UefiCpuPkg: Update CPU MP drivers to support single CPU configuration
[mirror_edk2.git] / UefiCpuPkg / CpuMpPei / CpuMpPei.c
CommitLineData
ea0f431c
JF
1/** @file\r
2 CPU PEI Module installs CPU Multiple Processor PPI.\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 "CpuMpPei.h"\r
16\r
17//\r
18// Global Descriptor Table (GDT)\r
19//\r
20GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT mGdtEntries[] = {\r
21/* selector { Global Segment Descriptor } */\r
22/* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor\r
23/* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor\r
24/* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor\r
25/* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
26/* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor\r
27/* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
28/* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
29/* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor\r
30/* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
31};\r
32\r
33//\r
34// IA32 Gdt register\r
35//\r
36GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR mGdt = {\r
37 sizeof (mGdtEntries) - 1,\r
38 (UINTN) mGdtEntries\r
39 };\r
40\r
41GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {\r
42 (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
43 &gEfiEndOfPeiSignalPpiGuid,\r
44 CpuMpEndOfPeiCallback\r
45};\r
46\r
47/**\r
48 Sort the APIC ID of all processors.\r
49\r
50 This function sorts the APIC ID of all processors so that processor number is\r
51 assigned in the ascending order of APIC ID which eases MP debugging.\r
52\r
53 @param PeiCpuMpData Pointer to PEI CPU MP Data\r
54**/\r
55VOID\r
56SortApicId (\r
57 IN PEI_CPU_MP_DATA *PeiCpuMpData\r
58 )\r
59{\r
60 UINTN Index1;\r
61 UINTN Index2;\r
62 UINTN Index3;\r
63 UINT32 ApicId;\r
64 EFI_HEALTH_FLAGS Health;\r
65 UINT32 ApCount;\r
66\r
67 ApCount = PeiCpuMpData->CpuCount - 1;\r
68\r
69 if (ApCount != 0) {\r
70 for (Index1 = 0; Index1 < ApCount; Index1++) {\r
71 Index3 = Index1;\r
72 //\r
73 // Sort key is the hardware default APIC ID\r
74 //\r
75 ApicId = PeiCpuMpData->CpuData[Index1].ApicId;\r
76 for (Index2 = Index1 + 1; Index2 <= ApCount; Index2++) {\r
77 if (ApicId > PeiCpuMpData->CpuData[Index2].ApicId) {\r
78 Index3 = Index2;\r
79 ApicId = PeiCpuMpData->CpuData[Index2].ApicId;\r
80 }\r
81 }\r
82 if (Index3 != Index1) {\r
83 PeiCpuMpData->CpuData[Index3].ApicId = PeiCpuMpData->CpuData[Index1].ApicId;\r
84 PeiCpuMpData->CpuData[Index1].ApicId = ApicId;\r
85 Health = PeiCpuMpData->CpuData[Index3].Health;\r
86 PeiCpuMpData->CpuData[Index3].Health = PeiCpuMpData->CpuData[Index1].Health;\r
87 PeiCpuMpData->CpuData[Index1].Health = Health;\r
88 }\r
89 }\r
90\r
91 //\r
92 // Get the processor number for the BSP\r
93 //\r
94 ApicId = GetInitialApicId ();\r
95 for (Index1 = 0; Index1 < PeiCpuMpData->CpuCount; Index1++) {\r
96 if (PeiCpuMpData->CpuData[Index1].ApicId == ApicId) {\r
97 PeiCpuMpData->BspNumber = (UINT32) Index1;\r
98 break;\r
99 }\r
100 }\r
101 }\r
102}\r
103\r
104/**\r
105 Get CPU MP Data pointer from the Guided HOB.\r
106\r
107 @return Pointer to Pointer to PEI CPU MP Data\r
108**/\r
109PEI_CPU_MP_DATA *\r
110GetMpHobData (\r
111 VOID\r
112 )\r
113{\r
114 EFI_HOB_GUID_TYPE *GuidHob;\r
115 VOID *DataInHob;\r
116 PEI_CPU_MP_DATA *CpuMpData;\r
117\r
118 CpuMpData = NULL;\r
119 GuidHob = GetFirstGuidHob (&gEfiCallerIdGuid);\r
120 if (GuidHob != NULL) {\r
121 DataInHob = GET_GUID_HOB_DATA (GuidHob);\r
122 CpuMpData = (PEI_CPU_MP_DATA *)(*(UINTN *)DataInHob);\r
123 }\r
124 ASSERT (CpuMpData != NULL);\r
125 return CpuMpData;\r
126}\r
127\r
128/**\r
129 This function will be called from AP reset code if BSP uses WakeUpAP.\r
130\r
131 @param ExchangeInfo Pointer to the MP exchange info buffer\r
132 @param NumApsExecuting Number of curret executing AP\r
133**/\r
134VOID\r
135EFIAPI\r
136ApCFunction (\r
137 IN MP_CPU_EXCHANGE_INFO *ExchangeInfo,\r
138 IN UINTN NumApsExecuting\r
139 )\r
140{\r
141 PEI_CPU_MP_DATA *PeiCpuMpData;\r
142 UINTN ProcessorNumber;\r
143 EFI_AP_PROCEDURE Procedure;\r
144 UINTN BistData;\r
145\r
146 PeiCpuMpData = ExchangeInfo->PeiCpuMpData;\r
147 if (PeiCpuMpData->InitFlag) {\r
148 //\r
149 // This is first time AP wakeup, get BIST inforamtion from AP stack\r
150 //\r
151 BistData = *(UINTN *) (PeiCpuMpData->Buffer + NumApsExecuting * PeiCpuMpData->CpuApStackSize - sizeof (UINTN));\r
152 PeiCpuMpData->CpuData[NumApsExecuting].ApicId = GetInitialApicId ();\r
153 PeiCpuMpData->CpuData[NumApsExecuting].Health.Uint32 = (UINT32) BistData;\r
154 //\r
155 // Sync BSP's Mtrr table to all wakeup APs and load microcode on APs.\r
156 //\r
157 MtrrSetAllMtrrs (&PeiCpuMpData->MtrrTable);\r
158 MicrocodeDetect ();\r
159 } else {\r
160 //\r
161 // Execute AP function if AP is not disabled\r
162 //\r
163 GetProcessorNumber (PeiCpuMpData, &ProcessorNumber);\r
164 if ((PeiCpuMpData->CpuData[ProcessorNumber].State != CpuStateDisabled) &&\r
165 (PeiCpuMpData->ApFunction != 0)) {\r
166 PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateBusy;\r
167 Procedure = (EFI_AP_PROCEDURE)(UINTN)PeiCpuMpData->ApFunction;\r
168 Procedure ((VOID *)(UINTN)PeiCpuMpData->ApFunctionArgument);\r
169 PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateIdle;\r
170 }\r
171 }\r
172\r
173 //\r
174 // AP finished executing C code\r
175 //\r
176 InterlockedIncrement ((UINT32 *)&PeiCpuMpData->FinishedCount);\r
177\r
178 AsmCliHltLoop ();\r
179}\r
180\r
181/**\r
182 This function will be called by BSP to wakeup AP.\r
183\r
184 @param PeiCpuMpData Pointer to PEI CPU MP Data\r
185 @param Broadcast TRUE: Send broadcast IPI to all APs\r
186 FALSE: Send IPI to AP by ApicId\r
187 @param ApicId Apic ID for the processor to be waked\r
188 @param Procedure The function to be invoked by AP\r
189 @param ProcedureArgument The argument to be passed into AP function\r
190**/\r
191VOID\r
192WakeUpAP (\r
193 IN PEI_CPU_MP_DATA *PeiCpuMpData,\r
194 IN BOOLEAN Broadcast,\r
195 IN UINT32 ApicId,\r
196 IN EFI_AP_PROCEDURE Procedure, OPTIONAL\r
197 IN VOID *ProcedureArgument OPTIONAL\r
198 )\r
199{\r
200 volatile MP_CPU_EXCHANGE_INFO *ExchangeInfo;\r
201\r
202 PeiCpuMpData->ApFunction = (UINTN) Procedure;\r
203 PeiCpuMpData->ApFunctionArgument = (UINTN) ProcedureArgument;\r
204 PeiCpuMpData->FinishedCount = 0;\r
205\r
206 ExchangeInfo = PeiCpuMpData->MpCpuExchangeInfo;\r
207 ExchangeInfo->Lock = 0;\r
208 ExchangeInfo->StackStart = PeiCpuMpData->Buffer;\r
209 ExchangeInfo->StackSize = PeiCpuMpData->CpuApStackSize;\r
210 ExchangeInfo->BufferStart = PeiCpuMpData->WakeupBuffer;\r
211 ExchangeInfo->PmodeOffset = PeiCpuMpData->AddressMap.PModeEntryOffset;\r
212 ExchangeInfo->LmodeOffset = PeiCpuMpData->AddressMap.LModeEntryOffset;\r
213 ExchangeInfo->Cr3 = AsmReadCr3 ();\r
214 ExchangeInfo->CFunction = (UINTN) ApCFunction;\r
215 ExchangeInfo->NumApsExecuting = 0;\r
216 ExchangeInfo->PeiCpuMpData = PeiCpuMpData;\r
217\r
218 //\r
219 // Get the BSP's data of GDT and IDT\r
220 //\r
221 CopyMem ((VOID *)&ExchangeInfo->GdtrProfile, &mGdt, sizeof(mGdt));\r
222 AsmReadIdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->IdtrProfile);\r
223\r
224 if (Broadcast) {\r
225 SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);\r
226 } else {\r
227 SendInitSipiSipi (ApicId, (UINT32) ExchangeInfo->BufferStart);\r
228 }\r
229\r
230 return ;\r
231}\r
232\r
233/**\r
234 Get available system memory below 1MB by specified size.\r
235\r
236 @param WakeupBufferSize Wakeup buffer size required\r
237\r
238 @retval other Return wakeup buffer address below 1MB.\r
239 @retval -1 Cannot find free memory below 1MB.\r
240**/\r
241UINTN\r
242GetWakeupBuffer (\r
243 IN UINTN WakeupBufferSize\r
244 )\r
245{\r
246 EFI_PEI_HOB_POINTERS Hob;\r
247 UINTN WakeupBufferStart;\r
248 UINTN WakeupBufferEnd;\r
249\r
250 //\r
251 // Get the HOB list for processing\r
252 //\r
253 Hob.Raw = GetHobList ();\r
254\r
255 //\r
256 // Collect memory ranges\r
257 //\r
258 while (!END_OF_HOB_LIST (Hob)) {\r
259 if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {\r
260 if ((Hob.ResourceDescriptor->PhysicalStart < BASE_1MB) &&\r
261 (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&\r
262 ((Hob.ResourceDescriptor->ResourceAttribute &\r
263 (EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED |\r
264 EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED |\r
265 EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED\r
266 )) == 0)\r
267 ) {\r
268 //\r
269 // Need memory under 1MB to be collected here\r
270 //\r
271 WakeupBufferEnd = (UINTN) (Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength);\r
272 if (WakeupBufferEnd > BASE_1MB) {\r
273 //\r
274 // Wakeup buffer should be under 1MB\r
275 //\r
276 WakeupBufferEnd = BASE_1MB;\r
277 }\r
278 //\r
279 // Wakeup buffer should be aligned on 4KB\r
280 //\r
281 WakeupBufferStart = (WakeupBufferEnd - WakeupBufferSize) & ~(SIZE_4KB - 1);\r
282 if (WakeupBufferStart < Hob.ResourceDescriptor->PhysicalStart) {\r
283 continue;\r
284 }\r
285 //\r
286 // Create a memory allocation HOB.\r
287 //\r
288 BuildMemoryAllocationHob (\r
289 WakeupBufferStart,\r
290 WakeupBufferSize,\r
291 EfiBootServicesData\r
292 );\r
293 return WakeupBufferStart;\r
294 }\r
295 }\r
296 //\r
297 // Find the next HOB\r
298 //\r
299 Hob.Raw = GET_NEXT_HOB (Hob);\r
300 }\r
301\r
302 return (UINTN) -1;\r
303}\r
304\r
305/**\r
306 Get available system memory below 1MB by specified size.\r
307\r
308 @param PeiCpuMpData Pointer to PEI CPU MP Data\r
309**/\r
310VOID\r
311BackupAndPrepareWakeupBuffer(\r
312 IN PEI_CPU_MP_DATA *PeiCpuMpData\r
313 )\r
314{\r
315 CopyMem (\r
316 (VOID *) PeiCpuMpData->BackupBuffer,\r
317 (VOID *) PeiCpuMpData->WakeupBuffer,\r
318 PeiCpuMpData->BackupBufferSize\r
319 );\r
320 CopyMem (\r
321 (VOID *) PeiCpuMpData->WakeupBuffer,\r
322 (VOID *) PeiCpuMpData->AddressMap.RendezvousFunnelAddress,\r
323 PeiCpuMpData->AddressMap.RendezvousFunnelSize\r
324 );\r
325}\r
326\r
327/**\r
328 Restore wakeup buffer data.\r
329\r
330 @param PeiCpuMpData Pointer to PEI CPU MP Data\r
331**/\r
332VOID\r
333RestoreWakeupBuffer(\r
334 IN PEI_CPU_MP_DATA *PeiCpuMpData\r
335 )\r
336{\r
337 CopyMem ((VOID *) PeiCpuMpData->WakeupBuffer, (VOID *) PeiCpuMpData->BackupBuffer, PeiCpuMpData->BackupBufferSize);\r
338}\r
339\r
340/**\r
341 This function will get CPU count in the system.\r
342\r
343 @param PeiCpuMpData Pointer to PEI CPU MP Data\r
344\r
345 @return AP processor count\r
346**/\r
347UINT32\r
348CountProcessorNumber (\r
349 IN PEI_CPU_MP_DATA *PeiCpuMpData\r
350 )\r
351{\r
352 //\r
353 // Load Microcode on BSP\r
354 //\r
355 MicrocodeDetect ();\r
356 //\r
357 // Store BSP's MTRR setting\r
358 //\r
359 MtrrGetAllMtrrs (&PeiCpuMpData->MtrrTable);\r
944f45ae 360\r
ea0f431c 361 //\r
944f45ae 362 // Only perform AP detection if PcdCpuMaxLogicalProcessorNumber is greater than 1\r
ea0f431c 363 //\r
944f45ae
MK
364 if (PcdGet32 (PcdCpuMaxLogicalProcessorNumber) > 1) {\r
365 //\r
366 // Send broadcast IPI to APs to wakeup APs\r
367 //\r
368 PeiCpuMpData->InitFlag = 1;\r
369 WakeUpAP (PeiCpuMpData, TRUE, 0, NULL, NULL);\r
370 //\r
371 // Wait for AP task to complete and then exit.\r
372 //\r
373 MicroSecondDelay (PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds));\r
374 PeiCpuMpData->InitFlag = 0;\r
375 PeiCpuMpData->CpuCount += (UINT32)PeiCpuMpData->MpCpuExchangeInfo->NumApsExecuting;\r
376 ASSERT (PeiCpuMpData->CpuCount <= PcdGet32 (PcdCpuMaxLogicalProcessorNumber));\r
377 //\r
378 // Sort BSP/Aps by CPU APIC ID in ascending order\r
379 //\r
380 SortApicId (PeiCpuMpData);\r
381 }\r
ea0f431c
JF
382\r
383 DEBUG ((EFI_D_INFO, "CpuMpPei: Find %d processors in system.\n", PeiCpuMpData->CpuCount));\r
384 return PeiCpuMpData->CpuCount;\r
385}\r
386\r
387/**\r
388 Prepare for AP wakeup buffer and copy AP reset code into it.\r
389\r
390 Get wakeup buffer below 1MB. Allocate memory for CPU MP Data and APs Stack.\r
391\r
392 @return Pointer to PEI CPU MP Data\r
393**/\r
394PEI_CPU_MP_DATA *\r
395PrepareAPStartupVector (\r
396 VOID\r
397 )\r
398{\r
399 EFI_STATUS Status;\r
400 UINT32 MaxCpuCount;\r
401 PEI_CPU_MP_DATA *PeiCpuMpData;\r
402 EFI_PHYSICAL_ADDRESS Buffer;\r
403 UINTN BufferSize;\r
404 UINTN WakeupBuffer;\r
405 UINTN WakeupBufferSize;\r
406 MP_ASSEMBLY_ADDRESS_MAP AddressMap;\r
407\r
408 AsmGetAddressMap (&AddressMap);\r
409 WakeupBufferSize = AddressMap.RendezvousFunnelSize + sizeof (MP_CPU_EXCHANGE_INFO);\r
410 WakeupBuffer = GetWakeupBuffer ((WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1));\r
411 ASSERT (WakeupBuffer != (UINTN) -1);\r
412 DEBUG ((EFI_D_INFO, "CpuMpPei: WakeupBuffer = 0x%x\n", WakeupBuffer));\r
413\r
414 //\r
415 // Allocate Pages for APs stack, CPU MP Data and backup buffer for wakeup buffer\r
416 //\r
417 MaxCpuCount = PcdGet32(PcdCpuMaxLogicalProcessorNumber);\r
418 BufferSize = PcdGet32 (PcdCpuApStackSize) * MaxCpuCount + sizeof (PEI_CPU_MP_DATA)\r
419 + WakeupBufferSize + sizeof (PEI_CPU_DATA) * MaxCpuCount;\r
420 Status = PeiServicesAllocatePages (\r
421 EfiBootServicesData,\r
422 EFI_SIZE_TO_PAGES (BufferSize),\r
423 &Buffer\r
424 );\r
425 ASSERT_EFI_ERROR (Status);\r
426\r
427 PeiCpuMpData = (PEI_CPU_MP_DATA *) (UINTN) (Buffer + PcdGet32 (PcdCpuApStackSize) * MaxCpuCount);\r
428 PeiCpuMpData->Buffer = (UINTN) Buffer;\r
429 PeiCpuMpData->CpuApStackSize = PcdGet32 (PcdCpuApStackSize);\r
430 PeiCpuMpData->WakeupBuffer = WakeupBuffer;\r
431 PeiCpuMpData->BackupBuffer = (UINTN)PeiCpuMpData + sizeof (PEI_CPU_MP_DATA);\r
432 PeiCpuMpData->BackupBufferSize = WakeupBufferSize;\r
433 PeiCpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN) (WakeupBuffer + AddressMap.RendezvousFunnelSize);\r
434\r
435 PeiCpuMpData->CpuCount = 1;\r
436 PeiCpuMpData->BspNumber = 0;\r
28f27af6
JF
437 PeiCpuMpData->CpuData = (PEI_CPU_DATA *) (PeiCpuMpData->BackupBuffer +\r
438 PeiCpuMpData->BackupBufferSize);\r
ea0f431c
JF
439 PeiCpuMpData->CpuData[0].ApicId = GetInitialApicId ();\r
440 PeiCpuMpData->CpuData[0].Health.Uint32 = 0;\r
441 PeiCpuMpData->EndOfPeiFlag = FALSE;\r
442 CopyMem (&PeiCpuMpData->AddressMap, &AddressMap, sizeof (MP_ASSEMBLY_ADDRESS_MAP));\r
443\r
444 //\r
445 // Backup original data and copy AP reset code in it\r
446 //\r
447 BackupAndPrepareWakeupBuffer(PeiCpuMpData);\r
448\r
449 return PeiCpuMpData;\r
450}\r
451\r
452/**\r
453 Notify function on End Of Pei PPI.\r
454\r
455 On S3 boot, this function will restore wakeup buffer data.\r
456 On normal boot, this function will flag wakeup buffer to be un-used type.\r
457\r
458 @param PeiServices The pointer to the PEI Services Table.\r
459 @param NotifyDescriptor Address of the notification descriptor data structure.\r
460 @param Ppi Address of the PPI that was installed.\r
461\r
462 @retval EFI_SUCCESS When everything is OK.\r
463\r
464**/\r
465EFI_STATUS\r
466EFIAPI\r
467CpuMpEndOfPeiCallback (\r
468 IN EFI_PEI_SERVICES **PeiServices,\r
469 IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,\r
470 IN VOID *Ppi\r
471 )\r
472{\r
473 EFI_STATUS Status;\r
474 EFI_BOOT_MODE BootMode;\r
475 PEI_CPU_MP_DATA *PeiCpuMpData;\r
476 EFI_PEI_HOB_POINTERS Hob;\r
477 EFI_HOB_MEMORY_ALLOCATION *MemoryHob;\r
478\r
479 DEBUG ((EFI_D_INFO, "CpuMpPei: CpuMpEndOfPeiCallback () invokded\n"));\r
480\r
481 Status = PeiServicesGetBootMode (&BootMode);\r
482 ASSERT_EFI_ERROR (Status);\r
483\r
484 PeiCpuMpData = GetMpHobData ();\r
485 ASSERT (PeiCpuMpData != NULL);\r
486\r
487 if (BootMode != BOOT_ON_S3_RESUME) {\r
488 //\r
489 // Get the HOB list for processing\r
490 //\r
491 Hob.Raw = GetHobList ();\r
492 //\r
493 // Collect memory ranges\r
494 //\r
495 while (!END_OF_HOB_LIST (Hob)) {\r
496 if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {\r
497 MemoryHob = Hob.MemoryAllocation;\r
498 if(MemoryHob->AllocDescriptor.MemoryBaseAddress == PeiCpuMpData->WakeupBuffer) {\r
499 //\r
500 // Flag this HOB type to un-used\r
501 //\r
502 GET_HOB_TYPE (Hob) = EFI_HOB_TYPE_UNUSED;\r
503 break;\r
504 }\r
505 }\r
506 Hob.Raw = GET_NEXT_HOB (Hob);\r
507 }\r
508 } else {\r
509 RestoreWakeupBuffer (PeiCpuMpData);\r
510 PeiCpuMpData->EndOfPeiFlag = TRUE;\r
511 }\r
512 return EFI_SUCCESS;\r
513}\r
514\r
515/**\r
516 The Entry point of the MP CPU PEIM.\r
517\r
518 This function will wakeup APs and collect CPU AP count and install the\r
519 Mp Service Ppi.\r
520\r
521 @param FileHandle Handle of the file being invoked.\r
522 @param PeiServices Describes the list of possible PEI Services.\r
523\r
524 @retval EFI_SUCCESS MpServicePpi is installed successfully.\r
525\r
526**/\r
527EFI_STATUS\r
528EFIAPI\r
529CpuMpPeimInit (\r
530 IN EFI_PEI_FILE_HANDLE FileHandle,\r
531 IN CONST EFI_PEI_SERVICES **PeiServices\r
532 )\r
533{\r
534 EFI_STATUS Status;\r
535 PEI_CPU_MP_DATA *PeiCpuMpData;\r
536 UINT32 ProcessorCount;\r
537\r
538 //\r
539 // Load new GDT table on BSP\r
540 //\r
541 AsmInitializeGdt (&mGdt);\r
542 //\r
543 // Get wakeup buffer and copy AP reset code in it\r
544 //\r
545 PeiCpuMpData = PrepareAPStartupVector ();\r
546 //\r
547 // Count processor number and collect processor information\r
548 //\r
549 ProcessorCount = CountProcessorNumber (PeiCpuMpData);\r
550 //\r
551 // Build location of PEI CPU MP DATA buffer in HOB\r
552 //\r
553 BuildGuidDataHob (\r
554 &gEfiCallerIdGuid,\r
555 (VOID *)&PeiCpuMpData,\r
556 sizeof(UINT64)\r
557 );\r
558 //\r
559 // Update and publish CPU BIST information\r
560 //\r
561 CollectBistDataFromPpi (PeiServices, PeiCpuMpData);\r
562 //\r
563 // register an event for EndOfPei\r
564 //\r
565 Status = PeiServicesNotifyPpi (&mNotifyList);\r
566 ASSERT_EFI_ERROR (Status);\r
567 //\r
568 // Install CPU MP PPI\r
569 //\r
570 Status = PeiServicesInstallPpi(&mPeiCpuMpPpiDesc);\r
571 ASSERT_EFI_ERROR (Status);\r
572\r
573 return Status;\r
574}\r