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3e8ad6bd JF |
1 | /** @file\r |
2 | MP initialize support functions for DXE phase.\r | |
3 | \r | |
4 | Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | 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 | |
13 | **/\r | |
14 | \r | |
15 | #include "MpLib.h"\r | |
96378861 JF |
16 | \r |
17 | #include <Library/UefiLib.h>\r | |
18 | #include <Library/UefiBootServicesTableLib.h>\r | |
19 | \r | |
20 | #define AP_CHECK_INTERVAL (EFI_TIMER_PERIOD_MILLISECONDS (100))\r | |
21 | \r | |
93ca4c0f | 22 | CPU_MP_DATA *mCpuMpData = NULL;\r |
96378861 | 23 | EFI_EVENT mCheckAllApsEvent = NULL;\r |
4d3314f6 | 24 | EFI_EVENT mMpInitExitBootServicesEvent = NULL;\r |
96378861 | 25 | volatile BOOLEAN mStopCheckAllApsStatus = TRUE;\r |
5183fb37 | 26 | VOID *mReservedApLoopFunc = NULL;\r |
93ca4c0f JF |
27 | \r |
28 | /**\r | |
29 | Get the pointer to CPU MP Data structure.\r | |
30 | \r | |
31 | @return The pointer to CPU MP Data structure.\r | |
32 | **/\r | |
33 | CPU_MP_DATA *\r | |
34 | GetCpuMpData (\r | |
35 | VOID\r | |
36 | )\r | |
37 | {\r | |
38 | ASSERT (mCpuMpData != NULL);\r | |
39 | return mCpuMpData;\r | |
40 | }\r | |
41 | \r | |
42 | /**\r | |
43 | Save the pointer to CPU MP Data structure.\r | |
44 | \r | |
45 | @param[in] CpuMpData The pointer to CPU MP Data structure will be saved.\r | |
46 | **/\r | |
47 | VOID\r | |
48 | SaveCpuMpData (\r | |
49 | IN CPU_MP_DATA *CpuMpData\r | |
50 | )\r | |
51 | {\r | |
52 | mCpuMpData = CpuMpData;\r | |
53 | }\r | |
54 | \r | |
96378861 | 55 | /**\r |
ed66e0e3 JF |
56 | Allocate reset vector buffer.\r |
57 | \r | |
58 | @param[in, out] CpuMpData The pointer to CPU MP Data structure.\r | |
59 | **/\r | |
60 | VOID\r | |
61 | AllocateResetVector (\r | |
62 | IN OUT CPU_MP_DATA *CpuMpData\r | |
63 | )\r | |
64 | {\r | |
65 | EFI_STATUS Status;\r | |
66 | UINTN ApResetVectorSize;\r | |
67 | EFI_PHYSICAL_ADDRESS StartAddress;\r | |
68 | \r | |
3ed4e502 JF |
69 | if (CpuMpData->SaveRestoreFlag) {\r |
70 | BackupAndPrepareWakeupBuffer (CpuMpData);\r | |
71 | } else {\r | |
72 | ApResetVectorSize = CpuMpData->AddressMap.RendezvousFunnelSize +\r | |
73 | sizeof (MP_CPU_EXCHANGE_INFO);\r | |
74 | \r | |
75 | StartAddress = BASE_1MB;\r | |
76 | Status = gBS->AllocatePages (\r | |
77 | AllocateMaxAddress,\r | |
78 | EfiACPIMemoryNVS,\r | |
79 | EFI_SIZE_TO_PAGES (ApResetVectorSize),\r | |
80 | &StartAddress\r | |
81 | );\r | |
82 | ASSERT_EFI_ERROR (Status);\r | |
83 | \r | |
84 | CpuMpData->WakeupBuffer = (UINTN) StartAddress;\r | |
85 | CpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN)\r | |
ed66e0e3 | 86 | (CpuMpData->WakeupBuffer + CpuMpData->AddressMap.RendezvousFunnelSize);\r |
3ed4e502 JF |
87 | //\r |
88 | // copy AP reset code in it\r | |
89 | //\r | |
90 | CopyMem (\r | |
91 | (VOID *) CpuMpData->WakeupBuffer,\r | |
92 | (VOID *) CpuMpData->AddressMap.RendezvousFunnelAddress,\r | |
93 | CpuMpData->AddressMap.RendezvousFunnelSize\r | |
94 | );\r | |
95 | }\r | |
ed66e0e3 JF |
96 | }\r |
97 | \r | |
98 | /**\r | |
99 | Free AP reset vector buffer.\r | |
100 | \r | |
101 | @param[in] CpuMpData The pointer to CPU MP Data structure.\r | |
102 | **/\r | |
103 | VOID\r | |
104 | FreeResetVector (\r | |
105 | IN CPU_MP_DATA *CpuMpData\r | |
106 | )\r | |
107 | {\r | |
108 | EFI_STATUS Status;\r | |
109 | UINTN ApResetVectorSize;\r | |
3ed4e502 JF |
110 | \r |
111 | if (CpuMpData->SaveRestoreFlag) {\r | |
112 | RestoreWakeupBuffer (CpuMpData);\r | |
113 | } else {\r | |
114 | ApResetVectorSize = CpuMpData->AddressMap.RendezvousFunnelSize +\r | |
115 | sizeof (MP_CPU_EXCHANGE_INFO);\r | |
116 | Status = gBS->FreePages(\r | |
117 | (EFI_PHYSICAL_ADDRESS)CpuMpData->WakeupBuffer,\r | |
118 | EFI_SIZE_TO_PAGES (ApResetVectorSize)\r | |
119 | );\r | |
120 | ASSERT_EFI_ERROR (Status);\r | |
121 | }\r | |
ed66e0e3 JF |
122 | }\r |
123 | \r | |
96378861 JF |
124 | /**\r |
125 | Checks APs status and updates APs status if needed.\r | |
126 | \r | |
127 | **/\r | |
128 | VOID\r | |
129 | CheckAndUpdateApsStatus (\r | |
130 | VOID\r | |
131 | )\r | |
132 | {\r | |
08085f08 JF |
133 | UINTN ProcessorNumber;\r |
134 | EFI_STATUS Status;\r | |
135 | CPU_MP_DATA *CpuMpData;\r | |
136 | \r | |
137 | CpuMpData = GetCpuMpData ();\r | |
138 | \r | |
139 | //\r | |
140 | // First, check whether pending StartupAllAPs() exists.\r | |
141 | //\r | |
142 | if (CpuMpData->WaitEvent != NULL) {\r | |
143 | \r | |
144 | Status = CheckAllAPs ();\r | |
145 | //\r | |
146 | // If all APs finish for StartupAllAPs(), signal the WaitEvent for it.\r | |
147 | //\r | |
148 | if (Status != EFI_NOT_READY) {\r | |
149 | Status = gBS->SignalEvent (CpuMpData->WaitEvent);\r | |
150 | CpuMpData->WaitEvent = NULL;\r | |
151 | }\r | |
152 | }\r | |
153 | \r | |
154 | //\r | |
155 | // Second, check whether pending StartupThisAPs() callings exist.\r | |
156 | //\r | |
157 | for (ProcessorNumber = 0; ProcessorNumber < CpuMpData->CpuCount; ProcessorNumber++) {\r | |
158 | \r | |
159 | if (CpuMpData->CpuData[ProcessorNumber].WaitEvent == NULL) {\r | |
160 | continue;\r | |
161 | }\r | |
162 | \r | |
163 | Status = CheckThisAP (ProcessorNumber);\r | |
164 | \r | |
165 | if (Status != EFI_NOT_READY) {\r | |
166 | gBS->SignalEvent (CpuMpData->CpuData[ProcessorNumber].WaitEvent);\r | |
167 | CpuMpData->CpuData[ProcessorNumber].WaitEvent = NULL;\r | |
168 | }\r | |
169 | }\r | |
96378861 JF |
170 | }\r |
171 | \r | |
172 | /**\r | |
173 | Checks APs' status periodically.\r | |
174 | \r | |
438f1766 | 175 | This function is triggered by timer periodically to check the\r |
96378861 JF |
176 | state of APs for StartupAllAPs() and StartupThisAP() executed\r |
177 | in non-blocking mode.\r | |
178 | \r | |
179 | @param[in] Event Event triggered.\r | |
180 | @param[in] Context Parameter passed with the event.\r | |
181 | \r | |
182 | **/\r | |
183 | VOID\r | |
184 | EFIAPI\r | |
185 | CheckApsStatus (\r | |
186 | IN EFI_EVENT Event,\r | |
187 | IN VOID *Context\r | |
188 | )\r | |
189 | {\r | |
190 | //\r | |
191 | // If CheckApsStatus() is not stopped, otherwise return immediately.\r | |
192 | //\r | |
193 | if (!mStopCheckAllApsStatus) {\r | |
194 | CheckAndUpdateApsStatus ();\r | |
195 | }\r | |
196 | }\r | |
ed66e0e3 | 197 | \r |
4d3314f6 JF |
198 | /**\r |
199 | Get Protected mode code segment from current GDT table.\r | |
200 | \r | |
b31c1ad1 | 201 | @return Protected mode code segment value.\r |
4d3314f6 JF |
202 | **/\r |
203 | UINT16\r | |
204 | GetProtectedModeCS (\r | |
205 | VOID\r | |
206 | )\r | |
207 | {\r | |
208 | IA32_DESCRIPTOR GdtrDesc;\r | |
209 | IA32_SEGMENT_DESCRIPTOR *GdtEntry;\r | |
210 | UINTN GdtEntryCount;\r | |
211 | UINT16 Index;\r | |
212 | \r | |
213 | Index = (UINT16) -1;\r | |
214 | AsmReadGdtr (&GdtrDesc);\r | |
215 | GdtEntryCount = (GdtrDesc.Limit + 1) / sizeof (IA32_SEGMENT_DESCRIPTOR);\r | |
216 | GdtEntry = (IA32_SEGMENT_DESCRIPTOR *) GdtrDesc.Base;\r | |
217 | for (Index = 0; Index < GdtEntryCount; Index++) {\r | |
218 | if (GdtEntry->Bits.L == 0) {\r | |
219 | if (GdtEntry->Bits.Type > 8 && GdtEntry->Bits.L == 0) {\r | |
220 | break;\r | |
221 | }\r | |
222 | }\r | |
223 | GdtEntry++;\r | |
224 | }\r | |
225 | ASSERT (Index != -1);\r | |
226 | return Index * 8;\r | |
227 | }\r | |
228 | \r | |
229 | /**\r | |
230 | Do sync on APs.\r | |
231 | \r | |
232 | @param[in, out] Buffer Pointer to private data buffer.\r | |
233 | **/\r | |
234 | VOID\r | |
235 | EFIAPI\r | |
236 | RelocateApLoop (\r | |
237 | IN OUT VOID *Buffer\r | |
238 | )\r | |
239 | {\r | |
240 | CPU_MP_DATA *CpuMpData;\r | |
241 | BOOLEAN MwaitSupport;\r | |
242 | ASM_RELOCATE_AP_LOOP AsmRelocateApLoopFunc;\r | |
243 | \r | |
244 | CpuMpData = GetCpuMpData ();\r | |
245 | MwaitSupport = IsMwaitSupport ();\r | |
246 | AsmRelocateApLoopFunc = (ASM_RELOCATE_AP_LOOP) (UINTN) Buffer;\r | |
247 | AsmRelocateApLoopFunc (MwaitSupport, CpuMpData->ApTargetCState, CpuMpData->PmCodeSegment);\r | |
248 | //\r | |
249 | // It should never reach here\r | |
250 | //\r | |
251 | ASSERT (FALSE);\r | |
252 | }\r | |
253 | \r | |
254 | /**\r | |
255 | Callback function for ExitBootServices.\r | |
256 | \r | |
257 | @param[in] Event Event whose notification function is being invoked.\r | |
258 | @param[in] Context The pointer to the notification function's context,\r | |
259 | which is implementation-dependent.\r | |
260 | \r | |
261 | **/\r | |
262 | VOID\r | |
263 | EFIAPI\r | |
86af2eb8 | 264 | MpInitChangeApLoopCallback (\r |
4d3314f6 JF |
265 | IN EFI_EVENT Event,\r |
266 | IN VOID *Context\r | |
267 | )\r | |
268 | {\r | |
269 | CPU_MP_DATA *CpuMpData;\r | |
5183fb37 | 270 | \r |
4d3314f6 | 271 | CpuMpData = GetCpuMpData ();\r |
3ed4e502 | 272 | CpuMpData->SaveRestoreFlag = TRUE;\r |
4d3314f6 JF |
273 | CpuMpData->PmCodeSegment = GetProtectedModeCS ();\r |
274 | CpuMpData->ApLoopMode = PcdGet8 (PcdCpuApLoopMode);\r | |
5183fb37 | 275 | WakeUpAP (CpuMpData, TRUE, 0, RelocateApLoop, mReservedApLoopFunc);\r |
86af2eb8 | 276 | DEBUG ((DEBUG_INFO, "%a() done!\n", __FUNCTION__));\r |
4d3314f6 JF |
277 | }\r |
278 | \r | |
93ca4c0f JF |
279 | /**\r |
280 | Initialize global data for MP support.\r | |
281 | \r | |
282 | @param[in] CpuMpData The pointer to CPU MP Data structure.\r | |
283 | **/\r | |
284 | VOID\r | |
285 | InitMpGlobalData (\r | |
286 | IN CPU_MP_DATA *CpuMpData\r | |
287 | )\r | |
288 | {\r | |
ffd6b0b1 JF |
289 | EFI_STATUS Status;\r |
290 | EFI_PHYSICAL_ADDRESS Address;\r | |
96378861 | 291 | \r |
93ca4c0f JF |
292 | SaveCpuMpData (CpuMpData);\r |
293 | \r | |
14e8137c JF |
294 | if (CpuMpData->CpuCount == 1) {\r |
295 | //\r | |
296 | // If only BSP exists, return\r | |
297 | //\r | |
298 | return;\r | |
299 | }\r | |
300 | \r | |
5183fb37 | 301 | //\r |
ffd6b0b1 JF |
302 | // Avoid APs access invalid buffer data which allocated by BootServices,\r |
303 | // so we will allocate reserved data for AP loop code. We also need to\r | |
304 | // allocate this buffer below 4GB due to APs may be transferred to 32bit\r | |
305 | // protected mode on long mode DXE.\r | |
5183fb37 JF |
306 | // Allocating it in advance since memory services are not available in\r |
307 | // Exit Boot Services callback function.\r | |
308 | //\r | |
ffd6b0b1 JF |
309 | Address = BASE_4GB - 1;\r |
310 | Status = gBS->AllocatePages (\r | |
311 | AllocateMaxAddress,\r | |
312 | EfiReservedMemoryType,\r | |
313 | EFI_SIZE_TO_PAGES (sizeof (CpuMpData->AddressMap.RelocateApLoopFuncSize)),\r | |
314 | &Address\r | |
315 | );\r | |
316 | ASSERT_EFI_ERROR (Status);\r | |
317 | mReservedApLoopFunc = (VOID *) (UINTN) Address;\r | |
5183fb37 | 318 | ASSERT (mReservedApLoopFunc != NULL);\r |
ffd6b0b1 JF |
319 | CopyMem (\r |
320 | mReservedApLoopFunc,\r | |
321 | CpuMpData->AddressMap.RelocateApLoopFuncAddress,\r | |
322 | CpuMpData->AddressMap.RelocateApLoopFuncSize\r | |
323 | );\r | |
5183fb37 | 324 | \r |
96378861 JF |
325 | Status = gBS->CreateEvent (\r |
326 | EVT_TIMER | EVT_NOTIFY_SIGNAL,\r | |
327 | TPL_NOTIFY,\r | |
328 | CheckApsStatus,\r | |
329 | NULL,\r | |
330 | &mCheckAllApsEvent\r | |
331 | );\r | |
332 | ASSERT_EFI_ERROR (Status);\r | |
333 | \r | |
334 | //\r | |
335 | // Set timer to check all APs status.\r | |
336 | //\r | |
337 | Status = gBS->SetTimer (\r | |
338 | mCheckAllApsEvent,\r | |
339 | TimerPeriodic,\r | |
340 | AP_CHECK_INTERVAL\r | |
341 | );\r | |
342 | ASSERT_EFI_ERROR (Status);\r | |
4d3314f6 JF |
343 | Status = gBS->CreateEvent (\r |
344 | EVT_SIGNAL_EXIT_BOOT_SERVICES,\r | |
345 | TPL_CALLBACK,\r | |
86af2eb8 | 346 | MpInitChangeApLoopCallback,\r |
4d3314f6 JF |
347 | NULL,\r |
348 | &mMpInitExitBootServicesEvent\r | |
349 | );\r | |
350 | ASSERT_EFI_ERROR (Status);\r | |
93ca4c0f | 351 | }\r |
3e8ad6bd JF |
352 | \r |
353 | /**\r | |
354 | This service executes a caller provided function on all enabled APs.\r | |
355 | \r | |
356 | @param[in] Procedure A pointer to the function to be run on\r | |
357 | enabled APs of the system. See type\r | |
358 | EFI_AP_PROCEDURE.\r | |
359 | @param[in] SingleThread If TRUE, then all the enabled APs execute\r | |
360 | the function specified by Procedure one by\r | |
361 | one, in ascending order of processor handle\r | |
362 | number. If FALSE, then all the enabled APs\r | |
363 | execute the function specified by Procedure\r | |
364 | simultaneously.\r | |
365 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
366 | service. If it is NULL, then execute in\r | |
367 | blocking mode. BSP waits until all APs finish\r | |
368 | or TimeoutInMicroSeconds expires. If it's\r | |
369 | not NULL, then execute in non-blocking mode.\r | |
370 | BSP requests the function specified by\r | |
371 | Procedure to be started on all the enabled\r | |
372 | APs, and go on executing immediately. If\r | |
373 | all return from Procedure, or TimeoutInMicroSeconds\r | |
374 | expires, this event is signaled. The BSP\r | |
375 | can use the CheckEvent() or WaitForEvent()\r | |
376 | services to check the state of event. Type\r | |
377 | EFI_EVENT is defined in CreateEvent() in\r | |
378 | the Unified Extensible Firmware Interface\r | |
379 | Specification.\r | |
380 | @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for\r | |
381 | APs to return from Procedure, either for\r | |
382 | blocking or non-blocking mode. Zero means\r | |
383 | infinity. If the timeout expires before\r | |
384 | all APs return from Procedure, then Procedure\r | |
385 | on the failed APs is terminated. All enabled\r | |
386 | APs are available for next function assigned\r | |
387 | by MpInitLibStartupAllAPs() or\r | |
388 | MPInitLibStartupThisAP().\r | |
389 | If the timeout expires in blocking mode,\r | |
390 | BSP returns EFI_TIMEOUT. If the timeout\r | |
391 | expires in non-blocking mode, WaitEvent\r | |
392 | is signaled with SignalEvent().\r | |
393 | @param[in] ProcedureArgument The parameter passed into Procedure for\r | |
394 | all APs.\r | |
395 | @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,\r | |
396 | if all APs finish successfully, then its\r | |
397 | content is set to NULL. If not all APs\r | |
398 | finish before timeout expires, then its\r | |
399 | content is set to address of the buffer\r | |
400 | holding handle numbers of the failed APs.\r | |
401 | The buffer is allocated by MP Initialization\r | |
402 | library, and it's the caller's responsibility to\r | |
403 | free the buffer with FreePool() service.\r | |
404 | In blocking mode, it is ready for consumption\r | |
405 | when the call returns. In non-blocking mode,\r | |
406 | it is ready when WaitEvent is signaled. The\r | |
407 | list of failed CPU is terminated by\r | |
408 | END_OF_CPU_LIST.\r | |
409 | \r | |
410 | @retval EFI_SUCCESS In blocking mode, all APs have finished before\r | |
411 | the timeout expired.\r | |
412 | @retval EFI_SUCCESS In non-blocking mode, function has been dispatched\r | |
413 | to all enabled APs.\r | |
414 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
415 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
416 | signaled.\r | |
417 | @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not\r | |
418 | supported.\r | |
419 | @retval EFI_DEVICE_ERROR Caller processor is AP.\r | |
420 | @retval EFI_NOT_STARTED No enabled APs exist in the system.\r | |
421 | @retval EFI_NOT_READY Any enabled APs are busy.\r | |
422 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
423 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
424 | all enabled APs have finished.\r | |
425 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
426 | \r | |
427 | **/\r | |
428 | EFI_STATUS\r | |
429 | EFIAPI\r | |
430 | MpInitLibStartupAllAPs (\r | |
431 | IN EFI_AP_PROCEDURE Procedure,\r | |
432 | IN BOOLEAN SingleThread,\r | |
433 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
434 | IN UINTN TimeoutInMicroseconds,\r | |
435 | IN VOID *ProcedureArgument OPTIONAL,\r | |
436 | OUT UINTN **FailedCpuList OPTIONAL\r | |
437 | )\r | |
438 | {\r | |
86efe976 JF |
439 | EFI_STATUS Status;\r |
440 | \r | |
441 | //\r | |
442 | // Temporarily stop checkAllApsStatus for avoid resource dead-lock.\r | |
443 | //\r | |
444 | mStopCheckAllApsStatus = TRUE;\r | |
445 | \r | |
446 | Status = StartupAllAPsWorker (\r | |
447 | Procedure,\r | |
448 | SingleThread,\r | |
449 | WaitEvent,\r | |
450 | TimeoutInMicroseconds,\r | |
451 | ProcedureArgument,\r | |
452 | FailedCpuList\r | |
453 | );\r | |
454 | \r | |
455 | //\r | |
456 | // Start checkAllApsStatus\r | |
457 | //\r | |
458 | mStopCheckAllApsStatus = FALSE;\r | |
459 | \r | |
460 | return Status;\r | |
3e8ad6bd JF |
461 | }\r |
462 | \r | |
463 | /**\r | |
464 | This service lets the caller get one enabled AP to execute a caller-provided\r | |
465 | function.\r | |
466 | \r | |
467 | @param[in] Procedure A pointer to the function to be run on the\r | |
468 | designated AP of the system. See type\r | |
469 | EFI_AP_PROCEDURE.\r | |
470 | @param[in] ProcessorNumber The handle number of the AP. The range is\r | |
471 | from 0 to the total number of logical\r | |
472 | processors minus 1. The total number of\r | |
473 | logical processors can be retrieved by\r | |
474 | MpInitLibGetNumberOfProcessors().\r | |
475 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
476 | service. If it is NULL, then execute in\r | |
477 | blocking mode. BSP waits until this AP finish\r | |
478 | or TimeoutInMicroSeconds expires. If it's\r | |
479 | not NULL, then execute in non-blocking mode.\r | |
480 | BSP requests the function specified by\r | |
481 | Procedure to be started on this AP,\r | |
482 | and go on executing immediately. If this AP\r | |
483 | return from Procedure or TimeoutInMicroSeconds\r | |
484 | expires, this event is signaled. The BSP\r | |
485 | can use the CheckEvent() or WaitForEvent()\r | |
486 | services to check the state of event. Type\r | |
487 | EFI_EVENT is defined in CreateEvent() in\r | |
488 | the Unified Extensible Firmware Interface\r | |
489 | Specification.\r | |
490 | @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for\r | |
491 | this AP to finish this Procedure, either for\r | |
492 | blocking or non-blocking mode. Zero means\r | |
493 | infinity. If the timeout expires before\r | |
494 | this AP returns from Procedure, then Procedure\r | |
495 | on the AP is terminated. The\r | |
496 | AP is available for next function assigned\r | |
497 | by MpInitLibStartupAllAPs() or\r | |
498 | MpInitLibStartupThisAP().\r | |
499 | If the timeout expires in blocking mode,\r | |
500 | BSP returns EFI_TIMEOUT. If the timeout\r | |
501 | expires in non-blocking mode, WaitEvent\r | |
502 | is signaled with SignalEvent().\r | |
503 | @param[in] ProcedureArgument The parameter passed into Procedure on the\r | |
504 | specified AP.\r | |
505 | @param[out] Finished If NULL, this parameter is ignored. In\r | |
506 | blocking mode, this parameter is ignored.\r | |
507 | In non-blocking mode, if AP returns from\r | |
508 | Procedure before the timeout expires, its\r | |
509 | content is set to TRUE. Otherwise, the\r | |
510 | value is set to FALSE. The caller can\r | |
511 | determine if the AP returned from Procedure\r | |
512 | by evaluating this value.\r | |
513 | \r | |
514 | @retval EFI_SUCCESS In blocking mode, specified AP finished before\r | |
515 | the timeout expires.\r | |
516 | @retval EFI_SUCCESS In non-blocking mode, the function has been\r | |
517 | dispatched to specified AP.\r | |
518 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
519 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
520 | signaled.\r | |
521 | @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not\r | |
522 | supported.\r | |
523 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
524 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
525 | the specified AP has finished.\r | |
526 | @retval EFI_NOT_READY The specified AP is busy.\r | |
527 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
528 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
529 | ProcessorNumber does not exist.\r | |
530 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.\r | |
531 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
532 | \r | |
533 | **/\r | |
534 | EFI_STATUS\r | |
535 | EFIAPI\r | |
536 | MpInitLibStartupThisAP (\r | |
537 | IN EFI_AP_PROCEDURE Procedure,\r | |
538 | IN UINTN ProcessorNumber,\r | |
539 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
540 | IN UINTN TimeoutInMicroseconds,\r | |
541 | IN VOID *ProcedureArgument OPTIONAL,\r | |
542 | OUT BOOLEAN *Finished OPTIONAL\r | |
543 | )\r | |
544 | {\r | |
20ae5774 JF |
545 | EFI_STATUS Status;\r |
546 | \r | |
547 | //\r | |
548 | // temporarily stop checkAllApsStatus for avoid resource dead-lock.\r | |
549 | //\r | |
550 | mStopCheckAllApsStatus = TRUE;\r | |
551 | \r | |
552 | Status = StartupThisAPWorker (\r | |
553 | Procedure,\r | |
554 | ProcessorNumber,\r | |
555 | WaitEvent,\r | |
556 | TimeoutInMicroseconds,\r | |
557 | ProcedureArgument,\r | |
558 | Finished\r | |
559 | );\r | |
560 | \r | |
561 | mStopCheckAllApsStatus = FALSE;\r | |
562 | \r | |
563 | return Status;\r | |
3e8ad6bd JF |
564 | }\r |
565 | \r | |
566 | /**\r | |
567 | This service switches the requested AP to be the BSP from that point onward.\r | |
568 | This service changes the BSP for all purposes. This call can only be performed\r | |
569 | by the current BSP.\r | |
570 | \r | |
571 | @param[in] ProcessorNumber The handle number of AP that is to become the new\r | |
572 | BSP. The range is from 0 to the total number of\r | |
573 | logical processors minus 1. The total number of\r | |
574 | logical processors can be retrieved by\r | |
575 | MpInitLibGetNumberOfProcessors().\r | |
576 | @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an\r | |
577 | enabled AP. Otherwise, it will be disabled.\r | |
578 | \r | |
579 | @retval EFI_SUCCESS BSP successfully switched.\r | |
580 | @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to\r | |
581 | this service returning.\r | |
582 | @retval EFI_UNSUPPORTED Switching the BSP is not supported.\r | |
583 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
584 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
585 | ProcessorNumber does not exist.\r | |
586 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or\r | |
587 | a disabled AP.\r | |
588 | @retval EFI_NOT_READY The specified AP is busy.\r | |
589 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
590 | \r | |
591 | **/\r | |
592 | EFI_STATUS\r | |
593 | EFIAPI\r | |
594 | MpInitLibSwitchBSP (\r | |
595 | IN UINTN ProcessorNumber,\r | |
596 | IN BOOLEAN EnableOldBSP\r | |
597 | )\r | |
598 | {\r | |
41be0da5 JF |
599 | EFI_STATUS Status;\r |
600 | BOOLEAN OldInterruptState;\r | |
601 | \r | |
602 | //\r | |
603 | // Before send both BSP and AP to a procedure to exchange their roles,\r | |
604 | // interrupt must be disabled. This is because during the exchange role\r | |
605 | // process, 2 CPU may use 1 stack. If interrupt happens, the stack will\r | |
606 | // be corrupted, since interrupt return address will be pushed to stack\r | |
607 | // by hardware.\r | |
608 | //\r | |
609 | OldInterruptState = SaveAndDisableInterrupts ();\r | |
610 | \r | |
611 | //\r | |
612 | // Mask LINT0 & LINT1 for the old BSP\r | |
613 | //\r | |
614 | DisableLvtInterrupts ();\r | |
615 | \r | |
616 | Status = SwitchBSPWorker (ProcessorNumber, EnableOldBSP);\r | |
617 | \r | |
618 | //\r | |
619 | // Restore interrupt state.\r | |
620 | //\r | |
621 | SetInterruptState (OldInterruptState);\r | |
622 | \r | |
623 | return Status;\r | |
3e8ad6bd JF |
624 | }\r |
625 | \r | |
626 | /**\r | |
627 | This service lets the caller enable or disable an AP from this point onward.\r | |
628 | This service may only be called from the BSP.\r | |
629 | \r | |
630 | @param[in] ProcessorNumber The handle number of AP.\r | |
631 | The range is from 0 to the total number of\r | |
632 | logical processors minus 1. The total number of\r | |
633 | logical processors can be retrieved by\r | |
634 | MpInitLibGetNumberOfProcessors().\r | |
635 | @param[in] EnableAP Specifies the new state for the processor for\r | |
636 | enabled, FALSE for disabled.\r | |
637 | @param[in] HealthFlag If not NULL, a pointer to a value that specifies\r | |
638 | the new health status of the AP. This flag\r | |
639 | corresponds to StatusFlag defined in\r | |
640 | EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only\r | |
641 | the PROCESSOR_HEALTH_STATUS_BIT is used. All other\r | |
642 | bits are ignored. If it is NULL, this parameter\r | |
643 | is ignored.\r | |
644 | \r | |
645 | @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.\r | |
646 | @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed\r | |
647 | prior to this service returning.\r | |
648 | @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.\r | |
649 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
650 | @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber\r | |
651 | does not exist.\r | |
652 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.\r | |
653 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
654 | \r | |
655 | **/\r | |
656 | EFI_STATUS\r | |
657 | EFIAPI\r | |
658 | MpInitLibEnableDisableAP (\r | |
659 | IN UINTN ProcessorNumber,\r | |
660 | IN BOOLEAN EnableAP,\r | |
661 | IN UINT32 *HealthFlag OPTIONAL\r | |
662 | )\r | |
663 | {\r | |
e37109bc JF |
664 | EFI_STATUS Status;\r |
665 | BOOLEAN TempStopCheckState;\r | |
666 | \r | |
667 | TempStopCheckState = FALSE;\r | |
668 | //\r | |
669 | // temporarily stop checkAllAPsStatus for initialize parameters.\r | |
670 | //\r | |
671 | if (!mStopCheckAllApsStatus) {\r | |
672 | mStopCheckAllApsStatus = TRUE;\r | |
673 | TempStopCheckState = TRUE;\r | |
674 | }\r | |
675 | \r | |
676 | Status = EnableDisableApWorker (ProcessorNumber, EnableAP, HealthFlag);\r | |
677 | \r | |
678 | if (TempStopCheckState) {\r | |
679 | mStopCheckAllApsStatus = FALSE;\r | |
680 | }\r | |
681 | \r | |
682 | return Status;\r | |
3e8ad6bd | 683 | }\r |