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1 | /** @file\r |
2 | Implementation of Multiple Processor PPI services.\r | |
3 | \r | |
4 | Copyright (c) 2015, 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 "PeiMpServices.h"\r | |
16 | \r | |
17 | //\r | |
18 | // CPU MP PPI to be installed\r | |
19 | //\r | |
20 | EFI_PEI_MP_SERVICES_PPI mMpServicesPpi = {\r | |
21 | PeiGetNumberOfProcessors,\r | |
22 | PeiGetProcessorInfo,\r | |
23 | PeiStartupAllAPs,\r | |
24 | PeiStartupThisAP,\r | |
25 | PeiSwitchBSP,\r | |
26 | PeiEnableDisableAP,\r | |
27 | PeiWhoAmI,\r | |
28 | };\r | |
29 | \r | |
30 | EFI_PEI_PPI_DESCRIPTOR mPeiCpuMpPpiDesc = {\r | |
31 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
32 | &gEfiPeiMpServicesPpiGuid,\r | |
33 | &mMpServicesPpi\r | |
34 | };\r | |
35 | \r | |
36 | /**\r | |
37 | Get CPU Package/Core/Thread location information.\r | |
38 | \r | |
39 | @param InitialApicId CPU APIC ID\r | |
40 | @param Location Pointer to CPU location information\r | |
41 | **/\r | |
42 | VOID\r | |
43 | ExtractProcessorLocation (\r | |
44 | IN UINT32 InitialApicId,\r | |
45 | OUT EFI_CPU_PHYSICAL_LOCATION *Location\r | |
46 | )\r | |
47 | {\r | |
48 | BOOLEAN TopologyLeafSupported;\r | |
49 | UINTN ThreadBits;\r | |
50 | UINTN CoreBits;\r | |
51 | UINT32 RegEax;\r | |
52 | UINT32 RegEbx;\r | |
53 | UINT32 RegEcx;\r | |
54 | UINT32 RegEdx;\r | |
55 | UINT32 MaxCpuIdIndex;\r | |
56 | UINT32 SubIndex;\r | |
57 | UINTN LevelType;\r | |
58 | UINT32 MaxLogicProcessorsPerPackage;\r | |
59 | UINT32 MaxCoresPerPackage;\r | |
60 | \r | |
61 | //\r | |
62 | // Check if the processor is capable of supporting more than one logical processor.\r | |
63 | //\r | |
64 | AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &RegEdx);\r | |
65 | if ((RegEdx & BIT28) == 0) {\r | |
66 | Location->Thread = 0;\r | |
67 | Location->Core = 0;\r | |
68 | Location->Package = 0;\r | |
69 | return;\r | |
70 | }\r | |
71 | \r | |
72 | ThreadBits = 0;\r | |
73 | CoreBits = 0;\r | |
74 | \r | |
75 | //\r | |
76 | // Assume three-level mapping of APIC ID: Package:Core:SMT.\r | |
77 | //\r | |
78 | \r | |
79 | TopologyLeafSupported = FALSE;\r | |
80 | //\r | |
81 | // Get the max index of basic CPUID\r | |
82 | //\r | |
83 | AsmCpuid (CPUID_SIGNATURE, &MaxCpuIdIndex, NULL, NULL, NULL);\r | |
84 | \r | |
85 | //\r | |
86 | // If the extended topology enumeration leaf is available, it\r | |
87 | // is the preferred mechanism for enumerating topology.\r | |
88 | //\r | |
89 | if (MaxCpuIdIndex >= CPUID_EXTENDED_TOPOLOGY) {\r | |
90 | AsmCpuidEx (CPUID_EXTENDED_TOPOLOGY, 0, &RegEax, &RegEbx, &RegEcx, NULL);\r | |
91 | //\r | |
92 | // If CPUID.(EAX=0BH, ECX=0H):EBX returns zero and maximum input value for\r | |
93 | // basic CPUID information is greater than 0BH, then CPUID.0BH leaf is not\r | |
94 | // supported on that processor.\r | |
95 | //\r | |
96 | if (RegEbx != 0) {\r | |
97 | TopologyLeafSupported = TRUE;\r | |
98 | \r | |
99 | //\r | |
100 | // Sub-leaf index 0 (ECX= 0 as input) provides enumeration parameters to extract\r | |
101 | // the SMT sub-field of x2APIC ID.\r | |
102 | //\r | |
103 | LevelType = (RegEcx >> 8) & 0xff;\r | |
104 | ASSERT (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT);\r | |
105 | ThreadBits = RegEax & 0x1f;\r | |
106 | \r | |
107 | //\r | |
108 | // Software must not assume any "level type" encoding\r | |
109 | // value to be related to any sub-leaf index, except sub-leaf 0.\r | |
110 | //\r | |
111 | SubIndex = 1;\r | |
112 | do {\r | |
113 | AsmCpuidEx (CPUID_EXTENDED_TOPOLOGY, SubIndex, &RegEax, NULL, &RegEcx, NULL);\r | |
114 | LevelType = (RegEcx >> 8) & 0xff;\r | |
115 | if (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE) {\r | |
116 | CoreBits = (RegEax & 0x1f) - ThreadBits;\r | |
117 | break;\r | |
118 | }\r | |
119 | SubIndex++;\r | |
120 | } while (LevelType != CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID);\r | |
121 | }\r | |
122 | }\r | |
123 | \r | |
124 | if (!TopologyLeafSupported) {\r | |
125 | AsmCpuid (CPUID_VERSION_INFO, NULL, &RegEbx, NULL, NULL);\r | |
126 | MaxLogicProcessorsPerPackage = (RegEbx >> 16) & 0xff;\r | |
127 | if (MaxCpuIdIndex >= CPUID_CACHE_PARAMS) {\r | |
128 | AsmCpuidEx (CPUID_CACHE_PARAMS, 0, &RegEax, NULL, NULL, NULL);\r | |
129 | MaxCoresPerPackage = (RegEax >> 26) + 1;\r | |
130 | } else {\r | |
131 | //\r | |
132 | // Must be a single-core processor.\r | |
133 | //\r | |
134 | MaxCoresPerPackage = 1;\r | |
135 | }\r | |
136 | \r | |
137 | ThreadBits = (UINTN) (HighBitSet32 (MaxLogicProcessorsPerPackage / MaxCoresPerPackage - 1) + 1);\r | |
138 | CoreBits = (UINTN) (HighBitSet32 (MaxCoresPerPackage - 1) + 1);\r | |
139 | }\r | |
140 | \r | |
141 | Location->Thread = InitialApicId & ~((-1) << ThreadBits);\r | |
142 | Location->Core = (InitialApicId >> ThreadBits) & ~((-1) << CoreBits);\r | |
143 | Location->Package = (InitialApicId >> (ThreadBits + CoreBits));\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
147 | Find the current Processor number by APIC ID.\r | |
148 | \r | |
149 | @param PeiCpuMpData Pointer to PEI CPU MP Data\r | |
150 | @param ProcessorNumber Return the pocessor number found\r | |
151 | \r | |
152 | @retval EFI_SUCCESS ProcessorNumber is found and returned.\r | |
153 | @retval EFI_NOT_FOUND ProcessorNumber is not found.\r | |
154 | **/\r | |
155 | EFI_STATUS\r | |
156 | GetProcessorNumber (\r | |
157 | IN PEI_CPU_MP_DATA *PeiCpuMpData,\r | |
158 | OUT UINTN *ProcessorNumber\r | |
159 | )\r | |
160 | {\r | |
161 | UINTN TotalProcessorNumber;\r | |
162 | UINTN Index;\r | |
163 | \r | |
164 | TotalProcessorNumber = PeiCpuMpData->CpuCount;\r | |
165 | for (Index = 0; Index < TotalProcessorNumber; Index ++) {\r | |
166 | if (PeiCpuMpData->CpuData[Index].ApicId == GetInitialApicId ()) {\r | |
167 | *ProcessorNumber = Index;\r | |
168 | return EFI_SUCCESS;\r | |
169 | }\r | |
170 | }\r | |
171 | return EFI_NOT_FOUND;\r | |
172 | }\r | |
173 | \r | |
174 | /**\r | |
175 | Worker function for SwitchBSP().\r | |
176 | \r | |
177 | Worker function for SwitchBSP(), assigned to the AP which is intended to become BSP.\r | |
178 | \r | |
179 | @param Buffer Pointer to CPU MP Data\r | |
180 | **/\r | |
181 | VOID\r | |
182 | EFIAPI\r | |
183 | FutureBSPProc (\r | |
184 | IN VOID *Buffer\r | |
185 | )\r | |
186 | {\r | |
187 | PEI_CPU_MP_DATA *DataInHob;\r | |
188 | \r | |
189 | DataInHob = (PEI_CPU_MP_DATA *) Buffer;\r | |
190 | AsmExchangeRole (&DataInHob->APInfo, &DataInHob->BSPInfo);\r | |
191 | }\r | |
192 | \r | |
193 | /**\r | |
194 | This service retrieves the number of logical processor in the platform\r | |
195 | and the number of those logical processors that are enabled on this boot.\r | |
196 | This service may only be called from the BSP.\r | |
197 | \r | |
198 | This function is used to retrieve the following information:\r | |
199 | - The number of logical processors that are present in the system.\r | |
200 | - The number of enabled logical processors in the system at the instant\r | |
201 | this call is made.\r | |
202 | \r | |
203 | Because MP Service Ppi provides services to enable and disable processors\r | |
204 | dynamically, the number of enabled logical processors may vary during the\r | |
205 | course of a boot session.\r | |
206 | \r | |
207 | If this service is called from an AP, then EFI_DEVICE_ERROR is returned.\r | |
208 | If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then\r | |
209 | EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors\r | |
210 | is returned in NumberOfProcessors, the number of currently enabled processor\r | |
211 | is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.\r | |
212 | \r | |
213 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
214 | published by the PEI Foundation.\r | |
215 | @param[in] This Pointer to this instance of the PPI.\r | |
216 | @param[out] NumberOfProcessors Pointer to the total number of logical processors in\r | |
217 | the system, including the BSP and disabled APs.\r | |
218 | @param[out] NumberOfEnabledProcessors\r | |
219 | Number of processors in the system that are enabled.\r | |
220 | \r | |
221 | @retval EFI_SUCCESS The number of logical processors and enabled\r | |
222 | logical processors was retrieved.\r | |
223 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
224 | @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.\r | |
225 | NumberOfEnabledProcessors is NULL.\r | |
226 | **/\r | |
227 | EFI_STATUS\r | |
228 | EFIAPI\r | |
229 | PeiGetNumberOfProcessors (\r | |
230 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
231 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
232 | OUT UINTN *NumberOfProcessors,\r | |
233 | OUT UINTN *NumberOfEnabledProcessors\r | |
234 | )\r | |
235 | {\r | |
236 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
237 | UINTN CallerNumber;\r | |
238 | UINTN ProcessorNumber;\r | |
239 | UINTN EnabledProcessorNumber;\r | |
240 | UINTN Index;\r | |
241 | \r | |
242 | PeiCpuMpData = GetMpHobData ();\r | |
243 | if (PeiCpuMpData == NULL) {\r | |
244 | return EFI_NOT_FOUND;\r | |
245 | }\r | |
246 | \r | |
247 | if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {\r | |
248 | return EFI_INVALID_PARAMETER;\r | |
249 | }\r | |
250 | \r | |
251 | //\r | |
252 | // Check whether caller processor is BSP\r | |
253 | //\r | |
254 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
255 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
256 | return EFI_DEVICE_ERROR;\r | |
257 | }\r | |
258 | \r | |
259 | ProcessorNumber = PeiCpuMpData->CpuCount;\r | |
260 | EnabledProcessorNumber = 0;\r | |
261 | for (Index = 0; Index < ProcessorNumber; Index++) {\r | |
262 | if (PeiCpuMpData->CpuData[Index].State != CpuStateDisabled) {\r | |
263 | EnabledProcessorNumber ++;\r | |
264 | }\r | |
265 | }\r | |
266 | \r | |
267 | *NumberOfProcessors = ProcessorNumber;\r | |
268 | *NumberOfEnabledProcessors = EnabledProcessorNumber;\r | |
269 | \r | |
270 | return EFI_SUCCESS;\r | |
271 | }\r | |
272 | \r | |
273 | /**\r | |
274 | Gets detailed MP-related information on the requested processor at the\r | |
275 | instant this call is made. This service may only be called from the BSP.\r | |
276 | \r | |
277 | This service retrieves detailed MP-related information about any processor\r | |
278 | on the platform. Note the following:\r | |
279 | - The processor information may change during the course of a boot session.\r | |
280 | - The information presented here is entirely MP related.\r | |
281 | \r | |
282 | Information regarding the number of caches and their sizes, frequency of operation,\r | |
283 | slot numbers is all considered platform-related information and is not provided\r | |
284 | by this service.\r | |
285 | \r | |
286 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
287 | published by the PEI Foundation.\r | |
288 | @param[in] This Pointer to this instance of the PPI.\r | |
289 | @param[in] ProcessorNumber Pointer to the total number of logical processors in\r | |
290 | the system, including the BSP and disabled APs.\r | |
291 | @param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.\r | |
292 | \r | |
293 | @retval EFI_SUCCESS Processor information was returned.\r | |
294 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
295 | @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.\r | |
296 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
297 | ProcessorNumber does not exist in the platform.\r | |
298 | **/\r | |
299 | EFI_STATUS\r | |
300 | EFIAPI\r | |
301 | PeiGetProcessorInfo (\r | |
302 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
303 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
304 | IN UINTN ProcessorNumber,\r | |
305 | OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer\r | |
306 | )\r | |
307 | {\r | |
308 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
309 | UINTN CallerNumber;\r | |
310 | \r | |
311 | PeiCpuMpData = GetMpHobData ();\r | |
312 | if (PeiCpuMpData == NULL) {\r | |
313 | return EFI_NOT_FOUND;\r | |
314 | }\r | |
315 | \r | |
316 | //\r | |
317 | // Check whether caller processor is BSP\r | |
318 | //\r | |
319 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
320 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
321 | return EFI_DEVICE_ERROR;\r | |
322 | }\r | |
323 | \r | |
324 | if (ProcessorInfoBuffer == NULL) {\r | |
325 | return EFI_INVALID_PARAMETER;\r | |
326 | }\r | |
327 | \r | |
328 | if (ProcessorNumber >= PeiCpuMpData->CpuCount) {\r | |
329 | return EFI_NOT_FOUND;\r | |
330 | }\r | |
331 | \r | |
332 | ProcessorInfoBuffer->ProcessorId = (UINT64) PeiCpuMpData->CpuData[ProcessorNumber].ApicId;\r | |
333 | ProcessorInfoBuffer->StatusFlag = 0;\r | |
334 | if (PeiCpuMpData->CpuData[ProcessorNumber].ApicId == GetInitialApicId()) {\r | |
335 | ProcessorInfoBuffer->StatusFlag |= PROCESSOR_AS_BSP_BIT;\r | |
336 | }\r | |
337 | if (PeiCpuMpData->CpuData[ProcessorNumber].Health.Uint32 == 0) {\r | |
338 | ProcessorInfoBuffer->StatusFlag |= PROCESSOR_HEALTH_STATUS_BIT;\r | |
339 | }\r | |
340 | if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateDisabled) {\r | |
341 | ProcessorInfoBuffer->StatusFlag &= ~PROCESSOR_ENABLED_BIT;\r | |
342 | } else {\r | |
343 | ProcessorInfoBuffer->StatusFlag |= PROCESSOR_ENABLED_BIT;\r | |
344 | }\r | |
345 | \r | |
346 | //\r | |
347 | // Get processor location information\r | |
348 | //\r | |
349 | ExtractProcessorLocation (PeiCpuMpData->CpuData[ProcessorNumber].ApicId, &ProcessorInfoBuffer->Location);\r | |
350 | \r | |
351 | return EFI_SUCCESS;\r | |
352 | }\r | |
353 | \r | |
354 | /**\r | |
355 | This service executes a caller provided function on all enabled APs. APs can\r | |
356 | run either simultaneously or one at a time in sequence. This service supports\r | |
357 | both blocking requests only. This service may only\r | |
358 | be called from the BSP.\r | |
359 | \r | |
360 | This function is used to dispatch all the enabled APs to the function specified\r | |
361 | by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned\r | |
362 | immediately and Procedure is not started on any AP.\r | |
363 | \r | |
364 | If SingleThread is TRUE, all the enabled APs execute the function specified by\r | |
365 | Procedure one by one, in ascending order of processor handle number. Otherwise,\r | |
366 | all the enabled APs execute the function specified by Procedure simultaneously.\r | |
367 | \r | |
368 | If the timeout specified by TimeoutInMicroSeconds expires before all APs return\r | |
369 | from Procedure, then Procedure on the failed APs is terminated. All enabled APs\r | |
370 | are always available for further calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()\r | |
371 | and EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If FailedCpuList is not NULL, its\r | |
372 | content points to the list of processor handle numbers in which Procedure was\r | |
373 | terminated.\r | |
374 | \r | |
375 | Note: It is the responsibility of the consumer of the EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()\r | |
376 | to make sure that the nature of the code that is executed on the BSP and the\r | |
377 | dispatched APs is well controlled. The MP Services Ppi does not guarantee\r | |
378 | that the Procedure function is MP-safe. Hence, the tasks that can be run in\r | |
379 | parallel are limited to certain independent tasks and well-controlled exclusive\r | |
380 | code. PEI services and Ppis may not be called by APs unless otherwise\r | |
381 | specified.\r | |
382 | \r | |
383 | In blocking execution mode, BSP waits until all APs finish or\r | |
384 | TimeoutInMicroSeconds expires.\r | |
385 | \r | |
386 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
387 | published by the PEI Foundation.\r | |
388 | @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.\r | |
389 | @param[in] Procedure A pointer to the function to be run on enabled APs of\r | |
390 | the system.\r | |
391 | @param[in] SingleThread If TRUE, then all the enabled APs execute the function\r | |
392 | specified by Procedure one by one, in ascending order\r | |
393 | of processor handle number. If FALSE, then all the\r | |
394 | enabled APs execute the function specified by Procedure\r | |
395 | simultaneously.\r | |
396 | @param[in] TimeoutInMicroSeconds\r | |
397 | Indicates the time limit in microseconds for APs to\r | |
398 | return from Procedure, for blocking mode only. Zero\r | |
399 | means infinity. If the timeout expires before all APs\r | |
400 | return from Procedure, then Procedure on the failed APs\r | |
401 | is terminated. All enabled APs are available for next\r | |
402 | function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()\r | |
403 | or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the\r | |
404 | timeout expires in blocking mode, BSP returns\r | |
405 | EFI_TIMEOUT.\r | |
406 | @param[in] ProcedureArgument The parameter passed into Procedure for all APs.\r | |
407 | \r | |
408 | @retval EFI_SUCCESS In blocking mode, all APs have finished before the\r | |
409 | timeout expired.\r | |
410 | @retval EFI_DEVICE_ERROR Caller processor is AP.\r | |
411 | @retval EFI_NOT_STARTED No enabled APs exist in the system.\r | |
412 | @retval EFI_NOT_READY Any enabled APs are busy.\r | |
413 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before all\r | |
414 | enabled APs have finished.\r | |
415 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
416 | **/\r | |
417 | EFI_STATUS\r | |
418 | EFIAPI\r | |
419 | PeiStartupAllAPs (\r | |
420 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
421 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
422 | IN EFI_AP_PROCEDURE Procedure,\r | |
423 | IN BOOLEAN SingleThread,\r | |
424 | IN UINTN TimeoutInMicroSeconds,\r | |
425 | IN VOID *ProcedureArgument OPTIONAL\r | |
426 | )\r | |
427 | {\r | |
428 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
429 | UINTN ProcessorNumber;\r | |
430 | UINTN Index;\r | |
431 | UINTN CallerNumber;\r | |
432 | BOOLEAN HasEnabledAp;\r | |
433 | BOOLEAN HasEnabledIdleAp;\r | |
434 | volatile UINT32 *FinishedCount;\r | |
435 | EFI_STATUS Status;\r | |
436 | UINTN WaitCountIndex;\r | |
437 | UINTN WaitCountNumber;\r | |
438 | \r | |
439 | PeiCpuMpData = GetMpHobData ();\r | |
440 | if (PeiCpuMpData == NULL) {\r | |
441 | return EFI_NOT_FOUND;\r | |
442 | }\r | |
443 | \r | |
444 | //\r | |
445 | // Check whether caller processor is BSP\r | |
446 | //\r | |
447 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
448 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
449 | return EFI_DEVICE_ERROR;\r | |
450 | }\r | |
451 | \r | |
452 | ProcessorNumber = PeiCpuMpData->CpuCount;\r | |
453 | \r | |
454 | HasEnabledAp = FALSE;\r | |
455 | HasEnabledIdleAp = FALSE;\r | |
456 | for (Index = 0; Index < ProcessorNumber; Index ++) {\r | |
457 | if (Index == CallerNumber) {\r | |
458 | //\r | |
459 | // Skip BSP\r | |
460 | //\r | |
461 | continue;\r | |
462 | }\r | |
463 | if (PeiCpuMpData->CpuData[Index].State != CpuStateDisabled) {\r | |
464 | HasEnabledAp = TRUE;\r | |
465 | if (PeiCpuMpData->CpuData[Index].State != CpuStateBusy) {\r | |
466 | HasEnabledIdleAp = TRUE;\r | |
467 | }\r | |
468 | }\r | |
469 | }\r | |
470 | if (!HasEnabledAp) {\r | |
471 | //\r | |
472 | // If no enabled AP exists, return EFI_NOT_STARTED.\r | |
473 | //\r | |
474 | return EFI_NOT_STARTED;\r | |
475 | }\r | |
476 | if (!HasEnabledIdleAp) {\r | |
477 | //\r | |
478 | // If any enabled APs are busy, return EFI_NOT_READY.\r | |
479 | //\r | |
480 | return EFI_NOT_READY;\r | |
481 | }\r | |
482 | \r | |
483 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
484 | //\r | |
485 | // Backup original data and copy AP reset vector in it\r | |
486 | //\r | |
487 | BackupAndPrepareWakeupBuffer(PeiCpuMpData);\r | |
488 | }\r | |
489 | \r | |
490 | WaitCountNumber = TimeoutInMicroSeconds / CPU_CHECK_AP_INTERVAL + 1;\r | |
491 | WaitCountIndex = 0;\r | |
492 | FinishedCount = &PeiCpuMpData->FinishedCount;\r | |
493 | if (!SingleThread) {\r | |
494 | WakeUpAP (PeiCpuMpData, TRUE, 0, Procedure, ProcedureArgument);\r | |
495 | //\r | |
496 | // Wait to finish\r | |
497 | //\r | |
498 | if (TimeoutInMicroSeconds == 0) {\r | |
499 | while (*FinishedCount < ProcessorNumber - 1) {\r | |
500 | CpuPause ();\r | |
501 | }\r | |
502 | Status = EFI_SUCCESS;\r | |
503 | } else {\r | |
504 | Status = EFI_TIMEOUT;\r | |
505 | for (WaitCountIndex = 0; WaitCountIndex < WaitCountNumber; WaitCountIndex++) {\r | |
506 | MicroSecondDelay (CPU_CHECK_AP_INTERVAL);\r | |
507 | if (*FinishedCount >= ProcessorNumber - 1) {\r | |
508 | Status = EFI_SUCCESS;\r | |
509 | break;\r | |
510 | }\r | |
511 | }\r | |
512 | }\r | |
513 | } else {\r | |
514 | Status = EFI_SUCCESS;\r | |
515 | for (Index = 0; Index < ProcessorNumber; Index++) {\r | |
516 | if (Index == CallerNumber) {\r | |
517 | continue;\r | |
518 | }\r | |
519 | WakeUpAP (PeiCpuMpData, FALSE, PeiCpuMpData->CpuData[Index].ApicId, Procedure, ProcedureArgument);\r | |
520 | //\r | |
521 | // Wait to finish\r | |
522 | //\r | |
523 | if (TimeoutInMicroSeconds == 0) {\r | |
524 | while (*FinishedCount < 1) {\r | |
525 | CpuPause ();\r | |
526 | }\r | |
527 | } else {\r | |
528 | for (WaitCountIndex = 0; WaitCountIndex < WaitCountNumber; WaitCountIndex++) {\r | |
529 | MicroSecondDelay (CPU_CHECK_AP_INTERVAL);\r | |
530 | if (*FinishedCount >= 1) {\r | |
531 | break;\r | |
532 | }\r | |
533 | }\r | |
534 | if (WaitCountIndex == WaitCountNumber) {\r | |
535 | Status = EFI_TIMEOUT;\r | |
536 | }\r | |
537 | }\r | |
538 | }\r | |
539 | }\r | |
540 | \r | |
541 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
542 | //\r | |
543 | // Restore original data\r | |
544 | //\r | |
545 | RestoreWakeupBuffer(PeiCpuMpData);\r | |
546 | }\r | |
547 | \r | |
548 | return Status;\r | |
549 | }\r | |
550 | \r | |
551 | /**\r | |
552 | This service lets the caller get one enabled AP to execute a caller-provided\r | |
553 | function. The caller can request the BSP to wait for the completion\r | |
554 | of the AP. This service may only be called from the BSP.\r | |
555 | \r | |
556 | This function is used to dispatch one enabled AP to the function specified by\r | |
557 | Procedure passing in the argument specified by ProcedureArgument.\r | |
558 | The execution is in blocking mode. The BSP waits until the AP finishes or\r | |
559 | TimeoutInMicroSecondss expires.\r | |
560 | \r | |
561 | If the timeout specified by TimeoutInMicroseconds expires before the AP returns\r | |
562 | from Procedure, then execution of Procedure by the AP is terminated. The AP is\r | |
563 | available for subsequent calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs() and\r | |
564 | EFI_PEI_MP_SERVICES_PPI.StartupThisAP().\r | |
565 | \r | |
566 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
567 | published by the PEI Foundation.\r | |
568 | @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.\r | |
569 | @param[in] Procedure A pointer to the function to be run on enabled APs of\r | |
570 | the system.\r | |
571 | @param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the\r | |
572 | total number of logical processors minus 1. The total\r | |
573 | number of logical processors can be retrieved by\r | |
574 | EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().\r | |
575 | @param[in] TimeoutInMicroseconds\r | |
576 | Indicates the time limit in microseconds for APs to\r | |
577 | return from Procedure, for blocking mode only. Zero\r | |
578 | means infinity. If the timeout expires before all APs\r | |
579 | return from Procedure, then Procedure on the failed APs\r | |
580 | is terminated. All enabled APs are available for next\r | |
581 | function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()\r | |
582 | or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the\r | |
583 | timeout expires in blocking mode, BSP returns\r | |
584 | EFI_TIMEOUT.\r | |
585 | @param[in] ProcedureArgument The parameter passed into Procedure for all APs.\r | |
586 | \r | |
587 | @retval EFI_SUCCESS In blocking mode, specified AP finished before the\r | |
588 | timeout expires.\r | |
589 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
590 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before the\r | |
591 | specified AP has finished.\r | |
592 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
593 | ProcessorNumber does not exist.\r | |
594 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.\r | |
595 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
596 | **/\r | |
597 | EFI_STATUS\r | |
598 | EFIAPI\r | |
599 | PeiStartupThisAP (\r | |
600 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
601 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
602 | IN EFI_AP_PROCEDURE Procedure,\r | |
603 | IN UINTN ProcessorNumber,\r | |
604 | IN UINTN TimeoutInMicroseconds,\r | |
605 | IN VOID *ProcedureArgument OPTIONAL\r | |
606 | )\r | |
607 | {\r | |
608 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
609 | UINTN CallerNumber;\r | |
610 | volatile UINT32 *FinishedCount;\r | |
611 | EFI_STATUS Status;\r | |
612 | UINTN WaitCountIndex;\r | |
613 | UINTN WaitCountNumber;\r | |
614 | \r | |
615 | PeiCpuMpData = GetMpHobData ();\r | |
616 | if (PeiCpuMpData == NULL) {\r | |
617 | return EFI_NOT_FOUND;\r | |
618 | }\r | |
619 | \r | |
620 | //\r | |
621 | // Check whether caller processor is BSP\r | |
622 | //\r | |
623 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
624 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
625 | return EFI_DEVICE_ERROR;\r | |
626 | }\r | |
627 | \r | |
628 | if (ProcessorNumber >= PeiCpuMpData->CpuCount) {\r | |
629 | return EFI_NOT_FOUND;\r | |
630 | }\r | |
631 | \r | |
632 | if (ProcessorNumber == PeiCpuMpData->BspNumber || Procedure == NULL) {\r | |
633 | return EFI_INVALID_PARAMETER;\r | |
634 | }\r | |
635 | \r | |
636 | //\r | |
637 | // Check whether specified AP is disabled\r | |
638 | //\r | |
639 | if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateDisabled) {\r | |
640 | return EFI_INVALID_PARAMETER;\r | |
641 | }\r | |
642 | \r | |
643 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
644 | //\r | |
645 | // Backup original data and copy AP reset vector in it\r | |
646 | //\r | |
647 | BackupAndPrepareWakeupBuffer(PeiCpuMpData);\r | |
648 | }\r | |
649 | \r | |
650 | WaitCountNumber = TimeoutInMicroseconds / CPU_CHECK_AP_INTERVAL + 1;\r | |
651 | WaitCountIndex = 0;\r | |
652 | FinishedCount = &PeiCpuMpData->FinishedCount;\r | |
653 | \r | |
654 | WakeUpAP (PeiCpuMpData, FALSE, PeiCpuMpData->CpuData[ProcessorNumber].ApicId, Procedure, ProcedureArgument);\r | |
655 | \r | |
656 | //\r | |
657 | // Wait to finish\r | |
658 | //\r | |
659 | if (TimeoutInMicroseconds == 0) {\r | |
660 | while (*FinishedCount < 1) {\r | |
661 | CpuPause() ;\r | |
662 | }\r | |
663 | Status = EFI_SUCCESS;\r | |
664 | } else {\r | |
665 | Status = EFI_TIMEOUT;\r | |
666 | for (WaitCountIndex = 0; WaitCountIndex < WaitCountNumber; WaitCountIndex++) {\r | |
667 | MicroSecondDelay (CPU_CHECK_AP_INTERVAL);\r | |
668 | if (*FinishedCount >= 1) {\r | |
669 | Status = EFI_SUCCESS;\r | |
670 | break;\r | |
671 | }\r | |
672 | }\r | |
673 | }\r | |
674 | \r | |
675 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
676 | //\r | |
677 | // Backup original data and copy AP reset vector in it\r | |
678 | //\r | |
679 | RestoreWakeupBuffer(PeiCpuMpData);\r | |
680 | }\r | |
681 | \r | |
682 | return Status;\r | |
683 | }\r | |
684 | \r | |
685 | /**\r | |
686 | This service switches the requested AP to be the BSP from that point onward.\r | |
687 | This service changes the BSP for all purposes. This call can only be performed\r | |
688 | by the current BSP.\r | |
689 | \r | |
690 | This service switches the requested AP to be the BSP from that point onward.\r | |
691 | This service changes the BSP for all purposes. The new BSP can take over the\r | |
692 | execution of the old BSP and continue seamlessly from where the old one left\r | |
693 | off.\r | |
694 | \r | |
695 | If the BSP cannot be switched prior to the return from this service, then\r | |
696 | EFI_UNSUPPORTED must be returned.\r | |
697 | \r | |
698 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
699 | published by the PEI Foundation.\r | |
700 | @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.\r | |
701 | @param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the\r | |
702 | total number of logical processors minus 1. The total\r | |
703 | number of logical processors can be retrieved by\r | |
704 | EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().\r | |
705 | @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an enabled\r | |
706 | AP. Otherwise, it will be disabled.\r | |
707 | \r | |
708 | @retval EFI_SUCCESS BSP successfully switched.\r | |
709 | @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to this\r | |
710 | service returning.\r | |
711 | @retval EFI_UNSUPPORTED Switching the BSP is not supported.\r | |
712 | @retval EFI_SUCCESS The calling processor is an AP.\r | |
713 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
714 | ProcessorNumber does not exist.\r | |
715 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or a disabled\r | |
716 | AP.\r | |
717 | @retval EFI_NOT_READY The specified AP is busy.\r | |
718 | **/\r | |
719 | EFI_STATUS\r | |
720 | EFIAPI\r | |
721 | PeiSwitchBSP (\r | |
722 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
723 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
724 | IN UINTN ProcessorNumber,\r | |
725 | IN BOOLEAN EnableOldBSP\r | |
726 | )\r | |
727 | {\r | |
728 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
729 | UINTN CallerNumber;\r | |
730 | MSR_IA32_APIC_BASE ApicBaseMsr;\r | |
731 | \r | |
732 | PeiCpuMpData = GetMpHobData ();\r | |
733 | if (PeiCpuMpData == NULL) {\r | |
734 | return EFI_NOT_FOUND;\r | |
735 | }\r | |
736 | \r | |
737 | //\r | |
738 | // Check whether caller processor is BSP\r | |
739 | //\r | |
740 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
741 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
742 | return EFI_SUCCESS;\r | |
743 | }\r | |
744 | \r | |
745 | if (ProcessorNumber >= PeiCpuMpData->CpuCount) {\r | |
746 | return EFI_NOT_FOUND;\r | |
747 | }\r | |
748 | \r | |
749 | //\r | |
750 | // Check whether specified AP is disabled\r | |
751 | //\r | |
752 | if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateDisabled) {\r | |
753 | return EFI_INVALID_PARAMETER;\r | |
754 | }\r | |
755 | \r | |
756 | //\r | |
757 | // Check whether ProcessorNumber specifies the current BSP\r | |
758 | //\r | |
759 | if (ProcessorNumber == PeiCpuMpData->BspNumber) {\r | |
760 | return EFI_INVALID_PARAMETER;\r | |
761 | }\r | |
762 | \r | |
763 | //\r | |
764 | // Check whether specified AP is busy\r | |
765 | //\r | |
766 | if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateBusy) {\r | |
767 | return EFI_NOT_READY;\r | |
768 | }\r | |
769 | \r | |
770 | //\r | |
771 | // Clear the BSP bit of MSR_IA32_APIC_BASE\r | |
772 | //\r | |
773 | ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE_ADDRESS);\r | |
774 | ApicBaseMsr.Bits.Bsp = 0;\r | |
775 | AsmWriteMsr64 (MSR_IA32_APIC_BASE_ADDRESS, ApicBaseMsr.Uint64);\r | |
776 | \r | |
777 | PeiCpuMpData->BSPInfo.State = CPU_SWITCH_STATE_IDLE;\r | |
778 | PeiCpuMpData->APInfo.State = CPU_SWITCH_STATE_IDLE;\r | |
779 | \r | |
780 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
781 | //\r | |
782 | // Backup original data and copy AP reset vector in it\r | |
783 | //\r | |
784 | BackupAndPrepareWakeupBuffer(PeiCpuMpData);\r | |
785 | }\r | |
786 | \r | |
787 | //\r | |
788 | // Need to wakeUp AP (future BSP).\r | |
789 | //\r | |
790 | WakeUpAP (PeiCpuMpData, FALSE, PeiCpuMpData->CpuData[ProcessorNumber].ApicId, FutureBSPProc, PeiCpuMpData);\r | |
791 | \r | |
792 | AsmExchangeRole (&PeiCpuMpData->BSPInfo, &PeiCpuMpData->APInfo);\r | |
793 | \r | |
794 | if (PeiCpuMpData->EndOfPeiFlag) {\r | |
795 | //\r | |
796 | // Backup original data and copy AP reset vector in it\r | |
797 | //\r | |
798 | RestoreWakeupBuffer(PeiCpuMpData);\r | |
799 | }\r | |
800 | \r | |
801 | //\r | |
802 | // Set the BSP bit of MSR_IA32_APIC_BASE on new BSP\r | |
803 | //\r | |
804 | ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE_ADDRESS);\r | |
805 | ApicBaseMsr.Bits.Bsp = 1;\r | |
806 | AsmWriteMsr64 (MSR_IA32_APIC_BASE_ADDRESS, ApicBaseMsr.Uint64);\r | |
807 | \r | |
808 | return EFI_SUCCESS;\r | |
809 | }\r | |
810 | \r | |
811 | /**\r | |
812 | This service lets the caller enable or disable an AP from this point onward.\r | |
813 | This service may only be called from the BSP.\r | |
814 | \r | |
815 | This service allows the caller enable or disable an AP from this point onward.\r | |
816 | The caller can optionally specify the health status of the AP by Health. If\r | |
817 | an AP is being disabled, then the state of the disabled AP is implementation\r | |
818 | dependent. If an AP is enabled, then the implementation must guarantee that a\r | |
819 | complete initialization sequence is performed on the AP, so the AP is in a state\r | |
820 | that is compatible with an MP operating system.\r | |
821 | \r | |
822 | If the enable or disable AP operation cannot be completed prior to the return\r | |
823 | from this service, then EFI_UNSUPPORTED must be returned.\r | |
824 | \r | |
825 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
826 | published by the PEI Foundation.\r | |
827 | @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.\r | |
828 | @param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the\r | |
829 | total number of logical processors minus 1. The total\r | |
830 | number of logical processors can be retrieved by\r | |
831 | EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().\r | |
832 | @param[in] EnableAP Specifies the new state for the processor for enabled,\r | |
833 | FALSE for disabled.\r | |
834 | @param[in] HealthFlag If not NULL, a pointer to a value that specifies the\r | |
835 | new health status of the AP. This flag corresponds to\r | |
836 | StatusFlag defined in EFI_PEI_MP_SERVICES_PPI.GetProcessorInfo().\r | |
837 | Only the PROCESSOR_HEALTH_STATUS_BIT is used. All other\r | |
838 | bits are ignored. If it is NULL, this parameter is\r | |
839 | ignored.\r | |
840 | \r | |
841 | @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.\r | |
842 | @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed prior\r | |
843 | to this service returning.\r | |
844 | @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.\r | |
845 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
846 | @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber\r | |
847 | does not exist.\r | |
848 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.\r | |
849 | **/\r | |
850 | EFI_STATUS\r | |
851 | EFIAPI\r | |
852 | PeiEnableDisableAP (\r | |
853 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
854 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
855 | IN UINTN ProcessorNumber,\r | |
856 | IN BOOLEAN EnableAP,\r | |
857 | IN UINT32 *HealthFlag OPTIONAL\r | |
858 | )\r | |
859 | {\r | |
860 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
861 | UINTN CallerNumber;\r | |
862 | \r | |
863 | PeiCpuMpData = GetMpHobData ();\r | |
864 | if (PeiCpuMpData == NULL) {\r | |
865 | return EFI_NOT_FOUND;\r | |
866 | }\r | |
867 | \r | |
868 | //\r | |
869 | // Check whether caller processor is BSP\r | |
870 | //\r | |
871 | PeiWhoAmI (PeiServices, This, &CallerNumber);\r | |
872 | if (CallerNumber != PeiCpuMpData->BspNumber) {\r | |
873 | return EFI_DEVICE_ERROR;\r | |
874 | }\r | |
875 | \r | |
876 | if (ProcessorNumber == PeiCpuMpData->BspNumber) {\r | |
877 | return EFI_INVALID_PARAMETER;\r | |
878 | }\r | |
879 | \r | |
880 | if (ProcessorNumber >= PeiCpuMpData->CpuCount) {\r | |
881 | return EFI_NOT_FOUND;\r | |
882 | }\r | |
883 | \r | |
884 | if (!EnableAP) {\r | |
885 | PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateDisabled;\r | |
886 | } else {\r | |
887 | PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateIdle;\r | |
888 | }\r | |
889 | \r | |
890 | if (HealthFlag != NULL) {\r | |
891 | PeiCpuMpData->CpuData[ProcessorNumber].CpuHealthy =\r | |
892 | (BOOLEAN) ((*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT) != 0);\r | |
893 | }\r | |
894 | return EFI_SUCCESS;\r | |
895 | }\r | |
896 | \r | |
897 | /**\r | |
898 | This return the handle number for the calling processor. This service may be\r | |
899 | called from the BSP and APs.\r | |
900 | \r | |
901 | This service returns the processor handle number for the calling processor.\r | |
902 | The returned value is in the range from 0 to the total number of logical\r | |
903 | processors minus 1. The total number of logical processors can be retrieved\r | |
904 | with EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors(). This service may be\r | |
905 | called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER\r | |
906 | is returned. Otherwise, the current processors handle number is returned in\r | |
907 | ProcessorNumber, and EFI_SUCCESS is returned.\r | |
908 | \r | |
909 | @param[in] PeiServices An indirect pointer to the PEI Services Table\r | |
910 | published by the PEI Foundation.\r | |
911 | @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.\r | |
912 | @param[out] ProcessorNumber The handle number of the AP. The range is from 0 to the\r | |
913 | total number of logical processors minus 1. The total\r | |
914 | number of logical processors can be retrieved by\r | |
915 | EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().\r | |
916 | \r | |
917 | @retval EFI_SUCCESS The current processor handle number was returned in\r | |
918 | ProcessorNumber.\r | |
919 | @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.\r | |
920 | **/\r | |
921 | EFI_STATUS\r | |
922 | EFIAPI\r | |
923 | PeiWhoAmI (\r | |
924 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
925 | IN EFI_PEI_MP_SERVICES_PPI *This,\r | |
926 | OUT UINTN *ProcessorNumber\r | |
927 | )\r | |
928 | {\r | |
929 | PEI_CPU_MP_DATA *PeiCpuMpData;\r | |
930 | \r | |
931 | PeiCpuMpData = GetMpHobData ();\r | |
932 | if (PeiCpuMpData == NULL) {\r | |
933 | return EFI_NOT_FOUND;\r | |
934 | }\r | |
935 | \r | |
936 | if (ProcessorNumber == NULL) {\r | |
937 | return EFI_INVALID_PARAMETER;\r | |
938 | }\r | |
939 | \r | |
940 | return GetProcessorNumber (PeiCpuMpData, ProcessorNumber);\r | |
941 | }\r | |
942 | \r |