2 MP initialize support functions for DXE phase.
4 Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
11 #include <Library/UefiLib.h>
12 #include <Library/UefiBootServicesTableLib.h>
13 #include <Library/DebugAgentLib.h>
14 #include <Library/DxeServicesTableLib.h>
16 #include <Protocol/Timer.h>
18 #define AP_SAFE_STACK_SIZE 128
20 CPU_MP_DATA
*mCpuMpData
= NULL
;
21 EFI_EVENT mCheckAllApsEvent
= NULL
;
22 EFI_EVENT mMpInitExitBootServicesEvent
= NULL
;
23 EFI_EVENT mLegacyBootEvent
= NULL
;
24 volatile BOOLEAN mStopCheckAllApsStatus
= TRUE
;
25 VOID
*mReservedApLoopFunc
= NULL
;
26 UINTN mReservedTopOfApStack
;
27 volatile UINT32 mNumberToFinish
= 0;
30 Enable Debug Agent to support source debugging on AP function.
39 // Initialize Debug Agent to support source level debug in DXE phase
41 InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_AP
, NULL
, NULL
);
45 Get the pointer to CPU MP Data structure.
47 @return The pointer to CPU MP Data structure.
54 ASSERT (mCpuMpData
!= NULL
);
59 Save the pointer to CPU MP Data structure.
61 @param[in] CpuMpData The pointer to CPU MP Data structure will be saved.
65 IN CPU_MP_DATA
*CpuMpData
68 mCpuMpData
= CpuMpData
;
72 Get available system memory below 0x88000 by specified size.
74 @param[in] WakeupBufferSize Wakeup buffer size required
76 @retval other Return wakeup buffer address below 1MB.
77 @retval -1 Cannot find free memory below 1MB.
81 IN UINTN WakeupBufferSize
85 EFI_PHYSICAL_ADDRESS StartAddress
;
88 // Try to allocate buffer below 1M for waking vector.
89 // LegacyBios driver only reports warning when page allocation in range
90 // [0x60000, 0x88000) fails.
91 // This library is consumed by CpuDxe driver to produce CPU Arch protocol.
92 // LagacyBios driver depends on CPU Arch protocol which guarantees below
93 // allocation runs earlier than LegacyBios driver.
95 StartAddress
= 0x88000;
96 Status
= gBS
->AllocatePages (
99 EFI_SIZE_TO_PAGES (WakeupBufferSize
),
102 ASSERT_EFI_ERROR (Status
);
103 if (EFI_ERROR (Status
)) {
104 StartAddress
= (EFI_PHYSICAL_ADDRESS
) -1;
107 DEBUG ((DEBUG_INFO
, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",
108 (UINTN
) StartAddress
, WakeupBufferSize
));
110 return (UINTN
) StartAddress
;
114 Get available EfiBootServicesCode memory below 4GB by specified size.
116 This buffer is required to safely transfer AP from real address mode to
117 protected mode or long mode, due to the fact that the buffer returned by
118 GetWakeupBuffer() may be marked as non-executable.
120 @param[in] BufferSize Wakeup transition buffer size.
122 @retval other Return wakeup transition buffer address below 4GB.
123 @retval 0 Cannot find free memory below 4GB.
126 GetModeTransitionBuffer (
131 EFI_PHYSICAL_ADDRESS StartAddress
;
133 StartAddress
= BASE_4GB
- 1;
134 Status
= gBS
->AllocatePages (
137 EFI_SIZE_TO_PAGES (BufferSize
),
140 if (EFI_ERROR (Status
)) {
144 return (UINTN
)StartAddress
;
148 Checks APs status and updates APs status if needed.
152 CheckAndUpdateApsStatus (
156 UINTN ProcessorNumber
;
158 CPU_MP_DATA
*CpuMpData
;
160 CpuMpData
= GetCpuMpData ();
163 // First, check whether pending StartupAllAPs() exists.
165 if (CpuMpData
->WaitEvent
!= NULL
) {
167 Status
= CheckAllAPs ();
169 // If all APs finish for StartupAllAPs(), signal the WaitEvent for it.
171 if (Status
!= EFI_NOT_READY
) {
172 Status
= gBS
->SignalEvent (CpuMpData
->WaitEvent
);
173 CpuMpData
->WaitEvent
= NULL
;
178 // Second, check whether pending StartupThisAPs() callings exist.
180 for (ProcessorNumber
= 0; ProcessorNumber
< CpuMpData
->CpuCount
; ProcessorNumber
++) {
182 if (CpuMpData
->CpuData
[ProcessorNumber
].WaitEvent
== NULL
) {
186 Status
= CheckThisAP (ProcessorNumber
);
188 if (Status
!= EFI_NOT_READY
) {
189 gBS
->SignalEvent (CpuMpData
->CpuData
[ProcessorNumber
].WaitEvent
);
190 CpuMpData
->CpuData
[ProcessorNumber
].WaitEvent
= NULL
;
196 Checks APs' status periodically.
198 This function is triggered by timer periodically to check the
199 state of APs for StartupAllAPs() and StartupThisAP() executed
200 in non-blocking mode.
202 @param[in] Event Event triggered.
203 @param[in] Context Parameter passed with the event.
214 // If CheckApsStatus() is not stopped, otherwise return immediately.
216 if (!mStopCheckAllApsStatus
) {
217 CheckAndUpdateApsStatus ();
222 Get Protected mode code segment from current GDT table.
224 @return Protected mode code segment value.
231 IA32_DESCRIPTOR GdtrDesc
;
232 IA32_SEGMENT_DESCRIPTOR
*GdtEntry
;
236 AsmReadGdtr (&GdtrDesc
);
237 GdtEntryCount
= (GdtrDesc
.Limit
+ 1) / sizeof (IA32_SEGMENT_DESCRIPTOR
);
238 GdtEntry
= (IA32_SEGMENT_DESCRIPTOR
*) GdtrDesc
.Base
;
239 for (Index
= 0; Index
< GdtEntryCount
; Index
++) {
240 if (GdtEntry
->Bits
.L
== 0) {
241 if (GdtEntry
->Bits
.Type
> 8 && GdtEntry
->Bits
.L
== 0) {
247 ASSERT (Index
!= GdtEntryCount
);
254 @param[in, out] Buffer Pointer to private data buffer.
262 CPU_MP_DATA
*CpuMpData
;
263 BOOLEAN MwaitSupport
;
264 ASM_RELOCATE_AP_LOOP AsmRelocateApLoopFunc
;
265 UINTN ProcessorNumber
;
267 MpInitLibWhoAmI (&ProcessorNumber
);
268 CpuMpData
= GetCpuMpData ();
269 MwaitSupport
= IsMwaitSupport ();
270 AsmRelocateApLoopFunc
= (ASM_RELOCATE_AP_LOOP
) (UINTN
) mReservedApLoopFunc
;
271 AsmRelocateApLoopFunc (
273 CpuMpData
->ApTargetCState
,
274 CpuMpData
->PmCodeSegment
,
275 mReservedTopOfApStack
- ProcessorNumber
* AP_SAFE_STACK_SIZE
,
276 (UINTN
) &mNumberToFinish
279 // It should never reach here
285 Callback function for ExitBootServices.
287 @param[in] Event Event whose notification function is being invoked.
288 @param[in] Context The pointer to the notification function's context,
289 which is implementation-dependent.
294 MpInitChangeApLoopCallback (
299 CPU_MP_DATA
*CpuMpData
;
301 CpuMpData
= GetCpuMpData ();
302 CpuMpData
->PmCodeSegment
= GetProtectedModeCS ();
303 CpuMpData
->ApLoopMode
= PcdGet8 (PcdCpuApLoopMode
);
304 mNumberToFinish
= CpuMpData
->CpuCount
- 1;
305 WakeUpAP (CpuMpData
, TRUE
, 0, RelocateApLoop
, NULL
, TRUE
);
306 while (mNumberToFinish
> 0) {
309 DEBUG ((DEBUG_INFO
, "%a() done!\n", __FUNCTION__
));
313 Initialize global data for MP support.
315 @param[in] CpuMpData The pointer to CPU MP Data structure.
319 IN CPU_MP_DATA
*CpuMpData
323 EFI_PHYSICAL_ADDRESS Address
;
324 UINTN ApSafeBufferSize
;
326 EFI_GCD_MEMORY_SPACE_DESCRIPTOR MemDesc
;
328 CPU_INFO_IN_HOB
*CpuInfoInHob
;
330 SaveCpuMpData (CpuMpData
);
332 if (CpuMpData
->CpuCount
== 1) {
334 // If only BSP exists, return
339 if (PcdGetBool (PcdCpuStackGuard
)) {
341 // One extra page at the bottom of the stack is needed for Guard page.
343 if (CpuMpData
->CpuApStackSize
<= EFI_PAGE_SIZE
) {
344 DEBUG ((DEBUG_ERROR
, "PcdCpuApStackSize is not big enough for Stack Guard!\n"));
349 // DXE will reuse stack allocated for APs at PEI phase if it's available.
350 // Let's check it here.
352 // Note: BSP's stack guard is set at DxeIpl phase. But for the sake of
353 // BSP/AP exchange, stack guard for ApTopOfStack of cpu 0 will still be
356 CpuInfoInHob
= (CPU_INFO_IN_HOB
*)(UINTN
)CpuMpData
->CpuInfoInHob
;
357 for (Index
= 0; Index
< CpuMpData
->CpuCount
; ++Index
) {
358 if (CpuInfoInHob
!= NULL
&& CpuInfoInHob
[Index
].ApTopOfStack
!= 0) {
359 StackBase
= (UINTN
)CpuInfoInHob
[Index
].ApTopOfStack
- CpuMpData
->CpuApStackSize
;
361 StackBase
= CpuMpData
->Buffer
+ Index
* CpuMpData
->CpuApStackSize
;
364 Status
= gDS
->GetMemorySpaceDescriptor (StackBase
, &MemDesc
);
365 ASSERT_EFI_ERROR (Status
);
367 Status
= gDS
->SetMemorySpaceAttributes (
369 EFI_PAGES_TO_SIZE (1),
370 MemDesc
.Attributes
| EFI_MEMORY_RP
372 ASSERT_EFI_ERROR (Status
);
374 DEBUG ((DEBUG_INFO
, "Stack Guard set at %lx [cpu%lu]!\n",
375 (UINT64
)StackBase
, (UINT64
)Index
));
380 // Avoid APs access invalid buffer data which allocated by BootServices,
381 // so we will allocate reserved data for AP loop code. We also need to
382 // allocate this buffer below 4GB due to APs may be transferred to 32bit
383 // protected mode on long mode DXE.
384 // Allocating it in advance since memory services are not available in
385 // Exit Boot Services callback function.
387 ApSafeBufferSize
= EFI_PAGES_TO_SIZE (EFI_SIZE_TO_PAGES (
388 CpuMpData
->AddressMap
.RelocateApLoopFuncSize
390 Address
= BASE_4GB
- 1;
391 Status
= gBS
->AllocatePages (
393 EfiReservedMemoryType
,
394 EFI_SIZE_TO_PAGES (ApSafeBufferSize
),
397 ASSERT_EFI_ERROR (Status
);
399 mReservedApLoopFunc
= (VOID
*) (UINTN
) Address
;
400 ASSERT (mReservedApLoopFunc
!= NULL
);
403 // Make sure that the buffer memory is executable if NX protection is enabled
404 // for EfiReservedMemoryType.
406 // TODO: Check EFI_MEMORY_XP bit set or not once it's available in DXE GCD
409 Status
= gDS
->GetMemorySpaceDescriptor (Address
, &MemDesc
);
410 if (!EFI_ERROR (Status
)) {
411 gDS
->SetMemorySpaceAttributes (
414 MemDesc
.Attributes
& (~EFI_MEMORY_XP
)
418 ApSafeBufferSize
= EFI_PAGES_TO_SIZE (EFI_SIZE_TO_PAGES (
419 CpuMpData
->CpuCount
* AP_SAFE_STACK_SIZE
421 Address
= BASE_4GB
- 1;
422 Status
= gBS
->AllocatePages (
424 EfiReservedMemoryType
,
425 EFI_SIZE_TO_PAGES (ApSafeBufferSize
),
428 ASSERT_EFI_ERROR (Status
);
430 mReservedTopOfApStack
= (UINTN
) Address
+ ApSafeBufferSize
;
431 ASSERT ((mReservedTopOfApStack
& (UINTN
)(CPU_STACK_ALIGNMENT
- 1)) == 0);
434 CpuMpData
->AddressMap
.RelocateApLoopFuncAddress
,
435 CpuMpData
->AddressMap
.RelocateApLoopFuncSize
438 Status
= gBS
->CreateEvent (
439 EVT_TIMER
| EVT_NOTIFY_SIGNAL
,
445 ASSERT_EFI_ERROR (Status
);
448 // Set timer to check all APs status.
450 Status
= gBS
->SetTimer (
453 EFI_TIMER_PERIOD_MICROSECONDS (
454 PcdGet32 (PcdCpuApStatusCheckIntervalInMicroSeconds
)
457 ASSERT_EFI_ERROR (Status
);
459 Status
= gBS
->CreateEvent (
460 EVT_SIGNAL_EXIT_BOOT_SERVICES
,
462 MpInitChangeApLoopCallback
,
464 &mMpInitExitBootServicesEvent
466 ASSERT_EFI_ERROR (Status
);
468 Status
= gBS
->CreateEventEx (
471 MpInitChangeApLoopCallback
,
473 &gEfiEventLegacyBootGuid
,
476 ASSERT_EFI_ERROR (Status
);
480 This service executes a caller provided function on all enabled APs.
482 @param[in] Procedure A pointer to the function to be run on
483 enabled APs of the system. See type
485 @param[in] SingleThread If TRUE, then all the enabled APs execute
486 the function specified by Procedure one by
487 one, in ascending order of processor handle
488 number. If FALSE, then all the enabled APs
489 execute the function specified by Procedure
491 @param[in] WaitEvent The event created by the caller with CreateEvent()
492 service. If it is NULL, then execute in
493 blocking mode. BSP waits until all APs finish
494 or TimeoutInMicroSeconds expires. If it's
495 not NULL, then execute in non-blocking mode.
496 BSP requests the function specified by
497 Procedure to be started on all the enabled
498 APs, and go on executing immediately. If
499 all return from Procedure, or TimeoutInMicroSeconds
500 expires, this event is signaled. The BSP
501 can use the CheckEvent() or WaitForEvent()
502 services to check the state of event. Type
503 EFI_EVENT is defined in CreateEvent() in
504 the Unified Extensible Firmware Interface
506 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
507 APs to return from Procedure, either for
508 blocking or non-blocking mode. Zero means
509 infinity. If the timeout expires before
510 all APs return from Procedure, then Procedure
511 on the failed APs is terminated. All enabled
512 APs are available for next function assigned
513 by MpInitLibStartupAllAPs() or
514 MPInitLibStartupThisAP().
515 If the timeout expires in blocking mode,
516 BSP returns EFI_TIMEOUT. If the timeout
517 expires in non-blocking mode, WaitEvent
518 is signaled with SignalEvent().
519 @param[in] ProcedureArgument The parameter passed into Procedure for
521 @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
522 if all APs finish successfully, then its
523 content is set to NULL. If not all APs
524 finish before timeout expires, then its
525 content is set to address of the buffer
526 holding handle numbers of the failed APs.
527 The buffer is allocated by MP Initialization
528 library, and it's the caller's responsibility to
529 free the buffer with FreePool() service.
530 In blocking mode, it is ready for consumption
531 when the call returns. In non-blocking mode,
532 it is ready when WaitEvent is signaled. The
533 list of failed CPU is terminated by
536 @retval EFI_SUCCESS In blocking mode, all APs have finished before
538 @retval EFI_SUCCESS In non-blocking mode, function has been dispatched
540 @retval EFI_UNSUPPORTED A non-blocking mode request was made after the
541 UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
543 @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
545 @retval EFI_DEVICE_ERROR Caller processor is AP.
546 @retval EFI_NOT_STARTED No enabled APs exist in the system.
547 @retval EFI_NOT_READY Any enabled APs are busy.
548 @retval EFI_NOT_READY MP Initialize Library is not initialized.
549 @retval EFI_TIMEOUT In blocking mode, the timeout expired before
550 all enabled APs have finished.
551 @retval EFI_INVALID_PARAMETER Procedure is NULL.
556 MpInitLibStartupAllAPs (
557 IN EFI_AP_PROCEDURE Procedure
,
558 IN BOOLEAN SingleThread
,
559 IN EFI_EVENT WaitEvent OPTIONAL
,
560 IN UINTN TimeoutInMicroseconds
,
561 IN VOID
*ProcedureArgument OPTIONAL
,
562 OUT UINTN
**FailedCpuList OPTIONAL
568 // Temporarily stop checkAllApsStatus for avoid resource dead-lock.
570 mStopCheckAllApsStatus
= TRUE
;
572 Status
= StartupAllCPUsWorker (
577 TimeoutInMicroseconds
,
583 // Start checkAllApsStatus
585 mStopCheckAllApsStatus
= FALSE
;
591 This service lets the caller get one enabled AP to execute a caller-provided
594 @param[in] Procedure A pointer to the function to be run on the
595 designated AP of the system. See type
597 @param[in] ProcessorNumber The handle number of the AP. The range is
598 from 0 to the total number of logical
599 processors minus 1. The total number of
600 logical processors can be retrieved by
601 MpInitLibGetNumberOfProcessors().
602 @param[in] WaitEvent The event created by the caller with CreateEvent()
603 service. If it is NULL, then execute in
604 blocking mode. BSP waits until this AP finish
605 or TimeoutInMicroSeconds expires. If it's
606 not NULL, then execute in non-blocking mode.
607 BSP requests the function specified by
608 Procedure to be started on this AP,
609 and go on executing immediately. If this AP
610 return from Procedure or TimeoutInMicroSeconds
611 expires, this event is signaled. The BSP
612 can use the CheckEvent() or WaitForEvent()
613 services to check the state of event. Type
614 EFI_EVENT is defined in CreateEvent() in
615 the Unified Extensible Firmware Interface
617 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
618 this AP to finish this Procedure, either for
619 blocking or non-blocking mode. Zero means
620 infinity. If the timeout expires before
621 this AP returns from Procedure, then Procedure
622 on the AP is terminated. The
623 AP is available for next function assigned
624 by MpInitLibStartupAllAPs() or
625 MpInitLibStartupThisAP().
626 If the timeout expires in blocking mode,
627 BSP returns EFI_TIMEOUT. If the timeout
628 expires in non-blocking mode, WaitEvent
629 is signaled with SignalEvent().
630 @param[in] ProcedureArgument The parameter passed into Procedure on the
632 @param[out] Finished If NULL, this parameter is ignored. In
633 blocking mode, this parameter is ignored.
634 In non-blocking mode, if AP returns from
635 Procedure before the timeout expires, its
636 content is set to TRUE. Otherwise, the
637 value is set to FALSE. The caller can
638 determine if the AP returned from Procedure
639 by evaluating this value.
641 @retval EFI_SUCCESS In blocking mode, specified AP finished before
643 @retval EFI_SUCCESS In non-blocking mode, the function has been
644 dispatched to specified AP.
645 @retval EFI_UNSUPPORTED A non-blocking mode request was made after the
646 UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
648 @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
650 @retval EFI_DEVICE_ERROR The calling processor is an AP.
651 @retval EFI_TIMEOUT In blocking mode, the timeout expired before
652 the specified AP has finished.
653 @retval EFI_NOT_READY The specified AP is busy.
654 @retval EFI_NOT_READY MP Initialize Library is not initialized.
655 @retval EFI_NOT_FOUND The processor with the handle specified by
656 ProcessorNumber does not exist.
657 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
658 @retval EFI_INVALID_PARAMETER Procedure is NULL.
663 MpInitLibStartupThisAP (
664 IN EFI_AP_PROCEDURE Procedure
,
665 IN UINTN ProcessorNumber
,
666 IN EFI_EVENT WaitEvent OPTIONAL
,
667 IN UINTN TimeoutInMicroseconds
,
668 IN VOID
*ProcedureArgument OPTIONAL
,
669 OUT BOOLEAN
*Finished OPTIONAL
675 // temporarily stop checkAllApsStatus for avoid resource dead-lock.
677 mStopCheckAllApsStatus
= TRUE
;
679 Status
= StartupThisAPWorker (
683 TimeoutInMicroseconds
,
688 mStopCheckAllApsStatus
= FALSE
;
694 This service switches the requested AP to be the BSP from that point onward.
695 This service changes the BSP for all purposes. This call can only be performed
698 @param[in] ProcessorNumber The handle number of AP that is to become the new
699 BSP. The range is from 0 to the total number of
700 logical processors minus 1. The total number of
701 logical processors can be retrieved by
702 MpInitLibGetNumberOfProcessors().
703 @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
704 enabled AP. Otherwise, it will be disabled.
706 @retval EFI_SUCCESS BSP successfully switched.
707 @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
708 this service returning.
709 @retval EFI_UNSUPPORTED Switching the BSP is not supported.
710 @retval EFI_DEVICE_ERROR The calling processor is an AP.
711 @retval EFI_NOT_FOUND The processor with the handle specified by
712 ProcessorNumber does not exist.
713 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
715 @retval EFI_NOT_READY The specified AP is busy.
716 @retval EFI_NOT_READY MP Initialize Library is not initialized.
722 IN UINTN ProcessorNumber
,
723 IN BOOLEAN EnableOldBSP
727 EFI_TIMER_ARCH_PROTOCOL
*Timer
;
732 // Locate Timer Arch Protocol
734 Status
= gBS
->LocateProtocol (&gEfiTimerArchProtocolGuid
, NULL
, (VOID
**) &Timer
);
735 if (EFI_ERROR (Status
)) {
741 // Save current rate of DXE Timer
743 Timer
->GetTimerPeriod (Timer
, &TimerPeriod
);
745 // Disable DXE Timer and drain pending interrupts
747 Timer
->SetTimerPeriod (Timer
, 0);
750 Status
= SwitchBSPWorker (ProcessorNumber
, EnableOldBSP
);
754 // Enable and restore rate of DXE Timer
756 Timer
->SetTimerPeriod (Timer
, TimerPeriod
);
763 This service lets the caller enable or disable an AP from this point onward.
764 This service may only be called from the BSP.
766 @param[in] ProcessorNumber The handle number of AP.
767 The range is from 0 to the total number of
768 logical processors minus 1. The total number of
769 logical processors can be retrieved by
770 MpInitLibGetNumberOfProcessors().
771 @param[in] EnableAP Specifies the new state for the processor for
772 enabled, FALSE for disabled.
773 @param[in] HealthFlag If not NULL, a pointer to a value that specifies
774 the new health status of the AP. This flag
775 corresponds to StatusFlag defined in
776 EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
777 the PROCESSOR_HEALTH_STATUS_BIT is used. All other
778 bits are ignored. If it is NULL, this parameter
781 @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
782 @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
783 prior to this service returning.
784 @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
785 @retval EFI_DEVICE_ERROR The calling processor is an AP.
786 @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
788 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
789 @retval EFI_NOT_READY MP Initialize Library is not initialized.
794 MpInitLibEnableDisableAP (
795 IN UINTN ProcessorNumber
,
797 IN UINT32
*HealthFlag OPTIONAL
801 BOOLEAN TempStopCheckState
;
803 TempStopCheckState
= FALSE
;
805 // temporarily stop checkAllAPsStatus for initialize parameters.
807 if (!mStopCheckAllApsStatus
) {
808 mStopCheckAllApsStatus
= TRUE
;
809 TempStopCheckState
= TRUE
;
812 Status
= EnableDisableApWorker (ProcessorNumber
, EnableAP
, HealthFlag
);
814 if (TempStopCheckState
) {
815 mStopCheckAllApsStatus
= FALSE
;
822 This funtion will try to invoke platform specific microcode shadow logic to
823 relocate microcode update patches into memory.
825 @param[in, out] CpuMpData The pointer to CPU MP Data structure.
827 @retval EFI_SUCCESS Shadow microcode success.
828 @retval EFI_OUT_OF_RESOURCES No enough resource to complete the operation.
829 @retval EFI_UNSUPPORTED Can't find platform specific microcode shadow
833 PlatformShadowMicrocode (
834 IN OUT CPU_MP_DATA
*CpuMpData
838 // There is no DXE version of platform shadow microcode protocol so far.
839 // A platform which only uses DxeMpInitLib instance could only supports
840 // the PCD based microcode shadowing.
842 return EFI_UNSUPPORTED
;