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/** @file
Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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 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 golbal 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->ImageRevision >> 8) & 0xFF, \
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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