2 CPU MP Initialize Library common functions.
4 Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
11 EFI_GUID mCpuInitMpLibHobGuid
= CPU_INIT_MP_LIB_HOB_GUID
;
14 The function will check if BSP Execute Disable is enabled.
16 DxeIpl may have enabled Execute Disable for BSP, APs need to
17 get the status and sync up the settings.
18 If BSP's CR0.Paging is not set, BSP execute Disble feature is
21 @retval TRUE BSP Execute Disable is enabled.
22 @retval FALSE BSP Execute Disable is not enabled.
25 IsBspExecuteDisableEnabled (
30 CPUID_EXTENDED_CPU_SIG_EDX Edx
;
31 MSR_IA32_EFER_REGISTER EferMsr
;
36 Cr0
.UintN
= AsmReadCr0 ();
37 if (Cr0
.Bits
.PG
!= 0) {
39 // If CR0 Paging bit is set
41 AsmCpuid (CPUID_EXTENDED_FUNCTION
, &Eax
, NULL
, NULL
, NULL
);
42 if (Eax
>= CPUID_EXTENDED_CPU_SIG
) {
43 AsmCpuid (CPUID_EXTENDED_CPU_SIG
, NULL
, NULL
, NULL
, &Edx
.Uint32
);
46 // Bit 20: Execute Disable Bit available.
48 if (Edx
.Bits
.NX
!= 0) {
49 EferMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_EFER
);
52 // Bit 11: Execute Disable Bit enable.
54 if (EferMsr
.Bits
.NXE
!= 0) {
65 Worker function for SwitchBSP().
67 Worker function for SwitchBSP(), assigned to the AP which is intended
70 @param[in] Buffer Pointer to CPU MP Data
78 CPU_MP_DATA
*DataInHob
;
80 DataInHob
= (CPU_MP_DATA
*) Buffer
;
81 AsmExchangeRole (&DataInHob
->APInfo
, &DataInHob
->BSPInfo
);
85 Get the Application Processors state.
87 @param[in] CpuData The pointer to CPU_AP_DATA of specified AP
93 IN CPU_AP_DATA
*CpuData
96 return CpuData
->State
;
100 Set the Application Processors state.
102 @param[in] CpuData The pointer to CPU_AP_DATA of specified AP
103 @param[in] State The AP status
107 IN CPU_AP_DATA
*CpuData
,
111 AcquireSpinLock (&CpuData
->ApLock
);
112 CpuData
->State
= State
;
113 ReleaseSpinLock (&CpuData
->ApLock
);
117 Save BSP's local APIC timer setting.
119 @param[in] CpuMpData Pointer to CPU MP Data
122 SaveLocalApicTimerSetting (
123 IN CPU_MP_DATA
*CpuMpData
127 // Record the current local APIC timer setting of BSP
130 &CpuMpData
->DivideValue
,
131 &CpuMpData
->PeriodicMode
,
134 CpuMpData
->CurrentTimerCount
= GetApicTimerCurrentCount ();
135 CpuMpData
->TimerInterruptState
= GetApicTimerInterruptState ();
139 Sync local APIC timer setting from BSP to AP.
141 @param[in] CpuMpData Pointer to CPU MP Data
144 SyncLocalApicTimerSetting (
145 IN CPU_MP_DATA
*CpuMpData
149 // Sync local APIC timer setting from BSP to AP
151 InitializeApicTimer (
152 CpuMpData
->DivideValue
,
153 CpuMpData
->CurrentTimerCount
,
154 CpuMpData
->PeriodicMode
,
158 // Disable AP's local APIC timer interrupt
160 DisableApicTimerInterrupt ();
164 Save the volatile registers required to be restored following INIT IPI.
166 @param[out] VolatileRegisters Returns buffer saved the volatile resisters
169 SaveVolatileRegisters (
170 OUT CPU_VOLATILE_REGISTERS
*VolatileRegisters
173 CPUID_VERSION_INFO_EDX VersionInfoEdx
;
175 VolatileRegisters
->Cr0
= AsmReadCr0 ();
176 VolatileRegisters
->Cr3
= AsmReadCr3 ();
177 VolatileRegisters
->Cr4
= AsmReadCr4 ();
179 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &VersionInfoEdx
.Uint32
);
180 if (VersionInfoEdx
.Bits
.DE
!= 0) {
182 // If processor supports Debugging Extensions feature
183 // by CPUID.[EAX=01H]:EDX.BIT2
185 VolatileRegisters
->Dr0
= AsmReadDr0 ();
186 VolatileRegisters
->Dr1
= AsmReadDr1 ();
187 VolatileRegisters
->Dr2
= AsmReadDr2 ();
188 VolatileRegisters
->Dr3
= AsmReadDr3 ();
189 VolatileRegisters
->Dr6
= AsmReadDr6 ();
190 VolatileRegisters
->Dr7
= AsmReadDr7 ();
193 AsmReadGdtr (&VolatileRegisters
->Gdtr
);
194 AsmReadIdtr (&VolatileRegisters
->Idtr
);
195 VolatileRegisters
->Tr
= AsmReadTr ();
199 Restore the volatile registers following INIT IPI.
201 @param[in] VolatileRegisters Pointer to volatile resisters
202 @param[in] IsRestoreDr TRUE: Restore DRx if supported
203 FALSE: Do not restore DRx
206 RestoreVolatileRegisters (
207 IN CPU_VOLATILE_REGISTERS
*VolatileRegisters
,
208 IN BOOLEAN IsRestoreDr
211 CPUID_VERSION_INFO_EDX VersionInfoEdx
;
212 IA32_TSS_DESCRIPTOR
*Tss
;
214 AsmWriteCr3 (VolatileRegisters
->Cr3
);
215 AsmWriteCr4 (VolatileRegisters
->Cr4
);
216 AsmWriteCr0 (VolatileRegisters
->Cr0
);
219 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &VersionInfoEdx
.Uint32
);
220 if (VersionInfoEdx
.Bits
.DE
!= 0) {
222 // If processor supports Debugging Extensions feature
223 // by CPUID.[EAX=01H]:EDX.BIT2
225 AsmWriteDr0 (VolatileRegisters
->Dr0
);
226 AsmWriteDr1 (VolatileRegisters
->Dr1
);
227 AsmWriteDr2 (VolatileRegisters
->Dr2
);
228 AsmWriteDr3 (VolatileRegisters
->Dr3
);
229 AsmWriteDr6 (VolatileRegisters
->Dr6
);
230 AsmWriteDr7 (VolatileRegisters
->Dr7
);
234 AsmWriteGdtr (&VolatileRegisters
->Gdtr
);
235 AsmWriteIdtr (&VolatileRegisters
->Idtr
);
236 if (VolatileRegisters
->Tr
!= 0 &&
237 VolatileRegisters
->Tr
< VolatileRegisters
->Gdtr
.Limit
) {
238 Tss
= (IA32_TSS_DESCRIPTOR
*)(VolatileRegisters
->Gdtr
.Base
+
239 VolatileRegisters
->Tr
);
240 if (Tss
->Bits
.P
== 1) {
241 Tss
->Bits
.Type
&= 0xD; // 1101 - Clear busy bit just in case
242 AsmWriteTr (VolatileRegisters
->Tr
);
248 Detect whether Mwait-monitor feature is supported.
250 @retval TRUE Mwait-monitor feature is supported.
251 @retval FALSE Mwait-monitor feature is not supported.
258 CPUID_VERSION_INFO_ECX VersionInfoEcx
;
260 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, &VersionInfoEcx
.Uint32
, NULL
);
261 return (VersionInfoEcx
.Bits
.MONITOR
== 1) ? TRUE
: FALSE
;
267 @param[out] MonitorFilterSize Returns the largest monitor-line size in bytes.
269 @return The AP loop mode.
273 OUT UINT32
*MonitorFilterSize
277 CPUID_MONITOR_MWAIT_EBX MonitorMwaitEbx
;
279 ASSERT (MonitorFilterSize
!= NULL
);
281 ApLoopMode
= PcdGet8 (PcdCpuApLoopMode
);
282 ASSERT (ApLoopMode
>= ApInHltLoop
&& ApLoopMode
<= ApInRunLoop
);
283 if (ApLoopMode
== ApInMwaitLoop
) {
284 if (!IsMwaitSupport ()) {
286 // If processor does not support MONITOR/MWAIT feature,
287 // force AP in Hlt-loop mode
289 ApLoopMode
= ApInHltLoop
;
293 if (ApLoopMode
!= ApInMwaitLoop
) {
294 *MonitorFilterSize
= sizeof (UINT32
);
297 // CPUID.[EAX=05H]:EBX.BIT0-15: Largest monitor-line size in bytes
298 // CPUID.[EAX=05H].EDX: C-states supported using MWAIT
300 AsmCpuid (CPUID_MONITOR_MWAIT
, NULL
, &MonitorMwaitEbx
.Uint32
, NULL
, NULL
);
301 *MonitorFilterSize
= MonitorMwaitEbx
.Bits
.LargestMonitorLineSize
;
308 Sort the APIC ID of all processors.
310 This function sorts the APIC ID of all processors so that processor number is
311 assigned in the ascending order of APIC ID which eases MP debugging.
313 @param[in] CpuMpData Pointer to PEI CPU MP Data
317 IN CPU_MP_DATA
*CpuMpData
324 CPU_INFO_IN_HOB CpuInfo
;
326 CPU_INFO_IN_HOB
*CpuInfoInHob
;
327 volatile UINT32
*StartupApSignal
;
329 ApCount
= CpuMpData
->CpuCount
- 1;
330 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
332 for (Index1
= 0; Index1
< ApCount
; Index1
++) {
335 // Sort key is the hardware default APIC ID
337 ApicId
= CpuInfoInHob
[Index1
].ApicId
;
338 for (Index2
= Index1
+ 1; Index2
<= ApCount
; Index2
++) {
339 if (ApicId
> CpuInfoInHob
[Index2
].ApicId
) {
341 ApicId
= CpuInfoInHob
[Index2
].ApicId
;
344 if (Index3
!= Index1
) {
345 CopyMem (&CpuInfo
, &CpuInfoInHob
[Index3
], sizeof (CPU_INFO_IN_HOB
));
347 &CpuInfoInHob
[Index3
],
348 &CpuInfoInHob
[Index1
],
349 sizeof (CPU_INFO_IN_HOB
)
351 CopyMem (&CpuInfoInHob
[Index1
], &CpuInfo
, sizeof (CPU_INFO_IN_HOB
));
354 // Also exchange the StartupApSignal.
356 StartupApSignal
= CpuMpData
->CpuData
[Index3
].StartupApSignal
;
357 CpuMpData
->CpuData
[Index3
].StartupApSignal
=
358 CpuMpData
->CpuData
[Index1
].StartupApSignal
;
359 CpuMpData
->CpuData
[Index1
].StartupApSignal
= StartupApSignal
;
364 // Get the processor number for the BSP
366 ApicId
= GetInitialApicId ();
367 for (Index1
= 0; Index1
< CpuMpData
->CpuCount
; Index1
++) {
368 if (CpuInfoInHob
[Index1
].ApicId
== ApicId
) {
369 CpuMpData
->BspNumber
= (UINT32
) Index1
;
377 Enable x2APIC mode on APs.
379 @param[in, out] Buffer Pointer to private data buffer.
387 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
393 @param[in, out] Buffer Pointer to private data buffer.
401 CPU_MP_DATA
*CpuMpData
;
403 CpuMpData
= (CPU_MP_DATA
*) Buffer
;
405 // Load microcode on AP
407 MicrocodeDetect (CpuMpData
, FALSE
);
409 // Sync BSP's MTRR table to AP
411 MtrrSetAllMtrrs (&CpuMpData
->MtrrTable
);
415 Find the current Processor number by APIC ID.
417 @param[in] CpuMpData Pointer to PEI CPU MP Data
418 @param[out] ProcessorNumber Return the pocessor number found
420 @retval EFI_SUCCESS ProcessorNumber is found and returned.
421 @retval EFI_NOT_FOUND ProcessorNumber is not found.
425 IN CPU_MP_DATA
*CpuMpData
,
426 OUT UINTN
*ProcessorNumber
429 UINTN TotalProcessorNumber
;
431 CPU_INFO_IN_HOB
*CpuInfoInHob
;
432 UINT32 CurrentApicId
;
434 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
436 TotalProcessorNumber
= CpuMpData
->CpuCount
;
437 CurrentApicId
= GetApicId ();
438 for (Index
= 0; Index
< TotalProcessorNumber
; Index
++) {
439 if (CpuInfoInHob
[Index
].ApicId
== CurrentApicId
) {
440 *ProcessorNumber
= Index
;
445 return EFI_NOT_FOUND
;
449 This function will get CPU count in the system.
451 @param[in] CpuMpData Pointer to PEI CPU MP Data
453 @return CPU count detected
456 CollectProcessorCount (
457 IN CPU_MP_DATA
*CpuMpData
463 // Send 1st broadcast IPI to APs to wakeup APs
465 CpuMpData
->InitFlag
= ApInitConfig
;
466 CpuMpData
->X2ApicEnable
= FALSE
;
467 WakeUpAP (CpuMpData
, TRUE
, 0, NULL
, NULL
, TRUE
);
468 CpuMpData
->InitFlag
= ApInitDone
;
469 ASSERT (CpuMpData
->CpuCount
<= PcdGet32 (PcdCpuMaxLogicalProcessorNumber
));
471 // Wait for all APs finished the initialization
473 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
477 if (CpuMpData
->CpuCount
> 255) {
479 // If there are more than 255 processor found, force to enable X2APIC
481 CpuMpData
->X2ApicEnable
= TRUE
;
483 if (CpuMpData
->X2ApicEnable
) {
484 DEBUG ((DEBUG_INFO
, "Force x2APIC mode!\n"));
486 // Wakeup all APs to enable x2APIC mode
488 WakeUpAP (CpuMpData
, TRUE
, 0, ApFuncEnableX2Apic
, NULL
, TRUE
);
490 // Wait for all known APs finished
492 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
496 // Enable x2APIC on BSP
498 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
500 // Set BSP/Aps state to IDLE
502 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
503 SetApState (&CpuMpData
->CpuData
[Index
], CpuStateIdle
);
506 DEBUG ((DEBUG_INFO
, "APIC MODE is %d\n", GetApicMode ()));
508 // Sort BSP/Aps by CPU APIC ID in ascending order
510 SortApicId (CpuMpData
);
512 DEBUG ((DEBUG_INFO
, "MpInitLib: Find %d processors in system.\n", CpuMpData
->CpuCount
));
514 return CpuMpData
->CpuCount
;
518 Initialize CPU AP Data when AP is wakeup at the first time.
520 @param[in, out] CpuMpData Pointer to PEI CPU MP Data
521 @param[in] ProcessorNumber The handle number of processor
522 @param[in] BistData Processor BIST data
523 @param[in] ApTopOfStack Top of AP stack
528 IN OUT CPU_MP_DATA
*CpuMpData
,
529 IN UINTN ProcessorNumber
,
531 IN UINT64 ApTopOfStack
534 CPU_INFO_IN_HOB
*CpuInfoInHob
;
536 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
537 CpuInfoInHob
[ProcessorNumber
].InitialApicId
= GetInitialApicId ();
538 CpuInfoInHob
[ProcessorNumber
].ApicId
= GetApicId ();
539 CpuInfoInHob
[ProcessorNumber
].Health
= BistData
;
540 CpuInfoInHob
[ProcessorNumber
].ApTopOfStack
= ApTopOfStack
;
542 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
543 CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
= (BistData
== 0) ? TRUE
: FALSE
;
544 if (CpuInfoInHob
[ProcessorNumber
].InitialApicId
>= 0xFF) {
546 // Set x2APIC mode if there are any logical processor reporting
547 // an Initial APIC ID of 255 or greater.
549 AcquireSpinLock(&CpuMpData
->MpLock
);
550 CpuMpData
->X2ApicEnable
= TRUE
;
551 ReleaseSpinLock(&CpuMpData
->MpLock
);
554 InitializeSpinLock(&CpuMpData
->CpuData
[ProcessorNumber
].ApLock
);
555 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateIdle
);
559 This function will be called from AP reset code if BSP uses WakeUpAP.
561 @param[in] ExchangeInfo Pointer to the MP exchange info buffer
562 @param[in] ApIndex Number of current executing AP
567 IN MP_CPU_EXCHANGE_INFO
*ExchangeInfo
,
571 CPU_MP_DATA
*CpuMpData
;
572 UINTN ProcessorNumber
;
573 EFI_AP_PROCEDURE Procedure
;
576 volatile UINT32
*ApStartupSignalBuffer
;
577 CPU_INFO_IN_HOB
*CpuInfoInHob
;
579 UINTN CurrentApicMode
;
582 // AP finished assembly code and begin to execute C code
584 CpuMpData
= ExchangeInfo
->CpuMpData
;
587 // AP's local APIC settings will be lost after received INIT IPI
588 // We need to re-initialize them at here
590 ProgramVirtualWireMode ();
592 // Mask the LINT0 and LINT1 so that AP doesn't enter the system timer interrupt handler.
594 DisableLvtInterrupts ();
595 SyncLocalApicTimerSetting (CpuMpData
);
597 CurrentApicMode
= GetApicMode ();
599 if (CpuMpData
->InitFlag
== ApInitConfig
) {
603 InterlockedIncrement ((UINT32
*) &CpuMpData
->CpuCount
);
604 ProcessorNumber
= ApIndex
;
606 // This is first time AP wakeup, get BIST information from AP stack
608 ApTopOfStack
= CpuMpData
->Buffer
+ (ProcessorNumber
+ 1) * CpuMpData
->CpuApStackSize
;
609 BistData
= *(UINT32
*) ((UINTN
) ApTopOfStack
- sizeof (UINTN
));
611 // Do some AP initialize sync
613 ApInitializeSync (CpuMpData
);
615 // CpuMpData->CpuData[0].VolatileRegisters is initialized based on BSP environment,
616 // to initialize AP in InitConfig path.
617 // NOTE: IDTR.BASE stored in CpuMpData->CpuData[0].VolatileRegisters points to a different IDT shared by all APs.
619 RestoreVolatileRegisters (&CpuMpData
->CpuData
[0].VolatileRegisters
, FALSE
);
620 InitializeApData (CpuMpData
, ProcessorNumber
, BistData
, ApTopOfStack
);
621 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
624 // Execute AP function if AP is ready
626 GetProcessorNumber (CpuMpData
, &ProcessorNumber
);
628 // Clear AP start-up signal when AP waken up
630 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
631 InterlockedCompareExchange32 (
632 (UINT32
*) ApStartupSignalBuffer
,
636 if (CpuMpData
->ApLoopMode
== ApInHltLoop
) {
638 // Restore AP's volatile registers saved
640 RestoreVolatileRegisters (&CpuMpData
->CpuData
[ProcessorNumber
].VolatileRegisters
, TRUE
);
643 // The CPU driver might not flush TLB for APs on spot after updating
644 // page attributes. AP in mwait loop mode needs to take care of it when
650 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateReady
) {
651 Procedure
= (EFI_AP_PROCEDURE
)CpuMpData
->CpuData
[ProcessorNumber
].ApFunction
;
652 Parameter
= (VOID
*) CpuMpData
->CpuData
[ProcessorNumber
].ApFunctionArgument
;
653 if (Procedure
!= NULL
) {
654 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateBusy
);
656 // Enable source debugging on AP function
660 // Invoke AP function here
662 Procedure (Parameter
);
663 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
664 if (CpuMpData
->SwitchBspFlag
) {
666 // Re-get the processor number due to BSP/AP maybe exchange in AP function
668 GetProcessorNumber (CpuMpData
, &ProcessorNumber
);
669 CpuMpData
->CpuData
[ProcessorNumber
].ApFunction
= 0;
670 CpuMpData
->CpuData
[ProcessorNumber
].ApFunctionArgument
= 0;
671 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
672 CpuInfoInHob
[ProcessorNumber
].ApTopOfStack
= CpuInfoInHob
[CpuMpData
->NewBspNumber
].ApTopOfStack
;
674 if (CpuInfoInHob
[ProcessorNumber
].ApicId
!= GetApicId () ||
675 CpuInfoInHob
[ProcessorNumber
].InitialApicId
!= GetInitialApicId ()) {
676 if (CurrentApicMode
!= GetApicMode ()) {
678 // If APIC mode change happened during AP function execution,
679 // we do not support APIC ID value changed.
685 // Re-get the CPU APICID and Initial APICID if they are changed
687 CpuInfoInHob
[ProcessorNumber
].ApicId
= GetApicId ();
688 CpuInfoInHob
[ProcessorNumber
].InitialApicId
= GetInitialApicId ();
693 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateFinished
);
698 // AP finished executing C code
700 InterlockedIncrement ((UINT32
*) &CpuMpData
->FinishedCount
);
701 InterlockedDecrement ((UINT32
*) &CpuMpData
->MpCpuExchangeInfo
->NumApsExecuting
);
704 // Place AP is specified loop mode
706 if (CpuMpData
->ApLoopMode
== ApInHltLoop
) {
708 // Save AP volatile registers
710 SaveVolatileRegisters (&CpuMpData
->CpuData
[ProcessorNumber
].VolatileRegisters
);
712 // Place AP in HLT-loop
715 DisableInterrupts ();
721 DisableInterrupts ();
722 if (CpuMpData
->ApLoopMode
== ApInMwaitLoop
) {
724 // Place AP in MWAIT-loop
726 AsmMonitor ((UINTN
) ApStartupSignalBuffer
, 0, 0);
727 if (*ApStartupSignalBuffer
!= WAKEUP_AP_SIGNAL
) {
729 // Check AP start-up signal again.
730 // If AP start-up signal is not set, place AP into
731 // the specified C-state
733 AsmMwait (CpuMpData
->ApTargetCState
<< 4, 0);
735 } else if (CpuMpData
->ApLoopMode
== ApInRunLoop
) {
737 // Place AP in Run-loop
745 // If AP start-up signal is written, AP is waken up
746 // otherwise place AP in loop again
748 if (*ApStartupSignalBuffer
== WAKEUP_AP_SIGNAL
) {
756 Wait for AP wakeup and write AP start-up signal till AP is waken up.
758 @param[in] ApStartupSignalBuffer Pointer to AP wakeup signal
762 IN
volatile UINT32
*ApStartupSignalBuffer
766 // If AP is waken up, StartupApSignal should be cleared.
767 // Otherwise, write StartupApSignal again till AP waken up.
769 while (InterlockedCompareExchange32 (
770 (UINT32
*) ApStartupSignalBuffer
,
779 This function will fill the exchange info structure.
781 @param[in] CpuMpData Pointer to CPU MP Data
785 FillExchangeInfoData (
786 IN CPU_MP_DATA
*CpuMpData
789 volatile MP_CPU_EXCHANGE_INFO
*ExchangeInfo
;
791 IA32_SEGMENT_DESCRIPTOR
*Selector
;
793 ExchangeInfo
= CpuMpData
->MpCpuExchangeInfo
;
794 ExchangeInfo
->Lock
= 0;
795 ExchangeInfo
->StackStart
= CpuMpData
->Buffer
;
796 ExchangeInfo
->StackSize
= CpuMpData
->CpuApStackSize
;
797 ExchangeInfo
->BufferStart
= CpuMpData
->WakeupBuffer
;
798 ExchangeInfo
->ModeOffset
= CpuMpData
->AddressMap
.ModeEntryOffset
;
800 ExchangeInfo
->CodeSegment
= AsmReadCs ();
801 ExchangeInfo
->DataSegment
= AsmReadDs ();
803 ExchangeInfo
->Cr3
= AsmReadCr3 ();
805 ExchangeInfo
->CFunction
= (UINTN
) ApWakeupFunction
;
806 ExchangeInfo
->ApIndex
= 0;
807 ExchangeInfo
->NumApsExecuting
= 0;
808 ExchangeInfo
->InitFlag
= (UINTN
) CpuMpData
->InitFlag
;
809 ExchangeInfo
->CpuInfo
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
810 ExchangeInfo
->CpuMpData
= CpuMpData
;
812 ExchangeInfo
->EnableExecuteDisable
= IsBspExecuteDisableEnabled ();
814 ExchangeInfo
->InitializeFloatingPointUnitsAddress
= (UINTN
)InitializeFloatingPointUnits
;
817 // Get the BSP's data of GDT and IDT
819 AsmReadGdtr ((IA32_DESCRIPTOR
*) &ExchangeInfo
->GdtrProfile
);
820 AsmReadIdtr ((IA32_DESCRIPTOR
*) &ExchangeInfo
->IdtrProfile
);
823 // Find a 32-bit code segment
825 Selector
= (IA32_SEGMENT_DESCRIPTOR
*)ExchangeInfo
->GdtrProfile
.Base
;
826 Size
= ExchangeInfo
->GdtrProfile
.Limit
+ 1;
828 if (Selector
->Bits
.L
== 0 && Selector
->Bits
.Type
>= 8) {
829 ExchangeInfo
->ModeTransitionSegment
=
830 (UINT16
)((UINTN
)Selector
- ExchangeInfo
->GdtrProfile
.Base
);
834 Size
-= sizeof (IA32_SEGMENT_DESCRIPTOR
);
838 // Copy all 32-bit code and 64-bit code into memory with type of
839 // EfiBootServicesCode to avoid page fault if NX memory protection is enabled.
841 if (CpuMpData
->WakeupBufferHigh
!= 0) {
842 Size
= CpuMpData
->AddressMap
.RendezvousFunnelSize
-
843 CpuMpData
->AddressMap
.ModeTransitionOffset
;
845 (VOID
*)CpuMpData
->WakeupBufferHigh
,
846 CpuMpData
->AddressMap
.RendezvousFunnelAddress
+
847 CpuMpData
->AddressMap
.ModeTransitionOffset
,
851 ExchangeInfo
->ModeTransitionMemory
= (UINT32
)CpuMpData
->WakeupBufferHigh
;
853 ExchangeInfo
->ModeTransitionMemory
= (UINT32
)
854 (ExchangeInfo
->BufferStart
+ CpuMpData
->AddressMap
.ModeTransitionOffset
);
857 ExchangeInfo
->ModeHighMemory
= ExchangeInfo
->ModeTransitionMemory
+
858 (UINT32
)ExchangeInfo
->ModeOffset
-
859 (UINT32
)CpuMpData
->AddressMap
.ModeTransitionOffset
;
860 ExchangeInfo
->ModeHighSegment
= (UINT16
)ExchangeInfo
->CodeSegment
;
864 Helper function that waits until the finished AP count reaches the specified
865 limit, or the specified timeout elapses (whichever comes first).
867 @param[in] CpuMpData Pointer to CPU MP Data.
868 @param[in] FinishedApLimit The number of finished APs to wait for.
869 @param[in] TimeLimit The number of microseconds to wait for.
872 TimedWaitForApFinish (
873 IN CPU_MP_DATA
*CpuMpData
,
874 IN UINT32 FinishedApLimit
,
879 Get available system memory below 1MB by specified size.
881 @param[in] CpuMpData The pointer to CPU MP Data structure.
884 BackupAndPrepareWakeupBuffer(
885 IN CPU_MP_DATA
*CpuMpData
889 (VOID
*) CpuMpData
->BackupBuffer
,
890 (VOID
*) CpuMpData
->WakeupBuffer
,
891 CpuMpData
->BackupBufferSize
894 (VOID
*) CpuMpData
->WakeupBuffer
,
895 (VOID
*) CpuMpData
->AddressMap
.RendezvousFunnelAddress
,
896 CpuMpData
->AddressMap
.RendezvousFunnelSize
901 Restore wakeup buffer data.
903 @param[in] CpuMpData The pointer to CPU MP Data structure.
907 IN CPU_MP_DATA
*CpuMpData
911 (VOID
*) CpuMpData
->WakeupBuffer
,
912 (VOID
*) CpuMpData
->BackupBuffer
,
913 CpuMpData
->BackupBufferSize
918 Allocate reset vector buffer.
920 @param[in, out] CpuMpData The pointer to CPU MP Data structure.
923 AllocateResetVector (
924 IN OUT CPU_MP_DATA
*CpuMpData
927 UINTN ApResetVectorSize
;
929 if (CpuMpData
->WakeupBuffer
== (UINTN
) -1) {
930 ApResetVectorSize
= CpuMpData
->AddressMap
.RendezvousFunnelSize
+
931 sizeof (MP_CPU_EXCHANGE_INFO
);
933 CpuMpData
->WakeupBuffer
= GetWakeupBuffer (ApResetVectorSize
);
934 CpuMpData
->MpCpuExchangeInfo
= (MP_CPU_EXCHANGE_INFO
*) (UINTN
)
935 (CpuMpData
->WakeupBuffer
+ CpuMpData
->AddressMap
.RendezvousFunnelSize
);
936 CpuMpData
->WakeupBufferHigh
= GetModeTransitionBuffer (
937 CpuMpData
->AddressMap
.RendezvousFunnelSize
-
938 CpuMpData
->AddressMap
.ModeTransitionOffset
941 BackupAndPrepareWakeupBuffer (CpuMpData
);
945 Free AP reset vector buffer.
947 @param[in] CpuMpData The pointer to CPU MP Data structure.
951 IN CPU_MP_DATA
*CpuMpData
954 RestoreWakeupBuffer (CpuMpData
);
958 This function will be called by BSP to wakeup AP.
960 @param[in] CpuMpData Pointer to CPU MP Data
961 @param[in] Broadcast TRUE: Send broadcast IPI to all APs
962 FALSE: Send IPI to AP by ApicId
963 @param[in] ProcessorNumber The handle number of specified processor
964 @param[in] Procedure The function to be invoked by AP
965 @param[in] ProcedureArgument The argument to be passed into AP function
966 @param[in] WakeUpDisabledAps Whether need to wake up disabled APs in broadcast mode.
970 IN CPU_MP_DATA
*CpuMpData
,
971 IN BOOLEAN Broadcast
,
972 IN UINTN ProcessorNumber
,
973 IN EFI_AP_PROCEDURE Procedure
, OPTIONAL
974 IN VOID
*ProcedureArgument
, OPTIONAL
975 IN BOOLEAN WakeUpDisabledAps
978 volatile MP_CPU_EXCHANGE_INFO
*ExchangeInfo
;
980 CPU_AP_DATA
*CpuData
;
981 BOOLEAN ResetVectorRequired
;
982 CPU_INFO_IN_HOB
*CpuInfoInHob
;
984 CpuMpData
->FinishedCount
= 0;
985 ResetVectorRequired
= FALSE
;
987 if (CpuMpData
->WakeUpByInitSipiSipi
||
988 CpuMpData
->InitFlag
!= ApInitDone
) {
989 ResetVectorRequired
= TRUE
;
990 AllocateResetVector (CpuMpData
);
991 FillExchangeInfoData (CpuMpData
);
992 SaveLocalApicTimerSetting (CpuMpData
);
995 if (CpuMpData
->ApLoopMode
== ApInMwaitLoop
) {
997 // Get AP target C-state each time when waking up AP,
998 // for it maybe updated by platform again
1000 CpuMpData
->ApTargetCState
= PcdGet8 (PcdCpuApTargetCstate
);
1003 ExchangeInfo
= CpuMpData
->MpCpuExchangeInfo
;
1006 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1007 if (Index
!= CpuMpData
->BspNumber
) {
1008 CpuData
= &CpuMpData
->CpuData
[Index
];
1010 // All AP(include disabled AP) will be woke up by INIT-SIPI-SIPI, but
1011 // the AP procedure will be skipped for disabled AP because AP state
1012 // is not CpuStateReady.
1014 if (GetApState (CpuData
) == CpuStateDisabled
&& !WakeUpDisabledAps
) {
1018 CpuData
->ApFunction
= (UINTN
) Procedure
;
1019 CpuData
->ApFunctionArgument
= (UINTN
) ProcedureArgument
;
1020 SetApState (CpuData
, CpuStateReady
);
1021 if (CpuMpData
->InitFlag
!= ApInitConfig
) {
1022 *(UINT32
*) CpuData
->StartupApSignal
= WAKEUP_AP_SIGNAL
;
1026 if (ResetVectorRequired
) {
1030 SendInitSipiSipiAllExcludingSelf ((UINT32
) ExchangeInfo
->BufferStart
);
1032 if (CpuMpData
->InitFlag
== ApInitConfig
) {
1034 // Here support two methods to collect AP count through adjust
1035 // PcdCpuApInitTimeOutInMicroSeconds values.
1037 // one way is set a value to just let the first AP to start the
1038 // initialization, then through the later while loop to wait all Aps
1039 // finsh the initialization.
1040 // The other way is set a value to let all APs finished the initialzation.
1041 // In this case, the later while loop is useless.
1043 TimedWaitForApFinish (
1045 PcdGet32 (PcdCpuMaxLogicalProcessorNumber
) - 1,
1046 PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds
)
1049 while (CpuMpData
->MpCpuExchangeInfo
->NumApsExecuting
!= 0) {
1054 // Wait all APs waken up if this is not the 1st broadcast of SIPI
1056 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1057 CpuData
= &CpuMpData
->CpuData
[Index
];
1058 if (Index
!= CpuMpData
->BspNumber
) {
1059 WaitApWakeup (CpuData
->StartupApSignal
);
1064 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1065 CpuData
->ApFunction
= (UINTN
) Procedure
;
1066 CpuData
->ApFunctionArgument
= (UINTN
) ProcedureArgument
;
1067 SetApState (CpuData
, CpuStateReady
);
1069 // Wakeup specified AP
1071 ASSERT (CpuMpData
->InitFlag
!= ApInitConfig
);
1072 *(UINT32
*) CpuData
->StartupApSignal
= WAKEUP_AP_SIGNAL
;
1073 if (ResetVectorRequired
) {
1074 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1076 CpuInfoInHob
[ProcessorNumber
].ApicId
,
1077 (UINT32
) ExchangeInfo
->BufferStart
1081 // Wait specified AP waken up
1083 WaitApWakeup (CpuData
->StartupApSignal
);
1086 if (ResetVectorRequired
) {
1087 FreeResetVector (CpuMpData
);
1091 // After one round of Wakeup Ap actions, need to re-sync ApLoopMode with
1092 // WakeUpByInitSipiSipi flag. WakeUpByInitSipiSipi flag maybe changed by
1093 // S3SmmInitDone Ppi.
1095 CpuMpData
->WakeUpByInitSipiSipi
= (CpuMpData
->ApLoopMode
== ApInHltLoop
);
1099 Calculate timeout value and return the current performance counter value.
1101 Calculate the number of performance counter ticks required for a timeout.
1102 If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1105 @param[in] TimeoutInMicroseconds Timeout value in microseconds.
1106 @param[out] CurrentTime Returns the current value of the performance counter.
1108 @return Expected time stamp counter for timeout.
1109 If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1115 IN UINTN TimeoutInMicroseconds
,
1116 OUT UINT64
*CurrentTime
1119 UINT64 TimeoutInSeconds
;
1120 UINT64 TimestampCounterFreq
;
1123 // Read the current value of the performance counter
1125 *CurrentTime
= GetPerformanceCounter ();
1128 // If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1131 if (TimeoutInMicroseconds
== 0) {
1136 // GetPerformanceCounterProperties () returns the timestamp counter's frequency
1139 TimestampCounterFreq
= GetPerformanceCounterProperties (NULL
, NULL
);
1142 // Check the potential overflow before calculate the number of ticks for the timeout value.
1144 if (DivU64x64Remainder (MAX_UINT64
, TimeoutInMicroseconds
, NULL
) < TimestampCounterFreq
) {
1146 // Convert microseconds into seconds if direct multiplication overflows
1148 TimeoutInSeconds
= DivU64x32 (TimeoutInMicroseconds
, 1000000);
1150 // Assertion if the final tick count exceeds MAX_UINT64
1152 ASSERT (DivU64x64Remainder (MAX_UINT64
, TimeoutInSeconds
, NULL
) >= TimestampCounterFreq
);
1153 return MultU64x64 (TimestampCounterFreq
, TimeoutInSeconds
);
1156 // No overflow case, multiply the return value with TimeoutInMicroseconds and then divide
1157 // it by 1,000,000, to get the number of ticks for the timeout value.
1161 TimestampCounterFreq
,
1162 TimeoutInMicroseconds
1170 Checks whether timeout expires.
1172 Check whether the number of elapsed performance counter ticks required for
1173 a timeout condition has been reached.
1174 If Timeout is zero, which means infinity, return value is always FALSE.
1176 @param[in, out] PreviousTime On input, the value of the performance counter
1177 when it was last read.
1178 On output, the current value of the performance
1180 @param[in] TotalTime The total amount of elapsed time in performance
1182 @param[in] Timeout The number of performance counter ticks required
1183 to reach a timeout condition.
1185 @retval TRUE A timeout condition has been reached.
1186 @retval FALSE A timeout condition has not been reached.
1191 IN OUT UINT64
*PreviousTime
,
1192 IN UINT64
*TotalTime
,
1205 GetPerformanceCounterProperties (&Start
, &End
);
1206 Cycle
= End
- Start
;
1211 CurrentTime
= GetPerformanceCounter();
1212 Delta
= (INT64
) (CurrentTime
- *PreviousTime
);
1219 *TotalTime
+= Delta
;
1220 *PreviousTime
= CurrentTime
;
1221 if (*TotalTime
> Timeout
) {
1228 Helper function that waits until the finished AP count reaches the specified
1229 limit, or the specified timeout elapses (whichever comes first).
1231 @param[in] CpuMpData Pointer to CPU MP Data.
1232 @param[in] FinishedApLimit The number of finished APs to wait for.
1233 @param[in] TimeLimit The number of microseconds to wait for.
1236 TimedWaitForApFinish (
1237 IN CPU_MP_DATA
*CpuMpData
,
1238 IN UINT32 FinishedApLimit
,
1243 // CalculateTimeout() and CheckTimeout() consider a TimeLimit of 0
1244 // "infinity", so check for (TimeLimit == 0) explicitly.
1246 if (TimeLimit
== 0) {
1250 CpuMpData
->TotalTime
= 0;
1251 CpuMpData
->ExpectedTime
= CalculateTimeout (
1253 &CpuMpData
->CurrentTime
1255 while (CpuMpData
->FinishedCount
< FinishedApLimit
&&
1257 &CpuMpData
->CurrentTime
,
1258 &CpuMpData
->TotalTime
,
1259 CpuMpData
->ExpectedTime
1264 if (CpuMpData
->FinishedCount
>= FinishedApLimit
) {
1267 "%a: reached FinishedApLimit=%u in %Lu microseconds\n",
1270 DivU64x64Remainder (
1271 MultU64x32 (CpuMpData
->TotalTime
, 1000000),
1272 GetPerformanceCounterProperties (NULL
, NULL
),
1280 Reset an AP to Idle state.
1282 Any task being executed by the AP will be aborted and the AP
1283 will be waiting for a new task in Wait-For-SIPI state.
1285 @param[in] ProcessorNumber The handle number of processor.
1288 ResetProcessorToIdleState (
1289 IN UINTN ProcessorNumber
1292 CPU_MP_DATA
*CpuMpData
;
1294 CpuMpData
= GetCpuMpData ();
1296 CpuMpData
->InitFlag
= ApInitReconfig
;
1297 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, NULL
, NULL
, TRUE
);
1298 while (CpuMpData
->FinishedCount
< 1) {
1301 CpuMpData
->InitFlag
= ApInitDone
;
1303 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateIdle
);
1307 Searches for the next waiting AP.
1309 Search for the next AP that is put in waiting state by single-threaded StartupAllAPs().
1311 @param[out] NextProcessorNumber Pointer to the processor number of the next waiting AP.
1313 @retval EFI_SUCCESS The next waiting AP has been found.
1314 @retval EFI_NOT_FOUND No waiting AP exists.
1318 GetNextWaitingProcessorNumber (
1319 OUT UINTN
*NextProcessorNumber
1322 UINTN ProcessorNumber
;
1323 CPU_MP_DATA
*CpuMpData
;
1325 CpuMpData
= GetCpuMpData ();
1327 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1328 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1329 *NextProcessorNumber
= ProcessorNumber
;
1334 return EFI_NOT_FOUND
;
1337 /** Checks status of specified AP.
1339 This function checks whether the specified AP has finished the task assigned
1340 by StartupThisAP(), and whether timeout expires.
1342 @param[in] ProcessorNumber The handle number of processor.
1344 @retval EFI_SUCCESS Specified AP has finished task assigned by StartupThisAPs().
1345 @retval EFI_TIMEOUT The timeout expires.
1346 @retval EFI_NOT_READY Specified AP has not finished task and timeout has not expired.
1350 IN UINTN ProcessorNumber
1353 CPU_MP_DATA
*CpuMpData
;
1354 CPU_AP_DATA
*CpuData
;
1356 CpuMpData
= GetCpuMpData ();
1357 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1360 // Check the CPU state of AP. If it is CpuStateIdle, then the AP has finished its task.
1361 // Only BSP and corresponding AP access this unit of CPU Data. This means the AP will not modify the
1362 // value of state after setting the it to CpuStateIdle, so BSP can safely make use of its value.
1365 // If the AP finishes for StartupThisAP(), return EFI_SUCCESS.
1367 if (GetApState(CpuData
) == CpuStateFinished
) {
1368 if (CpuData
->Finished
!= NULL
) {
1369 *(CpuData
->Finished
) = TRUE
;
1371 SetApState (CpuData
, CpuStateIdle
);
1375 // If timeout expires for StartupThisAP(), report timeout.
1377 if (CheckTimeout (&CpuData
->CurrentTime
, &CpuData
->TotalTime
, CpuData
->ExpectedTime
)) {
1378 if (CpuData
->Finished
!= NULL
) {
1379 *(CpuData
->Finished
) = FALSE
;
1382 // Reset failed AP to idle state
1384 ResetProcessorToIdleState (ProcessorNumber
);
1389 return EFI_NOT_READY
;
1393 Checks status of all APs.
1395 This function checks whether all APs have finished task assigned by StartupAllAPs(),
1396 and whether timeout expires.
1398 @retval EFI_SUCCESS All APs have finished task assigned by StartupAllAPs().
1399 @retval EFI_TIMEOUT The timeout expires.
1400 @retval EFI_NOT_READY APs have not finished task and timeout has not expired.
1407 UINTN ProcessorNumber
;
1408 UINTN NextProcessorNumber
;
1411 CPU_MP_DATA
*CpuMpData
;
1412 CPU_AP_DATA
*CpuData
;
1414 CpuMpData
= GetCpuMpData ();
1416 NextProcessorNumber
= 0;
1419 // Go through all APs that are responsible for the StartupAllAPs().
1421 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1422 if (!CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1426 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1428 // Check the CPU state of AP. If it is CpuStateIdle, then the AP has finished its task.
1429 // Only BSP and corresponding AP access this unit of CPU Data. This means the AP will not modify the
1430 // value of state after setting the it to CpuStateIdle, so BSP can safely make use of its value.
1432 if (GetApState(CpuData
) == CpuStateFinished
) {
1433 CpuMpData
->RunningCount
--;
1434 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
1435 SetApState(CpuData
, CpuStateIdle
);
1438 // If in Single Thread mode, then search for the next waiting AP for execution.
1440 if (CpuMpData
->SingleThread
) {
1441 Status
= GetNextWaitingProcessorNumber (&NextProcessorNumber
);
1443 if (!EFI_ERROR (Status
)) {
1447 (UINT32
) NextProcessorNumber
,
1448 CpuMpData
->Procedure
,
1449 CpuMpData
->ProcArguments
,
1458 // If all APs finish, return EFI_SUCCESS.
1460 if (CpuMpData
->RunningCount
== 0) {
1465 // If timeout expires, report timeout.
1468 &CpuMpData
->CurrentTime
,
1469 &CpuMpData
->TotalTime
,
1470 CpuMpData
->ExpectedTime
)
1473 // If FailedCpuList is not NULL, record all failed APs in it.
1475 if (CpuMpData
->FailedCpuList
!= NULL
) {
1476 *CpuMpData
->FailedCpuList
=
1477 AllocatePool ((CpuMpData
->RunningCount
+ 1) * sizeof (UINTN
));
1478 ASSERT (*CpuMpData
->FailedCpuList
!= NULL
);
1482 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1484 // Check whether this processor is responsible for StartupAllAPs().
1486 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1488 // Reset failed APs to idle state
1490 ResetProcessorToIdleState (ProcessorNumber
);
1491 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
1492 if (CpuMpData
->FailedCpuList
!= NULL
) {
1493 (*CpuMpData
->FailedCpuList
)[ListIndex
++] = ProcessorNumber
;
1497 if (CpuMpData
->FailedCpuList
!= NULL
) {
1498 (*CpuMpData
->FailedCpuList
)[ListIndex
] = END_OF_CPU_LIST
;
1502 return EFI_NOT_READY
;
1506 MP Initialize Library initialization.
1508 This service will allocate AP reset vector and wakeup all APs to do APs
1511 This service must be invoked before all other MP Initialize Library
1512 service are invoked.
1514 @retval EFI_SUCCESS MP initialization succeeds.
1515 @retval Others MP initialization fails.
1520 MpInitLibInitialize (
1524 CPU_MP_DATA
*OldCpuMpData
;
1525 CPU_INFO_IN_HOB
*CpuInfoInHob
;
1526 UINT32 MaxLogicalProcessorNumber
;
1528 MP_ASSEMBLY_ADDRESS_MAP AddressMap
;
1529 CPU_VOLATILE_REGISTERS VolatileRegisters
;
1531 UINT32 MonitorFilterSize
;
1534 CPU_MP_DATA
*CpuMpData
;
1536 UINT8
*MonitorBuffer
;
1538 UINTN ApResetVectorSize
;
1539 UINTN BackupBufferAddr
;
1541 VOID
*MicrocodePatchInRam
;
1543 OldCpuMpData
= GetCpuMpDataFromGuidedHob ();
1544 if (OldCpuMpData
== NULL
) {
1545 MaxLogicalProcessorNumber
= PcdGet32(PcdCpuMaxLogicalProcessorNumber
);
1547 MaxLogicalProcessorNumber
= OldCpuMpData
->CpuCount
;
1549 ASSERT (MaxLogicalProcessorNumber
!= 0);
1551 AsmGetAddressMap (&AddressMap
);
1552 ApResetVectorSize
= AddressMap
.RendezvousFunnelSize
+ sizeof (MP_CPU_EXCHANGE_INFO
);
1553 ApStackSize
= PcdGet32(PcdCpuApStackSize
);
1554 ApLoopMode
= GetApLoopMode (&MonitorFilterSize
);
1557 // Save BSP's Control registers for APs.
1559 SaveVolatileRegisters (&VolatileRegisters
);
1561 BufferSize
= ApStackSize
* MaxLogicalProcessorNumber
;
1562 BufferSize
+= MonitorFilterSize
* MaxLogicalProcessorNumber
;
1563 BufferSize
+= ApResetVectorSize
;
1564 BufferSize
= ALIGN_VALUE (BufferSize
, 8);
1565 BufferSize
+= VolatileRegisters
.Idtr
.Limit
+ 1;
1566 BufferSize
+= sizeof (CPU_MP_DATA
);
1567 BufferSize
+= (sizeof (CPU_AP_DATA
) + sizeof (CPU_INFO_IN_HOB
))* MaxLogicalProcessorNumber
;
1568 MpBuffer
= AllocatePages (EFI_SIZE_TO_PAGES (BufferSize
));
1569 ASSERT (MpBuffer
!= NULL
);
1570 ZeroMem (MpBuffer
, BufferSize
);
1571 Buffer
= (UINTN
) MpBuffer
;
1574 // The layout of the Buffer is as below:
1576 // +--------------------+ <-- Buffer
1578 // +--------------------+ <-- MonitorBuffer
1579 // AP Monitor Filters (N)
1580 // +--------------------+ <-- BackupBufferAddr (CpuMpData->BackupBuffer)
1582 // +--------------------+
1584 // +--------------------+ <-- ApIdtBase (8-byte boundary)
1585 // AP IDT All APs share one separate IDT. So AP can get address of CPU_MP_DATA from IDT Base.
1586 // +--------------------+ <-- CpuMpData
1588 // +--------------------+ <-- CpuMpData->CpuData
1590 // +--------------------+ <-- CpuMpData->CpuInfoInHob
1591 // CPU_INFO_IN_HOB (N)
1592 // +--------------------+
1594 MonitorBuffer
= (UINT8
*) (Buffer
+ ApStackSize
* MaxLogicalProcessorNumber
);
1595 BackupBufferAddr
= (UINTN
) MonitorBuffer
+ MonitorFilterSize
* MaxLogicalProcessorNumber
;
1596 ApIdtBase
= ALIGN_VALUE (BackupBufferAddr
+ ApResetVectorSize
, 8);
1597 CpuMpData
= (CPU_MP_DATA
*) (ApIdtBase
+ VolatileRegisters
.Idtr
.Limit
+ 1);
1598 CpuMpData
->Buffer
= Buffer
;
1599 CpuMpData
->CpuApStackSize
= ApStackSize
;
1600 CpuMpData
->BackupBuffer
= BackupBufferAddr
;
1601 CpuMpData
->BackupBufferSize
= ApResetVectorSize
;
1602 CpuMpData
->WakeupBuffer
= (UINTN
) -1;
1603 CpuMpData
->CpuCount
= 1;
1604 CpuMpData
->BspNumber
= 0;
1605 CpuMpData
->WaitEvent
= NULL
;
1606 CpuMpData
->SwitchBspFlag
= FALSE
;
1607 CpuMpData
->CpuData
= (CPU_AP_DATA
*) (CpuMpData
+ 1);
1608 CpuMpData
->CpuInfoInHob
= (UINT64
) (UINTN
) (CpuMpData
->CpuData
+ MaxLogicalProcessorNumber
);
1609 CpuMpData
->MicrocodePatchRegionSize
= PcdGet64 (PcdCpuMicrocodePatchRegionSize
);
1611 // If platform has more than one CPU, relocate microcode to memory to reduce
1612 // loading microcode time.
1614 MicrocodePatchInRam
= NULL
;
1615 if (MaxLogicalProcessorNumber
> 1) {
1616 MicrocodePatchInRam
= AllocatePages (
1618 (UINTN
)CpuMpData
->MicrocodePatchRegionSize
1622 if (MicrocodePatchInRam
== NULL
) {
1624 // there is only one processor, or no microcode patch is available, or
1625 // memory allocation failed
1627 CpuMpData
->MicrocodePatchAddress
= PcdGet64 (PcdCpuMicrocodePatchAddress
);
1630 // there are multiple processors, and a microcode patch is available, and
1631 // memory allocation succeeded
1634 MicrocodePatchInRam
,
1635 (VOID
*)(UINTN
)PcdGet64 (PcdCpuMicrocodePatchAddress
),
1636 (UINTN
)CpuMpData
->MicrocodePatchRegionSize
1638 CpuMpData
->MicrocodePatchAddress
= (UINTN
)MicrocodePatchInRam
;
1641 InitializeSpinLock(&CpuMpData
->MpLock
);
1644 // Make sure no memory usage outside of the allocated buffer.
1646 ASSERT ((CpuMpData
->CpuInfoInHob
+ sizeof (CPU_INFO_IN_HOB
) * MaxLogicalProcessorNumber
) ==
1647 Buffer
+ BufferSize
);
1650 // Duplicate BSP's IDT to APs.
1651 // All APs share one separate IDT. So AP can get the address of CpuMpData by using IDTR.BASE + IDTR.LIMIT + 1
1653 CopyMem ((VOID
*)ApIdtBase
, (VOID
*)VolatileRegisters
.Idtr
.Base
, VolatileRegisters
.Idtr
.Limit
+ 1);
1654 VolatileRegisters
.Idtr
.Base
= ApIdtBase
;
1656 // Don't pass BSP's TR to APs to avoid AP init failure.
1658 VolatileRegisters
.Tr
= 0;
1659 CopyMem (&CpuMpData
->CpuData
[0].VolatileRegisters
, &VolatileRegisters
, sizeof (VolatileRegisters
));
1661 // Set BSP basic information
1663 InitializeApData (CpuMpData
, 0, 0, CpuMpData
->Buffer
+ ApStackSize
);
1665 // Save assembly code information
1667 CopyMem (&CpuMpData
->AddressMap
, &AddressMap
, sizeof (MP_ASSEMBLY_ADDRESS_MAP
));
1669 // Finally set AP loop mode
1671 CpuMpData
->ApLoopMode
= ApLoopMode
;
1672 DEBUG ((DEBUG_INFO
, "AP Loop Mode is %d\n", CpuMpData
->ApLoopMode
));
1674 CpuMpData
->WakeUpByInitSipiSipi
= (CpuMpData
->ApLoopMode
== ApInHltLoop
);
1677 // Set up APs wakeup signal buffer
1679 for (Index
= 0; Index
< MaxLogicalProcessorNumber
; Index
++) {
1680 CpuMpData
->CpuData
[Index
].StartupApSignal
=
1681 (UINT32
*)(MonitorBuffer
+ MonitorFilterSize
* Index
);
1684 // Load Microcode on BSP
1686 MicrocodeDetect (CpuMpData
, TRUE
);
1688 // Store BSP's MTRR setting
1690 MtrrGetAllMtrrs (&CpuMpData
->MtrrTable
);
1692 // Enable the local APIC for Virtual Wire Mode.
1694 ProgramVirtualWireMode ();
1696 if (OldCpuMpData
== NULL
) {
1697 if (MaxLogicalProcessorNumber
> 1) {
1699 // Wakeup all APs and calculate the processor count in system
1701 CollectProcessorCount (CpuMpData
);
1705 // APs have been wakeup before, just get the CPU Information
1708 CpuMpData
->CpuCount
= OldCpuMpData
->CpuCount
;
1709 CpuMpData
->BspNumber
= OldCpuMpData
->BspNumber
;
1710 CpuMpData
->InitFlag
= ApInitReconfig
;
1711 CpuMpData
->CpuInfoInHob
= OldCpuMpData
->CpuInfoInHob
;
1712 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1713 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1714 InitializeSpinLock(&CpuMpData
->CpuData
[Index
].ApLock
);
1715 if (CpuInfoInHob
[Index
].InitialApicId
>= 255 || Index
> 254) {
1716 CpuMpData
->X2ApicEnable
= TRUE
;
1718 CpuMpData
->CpuData
[Index
].CpuHealthy
= (CpuInfoInHob
[Index
].Health
== 0)? TRUE
:FALSE
;
1719 CpuMpData
->CpuData
[Index
].ApFunction
= 0;
1720 CopyMem (&CpuMpData
->CpuData
[Index
].VolatileRegisters
, &VolatileRegisters
, sizeof (CPU_VOLATILE_REGISTERS
));
1722 if (MaxLogicalProcessorNumber
> 1) {
1724 // Wakeup APs to do some AP initialize sync
1726 WakeUpAP (CpuMpData
, TRUE
, 0, ApInitializeSync
, CpuMpData
, TRUE
);
1728 // Wait for all APs finished initialization
1730 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
1733 CpuMpData
->InitFlag
= ApInitDone
;
1734 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1735 SetApState (&CpuMpData
->CpuData
[Index
], CpuStateIdle
);
1741 // Initialize global data for MP support
1743 InitMpGlobalData (CpuMpData
);
1749 Gets detailed MP-related information on the requested processor at the
1750 instant this call is made. This service may only be called from the BSP.
1752 @param[in] ProcessorNumber The handle number of processor.
1753 @param[out] ProcessorInfoBuffer A pointer to the buffer where information for
1754 the requested processor is deposited.
1755 @param[out] HealthData Return processor health data.
1757 @retval EFI_SUCCESS Processor information was returned.
1758 @retval EFI_DEVICE_ERROR The calling processor is an AP.
1759 @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
1760 @retval EFI_NOT_FOUND The processor with the handle specified by
1761 ProcessorNumber does not exist in the platform.
1762 @retval EFI_NOT_READY MP Initialize Library is not initialized.
1767 MpInitLibGetProcessorInfo (
1768 IN UINTN ProcessorNumber
,
1769 OUT EFI_PROCESSOR_INFORMATION
*ProcessorInfoBuffer
,
1770 OUT EFI_HEALTH_FLAGS
*HealthData OPTIONAL
1773 CPU_MP_DATA
*CpuMpData
;
1775 CPU_INFO_IN_HOB
*CpuInfoInHob
;
1777 CpuMpData
= GetCpuMpData ();
1778 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1781 // Check whether caller processor is BSP
1783 MpInitLibWhoAmI (&CallerNumber
);
1784 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1785 return EFI_DEVICE_ERROR
;
1788 if (ProcessorInfoBuffer
== NULL
) {
1789 return EFI_INVALID_PARAMETER
;
1792 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
1793 return EFI_NOT_FOUND
;
1796 ProcessorInfoBuffer
->ProcessorId
= (UINT64
) CpuInfoInHob
[ProcessorNumber
].ApicId
;
1797 ProcessorInfoBuffer
->StatusFlag
= 0;
1798 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
1799 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_AS_BSP_BIT
;
1801 if (CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
) {
1802 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_HEALTH_STATUS_BIT
;
1804 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateDisabled
) {
1805 ProcessorInfoBuffer
->StatusFlag
&= ~PROCESSOR_ENABLED_BIT
;
1807 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_ENABLED_BIT
;
1811 // Get processor location information
1813 GetProcessorLocationByApicId (
1814 CpuInfoInHob
[ProcessorNumber
].ApicId
,
1815 &ProcessorInfoBuffer
->Location
.Package
,
1816 &ProcessorInfoBuffer
->Location
.Core
,
1817 &ProcessorInfoBuffer
->Location
.Thread
1820 if (HealthData
!= NULL
) {
1821 HealthData
->Uint32
= CpuInfoInHob
[ProcessorNumber
].Health
;
1828 Worker function to switch the requested AP to be the BSP from that point onward.
1830 @param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
1831 @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
1832 enabled AP. Otherwise, it will be disabled.
1834 @retval EFI_SUCCESS BSP successfully switched.
1835 @retval others Failed to switch BSP.
1840 IN UINTN ProcessorNumber
,
1841 IN BOOLEAN EnableOldBSP
1844 CPU_MP_DATA
*CpuMpData
;
1847 MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr
;
1848 BOOLEAN OldInterruptState
;
1849 BOOLEAN OldTimerInterruptState
;
1852 // Save and Disable Local APIC timer interrupt
1854 OldTimerInterruptState
= GetApicTimerInterruptState ();
1855 DisableApicTimerInterrupt ();
1857 // Before send both BSP and AP to a procedure to exchange their roles,
1858 // interrupt must be disabled. This is because during the exchange role
1859 // process, 2 CPU may use 1 stack. If interrupt happens, the stack will
1860 // be corrupted, since interrupt return address will be pushed to stack
1863 OldInterruptState
= SaveAndDisableInterrupts ();
1866 // Mask LINT0 & LINT1 for the old BSP
1868 DisableLvtInterrupts ();
1870 CpuMpData
= GetCpuMpData ();
1873 // Check whether caller processor is BSP
1875 MpInitLibWhoAmI (&CallerNumber
);
1876 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1877 return EFI_DEVICE_ERROR
;
1880 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
1881 return EFI_NOT_FOUND
;
1885 // Check whether specified AP is disabled
1887 State
= GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]);
1888 if (State
== CpuStateDisabled
) {
1889 return EFI_INVALID_PARAMETER
;
1893 // Check whether ProcessorNumber specifies the current BSP
1895 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
1896 return EFI_INVALID_PARAMETER
;
1900 // Check whether specified AP is busy
1902 if (State
== CpuStateBusy
) {
1903 return EFI_NOT_READY
;
1906 CpuMpData
->BSPInfo
.State
= CPU_SWITCH_STATE_IDLE
;
1907 CpuMpData
->APInfo
.State
= CPU_SWITCH_STATE_IDLE
;
1908 CpuMpData
->SwitchBspFlag
= TRUE
;
1909 CpuMpData
->NewBspNumber
= ProcessorNumber
;
1912 // Clear the BSP bit of MSR_IA32_APIC_BASE
1914 ApicBaseMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_APIC_BASE
);
1915 ApicBaseMsr
.Bits
.BSP
= 0;
1916 AsmWriteMsr64 (MSR_IA32_APIC_BASE
, ApicBaseMsr
.Uint64
);
1919 // Need to wakeUp AP (future BSP).
1921 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, FutureBSPProc
, CpuMpData
, TRUE
);
1923 AsmExchangeRole (&CpuMpData
->BSPInfo
, &CpuMpData
->APInfo
);
1926 // Set the BSP bit of MSR_IA32_APIC_BASE on new BSP
1928 ApicBaseMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_APIC_BASE
);
1929 ApicBaseMsr
.Bits
.BSP
= 1;
1930 AsmWriteMsr64 (MSR_IA32_APIC_BASE
, ApicBaseMsr
.Uint64
);
1931 ProgramVirtualWireMode ();
1934 // Wait for old BSP finished AP task
1936 while (GetApState (&CpuMpData
->CpuData
[CallerNumber
]) != CpuStateFinished
) {
1940 CpuMpData
->SwitchBspFlag
= FALSE
;
1942 // Set old BSP enable state
1944 if (!EnableOldBSP
) {
1945 SetApState (&CpuMpData
->CpuData
[CallerNumber
], CpuStateDisabled
);
1947 SetApState (&CpuMpData
->CpuData
[CallerNumber
], CpuStateIdle
);
1950 // Save new BSP number
1952 CpuMpData
->BspNumber
= (UINT32
) ProcessorNumber
;
1955 // Restore interrupt state.
1957 SetInterruptState (OldInterruptState
);
1959 if (OldTimerInterruptState
) {
1960 EnableApicTimerInterrupt ();
1967 Worker function to let the caller enable or disable an AP from this point onward.
1968 This service may only be called from the BSP.
1970 @param[in] ProcessorNumber The handle number of AP.
1971 @param[in] EnableAP Specifies the new state for the processor for
1972 enabled, FALSE for disabled.
1973 @param[in] HealthFlag If not NULL, a pointer to a value that specifies
1974 the new health status of the AP.
1976 @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
1977 @retval others Failed to Enable/Disable AP.
1981 EnableDisableApWorker (
1982 IN UINTN ProcessorNumber
,
1983 IN BOOLEAN EnableAP
,
1984 IN UINT32
*HealthFlag OPTIONAL
1987 CPU_MP_DATA
*CpuMpData
;
1990 CpuMpData
= GetCpuMpData ();
1993 // Check whether caller processor is BSP
1995 MpInitLibWhoAmI (&CallerNumber
);
1996 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1997 return EFI_DEVICE_ERROR
;
2000 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
2001 return EFI_INVALID_PARAMETER
;
2004 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
2005 return EFI_NOT_FOUND
;
2009 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateDisabled
);
2011 ResetProcessorToIdleState (ProcessorNumber
);
2014 if (HealthFlag
!= NULL
) {
2015 CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
=
2016 (BOOLEAN
) ((*HealthFlag
& PROCESSOR_HEALTH_STATUS_BIT
) != 0);
2023 This return the handle number for the calling processor. This service may be
2024 called from the BSP and APs.
2026 @param[out] ProcessorNumber Pointer to the handle number of AP.
2027 The range is from 0 to the total number of
2028 logical processors minus 1. The total number of
2029 logical processors can be retrieved by
2030 MpInitLibGetNumberOfProcessors().
2032 @retval EFI_SUCCESS The current processor handle number was returned
2034 @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
2035 @retval EFI_NOT_READY MP Initialize Library is not initialized.
2041 OUT UINTN
*ProcessorNumber
2044 CPU_MP_DATA
*CpuMpData
;
2046 if (ProcessorNumber
== NULL
) {
2047 return EFI_INVALID_PARAMETER
;
2050 CpuMpData
= GetCpuMpData ();
2052 return GetProcessorNumber (CpuMpData
, ProcessorNumber
);
2056 Retrieves the number of logical processor in the platform and the number of
2057 those logical processors that are enabled on this boot. This service may only
2058 be called from the BSP.
2060 @param[out] NumberOfProcessors Pointer to the total number of logical
2061 processors in the system, including the BSP
2063 @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
2064 processors that exist in system, including
2067 @retval EFI_SUCCESS The number of logical processors and enabled
2068 logical processors was retrieved.
2069 @retval EFI_DEVICE_ERROR The calling processor is an AP.
2070 @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL and NumberOfEnabledProcessors
2072 @retval EFI_NOT_READY MP Initialize Library is not initialized.
2077 MpInitLibGetNumberOfProcessors (
2078 OUT UINTN
*NumberOfProcessors
, OPTIONAL
2079 OUT UINTN
*NumberOfEnabledProcessors OPTIONAL
2082 CPU_MP_DATA
*CpuMpData
;
2084 UINTN ProcessorNumber
;
2085 UINTN EnabledProcessorNumber
;
2088 CpuMpData
= GetCpuMpData ();
2090 if ((NumberOfProcessors
== NULL
) && (NumberOfEnabledProcessors
== NULL
)) {
2091 return EFI_INVALID_PARAMETER
;
2095 // Check whether caller processor is BSP
2097 MpInitLibWhoAmI (&CallerNumber
);
2098 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2099 return EFI_DEVICE_ERROR
;
2102 ProcessorNumber
= CpuMpData
->CpuCount
;
2103 EnabledProcessorNumber
= 0;
2104 for (Index
= 0; Index
< ProcessorNumber
; Index
++) {
2105 if (GetApState (&CpuMpData
->CpuData
[Index
]) != CpuStateDisabled
) {
2106 EnabledProcessorNumber
++;
2110 if (NumberOfProcessors
!= NULL
) {
2111 *NumberOfProcessors
= ProcessorNumber
;
2113 if (NumberOfEnabledProcessors
!= NULL
) {
2114 *NumberOfEnabledProcessors
= EnabledProcessorNumber
;
2122 Worker function to execute a caller provided function on all enabled APs.
2124 @param[in] Procedure A pointer to the function to be run on
2125 enabled APs of the system.
2126 @param[in] SingleThread If TRUE, then all the enabled APs execute
2127 the function specified by Procedure one by
2128 one, in ascending order of processor handle
2129 number. If FALSE, then all the enabled APs
2130 execute the function specified by Procedure
2132 @param[in] WaitEvent The event created by the caller with CreateEvent()
2134 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
2135 APs to return from Procedure, either for
2136 blocking or non-blocking mode.
2137 @param[in] ProcedureArgument The parameter passed into Procedure for
2139 @param[out] FailedCpuList If all APs finish successfully, then its
2140 content is set to NULL. If not all APs
2141 finish before timeout expires, then its
2142 content is set to address of the buffer
2143 holding handle numbers of the failed APs.
2145 @retval EFI_SUCCESS In blocking mode, all APs have finished before
2146 the timeout expired.
2147 @retval EFI_SUCCESS In non-blocking mode, function has been dispatched
2149 @retval others Failed to Startup all APs.
2153 StartupAllAPsWorker (
2154 IN EFI_AP_PROCEDURE Procedure
,
2155 IN BOOLEAN SingleThread
,
2156 IN EFI_EVENT WaitEvent OPTIONAL
,
2157 IN UINTN TimeoutInMicroseconds
,
2158 IN VOID
*ProcedureArgument OPTIONAL
,
2159 OUT UINTN
**FailedCpuList OPTIONAL
2163 CPU_MP_DATA
*CpuMpData
;
2164 UINTN ProcessorCount
;
2165 UINTN ProcessorNumber
;
2167 CPU_AP_DATA
*CpuData
;
2168 BOOLEAN HasEnabledAp
;
2171 CpuMpData
= GetCpuMpData ();
2173 if (FailedCpuList
!= NULL
) {
2174 *FailedCpuList
= NULL
;
2177 if (CpuMpData
->CpuCount
== 1) {
2178 return EFI_NOT_STARTED
;
2181 if (Procedure
== NULL
) {
2182 return EFI_INVALID_PARAMETER
;
2186 // Check whether caller processor is BSP
2188 MpInitLibWhoAmI (&CallerNumber
);
2189 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2190 return EFI_DEVICE_ERROR
;
2196 CheckAndUpdateApsStatus ();
2198 ProcessorCount
= CpuMpData
->CpuCount
;
2199 HasEnabledAp
= FALSE
;
2201 // Check whether all enabled APs are idle.
2202 // If any enabled AP is not idle, return EFI_NOT_READY.
2204 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2205 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2206 if (ProcessorNumber
!= CpuMpData
->BspNumber
) {
2207 ApState
= GetApState (CpuData
);
2208 if (ApState
!= CpuStateDisabled
) {
2209 HasEnabledAp
= TRUE
;
2210 if (ApState
!= CpuStateIdle
) {
2212 // If any enabled APs are busy, return EFI_NOT_READY.
2214 return EFI_NOT_READY
;
2220 if (!HasEnabledAp
) {
2222 // If no enabled AP exists, return EFI_NOT_STARTED.
2224 return EFI_NOT_STARTED
;
2227 CpuMpData
->RunningCount
= 0;
2228 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2229 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2230 CpuData
->Waiting
= FALSE
;
2231 if (ProcessorNumber
!= CpuMpData
->BspNumber
) {
2232 if (CpuData
->State
== CpuStateIdle
) {
2234 // Mark this processor as responsible for current calling.
2236 CpuData
->Waiting
= TRUE
;
2237 CpuMpData
->RunningCount
++;
2242 CpuMpData
->Procedure
= Procedure
;
2243 CpuMpData
->ProcArguments
= ProcedureArgument
;
2244 CpuMpData
->SingleThread
= SingleThread
;
2245 CpuMpData
->FinishedCount
= 0;
2246 CpuMpData
->FailedCpuList
= FailedCpuList
;
2247 CpuMpData
->ExpectedTime
= CalculateTimeout (
2248 TimeoutInMicroseconds
,
2249 &CpuMpData
->CurrentTime
2251 CpuMpData
->TotalTime
= 0;
2252 CpuMpData
->WaitEvent
= WaitEvent
;
2254 if (!SingleThread
) {
2255 WakeUpAP (CpuMpData
, TRUE
, 0, Procedure
, ProcedureArgument
, FALSE
);
2257 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2258 if (ProcessorNumber
== CallerNumber
) {
2261 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
2262 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, Procedure
, ProcedureArgument
, TRUE
);
2268 Status
= EFI_SUCCESS
;
2269 if (WaitEvent
== NULL
) {
2271 Status
= CheckAllAPs ();
2272 } while (Status
== EFI_NOT_READY
);
2279 Worker function to let the caller get one enabled AP to execute a caller-provided
2282 @param[in] Procedure A pointer to the function to be run on
2283 enabled APs of the system.
2284 @param[in] ProcessorNumber The handle number of the AP.
2285 @param[in] WaitEvent The event created by the caller with CreateEvent()
2287 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
2288 APs to return from Procedure, either for
2289 blocking or non-blocking mode.
2290 @param[in] ProcedureArgument The parameter passed into Procedure for
2292 @param[out] Finished If AP returns from Procedure before the
2293 timeout expires, its content is set to TRUE.
2294 Otherwise, the value is set to FALSE.
2296 @retval EFI_SUCCESS In blocking mode, specified AP finished before
2297 the timeout expires.
2298 @retval others Failed to Startup AP.
2302 StartupThisAPWorker (
2303 IN EFI_AP_PROCEDURE Procedure
,
2304 IN UINTN ProcessorNumber
,
2305 IN EFI_EVENT WaitEvent OPTIONAL
,
2306 IN UINTN TimeoutInMicroseconds
,
2307 IN VOID
*ProcedureArgument OPTIONAL
,
2308 OUT BOOLEAN
*Finished OPTIONAL
2312 CPU_MP_DATA
*CpuMpData
;
2313 CPU_AP_DATA
*CpuData
;
2316 CpuMpData
= GetCpuMpData ();
2318 if (Finished
!= NULL
) {
2323 // Check whether caller processor is BSP
2325 MpInitLibWhoAmI (&CallerNumber
);
2326 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2327 return EFI_DEVICE_ERROR
;
2331 // Check whether processor with the handle specified by ProcessorNumber exists
2333 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
2334 return EFI_NOT_FOUND
;
2338 // Check whether specified processor is BSP
2340 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
2341 return EFI_INVALID_PARAMETER
;
2345 // Check parameter Procedure
2347 if (Procedure
== NULL
) {
2348 return EFI_INVALID_PARAMETER
;
2354 CheckAndUpdateApsStatus ();
2357 // Check whether specified AP is disabled
2359 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateDisabled
) {
2360 return EFI_INVALID_PARAMETER
;
2364 // If WaitEvent is not NULL, execute in non-blocking mode.
2365 // BSP saves data for CheckAPsStatus(), and returns EFI_SUCCESS.
2366 // CheckAPsStatus() will check completion and timeout periodically.
2368 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2369 CpuData
->WaitEvent
= WaitEvent
;
2370 CpuData
->Finished
= Finished
;
2371 CpuData
->ExpectedTime
= CalculateTimeout (TimeoutInMicroseconds
, &CpuData
->CurrentTime
);
2372 CpuData
->TotalTime
= 0;
2374 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, Procedure
, ProcedureArgument
, TRUE
);
2377 // If WaitEvent is NULL, execute in blocking mode.
2378 // BSP checks AP's state until it finishes or TimeoutInMicrosecsond expires.
2380 Status
= EFI_SUCCESS
;
2381 if (WaitEvent
== NULL
) {
2383 Status
= CheckThisAP (ProcessorNumber
);
2384 } while (Status
== EFI_NOT_READY
);
2391 Get pointer to CPU MP Data structure from GUIDed HOB.
2393 @return The pointer to CPU MP Data structure.
2396 GetCpuMpDataFromGuidedHob (
2400 EFI_HOB_GUID_TYPE
*GuidHob
;
2402 CPU_MP_DATA
*CpuMpData
;
2405 GuidHob
= GetFirstGuidHob (&mCpuInitMpLibHobGuid
);
2406 if (GuidHob
!= NULL
) {
2407 DataInHob
= GET_GUID_HOB_DATA (GuidHob
);
2408 CpuMpData
= (CPU_MP_DATA
*) (*(UINTN
*) DataInHob
);