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/** @file
FSP MultiPhase library.
Copyright (c) 2022 - 2025, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/FspCommonLib.h>
#include <Library/FspSwitchStackLib.h>
#include <Library/FspSecPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <FspEas/FspApi.h>
#include <FspGlobalData.h>
EFI_STATUS
EFIAPI
FspMultiPhaseSwitchStack (
)
{
SetFspApiReturnStatus (EFI_SUCCESS);
Pei2LoaderSwitchStack ();
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
FspVariableRequestSwitchStack (
IN FSP_MULTI_PHASE_VARIABLE_REQUEST_INFO_PARAMS *FspVariableRequestParams
)
{
FSP_GLOBAL_DATA *FspData;
FspData = GetFspGlobalDataPointer ();
if (((UINTN)FspData == 0) || ((UINTN)FspData == 0xFFFFFFFF)) {
return EFI_UNSUPPORTED;
}
FspData->VariableRequestParameterPtr = (VOID *)FspVariableRequestParams;
SetFspApiReturnStatus (FSP_STATUS_VARIABLE_REQUEST);
Pei2LoaderSwitchStack ();
return EFI_SUCCESS;
}
/**
This function supports FspMultiPhase implementation.
@param[in] ApiIdx Internal index of the FSP API.
@param[in] ApiParam Parameter of the FSP API.
@retval EFI_SUCCESS FSP execution was successful.
@retval EFI_INVALID_PARAMETER Input parameters are invalid.
@retval EFI_UNSUPPORTED The FSP calling conditions were not met.
@retval EFI_DEVICE_ERROR FSP initialization failed.
**/
EFI_STATUS
FspMultiPhaseWorker (
IN UINT32 ApiIdx,
IN VOID *ApiParam
)
{
FSP_MULTI_PHASE_PARAMS *FspMultiPhaseParams;
FSP_GLOBAL_DATA *FspData;
FSP_MULTI_PHASE_GET_NUMBER_OF_PHASES_PARAMS *FspMultiPhaseGetNumber;
BOOLEAN FspDataValid;
UINT32 NumberOfPhasesSupported;
FspDataValid = TRUE;
FspData = GetFspGlobalDataPointer ();
if (((UINTN)FspData == 0) || ((UINTN)FspData == 0xFFFFFFFF)) {
FspDataValid = FALSE;
}
//
// It is required that FspData->NumberOfPhases to be reset to 0 after
// current FSP component finished.
// The next component FspData->NumberOfPhases will only be re-initialized when FspData->NumberOfPhases = 0
//
if ((FspDataValid == TRUE) && (FspData->NumberOfPhases == 0)) {
FspData->NumberOfPhases = PcdGet32 (PcdMultiPhaseNumberOfPhases);
FspData->PhasesExecuted = 0;
if (FspMultiPhasePlatformGetNumberOfPhases (ApiIdx, &NumberOfPhasesSupported) == TRUE) {
//
// Platform has implemented runtime controlling for NumberOfPhasesSupported
//
FspData->NumberOfPhases = NumberOfPhasesSupported;
}
}
FspMultiPhaseParams = (FSP_MULTI_PHASE_PARAMS *)ApiParam;
if (FspDataValid == FALSE) {
return EFI_DEVICE_ERROR;
} else {
switch (FspMultiPhaseParams->MultiPhaseAction) {
case EnumMultiPhaseGetNumberOfPhases:
if ((FspMultiPhaseParams->MultiPhaseParamPtr == NULL) || (FspMultiPhaseParams->PhaseIndex != 0)) {
return EFI_INVALID_PARAMETER;
}
FspMultiPhaseGetNumber = (FSP_MULTI_PHASE_GET_NUMBER_OF_PHASES_PARAMS *)FspMultiPhaseParams->MultiPhaseParamPtr;
FspMultiPhaseGetNumber->NumberOfPhases = FspData->NumberOfPhases;
FspMultiPhaseGetNumber->PhasesExecuted = FspData->PhasesExecuted;
break;
case EnumMultiPhaseExecutePhase:
if ((FspMultiPhaseParams->PhaseIndex > FspData->PhasesExecuted) && (FspMultiPhaseParams->PhaseIndex <= FspData->NumberOfPhases)) {
FspData->PhasesExecuted = FspMultiPhaseParams->PhaseIndex;
return Loader2PeiSwitchStack ();
} else {
return EFI_INVALID_PARAMETER;
}
break;
case EnumMultiPhaseGetVariableRequestInfo:
//
// return variable request info
//
FspMultiPhaseParams->MultiPhaseParamPtr = FspData->VariableRequestParameterPtr;
break;
case EnumMultiPhaseCompleteVariableRequest:
//
// retrieve complete variable request params
//
FspData->VariableRequestParameterPtr = FspMultiPhaseParams->MultiPhaseParamPtr;
return Loader2PeiSwitchStack ();
break;
default:
return EFI_UNSUPPORTED;
}
}
return EFI_SUCCESS;
}
/**
This function handles FspMultiPhaseMemInitApi.
@param[in] ApiIdx Internal index of the FSP API.
@param[in] ApiParam Parameter of the FSP API.
@retval EFI_SUCCESS FSP execution was successful.
@retval EFI_INVALID_PARAMETER Input parameters are invalid.
@retval EFI_UNSUPPORTED The FSP calling conditions were not met.
@retval EFI_DEVICE_ERROR FSP initialization failed.
**/
EFI_STATUS
EFIAPI
FspMultiPhaseMemInitApiHandler (
IN UINT32 ApiIdx,
IN VOID *ApiParam
)
{
return FspMultiPhaseWorker (ApiIdx, ApiParam);
}
/**
This function handles FspMultiPhaseSiInitApi.
@param[in] ApiIdx Internal index of the FSP API.
@param[in] ApiParam Parameter of the FSP API.
@retval EFI_SUCCESS FSP execution was successful.
@retval EFI_INVALID_PARAMETER Input parameters are invalid.
@retval EFI_UNSUPPORTED The FSP calling conditions were not met.
@retval EFI_DEVICE_ERROR FSP initialization failed.
**/
EFI_STATUS
EFIAPI
FspMultiPhaseSiInitApiHandlerV2 (
IN UINT32 ApiIdx,
IN VOID *ApiParam
)
{
return FspMultiPhaseWorker (ApiIdx, ApiParam);
}
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