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/** @file
Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "SecFsp.h"
/**
Calculate the FSP IDT gate descriptor.
@param[in] IdtEntryTemplate IDT gate descriptor template.
@return FSP specific IDT gate descriptor.
**/
UINT64
FspGetExceptionHandler (
IN UINT64 IdtEntryTemplate
)
{
UINT32 Entry;
UINT64 ExceptionHandler;
IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor;
FSP_INFO_HEADER *FspInfoHeader;
FspInfoHeader = (FSP_INFO_HEADER *)AsmGetFspInfoHeader ();
ExceptionHandler = IdtEntryTemplate;
IdtGateDescriptor = (IA32_IDT_GATE_DESCRIPTOR *)&ExceptionHandler;
Entry = (IdtGateDescriptor->Bits.OffsetHigh << 16) | IdtGateDescriptor->Bits.OffsetLow;
Entry = FspInfoHeader->ImageBase + FspInfoHeader->ImageSize - (~Entry + 1);
IdtGateDescriptor->Bits.OffsetHigh = (UINT16)(Entry >> 16);
IdtGateDescriptor->Bits.OffsetLow = (UINT16)Entry;
return ExceptionHandler;
}
/**
This interface fills platform specific data.
@param[in,out] FspData Pointer to the FSP global data.
**/
VOID
EFIAPI
SecGetPlatformData (
IN OUT FSP_GLOBAL_DATA *FspData
)
{
FSP_PLAT_DATA *FspPlatformData;
UINT32 TopOfCar;
UINT32 *StackPtr;
UINT32 DwordSize;
FspPlatformData = &FspData->PlatformData;
//
// The entries of platform information, together with the number of them,
// reside in the bottom of stack, left untouched by normal stack operation.
//
FspPlatformData->DataPtr = NULL;
FspPlatformData->MicrocodeRegionBase = 0;
FspPlatformData->MicrocodeRegionSize = 0;
FspPlatformData->CodeRegionBase = 0;
FspPlatformData->CodeRegionSize = 0;
//
// Pointer to the size field
//
TopOfCar = PcdGet32 (PcdTemporaryRamBase) + PcdGet32 (PcdTemporaryRamSize);
StackPtr = (UINT32 *)(TopOfCar - sizeof (UINT32));
if (*(StackPtr - 1) == FSP_MCUD_SIGNATURE) {
while (*StackPtr != 0) {
if (*(StackPtr - 1) == FSP_MCUD_SIGNATURE) {
//
// This following data was pushed onto stack after TempRamInit API
//
DwordSize = 4;
StackPtr = StackPtr - 1 - DwordSize;
CopyMem (&(FspPlatformData->MicrocodeRegionBase), StackPtr, (DwordSize << 2));
StackPtr--;
} else if (*(StackPtr - 1) == FSP_PER0_SIGNATURE) {
//
// This is the performance data for InitTempMemory API entry/exit
//
DwordSize = 4;
StackPtr = StackPtr - 1 - DwordSize;
CopyMem (FspData->PerfData, StackPtr, (DwordSize << 2));
((UINT8 *)(&FspData->PerfData[0]))[7] = FSP_PERF_ID_API_TEMP_RAM_INIT_ENTRY;
((UINT8 *)(&FspData->PerfData[1]))[7] = FSP_PERF_ID_API_TEMP_RAM_INIT_EXIT;
StackPtr--;
} else {
StackPtr -= (*StackPtr);
}
}
}
}
/**
Initialize the FSP global data region.
It needs to be done as soon as possible after the stack is setup.
@param[in,out] PeiFspData Pointer of the FSP global data.
@param[in] BootLoaderStack BootLoader stack.
@param[in] ApiIdx The index of the FSP API.
**/
VOID
FspGlobalDataInit (
IN OUT FSP_GLOBAL_DATA *PeiFspData,
IN UINT32 BootLoaderStack,
IN UINT8 ApiIdx
)
{
VOID *FspmUpdDataPtr;
CHAR8 ImageId[9];
UINTN Idx;
//
// Set FSP Global Data pointer
//
SetFspGlobalDataPointer (PeiFspData);
ZeroMem ((VOID *)PeiFspData, sizeof (FSP_GLOBAL_DATA));
PeiFspData->Signature = FSP_GLOBAL_DATA_SIGNATURE;
PeiFspData->Version = 0;
PeiFspData->CoreStack = BootLoaderStack;
PeiFspData->PerfIdx = 2;
PeiFspData->PerfSig = FSP_PERFORMANCE_DATA_SIGNATURE;
SetFspMeasurePoint (FSP_PERF_ID_API_FSP_MEMORY_INIT_ENTRY);
//
// Get FSP Header offset
// It may have multiple FVs, so look into the last one for FSP header
//
PeiFspData->FspInfoHeader = (FSP_INFO_HEADER *)AsmGetFspInfoHeader ();
SecGetPlatformData (PeiFspData);
//
// Set API calling mode
//
SetFspApiCallingIndex (ApiIdx);
//
// Set UPD pointer
//
FspmUpdDataPtr = (VOID *)GetFspApiParameter ();
if (FspmUpdDataPtr == NULL) {
FspmUpdDataPtr = (VOID *)(PeiFspData->FspInfoHeader->ImageBase + PeiFspData->FspInfoHeader->CfgRegionOffset);
}
SetFspUpdDataPointer (FspmUpdDataPtr);
SetFspMemoryInitUpdDataPointer (FspmUpdDataPtr);
SetFspSiliconInitUpdDataPointer (NULL);
//
// Initialize OnSeparateStack value.
//
if (PcdGet8 (PcdFspHeapSizePercentage) != 0) {
//
// FSP is running on its own stack and may need switching stack when calling bootloader functions.
//
GetFspGlobalDataPointer ()->OnSeparateStack = 1;
}
//
// Initialize serial port
// It might have been done in ProcessLibraryConstructorList(), however,
// the FSP global data is not initialized at that time. So do it again
// for safe.
//
SerialPortInitialize ();
//
// Ensure the global data pointer is valid
//
ASSERT (GetFspGlobalDataPointer () == PeiFspData);
for (Idx = 0; Idx < 8; Idx++) {
ImageId[Idx] = PeiFspData->FspInfoHeader->ImageId[Idx];
}
ImageId[Idx] = 0;
DEBUG ((
DEBUG_INFO | DEBUG_INIT,
"\n============= FSP Spec v%d.%d Header Revision v%x (%a v%x.%x.%x.%x) =============\n", \
(PeiFspData->FspInfoHeader->SpecVersion >> 4) & 0xF, \
PeiFspData->FspInfoHeader->SpecVersion & 0xF, \
PeiFspData->FspInfoHeader->HeaderRevision, \
ImageId, \
(PeiFspData->FspInfoHeader->ImageRevision >> 24) & 0xFF, \
(PeiFspData->FspInfoHeader->ImageRevision >> 16) & 0xFF, \
(PeiFspData->FspInfoHeader->HeaderRevision >= 6) ? \
(((PeiFspData->FspInfoHeader->ImageRevision >> 8) & 0xFF) | (PeiFspData->FspInfoHeader->ExtendedImageRevision & 0xFF00)) :\
((PeiFspData->FspInfoHeader->ImageRevision >> 8) & 0xFF), \
(PeiFspData->FspInfoHeader->HeaderRevision >= 6) ? \
((PeiFspData->FspInfoHeader->ImageRevision & 0xFF) | ((PeiFspData->FspInfoHeader->ExtendedImageRevision & 0xFF) << 8)): \
(PeiFspData->FspInfoHeader->ImageRevision & 0xFF)
));
}
/**
Adjust the FSP data pointers after the stack is migrated to memory.
@param[in] OffsetGap The offset gap between the old stack and the new stack.
**/
VOID
FspDataPointerFixUp (
IN UINT32 OffsetGap
)
{
FSP_GLOBAL_DATA *NewFspData;
NewFspData = (FSP_GLOBAL_DATA *)((UINTN)GetFspGlobalDataPointer () + (UINTN)OffsetGap);
SetFspGlobalDataPointer (NewFspData);
}
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