2 Construct MP Services Protocol on top of the EMU Thread protocol.
3 This code makes APs show up in the emulator. PcdEmuApCount is the
4 number of APs the emulator should produce.
6 The MP Services Protocol provides a generalized way of performing following tasks:
7 - Retrieving information of multi-processor environment and MP-related status of
9 - Dispatching user-provided function to APs.
10 - Maintain MP-related processor status.
12 The MP Services Protocol must be produced on any system with more than one logical
15 The Protocol is available only during boot time.
17 MP Services Protocol is hardware-independent. Most of the logic of this protocol
18 is architecturally neutral. It abstracts the multi-processor environment and
19 status of processors, and provides interfaces to retrieve information, maintain,
22 MP Services Protocol may be consumed by ACPI module. The ACPI module may use this
23 protocol to retrieve data that are needed for an MP platform and report them to OS.
24 MP Services Protocol may also be used to program and configure processors, such
25 as MTRR synchronization for memory space attributes setting in DXE Services.
26 MP Services Protocol may be used by non-CPU DXE drivers to speed up platform boot
27 by taking advantage of the processing capabilities of the APs, for example, using
28 APs to help test system memory in parallel with other device initialization.
29 Diagnostics applications may also use this protocol for multi-processor.
31 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
32 Portitions Copyright (c) 2011, Apple Inc. All rights reserved.
33 This program and the accompanying materials are licensed and made available under
34 the terms and conditions of the BSD License that accompanies this distribution.
35 The full text of the license may be found at
36 http://opensource.org/licenses/bsd-license.php.
38 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
39 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
44 #include "CpuDriver.h"
47 MP_SYSTEM_DATA gMPSystem
;
48 EMU_THREAD_THUNK_PROTOCOL
*gThread
= NULL
;
49 EFI_EVENT gReadToBootEvent
;
50 BOOLEAN gReadToBoot
= FALSE
;
60 UINTN ProcessorNumber
;
62 Status
= CpuMpServicesWhoAmI (&mMpSercicesTemplate
, &ProcessorNumber
);
63 if (EFI_ERROR (Status
)) {
67 return (gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0;
73 IN PROCESSOR_DATA_BLOCK
*Processor
,
74 IN EFI_AP_PROCEDURE Procedure
,
75 IN VOID
*ProcedureArgument
78 gThread
->MutexLock (Processor
->ProcedureLock
);
79 Processor
->Parameter
= ProcedureArgument
;
80 Processor
->Procedure
= Procedure
;
81 gThread
->MutexUnlock (Processor
->ProcedureLock
);
86 GetNextBlockedNumber (
91 PROCESSOR_STATE ProcessorState
;
92 PROCESSOR_DATA_BLOCK
*Data
;
94 for (Number
= 0; Number
< gMPSystem
.NumberOfProcessors
; Number
++) {
95 Data
= &gMPSystem
.ProcessorData
[Number
];
96 if ((Data
->Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0) {
101 gThread
->MutexLock (Data
->StateLock
);
102 ProcessorState
= Data
->State
;
103 gThread
->MutexUnlock (Data
->StateLock
);
105 if (ProcessorState
== CPU_STATE_BLOCKED
) {
106 *NextNumber
= Number
;
111 return EFI_NOT_FOUND
;
118 This service retrieves the number of logical processor in the platform
119 and the number of those logical processors that are enabled on this boot.
120 This service may only be called from the BSP.
122 This function is used to retrieve the following information:
123 - The number of logical processors that are present in the system.
124 - The number of enabled logical processors in the system at the instant
127 Because MP Service Protocol provides services to enable and disable processors
128 dynamically, the number of enabled logical processors may vary during the
129 course of a boot session.
131 If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
132 If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
133 EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
134 is returned in NumberOfProcessors, the number of currently enabled processor
135 is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
137 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
139 @param[out] NumberOfProcessors Pointer to the total number of logical
140 processors in the system, including the BSP
142 @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
143 processors that exist in system, including
146 @retval EFI_SUCCESS The number of logical processors and enabled
147 logical processors was retrieved.
148 @retval EFI_DEVICE_ERROR The calling processor is an AP.
149 @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
150 @retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
155 CpuMpServicesGetNumberOfProcessors (
156 IN EFI_MP_SERVICES_PROTOCOL
*This
,
157 OUT UINTN
*NumberOfProcessors
,
158 OUT UINTN
*NumberOfEnabledProcessors
161 if ((NumberOfProcessors
== NULL
) || (NumberOfEnabledProcessors
== NULL
)) {
162 return EFI_INVALID_PARAMETER
;
166 return EFI_DEVICE_ERROR
;
169 *NumberOfProcessors
= gMPSystem
.NumberOfProcessors
;
170 *NumberOfEnabledProcessors
= gMPSystem
.NumberOfEnabledProcessors
;
177 Gets detailed MP-related information on the requested processor at the
178 instant this call is made. This service may only be called from the BSP.
180 This service retrieves detailed MP-related information about any processor
181 on the platform. Note the following:
182 - The processor information may change during the course of a boot session.
183 - The information presented here is entirely MP related.
185 Information regarding the number of caches and their sizes, frequency of operation,
186 slot numbers is all considered platform-related information and is not provided
189 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
191 @param[in] ProcessorNumber The handle number of processor.
192 @param[out] ProcessorInfoBuffer A pointer to the buffer where information for
193 the requested processor is deposited.
195 @retval EFI_SUCCESS Processor information was returned.
196 @retval EFI_DEVICE_ERROR The calling processor is an AP.
197 @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
198 @retval EFI_NOT_FOUND The processor with the handle specified by
199 ProcessorNumber does not exist in the platform.
204 CpuMpServicesGetProcessorInfo (
205 IN EFI_MP_SERVICES_PROTOCOL
*This
,
206 IN UINTN ProcessorNumber
,
207 OUT EFI_PROCESSOR_INFORMATION
*ProcessorInfoBuffer
210 if (ProcessorInfoBuffer
== NULL
) {
211 return EFI_INVALID_PARAMETER
;
215 return EFI_DEVICE_ERROR
;
218 if (ProcessorNumber
>= gMPSystem
.NumberOfProcessors
) {
219 return EFI_NOT_FOUND
;
222 CopyMem (ProcessorInfoBuffer
, &gMPSystem
.ProcessorData
[ProcessorNumber
], sizeof (EFI_PROCESSOR_INFORMATION
));
228 This service executes a caller provided function on all enabled APs. APs can
229 run either simultaneously or one at a time in sequence. This service supports
230 both blocking and non-blocking requests. The non-blocking requests use EFI
231 events so the BSP can detect when the APs have finished. This service may only
232 be called from the BSP.
234 This function is used to dispatch all the enabled APs to the function specified
235 by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
236 immediately and Procedure is not started on any AP.
238 If SingleThread is TRUE, all the enabled APs execute the function specified by
239 Procedure one by one, in ascending order of processor handle number. Otherwise,
240 all the enabled APs execute the function specified by Procedure simultaneously.
242 If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all
243 APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking
244 mode, and the BSP returns from this service without waiting for APs. If a
245 non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
246 is signaled, then EFI_UNSUPPORTED must be returned.
248 If the timeout specified by TimeoutInMicroseconds expires before all APs return
249 from Procedure, then Procedure on the failed APs is terminated. All enabled APs
250 are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
251 and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its
252 content points to the list of processor handle numbers in which Procedure was
255 Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
256 to make sure that the nature of the code that is executed on the BSP and the
257 dispatched APs is well controlled. The MP Services Protocol does not guarantee
258 that the Procedure function is MP-safe. Hence, the tasks that can be run in
259 parallel are limited to certain independent tasks and well-controlled exclusive
260 code. EFI services and protocols may not be called by APs unless otherwise
263 In blocking execution mode, BSP waits until all APs finish or
264 TimeoutInMicroseconds expires.
266 In non-blocking execution mode, BSP is freed to return to the caller and then
267 proceed to the next task without having to wait for APs. The following
268 sequence needs to occur in a non-blocking execution mode:
270 -# The caller that intends to use this MP Services Protocol in non-blocking
271 mode creates WaitEvent by calling the EFI CreateEvent() service. The caller
272 invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent
273 is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests
274 the function specified by Procedure to be started on all the enabled APs,
275 and releases the BSP to continue with other tasks.
276 -# The caller can use the CheckEvent() and WaitForEvent() services to check
277 the state of the WaitEvent created in step 1.
278 -# When the APs complete their task or TimeoutInMicroSecondss expires, the MP
279 Service signals WaitEvent by calling the EFI SignalEvent() function. If
280 FailedCpuList is not NULL, its content is available when WaitEvent is
281 signaled. If all APs returned from Procedure prior to the timeout, then
282 FailedCpuList is set to NULL. If not all APs return from Procedure before
283 the timeout, then FailedCpuList is filled in with the list of the failed
284 APs. The buffer is allocated by MP Service Protocol using AllocatePool().
285 It is the caller's responsibility to free the buffer with FreePool() service.
286 -# This invocation of SignalEvent() function informs the caller that invoked
287 EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed
288 the specified task or a timeout occurred. The contents of FailedCpuList
289 can be examined to determine which APs did not complete the specified task
290 prior to the timeout.
292 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
294 @param[in] Procedure A pointer to the function to be run on
295 enabled APs of the system. See type
297 @param[in] SingleThread If TRUE, then all the enabled APs execute
298 the function specified by Procedure one by
299 one, in ascending order of processor handle
300 number. If FALSE, then all the enabled APs
301 execute the function specified by Procedure
303 @param[in] WaitEvent The event created by the caller with CreateEvent()
304 service. If it is NULL, then execute in
305 blocking mode. BSP waits until all APs finish
306 or TimeoutInMicroseconds expires. If it's
307 not NULL, then execute in non-blocking mode.
308 BSP requests the function specified by
309 Procedure to be started on all the enabled
310 APs, and go on executing immediately. If
311 all return from Procedure, or TimeoutInMicroseconds
312 expires, this event is signaled. The BSP
313 can use the CheckEvent() or WaitForEvent()
314 services to check the state of event. Type
315 EFI_EVENT is defined in CreateEvent() in
316 the Unified Extensible Firmware Interface
318 @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for
319 APs to return from Procedure, either for
320 blocking or non-blocking mode. Zero means
321 infinity. If the timeout expires before
322 all APs return from Procedure, then Procedure
323 on the failed APs is terminated. All enabled
324 APs are available for next function assigned
325 by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
326 or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
327 If the timeout expires in blocking mode,
328 BSP returns EFI_TIMEOUT. If the timeout
329 expires in non-blocking mode, WaitEvent
330 is signaled with SignalEvent().
331 @param[in] ProcedureArgument The parameter passed into Procedure for
333 @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
334 if all APs finish successfully, then its
335 content is set to NULL. If not all APs
336 finish before timeout expires, then its
337 content is set to address of the buffer
338 holding handle numbers of the failed APs.
339 The buffer is allocated by MP Service Protocol,
340 and it's the caller's responsibility to
341 free the buffer with FreePool() service.
342 In blocking mode, it is ready for consumption
343 when the call returns. In non-blocking mode,
344 it is ready when WaitEvent is signaled. The
345 list of failed CPU is terminated by
348 @retval EFI_SUCCESS In blocking mode, all APs have finished before
350 @retval EFI_SUCCESS In non-blocking mode, function has been dispatched
352 @retval EFI_UNSUPPORTED A non-blocking mode request was made after the
353 UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
355 @retval EFI_DEVICE_ERROR Caller processor is AP.
356 @retval EFI_NOT_STARTED No enabled APs exist in the system.
357 @retval EFI_NOT_READY Any enabled APs are busy.
358 @retval EFI_TIMEOUT In blocking mode, the timeout expired before
359 all enabled APs have finished.
360 @retval EFI_INVALID_PARAMETER Procedure is NULL.
365 CpuMpServicesStartupAllAps (
366 IN EFI_MP_SERVICES_PROTOCOL
*This
,
367 IN EFI_AP_PROCEDURE Procedure
,
368 IN BOOLEAN SingleThread
,
369 IN EFI_EVENT WaitEvent OPTIONAL
,
370 IN UINTN TimeoutInMicroseconds
,
371 IN VOID
*ProcedureArgument OPTIONAL
,
372 OUT UINTN
**FailedCpuList OPTIONAL
376 PROCESSOR_DATA_BLOCK
*ProcessorData
;
378 UINTN FailedListIndex
;
382 PROCESSOR_STATE APInitialState
;
383 PROCESSOR_STATE ProcessorState
;
388 return EFI_DEVICE_ERROR
;
391 if (gMPSystem
.NumberOfProcessors
== 1) {
392 return EFI_NOT_STARTED
;
395 if (Procedure
== NULL
) {
396 return EFI_INVALID_PARAMETER
;
399 if ((WaitEvent
!= NULL
) && gReadToBoot
) {
400 return EFI_UNSUPPORTED
;
404 if (FailedCpuList
!= NULL
) {
405 gMPSystem
.FailedList
= AllocatePool ((gMPSystem
.NumberOfProcessors
+ 1) * sizeof (UINTN
));
406 if (gMPSystem
.FailedList
== NULL
) {
407 return EFI_OUT_OF_RESOURCES
;
409 SetMemN (gMPSystem
.FailedList
, (gMPSystem
.NumberOfProcessors
+ 1) * sizeof (UINTN
), END_OF_CPU_LIST
);
410 gMPSystem
.FailedListIndex
= 0;
411 *FailedCpuList
= gMPSystem
.FailedList
;
414 Timeout
= TimeoutInMicroseconds
;
417 ProcessorData
= NULL
;
419 gMPSystem
.FinishCount
= 0;
420 gMPSystem
.StartCount
= 0;
421 gMPSystem
.SingleThread
= SingleThread
;
422 APInitialState
= CPU_STATE_READY
;
424 for (Number
= 0; Number
< gMPSystem
.NumberOfProcessors
; Number
++) {
425 ProcessorData
= &gMPSystem
.ProcessorData
[Number
];
427 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
432 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
433 // Skip Disabled processors
434 gMPSystem
.FailedList
[gMPSystem
.FailedListIndex
++] = Number
;
439 // Get APs prepared, and put failing APs into FailedCpuList
440 // if "SingleThread", only 1 AP will put to ready state, other AP will be put to ready
441 // state 1 by 1, until the previous 1 finished its task
442 // if not "SingleThread", all APs are put to ready state from the beginning
444 if (ProcessorData
->State
== CPU_STATE_IDLE
) {
445 gMPSystem
.StartCount
++;
447 gThread
->MutexLock (&ProcessorData
->StateLock
);
448 ProcessorData
->State
= APInitialState
;
449 gThread
->MutexUnlock (&ProcessorData
->StateLock
);
452 APInitialState
= CPU_STATE_BLOCKED
;
455 return EFI_NOT_READY
;
459 if (WaitEvent
!= NULL
) {
460 for (Number
= 0; Number
< gMPSystem
.NumberOfProcessors
; Number
++) {
461 ProcessorData
= &gMPSystem
.ProcessorData
[Number
];
462 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
467 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
468 // Skip Disabled processors
472 SetApProcedure (ProcessorData
, Procedure
, ProcedureArgument
);
476 // Save data into private data structure, and create timer to poll AP state before exiting
478 gMPSystem
.Procedure
= Procedure
;
479 gMPSystem
.ProcedureArgument
= ProcedureArgument
;
480 gMPSystem
.WaitEvent
= WaitEvent
;
481 gMPSystem
.Timeout
= TimeoutInMicroseconds
;
482 gMPSystem
.TimeoutActive
= (BOOLEAN
)(TimeoutInMicroseconds
!= 0);
483 Status
= gBS
->SetTimer (
484 gMPSystem
.CheckAllAPsEvent
,
493 for (Number
= 0; Number
< gMPSystem
.NumberOfProcessors
; Number
++) {
494 ProcessorData
= &gMPSystem
.ProcessorData
[Number
];
495 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
500 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
501 // Skip Disabled processors
505 gThread
->MutexLock (ProcessorData
->StateLock
);
506 ProcessorState
= ProcessorData
->State
;
507 gThread
->MutexUnlock (ProcessorData
->StateLock
);
509 switch (ProcessorState
) {
510 case CPU_STATE_READY
:
511 SetApProcedure (ProcessorData
, Procedure
, ProcedureArgument
);
514 case CPU_STATE_FINISHED
:
515 gMPSystem
.FinishCount
++;
517 Status
= GetNextBlockedNumber (&NextNumber
);
518 if (!EFI_ERROR (Status
)) {
519 gMPSystem
.ProcessorData
[NextNumber
].State
= CPU_STATE_READY
;
523 ProcessorData
->State
= CPU_STATE_IDLE
;
531 if (gMPSystem
.FinishCount
== gMPSystem
.StartCount
) {
532 Status
= EFI_SUCCESS
;
536 if ((TimeoutInMicroseconds
!= 0) && (Timeout
< 0)) {
537 Status
= EFI_TIMEOUT
;
541 gBS
->Stall (gPollInterval
);
542 Timeout
-= gPollInterval
;
546 if (FailedCpuList
!= NULL
) {
547 if (gMPSystem
.FailedListIndex
== 0) {
548 FreePool (*FailedCpuList
);
549 *FailedCpuList
= NULL
;
558 This service lets the caller get one enabled AP to execute a caller-provided
559 function. The caller can request the BSP to either wait for the completion
560 of the AP or just proceed with the next task by using the EFI event mechanism.
561 See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking
562 execution support. This service may only be called from the BSP.
564 This function is used to dispatch one enabled AP to the function specified by
565 Procedure passing in the argument specified by ProcedureArgument. If WaitEvent
566 is NULL, execution is in blocking mode. The BSP waits until the AP finishes or
567 TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.
568 BSP proceeds to the next task without waiting for the AP. If a non-blocking mode
569 is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,
570 then EFI_UNSUPPORTED must be returned.
572 If the timeout specified by TimeoutInMicroseconds expires before the AP returns
573 from Procedure, then execution of Procedure by the AP is terminated. The AP is
574 available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and
575 EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
577 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
579 @param[in] Procedure A pointer to the function to be run on
580 enabled APs of the system. See type
582 @param[in] ProcessorNumber The handle number of the AP. The range is
583 from 0 to the total number of logical
584 processors minus 1. The total number of
585 logical processors can be retrieved by
586 EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
587 @param[in] WaitEvent The event created by the caller with CreateEvent()
588 service. If it is NULL, then execute in
589 blocking mode. BSP waits until all APs finish
590 or TimeoutInMicroseconds expires. If it's
591 not NULL, then execute in non-blocking mode.
592 BSP requests the function specified by
593 Procedure to be started on all the enabled
594 APs, and go on executing immediately. If
595 all return from Procedure or TimeoutInMicroseconds
596 expires, this event is signaled. The BSP
597 can use the CheckEvent() or WaitForEvent()
598 services to check the state of event. Type
599 EFI_EVENT is defined in CreateEvent() in
600 the Unified Extensible Firmware Interface
602 @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for
603 APs to return from Procedure, either for
604 blocking or non-blocking mode. Zero means
605 infinity. If the timeout expires before
606 all APs return from Procedure, then Procedure
607 on the failed APs is terminated. All enabled
608 APs are available for next function assigned
609 by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
610 or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
611 If the timeout expires in blocking mode,
612 BSP returns EFI_TIMEOUT. If the timeout
613 expires in non-blocking mode, WaitEvent
614 is signaled with SignalEvent().
615 @param[in] ProcedureArgument The parameter passed into Procedure for
617 @param[out] Finished If NULL, this parameter is ignored. In
618 blocking mode, this parameter is ignored.
619 In non-blocking mode, if AP returns from
620 Procedure before the timeout expires, its
621 content is set to TRUE. Otherwise, the
622 value is set to FALSE. The caller can
623 determine if the AP returned from Procedure
624 by evaluating this value.
626 @retval EFI_SUCCESS In blocking mode, specified AP finished before
628 @retval EFI_SUCCESS In non-blocking mode, the function has been
629 dispatched to specified AP.
630 @retval EFI_UNSUPPORTED A non-blocking mode request was made after the
631 UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
633 @retval EFI_DEVICE_ERROR The calling processor is an AP.
634 @retval EFI_TIMEOUT In blocking mode, the timeout expired before
635 the specified AP has finished.
636 @retval EFI_NOT_READY The specified AP is busy.
637 @retval EFI_NOT_FOUND The processor with the handle specified by
638 ProcessorNumber does not exist.
639 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
640 @retval EFI_INVALID_PARAMETER Procedure is NULL.
645 CpuMpServicesStartupThisAP (
646 IN EFI_MP_SERVICES_PROTOCOL
*This
,
647 IN EFI_AP_PROCEDURE Procedure
,
648 IN UINTN ProcessorNumber
,
649 IN EFI_EVENT WaitEvent OPTIONAL
,
650 IN UINTN TimeoutInMicroseconds
,
651 IN VOID
*ProcedureArgument OPTIONAL
,
652 OUT BOOLEAN
*Finished OPTIONAL
659 return EFI_DEVICE_ERROR
;
662 if (Procedure
== NULL
) {
663 return EFI_INVALID_PARAMETER
;
666 if (ProcessorNumber
>= gMPSystem
.NumberOfProcessors
) {
667 return EFI_NOT_FOUND
;
670 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0) {
671 return EFI_INVALID_PARAMETER
;
674 if (gMPSystem
.ProcessorData
[ProcessorNumber
].State
!= CPU_STATE_IDLE
) {
675 return EFI_NOT_READY
;
678 if ((WaitEvent
!= NULL
) && gReadToBoot
) {
679 return EFI_UNSUPPORTED
;
682 Timeout
= TimeoutInMicroseconds
;
684 gMPSystem
.StartCount
= 1;
685 gMPSystem
.FinishCount
= 0;
687 SetApProcedure (&gMPSystem
.ProcessorData
[ProcessorNumber
], Procedure
, ProcedureArgument
);
689 if (WaitEvent
!= NULL
) {
691 gMPSystem
.WaitEvent
= WaitEvent
;
692 Status
= gBS
->SetTimer (
693 gMPSystem
.ProcessorData
[ProcessorNumber
].CheckThisAPEvent
,
702 gThread
->MutexLock (&gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
703 if (gMPSystem
.ProcessorData
[ProcessorNumber
].State
== CPU_STATE_FINISHED
) {
704 gMPSystem
.ProcessorData
[ProcessorNumber
].State
= CPU_STATE_IDLE
;
705 gThread
->MutexUnlock (&gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
709 gThread
->MutexUnlock (&gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
711 if ((TimeoutInMicroseconds
!= 0) && (Timeout
< 0)) {
715 gBS
->Stall (gPollInterval
);
716 Timeout
-= gPollInterval
;
725 This service switches the requested AP to be the BSP from that point onward.
726 This service changes the BSP for all purposes. This call can only be performed
729 This service switches the requested AP to be the BSP from that point onward.
730 This service changes the BSP for all purposes. The new BSP can take over the
731 execution of the old BSP and continue seamlessly from where the old one left
732 off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
735 If the BSP cannot be switched prior to the return from this service, then
736 EFI_UNSUPPORTED must be returned.
738 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
739 @param[in] ProcessorNumber The handle number of AP that is to become the new
740 BSP. The range is from 0 to the total number of
741 logical processors minus 1. The total number of
742 logical processors can be retrieved by
743 EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
744 @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
745 enabled AP. Otherwise, it will be disabled.
747 @retval EFI_SUCCESS BSP successfully switched.
748 @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
749 this service returning.
750 @retval EFI_UNSUPPORTED Switching the BSP is not supported.
751 @retval EFI_SUCCESS The calling processor is an AP.
752 @retval EFI_NOT_FOUND The processor with the handle specified by
753 ProcessorNumber does not exist.
754 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
756 @retval EFI_NOT_READY The specified AP is busy.
761 CpuMpServicesSwitchBSP (
762 IN EFI_MP_SERVICES_PROTOCOL
*This
,
763 IN UINTN ProcessorNumber
,
764 IN BOOLEAN EnableOldBSP
770 return EFI_DEVICE_ERROR
;
773 if (ProcessorNumber
>= gMPSystem
.NumberOfProcessors
) {
774 return EFI_NOT_FOUND
;
777 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
778 return EFI_INVALID_PARAMETER
;
781 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0) {
782 return EFI_INVALID_PARAMETER
;
785 for (Index
= 0; Index
< gMPSystem
.NumberOfProcessors
; Index
++) {
786 if ((gMPSystem
.ProcessorData
[Index
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0) {
790 ASSERT (Index
!= gMPSystem
.NumberOfProcessors
);
792 if (gMPSystem
.ProcessorData
[ProcessorNumber
].State
!= CPU_STATE_IDLE
) {
793 return EFI_NOT_READY
;
796 // Skip for now as we need switch a bunch of stack stuff around and it's complex
797 // May not be worth it?
798 return EFI_NOT_READY
;
803 This service lets the caller enable or disable an AP from this point onward.
804 This service may only be called from the BSP.
806 This service allows the caller enable or disable an AP from this point onward.
807 The caller can optionally specify the health status of the AP by Health. If
808 an AP is being disabled, then the state of the disabled AP is implementation
809 dependent. If an AP is enabled, then the implementation must guarantee that a
810 complete initialization sequence is performed on the AP, so the AP is in a state
811 that is compatible with an MP operating system. This service may not be supported
812 after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.
814 If the enable or disable AP operation cannot be completed prior to the return
815 from this service, then EFI_UNSUPPORTED must be returned.
817 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
818 @param[in] ProcessorNumber The handle number of AP that is to become the new
819 BSP. The range is from 0 to the total number of
820 logical processors minus 1. The total number of
821 logical processors can be retrieved by
822 EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
823 @param[in] EnableAP Specifies the new state for the processor for
824 enabled, FALSE for disabled.
825 @param[in] HealthFlag If not NULL, a pointer to a value that specifies
826 the new health status of the AP. This flag
827 corresponds to StatusFlag defined in
828 EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
829 the PROCESSOR_HEALTH_STATUS_BIT is used. All other
830 bits are ignored. If it is NULL, this parameter
833 @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
834 @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
835 prior to this service returning.
836 @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
837 @retval EFI_DEVICE_ERROR The calling processor is an AP.
838 @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
840 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
845 CpuMpServicesEnableDisableAP (
846 IN EFI_MP_SERVICES_PROTOCOL
*This
,
847 IN UINTN ProcessorNumber
,
849 IN UINT32
*HealthFlag OPTIONAL
853 return EFI_DEVICE_ERROR
;
856 if (ProcessorNumber
>= gMPSystem
.NumberOfProcessors
) {
857 return EFI_NOT_FOUND
;
860 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) != 0) {
861 return EFI_INVALID_PARAMETER
;
864 if (gMPSystem
.ProcessorData
[ProcessorNumber
].State
!= CPU_STATE_IDLE
) {
865 return EFI_UNSUPPORTED
;
868 gThread
->MutexLock (&gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
871 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0 ) {
872 gMPSystem
.NumberOfEnabledProcessors
++;
874 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
|= PROCESSOR_ENABLED_BIT
;
876 if ((gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == PROCESSOR_ENABLED_BIT
) {
877 gMPSystem
.NumberOfEnabledProcessors
--;
879 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
&= ~PROCESSOR_ENABLED_BIT
;
882 if (HealthFlag
!= NULL
) {
883 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
&= ~PROCESSOR_HEALTH_STATUS_BIT
;
884 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
|= (*HealthFlag
& PROCESSOR_HEALTH_STATUS_BIT
);
887 gThread
->MutexUnlock (&gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
894 This return the handle number for the calling processor. This service may be
895 called from the BSP and APs.
897 This service returns the processor handle number for the calling processor.
898 The returned value is in the range from 0 to the total number of logical
899 processors minus 1. The total number of logical processors can be retrieved
900 with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
901 called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
902 is returned. Otherwise, the current processors handle number is returned in
903 ProcessorNumber, and EFI_SUCCESS is returned.
905 @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
906 @param[in] ProcessorNumber The handle number of AP that is to become the new
907 BSP. The range is from 0 to the total number of
908 logical processors minus 1. The total number of
909 logical processors can be retrieved by
910 EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
912 @retval EFI_SUCCESS The current processor handle number was returned
914 @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
919 CpuMpServicesWhoAmI (
920 IN EFI_MP_SERVICES_PROTOCOL
*This
,
921 OUT UINTN
*ProcessorNumber
927 if (ProcessorNumber
== NULL
) {
928 return EFI_INVALID_PARAMETER
;
931 ProcessorId
= gThread
->Self ();
932 for (Index
= 0; Index
< gMPSystem
.NumberOfProcessors
; Index
++) {
933 if (gMPSystem
.ProcessorData
[Index
].Info
.ProcessorId
== ProcessorId
) {
938 *ProcessorNumber
= Index
;
944 EFI_MP_SERVICES_PROTOCOL mMpSercicesTemplate
= {
945 CpuMpServicesGetNumberOfProcessors
,
946 CpuMpServicesGetProcessorInfo
,
947 CpuMpServicesStartupAllAps
,
948 CpuMpServicesStartupThisAP
,
949 CpuMpServicesSwitchBSP
,
950 CpuMpServicesEnableDisableAP
,
957 If timeout occurs in StartupAllAps(), a timer is set, which invokes this
958 procedure periodically to check whether all APs have finished.
964 CpuCheckAllAPsStatus (
969 UINTN ProcessorNumber
;
971 PROCESSOR_DATA_BLOCK
*ProcessorData
;
972 PROCESSOR_DATA_BLOCK
*NextData
;
974 PROCESSOR_STATE ProcessorState
;
978 if (gMPSystem
.TimeoutActive
) {
979 gMPSystem
.Timeout
-= gPollInterval
;
982 ProcessorData
= (PROCESSOR_DATA_BLOCK
*) Context
;
984 for (ProcessorNumber
= 0; ProcessorNumber
< gMPSystem
.NumberOfProcessors
; ProcessorNumber
++) {
985 if ((ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
990 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
991 // Skip Disabled processors
995 // This is an Interrupt Service routine.
996 // This can grab a lock that is held in a non-interrupt
997 // context. Meaning deadlock. Which is a bad thing.
998 // So, try lock it. If we can get it, cool, do our thing.
999 // otherwise, just dump out & try again on the next iteration.
1000 Status
= gThread
->MutexTryLock (gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
1001 if (EFI_ERROR(Status
)) {
1004 ProcessorState
= gMPSystem
.ProcessorData
[ProcessorNumber
].State
;
1005 gThread
->MutexUnlock (gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
1007 switch (ProcessorState
) {
1008 case CPU_STATE_READY
:
1009 SetApProcedure (ProcessorData
, gMPSystem
.Procedure
, gMPSystem
.ProcedureArgument
);
1012 case CPU_STATE_FINISHED
:
1013 if (gMPSystem
.SingleThread
) {
1014 Status
= GetNextBlockedNumber (&NextNumber
);
1015 if (!EFI_ERROR (Status
)) {
1016 NextData
= &gMPSystem
.ProcessorData
[NextNumber
];
1018 gThread
->MutexLock (&NextData
->ProcedureLock
);
1019 NextData
->State
= CPU_STATE_READY
;
1020 gThread
->MutexUnlock (&NextData
->ProcedureLock
);
1022 SetApProcedure (NextData
, gMPSystem
.Procedure
, gMPSystem
.ProcedureArgument
);
1026 gMPSystem
.ProcessorData
[ProcessorNumber
].State
= CPU_STATE_IDLE
;
1027 gMPSystem
.FinishCount
++;
1035 if (gMPSystem
.TimeoutActive
&& gMPSystem
.Timeout
< 0) {
1039 if (gMPSystem
.FailedList
!= NULL
) {
1040 for (ProcessorNumber
= 0; ProcessorNumber
< gMPSystem
.NumberOfProcessors
; ProcessorNumber
++) {
1041 if ((ProcessorData
[ProcessorNumber
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
1046 if ((ProcessorData
->Info
.StatusFlag
& PROCESSOR_ENABLED_BIT
) == 0) {
1047 // Skip Disabled processors
1052 Status
= gThread
->MutexTryLock (gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
1053 if (EFI_ERROR(Status
)) {
1056 ProcessorState
= gMPSystem
.ProcessorData
[ProcessorNumber
].State
;
1057 gThread
->MutexUnlock (gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
);
1059 if (ProcessorState
!= CPU_STATE_IDLE
) {
1060 // If we are retrying make sure we don't double count
1061 for (Cpu
= 0, Found
= FALSE
; Cpu
< gMPSystem
.NumberOfProcessors
; Cpu
++) {
1062 if (gMPSystem
.FailedList
[Cpu
] == END_OF_CPU_LIST
) {
1065 if (gMPSystem
.FailedList
[ProcessorNumber
] == Cpu
) {
1071 gMPSystem
.FailedList
[gMPSystem
.FailedListIndex
++] = Cpu
;
1076 // Force terminal exit
1077 gMPSystem
.FinishCount
= gMPSystem
.StartCount
;
1080 if (gMPSystem
.FinishCount
!= gMPSystem
.StartCount
) {
1085 gMPSystem
.CheckAllAPsEvent
,
1090 if (gMPSystem
.FailedListIndex
== 0) {
1091 if (gMPSystem
.FailedList
!= NULL
) {
1092 FreePool (gMPSystem
.FailedList
);
1093 gMPSystem
.FailedList
= NULL
;
1097 Status
= gBS
->SignalEvent (gMPSystem
.WaitEvent
);
1104 CpuCheckThisAPStatus (
1110 PROCESSOR_DATA_BLOCK
*ProcessorData
;
1111 PROCESSOR_STATE ProcessorState
;
1113 ProcessorData
= (PROCESSOR_DATA_BLOCK
*) Context
;
1116 // This is an Interrupt Service routine.
1117 // that can grab a lock that is held in a non-interrupt
1118 // context. Meaning deadlock. Which is a badddd thing.
1119 // So, try lock it. If we can get it, cool, do our thing.
1120 // otherwise, just dump out & try again on the next iteration.
1122 Status
= gThread
->MutexTryLock (ProcessorData
->StateLock
);
1123 if (EFI_ERROR(Status
)) {
1126 ProcessorState
= ProcessorData
->State
;
1127 gThread
->MutexUnlock (ProcessorData
->StateLock
);
1129 if (ProcessorState
== CPU_STATE_FINISHED
) {
1130 Status
= gBS
->SetTimer (ProcessorData
->CheckThisAPEvent
, TimerCancel
, 0);
1131 ASSERT_EFI_ERROR (Status
);
1133 Status
= gBS
->SignalEvent (gMPSystem
.WaitEvent
);
1134 ASSERT_EFI_ERROR (Status
);
1136 gThread
->MutexLock (ProcessorData
->StateLock
);
1137 ProcessorData
->State
= CPU_STATE_IDLE
;
1138 gThread
->MutexUnlock (ProcessorData
->StateLock
);
1146 This function is called by all processors (both BSP and AP) once and collects MP related data
1148 MPSystemData - Pointer to the data structure containing MP related data
1149 BSP - TRUE if the CPU is BSP
1151 EFI_SUCCESS - Data for the processor collected and filled in
1155 FillInProcessorInformation (
1157 IN UINTN ProcessorNumber
1160 PROCESSOR_DATA_BLOCK
*ProcessorData
;
1162 ProcessorData
= &gMPSystem
.ProcessorData
[ProcessorNumber
];
1164 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.ProcessorId
= gThread
->Self ();
1165 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
= PROCESSOR_ENABLED_BIT
| PROCESSOR_HEALTH_STATUS_BIT
;
1167 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.StatusFlag
|= PROCESSOR_AS_BSP_BIT
;
1170 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.Location
.Package
= ProcessorNumber
;
1171 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.Location
.Core
= 0;
1172 gMPSystem
.ProcessorData
[ProcessorNumber
].Info
.Location
.Thread
= 0;
1173 gMPSystem
.ProcessorData
[ProcessorNumber
].State
= BSP
? CPU_STATE_BUSY
: CPU_STATE_IDLE
;
1175 gMPSystem
.ProcessorData
[ProcessorNumber
].Procedure
= NULL
;
1176 gMPSystem
.ProcessorData
[ProcessorNumber
].Parameter
= NULL
;
1177 gMPSystem
.ProcessorData
[ProcessorNumber
].StateLock
= gThread
->MutexInit ();
1178 gMPSystem
.ProcessorData
[ProcessorNumber
].ProcedureLock
= gThread
->MutexInit ();
1185 CpuDriverApIdolLoop (
1189 EFI_AP_PROCEDURE Procedure
;
1191 UINTN ProcessorNumber
;
1192 PROCESSOR_DATA_BLOCK
*ProcessorData
;
1194 ProcessorNumber
= (UINTN
)Context
;
1195 ProcessorData
= &gMPSystem
.ProcessorData
[ProcessorNumber
];
1197 ProcessorData
->Info
.ProcessorId
= gThread
->Self ();
1201 // Make a local copy on the stack to be extra safe
1203 gThread
->MutexLock (ProcessorData
->ProcedureLock
);
1204 Procedure
= ProcessorData
->Procedure
;
1205 Parameter
= ProcessorData
->Parameter
;
1206 gThread
->MutexUnlock (ProcessorData
->ProcedureLock
);
1208 if (Procedure
!= NULL
) {
1209 gThread
->MutexLock (ProcessorData
->StateLock
);
1210 ProcessorData
->State
= CPU_STATE_BUSY
;
1211 gThread
->MutexUnlock (ProcessorData
->StateLock
);
1213 Procedure (Parameter
);
1215 gThread
->MutexLock (ProcessorData
->ProcedureLock
);
1216 ProcessorData
->Procedure
= NULL
;
1217 gThread
->MutexUnlock (ProcessorData
->ProcedureLock
);
1219 gThread
->MutexLock (ProcessorData
->StateLock
);
1220 ProcessorData
->State
= CPU_STATE_FINISHED
;
1221 gThread
->MutexUnlock (ProcessorData
->StateLock
);
1224 // Poll 5 times a seconds, 200ms
1225 // Don't want to burn too many system resources doing nothing.
1226 gEmuThunk
->Sleep (200);
1234 InitializeMpSystemData (
1235 IN UINTN NumberOfProcessors
1243 // Clear the data structure area first.
1245 ZeroMem (&gMPSystem
, sizeof (MP_SYSTEM_DATA
));
1248 // First BSP fills and inits all known values, including it's own records.
1250 gMPSystem
.NumberOfProcessors
= NumberOfProcessors
;
1251 gMPSystem
.NumberOfEnabledProcessors
= NumberOfProcessors
;
1253 gMPSystem
.ProcessorData
= AllocateZeroPool (gMPSystem
.NumberOfProcessors
* sizeof (PROCESSOR_DATA_BLOCK
));
1254 ASSERT (gMPSystem
.ProcessorData
!= NULL
);
1256 FillInProcessorInformation (TRUE
, 0);
1258 Status
= gBS
->CreateEvent (
1259 EVT_TIMER
| EVT_NOTIFY_SIGNAL
,
1261 CpuCheckAllAPsStatus
,
1263 &gMPSystem
.CheckAllAPsEvent
1265 ASSERT_EFI_ERROR (Status
);
1268 for (Index
= 0; Index
< gMPSystem
.NumberOfProcessors
; Index
++) {
1269 if ((gMPSystem
.ProcessorData
[Index
].Info
.StatusFlag
& PROCESSOR_AS_BSP_BIT
) == PROCESSOR_AS_BSP_BIT
) {
1274 FillInProcessorInformation (FALSE
, Index
);
1276 Status
= gThread
->CreateThread (
1277 (VOID
*)&gMPSystem
.ProcessorData
[Index
].Info
.ProcessorId
,
1279 CpuDriverApIdolLoop
,
1284 Status
= gBS
->CreateEvent (
1285 EVT_TIMER
| EVT_NOTIFY_SIGNAL
,
1287 CpuCheckThisAPStatus
,
1288 (VOID
*) &gMPSystem
.ProcessorData
[Index
],
1289 &gMPSystem
.ProcessorData
[Index
].CheckThisAPEvent
1299 Invoke a notification event
1301 @param Event Event whose notification function is being invoked.
1302 @param Context The pointer to the notification function's context,
1303 which is implementation-dependent.
1308 CpuReadToBootFunction (
1325 EMU_IO_THUNK_PROTOCOL
*IoThunk
;
1330 IoThunk
= GetIoThunkInstance (&gEmuThreadThunkProtocolGuid
, 0);
1331 if (IoThunk
!= NULL
) {
1332 Status
= IoThunk
->Open (IoThunk
);
1333 if (!EFI_ERROR (Status
)) {
1334 if (IoThunk
->ConfigString
!= NULL
) {
1335 MaxCpus
+= StrDecimalToUintn (IoThunk
->ConfigString
);
1336 gThread
= IoThunk
->Interface
;
1342 // We are not MP so nothing to do
1346 gPollInterval
= PcdGet64 (PcdEmuMpServicesPollingInterval
);
1348 Status
= InitializeMpSystemData (MaxCpus
);
1349 if (EFI_ERROR (Status
)) {
1353 Status
= EfiCreateEventReadyToBootEx (TPL_CALLBACK
, CpuReadToBootFunction
, NULL
, &gReadToBootEvent
);
1354 ASSERT_EFI_ERROR (Status
);
1357 // Now install the MP services protocol.
1360 Status
= gBS
->InstallMultipleProtocolInterfaces (
1362 &gEfiMpServiceProtocolGuid
, &mMpSercicesTemplate
,