2 CPU MP Initialize Library common functions.
4 Copyright (c) 2016 - 2018, 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.
17 EFI_GUID mCpuInitMpLibHobGuid
= CPU_INIT_MP_LIB_HOB_GUID
;
20 The function will check if BSP Execute Disable is enabled.
22 DxeIpl may have enabled Execute Disable for BSP, APs need to
23 get the status and sync up the settings.
24 If BSP's CR0.Paging is not set, BSP execute Disble feature is
27 @retval TRUE BSP Execute Disable is enabled.
28 @retval FALSE BSP Execute Disable is not enabled.
31 IsBspExecuteDisableEnabled (
36 CPUID_EXTENDED_CPU_SIG_EDX Edx
;
37 MSR_IA32_EFER_REGISTER EferMsr
;
42 Cr0
.UintN
= AsmReadCr0 ();
43 if (Cr0
.Bits
.PG
!= 0) {
45 // If CR0 Paging bit is set
47 AsmCpuid (CPUID_EXTENDED_FUNCTION
, &Eax
, NULL
, NULL
, NULL
);
48 if (Eax
>= CPUID_EXTENDED_CPU_SIG
) {
49 AsmCpuid (CPUID_EXTENDED_CPU_SIG
, NULL
, NULL
, NULL
, &Edx
.Uint32
);
52 // Bit 20: Execute Disable Bit available.
54 if (Edx
.Bits
.NX
!= 0) {
55 EferMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_EFER
);
58 // Bit 11: Execute Disable Bit enable.
60 if (EferMsr
.Bits
.NXE
!= 0) {
71 Worker function for SwitchBSP().
73 Worker function for SwitchBSP(), assigned to the AP which is intended
76 @param[in] Buffer Pointer to CPU MP Data
84 CPU_MP_DATA
*DataInHob
;
86 DataInHob
= (CPU_MP_DATA
*) Buffer
;
87 AsmExchangeRole (&DataInHob
->APInfo
, &DataInHob
->BSPInfo
);
91 Get the Application Processors state.
93 @param[in] CpuData The pointer to CPU_AP_DATA of specified AP
99 IN CPU_AP_DATA
*CpuData
102 return CpuData
->State
;
106 Set the Application Processors state.
108 @param[in] CpuData The pointer to CPU_AP_DATA of specified AP
109 @param[in] State The AP status
113 IN CPU_AP_DATA
*CpuData
,
117 AcquireSpinLock (&CpuData
->ApLock
);
118 CpuData
->State
= State
;
119 ReleaseSpinLock (&CpuData
->ApLock
);
123 Save BSP's local APIC timer setting.
125 @param[in] CpuMpData Pointer to CPU MP Data
128 SaveLocalApicTimerSetting (
129 IN CPU_MP_DATA
*CpuMpData
133 // Record the current local APIC timer setting of BSP
136 &CpuMpData
->DivideValue
,
137 &CpuMpData
->PeriodicMode
,
140 CpuMpData
->CurrentTimerCount
= GetApicTimerCurrentCount ();
141 CpuMpData
->TimerInterruptState
= GetApicTimerInterruptState ();
145 Sync local APIC timer setting from BSP to AP.
147 @param[in] CpuMpData Pointer to CPU MP Data
150 SyncLocalApicTimerSetting (
151 IN CPU_MP_DATA
*CpuMpData
155 // Sync local APIC timer setting from BSP to AP
157 InitializeApicTimer (
158 CpuMpData
->DivideValue
,
159 CpuMpData
->CurrentTimerCount
,
160 CpuMpData
->PeriodicMode
,
164 // Disable AP's local APIC timer interrupt
166 DisableApicTimerInterrupt ();
170 Save the volatile registers required to be restored following INIT IPI.
172 @param[out] VolatileRegisters Returns buffer saved the volatile resisters
175 SaveVolatileRegisters (
176 OUT CPU_VOLATILE_REGISTERS
*VolatileRegisters
179 CPUID_VERSION_INFO_EDX VersionInfoEdx
;
181 VolatileRegisters
->Cr0
= AsmReadCr0 ();
182 VolatileRegisters
->Cr3
= AsmReadCr3 ();
183 VolatileRegisters
->Cr4
= AsmReadCr4 ();
185 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &VersionInfoEdx
.Uint32
);
186 if (VersionInfoEdx
.Bits
.DE
!= 0) {
188 // If processor supports Debugging Extensions feature
189 // by CPUID.[EAX=01H]:EDX.BIT2
191 VolatileRegisters
->Dr0
= AsmReadDr0 ();
192 VolatileRegisters
->Dr1
= AsmReadDr1 ();
193 VolatileRegisters
->Dr2
= AsmReadDr2 ();
194 VolatileRegisters
->Dr3
= AsmReadDr3 ();
195 VolatileRegisters
->Dr6
= AsmReadDr6 ();
196 VolatileRegisters
->Dr7
= AsmReadDr7 ();
199 AsmReadGdtr (&VolatileRegisters
->Gdtr
);
200 AsmReadIdtr (&VolatileRegisters
->Idtr
);
201 VolatileRegisters
->Tr
= AsmReadTr ();
205 Restore the volatile registers following INIT IPI.
207 @param[in] VolatileRegisters Pointer to volatile resisters
208 @param[in] IsRestoreDr TRUE: Restore DRx if supported
209 FALSE: Do not restore DRx
212 RestoreVolatileRegisters (
213 IN CPU_VOLATILE_REGISTERS
*VolatileRegisters
,
214 IN BOOLEAN IsRestoreDr
217 CPUID_VERSION_INFO_EDX VersionInfoEdx
;
218 IA32_TSS_DESCRIPTOR
*Tss
;
220 AsmWriteCr0 (VolatileRegisters
->Cr0
);
221 AsmWriteCr3 (VolatileRegisters
->Cr3
);
222 AsmWriteCr4 (VolatileRegisters
->Cr4
);
225 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, NULL
, &VersionInfoEdx
.Uint32
);
226 if (VersionInfoEdx
.Bits
.DE
!= 0) {
228 // If processor supports Debugging Extensions feature
229 // by CPUID.[EAX=01H]:EDX.BIT2
231 AsmWriteDr0 (VolatileRegisters
->Dr0
);
232 AsmWriteDr1 (VolatileRegisters
->Dr1
);
233 AsmWriteDr2 (VolatileRegisters
->Dr2
);
234 AsmWriteDr3 (VolatileRegisters
->Dr3
);
235 AsmWriteDr6 (VolatileRegisters
->Dr6
);
236 AsmWriteDr7 (VolatileRegisters
->Dr7
);
240 AsmWriteGdtr (&VolatileRegisters
->Gdtr
);
241 AsmWriteIdtr (&VolatileRegisters
->Idtr
);
242 if (VolatileRegisters
->Tr
!= 0 &&
243 VolatileRegisters
->Tr
< VolatileRegisters
->Gdtr
.Limit
) {
244 Tss
= (IA32_TSS_DESCRIPTOR
*)(VolatileRegisters
->Gdtr
.Base
+
245 VolatileRegisters
->Tr
);
246 if (Tss
->Bits
.P
== 1) {
247 Tss
->Bits
.Type
&= 0xD; // 1101 - Clear busy bit just in case
248 AsmWriteTr (VolatileRegisters
->Tr
);
254 Detect whether Mwait-monitor feature is supported.
256 @retval TRUE Mwait-monitor feature is supported.
257 @retval FALSE Mwait-monitor feature is not supported.
264 CPUID_VERSION_INFO_ECX VersionInfoEcx
;
266 AsmCpuid (CPUID_VERSION_INFO
, NULL
, NULL
, &VersionInfoEcx
.Uint32
, NULL
);
267 return (VersionInfoEcx
.Bits
.MONITOR
== 1) ? TRUE
: FALSE
;
273 @param[out] MonitorFilterSize Returns the largest monitor-line size in bytes.
275 @return The AP loop mode.
279 OUT UINT32
*MonitorFilterSize
283 CPUID_MONITOR_MWAIT_EBX MonitorMwaitEbx
;
285 ASSERT (MonitorFilterSize
!= NULL
);
287 ApLoopMode
= PcdGet8 (PcdCpuApLoopMode
);
288 ASSERT (ApLoopMode
>= ApInHltLoop
&& ApLoopMode
<= ApInRunLoop
);
289 if (ApLoopMode
== ApInMwaitLoop
) {
290 if (!IsMwaitSupport ()) {
292 // If processor does not support MONITOR/MWAIT feature,
293 // force AP in Hlt-loop mode
295 ApLoopMode
= ApInHltLoop
;
299 if (ApLoopMode
!= ApInMwaitLoop
) {
300 *MonitorFilterSize
= sizeof (UINT32
);
303 // CPUID.[EAX=05H]:EBX.BIT0-15: Largest monitor-line size in bytes
304 // CPUID.[EAX=05H].EDX: C-states supported using MWAIT
306 AsmCpuid (CPUID_MONITOR_MWAIT
, NULL
, &MonitorMwaitEbx
.Uint32
, NULL
, NULL
);
307 *MonitorFilterSize
= MonitorMwaitEbx
.Bits
.LargestMonitorLineSize
;
314 Sort the APIC ID of all processors.
316 This function sorts the APIC ID of all processors so that processor number is
317 assigned in the ascending order of APIC ID which eases MP debugging.
319 @param[in] CpuMpData Pointer to PEI CPU MP Data
323 IN CPU_MP_DATA
*CpuMpData
330 CPU_INFO_IN_HOB CpuInfo
;
332 CPU_INFO_IN_HOB
*CpuInfoInHob
;
333 volatile UINT32
*StartupApSignal
;
335 ApCount
= CpuMpData
->CpuCount
- 1;
336 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
338 for (Index1
= 0; Index1
< ApCount
; Index1
++) {
341 // Sort key is the hardware default APIC ID
343 ApicId
= CpuInfoInHob
[Index1
].ApicId
;
344 for (Index2
= Index1
+ 1; Index2
<= ApCount
; Index2
++) {
345 if (ApicId
> CpuInfoInHob
[Index2
].ApicId
) {
347 ApicId
= CpuInfoInHob
[Index2
].ApicId
;
350 if (Index3
!= Index1
) {
351 CopyMem (&CpuInfo
, &CpuInfoInHob
[Index3
], sizeof (CPU_INFO_IN_HOB
));
353 &CpuInfoInHob
[Index3
],
354 &CpuInfoInHob
[Index1
],
355 sizeof (CPU_INFO_IN_HOB
)
357 CopyMem (&CpuInfoInHob
[Index1
], &CpuInfo
, sizeof (CPU_INFO_IN_HOB
));
360 // Also exchange the StartupApSignal.
362 StartupApSignal
= CpuMpData
->CpuData
[Index3
].StartupApSignal
;
363 CpuMpData
->CpuData
[Index3
].StartupApSignal
=
364 CpuMpData
->CpuData
[Index1
].StartupApSignal
;
365 CpuMpData
->CpuData
[Index1
].StartupApSignal
= StartupApSignal
;
370 // Get the processor number for the BSP
372 ApicId
= GetInitialApicId ();
373 for (Index1
= 0; Index1
< CpuMpData
->CpuCount
; Index1
++) {
374 if (CpuInfoInHob
[Index1
].ApicId
== ApicId
) {
375 CpuMpData
->BspNumber
= (UINT32
) Index1
;
383 Enable x2APIC mode on APs.
385 @param[in, out] Buffer Pointer to private data buffer.
393 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
399 @param[in, out] Buffer Pointer to private data buffer.
407 CPU_MP_DATA
*CpuMpData
;
409 CpuMpData
= (CPU_MP_DATA
*) Buffer
;
411 // Load microcode on AP
413 MicrocodeDetect (CpuMpData
);
415 // Sync BSP's MTRR table to AP
417 MtrrSetAllMtrrs (&CpuMpData
->MtrrTable
);
421 Find the current Processor number by APIC ID.
423 @param[in] CpuMpData Pointer to PEI CPU MP Data
424 @param[out] ProcessorNumber Return the pocessor number found
426 @retval EFI_SUCCESS ProcessorNumber is found and returned.
427 @retval EFI_NOT_FOUND ProcessorNumber is not found.
431 IN CPU_MP_DATA
*CpuMpData
,
432 OUT UINTN
*ProcessorNumber
435 UINTN TotalProcessorNumber
;
437 CPU_INFO_IN_HOB
*CpuInfoInHob
;
439 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
441 TotalProcessorNumber
= CpuMpData
->CpuCount
;
442 for (Index
= 0; Index
< TotalProcessorNumber
; Index
++) {
443 if (CpuInfoInHob
[Index
].ApicId
== GetApicId ()) {
444 *ProcessorNumber
= Index
;
448 return EFI_NOT_FOUND
;
452 This function will get CPU count in the system.
454 @param[in] CpuMpData Pointer to PEI CPU MP Data
456 @return CPU count detected
459 CollectProcessorCount (
460 IN CPU_MP_DATA
*CpuMpData
466 // Send 1st broadcast IPI to APs to wakeup APs
468 CpuMpData
->InitFlag
= ApInitConfig
;
469 CpuMpData
->X2ApicEnable
= FALSE
;
470 WakeUpAP (CpuMpData
, TRUE
, 0, NULL
, NULL
);
471 CpuMpData
->InitFlag
= ApInitDone
;
472 ASSERT (CpuMpData
->CpuCount
<= PcdGet32 (PcdCpuMaxLogicalProcessorNumber
));
474 // Wait for all APs finished the initialization
476 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
480 if (CpuMpData
->CpuCount
> 255) {
482 // If there are more than 255 processor found, force to enable X2APIC
484 CpuMpData
->X2ApicEnable
= TRUE
;
486 if (CpuMpData
->X2ApicEnable
) {
487 DEBUG ((DEBUG_INFO
, "Force x2APIC mode!\n"));
489 // Wakeup all APs to enable x2APIC mode
491 WakeUpAP (CpuMpData
, TRUE
, 0, ApFuncEnableX2Apic
, NULL
);
493 // Wait for all known APs finished
495 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
499 // Enable x2APIC on BSP
501 SetApicMode (LOCAL_APIC_MODE_X2APIC
);
503 // Set BSP/Aps state to IDLE
505 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
506 SetApState (&CpuMpData
->CpuData
[Index
], CpuStateIdle
);
509 DEBUG ((DEBUG_INFO
, "APIC MODE is %d\n", GetApicMode ()));
511 // Sort BSP/Aps by CPU APIC ID in ascending order
513 SortApicId (CpuMpData
);
515 DEBUG ((DEBUG_INFO
, "MpInitLib: Find %d processors in system.\n", CpuMpData
->CpuCount
));
517 return CpuMpData
->CpuCount
;
521 Initialize CPU AP Data when AP is wakeup at the first time.
523 @param[in, out] CpuMpData Pointer to PEI CPU MP Data
524 @param[in] ProcessorNumber The handle number of processor
525 @param[in] BistData Processor BIST data
526 @param[in] ApTopOfStack Top of AP stack
531 IN OUT CPU_MP_DATA
*CpuMpData
,
532 IN UINTN ProcessorNumber
,
534 IN UINT64 ApTopOfStack
537 CPU_INFO_IN_HOB
*CpuInfoInHob
;
539 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
540 CpuInfoInHob
[ProcessorNumber
].InitialApicId
= GetInitialApicId ();
541 CpuInfoInHob
[ProcessorNumber
].ApicId
= GetApicId ();
542 CpuInfoInHob
[ProcessorNumber
].Health
= BistData
;
543 CpuInfoInHob
[ProcessorNumber
].ApTopOfStack
= ApTopOfStack
;
545 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
546 CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
= (BistData
== 0) ? TRUE
: FALSE
;
547 if (CpuInfoInHob
[ProcessorNumber
].InitialApicId
>= 0xFF) {
549 // Set x2APIC mode if there are any logical processor reporting
550 // an Initial APIC ID of 255 or greater.
552 AcquireSpinLock(&CpuMpData
->MpLock
);
553 CpuMpData
->X2ApicEnable
= TRUE
;
554 ReleaseSpinLock(&CpuMpData
->MpLock
);
557 InitializeSpinLock(&CpuMpData
->CpuData
[ProcessorNumber
].ApLock
);
558 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateIdle
);
562 This function will be called from AP reset code if BSP uses WakeUpAP.
564 @param[in] ExchangeInfo Pointer to the MP exchange info buffer
565 @param[in] ApIndex Number of current executing AP
570 IN MP_CPU_EXCHANGE_INFO
*ExchangeInfo
,
574 CPU_MP_DATA
*CpuMpData
;
575 UINTN ProcessorNumber
;
576 EFI_AP_PROCEDURE Procedure
;
579 volatile UINT32
*ApStartupSignalBuffer
;
580 CPU_INFO_IN_HOB
*CpuInfoInHob
;
582 UINTN CurrentApicMode
;
585 // AP finished assembly code and begin to execute C code
587 CpuMpData
= ExchangeInfo
->CpuMpData
;
590 // AP's local APIC settings will be lost after received INIT IPI
591 // We need to re-initialize them at here
593 ProgramVirtualWireMode ();
595 // Mask the LINT0 and LINT1 so that AP doesn't enter the system timer interrupt handler.
597 DisableLvtInterrupts ();
598 SyncLocalApicTimerSetting (CpuMpData
);
600 CurrentApicMode
= GetApicMode ();
602 if (CpuMpData
->InitFlag
== ApInitConfig
) {
606 InterlockedIncrement ((UINT32
*) &CpuMpData
->CpuCount
);
607 ProcessorNumber
= ApIndex
;
609 // This is first time AP wakeup, get BIST information from AP stack
611 ApTopOfStack
= CpuMpData
->Buffer
+ (ProcessorNumber
+ 1) * CpuMpData
->CpuApStackSize
;
612 BistData
= *(UINT32
*) ((UINTN
) ApTopOfStack
- sizeof (UINTN
));
614 // Do some AP initialize sync
616 ApInitializeSync (CpuMpData
);
618 // Sync BSP's Control registers to APs
620 RestoreVolatileRegisters (&CpuMpData
->CpuData
[0].VolatileRegisters
, FALSE
);
621 InitializeApData (CpuMpData
, ProcessorNumber
, BistData
, ApTopOfStack
);
622 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
625 // Execute AP function if AP is ready
627 GetProcessorNumber (CpuMpData
, &ProcessorNumber
);
629 // Clear AP start-up signal when AP waken up
631 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
632 InterlockedCompareExchange32 (
633 (UINT32
*) ApStartupSignalBuffer
,
637 if (CpuMpData
->ApLoopMode
== ApInHltLoop
) {
639 // Restore AP's volatile registers saved
641 RestoreVolatileRegisters (&CpuMpData
->CpuData
[ProcessorNumber
].VolatileRegisters
, TRUE
);
644 // The CPU driver might not flush TLB for APs on spot after updating
645 // page attributes. AP in mwait loop mode needs to take care of it when
651 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateReady
) {
652 Procedure
= (EFI_AP_PROCEDURE
)CpuMpData
->CpuData
[ProcessorNumber
].ApFunction
;
653 Parameter
= (VOID
*) CpuMpData
->CpuData
[ProcessorNumber
].ApFunctionArgument
;
654 if (Procedure
!= NULL
) {
655 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateBusy
);
657 // Enable source debugging on AP function
661 // Invoke AP function here
663 Procedure (Parameter
);
664 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
665 if (CpuMpData
->SwitchBspFlag
) {
667 // Re-get the processor number due to BSP/AP maybe exchange in AP function
669 GetProcessorNumber (CpuMpData
, &ProcessorNumber
);
670 CpuMpData
->CpuData
[ProcessorNumber
].ApFunction
= 0;
671 CpuMpData
->CpuData
[ProcessorNumber
].ApFunctionArgument
= 0;
672 ApStartupSignalBuffer
= CpuMpData
->CpuData
[ProcessorNumber
].StartupApSignal
;
673 CpuInfoInHob
[ProcessorNumber
].ApTopOfStack
= CpuInfoInHob
[CpuMpData
->NewBspNumber
].ApTopOfStack
;
675 if (CpuInfoInHob
[ProcessorNumber
].ApicId
!= GetApicId () ||
676 CpuInfoInHob
[ProcessorNumber
].InitialApicId
!= GetInitialApicId ()) {
677 if (CurrentApicMode
!= GetApicMode ()) {
679 // If APIC mode change happened during AP function execution,
680 // we do not support APIC ID value changed.
686 // Re-get the CPU APICID and Initial APICID if they are changed
688 CpuInfoInHob
[ProcessorNumber
].ApicId
= GetApicId ();
689 CpuInfoInHob
[ProcessorNumber
].InitialApicId
= GetInitialApicId ();
694 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateFinished
);
699 // AP finished executing C code
701 InterlockedIncrement ((UINT32
*) &CpuMpData
->FinishedCount
);
702 InterlockedDecrement ((UINT32
*) &CpuMpData
->MpCpuExchangeInfo
->NumApsExecuting
);
705 // Place AP is specified loop mode
707 if (CpuMpData
->ApLoopMode
== ApInHltLoop
) {
709 // Save AP volatile registers
711 SaveVolatileRegisters (&CpuMpData
->CpuData
[ProcessorNumber
].VolatileRegisters
);
713 // Place AP in HLT-loop
716 DisableInterrupts ();
722 DisableInterrupts ();
723 if (CpuMpData
->ApLoopMode
== ApInMwaitLoop
) {
725 // Place AP in MWAIT-loop
727 AsmMonitor ((UINTN
) ApStartupSignalBuffer
, 0, 0);
728 if (*ApStartupSignalBuffer
!= WAKEUP_AP_SIGNAL
) {
730 // Check AP start-up signal again.
731 // If AP start-up signal is not set, place AP into
732 // the specified C-state
734 AsmMwait (CpuMpData
->ApTargetCState
<< 4, 0);
736 } else if (CpuMpData
->ApLoopMode
== ApInRunLoop
) {
738 // Place AP in Run-loop
746 // If AP start-up signal is written, AP is waken up
747 // otherwise place AP in loop again
749 if (*ApStartupSignalBuffer
== WAKEUP_AP_SIGNAL
) {
757 Wait for AP wakeup and write AP start-up signal till AP is waken up.
759 @param[in] ApStartupSignalBuffer Pointer to AP wakeup signal
763 IN
volatile UINT32
*ApStartupSignalBuffer
767 // If AP is waken up, StartupApSignal should be cleared.
768 // Otherwise, write StartupApSignal again till AP waken up.
770 while (InterlockedCompareExchange32 (
771 (UINT32
*) ApStartupSignalBuffer
,
780 This function will fill the exchange info structure.
782 @param[in] CpuMpData Pointer to CPU MP Data
786 FillExchangeInfoData (
787 IN CPU_MP_DATA
*CpuMpData
790 volatile MP_CPU_EXCHANGE_INFO
*ExchangeInfo
;
792 IA32_SEGMENT_DESCRIPTOR
*Selector
;
794 ExchangeInfo
= CpuMpData
->MpCpuExchangeInfo
;
795 ExchangeInfo
->Lock
= 0;
796 ExchangeInfo
->StackStart
= CpuMpData
->Buffer
;
797 ExchangeInfo
->StackSize
= CpuMpData
->CpuApStackSize
;
798 ExchangeInfo
->BufferStart
= CpuMpData
->WakeupBuffer
;
799 ExchangeInfo
->ModeOffset
= CpuMpData
->AddressMap
.ModeEntryOffset
;
801 ExchangeInfo
->CodeSegment
= AsmReadCs ();
802 ExchangeInfo
->DataSegment
= AsmReadDs ();
804 ExchangeInfo
->Cr3
= AsmReadCr3 ();
806 ExchangeInfo
->CFunction
= (UINTN
) ApWakeupFunction
;
807 ExchangeInfo
->ApIndex
= 0;
808 ExchangeInfo
->NumApsExecuting
= 0;
809 ExchangeInfo
->InitFlag
= (UINTN
) CpuMpData
->InitFlag
;
810 ExchangeInfo
->CpuInfo
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
811 ExchangeInfo
->CpuMpData
= CpuMpData
;
813 ExchangeInfo
->EnableExecuteDisable
= IsBspExecuteDisableEnabled ();
815 ExchangeInfo
->InitializeFloatingPointUnitsAddress
= (UINTN
)InitializeFloatingPointUnits
;
818 // Get the BSP's data of GDT and IDT
820 AsmReadGdtr ((IA32_DESCRIPTOR
*) &ExchangeInfo
->GdtrProfile
);
821 AsmReadIdtr ((IA32_DESCRIPTOR
*) &ExchangeInfo
->IdtrProfile
);
824 // Find a 32-bit code segment
826 Selector
= (IA32_SEGMENT_DESCRIPTOR
*)ExchangeInfo
->GdtrProfile
.Base
;
827 Size
= ExchangeInfo
->GdtrProfile
.Limit
+ 1;
829 if (Selector
->Bits
.L
== 0 && Selector
->Bits
.Type
>= 8) {
830 ExchangeInfo
->ModeTransitionSegment
=
831 (UINT16
)((UINTN
)Selector
- ExchangeInfo
->GdtrProfile
.Base
);
835 Size
-= sizeof (IA32_SEGMENT_DESCRIPTOR
);
839 // Copy all 32-bit code and 64-bit code into memory with type of
840 // EfiBootServicesCode to avoid page fault if NX memory protection is enabled.
842 if (CpuMpData
->WakeupBufferHigh
!= 0) {
843 Size
= CpuMpData
->AddressMap
.RendezvousFunnelSize
-
844 CpuMpData
->AddressMap
.ModeTransitionOffset
;
846 (VOID
*)CpuMpData
->WakeupBufferHigh
,
847 CpuMpData
->AddressMap
.RendezvousFunnelAddress
+
848 CpuMpData
->AddressMap
.ModeTransitionOffset
,
852 ExchangeInfo
->ModeTransitionMemory
= (UINT32
)CpuMpData
->WakeupBufferHigh
;
854 ExchangeInfo
->ModeTransitionMemory
= (UINT32
)
855 (ExchangeInfo
->BufferStart
+ CpuMpData
->AddressMap
.ModeTransitionOffset
);
858 ExchangeInfo
->ModeHighMemory
= ExchangeInfo
->ModeTransitionMemory
+
859 (UINT32
)ExchangeInfo
->ModeOffset
-
860 (UINT32
)CpuMpData
->AddressMap
.ModeTransitionOffset
;
861 ExchangeInfo
->ModeHighSegment
= (UINT16
)ExchangeInfo
->CodeSegment
;
865 Helper function that waits until the finished AP count reaches the specified
866 limit, or the specified timeout elapses (whichever comes first).
868 @param[in] CpuMpData Pointer to CPU MP Data.
869 @param[in] FinishedApLimit The number of finished APs to wait for.
870 @param[in] TimeLimit The number of microseconds to wait for.
873 TimedWaitForApFinish (
874 IN CPU_MP_DATA
*CpuMpData
,
875 IN UINT32 FinishedApLimit
,
880 Get available system memory below 1MB by specified size.
882 @param[in] CpuMpData The pointer to CPU MP Data structure.
885 BackupAndPrepareWakeupBuffer(
886 IN CPU_MP_DATA
*CpuMpData
890 (VOID
*) CpuMpData
->BackupBuffer
,
891 (VOID
*) CpuMpData
->WakeupBuffer
,
892 CpuMpData
->BackupBufferSize
895 (VOID
*) CpuMpData
->WakeupBuffer
,
896 (VOID
*) CpuMpData
->AddressMap
.RendezvousFunnelAddress
,
897 CpuMpData
->AddressMap
.RendezvousFunnelSize
902 Restore wakeup buffer data.
904 @param[in] CpuMpData The pointer to CPU MP Data structure.
908 IN CPU_MP_DATA
*CpuMpData
912 (VOID
*) CpuMpData
->WakeupBuffer
,
913 (VOID
*) CpuMpData
->BackupBuffer
,
914 CpuMpData
->BackupBufferSize
919 Allocate reset vector buffer.
921 @param[in, out] CpuMpData The pointer to CPU MP Data structure.
924 AllocateResetVector (
925 IN OUT CPU_MP_DATA
*CpuMpData
928 UINTN ApResetVectorSize
;
930 if (CpuMpData
->WakeupBuffer
== (UINTN
) -1) {
931 ApResetVectorSize
= CpuMpData
->AddressMap
.RendezvousFunnelSize
+
932 sizeof (MP_CPU_EXCHANGE_INFO
);
934 CpuMpData
->WakeupBuffer
= GetWakeupBuffer (ApResetVectorSize
);
935 CpuMpData
->MpCpuExchangeInfo
= (MP_CPU_EXCHANGE_INFO
*) (UINTN
)
936 (CpuMpData
->WakeupBuffer
+ CpuMpData
->AddressMap
.RendezvousFunnelSize
);
937 CpuMpData
->WakeupBufferHigh
= GetModeTransitionBuffer (
938 CpuMpData
->AddressMap
.RendezvousFunnelSize
-
939 CpuMpData
->AddressMap
.ModeTransitionOffset
942 BackupAndPrepareWakeupBuffer (CpuMpData
);
946 Free AP reset vector buffer.
948 @param[in] CpuMpData The pointer to CPU MP Data structure.
952 IN CPU_MP_DATA
*CpuMpData
955 RestoreWakeupBuffer (CpuMpData
);
959 This function will be called by BSP to wakeup AP.
961 @param[in] CpuMpData Pointer to CPU MP Data
962 @param[in] Broadcast TRUE: Send broadcast IPI to all APs
963 FALSE: Send IPI to AP by ApicId
964 @param[in] ProcessorNumber The handle number of specified processor
965 @param[in] Procedure The function to be invoked by AP
966 @param[in] ProcedureArgument The argument to be passed into AP function
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
977 volatile MP_CPU_EXCHANGE_INFO
*ExchangeInfo
;
979 CPU_AP_DATA
*CpuData
;
980 BOOLEAN ResetVectorRequired
;
981 CPU_INFO_IN_HOB
*CpuInfoInHob
;
983 CpuMpData
->FinishedCount
= 0;
984 ResetVectorRequired
= FALSE
;
986 if (CpuMpData
->ApLoopMode
== ApInHltLoop
||
987 CpuMpData
->InitFlag
!= ApInitDone
) {
988 ResetVectorRequired
= TRUE
;
989 AllocateResetVector (CpuMpData
);
990 FillExchangeInfoData (CpuMpData
);
991 SaveLocalApicTimerSetting (CpuMpData
);
992 } else if (CpuMpData
->ApLoopMode
== ApInMwaitLoop
) {
994 // Get AP target C-state each time when waking up AP,
995 // for it maybe updated by platform again
997 CpuMpData
->ApTargetCState
= PcdGet8 (PcdCpuApTargetCstate
);
1000 ExchangeInfo
= CpuMpData
->MpCpuExchangeInfo
;
1003 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1004 if (Index
!= CpuMpData
->BspNumber
) {
1005 CpuData
= &CpuMpData
->CpuData
[Index
];
1006 CpuData
->ApFunction
= (UINTN
) Procedure
;
1007 CpuData
->ApFunctionArgument
= (UINTN
) ProcedureArgument
;
1008 SetApState (CpuData
, CpuStateReady
);
1009 if (CpuMpData
->InitFlag
!= ApInitConfig
) {
1010 *(UINT32
*) CpuData
->StartupApSignal
= WAKEUP_AP_SIGNAL
;
1014 if (ResetVectorRequired
) {
1018 SendInitSipiSipiAllExcludingSelf ((UINT32
) ExchangeInfo
->BufferStart
);
1020 if (CpuMpData
->InitFlag
== ApInitConfig
) {
1022 // Here support two methods to collect AP count through adjust
1023 // PcdCpuApInitTimeOutInMicroSeconds values.
1025 // one way is set a value to just let the first AP to start the
1026 // initialization, then through the later while loop to wait all Aps
1027 // finsh the initialization.
1028 // The other way is set a value to let all APs finished the initialzation.
1029 // In this case, the later while loop is useless.
1031 TimedWaitForApFinish (
1033 PcdGet32 (PcdCpuMaxLogicalProcessorNumber
) - 1,
1034 PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds
)
1037 while (CpuMpData
->MpCpuExchangeInfo
->NumApsExecuting
!= 0) {
1042 // Wait all APs waken up if this is not the 1st broadcast of SIPI
1044 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1045 CpuData
= &CpuMpData
->CpuData
[Index
];
1046 if (Index
!= CpuMpData
->BspNumber
) {
1047 WaitApWakeup (CpuData
->StartupApSignal
);
1052 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1053 CpuData
->ApFunction
= (UINTN
) Procedure
;
1054 CpuData
->ApFunctionArgument
= (UINTN
) ProcedureArgument
;
1055 SetApState (CpuData
, CpuStateReady
);
1057 // Wakeup specified AP
1059 ASSERT (CpuMpData
->InitFlag
!= ApInitConfig
);
1060 *(UINT32
*) CpuData
->StartupApSignal
= WAKEUP_AP_SIGNAL
;
1061 if (ResetVectorRequired
) {
1062 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1064 CpuInfoInHob
[ProcessorNumber
].ApicId
,
1065 (UINT32
) ExchangeInfo
->BufferStart
1069 // Wait specified AP waken up
1071 WaitApWakeup (CpuData
->StartupApSignal
);
1074 if (ResetVectorRequired
) {
1075 FreeResetVector (CpuMpData
);
1080 Calculate timeout value and return the current performance counter value.
1082 Calculate the number of performance counter ticks required for a timeout.
1083 If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1086 @param[in] TimeoutInMicroseconds Timeout value in microseconds.
1087 @param[out] CurrentTime Returns the current value of the performance counter.
1089 @return Expected time stamp counter for timeout.
1090 If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1096 IN UINTN TimeoutInMicroseconds
,
1097 OUT UINT64
*CurrentTime
1100 UINT64 TimeoutInSeconds
;
1101 UINT64 TimestampCounterFreq
;
1104 // Read the current value of the performance counter
1106 *CurrentTime
= GetPerformanceCounter ();
1109 // If TimeoutInMicroseconds is 0, return value is also 0, which is recognized
1112 if (TimeoutInMicroseconds
== 0) {
1117 // GetPerformanceCounterProperties () returns the timestamp counter's frequency
1120 TimestampCounterFreq
= GetPerformanceCounterProperties (NULL
, NULL
);
1123 // Check the potential overflow before calculate the number of ticks for the timeout value.
1125 if (DivU64x64Remainder (MAX_UINT64
, TimeoutInMicroseconds
, NULL
) < TimestampCounterFreq
) {
1127 // Convert microseconds into seconds if direct multiplication overflows
1129 TimeoutInSeconds
= DivU64x32 (TimeoutInMicroseconds
, 1000000);
1131 // Assertion if the final tick count exceeds MAX_UINT64
1133 ASSERT (DivU64x64Remainder (MAX_UINT64
, TimeoutInSeconds
, NULL
) >= TimestampCounterFreq
);
1134 return MultU64x64 (TimestampCounterFreq
, TimeoutInSeconds
);
1137 // No overflow case, multiply the return value with TimeoutInMicroseconds and then divide
1138 // it by 1,000,000, to get the number of ticks for the timeout value.
1142 TimestampCounterFreq
,
1143 TimeoutInMicroseconds
1151 Checks whether timeout expires.
1153 Check whether the number of elapsed performance counter ticks required for
1154 a timeout condition has been reached.
1155 If Timeout is zero, which means infinity, return value is always FALSE.
1157 @param[in, out] PreviousTime On input, the value of the performance counter
1158 when it was last read.
1159 On output, the current value of the performance
1161 @param[in] TotalTime The total amount of elapsed time in performance
1163 @param[in] Timeout The number of performance counter ticks required
1164 to reach a timeout condition.
1166 @retval TRUE A timeout condition has been reached.
1167 @retval FALSE A timeout condition has not been reached.
1172 IN OUT UINT64
*PreviousTime
,
1173 IN UINT64
*TotalTime
,
1186 GetPerformanceCounterProperties (&Start
, &End
);
1187 Cycle
= End
- Start
;
1192 CurrentTime
= GetPerformanceCounter();
1193 Delta
= (INT64
) (CurrentTime
- *PreviousTime
);
1200 *TotalTime
+= Delta
;
1201 *PreviousTime
= CurrentTime
;
1202 if (*TotalTime
> Timeout
) {
1209 Helper function that waits until the finished AP count reaches the specified
1210 limit, or the specified timeout elapses (whichever comes first).
1212 @param[in] CpuMpData Pointer to CPU MP Data.
1213 @param[in] FinishedApLimit The number of finished APs to wait for.
1214 @param[in] TimeLimit The number of microseconds to wait for.
1217 TimedWaitForApFinish (
1218 IN CPU_MP_DATA
*CpuMpData
,
1219 IN UINT32 FinishedApLimit
,
1224 // CalculateTimeout() and CheckTimeout() consider a TimeLimit of 0
1225 // "infinity", so check for (TimeLimit == 0) explicitly.
1227 if (TimeLimit
== 0) {
1231 CpuMpData
->TotalTime
= 0;
1232 CpuMpData
->ExpectedTime
= CalculateTimeout (
1234 &CpuMpData
->CurrentTime
1236 while (CpuMpData
->FinishedCount
< FinishedApLimit
&&
1238 &CpuMpData
->CurrentTime
,
1239 &CpuMpData
->TotalTime
,
1240 CpuMpData
->ExpectedTime
1245 if (CpuMpData
->FinishedCount
>= FinishedApLimit
) {
1248 "%a: reached FinishedApLimit=%u in %Lu microseconds\n",
1251 DivU64x64Remainder (
1252 MultU64x32 (CpuMpData
->TotalTime
, 1000000),
1253 GetPerformanceCounterProperties (NULL
, NULL
),
1261 Reset an AP to Idle state.
1263 Any task being executed by the AP will be aborted and the AP
1264 will be waiting for a new task in Wait-For-SIPI state.
1266 @param[in] ProcessorNumber The handle number of processor.
1269 ResetProcessorToIdleState (
1270 IN UINTN ProcessorNumber
1273 CPU_MP_DATA
*CpuMpData
;
1275 CpuMpData
= GetCpuMpData ();
1277 CpuMpData
->InitFlag
= ApInitReconfig
;
1278 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, NULL
, NULL
);
1279 while (CpuMpData
->FinishedCount
< 1) {
1282 CpuMpData
->InitFlag
= ApInitDone
;
1284 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateIdle
);
1288 Searches for the next waiting AP.
1290 Search for the next AP that is put in waiting state by single-threaded StartupAllAPs().
1292 @param[out] NextProcessorNumber Pointer to the processor number of the next waiting AP.
1294 @retval EFI_SUCCESS The next waiting AP has been found.
1295 @retval EFI_NOT_FOUND No waiting AP exists.
1299 GetNextWaitingProcessorNumber (
1300 OUT UINTN
*NextProcessorNumber
1303 UINTN ProcessorNumber
;
1304 CPU_MP_DATA
*CpuMpData
;
1306 CpuMpData
= GetCpuMpData ();
1308 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1309 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1310 *NextProcessorNumber
= ProcessorNumber
;
1315 return EFI_NOT_FOUND
;
1318 /** Checks status of specified AP.
1320 This function checks whether the specified AP has finished the task assigned
1321 by StartupThisAP(), and whether timeout expires.
1323 @param[in] ProcessorNumber The handle number of processor.
1325 @retval EFI_SUCCESS Specified AP has finished task assigned by StartupThisAPs().
1326 @retval EFI_TIMEOUT The timeout expires.
1327 @retval EFI_NOT_READY Specified AP has not finished task and timeout has not expired.
1331 IN UINTN ProcessorNumber
1334 CPU_MP_DATA
*CpuMpData
;
1335 CPU_AP_DATA
*CpuData
;
1337 CpuMpData
= GetCpuMpData ();
1338 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1341 // Check the CPU state of AP. If it is CpuStateFinished, then the AP has finished its task.
1342 // Only BSP and corresponding AP access this unit of CPU Data. This means the AP will not modify the
1343 // value of state after setting the it to CpuStateFinished, so BSP can safely make use of its value.
1346 // If the AP finishes for StartupThisAP(), return EFI_SUCCESS.
1348 if (GetApState(CpuData
) == CpuStateFinished
) {
1349 if (CpuData
->Finished
!= NULL
) {
1350 *(CpuData
->Finished
) = TRUE
;
1352 SetApState (CpuData
, CpuStateIdle
);
1356 // If timeout expires for StartupThisAP(), report timeout.
1358 if (CheckTimeout (&CpuData
->CurrentTime
, &CpuData
->TotalTime
, CpuData
->ExpectedTime
)) {
1359 if (CpuData
->Finished
!= NULL
) {
1360 *(CpuData
->Finished
) = FALSE
;
1363 // Reset failed AP to idle state
1365 ResetProcessorToIdleState (ProcessorNumber
);
1370 return EFI_NOT_READY
;
1374 Checks status of all APs.
1376 This function checks whether all APs have finished task assigned by StartupAllAPs(),
1377 and whether timeout expires.
1379 @retval EFI_SUCCESS All APs have finished task assigned by StartupAllAPs().
1380 @retval EFI_TIMEOUT The timeout expires.
1381 @retval EFI_NOT_READY APs have not finished task and timeout has not expired.
1388 UINTN ProcessorNumber
;
1389 UINTN NextProcessorNumber
;
1392 CPU_MP_DATA
*CpuMpData
;
1393 CPU_AP_DATA
*CpuData
;
1395 CpuMpData
= GetCpuMpData ();
1397 NextProcessorNumber
= 0;
1400 // Go through all APs that are responsible for the StartupAllAPs().
1402 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1403 if (!CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1407 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
1409 // Check the CPU state of AP. If it is CpuStateFinished, then the AP has finished its task.
1410 // Only BSP and corresponding AP access this unit of CPU Data. This means the AP will not modify the
1411 // value of state after setting the it to CpuStateFinished, so BSP can safely make use of its value.
1413 if (GetApState(CpuData
) == CpuStateFinished
) {
1414 CpuMpData
->RunningCount
++;
1415 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
1416 SetApState(CpuData
, CpuStateIdle
);
1419 // If in Single Thread mode, then search for the next waiting AP for execution.
1421 if (CpuMpData
->SingleThread
) {
1422 Status
= GetNextWaitingProcessorNumber (&NextProcessorNumber
);
1424 if (!EFI_ERROR (Status
)) {
1428 (UINT32
) NextProcessorNumber
,
1429 CpuMpData
->Procedure
,
1430 CpuMpData
->ProcArguments
1438 // If all APs finish, return EFI_SUCCESS.
1440 if (CpuMpData
->RunningCount
== CpuMpData
->StartCount
) {
1445 // If timeout expires, report timeout.
1448 &CpuMpData
->CurrentTime
,
1449 &CpuMpData
->TotalTime
,
1450 CpuMpData
->ExpectedTime
)
1453 // If FailedCpuList is not NULL, record all failed APs in it.
1455 if (CpuMpData
->FailedCpuList
!= NULL
) {
1456 *CpuMpData
->FailedCpuList
=
1457 AllocatePool ((CpuMpData
->StartCount
- CpuMpData
->FinishedCount
+ 1) * sizeof (UINTN
));
1458 ASSERT (*CpuMpData
->FailedCpuList
!= NULL
);
1462 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
1464 // Check whether this processor is responsible for StartupAllAPs().
1466 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
1468 // Reset failed APs to idle state
1470 ResetProcessorToIdleState (ProcessorNumber
);
1471 CpuMpData
->CpuData
[ProcessorNumber
].Waiting
= FALSE
;
1472 if (CpuMpData
->FailedCpuList
!= NULL
) {
1473 (*CpuMpData
->FailedCpuList
)[ListIndex
++] = ProcessorNumber
;
1477 if (CpuMpData
->FailedCpuList
!= NULL
) {
1478 (*CpuMpData
->FailedCpuList
)[ListIndex
] = END_OF_CPU_LIST
;
1482 return EFI_NOT_READY
;
1486 MP Initialize Library initialization.
1488 This service will allocate AP reset vector and wakeup all APs to do APs
1491 This service must be invoked before all other MP Initialize Library
1492 service are invoked.
1494 @retval EFI_SUCCESS MP initialization succeeds.
1495 @retval Others MP initialization fails.
1500 MpInitLibInitialize (
1504 CPU_MP_DATA
*OldCpuMpData
;
1505 CPU_INFO_IN_HOB
*CpuInfoInHob
;
1506 UINT32 MaxLogicalProcessorNumber
;
1508 MP_ASSEMBLY_ADDRESS_MAP AddressMap
;
1510 UINT32 MonitorFilterSize
;
1513 CPU_MP_DATA
*CpuMpData
;
1515 UINT8
*MonitorBuffer
;
1517 UINTN ApResetVectorSize
;
1518 UINTN BackupBufferAddr
;
1520 OldCpuMpData
= GetCpuMpDataFromGuidedHob ();
1521 if (OldCpuMpData
== NULL
) {
1522 MaxLogicalProcessorNumber
= PcdGet32(PcdCpuMaxLogicalProcessorNumber
);
1524 MaxLogicalProcessorNumber
= OldCpuMpData
->CpuCount
;
1526 ASSERT (MaxLogicalProcessorNumber
!= 0);
1528 AsmGetAddressMap (&AddressMap
);
1529 ApResetVectorSize
= AddressMap
.RendezvousFunnelSize
+ sizeof (MP_CPU_EXCHANGE_INFO
);
1530 ApStackSize
= PcdGet32(PcdCpuApStackSize
);
1531 ApLoopMode
= GetApLoopMode (&MonitorFilterSize
);
1533 BufferSize
= ApStackSize
* MaxLogicalProcessorNumber
;
1534 BufferSize
+= MonitorFilterSize
* MaxLogicalProcessorNumber
;
1535 BufferSize
+= sizeof (CPU_MP_DATA
);
1536 BufferSize
+= ApResetVectorSize
;
1537 BufferSize
+= (sizeof (CPU_AP_DATA
) + sizeof (CPU_INFO_IN_HOB
))* MaxLogicalProcessorNumber
;
1538 MpBuffer
= AllocatePages (EFI_SIZE_TO_PAGES (BufferSize
));
1539 ASSERT (MpBuffer
!= NULL
);
1540 ZeroMem (MpBuffer
, BufferSize
);
1541 Buffer
= (UINTN
) MpBuffer
;
1543 MonitorBuffer
= (UINT8
*) (Buffer
+ ApStackSize
* MaxLogicalProcessorNumber
);
1544 BackupBufferAddr
= (UINTN
) MonitorBuffer
+ MonitorFilterSize
* MaxLogicalProcessorNumber
;
1545 CpuMpData
= (CPU_MP_DATA
*) (BackupBufferAddr
+ ApResetVectorSize
);
1546 CpuMpData
->Buffer
= Buffer
;
1547 CpuMpData
->CpuApStackSize
= ApStackSize
;
1548 CpuMpData
->BackupBuffer
= BackupBufferAddr
;
1549 CpuMpData
->BackupBufferSize
= ApResetVectorSize
;
1550 CpuMpData
->WakeupBuffer
= (UINTN
) -1;
1551 CpuMpData
->CpuCount
= 1;
1552 CpuMpData
->BspNumber
= 0;
1553 CpuMpData
->WaitEvent
= NULL
;
1554 CpuMpData
->SwitchBspFlag
= FALSE
;
1555 CpuMpData
->CpuData
= (CPU_AP_DATA
*) (CpuMpData
+ 1);
1556 CpuMpData
->CpuInfoInHob
= (UINT64
) (UINTN
) (CpuMpData
->CpuData
+ MaxLogicalProcessorNumber
);
1557 CpuMpData
->MicrocodePatchAddress
= PcdGet64 (PcdCpuMicrocodePatchAddress
);
1558 CpuMpData
->MicrocodePatchRegionSize
= PcdGet64 (PcdCpuMicrocodePatchRegionSize
);
1559 InitializeSpinLock(&CpuMpData
->MpLock
);
1561 // Save BSP's Control registers to APs
1563 SaveVolatileRegisters (&CpuMpData
->CpuData
[0].VolatileRegisters
);
1565 // Set BSP basic information
1567 InitializeApData (CpuMpData
, 0, 0, CpuMpData
->Buffer
+ ApStackSize
);
1569 // Save assembly code information
1571 CopyMem (&CpuMpData
->AddressMap
, &AddressMap
, sizeof (MP_ASSEMBLY_ADDRESS_MAP
));
1573 // Finally set AP loop mode
1575 CpuMpData
->ApLoopMode
= ApLoopMode
;
1576 DEBUG ((DEBUG_INFO
, "AP Loop Mode is %d\n", CpuMpData
->ApLoopMode
));
1578 // Set up APs wakeup signal buffer
1580 for (Index
= 0; Index
< MaxLogicalProcessorNumber
; Index
++) {
1581 CpuMpData
->CpuData
[Index
].StartupApSignal
=
1582 (UINT32
*)(MonitorBuffer
+ MonitorFilterSize
* Index
);
1585 // Load Microcode on BSP
1587 MicrocodeDetect (CpuMpData
);
1589 // Store BSP's MTRR setting
1591 MtrrGetAllMtrrs (&CpuMpData
->MtrrTable
);
1593 // Enable the local APIC for Virtual Wire Mode.
1595 ProgramVirtualWireMode ();
1597 if (OldCpuMpData
== NULL
) {
1598 if (MaxLogicalProcessorNumber
> 1) {
1600 // Wakeup all APs and calculate the processor count in system
1602 CollectProcessorCount (CpuMpData
);
1606 // APs have been wakeup before, just get the CPU Information
1609 CpuMpData
->CpuCount
= OldCpuMpData
->CpuCount
;
1610 CpuMpData
->BspNumber
= OldCpuMpData
->BspNumber
;
1611 CpuMpData
->InitFlag
= ApInitReconfig
;
1612 CpuMpData
->CpuInfoInHob
= OldCpuMpData
->CpuInfoInHob
;
1613 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1614 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1615 InitializeSpinLock(&CpuMpData
->CpuData
[Index
].ApLock
);
1616 if (CpuInfoInHob
[Index
].InitialApicId
>= 255 || Index
> 254) {
1617 CpuMpData
->X2ApicEnable
= TRUE
;
1619 CpuMpData
->CpuData
[Index
].CpuHealthy
= (CpuInfoInHob
[Index
].Health
== 0)? TRUE
:FALSE
;
1620 CpuMpData
->CpuData
[Index
].ApFunction
= 0;
1622 &CpuMpData
->CpuData
[Index
].VolatileRegisters
,
1623 &CpuMpData
->CpuData
[0].VolatileRegisters
,
1624 sizeof (CPU_VOLATILE_REGISTERS
)
1627 if (MaxLogicalProcessorNumber
> 1) {
1629 // Wakeup APs to do some AP initialize sync
1631 WakeUpAP (CpuMpData
, TRUE
, 0, ApInitializeSync
, CpuMpData
);
1633 // Wait for all APs finished initialization
1635 while (CpuMpData
->FinishedCount
< (CpuMpData
->CpuCount
- 1)) {
1638 CpuMpData
->InitFlag
= ApInitDone
;
1639 for (Index
= 0; Index
< CpuMpData
->CpuCount
; Index
++) {
1640 SetApState (&CpuMpData
->CpuData
[Index
], CpuStateIdle
);
1646 // Initialize global data for MP support
1648 InitMpGlobalData (CpuMpData
);
1654 Gets detailed MP-related information on the requested processor at the
1655 instant this call is made. This service may only be called from the BSP.
1657 @param[in] ProcessorNumber The handle number of processor.
1658 @param[out] ProcessorInfoBuffer A pointer to the buffer where information for
1659 the requested processor is deposited.
1660 @param[out] HealthData Return processor health data.
1662 @retval EFI_SUCCESS Processor information was returned.
1663 @retval EFI_DEVICE_ERROR The calling processor is an AP.
1664 @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
1665 @retval EFI_NOT_FOUND The processor with the handle specified by
1666 ProcessorNumber does not exist in the platform.
1667 @retval EFI_NOT_READY MP Initialize Library is not initialized.
1672 MpInitLibGetProcessorInfo (
1673 IN UINTN ProcessorNumber
,
1674 OUT EFI_PROCESSOR_INFORMATION
*ProcessorInfoBuffer
,
1675 OUT EFI_HEALTH_FLAGS
*HealthData OPTIONAL
1678 CPU_MP_DATA
*CpuMpData
;
1680 CPU_INFO_IN_HOB
*CpuInfoInHob
;
1682 CpuMpData
= GetCpuMpData ();
1683 CpuInfoInHob
= (CPU_INFO_IN_HOB
*) (UINTN
) CpuMpData
->CpuInfoInHob
;
1686 // Check whether caller processor is BSP
1688 MpInitLibWhoAmI (&CallerNumber
);
1689 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1690 return EFI_DEVICE_ERROR
;
1693 if (ProcessorInfoBuffer
== NULL
) {
1694 return EFI_INVALID_PARAMETER
;
1697 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
1698 return EFI_NOT_FOUND
;
1701 ProcessorInfoBuffer
->ProcessorId
= (UINT64
) CpuInfoInHob
[ProcessorNumber
].ApicId
;
1702 ProcessorInfoBuffer
->StatusFlag
= 0;
1703 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
1704 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_AS_BSP_BIT
;
1706 if (CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
) {
1707 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_HEALTH_STATUS_BIT
;
1709 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateDisabled
) {
1710 ProcessorInfoBuffer
->StatusFlag
&= ~PROCESSOR_ENABLED_BIT
;
1712 ProcessorInfoBuffer
->StatusFlag
|= PROCESSOR_ENABLED_BIT
;
1716 // Get processor location information
1718 GetProcessorLocationByApicId (
1719 CpuInfoInHob
[ProcessorNumber
].ApicId
,
1720 &ProcessorInfoBuffer
->Location
.Package
,
1721 &ProcessorInfoBuffer
->Location
.Core
,
1722 &ProcessorInfoBuffer
->Location
.Thread
1725 if (HealthData
!= NULL
) {
1726 HealthData
->Uint32
= CpuInfoInHob
[ProcessorNumber
].Health
;
1733 Worker function to switch the requested AP to be the BSP from that point onward.
1735 @param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
1736 @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
1737 enabled AP. Otherwise, it will be disabled.
1739 @retval EFI_SUCCESS BSP successfully switched.
1740 @retval others Failed to switch BSP.
1745 IN UINTN ProcessorNumber
,
1746 IN BOOLEAN EnableOldBSP
1749 CPU_MP_DATA
*CpuMpData
;
1752 MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr
;
1753 BOOLEAN OldInterruptState
;
1754 BOOLEAN OldTimerInterruptState
;
1757 // Save and Disable Local APIC timer interrupt
1759 OldTimerInterruptState
= GetApicTimerInterruptState ();
1760 DisableApicTimerInterrupt ();
1762 // Before send both BSP and AP to a procedure to exchange their roles,
1763 // interrupt must be disabled. This is because during the exchange role
1764 // process, 2 CPU may use 1 stack. If interrupt happens, the stack will
1765 // be corrupted, since interrupt return address will be pushed to stack
1768 OldInterruptState
= SaveAndDisableInterrupts ();
1771 // Mask LINT0 & LINT1 for the old BSP
1773 DisableLvtInterrupts ();
1775 CpuMpData
= GetCpuMpData ();
1778 // Check whether caller processor is BSP
1780 MpInitLibWhoAmI (&CallerNumber
);
1781 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1782 return EFI_DEVICE_ERROR
;
1785 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
1786 return EFI_NOT_FOUND
;
1790 // Check whether specified AP is disabled
1792 State
= GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]);
1793 if (State
== CpuStateDisabled
) {
1794 return EFI_INVALID_PARAMETER
;
1798 // Check whether ProcessorNumber specifies the current BSP
1800 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
1801 return EFI_INVALID_PARAMETER
;
1805 // Check whether specified AP is busy
1807 if (State
== CpuStateBusy
) {
1808 return EFI_NOT_READY
;
1811 CpuMpData
->BSPInfo
.State
= CPU_SWITCH_STATE_IDLE
;
1812 CpuMpData
->APInfo
.State
= CPU_SWITCH_STATE_IDLE
;
1813 CpuMpData
->SwitchBspFlag
= TRUE
;
1814 CpuMpData
->NewBspNumber
= ProcessorNumber
;
1817 // Clear the BSP bit of MSR_IA32_APIC_BASE
1819 ApicBaseMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_APIC_BASE
);
1820 ApicBaseMsr
.Bits
.BSP
= 0;
1821 AsmWriteMsr64 (MSR_IA32_APIC_BASE
, ApicBaseMsr
.Uint64
);
1824 // Need to wakeUp AP (future BSP).
1826 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, FutureBSPProc
, CpuMpData
);
1828 AsmExchangeRole (&CpuMpData
->BSPInfo
, &CpuMpData
->APInfo
);
1831 // Set the BSP bit of MSR_IA32_APIC_BASE on new BSP
1833 ApicBaseMsr
.Uint64
= AsmReadMsr64 (MSR_IA32_APIC_BASE
);
1834 ApicBaseMsr
.Bits
.BSP
= 1;
1835 AsmWriteMsr64 (MSR_IA32_APIC_BASE
, ApicBaseMsr
.Uint64
);
1836 ProgramVirtualWireMode ();
1839 // Wait for old BSP finished AP task
1841 while (GetApState (&CpuMpData
->CpuData
[CallerNumber
]) != CpuStateFinished
) {
1845 CpuMpData
->SwitchBspFlag
= FALSE
;
1847 // Set old BSP enable state
1849 if (!EnableOldBSP
) {
1850 SetApState (&CpuMpData
->CpuData
[CallerNumber
], CpuStateDisabled
);
1852 SetApState (&CpuMpData
->CpuData
[CallerNumber
], CpuStateIdle
);
1855 // Save new BSP number
1857 CpuMpData
->BspNumber
= (UINT32
) ProcessorNumber
;
1860 // Restore interrupt state.
1862 SetInterruptState (OldInterruptState
);
1864 if (OldTimerInterruptState
) {
1865 EnableApicTimerInterrupt ();
1872 Worker function to let the caller enable or disable an AP from this point onward.
1873 This service may only be called from the BSP.
1875 @param[in] ProcessorNumber The handle number of AP.
1876 @param[in] EnableAP Specifies the new state for the processor for
1877 enabled, FALSE for disabled.
1878 @param[in] HealthFlag If not NULL, a pointer to a value that specifies
1879 the new health status of the AP.
1881 @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
1882 @retval others Failed to Enable/Disable AP.
1886 EnableDisableApWorker (
1887 IN UINTN ProcessorNumber
,
1888 IN BOOLEAN EnableAP
,
1889 IN UINT32
*HealthFlag OPTIONAL
1892 CPU_MP_DATA
*CpuMpData
;
1895 CpuMpData
= GetCpuMpData ();
1898 // Check whether caller processor is BSP
1900 MpInitLibWhoAmI (&CallerNumber
);
1901 if (CallerNumber
!= CpuMpData
->BspNumber
) {
1902 return EFI_DEVICE_ERROR
;
1905 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
1906 return EFI_INVALID_PARAMETER
;
1909 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
1910 return EFI_NOT_FOUND
;
1914 SetApState (&CpuMpData
->CpuData
[ProcessorNumber
], CpuStateDisabled
);
1916 ResetProcessorToIdleState (ProcessorNumber
);
1919 if (HealthFlag
!= NULL
) {
1920 CpuMpData
->CpuData
[ProcessorNumber
].CpuHealthy
=
1921 (BOOLEAN
) ((*HealthFlag
& PROCESSOR_HEALTH_STATUS_BIT
) != 0);
1928 This return the handle number for the calling processor. This service may be
1929 called from the BSP and APs.
1931 @param[out] ProcessorNumber Pointer to the handle number of AP.
1932 The range is from 0 to the total number of
1933 logical processors minus 1. The total number of
1934 logical processors can be retrieved by
1935 MpInitLibGetNumberOfProcessors().
1937 @retval EFI_SUCCESS The current processor handle number was returned
1939 @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
1940 @retval EFI_NOT_READY MP Initialize Library is not initialized.
1946 OUT UINTN
*ProcessorNumber
1949 CPU_MP_DATA
*CpuMpData
;
1951 if (ProcessorNumber
== NULL
) {
1952 return EFI_INVALID_PARAMETER
;
1955 CpuMpData
= GetCpuMpData ();
1957 return GetProcessorNumber (CpuMpData
, ProcessorNumber
);
1961 Retrieves the number of logical processor in the platform and the number of
1962 those logical processors that are enabled on this boot. This service may only
1963 be called from the BSP.
1965 @param[out] NumberOfProcessors Pointer to the total number of logical
1966 processors in the system, including the BSP
1968 @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
1969 processors that exist in system, including
1972 @retval EFI_SUCCESS The number of logical processors and enabled
1973 logical processors was retrieved.
1974 @retval EFI_DEVICE_ERROR The calling processor is an AP.
1975 @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL and NumberOfEnabledProcessors
1977 @retval EFI_NOT_READY MP Initialize Library is not initialized.
1982 MpInitLibGetNumberOfProcessors (
1983 OUT UINTN
*NumberOfProcessors
, OPTIONAL
1984 OUT UINTN
*NumberOfEnabledProcessors OPTIONAL
1987 CPU_MP_DATA
*CpuMpData
;
1989 UINTN ProcessorNumber
;
1990 UINTN EnabledProcessorNumber
;
1993 CpuMpData
= GetCpuMpData ();
1995 if ((NumberOfProcessors
== NULL
) && (NumberOfEnabledProcessors
== NULL
)) {
1996 return EFI_INVALID_PARAMETER
;
2000 // Check whether caller processor is BSP
2002 MpInitLibWhoAmI (&CallerNumber
);
2003 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2004 return EFI_DEVICE_ERROR
;
2007 ProcessorNumber
= CpuMpData
->CpuCount
;
2008 EnabledProcessorNumber
= 0;
2009 for (Index
= 0; Index
< ProcessorNumber
; Index
++) {
2010 if (GetApState (&CpuMpData
->CpuData
[Index
]) != CpuStateDisabled
) {
2011 EnabledProcessorNumber
++;
2015 if (NumberOfProcessors
!= NULL
) {
2016 *NumberOfProcessors
= ProcessorNumber
;
2018 if (NumberOfEnabledProcessors
!= NULL
) {
2019 *NumberOfEnabledProcessors
= EnabledProcessorNumber
;
2027 Worker function to execute a caller provided function on all enabled APs.
2029 @param[in] Procedure A pointer to the function to be run on
2030 enabled APs of the system.
2031 @param[in] SingleThread If TRUE, then all the enabled APs execute
2032 the function specified by Procedure one by
2033 one, in ascending order of processor handle
2034 number. If FALSE, then all the enabled APs
2035 execute the function specified by Procedure
2037 @param[in] WaitEvent The event created by the caller with CreateEvent()
2039 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
2040 APs to return from Procedure, either for
2041 blocking or non-blocking mode.
2042 @param[in] ProcedureArgument The parameter passed into Procedure for
2044 @param[out] FailedCpuList If all APs finish successfully, then its
2045 content is set to NULL. If not all APs
2046 finish before timeout expires, then its
2047 content is set to address of the buffer
2048 holding handle numbers of the failed APs.
2050 @retval EFI_SUCCESS In blocking mode, all APs have finished before
2051 the timeout expired.
2052 @retval EFI_SUCCESS In non-blocking mode, function has been dispatched
2054 @retval others Failed to Startup all APs.
2058 StartupAllAPsWorker (
2059 IN EFI_AP_PROCEDURE Procedure
,
2060 IN BOOLEAN SingleThread
,
2061 IN EFI_EVENT WaitEvent OPTIONAL
,
2062 IN UINTN TimeoutInMicroseconds
,
2063 IN VOID
*ProcedureArgument OPTIONAL
,
2064 OUT UINTN
**FailedCpuList OPTIONAL
2068 CPU_MP_DATA
*CpuMpData
;
2069 UINTN ProcessorCount
;
2070 UINTN ProcessorNumber
;
2072 CPU_AP_DATA
*CpuData
;
2073 BOOLEAN HasEnabledAp
;
2076 CpuMpData
= GetCpuMpData ();
2078 if (FailedCpuList
!= NULL
) {
2079 *FailedCpuList
= NULL
;
2082 if (CpuMpData
->CpuCount
== 1) {
2083 return EFI_NOT_STARTED
;
2086 if (Procedure
== NULL
) {
2087 return EFI_INVALID_PARAMETER
;
2091 // Check whether caller processor is BSP
2093 MpInitLibWhoAmI (&CallerNumber
);
2094 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2095 return EFI_DEVICE_ERROR
;
2101 CheckAndUpdateApsStatus ();
2103 ProcessorCount
= CpuMpData
->CpuCount
;
2104 HasEnabledAp
= FALSE
;
2106 // Check whether all enabled APs are idle.
2107 // If any enabled AP is not idle, return EFI_NOT_READY.
2109 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2110 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2111 if (ProcessorNumber
!= CpuMpData
->BspNumber
) {
2112 ApState
= GetApState (CpuData
);
2113 if (ApState
!= CpuStateDisabled
) {
2114 HasEnabledAp
= TRUE
;
2115 if (ApState
!= CpuStateIdle
) {
2117 // If any enabled APs are busy, return EFI_NOT_READY.
2119 return EFI_NOT_READY
;
2125 if (!HasEnabledAp
) {
2127 // If no enabled AP exists, return EFI_NOT_STARTED.
2129 return EFI_NOT_STARTED
;
2132 CpuMpData
->StartCount
= 0;
2133 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2134 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2135 CpuData
->Waiting
= FALSE
;
2136 if (ProcessorNumber
!= CpuMpData
->BspNumber
) {
2137 if (CpuData
->State
== CpuStateIdle
) {
2139 // Mark this processor as responsible for current calling.
2141 CpuData
->Waiting
= TRUE
;
2142 CpuMpData
->StartCount
++;
2147 CpuMpData
->Procedure
= Procedure
;
2148 CpuMpData
->ProcArguments
= ProcedureArgument
;
2149 CpuMpData
->SingleThread
= SingleThread
;
2150 CpuMpData
->FinishedCount
= 0;
2151 CpuMpData
->RunningCount
= 0;
2152 CpuMpData
->FailedCpuList
= FailedCpuList
;
2153 CpuMpData
->ExpectedTime
= CalculateTimeout (
2154 TimeoutInMicroseconds
,
2155 &CpuMpData
->CurrentTime
2157 CpuMpData
->TotalTime
= 0;
2158 CpuMpData
->WaitEvent
= WaitEvent
;
2160 if (!SingleThread
) {
2161 WakeUpAP (CpuMpData
, TRUE
, 0, Procedure
, ProcedureArgument
);
2163 for (ProcessorNumber
= 0; ProcessorNumber
< ProcessorCount
; ProcessorNumber
++) {
2164 if (ProcessorNumber
== CallerNumber
) {
2167 if (CpuMpData
->CpuData
[ProcessorNumber
].Waiting
) {
2168 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, Procedure
, ProcedureArgument
);
2174 Status
= EFI_SUCCESS
;
2175 if (WaitEvent
== NULL
) {
2177 Status
= CheckAllAPs ();
2178 } while (Status
== EFI_NOT_READY
);
2185 Worker function to let the caller get one enabled AP to execute a caller-provided
2188 @param[in] Procedure A pointer to the function to be run on
2189 enabled APs of the system.
2190 @param[in] ProcessorNumber The handle number of the AP.
2191 @param[in] WaitEvent The event created by the caller with CreateEvent()
2193 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
2194 APs to return from Procedure, either for
2195 blocking or non-blocking mode.
2196 @param[in] ProcedureArgument The parameter passed into Procedure for
2198 @param[out] Finished If AP returns from Procedure before the
2199 timeout expires, its content is set to TRUE.
2200 Otherwise, the value is set to FALSE.
2202 @retval EFI_SUCCESS In blocking mode, specified AP finished before
2203 the timeout expires.
2204 @retval others Failed to Startup AP.
2208 StartupThisAPWorker (
2209 IN EFI_AP_PROCEDURE Procedure
,
2210 IN UINTN ProcessorNumber
,
2211 IN EFI_EVENT WaitEvent OPTIONAL
,
2212 IN UINTN TimeoutInMicroseconds
,
2213 IN VOID
*ProcedureArgument OPTIONAL
,
2214 OUT BOOLEAN
*Finished OPTIONAL
2218 CPU_MP_DATA
*CpuMpData
;
2219 CPU_AP_DATA
*CpuData
;
2222 CpuMpData
= GetCpuMpData ();
2224 if (Finished
!= NULL
) {
2229 // Check whether caller processor is BSP
2231 MpInitLibWhoAmI (&CallerNumber
);
2232 if (CallerNumber
!= CpuMpData
->BspNumber
) {
2233 return EFI_DEVICE_ERROR
;
2237 // Check whether processor with the handle specified by ProcessorNumber exists
2239 if (ProcessorNumber
>= CpuMpData
->CpuCount
) {
2240 return EFI_NOT_FOUND
;
2244 // Check whether specified processor is BSP
2246 if (ProcessorNumber
== CpuMpData
->BspNumber
) {
2247 return EFI_INVALID_PARAMETER
;
2251 // Check parameter Procedure
2253 if (Procedure
== NULL
) {
2254 return EFI_INVALID_PARAMETER
;
2260 CheckAndUpdateApsStatus ();
2263 // Check whether specified AP is disabled
2265 if (GetApState (&CpuMpData
->CpuData
[ProcessorNumber
]) == CpuStateDisabled
) {
2266 return EFI_INVALID_PARAMETER
;
2270 // If WaitEvent is not NULL, execute in non-blocking mode.
2271 // BSP saves data for CheckAPsStatus(), and returns EFI_SUCCESS.
2272 // CheckAPsStatus() will check completion and timeout periodically.
2274 CpuData
= &CpuMpData
->CpuData
[ProcessorNumber
];
2275 CpuData
->WaitEvent
= WaitEvent
;
2276 CpuData
->Finished
= Finished
;
2277 CpuData
->ExpectedTime
= CalculateTimeout (TimeoutInMicroseconds
, &CpuData
->CurrentTime
);
2278 CpuData
->TotalTime
= 0;
2280 WakeUpAP (CpuMpData
, FALSE
, ProcessorNumber
, Procedure
, ProcedureArgument
);
2283 // If WaitEvent is NULL, execute in blocking mode.
2284 // BSP checks AP's state until it finishes or TimeoutInMicrosecsond expires.
2286 Status
= EFI_SUCCESS
;
2287 if (WaitEvent
== NULL
) {
2289 Status
= CheckThisAP (ProcessorNumber
);
2290 } while (Status
== EFI_NOT_READY
);
2297 Get pointer to CPU MP Data structure from GUIDed HOB.
2299 @return The pointer to CPU MP Data structure.
2302 GetCpuMpDataFromGuidedHob (
2306 EFI_HOB_GUID_TYPE
*GuidHob
;
2308 CPU_MP_DATA
*CpuMpData
;
2311 GuidHob
= GetFirstGuidHob (&mCpuInitMpLibHobGuid
);
2312 if (GuidHob
!= NULL
) {
2313 DataInHob
= GET_GUID_HOB_DATA (GuidHob
);
2314 CpuMpData
= (CPU_MP_DATA
*) (*(UINTN
*) DataInHob
);