#include "PeiMpServices.h"
+//
+// CPU MP PPI to be installed
+//
+EFI_PEI_MP_SERVICES_PPI mMpServicesPpi = {
+ PeiGetNumberOfProcessors,
+ PeiGetProcessorInfo,
+ PeiStartupAllAPs,
+ PeiStartupThisAP,
+ PeiSwitchBSP,
+ PeiEnableDisableAP,
+ PeiWhoAmI,
+};
+
+EFI_PEI_PPI_DESCRIPTOR mPeiCpuMpPpiDesc = {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiPeiMpServicesPpiGuid,
+ &mMpServicesPpi
+};
/**
Get CPU Package/Core/Thread location information.
return EFI_NOT_FOUND;
}
+/**
+ Worker function for SwitchBSP().
+
+ Worker function for SwitchBSP(), assigned to the AP which is intended to become BSP.
+
+ @param Buffer Pointer to CPU MP Data
+**/
+VOID
+EFIAPI
+FutureBSPProc (
+ IN VOID *Buffer
+ )
+{
+ PEI_CPU_MP_DATA *DataInHob;
+
+ DataInHob = (PEI_CPU_MP_DATA *) Buffer;
+ AsmExchangeRole (&DataInHob->APInfo, &DataInHob->BSPInfo);
+}
+
/**
This service retrieves the number of logical processor in the platform
and the number of those logical processors that are enabled on this boot.
return EFI_NOT_READY;
}
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Backup original data and copy AP reset vector in it
+ //
+ BackupAndPrepareWakeupBuffer(PeiCpuMpData);
+ }
+
WaitCountNumber = TimeoutInMicroSeconds / CPU_CHECK_AP_INTERVAL + 1;
WaitCountIndex = 0;
FinishedCount = &PeiCpuMpData->FinishedCount;
}
}
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Restore original data
+ //
+ RestoreWakeupBuffer(PeiCpuMpData);
+ }
+
return Status;
}
return EFI_INVALID_PARAMETER;
}
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Backup original data and copy AP reset vector in it
+ //
+ BackupAndPrepareWakeupBuffer(PeiCpuMpData);
+ }
+
WaitCountNumber = TimeoutInMicroseconds / CPU_CHECK_AP_INTERVAL + 1;
WaitCountIndex = 0;
FinishedCount = &PeiCpuMpData->FinishedCount;
}
}
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Backup original data and copy AP reset vector in it
+ //
+ RestoreWakeupBuffer(PeiCpuMpData);
+ }
+
return Status;
}
+/**
+ This service switches the requested AP to be the BSP from that point onward.
+ This service changes the BSP for all purposes. This call can only be performed
+ by the current BSP.
+
+ This service switches the requested AP to be the BSP from that point onward.
+ This service changes the BSP for all purposes. The new BSP can take over the
+ execution of the old BSP and continue seamlessly from where the old one left
+ off.
+
+ If the BSP cannot be switched prior to the return from this service, then
+ EFI_UNSUPPORTED must be returned.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
+ @param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the
+ total number of logical processors minus 1. The total
+ number of logical processors can be retrieved by
+ EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
+ @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an enabled
+ AP. Otherwise, it will be disabled.
+
+ @retval EFI_SUCCESS BSP successfully switched.
+ @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to this
+ service returning.
+ @retval EFI_UNSUPPORTED Switching the BSP is not supported.
+ @retval EFI_SUCCESS The calling processor is an AP.
+ @retval EFI_NOT_FOUND The processor with the handle specified by
+ ProcessorNumber does not exist.
+ @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or a disabled
+ AP.
+ @retval EFI_NOT_READY The specified AP is busy.
+**/
+EFI_STATUS
+EFIAPI
+PeiSwitchBSP (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PEI_MP_SERVICES_PPI *This,
+ IN UINTN ProcessorNumber,
+ IN BOOLEAN EnableOldBSP
+ )
+{
+ PEI_CPU_MP_DATA *PeiCpuMpData;
+ UINTN CallerNumber;
+ MSR_IA32_APIC_BASE ApicBaseMsr;
+
+ PeiCpuMpData = GetMpHobData ();
+ if (PeiCpuMpData == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Check whether caller processor is BSP
+ //
+ PeiWhoAmI (PeiServices, This, &CallerNumber);
+ if (CallerNumber != PeiCpuMpData->BspNumber) {
+ return EFI_SUCCESS;
+ }
+
+ if (ProcessorNumber >= PeiCpuMpData->CpuCount) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Check whether specified AP is disabled
+ //
+ if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateDisabled) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check whether ProcessorNumber specifies the current BSP
+ //
+ if (ProcessorNumber == PeiCpuMpData->BspNumber) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check whether specified AP is busy
+ //
+ if (PeiCpuMpData->CpuData[ProcessorNumber].State == CpuStateBusy) {
+ return EFI_NOT_READY;
+ }
+
+ //
+ // Clear the BSP bit of MSR_IA32_APIC_BASE
+ //
+ ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE_ADDRESS);
+ ApicBaseMsr.Bits.Bsp = 0;
+ AsmWriteMsr64 (MSR_IA32_APIC_BASE_ADDRESS, ApicBaseMsr.Uint64);
+
+ PeiCpuMpData->BSPInfo.State = CPU_SWITCH_STATE_IDLE;
+ PeiCpuMpData->APInfo.State = CPU_SWITCH_STATE_IDLE;
+
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Backup original data and copy AP reset vector in it
+ //
+ BackupAndPrepareWakeupBuffer(PeiCpuMpData);
+ }
+
+ //
+ // Need to wakeUp AP (future BSP).
+ //
+ WakeUpAP (PeiCpuMpData, FALSE, PeiCpuMpData->CpuData[ProcessorNumber].ApicId, FutureBSPProc, PeiCpuMpData);
+
+ AsmExchangeRole (&PeiCpuMpData->BSPInfo, &PeiCpuMpData->APInfo);
+
+ if (PeiCpuMpData->EndOfPeiFlag) {
+ //
+ // Backup original data and copy AP reset vector in it
+ //
+ RestoreWakeupBuffer(PeiCpuMpData);
+ }
+
+ //
+ // Set the BSP bit of MSR_IA32_APIC_BASE on new BSP
+ //
+ ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE_ADDRESS);
+ ApicBaseMsr.Bits.Bsp = 1;
+ AsmWriteMsr64 (MSR_IA32_APIC_BASE_ADDRESS, ApicBaseMsr.Uint64);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This service lets the caller enable or disable an AP from this point onward.
+ This service may only be called from the BSP.
+
+ This service allows the caller enable or disable an AP from this point onward.
+ The caller can optionally specify the health status of the AP by Health. If
+ an AP is being disabled, then the state of the disabled AP is implementation
+ dependent. If an AP is enabled, then the implementation must guarantee that a
+ complete initialization sequence is performed on the AP, so the AP is in a state
+ that is compatible with an MP operating system.
+
+ If the enable or disable AP operation cannot be completed prior to the return
+ from this service, then EFI_UNSUPPORTED must be returned.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
+ @param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the
+ total number of logical processors minus 1. The total
+ number of logical processors can be retrieved by
+ EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
+ @param[in] EnableAP Specifies the new state for the processor for enabled,
+ FALSE for disabled.
+ @param[in] HealthFlag If not NULL, a pointer to a value that specifies the
+ new health status of the AP. This flag corresponds to
+ StatusFlag defined in EFI_PEI_MP_SERVICES_PPI.GetProcessorInfo().
+ Only the PROCESSOR_HEALTH_STATUS_BIT is used. All other
+ bits are ignored. If it is NULL, this parameter is
+ ignored.
+
+ @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
+ @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed prior
+ to this service returning.
+ @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
+ @retval EFI_DEVICE_ERROR The calling processor is an AP.
+ @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
+ does not exist.
+ @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
+**/
+EFI_STATUS
+EFIAPI
+PeiEnableDisableAP (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PEI_MP_SERVICES_PPI *This,
+ IN UINTN ProcessorNumber,
+ IN BOOLEAN EnableAP,
+ IN UINT32 *HealthFlag OPTIONAL
+ )
+{
+ PEI_CPU_MP_DATA *PeiCpuMpData;
+ UINTN CallerNumber;
+
+ PeiCpuMpData = GetMpHobData ();
+ if (PeiCpuMpData == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Check whether caller processor is BSP
+ //
+ PeiWhoAmI (PeiServices, This, &CallerNumber);
+ if (CallerNumber != PeiCpuMpData->BspNumber) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ if (ProcessorNumber == PeiCpuMpData->BspNumber) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (ProcessorNumber >= PeiCpuMpData->CpuCount) {
+ return EFI_NOT_FOUND;
+ }
+
+ if (!EnableAP) {
+ PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateDisabled;
+ } else {
+ PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateIdle;
+ }
+
+ if (HealthFlag != NULL) {
+ PeiCpuMpData->CpuData[ProcessorNumber].CpuHealthy =
+ (BOOLEAN) ((*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT) != 0);
+ }
+ return EFI_SUCCESS;
+}
/**
This return the handle number for the calling processor. This service may be
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