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1 | /** @file\r | |
2 | Construct MP Services Protocol on top of the EMU Thread protocol.\r | |
3 | This code makes APs show up in the emulator. PcdEmuApCount is the\r | |
4 | number of APs the emulator should produce.\r | |
5 | \r | |
6 | The MP Services Protocol provides a generalized way of performing following tasks:\r | |
7 | - Retrieving information of multi-processor environment and MP-related status of\r | |
8 | specific processors.\r | |
9 | - Dispatching user-provided function to APs.\r | |
10 | - Maintain MP-related processor status.\r | |
11 | \r | |
12 | The MP Services Protocol must be produced on any system with more than one logical\r | |
13 | processor.\r | |
14 | \r | |
15 | The Protocol is available only during boot time.\r | |
16 | \r | |
17 | MP Services Protocol is hardware-independent. Most of the logic of this protocol\r | |
18 | is architecturally neutral. It abstracts the multi-processor environment and\r | |
19 | status of processors, and provides interfaces to retrieve information, maintain,\r | |
20 | and dispatch.\r | |
21 | \r | |
22 | MP Services Protocol may be consumed by ACPI module. The ACPI module may use this\r | |
23 | protocol to retrieve data that are needed for an MP platform and report them to OS.\r | |
24 | MP Services Protocol may also be used to program and configure processors, such\r | |
25 | as MTRR synchronization for memory space attributes setting in DXE Services.\r | |
26 | MP Services Protocol may be used by non-CPU DXE drivers to speed up platform boot\r | |
27 | by taking advantage of the processing capabilities of the APs, for example, using\r | |
28 | APs to help test system memory in parallel with other device initialization.\r | |
29 | Diagnostics applications may also use this protocol for multi-processor.\r | |
30 | \r | |
31 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
32 | Portitions Copyright (c) 2011, Apple Inc. All rights reserved.\r | |
33 | This program and the accompanying materials are licensed and made available under\r | |
34 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
35 | The full text of the license may be found at\r | |
36 | http://opensource.org/licenses/bsd-license.php.\r | |
37 | \r | |
38 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
39 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
40 | \r | |
41 | \r | |
42 | **/\r | |
43 | \r | |
44 | #include "CpuDriver.h"\r | |
45 | \r | |
46 | \r | |
47 | MP_SYSTEM_DATA gMPSystem;\r | |
48 | EMU_THREAD_THUNK_PROTOCOL *gThread = NULL;\r | |
49 | EFI_EVENT gReadToBootEvent;\r | |
50 | BOOLEAN gReadToBoot = FALSE;\r | |
51 | UINTN gPollInterval;\r | |
52 | \r | |
53 | \r | |
54 | BOOLEAN\r | |
55 | IsBSP (\r | |
56 | VOID\r | |
57 | )\r | |
58 | {\r | |
59 | EFI_STATUS Status;\r | |
60 | UINTN ProcessorNumber;\r | |
61 | \r | |
62 | Status = CpuMpServicesWhoAmI (&mMpSercicesTemplate, &ProcessorNumber);\r | |
63 | if (EFI_ERROR (Status)) {\r | |
64 | return FALSE;\r | |
65 | }\r | |
66 | \r | |
67 | return (gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0;\r | |
68 | }\r | |
69 | \r | |
70 | \r | |
71 | VOID\r | |
72 | SetApProcedure (\r | |
73 | IN PROCESSOR_DATA_BLOCK *Processor,\r | |
74 | IN EFI_AP_PROCEDURE Procedure,\r | |
75 | IN VOID *ProcedureArgument\r | |
76 | )\r | |
77 | {\r | |
78 | gThread->MutexLock (Processor->ProcedureLock);\r | |
79 | Processor->Parameter = ProcedureArgument;\r | |
80 | Processor->Procedure = Procedure;\r | |
81 | gThread->MutexUnlock (Processor->ProcedureLock);\r | |
82 | }\r | |
83 | \r | |
84 | \r | |
85 | EFI_STATUS\r | |
86 | GetNextBlockedNumber (\r | |
87 | OUT UINTN *NextNumber\r | |
88 | )\r | |
89 | {\r | |
90 | UINTN Number;\r | |
91 | PROCESSOR_STATE ProcessorState;\r | |
92 | PROCESSOR_DATA_BLOCK *Data;\r | |
93 | \r | |
94 | for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {\r | |
95 | Data = &gMPSystem.ProcessorData[Number];\r | |
96 | if ((Data->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {\r | |
97 | // Skip BSP\r | |
98 | continue;\r | |
99 | }\r | |
100 | \r | |
101 | gThread->MutexLock (Data->StateLock);\r | |
102 | ProcessorState = Data->State;\r | |
103 | gThread->MutexUnlock (Data->StateLock);\r | |
104 | \r | |
105 | if (ProcessorState == CPU_STATE_BLOCKED) {\r | |
106 | *NextNumber = Number;\r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r | |
109 | }\r | |
110 | \r | |
111 | return EFI_NOT_FOUND;\r | |
112 | }\r | |
113 | \r | |
114 | \r | |
115 | \r | |
116 | \r | |
117 | /**\r | |
118 | This service retrieves the number of logical processor in the platform\r | |
119 | and the number of those logical processors that are enabled on this boot.\r | |
120 | This service may only be called from the BSP.\r | |
121 | \r | |
122 | This function is used to retrieve the following information:\r | |
123 | - The number of logical processors that are present in the system.\r | |
124 | - The number of enabled logical processors in the system at the instant\r | |
125 | this call is made.\r | |
126 | \r | |
127 | Because MP Service Protocol provides services to enable and disable processors\r | |
128 | dynamically, the number of enabled logical processors may vary during the\r | |
129 | course of a boot session.\r | |
130 | \r | |
131 | If this service is called from an AP, then EFI_DEVICE_ERROR is returned.\r | |
132 | If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then\r | |
133 | EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors\r | |
134 | is returned in NumberOfProcessors, the number of currently enabled processor\r | |
135 | is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.\r | |
136 | \r | |
137 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL\r | |
138 | instance.\r | |
139 | @param[out] NumberOfProcessors Pointer to the total number of logical\r | |
140 | processors in the system, including the BSP\r | |
141 | and disabled APs.\r | |
142 | @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical\r | |
143 | processors that exist in system, including\r | |
144 | the BSP.\r | |
145 | \r | |
146 | @retval EFI_SUCCESS The number of logical processors and enabled\r | |
147 | logical processors was retrieved.\r | |
148 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
149 | @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.\r | |
150 | @retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.\r | |
151 | \r | |
152 | **/\r | |
153 | EFI_STATUS\r | |
154 | EFIAPI\r | |
155 | CpuMpServicesGetNumberOfProcessors (\r | |
156 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
157 | OUT UINTN *NumberOfProcessors,\r | |
158 | OUT UINTN *NumberOfEnabledProcessors\r | |
159 | )\r | |
160 | {\r | |
161 | if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {\r | |
162 | return EFI_INVALID_PARAMETER;\r | |
163 | }\r | |
164 | \r | |
165 | if (!IsBSP ()) {\r | |
166 | return EFI_DEVICE_ERROR;\r | |
167 | }\r | |
168 | \r | |
169 | *NumberOfProcessors = gMPSystem.NumberOfProcessors;\r | |
170 | *NumberOfEnabledProcessors = gMPSystem.NumberOfEnabledProcessors;\r | |
171 | return EFI_SUCCESS;\r | |
172 | }\r | |
173 | \r | |
174 | \r | |
175 | \r | |
176 | /**\r | |
177 | Gets detailed MP-related information on the requested processor at the\r | |
178 | instant this call is made. This service may only be called from the BSP.\r | |
179 | \r | |
180 | This service retrieves detailed MP-related information about any processor\r | |
181 | on the platform. Note the following:\r | |
182 | - The processor information may change during the course of a boot session.\r | |
183 | - The information presented here is entirely MP related.\r | |
184 | \r | |
185 | Information regarding the number of caches and their sizes, frequency of operation,\r | |
186 | slot numbers is all considered platform-related information and is not provided\r | |
187 | by this service.\r | |
188 | \r | |
189 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL\r | |
190 | instance.\r | |
191 | @param[in] ProcessorNumber The handle number of processor.\r | |
192 | @param[out] ProcessorInfoBuffer A pointer to the buffer where information for\r | |
193 | the requested processor is deposited.\r | |
194 | \r | |
195 | @retval EFI_SUCCESS Processor information was returned.\r | |
196 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
197 | @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.\r | |
198 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
199 | ProcessorNumber does not exist in the platform.\r | |
200 | \r | |
201 | **/\r | |
202 | EFI_STATUS\r | |
203 | EFIAPI\r | |
204 | CpuMpServicesGetProcessorInfo (\r | |
205 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
206 | IN UINTN ProcessorNumber,\r | |
207 | OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer\r | |
208 | )\r | |
209 | {\r | |
210 | if (ProcessorInfoBuffer == NULL) {\r | |
211 | return EFI_INVALID_PARAMETER;\r | |
212 | }\r | |
213 | \r | |
214 | if (!IsBSP ()) {\r | |
215 | return EFI_DEVICE_ERROR;\r | |
216 | }\r | |
217 | \r | |
218 | if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {\r | |
219 | return EFI_NOT_FOUND;\r | |
220 | }\r | |
221 | \r | |
222 | CopyMem (ProcessorInfoBuffer, &gMPSystem.ProcessorData[ProcessorNumber], sizeof (EFI_PROCESSOR_INFORMATION));\r | |
223 | return EFI_SUCCESS;\r | |
224 | }\r | |
225 | \r | |
226 | \r | |
227 | /**\r | |
228 | This service executes a caller provided function on all enabled APs. APs can\r | |
229 | run either simultaneously or one at a time in sequence. This service supports\r | |
230 | both blocking and non-blocking requests. The non-blocking requests use EFI\r | |
231 | events so the BSP can detect when the APs have finished. This service may only\r | |
232 | be called from the BSP.\r | |
233 | \r | |
234 | This function is used to dispatch all the enabled APs to the function specified\r | |
235 | by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned\r | |
236 | immediately and Procedure is not started on any AP.\r | |
237 | \r | |
238 | If SingleThread is TRUE, all the enabled APs execute the function specified by\r | |
239 | Procedure one by one, in ascending order of processor handle number. Otherwise,\r | |
240 | all the enabled APs execute the function specified by Procedure simultaneously.\r | |
241 | \r | |
242 | If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all\r | |
243 | APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking\r | |
244 | mode, and the BSP returns from this service without waiting for APs. If a\r | |
245 | non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT\r | |
246 | is signaled, then EFI_UNSUPPORTED must be returned.\r | |
247 | \r | |
248 | If the timeout specified by TimeoutInMicroseconds expires before all APs return\r | |
249 | from Procedure, then Procedure on the failed APs is terminated. All enabled APs\r | |
250 | are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()\r | |
251 | and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its\r | |
252 | content points to the list of processor handle numbers in which Procedure was\r | |
253 | terminated.\r | |
254 | \r | |
255 | Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()\r | |
256 | to make sure that the nature of the code that is executed on the BSP and the\r | |
257 | dispatched APs is well controlled. The MP Services Protocol does not guarantee\r | |
258 | that the Procedure function is MP-safe. Hence, the tasks that can be run in\r | |
259 | parallel are limited to certain independent tasks and well-controlled exclusive\r | |
260 | code. EFI services and protocols may not be called by APs unless otherwise\r | |
261 | specified.\r | |
262 | \r | |
263 | In blocking execution mode, BSP waits until all APs finish or\r | |
264 | TimeoutInMicroseconds expires.\r | |
265 | \r | |
266 | In non-blocking execution mode, BSP is freed to return to the caller and then\r | |
267 | proceed to the next task without having to wait for APs. The following\r | |
268 | sequence needs to occur in a non-blocking execution mode:\r | |
269 | \r | |
270 | -# The caller that intends to use this MP Services Protocol in non-blocking\r | |
271 | mode creates WaitEvent by calling the EFI CreateEvent() service. The caller\r | |
272 | invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent\r | |
273 | is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests\r | |
274 | the function specified by Procedure to be started on all the enabled APs,\r | |
275 | and releases the BSP to continue with other tasks.\r | |
276 | -# The caller can use the CheckEvent() and WaitForEvent() services to check\r | |
277 | the state of the WaitEvent created in step 1.\r | |
278 | -# When the APs complete their task or TimeoutInMicroSecondss expires, the MP\r | |
279 | Service signals WaitEvent by calling the EFI SignalEvent() function. If\r | |
280 | FailedCpuList is not NULL, its content is available when WaitEvent is\r | |
281 | signaled. If all APs returned from Procedure prior to the timeout, then\r | |
282 | FailedCpuList is set to NULL. If not all APs return from Procedure before\r | |
283 | the timeout, then FailedCpuList is filled in with the list of the failed\r | |
284 | APs. The buffer is allocated by MP Service Protocol using AllocatePool().\r | |
285 | It is the caller's responsibility to free the buffer with FreePool() service.\r | |
286 | -# This invocation of SignalEvent() function informs the caller that invoked\r | |
287 | EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed\r | |
288 | the specified task or a timeout occurred. The contents of FailedCpuList\r | |
289 | can be examined to determine which APs did not complete the specified task\r | |
290 | prior to the timeout.\r | |
291 | \r | |
292 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL\r | |
293 | instance.\r | |
294 | @param[in] Procedure A pointer to the function to be run on\r | |
295 | enabled APs of the system. See type\r | |
296 | EFI_AP_PROCEDURE.\r | |
297 | @param[in] SingleThread If TRUE, then all the enabled APs execute\r | |
298 | the function specified by Procedure one by\r | |
299 | one, in ascending order of processor handle\r | |
300 | number. If FALSE, then all the enabled APs\r | |
301 | execute the function specified by Procedure\r | |
302 | simultaneously.\r | |
303 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
304 | service. If it is NULL, then execute in\r | |
305 | blocking mode. BSP waits until all APs finish\r | |
306 | or TimeoutInMicroseconds expires. If it's\r | |
307 | not NULL, then execute in non-blocking mode.\r | |
308 | BSP requests the function specified by\r | |
309 | Procedure to be started on all the enabled\r | |
310 | APs, and go on executing immediately. If\r | |
311 | all return from Procedure, or TimeoutInMicroseconds\r | |
312 | expires, this event is signaled. The BSP\r | |
313 | can use the CheckEvent() or WaitForEvent()\r | |
314 | services to check the state of event. Type\r | |
315 | EFI_EVENT is defined in CreateEvent() in\r | |
316 | the Unified Extensible Firmware Interface\r | |
317 | Specification.\r | |
318 | @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for\r | |
319 | APs to return from Procedure, either for\r | |
320 | blocking or non-blocking mode. Zero means\r | |
321 | infinity. If the timeout expires before\r | |
322 | all APs return from Procedure, then Procedure\r | |
323 | on the failed APs is terminated. All enabled\r | |
324 | APs are available for next function assigned\r | |
325 | by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()\r | |
326 | or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().\r | |
327 | If the timeout expires in blocking mode,\r | |
328 | BSP returns EFI_TIMEOUT. If the timeout\r | |
329 | expires in non-blocking mode, WaitEvent\r | |
330 | is signaled with SignalEvent().\r | |
331 | @param[in] ProcedureArgument The parameter passed into Procedure for\r | |
332 | all APs.\r | |
333 | @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,\r | |
334 | if all APs finish successfully, then its\r | |
335 | content is set to NULL. If not all APs\r | |
336 | finish before timeout expires, then its\r | |
337 | content is set to address of the buffer\r | |
338 | holding handle numbers of the failed APs.\r | |
339 | The buffer is allocated by MP Service Protocol,\r | |
340 | and it's the caller's responsibility to\r | |
341 | free the buffer with FreePool() service.\r | |
342 | In blocking mode, it is ready for consumption\r | |
343 | when the call returns. In non-blocking mode,\r | |
344 | it is ready when WaitEvent is signaled. The\r | |
345 | list of failed CPU is terminated by\r | |
346 | END_OF_CPU_LIST.\r | |
347 | \r | |
348 | @retval EFI_SUCCESS In blocking mode, all APs have finished before\r | |
349 | the timeout expired.\r | |
350 | @retval EFI_SUCCESS In non-blocking mode, function has been dispatched\r | |
351 | to all enabled APs.\r | |
352 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
353 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
354 | signaled.\r | |
355 | @retval EFI_DEVICE_ERROR Caller processor is AP.\r | |
356 | @retval EFI_NOT_STARTED No enabled APs exist in the system.\r | |
357 | @retval EFI_NOT_READY Any enabled APs are busy.\r | |
358 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
359 | all enabled APs have finished.\r | |
360 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
361 | \r | |
362 | **/\r | |
363 | EFI_STATUS\r | |
364 | EFIAPI\r | |
365 | CpuMpServicesStartupAllAps (\r | |
366 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
367 | IN EFI_AP_PROCEDURE Procedure,\r | |
368 | IN BOOLEAN SingleThread,\r | |
369 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
370 | IN UINTN TimeoutInMicroseconds,\r | |
371 | IN VOID *ProcedureArgument OPTIONAL,\r | |
372 | OUT UINTN **FailedCpuList OPTIONAL\r | |
373 | )\r | |
374 | {\r | |
375 | EFI_STATUS Status;\r | |
376 | PROCESSOR_DATA_BLOCK *ProcessorData;\r | |
377 | UINTN Number;\r | |
378 | UINTN NextNumber;\r | |
379 | PROCESSOR_STATE APInitialState;\r | |
380 | PROCESSOR_STATE ProcessorState;\r | |
381 | INTN Timeout;\r | |
382 | \r | |
383 | \r | |
384 | if (!IsBSP ()) {\r | |
385 | return EFI_DEVICE_ERROR;\r | |
386 | }\r | |
387 | \r | |
388 | if (gMPSystem.NumberOfProcessors == 1) {\r | |
389 | return EFI_NOT_STARTED;\r | |
390 | }\r | |
391 | \r | |
392 | if (Procedure == NULL) {\r | |
393 | return EFI_INVALID_PARAMETER;\r | |
394 | }\r | |
395 | \r | |
396 | if ((WaitEvent != NULL) && gReadToBoot) {\r | |
397 | return EFI_UNSUPPORTED;\r | |
398 | }\r | |
399 | \r | |
400 | \r | |
401 | if (FailedCpuList != NULL) {\r | |
402 | gMPSystem.FailedList = AllocatePool ((gMPSystem.NumberOfProcessors + 1) * sizeof (UINTN));\r | |
403 | if (gMPSystem.FailedList == NULL) {\r | |
404 | return EFI_OUT_OF_RESOURCES;\r | |
405 | }\r | |
406 | SetMemN (gMPSystem.FailedList, (gMPSystem.NumberOfProcessors + 1) * sizeof (UINTN), END_OF_CPU_LIST);\r | |
407 | gMPSystem.FailedListIndex = 0;\r | |
408 | *FailedCpuList = gMPSystem.FailedList;\r | |
409 | }\r | |
410 | \r | |
411 | Timeout = TimeoutInMicroseconds;\r | |
412 | \r | |
413 | ProcessorData = NULL;\r | |
414 | \r | |
415 | gMPSystem.FinishCount = 0;\r | |
416 | gMPSystem.StartCount = 0;\r | |
417 | gMPSystem.SingleThread = SingleThread;\r | |
418 | APInitialState = CPU_STATE_READY;\r | |
419 | \r | |
420 | for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {\r | |
421 | ProcessorData = &gMPSystem.ProcessorData[Number];\r | |
422 | \r | |
423 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
424 | // Skip BSP\r | |
425 | continue;\r | |
426 | }\r | |
427 | \r | |
428 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
429 | // Skip Disabled processors\r | |
430 | gMPSystem.FailedList[gMPSystem.FailedListIndex++] = Number;\r | |
431 | continue;\r | |
432 | }\r | |
433 | \r | |
434 | //\r | |
435 | // Get APs prepared, and put failing APs into FailedCpuList\r | |
436 | // if "SingleThread", only 1 AP will put to ready state, other AP will be put to ready\r | |
437 | // state 1 by 1, until the previous 1 finished its task\r | |
438 | // if not "SingleThread", all APs are put to ready state from the beginning\r | |
439 | //\r | |
440 | if (ProcessorData->State == CPU_STATE_IDLE) {\r | |
441 | gMPSystem.StartCount++;\r | |
442 | \r | |
443 | gThread->MutexLock (&ProcessorData->StateLock);\r | |
444 | ProcessorData->State = APInitialState;\r | |
445 | gThread->MutexUnlock (&ProcessorData->StateLock);\r | |
446 | \r | |
447 | if (SingleThread) {\r | |
448 | APInitialState = CPU_STATE_BLOCKED;\r | |
449 | }\r | |
450 | } else {\r | |
451 | return EFI_NOT_READY;\r | |
452 | }\r | |
453 | }\r | |
454 | \r | |
455 | if (WaitEvent != NULL) {\r | |
456 | for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {\r | |
457 | ProcessorData = &gMPSystem.ProcessorData[Number];\r | |
458 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
459 | // Skip BSP\r | |
460 | continue;\r | |
461 | }\r | |
462 | \r | |
463 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
464 | // Skip Disabled processors\r | |
465 | continue;\r | |
466 | }\r | |
467 | \r | |
468 | SetApProcedure (ProcessorData, Procedure, ProcedureArgument);\r | |
469 | }\r | |
470 | \r | |
471 | //\r | |
472 | // Save data into private data structure, and create timer to poll AP state before exiting\r | |
473 | //\r | |
474 | gMPSystem.Procedure = Procedure;\r | |
475 | gMPSystem.ProcedureArgument = ProcedureArgument;\r | |
476 | gMPSystem.WaitEvent = WaitEvent;\r | |
477 | gMPSystem.Timeout = TimeoutInMicroseconds;\r | |
478 | gMPSystem.TimeoutActive = (BOOLEAN)(TimeoutInMicroseconds != 0);\r | |
479 | Status = gBS->SetTimer (\r | |
480 | gMPSystem.CheckAllAPsEvent,\r | |
481 | TimerPeriodic,\r | |
482 | gPollInterval\r | |
483 | );\r | |
484 | return Status;\r | |
485 | \r | |
486 | }\r | |
487 | \r | |
488 | while (TRUE) {\r | |
489 | for (Number = 0; Number < gMPSystem.NumberOfProcessors; Number++) {\r | |
490 | ProcessorData = &gMPSystem.ProcessorData[Number];\r | |
491 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
492 | // Skip BSP\r | |
493 | continue;\r | |
494 | }\r | |
495 | \r | |
496 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
497 | // Skip Disabled processors\r | |
498 | continue;\r | |
499 | }\r | |
500 | \r | |
501 | gThread->MutexLock (ProcessorData->StateLock);\r | |
502 | ProcessorState = ProcessorData->State;\r | |
503 | gThread->MutexUnlock (ProcessorData->StateLock);\r | |
504 | \r | |
505 | switch (ProcessorState) {\r | |
506 | case CPU_STATE_READY:\r | |
507 | SetApProcedure (ProcessorData, Procedure, ProcedureArgument);\r | |
508 | break;\r | |
509 | \r | |
510 | case CPU_STATE_FINISHED:\r | |
511 | gMPSystem.FinishCount++;\r | |
512 | if (SingleThread) {\r | |
513 | Status = GetNextBlockedNumber (&NextNumber);\r | |
514 | if (!EFI_ERROR (Status)) {\r | |
515 | gMPSystem.ProcessorData[NextNumber].State = CPU_STATE_READY;\r | |
516 | }\r | |
517 | }\r | |
518 | \r | |
519 | ProcessorData->State = CPU_STATE_IDLE;\r | |
520 | break;\r | |
521 | \r | |
522 | default:\r | |
523 | break;\r | |
524 | }\r | |
525 | }\r | |
526 | \r | |
527 | if (gMPSystem.FinishCount == gMPSystem.StartCount) {\r | |
528 | Status = EFI_SUCCESS;\r | |
529 | goto Done;\r | |
530 | }\r | |
531 | \r | |
532 | if ((TimeoutInMicroseconds != 0) && (Timeout < 0)) {\r | |
533 | Status = EFI_TIMEOUT;\r | |
534 | goto Done;\r | |
535 | }\r | |
536 | \r | |
537 | gBS->Stall (gPollInterval);\r | |
538 | Timeout -= gPollInterval;\r | |
539 | }\r | |
540 | \r | |
541 | Done:\r | |
542 | if (FailedCpuList != NULL) {\r | |
543 | if (gMPSystem.FailedListIndex == 0) {\r | |
544 | FreePool (*FailedCpuList);\r | |
545 | *FailedCpuList = NULL;\r | |
546 | }\r | |
547 | }\r | |
548 | \r | |
549 | return EFI_SUCCESS;\r | |
550 | }\r | |
551 | \r | |
552 | \r | |
553 | /**\r | |
554 | This service lets the caller get one enabled AP to execute a caller-provided\r | |
555 | function. The caller can request the BSP to either wait for the completion\r | |
556 | of the AP or just proceed with the next task by using the EFI event mechanism.\r | |
557 | See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking\r | |
558 | execution support. This service may only be called from the BSP.\r | |
559 | \r | |
560 | This function is used to dispatch one enabled AP to the function specified by\r | |
561 | Procedure passing in the argument specified by ProcedureArgument. If WaitEvent\r | |
562 | is NULL, execution is in blocking mode. The BSP waits until the AP finishes or\r | |
563 | TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.\r | |
564 | BSP proceeds to the next task without waiting for the AP. If a non-blocking mode\r | |
565 | is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,\r | |
566 | then EFI_UNSUPPORTED must be returned.\r | |
567 | \r | |
568 | If the timeout specified by TimeoutInMicroseconds expires before the AP returns\r | |
569 | from Procedure, then execution of Procedure by the AP is terminated. The AP is\r | |
570 | available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and\r | |
571 | EFI_MP_SERVICES_PROTOCOL.StartupThisAP().\r | |
572 | \r | |
573 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL\r | |
574 | instance.\r | |
575 | @param[in] Procedure A pointer to the function to be run on\r | |
576 | enabled APs of the system. See type\r | |
577 | EFI_AP_PROCEDURE.\r | |
578 | @param[in] ProcessorNumber The handle number of the AP. The range is\r | |
579 | from 0 to the total number of logical\r | |
580 | processors minus 1. The total number of\r | |
581 | logical processors can be retrieved by\r | |
582 | EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().\r | |
583 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
584 | service. If it is NULL, then execute in\r | |
585 | blocking mode. BSP waits until all APs finish\r | |
586 | or TimeoutInMicroseconds expires. If it's\r | |
587 | not NULL, then execute in non-blocking mode.\r | |
588 | BSP requests the function specified by\r | |
589 | Procedure to be started on all the enabled\r | |
590 | APs, and go on executing immediately. If\r | |
591 | all return from Procedure or TimeoutInMicroseconds\r | |
592 | expires, this event is signaled. The BSP\r | |
593 | can use the CheckEvent() or WaitForEvent()\r | |
594 | services to check the state of event. Type\r | |
595 | EFI_EVENT is defined in CreateEvent() in\r | |
596 | the Unified Extensible Firmware Interface\r | |
597 | Specification.\r | |
598 | @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for\r | |
599 | APs to return from Procedure, either for\r | |
600 | blocking or non-blocking mode. Zero means\r | |
601 | infinity. If the timeout expires before\r | |
602 | all APs return from Procedure, then Procedure\r | |
603 | on the failed APs is terminated. All enabled\r | |
604 | APs are available for next function assigned\r | |
605 | by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()\r | |
606 | or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().\r | |
607 | If the timeout expires in blocking mode,\r | |
608 | BSP returns EFI_TIMEOUT. If the timeout\r | |
609 | expires in non-blocking mode, WaitEvent\r | |
610 | is signaled with SignalEvent().\r | |
611 | @param[in] ProcedureArgument The parameter passed into Procedure for\r | |
612 | all APs.\r | |
613 | @param[out] Finished If NULL, this parameter is ignored. In\r | |
614 | blocking mode, this parameter is ignored.\r | |
615 | In non-blocking mode, if AP returns from\r | |
616 | Procedure before the timeout expires, its\r | |
617 | content is set to TRUE. Otherwise, the\r | |
618 | value is set to FALSE. The caller can\r | |
619 | determine if the AP returned from Procedure\r | |
620 | by evaluating this value.\r | |
621 | \r | |
622 | @retval EFI_SUCCESS In blocking mode, specified AP finished before\r | |
623 | the timeout expires.\r | |
624 | @retval EFI_SUCCESS In non-blocking mode, the function has been\r | |
625 | dispatched to specified AP.\r | |
626 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
627 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
628 | signaled.\r | |
629 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
630 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
631 | the specified AP has finished.\r | |
632 | @retval EFI_NOT_READY The specified AP is busy.\r | |
633 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
634 | ProcessorNumber does not exist.\r | |
635 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.\r | |
636 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
637 | \r | |
638 | **/\r | |
639 | EFI_STATUS\r | |
640 | EFIAPI\r | |
641 | CpuMpServicesStartupThisAP (\r | |
642 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
643 | IN EFI_AP_PROCEDURE Procedure,\r | |
644 | IN UINTN ProcessorNumber,\r | |
645 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
646 | IN UINTN TimeoutInMicroseconds,\r | |
647 | IN VOID *ProcedureArgument OPTIONAL,\r | |
648 | OUT BOOLEAN *Finished OPTIONAL\r | |
649 | )\r | |
650 | {\r | |
651 | INTN Timeout;\r | |
652 | \r | |
653 | if (!IsBSP ()) {\r | |
654 | return EFI_DEVICE_ERROR;\r | |
655 | }\r | |
656 | \r | |
657 | if (Procedure == NULL) {\r | |
658 | return EFI_INVALID_PARAMETER;\r | |
659 | }\r | |
660 | \r | |
661 | if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {\r | |
662 | return EFI_NOT_FOUND;\r | |
663 | }\r | |
664 | \r | |
665 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {\r | |
666 | return EFI_INVALID_PARAMETER;\r | |
667 | }\r | |
668 | \r | |
669 | if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {\r | |
670 | return EFI_NOT_READY;\r | |
671 | }\r | |
672 | \r | |
673 | if ((WaitEvent != NULL) && gReadToBoot) {\r | |
674 | return EFI_UNSUPPORTED;\r | |
675 | }\r | |
676 | \r | |
677 | Timeout = TimeoutInMicroseconds;\r | |
678 | \r | |
679 | gMPSystem.StartCount = 1;\r | |
680 | gMPSystem.FinishCount = 0;\r | |
681 | \r | |
682 | SetApProcedure (&gMPSystem.ProcessorData[ProcessorNumber], Procedure, ProcedureArgument);\r | |
683 | \r | |
684 | if (WaitEvent != NULL) {\r | |
685 | // Non Blocking\r | |
686 | gMPSystem.WaitEvent = WaitEvent;\r | |
687 | gBS->SetTimer (\r | |
688 | gMPSystem.ProcessorData[ProcessorNumber].CheckThisAPEvent,\r | |
689 | TimerPeriodic,\r | |
690 | gPollInterval\r | |
691 | );\r | |
692 | return EFI_SUCCESS;\r | |
693 | }\r | |
694 | \r | |
695 | // Blocking\r | |
696 | while (TRUE) {\r | |
697 | gThread->MutexLock (&gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
698 | if (gMPSystem.ProcessorData[ProcessorNumber].State == CPU_STATE_FINISHED) {\r | |
699 | gMPSystem.ProcessorData[ProcessorNumber].State = CPU_STATE_IDLE;\r | |
700 | gThread->MutexUnlock (&gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
701 | break;\r | |
702 | }\r | |
703 | \r | |
704 | gThread->MutexUnlock (&gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
705 | \r | |
706 | if ((TimeoutInMicroseconds != 0) && (Timeout < 0)) {\r | |
707 | return EFI_TIMEOUT;\r | |
708 | }\r | |
709 | \r | |
710 | gBS->Stall (gPollInterval);\r | |
711 | Timeout -= gPollInterval;\r | |
712 | }\r | |
713 | \r | |
714 | return EFI_SUCCESS;\r | |
715 | \r | |
716 | }\r | |
717 | \r | |
718 | \r | |
719 | /**\r | |
720 | This service switches the requested AP to be the BSP from that point onward.\r | |
721 | This service changes the BSP for all purposes. This call can only be performed\r | |
722 | by the current BSP.\r | |
723 | \r | |
724 | This service switches the requested AP to be the BSP from that point onward.\r | |
725 | This service changes the BSP for all purposes. The new BSP can take over the\r | |
726 | execution of the old BSP and continue seamlessly from where the old one left\r | |
727 | off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT\r | |
728 | is signaled.\r | |
729 | \r | |
730 | If the BSP cannot be switched prior to the return from this service, then\r | |
731 | EFI_UNSUPPORTED must be returned.\r | |
732 | \r | |
733 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.\r | |
734 | @param[in] ProcessorNumber The handle number of AP that is to become the new\r | |
735 | BSP. The range is from 0 to the total number of\r | |
736 | logical processors minus 1. The total number of\r | |
737 | logical processors can be retrieved by\r | |
738 | EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().\r | |
739 | @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an\r | |
740 | enabled AP. Otherwise, it will be disabled.\r | |
741 | \r | |
742 | @retval EFI_SUCCESS BSP successfully switched.\r | |
743 | @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to\r | |
744 | this service returning.\r | |
745 | @retval EFI_UNSUPPORTED Switching the BSP is not supported.\r | |
746 | @retval EFI_SUCCESS The calling processor is an AP.\r | |
747 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
748 | ProcessorNumber does not exist.\r | |
749 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or\r | |
750 | a disabled AP.\r | |
751 | @retval EFI_NOT_READY The specified AP is busy.\r | |
752 | \r | |
753 | **/\r | |
754 | EFI_STATUS\r | |
755 | EFIAPI\r | |
756 | CpuMpServicesSwitchBSP (\r | |
757 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
758 | IN UINTN ProcessorNumber,\r | |
759 | IN BOOLEAN EnableOldBSP\r | |
760 | )\r | |
761 | {\r | |
762 | UINTN Index;\r | |
763 | \r | |
764 | if (!IsBSP ()) {\r | |
765 | return EFI_DEVICE_ERROR;\r | |
766 | }\r | |
767 | \r | |
768 | if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {\r | |
769 | return EFI_NOT_FOUND;\r | |
770 | }\r | |
771 | \r | |
772 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
773 | return EFI_INVALID_PARAMETER;\r | |
774 | }\r | |
775 | \r | |
776 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {\r | |
777 | return EFI_INVALID_PARAMETER;\r | |
778 | }\r | |
779 | \r | |
780 | for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {\r | |
781 | if ((gMPSystem.ProcessorData[Index].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {\r | |
782 | break;\r | |
783 | }\r | |
784 | }\r | |
785 | ASSERT (Index != gMPSystem.NumberOfProcessors);\r | |
786 | \r | |
787 | if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {\r | |
788 | return EFI_NOT_READY;\r | |
789 | }\r | |
790 | \r | |
791 | // Skip for now as we need switch a bunch of stack stuff around and it's complex\r | |
792 | // May not be worth it?\r | |
793 | return EFI_NOT_READY;\r | |
794 | }\r | |
795 | \r | |
796 | \r | |
797 | /**\r | |
798 | This service lets the caller enable or disable an AP from this point onward.\r | |
799 | This service may only be called from the BSP.\r | |
800 | \r | |
801 | This service allows the caller enable or disable an AP from this point onward.\r | |
802 | The caller can optionally specify the health status of the AP by Health. If\r | |
803 | an AP is being disabled, then the state of the disabled AP is implementation\r | |
804 | dependent. If an AP is enabled, then the implementation must guarantee that a\r | |
805 | complete initialization sequence is performed on the AP, so the AP is in a state\r | |
806 | that is compatible with an MP operating system. This service may not be supported\r | |
807 | after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.\r | |
808 | \r | |
809 | If the enable or disable AP operation cannot be completed prior to the return\r | |
810 | from this service, then EFI_UNSUPPORTED must be returned.\r | |
811 | \r | |
812 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.\r | |
813 | @param[in] ProcessorNumber The handle number of AP that is to become the new\r | |
814 | BSP. The range is from 0 to the total number of\r | |
815 | logical processors minus 1. The total number of\r | |
816 | logical processors can be retrieved by\r | |
817 | EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().\r | |
818 | @param[in] EnableAP Specifies the new state for the processor for\r | |
819 | enabled, FALSE for disabled.\r | |
820 | @param[in] HealthFlag If not NULL, a pointer to a value that specifies\r | |
821 | the new health status of the AP. This flag\r | |
822 | corresponds to StatusFlag defined in\r | |
823 | EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only\r | |
824 | the PROCESSOR_HEALTH_STATUS_BIT is used. All other\r | |
825 | bits are ignored. If it is NULL, this parameter\r | |
826 | is ignored.\r | |
827 | \r | |
828 | @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.\r | |
829 | @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed\r | |
830 | prior to this service returning.\r | |
831 | @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.\r | |
832 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
833 | @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber\r | |
834 | does not exist.\r | |
835 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.\r | |
836 | \r | |
837 | **/\r | |
838 | EFI_STATUS\r | |
839 | EFIAPI\r | |
840 | CpuMpServicesEnableDisableAP (\r | |
841 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
842 | IN UINTN ProcessorNumber,\r | |
843 | IN BOOLEAN EnableAP,\r | |
844 | IN UINT32 *HealthFlag OPTIONAL\r | |
845 | )\r | |
846 | {\r | |
847 | if (!IsBSP ()) {\r | |
848 | return EFI_DEVICE_ERROR;\r | |
849 | }\r | |
850 | \r | |
851 | if (ProcessorNumber >= gMPSystem.NumberOfProcessors) {\r | |
852 | return EFI_NOT_FOUND;\r | |
853 | }\r | |
854 | \r | |
855 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) != 0) {\r | |
856 | return EFI_INVALID_PARAMETER;\r | |
857 | }\r | |
858 | \r | |
859 | if (gMPSystem.ProcessorData[ProcessorNumber].State != CPU_STATE_IDLE) {\r | |
860 | return EFI_UNSUPPORTED;\r | |
861 | }\r | |
862 | \r | |
863 | gThread->MutexLock (&gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
864 | \r | |
865 | if (EnableAP) {\r | |
866 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0 ) {\r | |
867 | gMPSystem.NumberOfEnabledProcessors++;\r | |
868 | }\r | |
869 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= PROCESSOR_ENABLED_BIT;\r | |
870 | } else {\r | |
871 | if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == PROCESSOR_ENABLED_BIT ) {\r | |
872 | gMPSystem.NumberOfEnabledProcessors--;\r | |
873 | }\r | |
874 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag &= ~PROCESSOR_ENABLED_BIT;\r | |
875 | }\r | |
876 | \r | |
877 | if (HealthFlag != NULL) {\r | |
878 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag &= ~PROCESSOR_HEALTH_STATUS_BIT;\r | |
879 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= (*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT);\r | |
880 | }\r | |
881 | \r | |
882 | gThread->MutexUnlock (&gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
883 | \r | |
884 | return EFI_SUCCESS;\r | |
885 | }\r | |
886 | \r | |
887 | \r | |
888 | /**\r | |
889 | This return the handle number for the calling processor. This service may be\r | |
890 | called from the BSP and APs.\r | |
891 | \r | |
892 | This service returns the processor handle number for the calling processor.\r | |
893 | The returned value is in the range from 0 to the total number of logical\r | |
894 | processors minus 1. The total number of logical processors can be retrieved\r | |
895 | with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be\r | |
896 | called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER\r | |
897 | is returned. Otherwise, the current processors handle number is returned in\r | |
898 | ProcessorNumber, and EFI_SUCCESS is returned.\r | |
899 | \r | |
900 | @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.\r | |
901 | @param[in] ProcessorNumber The handle number of AP that is to become the new\r | |
902 | BSP. The range is from 0 to the total number of\r | |
903 | logical processors minus 1. The total number of\r | |
904 | logical processors can be retrieved by\r | |
905 | EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().\r | |
906 | \r | |
907 | @retval EFI_SUCCESS The current processor handle number was returned\r | |
908 | in ProcessorNumber.\r | |
909 | @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.\r | |
910 | \r | |
911 | **/\r | |
912 | EFI_STATUS\r | |
913 | EFIAPI\r | |
914 | CpuMpServicesWhoAmI (\r | |
915 | IN EFI_MP_SERVICES_PROTOCOL *This,\r | |
916 | OUT UINTN *ProcessorNumber\r | |
917 | )\r | |
918 | {\r | |
919 | UINTN Index;\r | |
920 | UINT64 ProcessorId;\r | |
921 | \r | |
922 | if (ProcessorNumber == NULL) {\r | |
923 | return EFI_INVALID_PARAMETER;\r | |
924 | }\r | |
925 | \r | |
926 | ProcessorId = gThread->Self ();\r | |
927 | for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {\r | |
928 | if (gMPSystem.ProcessorData[Index].Info.ProcessorId == ProcessorId) {\r | |
929 | break;\r | |
930 | }\r | |
931 | }\r | |
932 | \r | |
933 | *ProcessorNumber = Index;\r | |
934 | return EFI_SUCCESS;\r | |
935 | }\r | |
936 | \r | |
937 | \r | |
938 | \r | |
939 | EFI_MP_SERVICES_PROTOCOL mMpSercicesTemplate = {\r | |
940 | CpuMpServicesGetNumberOfProcessors,\r | |
941 | CpuMpServicesGetProcessorInfo,\r | |
942 | CpuMpServicesStartupAllAps,\r | |
943 | CpuMpServicesStartupThisAP,\r | |
944 | CpuMpServicesSwitchBSP,\r | |
945 | CpuMpServicesEnableDisableAP,\r | |
946 | CpuMpServicesWhoAmI\r | |
947 | };\r | |
948 | \r | |
949 | \r | |
950 | \r | |
951 | /*++\r | |
952 | If timeout occurs in StartupAllAps(), a timer is set, which invokes this\r | |
953 | procedure periodically to check whether all APs have finished.\r | |
954 | \r | |
955 | \r | |
956 | --*/\r | |
957 | VOID\r | |
958 | EFIAPI\r | |
959 | CpuCheckAllAPsStatus (\r | |
960 | IN EFI_EVENT Event,\r | |
961 | IN VOID *Context\r | |
962 | )\r | |
963 | {\r | |
964 | UINTN ProcessorNumber;\r | |
965 | UINTN NextNumber;\r | |
966 | PROCESSOR_DATA_BLOCK *ProcessorData;\r | |
967 | PROCESSOR_DATA_BLOCK *NextData;\r | |
968 | EFI_STATUS Status;\r | |
969 | PROCESSOR_STATE ProcessorState;\r | |
970 | UINTN Cpu;\r | |
971 | BOOLEAN Found;\r | |
972 | \r | |
973 | if (gMPSystem.TimeoutActive) {\r | |
974 | gMPSystem.Timeout -= gPollInterval;\r | |
975 | }\r | |
976 | \r | |
977 | ProcessorData = (PROCESSOR_DATA_BLOCK *) Context;\r | |
978 | \r | |
979 | for (ProcessorNumber = 0; ProcessorNumber < gMPSystem.NumberOfProcessors; ProcessorNumber++) {\r | |
980 | if ((ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
981 | // Skip BSP\r | |
982 | continue;\r | |
983 | }\r | |
984 | \r | |
985 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
986 | // Skip Disabled processors\r | |
987 | continue;\r | |
988 | }\r | |
989 | \r | |
990 | // This is an Interrupt Service routine.\r | |
991 | // This can grab a lock that is held in a non-interrupt\r | |
992 | // context. Meaning deadlock. Which is a bad thing.\r | |
993 | // So, try lock it. If we can get it, cool, do our thing.\r | |
994 | // otherwise, just dump out & try again on the next iteration.\r | |
995 | Status = gThread->MutexTryLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
996 | if (EFI_ERROR(Status)) {\r | |
997 | return;\r | |
998 | }\r | |
999 | ProcessorState = gMPSystem.ProcessorData[ProcessorNumber].State;\r | |
1000 | gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
1001 | \r | |
1002 | switch (ProcessorState) {\r | |
1003 | case CPU_STATE_READY:\r | |
1004 | SetApProcedure (ProcessorData, gMPSystem.Procedure, gMPSystem.ProcedureArgument);\r | |
1005 | break;\r | |
1006 | \r | |
1007 | case CPU_STATE_FINISHED:\r | |
1008 | if (gMPSystem.SingleThread) {\r | |
1009 | Status = GetNextBlockedNumber (&NextNumber);\r | |
1010 | if (!EFI_ERROR (Status)) {\r | |
1011 | NextData = &gMPSystem.ProcessorData[NextNumber];\r | |
1012 | \r | |
1013 | gThread->MutexLock (&NextData->ProcedureLock);\r | |
1014 | NextData->State = CPU_STATE_READY;\r | |
1015 | gThread->MutexUnlock (&NextData->ProcedureLock);\r | |
1016 | \r | |
1017 | SetApProcedure (NextData, gMPSystem.Procedure, gMPSystem.ProcedureArgument);\r | |
1018 | }\r | |
1019 | }\r | |
1020 | \r | |
1021 | gMPSystem.ProcessorData[ProcessorNumber].State = CPU_STATE_IDLE;\r | |
1022 | gMPSystem.FinishCount++;\r | |
1023 | break;\r | |
1024 | \r | |
1025 | default:\r | |
1026 | break;\r | |
1027 | }\r | |
1028 | }\r | |
1029 | \r | |
1030 | if (gMPSystem.TimeoutActive && gMPSystem.Timeout < 0) {\r | |
1031 | //\r | |
1032 | // Timeout\r | |
1033 | //\r | |
1034 | if (gMPSystem.FailedList != NULL) {\r | |
1035 | for (ProcessorNumber = 0; ProcessorNumber < gMPSystem.NumberOfProcessors; ProcessorNumber++) {\r | |
1036 | if ((ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
1037 | // Skip BSP\r | |
1038 | continue;\r | |
1039 | }\r | |
1040 | \r | |
1041 | if ((ProcessorData->Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0) {\r | |
1042 | // Skip Disabled processors\r | |
1043 | continue;\r | |
1044 | }\r | |
1045 | \r | |
1046 | // Mark the\r | |
1047 | Status = gThread->MutexTryLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
1048 | if (EFI_ERROR(Status)) {\r | |
1049 | return;\r | |
1050 | }\r | |
1051 | ProcessorState = gMPSystem.ProcessorData[ProcessorNumber].State;\r | |
1052 | gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);\r | |
1053 | \r | |
1054 | if (ProcessorState != CPU_STATE_IDLE) {\r | |
1055 | // If we are retrying make sure we don't double count\r | |
1056 | for (Cpu = 0, Found = FALSE; Cpu < gMPSystem.NumberOfProcessors; Cpu++) {\r | |
1057 | if (gMPSystem.FailedList[Cpu] == END_OF_CPU_LIST) {\r | |
1058 | break;\r | |
1059 | }\r | |
1060 | if (gMPSystem.FailedList[ProcessorNumber] == Cpu) {\r | |
1061 | Found = TRUE;\r | |
1062 | break;\r | |
1063 | }\r | |
1064 | }\r | |
1065 | if (!Found) {\r | |
1066 | gMPSystem.FailedList[gMPSystem.FailedListIndex++] = Cpu;\r | |
1067 | }\r | |
1068 | }\r | |
1069 | }\r | |
1070 | }\r | |
1071 | // Force terminal exit\r | |
1072 | gMPSystem.FinishCount = gMPSystem.StartCount;\r | |
1073 | }\r | |
1074 | \r | |
1075 | if (gMPSystem.FinishCount != gMPSystem.StartCount) {\r | |
1076 | return;\r | |
1077 | }\r | |
1078 | \r | |
1079 | gBS->SetTimer (\r | |
1080 | gMPSystem.CheckAllAPsEvent,\r | |
1081 | TimerCancel,\r | |
1082 | 0\r | |
1083 | );\r | |
1084 | \r | |
1085 | if (gMPSystem.FailedListIndex == 0) {\r | |
1086 | if (gMPSystem.FailedList != NULL) {\r | |
1087 | FreePool (gMPSystem.FailedList);\r | |
1088 | gMPSystem.FailedList = NULL;\r | |
1089 | }\r | |
1090 | }\r | |
1091 | \r | |
1092 | Status = gBS->SignalEvent (gMPSystem.WaitEvent);\r | |
1093 | \r | |
1094 | return ;\r | |
1095 | }\r | |
1096 | \r | |
1097 | VOID\r | |
1098 | EFIAPI\r | |
1099 | CpuCheckThisAPStatus (\r | |
1100 | IN EFI_EVENT Event,\r | |
1101 | IN VOID *Context\r | |
1102 | )\r | |
1103 | {\r | |
1104 | EFI_STATUS Status;\r | |
1105 | PROCESSOR_DATA_BLOCK *ProcessorData;\r | |
1106 | PROCESSOR_STATE ProcessorState;\r | |
1107 | \r | |
1108 | ProcessorData = (PROCESSOR_DATA_BLOCK *) Context;\r | |
1109 | \r | |
1110 | //\r | |
1111 | // This is an Interrupt Service routine.\r | |
1112 | // that can grab a lock that is held in a non-interrupt\r | |
1113 | // context. Meaning deadlock. Which is a badddd thing.\r | |
1114 | // So, try lock it. If we can get it, cool, do our thing.\r | |
1115 | // otherwise, just dump out & try again on the next iteration.\r | |
1116 | //\r | |
1117 | Status = gThread->MutexTryLock (ProcessorData->StateLock);\r | |
1118 | if (EFI_ERROR(Status)) {\r | |
1119 | return;\r | |
1120 | }\r | |
1121 | ProcessorState = ProcessorData->State;\r | |
1122 | gThread->MutexUnlock (ProcessorData->StateLock);\r | |
1123 | \r | |
1124 | if (ProcessorState == CPU_STATE_FINISHED) {\r | |
1125 | Status = gBS->SetTimer (ProcessorData->CheckThisAPEvent, TimerCancel, 0);\r | |
1126 | ASSERT_EFI_ERROR (Status);\r | |
1127 | \r | |
1128 | Status = gBS->SignalEvent (gMPSystem.WaitEvent);\r | |
1129 | ASSERT_EFI_ERROR (Status);\r | |
1130 | \r | |
1131 | gThread->MutexLock (ProcessorData->StateLock);\r | |
1132 | ProcessorData->State = CPU_STATE_IDLE;\r | |
1133 | gThread->MutexUnlock (ProcessorData->StateLock);\r | |
1134 | }\r | |
1135 | \r | |
1136 | return ;\r | |
1137 | }\r | |
1138 | \r | |
1139 | \r | |
1140 | /*++\r | |
1141 | This function is called by all processors (both BSP and AP) once and collects MP related data\r | |
1142 | \r | |
1143 | MPSystemData - Pointer to the data structure containing MP related data\r | |
1144 | BSP - TRUE if the CPU is BSP\r | |
1145 | \r | |
1146 | EFI_SUCCESS - Data for the processor collected and filled in\r | |
1147 | \r | |
1148 | --*/\r | |
1149 | EFI_STATUS\r | |
1150 | FillInProcessorInformation (\r | |
1151 | IN BOOLEAN BSP,\r | |
1152 | IN UINTN ProcessorNumber\r | |
1153 | )\r | |
1154 | {\r | |
1155 | gMPSystem.ProcessorData[ProcessorNumber].Info.ProcessorId = gThread->Self ();\r | |
1156 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag = PROCESSOR_ENABLED_BIT | PROCESSOR_HEALTH_STATUS_BIT;\r | |
1157 | if (BSP) {\r | |
1158 | gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= PROCESSOR_AS_BSP_BIT;\r | |
1159 | }\r | |
1160 | \r | |
1161 | gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Package = ProcessorNumber;\r | |
1162 | gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Core = 0;\r | |
1163 | gMPSystem.ProcessorData[ProcessorNumber].Info.Location.Thread = 0;\r | |
1164 | gMPSystem.ProcessorData[ProcessorNumber].State = BSP ? CPU_STATE_BUSY : CPU_STATE_IDLE;\r | |
1165 | \r | |
1166 | gMPSystem.ProcessorData[ProcessorNumber].Procedure = NULL;\r | |
1167 | gMPSystem.ProcessorData[ProcessorNumber].Parameter = NULL;\r | |
1168 | gMPSystem.ProcessorData[ProcessorNumber].StateLock = gThread->MutexInit ();\r | |
1169 | gMPSystem.ProcessorData[ProcessorNumber].ProcedureLock = gThread->MutexInit ();\r | |
1170 | \r | |
1171 | return EFI_SUCCESS;\r | |
1172 | }\r | |
1173 | \r | |
1174 | VOID *\r | |
1175 | EFIAPI\r | |
1176 | CpuDriverApIdolLoop (\r | |
1177 | VOID *Context\r | |
1178 | )\r | |
1179 | {\r | |
1180 | EFI_AP_PROCEDURE Procedure;\r | |
1181 | VOID *Parameter;\r | |
1182 | UINTN ProcessorNumber;\r | |
1183 | PROCESSOR_DATA_BLOCK *ProcessorData;\r | |
1184 | \r | |
1185 | ProcessorNumber = (UINTN)Context;\r | |
1186 | ProcessorData = &gMPSystem.ProcessorData[ProcessorNumber];\r | |
1187 | \r | |
1188 | ProcessorData->Info.ProcessorId = gThread->Self ();\r | |
1189 | \r | |
1190 | while (TRUE) {\r | |
1191 | //\r | |
1192 | // Make a local copy on the stack to be extra safe\r | |
1193 | //\r | |
1194 | gThread->MutexLock (ProcessorData->ProcedureLock);\r | |
1195 | Procedure = ProcessorData->Procedure;\r | |
1196 | Parameter = ProcessorData->Parameter;\r | |
1197 | gThread->MutexUnlock (ProcessorData->ProcedureLock);\r | |
1198 | \r | |
1199 | if (Procedure != NULL) {\r | |
1200 | gThread->MutexLock (ProcessorData->StateLock);\r | |
1201 | ProcessorData->State = CPU_STATE_BUSY;\r | |
1202 | gThread->MutexUnlock (ProcessorData->StateLock);\r | |
1203 | \r | |
1204 | Procedure (Parameter);\r | |
1205 | \r | |
1206 | gThread->MutexLock (ProcessorData->ProcedureLock);\r | |
1207 | ProcessorData->Procedure = NULL;\r | |
1208 | gThread->MutexUnlock (ProcessorData->ProcedureLock);\r | |
1209 | \r | |
1210 | gThread->MutexLock (ProcessorData->StateLock);\r | |
1211 | ProcessorData->State = CPU_STATE_FINISHED;\r | |
1212 | gThread->MutexUnlock (ProcessorData->StateLock);\r | |
1213 | }\r | |
1214 | \r | |
1215 | // Poll 5 times a seconds, 200ms\r | |
1216 | // Don't want to burn too many system resources doing nothing.\r | |
1217 | gEmuThunk->Sleep (200 * 1000);\r | |
1218 | }\r | |
1219 | \r | |
1220 | return 0;\r | |
1221 | }\r | |
1222 | \r | |
1223 | \r | |
1224 | EFI_STATUS\r | |
1225 | InitializeMpSystemData (\r | |
1226 | IN UINTN NumberOfProcessors\r | |
1227 | )\r | |
1228 | {\r | |
1229 | EFI_STATUS Status;\r | |
1230 | UINTN Index;\r | |
1231 | \r | |
1232 | \r | |
1233 | //\r | |
1234 | // Clear the data structure area first.\r | |
1235 | //\r | |
1236 | ZeroMem (&gMPSystem, sizeof (MP_SYSTEM_DATA));\r | |
1237 | \r | |
1238 | //\r | |
1239 | // First BSP fills and inits all known values, including it's own records.\r | |
1240 | //\r | |
1241 | gMPSystem.NumberOfProcessors = NumberOfProcessors;\r | |
1242 | gMPSystem.NumberOfEnabledProcessors = NumberOfProcessors;\r | |
1243 | \r | |
1244 | gMPSystem.ProcessorData = AllocateZeroPool (gMPSystem.NumberOfProcessors * sizeof (PROCESSOR_DATA_BLOCK));\r | |
1245 | ASSERT (gMPSystem.ProcessorData != NULL);\r | |
1246 | \r | |
1247 | FillInProcessorInformation (TRUE, 0);\r | |
1248 | \r | |
1249 | Status = gBS->CreateEvent (\r | |
1250 | EVT_TIMER | EVT_NOTIFY_SIGNAL,\r | |
1251 | TPL_CALLBACK,\r | |
1252 | CpuCheckAllAPsStatus,\r | |
1253 | NULL,\r | |
1254 | &gMPSystem.CheckAllAPsEvent\r | |
1255 | );\r | |
1256 | ASSERT_EFI_ERROR (Status);\r | |
1257 | \r | |
1258 | \r | |
1259 | for (Index = 0; Index < gMPSystem.NumberOfProcessors; Index++) {\r | |
1260 | if ((gMPSystem.ProcessorData[Index].Info.StatusFlag & PROCESSOR_AS_BSP_BIT) == PROCESSOR_AS_BSP_BIT) {\r | |
1261 | // Skip BSP\r | |
1262 | continue;\r | |
1263 | }\r | |
1264 | \r | |
1265 | FillInProcessorInformation (FALSE, Index);\r | |
1266 | \r | |
1267 | Status = gThread->CreateThread (\r | |
1268 | (VOID *)&gMPSystem.ProcessorData[Index].Info.ProcessorId,\r | |
1269 | NULL,\r | |
1270 | CpuDriverApIdolLoop,\r | |
1271 | (VOID *)Index\r | |
1272 | );\r | |
1273 | \r | |
1274 | \r | |
1275 | Status = gBS->CreateEvent (\r | |
1276 | EVT_TIMER | EVT_NOTIFY_SIGNAL,\r | |
1277 | TPL_CALLBACK,\r | |
1278 | CpuCheckThisAPStatus,\r | |
1279 | (VOID *) &gMPSystem.ProcessorData[Index],\r | |
1280 | &gMPSystem.ProcessorData[Index].CheckThisAPEvent\r | |
1281 | );\r | |
1282 | }\r | |
1283 | \r | |
1284 | return EFI_SUCCESS;\r | |
1285 | }\r | |
1286 | \r | |
1287 | \r | |
1288 | \r | |
1289 | /**\r | |
1290 | Invoke a notification event\r | |
1291 | \r | |
1292 | @param Event Event whose notification function is being invoked.\r | |
1293 | @param Context The pointer to the notification function's context,\r | |
1294 | which is implementation-dependent.\r | |
1295 | \r | |
1296 | **/\r | |
1297 | VOID\r | |
1298 | EFIAPI\r | |
1299 | CpuReadToBootFunction (\r | |
1300 | IN EFI_EVENT Event,\r | |
1301 | IN VOID *Context\r | |
1302 | )\r | |
1303 | {\r | |
1304 | gReadToBoot = TRUE;\r | |
1305 | }\r | |
1306 | \r | |
1307 | \r | |
1308 | \r | |
1309 | EFI_STATUS\r | |
1310 | CpuMpServicesInit (\r | |
1311 | OUT UINTN *MaxCpus\r | |
1312 | )\r | |
1313 | {\r | |
1314 | EFI_STATUS Status;\r | |
1315 | EFI_HANDLE Handle;\r | |
1316 | EMU_IO_THUNK_PROTOCOL *IoThunk;\r | |
1317 | \r | |
1318 | *MaxCpus = 1; // BSP\r | |
1319 | IoThunk = GetIoThunkInstance (&gEmuThreadThunkProtocolGuid, 0);\r | |
1320 | if (IoThunk != NULL) {\r | |
1321 | Status = IoThunk->Open (IoThunk);\r | |
1322 | if (!EFI_ERROR (Status)) {\r | |
1323 | if (IoThunk->ConfigString != NULL) {\r | |
1324 | *MaxCpus += StrDecimalToUintn (IoThunk->ConfigString);\r | |
1325 | gThread = IoThunk->Interface;\r | |
1326 | }\r | |
1327 | }\r | |
1328 | }\r | |
1329 | \r | |
1330 | if (*MaxCpus == 1) {\r | |
1331 | // We are not MP so nothing to do\r | |
1332 | return EFI_SUCCESS;\r | |
1333 | }\r | |
1334 | \r | |
1335 | gPollInterval = PcdGet64 (PcdEmuMpServicesPollingInterval);\r | |
1336 | \r | |
1337 | Status = InitializeMpSystemData (*MaxCpus);\r | |
1338 | if (EFI_ERROR (Status)) {\r | |
1339 | return Status;\r | |
1340 | }\r | |
1341 | \r | |
1342 | Status = EfiCreateEventReadyToBootEx (TPL_CALLBACK, CpuReadToBootFunction, NULL, &gReadToBootEvent);\r | |
1343 | ASSERT_EFI_ERROR (Status);\r | |
1344 | \r | |
1345 | //\r | |
1346 | // Now install the MP services protocol.\r | |
1347 | //\r | |
1348 | Handle = NULL;\r | |
1349 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1350 | &Handle,\r | |
1351 | &gEfiMpServiceProtocolGuid, &mMpSercicesTemplate,\r | |
1352 | NULL\r | |
1353 | );\r | |
1354 | return Status;\r | |
1355 | }\r | |
1356 | \r | |
1357 | \r |