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23c98c94 | 1 | /** @file\r |
504214c4 LG |
2 | UEFI Event support functions implemented in this file.\r |
3 | \r | |
23c98c94 | 4 | Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r |
28a00297 | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
504214c4 | 13 | **/\r |
28a00297 | 14 | \r |
15 | \r | |
16 | #include <DxeMain.h>\r | |
17 | \r | |
18 | //\r | |
19 | // Enumerate the valid types\r | |
20 | //\r | |
21 | UINT32 mEventTable[] = {\r | |
22 | //\r | |
23 | // 0x80000200 Timer event with a notification function that is\r | |
24 | // queue when the event is signaled with SignalEvent()\r | |
25 | //\r | |
26 | EVT_TIMER | EVT_NOTIFY_SIGNAL,\r | |
27 | //\r | |
28 | // 0x80000000 Timer event without a notification function. It can be\r | |
29 | // signaled with SignalEvent() and checked with CheckEvent() or WaitForEvent().\r | |
30 | //\r | |
31 | EVT_TIMER,\r | |
32 | //\r | |
33 | // 0x00000100 Generic event with a notification function that\r | |
34 | // can be waited on with CheckEvent() or WaitForEvent()\r | |
35 | //\r | |
36 | EVT_NOTIFY_WAIT,\r | |
37 | //\r | |
38 | // 0x00000200 Generic event with a notification function that\r | |
39 | // is queue when the event is signaled with SignalEvent()\r | |
40 | //\r | |
41 | EVT_NOTIFY_SIGNAL,\r | |
42 | //\r | |
43 | // 0x00000201 ExitBootServicesEvent.\r | |
44 | //\r | |
45 | EVT_SIGNAL_EXIT_BOOT_SERVICES,\r | |
46 | //\r | |
47 | // 0x60000202 SetVirtualAddressMapEvent.\r | |
48 | //\r | |
49 | EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r | |
50 | \r | |
51 | //\r | |
52 | // 0x00000000 Generic event without a notification function.\r | |
53 | // It can be signaled with SignalEvent() and checked with CheckEvent()\r | |
54 | // or WaitForEvent().\r | |
55 | //\r | |
56 | 0x00000000,\r | |
57 | //\r | |
58 | // 0x80000100 Timer event with a notification function that can be\r | |
59 | // waited on with CheckEvent() or WaitForEvent()\r | |
60 | //\r | |
61 | EVT_TIMER | EVT_NOTIFY_WAIT,\r | |
62 | };\r | |
63 | \r | |
162ed594 | 64 | \r |
65 | /**\r | |
66 | Enter critical section by acquiring the lock on gEventQueueLock.\r | |
67 | \r | |
68 | **/\r | |
28a00297 | 69 | VOID\r |
70 | CoreAcquireEventLock (\r | |
71 | VOID\r | |
72 | )\r | |
28a00297 | 73 | {\r |
74 | CoreAcquireLock (&gEventQueueLock);\r | |
75 | }\r | |
76 | \r | |
162ed594 | 77 | \r |
78 | /**\r | |
79 | Exit critical section by releasing the lock on gEventQueueLock.\r | |
80 | \r | |
81 | **/\r | |
28a00297 | 82 | VOID\r |
83 | CoreReleaseEventLock (\r | |
84 | VOID\r | |
85 | )\r | |
28a00297 | 86 | {\r |
87 | CoreReleaseLock (&gEventQueueLock);\r | |
88 | }\r | |
89 | \r | |
90 | \r | |
28a00297 | 91 | \r |
162ed594 | 92 | /**\r |
28a00297 | 93 | Initializes "event" support and populates parts of the System and Runtime Table.\r |
94 | \r | |
162ed594 | 95 | @retval EFI_SUCCESS Always return success\r |
28a00297 | 96 | \r |
162ed594 | 97 | **/\r |
98 | EFI_STATUS\r | |
99 | CoreInitializeEventServices (\r | |
100 | VOID\r | |
101 | )\r | |
28a00297 | 102 | {\r |
103 | UINTN Index;\r | |
104 | \r | |
105 | for (Index=0; Index <= TPL_HIGH_LEVEL; Index++) {\r | |
106 | InitializeListHead (&gEventQueue[Index]);\r | |
107 | }\r | |
108 | \r | |
109 | CoreInitializeTimer ();\r | |
110 | \r | |
111 | return EFI_SUCCESS;\r | |
112 | }\r | |
113 | \r | |
114 | \r | |
28a00297 | 115 | \r |
162ed594 | 116 | /**\r |
28a00297 | 117 | Dispatches all pending events.\r |
118 | \r | |
022c6d45 | 119 | @param Priority The task priority level of event notifications\r |
162ed594 | 120 | to dispatch\r |
28a00297 | 121 | \r |
162ed594 | 122 | **/\r |
123 | VOID\r | |
124 | CoreDispatchEventNotifies (\r | |
125 | IN EFI_TPL Priority\r | |
126 | )\r | |
28a00297 | 127 | {\r |
128 | IEVENT *Event;\r | |
129 | LIST_ENTRY *Head;\r | |
130 | \r | |
131 | CoreAcquireEventLock ();\r | |
132 | ASSERT (gEventQueueLock.OwnerTpl == Priority);\r | |
133 | Head = &gEventQueue[Priority];\r | |
134 | \r | |
135 | //\r | |
136 | // Dispatch all the pending notifications\r | |
137 | //\r | |
138 | while (!IsListEmpty (Head)) {\r | |
139 | \r | |
140 | Event = CR (Head->ForwardLink, IEVENT, NotifyLink, EVENT_SIGNATURE);\r | |
141 | RemoveEntryList (&Event->NotifyLink);\r | |
142 | \r | |
143 | Event->NotifyLink.ForwardLink = NULL;\r | |
144 | \r | |
145 | //\r | |
146 | // Only clear the SIGNAL status if it is a SIGNAL type event.\r | |
147 | // WAIT type events are only cleared in CheckEvent()\r | |
148 | //\r | |
149 | if (Event->Type & EVT_NOTIFY_SIGNAL) {\r | |
150 | Event->SignalCount = 0;\r | |
151 | }\r | |
152 | \r | |
153 | CoreReleaseEventLock ();\r | |
154 | \r | |
155 | //\r | |
156 | // Notify this event\r | |
157 | //\r | |
158 | ASSERT (Event->NotifyFunction != NULL);\r | |
159 | Event->NotifyFunction (Event, Event->NotifyContext);\r | |
160 | \r | |
161 | //\r | |
162 | // Check for next pending event\r | |
163 | //\r | |
164 | CoreAcquireEventLock ();\r | |
165 | }\r | |
166 | \r | |
167 | gEventPending &= ~(1 << Priority);\r | |
168 | CoreReleaseEventLock ();\r | |
169 | }\r | |
170 | \r | |
171 | \r | |
162ed594 | 172 | \r |
173 | /**\r | |
174 | Queues the event's notification function to fire.\r | |
175 | \r | |
176 | @param Event The Event to notify\r | |
177 | \r | |
178 | **/\r | |
28a00297 | 179 | VOID\r |
180 | CoreNotifyEvent (\r | |
181 | IN IEVENT *Event\r | |
182 | )\r | |
28a00297 | 183 | {\r |
184 | \r | |
185 | //\r | |
186 | // Event database must be locked\r | |
187 | //\r | |
188 | ASSERT_LOCKED (&gEventQueueLock);\r | |
189 | \r | |
190 | //\r | |
191 | // If the event is queued somewhere, remove it\r | |
192 | //\r | |
193 | \r | |
194 | if (Event->NotifyLink.ForwardLink != NULL) {\r | |
195 | RemoveEntryList (&Event->NotifyLink);\r | |
196 | Event->NotifyLink.ForwardLink = NULL;\r | |
197 | }\r | |
198 | \r | |
199 | //\r | |
200 | // Queue the event to the pending notification list\r | |
201 | //\r | |
202 | \r | |
203 | InsertTailList (&gEventQueue[Event->NotifyTpl], &Event->NotifyLink);\r | |
204 | gEventPending |= (UINTN)(1 << Event->NotifyTpl);\r | |
205 | }\r | |
206 | \r | |
207 | \r | |
208 | \r | |
162ed594 | 209 | \r |
210 | /**\r | |
211 | Signals all events in the EventGroup.\r | |
212 | \r | |
213 | @param EventGroup The list to signal\r | |
214 | \r | |
215 | **/\r | |
28a00297 | 216 | VOID\r |
217 | CoreNotifySignalList (\r | |
218 | IN EFI_GUID *EventGroup\r | |
219 | )\r | |
28a00297 | 220 | {\r |
221 | LIST_ENTRY *Link;\r | |
222 | LIST_ENTRY *Head;\r | |
223 | IEVENT *Event;\r | |
224 | \r | |
225 | CoreAcquireEventLock ();\r | |
226 | \r | |
227 | Head = &gEventSignalQueue;\r | |
228 | for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {\r | |
229 | Event = CR (Link, IEVENT, SignalLink, EVENT_SIGNATURE);\r | |
230 | if (CompareGuid (&Event->EventGroup, EventGroup)) {\r | |
231 | CoreNotifyEvent (Event);\r | |
232 | }\r | |
233 | }\r | |
234 | \r | |
235 | CoreReleaseEventLock ();\r | |
236 | }\r | |
237 | \r | |
162ed594 | 238 | \r |
239 | /**\r | |
240 | Creates a general-purpose event structure.\r | |
241 | \r | |
022c6d45 | 242 | @param Type The type of event to create and its mode and\r |
243 | attributes\r | |
244 | @param NotifyTpl The task priority level of event notifications\r | |
245 | @param NotifyFunction Pointer to the events notification function\r | |
246 | @param NotifyContext Pointer to the notification functions context;\r | |
247 | corresponds to parameter "Context" in the\r | |
248 | notification function\r | |
249 | @param Event Pointer to the newly created event if the call\r | |
250 | succeeds; undefined otherwise\r | |
251 | \r | |
252 | @retval EFI_SUCCESS The event structure was created\r | |
253 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value\r | |
162ed594 | 254 | @retval EFI_OUT_OF_RESOURCES The event could not be allocated\r |
255 | \r | |
256 | **/\r | |
28a00297 | 257 | EFI_STATUS\r |
258 | EFIAPI\r | |
259 | CoreCreateEvent (\r | |
260 | IN UINT32 Type,\r | |
261 | IN EFI_TPL NotifyTpl,\r | |
262 | IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL\r | |
263 | IN VOID *NotifyContext, OPTIONAL\r | |
264 | OUT EFI_EVENT *Event\r | |
265 | )\r | |
28a00297 | 266 | {\r |
bb8ffffd | 267 | return CoreCreateEventEx (Type, NotifyTpl, NotifyFunction, NotifyContext, NULL, Event);\r |
28a00297 | 268 | }\r |
269 | \r | |
270 | \r | |
162ed594 | 271 | \r |
272 | /**\r | |
273 | Creates a general-purpose event structure\r | |
274 | \r | |
022c6d45 | 275 | @param Type The type of event to create and its mode and\r |
276 | attributes\r | |
277 | @param NotifyTpl The task priority level of event notifications\r | |
278 | @param NotifyFunction Pointer to the events notification function\r | |
279 | @param NotifyContext Pointer to the notification functions context;\r | |
280 | corresponds to parameter "Context" in the\r | |
281 | notification function\r | |
282 | @param EventGroup GUID for EventGroup if NULL act the same as\r | |
283 | gBS->CreateEvent().\r | |
284 | @param Event Pointer to the newly created event if the call\r | |
285 | succeeds; undefined otherwise\r | |
286 | \r | |
287 | @retval EFI_SUCCESS The event structure was created\r | |
288 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value\r | |
162ed594 | 289 | @retval EFI_OUT_OF_RESOURCES The event could not be allocated\r |
290 | \r | |
291 | **/\r | |
28a00297 | 292 | EFI_STATUS\r |
293 | EFIAPI\r | |
294 | CoreCreateEventEx (\r | |
295 | IN UINT32 Type,\r | |
296 | IN EFI_TPL NotifyTpl,\r | |
297 | IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL\r | |
298 | IN CONST VOID *NotifyContext, OPTIONAL\r | |
299 | IN CONST EFI_GUID *EventGroup, OPTIONAL\r | |
300 | OUT EFI_EVENT *Event\r | |
301 | )\r | |
28a00297 | 302 | {\r |
303 | EFI_STATUS Status;\r | |
304 | IEVENT *IEvent;\r | |
305 | INTN Index;\r | |
306 | \r | |
307 | \r | |
51b02d81 | 308 | if (Event == NULL) {\r |
28a00297 | 309 | return EFI_INVALID_PARAMETER;\r |
310 | }\r | |
311 | \r | |
312 | //\r | |
313 | // Check to make sure no reserved flags are set\r | |
314 | //\r | |
315 | Status = EFI_INVALID_PARAMETER;\r | |
316 | for (Index = 0; Index < (sizeof (mEventTable) / sizeof (UINT32)); Index++) {\r | |
317 | if (Type == mEventTable[Index]) {\r | |
318 | Status = EFI_SUCCESS;\r | |
319 | break;\r | |
320 | }\r | |
321 | }\r | |
322 | if(EFI_ERROR (Status)) {\r | |
323 | return EFI_INVALID_PARAMETER;\r | |
324 | }\r | |
325 | \r | |
bb8ffffd | 326 | //\r |
327 | // Convert Event type for pre-defined Event groups\r | |
328 | //\r | |
329 | if (EventGroup != NULL) {\r | |
330 | //\r | |
331 | // For event group, type EVT_SIGNAL_EXIT_BOOT_SERVICES and EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE\r | |
332 | // are not valid\r | |
333 | //\r | |
334 | if ((Type == EVT_SIGNAL_EXIT_BOOT_SERVICES) || (Type == EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE)) {\r | |
335 | return EFI_INVALID_PARAMETER;\r | |
336 | }\r | |
337 | if (CompareGuid (EventGroup, &gEfiEventExitBootServicesGuid)) {\r | |
338 | Type = EVT_SIGNAL_EXIT_BOOT_SERVICES;\r | |
339 | } else if (CompareGuid (EventGroup, &gEfiEventVirtualAddressChangeGuid)) {\r | |
340 | Type = EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE;\r | |
341 | }\r | |
342 | } else {\r | |
343 | //\r | |
344 | // Convert EFI 1.10 Events to their UEFI 2.0 CreateEventEx mapping\r | |
345 | //\r | |
346 | if (Type == EVT_SIGNAL_EXIT_BOOT_SERVICES) {\r | |
347 | EventGroup = &gEfiEventExitBootServicesGuid;\r | |
348 | } else if (Type == EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE) {\r | |
349 | EventGroup = &gEfiEventVirtualAddressChangeGuid;\r | |
350 | }\r | |
351 | }\r | |
352 | \r | |
28a00297 | 353 | //\r |
354 | // If it's a notify type of event, check its parameters\r | |
355 | //\r | |
71f68914 | 356 | if ((Type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL)) != 0) {\r |
28a00297 | 357 | //\r |
358 | // Check for an invalid NotifyFunction or NotifyTpl\r | |
359 | //\r | |
360 | if ((NotifyFunction == NULL) ||\r | |
51b02d81 | 361 | (NotifyTpl <= TPL_APPLICATION) ||\r |
28a00297 | 362 | (NotifyTpl >= TPL_HIGH_LEVEL)) {\r |
363 | return EFI_INVALID_PARAMETER;\r | |
364 | }\r | |
365 | \r | |
366 | } else {\r | |
367 | //\r | |
368 | // No notification needed, zero ignored values\r | |
369 | //\r | |
370 | NotifyTpl = 0;\r | |
371 | NotifyFunction = NULL;\r | |
372 | NotifyContext = NULL;\r | |
373 | }\r | |
374 | \r | |
375 | //\r | |
376 | // Allcoate and initialize a new event structure.\r | |
377 | //\r | |
378 | Status = CoreAllocatePool (\r | |
71f68914 | 379 | ((Type & EVT_RUNTIME) != 0) ? EfiRuntimeServicesData: EfiBootServicesData,\r |
28a00297 | 380 | sizeof (IEVENT),\r |
381 | (VOID **)&IEvent\r | |
382 | );\r | |
383 | if (EFI_ERROR (Status)) {\r | |
384 | return EFI_OUT_OF_RESOURCES;\r | |
385 | }\r | |
386 | \r | |
e94a9ff7 | 387 | ZeroMem (IEvent, sizeof (IEVENT));\r |
28a00297 | 388 | \r |
389 | IEvent->Signature = EVENT_SIGNATURE;\r | |
390 | IEvent->Type = Type;\r | |
391 | \r | |
392 | IEvent->NotifyTpl = NotifyTpl;\r | |
393 | IEvent->NotifyFunction = NotifyFunction;\r | |
394 | IEvent->NotifyContext = (VOID *)NotifyContext;\r | |
395 | if (EventGroup != NULL) {\r | |
396 | CopyGuid (&IEvent->EventGroup, EventGroup);\r | |
397 | IEvent->ExFlag = TRUE;\r | |
398 | }\r | |
399 | \r | |
400 | *Event = IEvent;\r | |
401 | \r | |
71f68914 | 402 | if ((Type & EVT_RUNTIME) != 0) {\r |
28a00297 | 403 | //\r |
404 | // Keep a list of all RT events so we can tell the RT AP.\r | |
405 | //\r | |
406 | IEvent->RuntimeData.Type = Type;\r | |
407 | IEvent->RuntimeData.NotifyTpl = NotifyTpl;\r | |
408 | IEvent->RuntimeData.NotifyFunction = NotifyFunction;\r | |
409 | IEvent->RuntimeData.NotifyContext = (VOID *) NotifyContext;\r | |
410 | IEvent->RuntimeData.Event = (EFI_EVENT *) IEvent;\r | |
411 | InsertTailList (&gRuntime->EventHead, &IEvent->RuntimeData.Link);\r | |
412 | }\r | |
413 | \r | |
414 | CoreAcquireEventLock ();\r | |
415 | \r | |
416 | if ((Type & EVT_NOTIFY_SIGNAL) != 0x00000000) {\r | |
417 | //\r | |
418 | // The Event's NotifyFunction must be queued whenever the event is signaled\r | |
419 | //\r | |
420 | InsertHeadList (&gEventSignalQueue, &IEvent->SignalLink);\r | |
421 | }\r | |
422 | \r | |
423 | CoreReleaseEventLock ();\r | |
424 | \r | |
425 | //\r | |
426 | // Done\r | |
427 | //\r | |
428 | return EFI_SUCCESS;\r | |
429 | }\r | |
430 | \r | |
431 | \r | |
432 | \r | |
28a00297 | 433 | \r |
162ed594 | 434 | /**\r |
e94a9ff7 | 435 | Signals the event. Queues the event to be notified if needed.\r |
28a00297 | 436 | \r |
e94a9ff7 | 437 | @param UserEvent The event to signal .\r |
28a00297 | 438 | \r |
022c6d45 | 439 | @retval EFI_INVALID_PARAMETER Parameters are not valid.\r |
162ed594 | 440 | @retval EFI_SUCCESS The event was signaled.\r |
28a00297 | 441 | \r |
162ed594 | 442 | **/\r |
443 | EFI_STATUS\r | |
444 | EFIAPI\r | |
445 | CoreSignalEvent (\r | |
446 | IN EFI_EVENT UserEvent\r | |
447 | )\r | |
28a00297 | 448 | {\r |
449 | IEVENT *Event;\r | |
450 | \r | |
451 | Event = UserEvent;\r | |
452 | \r | |
453 | if (Event == NULL) {\r | |
454 | return EFI_INVALID_PARAMETER;\r | |
455 | }\r | |
456 | \r | |
457 | if (Event->Signature != EVENT_SIGNATURE) {\r | |
458 | return EFI_INVALID_PARAMETER;\r | |
459 | }\r | |
460 | \r | |
461 | CoreAcquireEventLock ();\r | |
462 | \r | |
463 | //\r | |
464 | // If the event is not already signalled, do so\r | |
465 | //\r | |
466 | \r | |
467 | if (Event->SignalCount == 0x00000000) {\r | |
468 | Event->SignalCount++;\r | |
469 | \r | |
470 | //\r | |
471 | // If signalling type is a notify function, queue it\r | |
472 | //\r | |
473 | if (Event->Type & EVT_NOTIFY_SIGNAL) {\r | |
474 | if (Event->ExFlag) {\r | |
475 | //\r | |
476 | // The CreateEventEx() style requires all members of the Event Group\r | |
477 | // to be signaled.\r | |
478 | //\r | |
479 | CoreReleaseEventLock ();\r | |
480 | CoreNotifySignalList (&Event->EventGroup);\r | |
481 | CoreAcquireEventLock ();\r | |
482 | } else {\r | |
483 | CoreNotifyEvent (Event);\r | |
484 | }\r | |
485 | }\r | |
486 | }\r | |
487 | \r | |
488 | CoreReleaseEventLock ();\r | |
489 | return EFI_SUCCESS;\r | |
490 | }\r | |
491 | \r | |
492 | \r | |
162ed594 | 493 | \r |
494 | /**\r | |
495 | Check the status of an event.\r | |
496 | \r | |
022c6d45 | 497 | @param UserEvent The event to check\r |
162ed594 | 498 | \r |
022c6d45 | 499 | @retval EFI_SUCCESS The event is in the signaled state\r |
500 | @retval EFI_NOT_READY The event is not in the signaled state\r | |
162ed594 | 501 | @retval EFI_INVALID_PARAMETER Event is of type EVT_NOTIFY_SIGNAL\r |
502 | \r | |
503 | **/\r | |
28a00297 | 504 | EFI_STATUS\r |
505 | EFIAPI\r | |
506 | CoreCheckEvent (\r | |
507 | IN EFI_EVENT UserEvent\r | |
508 | )\r | |
28a00297 | 509 | {\r |
510 | IEVENT *Event;\r | |
511 | EFI_STATUS Status;\r | |
512 | \r | |
513 | Event = UserEvent;\r | |
514 | \r | |
515 | if (Event == NULL) {\r | |
516 | return EFI_INVALID_PARAMETER;\r | |
517 | }\r | |
518 | \r | |
519 | if (Event->Signature != EVENT_SIGNATURE) {\r | |
520 | return EFI_INVALID_PARAMETER;\r | |
521 | }\r | |
522 | \r | |
e94a9ff7 | 523 | if ((Event->Type & EVT_NOTIFY_SIGNAL) != 0) {\r |
28a00297 | 524 | return EFI_INVALID_PARAMETER;\r |
525 | }\r | |
526 | \r | |
527 | Status = EFI_NOT_READY;\r | |
528 | \r | |
529 | if (!Event->SignalCount && (Event->Type & EVT_NOTIFY_WAIT)) {\r | |
530 | \r | |
531 | //\r | |
532 | // Queue the wait notify function\r | |
533 | //\r | |
28a00297 | 534 | CoreAcquireEventLock ();\r |
535 | if (!Event->SignalCount) {\r | |
536 | CoreNotifyEvent (Event);\r | |
537 | }\r | |
538 | CoreReleaseEventLock ();\r | |
539 | }\r | |
540 | \r | |
541 | //\r | |
542 | // If the even looks signalled, get the lock and clear it\r | |
543 | //\r | |
544 | \r | |
545 | if (Event->SignalCount) {\r | |
546 | CoreAcquireEventLock ();\r | |
547 | \r | |
548 | if (Event->SignalCount) {\r | |
549 | Event->SignalCount = 0;\r | |
550 | Status = EFI_SUCCESS;\r | |
551 | }\r | |
552 | \r | |
553 | CoreReleaseEventLock ();\r | |
554 | }\r | |
555 | \r | |
556 | return Status;\r | |
557 | }\r | |
558 | \r | |
559 | \r | |
560 | \r | |
162ed594 | 561 | /**\r |
562 | Stops execution until an event is signaled.\r | |
563 | \r | |
022c6d45 | 564 | @param NumberOfEvents The number of events in the UserEvents array\r |
565 | @param UserEvents An array of EFI_EVENT\r | |
566 | @param UserIndex Pointer to the index of the event which\r | |
567 | satisfied the wait condition\r | |
162ed594 | 568 | \r |
022c6d45 | 569 | @retval EFI_SUCCESS The event indicated by Index was signaled.\r |
570 | @retval EFI_INVALID_PARAMETER The event indicated by Index has a notification\r | |
571 | function or Event was not a valid type\r | |
162ed594 | 572 | @retval EFI_UNSUPPORTED The current TPL is not TPL_APPLICATION\r |
573 | \r | |
574 | **/\r | |
28a00297 | 575 | EFI_STATUS\r |
576 | EFIAPI\r | |
577 | CoreWaitForEvent (\r | |
578 | IN UINTN NumberOfEvents,\r | |
579 | IN EFI_EVENT *UserEvents,\r | |
580 | OUT UINTN *UserIndex\r | |
581 | )\r | |
28a00297 | 582 | {\r |
583 | EFI_STATUS Status;\r | |
584 | UINTN Index;\r | |
585 | \r | |
586 | //\r | |
587 | // Can only WaitForEvent at TPL_APPLICATION\r | |
588 | //\r | |
589 | if (gEfiCurrentTpl != TPL_APPLICATION) {\r | |
590 | return EFI_UNSUPPORTED;\r | |
591 | }\r | |
592 | \r | |
593 | for(;;) {\r | |
594 | \r | |
595 | for(Index = 0; Index < NumberOfEvents; Index++) {\r | |
596 | \r | |
597 | Status = CoreCheckEvent (UserEvents[Index]);\r | |
598 | \r | |
599 | //\r | |
600 | // provide index of event that caused problem\r | |
601 | //\r | |
602 | if (Status != EFI_NOT_READY) {\r | |
603 | *UserIndex = Index;\r | |
604 | return Status;\r | |
605 | }\r | |
606 | }\r | |
607 | \r | |
608 | //\r | |
609 | // This was the location of the Idle loop callback in EFI 1.x reference\r | |
610 | // code. We don't have that concept in this base at this point.\r | |
611 | //\r | |
612 | }\r | |
613 | }\r | |
614 | \r | |
615 | \r | |
162ed594 | 616 | /**\r |
28a00297 | 617 | Closes an event and frees the event structure.\r |
618 | \r | |
022c6d45 | 619 | @param UserEvent Event to close\r |
28a00297 | 620 | \r |
022c6d45 | 621 | @retval EFI_INVALID_PARAMETER Parameters are not valid.\r |
162ed594 | 622 | @retval EFI_SUCCESS The event has been closed\r |
28a00297 | 623 | \r |
162ed594 | 624 | **/\r |
625 | EFI_STATUS\r | |
626 | EFIAPI\r | |
627 | CoreCloseEvent (\r | |
628 | IN EFI_EVENT UserEvent\r | |
629 | )\r | |
28a00297 | 630 | {\r |
631 | EFI_STATUS Status;\r | |
632 | IEVENT *Event;\r | |
633 | \r | |
634 | Event = UserEvent;\r | |
635 | \r | |
636 | if (Event == NULL) {\r | |
637 | return EFI_INVALID_PARAMETER;\r | |
638 | }\r | |
639 | \r | |
640 | if (Event->Signature != EVENT_SIGNATURE) {\r | |
641 | return EFI_INVALID_PARAMETER;\r | |
642 | }\r | |
643 | \r | |
644 | //\r | |
645 | // If it's a timer event, make sure it's not pending\r | |
646 | //\r | |
e94a9ff7 | 647 | if ((Event->Type & EVT_TIMER) != 0) {\r |
28a00297 | 648 | CoreSetTimer (Event, TimerCancel, 0);\r |
649 | }\r | |
650 | \r | |
651 | CoreAcquireEventLock ();\r | |
652 | \r | |
653 | //\r | |
654 | // If the event is queued somewhere, remove it\r | |
655 | //\r | |
656 | \r | |
657 | if (Event->RuntimeData.Link.ForwardLink != NULL) {\r | |
658 | RemoveEntryList (&Event->RuntimeData.Link);\r | |
659 | }\r | |
660 | \r | |
661 | if (Event->NotifyLink.ForwardLink != NULL) {\r | |
662 | RemoveEntryList (&Event->NotifyLink);\r | |
663 | }\r | |
664 | \r | |
665 | if (Event->SignalLink.ForwardLink != NULL) {\r | |
666 | RemoveEntryList (&Event->SignalLink);\r | |
667 | }\r | |
668 | \r | |
669 | CoreReleaseEventLock ();\r | |
670 | \r | |
671 | //\r | |
672 | // If the event is registered on a protocol notify, then remove it from the protocol database\r | |
673 | //\r | |
674 | CoreUnregisterProtocolNotify (Event);\r | |
675 | \r | |
676 | Status = CoreFreePool (Event);\r | |
677 | ASSERT_EFI_ERROR (Status);\r | |
678 | \r | |
679 | return Status;\r | |
680 | }\r |