diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c new file mode 100644 index 00000000..df43c63d --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.c @@ -0,0 +1,276 @@ +/** @file + CPU Register Table Library functions. + + Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <PiDxe.h> + +#include <Library/UefiBootServicesTableLib.h> +#include <Library/UefiLib.h> + +#include "RegisterCpuFeatures.h" + +CPU_FEATURES_DATA mCpuFeaturesData = {0}; + +/** + Worker function to get CPU_FEATURES_DATA pointer. + + @return Pointer to CPU_FEATURES_DATA. +**/ +CPU_FEATURES_DATA * +GetCpuFeaturesData ( + VOID + ) +{ + return &mCpuFeaturesData; +} + +/** + Worker function to get EFI_MP_SERVICES_PROTOCOL pointer. + + @return MP_SERVICES variable. +**/ +MP_SERVICES +GetMpService ( + VOID + ) +{ + EFI_STATUS Status; + MP_SERVICES MpService; + + // + // Get MP Services Protocol + // + Status = gBS->LocateProtocol ( + &gEfiMpServiceProtocolGuid, + NULL, + (VOID **)&MpService.Protocol + ); + ASSERT_EFI_ERROR (Status); + + return MpService; +} + +/** + Worker function to return processor index. + + @param CpuFeaturesData Cpu Feature Data structure. + + @return The processor index. +**/ +UINTN +GetProcessorIndex ( + IN CPU_FEATURES_DATA *CpuFeaturesData + ) +{ + EFI_STATUS Status; + UINTN ProcessorIndex; + EFI_MP_SERVICES_PROTOCOL *MpServices; + + MpServices = CpuFeaturesData->MpService.Protocol; + Status = MpServices->WhoAmI(MpServices, &ProcessorIndex); + ASSERT_EFI_ERROR (Status); + return ProcessorIndex; +} + +/** + Gets detailed MP-related information on the requested processor at the + instant this call is made. + + @param[in] ProcessorNumber The handle number of processor. + @param[out] ProcessorInfoBuffer A pointer to the buffer where information for + the requested processor is deposited. + + @return Status of MpServices->GetProcessorInfo(). +**/ +EFI_STATUS +GetProcessorInformation ( + IN UINTN ProcessorNumber, + OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer + ) +{ + EFI_STATUS Status; + EFI_MP_SERVICES_PROTOCOL *MpServices; + CPU_FEATURES_DATA *CpuFeaturesData; + + CpuFeaturesData = GetCpuFeaturesData (); + MpServices = CpuFeaturesData->MpService.Protocol; + + Status = MpServices->GetProcessorInfo ( + MpServices, + ProcessorNumber, + ProcessorInfoBuffer + ); + return Status; +} + +/** + Worker function to execute a caller provided function on all enabled APs. + + @param[in] Procedure A pointer to the function to be run on + enabled APs of the system. + @param[in] MpEvent A pointer to the event to be used later + to check whether procedure has done. +**/ +VOID +StartupAllAPsWorker ( + IN EFI_AP_PROCEDURE Procedure, + IN EFI_EVENT MpEvent + ) +{ + EFI_STATUS Status; + EFI_MP_SERVICES_PROTOCOL *MpServices; + CPU_FEATURES_DATA *CpuFeaturesData; + + CpuFeaturesData = GetCpuFeaturesData (); + MpServices = CpuFeaturesData->MpService.Protocol; + + // + // Wakeup all APs + // + Status = MpServices->StartupAllAPs ( + MpServices, + Procedure, + FALSE, + MpEvent, + 0, + CpuFeaturesData, + NULL + ); + ASSERT_EFI_ERROR (Status); +} + +/** + Worker function to switch the requested AP to be the BSP from that point onward. + + @param[in] ProcessorNumber The handle number of AP that is to become the new BSP. +**/ +VOID +SwitchNewBsp ( + IN UINTN ProcessorNumber + ) +{ + EFI_STATUS Status; + EFI_MP_SERVICES_PROTOCOL *MpServices; + CPU_FEATURES_DATA *CpuFeaturesData; + + CpuFeaturesData = GetCpuFeaturesData (); + MpServices = CpuFeaturesData->MpService.Protocol; + + // + // Wakeup all APs + // + Status = MpServices->SwitchBSP ( + MpServices, + ProcessorNumber, + TRUE + ); + ASSERT_EFI_ERROR (Status); +} + +/** + Worker function to retrieve the number of logical processor in the platform. + + @param[out] NumberOfCpus Pointer to the total number of logical + processors in the system, including the BSP + and disabled APs. + @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical + processors that exist in system, including + the BSP. +**/ +VOID +GetNumberOfProcessor ( + OUT UINTN *NumberOfCpus, + OUT UINTN *NumberOfEnabledProcessors + ) +{ + EFI_STATUS Status; + EFI_MP_SERVICES_PROTOCOL *MpServices; + CPU_FEATURES_DATA *CpuFeaturesData; + + CpuFeaturesData = GetCpuFeaturesData (); + MpServices = CpuFeaturesData->MpService.Protocol; + + // + // Get the number of CPUs + // + Status = MpServices->GetNumberOfProcessors ( + MpServices, + NumberOfCpus, + NumberOfEnabledProcessors + ); + ASSERT_EFI_ERROR (Status); +} + +/** + Performs CPU features Initialization. + + This service will invoke MP service to perform CPU features + initialization on BSP/APs per user configuration. + + @note This service could be called by BSP only. +**/ +VOID +EFIAPI +CpuFeaturesInitialize ( + VOID + ) +{ + CPU_FEATURES_DATA *CpuFeaturesData; + UINTN OldBspNumber; + EFI_EVENT MpEvent; + EFI_STATUS Status; + + CpuFeaturesData = GetCpuFeaturesData (); + + OldBspNumber = GetProcessorIndex (CpuFeaturesData); + CpuFeaturesData->BspNumber = OldBspNumber; + + // + // + // Initialize MpEvent to suppress incorrect compiler/analyzer warnings. + // + MpEvent = NULL; + + if (CpuFeaturesData->NumberOfCpus > 1) { + Status = gBS->CreateEvent ( + EVT_NOTIFY_WAIT, + TPL_CALLBACK, + EfiEventEmptyFunction, + NULL, + &MpEvent + ); + ASSERT_EFI_ERROR (Status); + + // + // Wakeup all APs for programming. + // + StartupAllAPsWorker (SetProcessorRegister, MpEvent); + } + + // + // Programming BSP + // + SetProcessorRegister (CpuFeaturesData); + + if (CpuFeaturesData->NumberOfCpus > 1) { + // + // Wait all processors to finish the task. + // + do { + Status = gBS->CheckEvent (MpEvent); + } while (Status == EFI_NOT_READY); + ASSERT_EFI_ERROR (Status); + } + + // + // Switch to new BSP if required + // + if (CpuFeaturesData->BspNumber != OldBspNumber) { + SwitchNewBsp (CpuFeaturesData->BspNumber); + } +} + |