOCK); | |
497 | } | |
498 | ||
499 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
500 | "Released hardware Global Lock\n")); | |
1da177e4 LT |
501 | } |
502 | ||
1da177e4 LT |
503 | acpi_gbl_global_lock_acquired = FALSE; |
504 | ||
c81da666 | 505 | /* Release the local GL mutex */ |
1da177e4 | 506 | |
c81da666 | 507 | acpi_os_release_mutex(acpi_gbl_global_lock_mutex); |
4be44fcd | 508 | return_ACPI_STATUS(status); |
1da177e4 LT |
509 | } |
510 | ||
1da177e4 LT |
511 | /****************************************************************************** |
512 | * | |
513 | * FUNCTION: acpi_ev_terminate | |
514 | * | |
515 | * PARAMETERS: none | |
516 | * | |
517 | * RETURN: none | |
518 | * | |
519 | * DESCRIPTION: Disable events and free memory allocated for table storage. | |
520 | * | |
521 | ******************************************************************************/ | |
522 | ||
4be44fcd | 523 | void acpi_ev_terminate(void) |
1da177e4 | 524 | { |
4be44fcd LB |
525 | acpi_native_uint i; |
526 | acpi_status status; | |
1da177e4 | 527 | |
b229cf92 | 528 | ACPI_FUNCTION_TRACE(ev_terminate); |
1da177e4 LT |
529 | |
530 | if (acpi_gbl_events_initialized) { | |
531 | /* | |
532 | * Disable all event-related functionality. | |
533 | * In all cases, on error, print a message but obviously we don't abort. | |
534 | */ | |
535 | ||
536 | /* Disable all fixed events */ | |
537 | ||
538 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { | |
4be44fcd LB |
539 | status = acpi_disable_event((u32) i, 0); |
540 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
541 | ACPI_ERROR((AE_INFO, |
542 | "Could not disable fixed event %d", | |
543 | (u32) i)); | |
1da177e4 LT |
544 | } |
545 | } | |
546 | ||
547 | /* Disable all GPEs in all GPE blocks */ | |
548 | ||
4be44fcd | 549 | status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block); |
1da177e4 LT |
550 | |
551 | /* Remove SCI handler */ | |
552 | ||
4be44fcd | 553 | status = acpi_ev_remove_sci_handler(); |
1da177e4 | 554 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 555 | ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); |
1da177e4 LT |
556 | } |
557 | } | |
558 | ||
559 | /* Deallocate all handler objects installed within GPE info structs */ | |
560 | ||
4be44fcd | 561 | status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers); |
1da177e4 LT |
562 | |
563 | /* Return to original mode if necessary */ | |
564 | ||
565 | if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { | |
4be44fcd LB |
566 | status = acpi_disable(); |
567 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 568 | ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
1da177e4 LT |
569 | } |
570 | } | |
571 | return_VOID; | |
572 | } |