UefiCpuPkg/Library/MpInitLib/PeiMpLib.c

   1 /** @file
   2   MP initialize support functions for PEI phase.
   3
   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
   9
  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.
  12
  13 **/
  14
  15 #include "MpLib.h"
  16 #include <Library/PeiServicesLib.h>
  17 #include <Guid/S3SmmInitDone.h>
  18
  19 /**
  20   S3 SMM Init Done notification function.
  21
  22   @param  PeiServices      Indirect reference to the PEI Services Table.
  23   @param  NotifyDesc       Address of the notification descriptor data structure.
  24   @param  InvokePpi        Address of the PPI that was invoked.
  25
  26   @retval EFI_SUCCESS      The function completes successfully.
  27
  28 **/
  29 EFI_STATUS
  30 EFIAPI
  31 NotifyOnS3SmmInitDonePpi (
  32   IN  EFI_PEI_SERVICES                              **PeiServices,
  33   IN  EFI_PEI_NOTIFY_DESCRIPTOR                     *NotifyDesc,
  34   IN  VOID                                          *InvokePpi
  35   );
  36
  37
  38 //
  39 // Global function
  40 //
  41 EFI_PEI_NOTIFY_DESCRIPTOR        mS3SmmInitDoneNotifyDesc = {
  42   EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
  43   &gEdkiiS3SmmInitDoneGuid,
  44   NotifyOnS3SmmInitDonePpi
  45 };
  46
  47 /**
  48   S3 SMM Init Done notification function.
  49
  50   @param  PeiServices      Indirect reference to the PEI Services Table.
  51   @param  NotifyDesc       Address of the notification descriptor data structure.
  52   @param  InvokePpi        Address of the PPI that was invoked.
  53
  54   @retval EFI_SUCCESS      The function completes successfully.
  55
  56 **/
  57 EFI_STATUS
  58 EFIAPI
  59 NotifyOnS3SmmInitDonePpi (
  60   IN  EFI_PEI_SERVICES                              **PeiServices,
  61   IN  EFI_PEI_NOTIFY_DESCRIPTOR                     *NotifyDesc,
  62   IN  VOID                                          *InvokePpi
  63   )
  64 {
  65   CPU_MP_DATA     *CpuMpData;
  66
  67   CpuMpData = GetCpuMpData ();
  68
  69   //
  70   // PiSmmCpuDxeSmm driver hardcode change the loop mode to HLT mode.
  71   // So in this notify function, code need to check the current loop
  72   // mode, if it is not HLT mode, code need to change loop mode back
  73   // to the original mode.
  74   //
  75   if (CpuMpData->ApLoopMode != ApInHltLoop) {
  76     CpuMpData->WakeUpByInitSipiSipi = TRUE;
  77   }
  78
  79   return EFI_SUCCESS;
  80 }
  81
  82
  83 /**
  84   Enable Debug Agent to support source debugging on AP function.
  85
  86 **/
  87 VOID
  88 EnableDebugAgent (
  89   VOID
  90   )
  91 {
  92 }
  93
  94 /**
  95   Get pointer to CPU MP Data structure.
  96   For BSP, the pointer is retrieved from HOB.
  97   For AP, the structure is just after IDT.
  98
  99   @return  The pointer to CPU MP Data structure.
 100 **/
 101 CPU_MP_DATA *
 102 GetCpuMpData (
 103   VOID
 104   )
 105 {
 106   CPU_MP_DATA                  *CpuMpData;
 107   MSR_IA32_APIC_BASE_REGISTER  ApicBaseMsr;
 108   IA32_DESCRIPTOR              Idtr;
 109
 110   ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
 111   if (ApicBaseMsr.Bits.BSP == 1) {
 112     CpuMpData = GetCpuMpDataFromGuidedHob ();
 113     ASSERT (CpuMpData != NULL);
 114   } else {
 115     AsmReadIdtr (&Idtr);
 116     CpuMpData = (CPU_MP_DATA *) (Idtr.Base + Idtr.Limit + 1);
 117   }
 118   return CpuMpData;
 119 }
 120
 121 /**
 122   Save the pointer to CPU MP Data structure.
 123
 124   @param[in] CpuMpData  The pointer to CPU MP Data structure will be saved.
 125 **/
 126 VOID
 127 SaveCpuMpData (
 128   IN CPU_MP_DATA   *CpuMpData
 129   )
 130 {
 131   UINT64           Data64;
 132   //
 133   // Build location of CPU MP DATA buffer in HOB
 134   //
 135   Data64 = (UINT64) (UINTN) CpuMpData;
 136   BuildGuidDataHob (
 137     &mCpuInitMpLibHobGuid,
 138     (VOID *) &Data64,
 139     sizeof (UINT64)
 140     );
 141 }
 142
 143 /**
 144   Check if AP wakeup buffer is overlapped with existing allocated buffer.
 145
 146   @param[in]  WakeupBufferStart     AP wakeup buffer start address.
 147   @param[in]  WakeupBufferEnd       AP wakeup buffer end address.
 148
 149   @retval  TRUE       There is overlap.
 150   @retval  FALSE      There is no overlap.
 151 **/
 152 BOOLEAN
 153 CheckOverlapWithAllocatedBuffer (
 154   IN UINT64               WakeupBufferStart,
 155   IN UINT64               WakeupBufferEnd
 156   )
 157 {
 158   EFI_PEI_HOB_POINTERS      Hob;
 159   EFI_HOB_MEMORY_ALLOCATION *MemoryHob;
 160   BOOLEAN                   Overlapped;
 161   UINT64                    MemoryStart;
 162   UINT64                    MemoryEnd;
 163
 164   Overlapped = FALSE;
 165   //
 166   // Get the HOB list for processing
 167   //
 168   Hob.Raw = GetHobList ();
 169   //
 170   // Collect memory ranges
 171   //
 172   while (!END_OF_HOB_LIST (Hob)) {
 173     if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {
 174       MemoryHob   = Hob.MemoryAllocation;
 175       MemoryStart = MemoryHob->AllocDescriptor.MemoryBaseAddress;
 176       MemoryEnd   = MemoryHob->AllocDescriptor.MemoryBaseAddress + MemoryHob->AllocDescriptor.MemoryLength;
 177       if (!((WakeupBufferStart >= MemoryEnd) || (WakeupBufferEnd <= MemoryStart))) {
 178         Overlapped = TRUE;
 179         break;
 180       }
 181     }
 182     Hob.Raw = GET_NEXT_HOB (Hob);
 183   }
 184   return Overlapped;
 185 }
 186
 187 /**
 188   Get available system memory below 1MB by specified size.
 189
 190   @param[in] WakeupBufferSize   Wakeup buffer size required
 191
 192   @retval other   Return wakeup buffer address below 1MB.
 193   @retval -1      Cannot find free memory below 1MB.
 194 **/
 195 UINTN
 196 GetWakeupBuffer (
 197   IN UINTN                WakeupBufferSize
 198   )
 199 {
 200   EFI_PEI_HOB_POINTERS    Hob;
 201   UINT64                  WakeupBufferStart;
 202   UINT64                  WakeupBufferEnd;
 203
 204   WakeupBufferSize = (WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1);
 205
 206   //
 207   // Get the HOB list for processing
 208   //
 209   Hob.Raw = GetHobList ();
 210
 211   //
 212   // Collect memory ranges
 213   //
 214   while (!END_OF_HOB_LIST (Hob)) {
 215     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
 216       if ((Hob.ResourceDescriptor->PhysicalStart < BASE_1MB) &&
 217           (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
 218           ((Hob.ResourceDescriptor->ResourceAttribute &
 219             (EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED |
 220              EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED |
 221              EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED
 222              )) == 0)
 223            ) {
 224         //
 225         // Need memory under 1MB to be collected here
 226         //
 227         WakeupBufferEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
 228         if (WakeupBufferEnd > BASE_1MB) {
 229           //
 230           // Wakeup buffer should be under 1MB
 231           //
 232           WakeupBufferEnd = BASE_1MB;
 233         }
 234         while (WakeupBufferEnd > WakeupBufferSize) {
 235           //
 236           // Wakeup buffer should be aligned on 4KB
 237           //
 238           WakeupBufferStart = (WakeupBufferEnd - WakeupBufferSize) & ~(SIZE_4KB - 1);
 239           if (WakeupBufferStart < Hob.ResourceDescriptor->PhysicalStart) {
 240             break;
 241           }
 242           if (CheckOverlapWithAllocatedBuffer (WakeupBufferStart, WakeupBufferEnd)) {
 243             //
 244             // If this range is overlapped with existing allocated buffer, skip it
 245             // and find the next range
 246             //
 247             WakeupBufferEnd -= WakeupBufferSize;
 248             continue;
 249           }
 250           DEBUG ((DEBUG_INFO, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",
 251                                WakeupBufferStart, WakeupBufferSize));
 252           return (UINTN)WakeupBufferStart;
 253         }
 254       }
 255     }
 256     //
 257     // Find the next HOB
 258     //
 259     Hob.Raw = GET_NEXT_HOB (Hob);
 260   }
 261
 262   return (UINTN) -1;
 263 }
 264
 265 /**
 266   Get available EfiBootServicesCode memory below 4GB by specified size.
 267
 268   This buffer is required to safely transfer AP from real address mode to
 269   protected mode or long mode, due to the fact that the buffer returned by
 270   GetWakeupBuffer() may be marked as non-executable.
 271
 272   @param[in] BufferSize   Wakeup transition buffer size.
 273
 274   @retval other   Return wakeup transition buffer address below 4GB.
 275   @retval 0       Cannot find free memory below 4GB.
 276 **/
 277 UINTN
 278 GetModeTransitionBuffer (
 279   IN UINTN                BufferSize
 280   )
 281 {
 282   //
 283   // PEI phase doesn't need to do such transition. So simply return 0.
 284   //
 285   return 0;
 286 }
 287
 288 /**
 289   Checks APs status and updates APs status if needed.
 290
 291 **/
 292 VOID
 293 CheckAndUpdateApsStatus (
 294   VOID
 295   )
 296 {
 297 }
 298
 299 /**
 300   Initialize global data for MP support.
 301
 302   @param[in] CpuMpData  The pointer to CPU MP Data structure.
 303 **/
 304 VOID
 305 InitMpGlobalData (
 306   IN CPU_MP_DATA               *CpuMpData
 307   )
 308 {
 309   EFI_STATUS  Status;
 310
 311   SaveCpuMpData (CpuMpData);
 312
 313   ///
 314   /// Install Notify
 315   ///
 316   Status = PeiServicesNotifyPpi (&mS3SmmInitDoneNotifyDesc);
 317   ASSERT_EFI_ERROR (Status);
 318 }
 319
 320 /**
 321   This service executes a caller provided function on all enabled APs.
 322
 323   @param[in]  Procedure               A pointer to the function to be run on
 324                                       enabled APs of the system. See type
 325                                       EFI_AP_PROCEDURE.
 326   @param[in]  SingleThread            If TRUE, then all the enabled APs execute
 327                                       the function specified by Procedure one by
 328                                       one, in ascending order of processor handle
 329                                       number.  If FALSE, then all the enabled APs
 330                                       execute the function specified by Procedure
 331                                       simultaneously.
 332   @param[in]  WaitEvent               The event created by the caller with CreateEvent()
 333                                       service.  If it is NULL, then execute in
 334                                       blocking mode. BSP waits until all APs finish
 335                                       or TimeoutInMicroSeconds expires.  If it's
 336                                       not NULL, then execute in non-blocking mode.
 337                                       BSP requests the function specified by
 338                                       Procedure to be started on all the enabled
 339                                       APs, and go on executing immediately. If
 340                                       all return from Procedure, or TimeoutInMicroSeconds
 341                                       expires, this event is signaled. The BSP
 342                                       can use the CheckEvent() or WaitForEvent()
 343                                       services to check the state of event.  Type
 344                                       EFI_EVENT is defined in CreateEvent() in
 345                                       the Unified Extensible Firmware Interface
 346                                       Specification.
 347   @param[in]  TimeoutInMicroseconds   Indicates the time limit in microseconds for
 348                                       APs to return from Procedure, either for
 349                                       blocking or non-blocking mode. Zero means
 350                                       infinity.  If the timeout expires before
 351                                       all APs return from Procedure, then Procedure
 352                                       on the failed APs is terminated. All enabled
 353                                       APs are available for next function assigned
 354                                       by MpInitLibStartupAllAPs() or
 355                                       MPInitLibStartupThisAP().
 356                                       If the timeout expires in blocking mode,
 357                                       BSP returns EFI_TIMEOUT.  If the timeout
 358                                       expires in non-blocking mode, WaitEvent
 359                                       is signaled with SignalEvent().
 360   @param[in]  ProcedureArgument       The parameter passed into Procedure for
 361                                       all APs.
 362   @param[out] FailedCpuList           If NULL, this parameter is ignored. Otherwise,
 363                                       if all APs finish successfully, then its
 364                                       content is set to NULL. If not all APs
 365                                       finish before timeout expires, then its
 366                                       content is set to address of the buffer
 367                                       holding handle numbers of the failed APs.
 368                                       The buffer is allocated by MP Initialization
 369                                       library, and it's the caller's responsibility to
 370                                       free the buffer with FreePool() service.
 371                                       In blocking mode, it is ready for consumption
 372                                       when the call returns. In non-blocking mode,
 373                                       it is ready when WaitEvent is signaled.  The
 374                                       list of failed CPU is terminated by
 375                                       END_OF_CPU_LIST.
 376
 377   @retval EFI_SUCCESS             In blocking mode, all APs have finished before
 378                                   the timeout expired.
 379   @retval EFI_SUCCESS             In non-blocking mode, function has been dispatched
 380                                   to all enabled APs.
 381   @retval EFI_UNSUPPORTED         A non-blocking mode request was made after the
 382                                   UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
 383                                   signaled.
 384   @retval EFI_UNSUPPORTED         WaitEvent is not NULL if non-blocking mode is not
 385                                   supported.
 386   @retval EFI_DEVICE_ERROR        Caller processor is AP.
 387   @retval EFI_NOT_STARTED         No enabled APs exist in the system.
 388   @retval EFI_NOT_READY           Any enabled APs are busy.
 389   @retval EFI_NOT_READY           MP Initialize Library is not initialized.
 390   @retval EFI_TIMEOUT             In blocking mode, the timeout expired before
 391                                   all enabled APs have finished.
 392   @retval EFI_INVALID_PARAMETER   Procedure is NULL.
 393
 394 **/
 395 EFI_STATUS
 396 EFIAPI
 397 MpInitLibStartupAllAPs (
 398   IN  EFI_AP_PROCEDURE          Procedure,
 399   IN  BOOLEAN                   SingleThread,
 400   IN  EFI_EVENT                 WaitEvent               OPTIONAL,
 401   IN  UINTN                     TimeoutInMicroseconds,
 402   IN  VOID                      *ProcedureArgument      OPTIONAL,
 403   OUT UINTN                     **FailedCpuList         OPTIONAL
 404   )
 405 {
 406   if (WaitEvent != NULL) {
 407     return EFI_UNSUPPORTED;
 408   }
 409
 410   return StartupAllAPsWorker (
 411            Procedure,
 412            SingleThread,
 413            NULL,
 414            TimeoutInMicroseconds,
 415            ProcedureArgument,
 416            FailedCpuList
 417            );
 418 }
 419
 420 /**
 421   This service lets the caller get one enabled AP to execute a caller-provided
 422   function.
 423
 424   @param[in]  Procedure               A pointer to the function to be run on the
 425                                       designated AP of the system. See type
 426                                       EFI_AP_PROCEDURE.
 427   @param[in]  ProcessorNumber         The handle number of the AP. The range is
 428                                       from 0 to the total number of logical
 429                                       processors minus 1. The total number of
 430                                       logical processors can be retrieved by
 431                                       MpInitLibGetNumberOfProcessors().
 432   @param[in]  WaitEvent               The event created by the caller with CreateEvent()
 433                                       service.  If it is NULL, then execute in
 434                                       blocking mode. BSP waits until this AP finish
 435                                       or TimeoutInMicroSeconds expires.  If it's
 436                                       not NULL, then execute in non-blocking mode.
 437                                       BSP requests the function specified by
 438                                       Procedure to be started on this AP,
 439                                       and go on executing immediately. If this AP
 440                                       return from Procedure or TimeoutInMicroSeconds
 441                                       expires, this event is signaled. The BSP
 442                                       can use the CheckEvent() or WaitForEvent()
 443                                       services to check the state of event.  Type
 444                                       EFI_EVENT is defined in CreateEvent() in
 445                                       the Unified Extensible Firmware Interface
 446                                       Specification.
 447   @param[in]  TimeoutInMicroseconds   Indicates the time limit in microseconds for
 448                                       this AP to finish this Procedure, either for
 449                                       blocking or non-blocking mode. Zero means
 450                                       infinity.  If the timeout expires before
 451                                       this AP returns from Procedure, then Procedure
 452                                       on the AP is terminated. The
 453                                       AP is available for next function assigned
 454                                       by MpInitLibStartupAllAPs() or
 455                                       MpInitLibStartupThisAP().
 456                                       If the timeout expires in blocking mode,
 457                                       BSP returns EFI_TIMEOUT.  If the timeout
 458                                       expires in non-blocking mode, WaitEvent
 459                                       is signaled with SignalEvent().
 460   @param[in]  ProcedureArgument       The parameter passed into Procedure on the
 461                                       specified AP.
 462   @param[out] Finished                If NULL, this parameter is ignored.  In
 463                                       blocking mode, this parameter is ignored.
 464                                       In non-blocking mode, if AP returns from
 465                                       Procedure before the timeout expires, its
 466                                       content is set to TRUE. Otherwise, the
 467                                       value is set to FALSE. The caller can
 468                                       determine if the AP returned from Procedure
 469                                       by evaluating this value.
 470
 471   @retval EFI_SUCCESS             In blocking mode, specified AP finished before
 472                                   the timeout expires.
 473   @retval EFI_SUCCESS             In non-blocking mode, the function has been
 474                                   dispatched to specified AP.
 475   @retval EFI_UNSUPPORTED         A non-blocking mode request was made after the
 476                                   UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
 477                                   signaled.
 478   @retval EFI_UNSUPPORTED         WaitEvent is not NULL if non-blocking mode is not
 479                                   supported.
 480   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
 481   @retval EFI_TIMEOUT             In blocking mode, the timeout expired before
 482                                   the specified AP has finished.
 483   @retval EFI_NOT_READY           The specified AP is busy.
 484   @retval EFI_NOT_READY           MP Initialize Library is not initialized.
 485   @retval EFI_NOT_FOUND           The processor with the handle specified by
 486                                   ProcessorNumber does not exist.
 487   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the BSP or disabled AP.
 488   @retval EFI_INVALID_PARAMETER   Procedure is NULL.
 489
 490 **/
 491 EFI_STATUS
 492 EFIAPI
 493 MpInitLibStartupThisAP (
 494   IN  EFI_AP_PROCEDURE          Procedure,
 495   IN  UINTN                     ProcessorNumber,
 496   IN  EFI_EVENT                 WaitEvent               OPTIONAL,
 497   IN  UINTN                     TimeoutInMicroseconds,
 498   IN  VOID                      *ProcedureArgument      OPTIONAL,
 499   OUT BOOLEAN                   *Finished               OPTIONAL
 500   )
 501 {
 502   if (WaitEvent != NULL) {
 503     return EFI_UNSUPPORTED;
 504   }
 505
 506   return StartupThisAPWorker (
 507            Procedure,
 508            ProcessorNumber,
 509            NULL,
 510            TimeoutInMicroseconds,
 511            ProcedureArgument,
 512            Finished
 513            );
 514 }
 515
 516 /**
 517   This service switches the requested AP to be the BSP from that point onward.
 518   This service changes the BSP for all purposes. This call can only be performed
 519   by the current BSP.
 520
 521   @param[in] ProcessorNumber   The handle number of AP that is to become the new
 522                                BSP. The range is from 0 to the total number of
 523                                logical processors minus 1. The total number of
 524                                logical processors can be retrieved by
 525                                MpInitLibGetNumberOfProcessors().
 526   @param[in] EnableOldBSP      If TRUE, then the old BSP will be listed as an
 527                                enabled AP. Otherwise, it will be disabled.
 528
 529   @retval EFI_SUCCESS             BSP successfully switched.
 530   @retval EFI_UNSUPPORTED         Switching the BSP cannot be completed prior to
 531                                   this service returning.
 532   @retval EFI_UNSUPPORTED         Switching the BSP is not supported.
 533   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
 534   @retval EFI_NOT_FOUND           The processor with the handle specified by
 535                                   ProcessorNumber does not exist.
 536   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the current BSP or
 537                                   a disabled AP.
 538   @retval EFI_NOT_READY           The specified AP is busy.
 539   @retval EFI_NOT_READY           MP Initialize Library is not initialized.
 540
 541 **/
 542 EFI_STATUS
 543 EFIAPI
 544 MpInitLibSwitchBSP (
 545   IN UINTN                     ProcessorNumber,
 546   IN  BOOLEAN                  EnableOldBSP
 547   )
 548 {
 549   return SwitchBSPWorker (ProcessorNumber, EnableOldBSP);
 550 }
 551
 552 /**
 553   This service lets the caller enable or disable an AP from this point onward.
 554   This service may only be called from the BSP.
 555
 556   @param[in] ProcessorNumber   The handle number of AP.
 557                                The range is from 0 to the total number of
 558                                logical processors minus 1. The total number of
 559                                logical processors can be retrieved by
 560                                MpInitLibGetNumberOfProcessors().
 561   @param[in] EnableAP          Specifies the new state for the processor for
 562                                enabled, FALSE for disabled.
 563   @param[in] HealthFlag        If not NULL, a pointer to a value that specifies
 564                                the new health status of the AP. This flag
 565                                corresponds to StatusFlag defined in
 566                                EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
 567                                the PROCESSOR_HEALTH_STATUS_BIT is used. All other
 568                                bits are ignored.  If it is NULL, this parameter
 569                                is ignored.
 570
 571   @retval EFI_SUCCESS             The specified AP was enabled or disabled successfully.
 572   @retval EFI_UNSUPPORTED         Enabling or disabling an AP cannot be completed
 573                                   prior to this service returning.
 574   @retval EFI_UNSUPPORTED         Enabling or disabling an AP is not supported.
 575   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
 576   @retval EFI_NOT_FOUND           Processor with the handle specified by ProcessorNumber
 577                                   does not exist.
 578   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the BSP.
 579   @retval EFI_NOT_READY           MP Initialize Library is not initialized.
 580
 581 **/
 582 EFI_STATUS
 583 EFIAPI
 584 MpInitLibEnableDisableAP (
 585   IN  UINTN                     ProcessorNumber,
 586   IN  BOOLEAN                   EnableAP,
 587   IN  UINT32                    *HealthFlag OPTIONAL
 588   )
 589 {
 590   return EnableDisableApWorker (ProcessorNumber, EnableAP, HealthFlag);
 591 }
 592
 593