2 CPU PEI Module installs CPU Multiple Processor PPI.
4 Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 // Global Descriptor Table (GDT)
20 GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT mGdtEntries
[] = {
21 /* selector { Global Segment Descriptor } */
22 /* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor
23 /* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor
24 /* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor
25 /* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
26 /* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor
27 /* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
28 /* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
29 /* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor
30 /* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
36 GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR mGdt
= {
37 sizeof (mGdtEntries
) - 1,
41 GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList
= {
42 (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK
| EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST
),
43 &gEfiEndOfPeiSignalPpiGuid
,
48 Sort the APIC ID of all processors.
50 This function sorts the APIC ID of all processors so that processor number is
51 assigned in the ascending order of APIC ID which eases MP debugging.
53 @param PeiCpuMpData Pointer to PEI CPU MP Data
57 IN PEI_CPU_MP_DATA
*PeiCpuMpData
67 ApCount
= PeiCpuMpData
->CpuCount
- 1;
70 for (Index1
= 0; Index1
< ApCount
; Index1
++) {
73 // Sort key is the hardware default APIC ID
75 ApicId
= PeiCpuMpData
->CpuData
[Index1
].ApicId
;
76 for (Index2
= Index1
+ 1; Index2
<= ApCount
; Index2
++) {
77 if (ApicId
> PeiCpuMpData
->CpuData
[Index2
].ApicId
) {
79 ApicId
= PeiCpuMpData
->CpuData
[Index2
].ApicId
;
82 if (Index3
!= Index1
) {
83 CopyMem (&CpuData
, &PeiCpuMpData
->CpuData
[Index3
], sizeof (PEI_CPU_DATA
));
85 &PeiCpuMpData
->CpuData
[Index3
],
86 &PeiCpuMpData
->CpuData
[Index1
],
89 CopyMem (&PeiCpuMpData
->CpuData
[Index1
], &CpuData
, sizeof (PEI_CPU_DATA
));
94 // Get the processor number for the BSP
96 ApicId
= GetInitialApicId ();
97 for (Index1
= 0; Index1
< PeiCpuMpData
->CpuCount
; Index1
++) {
98 if (PeiCpuMpData
->CpuData
[Index1
].ApicId
== ApicId
) {
99 PeiCpuMpData
->BspNumber
= (UINT32
) Index1
;
107 Enable x2APIC mode on APs.
109 @param Buffer Pointer to private data buffer.
117 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
121 Get CPU MP Data pointer from the Guided HOB.
123 @return Pointer to Pointer to PEI CPU MP Data
130 EFI_HOB_GUID_TYPE
*GuidHob
;
132 PEI_CPU_MP_DATA
*CpuMpData
;
135 GuidHob
= GetFirstGuidHob (&gEfiCallerIdGuid
);
136 if (GuidHob
!= NULL
) {
137 DataInHob
= GET_GUID_HOB_DATA (GuidHob
);
138 CpuMpData
= (PEI_CPU_MP_DATA
*)(*(UINTN
*)DataInHob
);
140 ASSERT (CpuMpData
!= NULL
);
145 Save the volatile registers required to be restored following INIT IPI
147 @param VolatileRegisters Returns buffer saved the volatile resisters
150 SaveVolatileRegisters (
151 OUT CPU_VOLATILE_REGISTERS
*VolatileRegisters
156 VolatileRegisters
->Cr0
= AsmReadCr0 ();
157 VolatileRegisters
->Cr3
= AsmReadCr3 ();
158 VolatileRegisters
->Cr4
= AsmReadCr4 ();
160 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &RegEdx
);
161 if ((RegEdx
& BIT2
) != 0) {
163 // If processor supports Debugging Extensions feature
164 // by CPUID.[EAX=01H]:EDX.BIT2
166 VolatileRegisters
->Dr0
= AsmReadDr0 ();
167 VolatileRegisters
->Dr1
= AsmReadDr1 ();
168 VolatileRegisters
->Dr2
= AsmReadDr2 ();
169 VolatileRegisters
->Dr3
= AsmReadDr3 ();
170 VolatileRegisters
->Dr6
= AsmReadDr6 ();
171 VolatileRegisters
->Dr7
= AsmReadDr7 ();
176 Restore the volatile registers following INIT IPI
178 @param VolatileRegisters Pointer to volatile resisters
179 @param IsRestoreDr TRUE: Restore DRx if supported
180 FALSE: Do not restore DRx
183 RestoreVolatileRegisters (
184 IN CPU_VOLATILE_REGISTERS
*VolatileRegisters
,
185 IN BOOLEAN IsRestoreDr
190 AsmWriteCr0 (VolatileRegisters
->Cr0
);
191 AsmWriteCr3 (VolatileRegisters
->Cr3
);
192 AsmWriteCr4 (VolatileRegisters
->Cr4
);
195 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &RegEdx
);
196 if ((RegEdx
& BIT2
) != 0) {
198 // If processor supports Debugging Extensions feature
199 // by CPUID.[EAX=01H]:EDX.BIT2
201 AsmWriteDr0 (VolatileRegisters
->Dr0
);
202 AsmWriteDr1 (VolatileRegisters
->Dr1
);
203 AsmWriteDr2 (VolatileRegisters
->Dr2
);
204 AsmWriteDr3 (VolatileRegisters
->Dr3
);
205 AsmWriteDr6 (VolatileRegisters
->Dr6
);
206 AsmWriteDr7 (VolatileRegisters
->Dr7
);
212 This function will be called from AP reset code if BSP uses WakeUpAP.
214 @param ExchangeInfo Pointer to the MP exchange info buffer
215 @param NumApsExecuting Number of curret executing AP
220 IN MP_CPU_EXCHANGE_INFO
*ExchangeInfo
,
221 IN UINTN NumApsExecuting
224 PEI_CPU_MP_DATA
*PeiCpuMpData
;
225 UINTN ProcessorNumber
;
226 EFI_AP_PROCEDURE Procedure
;
229 PeiCpuMpData
= ExchangeInfo
->PeiCpuMpData
;
230 if (PeiCpuMpData
->InitFlag
) {
232 // This is first time AP wakeup, get BIST information from AP stack
234 BistData
= *(UINTN
*) (PeiCpuMpData
->Buffer
+ NumApsExecuting
* PeiCpuMpData
->CpuApStackSize
- sizeof (UINTN
));
235 PeiCpuMpData
->CpuData
[NumApsExecuting
].Health
.Uint32
= (UINT32
) BistData
;
236 PeiCpuMpData
->CpuData
[NumApsExecuting
].ApicId
= GetInitialApicId ();
237 if (PeiCpuMpData
->CpuData
[NumApsExecuting
].ApicId
>= 0xFF) {
239 // Set x2APIC mode if there are any logical processor reporting
240 // an APIC ID of 255 or greater.
242 AcquireSpinLock(&PeiCpuMpData
->MpLock
);
243 PeiCpuMpData
->X2ApicEnable
= TRUE
;
244 ReleaseSpinLock(&PeiCpuMpData
->MpLock
);
247 // Sync BSP's Mtrr table to all wakeup APs and load microcode on APs.
249 MtrrSetAllMtrrs (&PeiCpuMpData
->MtrrTable
);
253 // Execute AP function if AP is not disabled
255 GetProcessorNumber (PeiCpuMpData
, &ProcessorNumber
);
256 if ((PeiCpuMpData
->CpuData
[ProcessorNumber
].State
!= CpuStateDisabled
) &&
257 (PeiCpuMpData
->ApFunction
!= 0)) {
258 PeiCpuMpData
->CpuData
[ProcessorNumber
].State
= CpuStateBusy
;
259 Procedure
= (EFI_AP_PROCEDURE
)(UINTN
)PeiCpuMpData
->ApFunction
;
260 Procedure ((VOID
*)(UINTN
)PeiCpuMpData
->ApFunctionArgument
);
261 PeiCpuMpData
->CpuData
[ProcessorNumber
].State
= CpuStateIdle
;
266 // AP finished executing C code
268 InterlockedIncrement ((UINT32
*)&PeiCpuMpData
->FinishedCount
);
274 This function will be called by BSP to wakeup AP.
276 @param PeiCpuMpData Pointer to PEI CPU MP Data
277 @param Broadcast TRUE: Send broadcast IPI to all APs
278 FALSE: Send IPI to AP by ApicId
279 @param ApicId Apic ID for the processor to be waked
280 @param Procedure The function to be invoked by AP
281 @param ProcedureArgument The argument to be passed into AP function
285 IN PEI_CPU_MP_DATA
*PeiCpuMpData
,
286 IN BOOLEAN Broadcast
,
288 IN EFI_AP_PROCEDURE Procedure
, OPTIONAL
289 IN VOID
*ProcedureArgument OPTIONAL
292 volatile MP_CPU_EXCHANGE_INFO
*ExchangeInfo
;
294 PeiCpuMpData
->ApFunction
= (UINTN
) Procedure
;
295 PeiCpuMpData
->ApFunctionArgument
= (UINTN
) ProcedureArgument
;
296 PeiCpuMpData
->FinishedCount
= 0;
298 ExchangeInfo
= PeiCpuMpData
->MpCpuExchangeInfo
;
299 ExchangeInfo
->Lock
= 0;
300 ExchangeInfo
->StackStart
= PeiCpuMpData
->Buffer
;
301 ExchangeInfo
->StackSize
= PeiCpuMpData
->CpuApStackSize
;
302 ExchangeInfo
->BufferStart
= PeiCpuMpData
->WakeupBuffer
;
303 ExchangeInfo
->PmodeOffset
= PeiCpuMpData
->AddressMap
.PModeEntryOffset
;
304 ExchangeInfo
->LmodeOffset
= PeiCpuMpData
->AddressMap
.LModeEntryOffset
;
305 ExchangeInfo
->Cr3
= AsmReadCr3 ();
306 ExchangeInfo
->CFunction
= (UINTN
) ApCFunction
;
307 ExchangeInfo
->NumApsExecuting
= 0;
308 ExchangeInfo
->PeiCpuMpData
= PeiCpuMpData
;
311 // Get the BSP's data of GDT and IDT
313 CopyMem ((VOID
*)&ExchangeInfo
->GdtrProfile
, &mGdt
, sizeof(mGdt
));
314 AsmReadIdtr ((IA32_DESCRIPTOR
*) &ExchangeInfo
->IdtrProfile
);
317 SendInitSipiSipiAllExcludingSelf ((UINT32
) ExchangeInfo
->BufferStart
);
319 SendInitSipiSipi (ApicId
, (UINT32
) ExchangeInfo
->BufferStart
);
326 Get available system memory below 1MB by specified size.
328 @param WakeupBufferSize Wakeup buffer size required
330 @retval other Return wakeup buffer address below 1MB.
331 @retval -1 Cannot find free memory below 1MB.
335 IN UINTN WakeupBufferSize
338 EFI_PEI_HOB_POINTERS Hob
;
339 UINTN WakeupBufferStart
;
340 UINTN WakeupBufferEnd
;
343 // Get the HOB list for processing
345 Hob
.Raw
= GetHobList ();
348 // Collect memory ranges
350 while (!END_OF_HOB_LIST (Hob
)) {
351 if (Hob
.Header
->HobType
== EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
) {
352 if ((Hob
.ResourceDescriptor
->PhysicalStart
< BASE_1MB
) &&
353 (Hob
.ResourceDescriptor
->ResourceType
== EFI_RESOURCE_SYSTEM_MEMORY
) &&
354 ((Hob
.ResourceDescriptor
->ResourceAttribute
&
355 (EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED
|
356 EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED
|
357 EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED
361 // Need memory under 1MB to be collected here
363 WakeupBufferEnd
= (UINTN
) (Hob
.ResourceDescriptor
->PhysicalStart
+ Hob
.ResourceDescriptor
->ResourceLength
);
364 if (WakeupBufferEnd
> BASE_1MB
) {
366 // Wakeup buffer should be under 1MB
368 WakeupBufferEnd
= BASE_1MB
;
371 // Wakeup buffer should be aligned on 4KB
373 WakeupBufferStart
= (WakeupBufferEnd
- WakeupBufferSize
) & ~(SIZE_4KB
- 1);
374 if (WakeupBufferStart
< Hob
.ResourceDescriptor
->PhysicalStart
) {
378 // Create a memory allocation HOB.
380 BuildMemoryAllocationHob (
385 return WakeupBufferStart
;
391 Hob
.Raw
= GET_NEXT_HOB (Hob
);
398 Get available system memory below 1MB by specified size.
400 @param PeiCpuMpData Pointer to PEI CPU MP Data
403 BackupAndPrepareWakeupBuffer(
404 IN PEI_CPU_MP_DATA
*PeiCpuMpData
408 (VOID
*) PeiCpuMpData
->BackupBuffer
,
409 (VOID
*) PeiCpuMpData
->WakeupBuffer
,
410 PeiCpuMpData
->BackupBufferSize
413 (VOID
*) PeiCpuMpData
->WakeupBuffer
,
414 (VOID
*) PeiCpuMpData
->AddressMap
.RendezvousFunnelAddress
,
415 PeiCpuMpData
->AddressMap
.RendezvousFunnelSize
420 Restore wakeup buffer data.
422 @param PeiCpuMpData Pointer to PEI CPU MP Data
426 IN PEI_CPU_MP_DATA
*PeiCpuMpData
429 CopyMem ((VOID
*) PeiCpuMpData
->WakeupBuffer
, (VOID
*) PeiCpuMpData
->BackupBuffer
, PeiCpuMpData
->BackupBufferSize
);
433 This function will get CPU count in the system.
435 @param PeiCpuMpData Pointer to PEI CPU MP Data
437 @return AP processor count
440 CountProcessorNumber (
441 IN PEI_CPU_MP_DATA
*PeiCpuMpData
445 // Load Microcode on BSP
449 // Store BSP's MTRR setting
451 MtrrGetAllMtrrs (&PeiCpuMpData
->MtrrTable
);
454 // Only perform AP detection if PcdCpuMaxLogicalProcessorNumber is greater than 1
456 if (PcdGet32 (PcdCpuMaxLogicalProcessorNumber
) > 1) {
458 // Send 1st broadcast IPI to APs to wakeup APs
460 PeiCpuMpData
->InitFlag
= TRUE
;
461 PeiCpuMpData
->X2ApicEnable
= FALSE
;
462 WakeUpAP (PeiCpuMpData
, TRUE
, 0, NULL
, NULL
);
464 // Wait for AP task to complete and then exit.
466 MicroSecondDelay (PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds
));
467 PeiCpuMpData
->InitFlag
= FALSE
;
468 PeiCpuMpData
->CpuCount
+= (UINT32
)PeiCpuMpData
->MpCpuExchangeInfo
->NumApsExecuting
;
469 ASSERT (PeiCpuMpData
->CpuCount
<= PcdGet32 (PcdCpuMaxLogicalProcessorNumber
));
471 // Wait for all APs finished the initialization
473 while (PeiCpuMpData
->FinishedCount
< (PeiCpuMpData
->CpuCount
- 1)) {
477 if (PeiCpuMpData
->X2ApicEnable
) {
478 DEBUG ((EFI_D_INFO
, "Force x2APIC mode!\n"));
480 // Send 2nd broadcast IPI to all APs to enable x2APIC mode
482 WakeUpAP (PeiCpuMpData
, TRUE
, 0, ApFuncEnableX2Apic
, NULL
);
484 // Wait for all known APs finished
486 while (PeiCpuMpData
->FinishedCount
< (PeiCpuMpData
->CpuCount
- 1)) {
490 // Enable x2APIC on BSP
492 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
494 DEBUG ((EFI_D_INFO
, "APIC MODE is %d\n", GetApicMode ()));
496 // Sort BSP/Aps by CPU APIC ID in ascending order
498 SortApicId (PeiCpuMpData
);
501 DEBUG ((EFI_D_INFO
, "CpuMpPei: Find %d processors in system.\n", PeiCpuMpData
->CpuCount
));
502 return PeiCpuMpData
->CpuCount
;
506 Prepare for AP wakeup buffer and copy AP reset code into it.
508 Get wakeup buffer below 1MB. Allocate memory for CPU MP Data and APs Stack.
510 @return Pointer to PEI CPU MP Data
513 PrepareAPStartupVector (
519 PEI_CPU_MP_DATA
*PeiCpuMpData
;
520 EFI_PHYSICAL_ADDRESS Buffer
;
523 UINTN WakeupBufferSize
;
524 MP_ASSEMBLY_ADDRESS_MAP AddressMap
;
526 AsmGetAddressMap (&AddressMap
);
527 WakeupBufferSize
= AddressMap
.RendezvousFunnelSize
+ sizeof (MP_CPU_EXCHANGE_INFO
);
528 WakeupBuffer
= GetWakeupBuffer ((WakeupBufferSize
+ SIZE_4KB
- 1) & ~(SIZE_4KB
- 1));
529 ASSERT (WakeupBuffer
!= (UINTN
) -1);
530 DEBUG ((EFI_D_INFO
, "CpuMpPei: WakeupBuffer = 0x%x\n", WakeupBuffer
));
533 // Allocate Pages for APs stack, CPU MP Data and backup buffer for wakeup buffer
535 MaxCpuCount
= PcdGet32(PcdCpuMaxLogicalProcessorNumber
);
536 BufferSize
= PcdGet32 (PcdCpuApStackSize
) * MaxCpuCount
+ sizeof (PEI_CPU_MP_DATA
)
537 + WakeupBufferSize
+ sizeof (PEI_CPU_DATA
) * MaxCpuCount
;
538 Status
= PeiServicesAllocatePages (
540 EFI_SIZE_TO_PAGES (BufferSize
),
543 ASSERT_EFI_ERROR (Status
);
545 PeiCpuMpData
= (PEI_CPU_MP_DATA
*) (UINTN
) (Buffer
+ PcdGet32 (PcdCpuApStackSize
) * MaxCpuCount
);
546 PeiCpuMpData
->Buffer
= (UINTN
) Buffer
;
547 PeiCpuMpData
->CpuApStackSize
= PcdGet32 (PcdCpuApStackSize
);
548 PeiCpuMpData
->WakeupBuffer
= WakeupBuffer
;
549 PeiCpuMpData
->BackupBuffer
= (UINTN
)PeiCpuMpData
+ sizeof (PEI_CPU_MP_DATA
);
550 PeiCpuMpData
->BackupBufferSize
= WakeupBufferSize
;
551 PeiCpuMpData
->MpCpuExchangeInfo
= (MP_CPU_EXCHANGE_INFO
*) (UINTN
) (WakeupBuffer
+ AddressMap
.RendezvousFunnelSize
);
553 PeiCpuMpData
->CpuCount
= 1;
554 PeiCpuMpData
->BspNumber
= 0;
555 PeiCpuMpData
->CpuData
= (PEI_CPU_DATA
*) (PeiCpuMpData
->BackupBuffer
+
556 PeiCpuMpData
->BackupBufferSize
);
557 PeiCpuMpData
->CpuData
[0].ApicId
= GetInitialApicId ();
558 PeiCpuMpData
->CpuData
[0].Health
.Uint32
= 0;
559 PeiCpuMpData
->EndOfPeiFlag
= FALSE
;
560 InitializeSpinLock(&PeiCpuMpData
->MpLock
);
561 CopyMem (&PeiCpuMpData
->AddressMap
, &AddressMap
, sizeof (MP_ASSEMBLY_ADDRESS_MAP
));
564 // Backup original data and copy AP reset code in it
566 BackupAndPrepareWakeupBuffer(PeiCpuMpData
);
572 Notify function on End Of Pei PPI.
574 On S3 boot, this function will restore wakeup buffer data.
575 On normal boot, this function will flag wakeup buffer to be un-used type.
577 @param PeiServices The pointer to the PEI Services Table.
578 @param NotifyDescriptor Address of the notification descriptor data structure.
579 @param Ppi Address of the PPI that was installed.
581 @retval EFI_SUCCESS When everything is OK.
586 CpuMpEndOfPeiCallback (
587 IN EFI_PEI_SERVICES
**PeiServices
,
588 IN EFI_PEI_NOTIFY_DESCRIPTOR
*NotifyDescriptor
,
593 EFI_BOOT_MODE BootMode
;
594 PEI_CPU_MP_DATA
*PeiCpuMpData
;
595 EFI_PEI_HOB_POINTERS Hob
;
596 EFI_HOB_MEMORY_ALLOCATION
*MemoryHob
;
598 DEBUG ((EFI_D_INFO
, "CpuMpPei: CpuMpEndOfPeiCallback () invokded\n"));
600 Status
= PeiServicesGetBootMode (&BootMode
);
601 ASSERT_EFI_ERROR (Status
);
603 PeiCpuMpData
= GetMpHobData ();
604 ASSERT (PeiCpuMpData
!= NULL
);
606 if (BootMode
!= BOOT_ON_S3_RESUME
) {
608 // Get the HOB list for processing
610 Hob
.Raw
= GetHobList ();
612 // Collect memory ranges
614 while (!END_OF_HOB_LIST (Hob
)) {
615 if (Hob
.Header
->HobType
== EFI_HOB_TYPE_MEMORY_ALLOCATION
) {
616 MemoryHob
= Hob
.MemoryAllocation
;
617 if(MemoryHob
->AllocDescriptor
.MemoryBaseAddress
== PeiCpuMpData
->WakeupBuffer
) {
619 // Flag this HOB type to un-used
621 GET_HOB_TYPE (Hob
) = EFI_HOB_TYPE_UNUSED
;
625 Hob
.Raw
= GET_NEXT_HOB (Hob
);
628 RestoreWakeupBuffer (PeiCpuMpData
);
629 PeiCpuMpData
->EndOfPeiFlag
= TRUE
;
635 The Entry point of the MP CPU PEIM.
637 This function will wakeup APs and collect CPU AP count and install the
640 @param FileHandle Handle of the file being invoked.
641 @param PeiServices Describes the list of possible PEI Services.
643 @retval EFI_SUCCESS MpServicePpi is installed successfully.
649 IN EFI_PEI_FILE_HANDLE FileHandle
,
650 IN CONST EFI_PEI_SERVICES
**PeiServices
654 PEI_CPU_MP_DATA
*PeiCpuMpData
;
655 UINT32 ProcessorCount
;
658 // Load new GDT table on BSP
660 AsmInitializeGdt (&mGdt
);
662 // Get wakeup buffer and copy AP reset code in it
664 PeiCpuMpData
= PrepareAPStartupVector ();
666 // Count processor number and collect processor information
668 ProcessorCount
= CountProcessorNumber (PeiCpuMpData
);
670 // Build location of PEI CPU MP DATA buffer in HOB
674 (VOID
*)&PeiCpuMpData
,
678 // Update and publish CPU BIST information
680 CollectBistDataFromPpi (PeiServices
, PeiCpuMpData
);
682 // register an event for EndOfPei
684 Status
= PeiServicesNotifyPpi (&mNotifyList
);
685 ASSERT_EFI_ERROR (Status
);
687 // Install CPU MP PPI
689 Status
= PeiServicesInstallPpi(&mPeiCpuMpPpiDesc
);
690 ASSERT_EFI_ERROR (Status
);