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- /** @file
- Copyright (c) 2014 - 2022, 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.
- **/
- IA32_IDT_GATE_DESCRIPTOR
- FspGetExceptionHandler (
- IN UINT64 IdtEntryTemplate
- )
- {
- UINT32 Entry;
- IA32_IDT_GATE_DESCRIPTOR ExceptionHandler;
- IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor;
- FSP_INFO_HEADER *FspInfoHeader;
- ZeroMem ((VOID *)&ExceptionHandler, sizeof (IA32_IDT_GATE_DESCRIPTOR));
- FspInfoHeader = (FSP_INFO_HEADER *)(UINTN)AsmGetFspInfoHeader ();
- *(UINT64 *) &ExceptionHandler = IdtEntryTemplate;
- IdtGateDescriptor = &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 UINTN 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 = FSP_GLOBAL_DATA_VERSION;
- PeiFspData->CoreStack = BootLoaderStack;
- PeiFspData->PerfIdx = 2;
- PeiFspData->PerfSig = FSP_PERFORMANCE_DATA_SIGNATURE;
- //
- // Cache FspHobList pointer passed by bootloader via ApiParameter2
- //
- PeiFspData->FspHobListPtr = (VOID **)GetFspApiParameter2 ();
- 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 *)(UINTN)AsmGetFspInfoHeader ();
- SecGetPlatformData (PeiFspData);
- //
- // Set API calling mode
- //
- SetFspApiCallingIndex (ApiIdx);
- //
- // Set UPD pointer
- //
- FspmUpdDataPtr = (VOID *)GetFspApiParameter ();
- if (FspmUpdDataPtr == NULL) {
- FspmUpdDataPtr = (VOID *)(UINTN)(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 UINTN OffsetGap
- )
- {
- FSP_GLOBAL_DATA *NewFspData;
- NewFspData = (FSP_GLOBAL_DATA *)((UINTN)GetFspGlobalDataPointer () + (UINTN)OffsetGap);
- SetFspGlobalDataPointer (NewFspData);
- }
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