diff options
Diffstat (limited to 'roms/edk2/IntelFsp2Pkg/FspSecCore/SecMain.c')
| -rw-r--r-- | roms/edk2/IntelFsp2Pkg/FspSecCore/SecMain.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/roms/edk2/IntelFsp2Pkg/FspSecCore/SecMain.c b/roms/edk2/IntelFsp2Pkg/FspSecCore/SecMain.c new file mode 100644 index 000000000..c8de52e1d --- /dev/null +++ b/roms/edk2/IntelFsp2Pkg/FspSecCore/SecMain.c @@ -0,0 +1,298 @@ +/** @file
+
+ Copyright (c) 2014 - 2020, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "SecMain.h"
+#include "SecFsp.h"
+
+EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI gSecTemporaryRamSupportPpi = {
+ SecTemporaryRamSupport
+};
+
+EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {
+ {
+ EFI_PEI_PPI_DESCRIPTOR_PPI,
+ &gFspInApiModePpiGuid,
+ NULL
+ },
+ {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiTemporaryRamSupportPpiGuid,
+ &gSecTemporaryRamSupportPpi
+ }
+};
+
+//
+// These are IDT entries pointing to 08:FFFFFFE4h.
+//
+UINT64 mIdtEntryTemplate = 0xffff8e000008ffe4ULL;
+
+/**
+
+ Entry point to the C language phase of SEC. After the SEC assembly
+ code has initialized some temporary memory and set up the stack,
+ the control is transferred to this function.
+
+
+ @param[in] SizeOfRam Size of the temporary memory available for use.
+ @param[in] TempRamBase Base address of temporary ram
+ @param[in] BootFirmwareVolume Base address of the Boot Firmware Volume.
+ @param[in] PeiCore PeiCore entry point.
+ @param[in] BootLoaderStack BootLoader stack.
+ @param[in] ApiIdx the index of API.
+
+ @return This function never returns.
+
+**/
+VOID
+EFIAPI
+SecStartup (
+ IN UINT32 SizeOfRam,
+ IN UINT32 TempRamBase,
+ IN VOID *BootFirmwareVolume,
+ IN PEI_CORE_ENTRY PeiCore,
+ IN UINT32 BootLoaderStack,
+ IN UINT32 ApiIdx
+ )
+{
+ EFI_SEC_PEI_HAND_OFF SecCoreData;
+ IA32_DESCRIPTOR IdtDescriptor;
+ SEC_IDT_TABLE IdtTableInStack;
+ UINT32 Index;
+ FSP_GLOBAL_DATA PeiFspData;
+ UINT64 ExceptionHandler;
+ UINTN IdtSize;
+
+ //
+ // Process all libraries constructor function linked to SecCore.
+ //
+ ProcessLibraryConstructorList ();
+
+ //
+ // Initialize floating point operating environment
+ // to be compliant with UEFI spec.
+ //
+ InitializeFloatingPointUnits ();
+
+ //
+ // Scenario 1 memory map when running on bootloader stack
+ //
+ // |-------------------|---->
+ // |Idt Table |
+ // |-------------------|
+ // |PeiService Pointer |
+ // |-------------------|
+ // | |
+ // | |
+ // | Heap |
+ // | |
+ // | |
+ // |-------------------|----> TempRamBase
+ //
+ //
+ // |-------------------|
+ // |Bootloader stack |----> somewhere in memory, FSP will share this stack.
+ // |-------------------|
+
+ //
+ // Scenario 2 memory map when running FSP on a separate stack
+ //
+ // |-------------------|---->
+ // |Idt Table |
+ // |-------------------|
+ // |PeiService Pointer | PeiStackSize
+ // |-------------------|
+ // | |
+ // | Stack |
+ // |-------------------|---->
+ // | |
+ // | |
+ // | Heap | PeiTemporaryRamSize
+ // | |
+ // | |
+ // |-------------------|----> TempRamBase
+ IdtTableInStack.PeiService = 0;
+ AsmReadIdtr (&IdtDescriptor);
+ if (IdtDescriptor.Base == 0) {
+ ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);
+ for (Index = 0; Index < FixedPcdGet8(PcdFspMaxInterruptSupported); Index ++) {
+ CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&ExceptionHandler, sizeof (UINT64));
+ }
+ IdtSize = sizeof (IdtTableInStack.IdtTable);
+ } else {
+ IdtSize = IdtDescriptor.Limit + 1;
+ if (IdtSize > sizeof (IdtTableInStack.IdtTable)) {
+ //
+ // ERROR: IDT table size from boot loader is larger than FSP can support, DeadLoop here!
+ //
+ CpuDeadLoop();
+ } else {
+ CopyMem ((VOID *) (UINTN) &IdtTableInStack.IdtTable, (VOID *) IdtDescriptor.Base, IdtSize);
+ }
+ }
+ IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;
+ IdtDescriptor.Limit = (UINT16)(IdtSize - 1);
+
+ AsmWriteIdtr (&IdtDescriptor);
+
+ //
+ // Initialize the global FSP data region
+ //
+ FspGlobalDataInit (&PeiFspData, BootLoaderStack, (UINT8)ApiIdx);
+
+ //
+ // Update the base address and length of Pei temporary memory
+ //
+ SecCoreData.DataSize = sizeof (EFI_SEC_PEI_HAND_OFF);
+ SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;
+ SecCoreData.BootFirmwareVolumeSize = (UINT32)((EFI_FIRMWARE_VOLUME_HEADER *)BootFirmwareVolume)->FvLength;
+
+ SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;
+ if (PcdGet8 (PcdFspHeapSizePercentage) == 0) {
+ SecCoreData.TemporaryRamSize = SizeOfRam; // stack size that is going to be copied to the permanent memory
+ SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
+ SecCoreData.PeiTemporaryRamSize = SecCoreData.TemporaryRamSize;
+ SecCoreData.StackBase = (VOID *)GetFspEntryStack(); // Share the same boot loader stack
+ SecCoreData.StackSize = 0;
+ } else {
+ SecCoreData.TemporaryRamSize = SizeOfRam;
+ SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
+ SecCoreData.PeiTemporaryRamSize = SecCoreData.TemporaryRamSize * PcdGet8 (PcdFspHeapSizePercentage) / 100;
+ SecCoreData.StackBase = (VOID*)(UINTN)((UINTN)SecCoreData.TemporaryRamBase + SecCoreData.PeiTemporaryRamSize);
+ SecCoreData.StackSize = SecCoreData.TemporaryRamSize - SecCoreData.PeiTemporaryRamSize;
+ }
+
+ DEBUG ((DEBUG_INFO, "Fsp BootFirmwareVolumeBase - 0x%x\n", SecCoreData.BootFirmwareVolumeBase));
+ DEBUG ((DEBUG_INFO, "Fsp BootFirmwareVolumeSize - 0x%x\n", SecCoreData.BootFirmwareVolumeSize));
+ DEBUG ((DEBUG_INFO, "Fsp TemporaryRamBase - 0x%x\n", SecCoreData.TemporaryRamBase));
+ DEBUG ((DEBUG_INFO, "Fsp TemporaryRamSize - 0x%x\n", SecCoreData.TemporaryRamSize));
+ DEBUG ((DEBUG_INFO, "Fsp PeiTemporaryRamBase - 0x%x\n", SecCoreData.PeiTemporaryRamBase));
+ DEBUG ((DEBUG_INFO, "Fsp PeiTemporaryRamSize - 0x%x\n", SecCoreData.PeiTemporaryRamSize));
+ DEBUG ((DEBUG_INFO, "Fsp StackBase - 0x%x\n", SecCoreData.StackBase));
+ DEBUG ((DEBUG_INFO, "Fsp StackSize - 0x%x\n", SecCoreData.StackSize));
+
+ //
+ // Call PeiCore Entry
+ //
+ PeiCore (&SecCoreData, mPeiSecPlatformInformationPpi);
+
+ //
+ // Should never be here
+ //
+ CpuDeadLoop ();
+}
+
+/**
+ This service of the TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into
+ permanent memory.
+
+ @param[in] PeiServices Pointer to the PEI Services Table.
+ @param[in] TemporaryMemoryBase Source Address in temporary memory from which the SEC or PEIM will copy the
+ Temporary RAM contents.
+ @param[in] PermanentMemoryBase Destination Address in permanent memory into which the SEC or PEIM will copy the
+ Temporary RAM contents.
+ @param[in] CopySize Amount of memory to migrate from temporary to permanent memory.
+
+ @retval EFI_SUCCESS The data was successfully returned.
+ @retval EFI_INVALID_PARAMETER PermanentMemoryBase + CopySize > TemporaryMemoryBase when
+ TemporaryMemoryBase > PermanentMemoryBase.
+
+**/
+EFI_STATUS
+EFIAPI
+SecTemporaryRamSupport (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
+ IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
+ IN UINTN CopySize
+ )
+{
+ IA32_DESCRIPTOR IdtDescriptor;
+ VOID* OldHeap;
+ VOID* NewHeap;
+ VOID* OldStack;
+ VOID* NewStack;
+ UINTN HeapSize;
+ UINTN StackSize;
+
+ UINTN CurrentStack;
+ UINTN FspStackBase;
+
+ //
+ // Override OnSeparateStack to 1 because this function will switch stack to permanent memory
+ // which makes FSP running on different stack from bootloader temporary ram stack.
+ //
+ GetFspGlobalDataPointer ()->OnSeparateStack = 1;
+
+ if (PcdGet8 (PcdFspHeapSizePercentage) == 0) {
+
+ CurrentStack = AsmReadEsp();
+ FspStackBase = (UINTN)GetFspEntryStack();
+
+ StackSize = FspStackBase - CurrentStack;
+ HeapSize = CopySize;
+
+ OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;
+ NewHeap = (VOID*)((UINTN)PermanentMemoryBase);
+
+ OldStack = (VOID*)CurrentStack;
+ //
+ //The old stack is copied at the end of the stack region because stack grows down.
+ //
+ NewStack = (VOID*)((UINTN)PermanentMemoryBase - StackSize);
+
+ } else {
+ HeapSize = CopySize * PcdGet8 (PcdFspHeapSizePercentage) / 100 ;
+ StackSize = CopySize - HeapSize;
+
+ OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;
+ NewHeap = (VOID*)((UINTN)PermanentMemoryBase + StackSize);
+
+ OldStack = (VOID*)((UINTN)TemporaryMemoryBase + HeapSize);
+ NewStack = (VOID*)(UINTN)PermanentMemoryBase;
+
+ }
+ //
+ // Migrate Heap
+ //
+ CopyMem (NewHeap, OldHeap, HeapSize);
+
+ //
+ // Migrate Stack
+ //
+ CopyMem (NewStack, OldStack, StackSize);
+
+
+ //
+ // We need *not* fix the return address because currently,
+ // The PeiCore is executed in flash.
+ //
+
+ //
+ // Rebase IDT table in permanent memory
+ //
+ AsmReadIdtr (&IdtDescriptor);
+ IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;
+
+ AsmWriteIdtr (&IdtDescriptor);
+
+ //
+ // Fixed the FSP data pointer
+ //
+ FspDataPointerFixUp ((UINTN)NewStack - (UINTN)OldStack);
+
+ //
+ // SecSwitchStack function must be invoked after the memory migration
+ // immediately, also we need fixup the stack change caused by new call into
+ // permanent memory.
+ //
+ SecSwitchStack (
+ (UINT32) (UINTN) OldStack,
+ (UINT32) (UINTN) NewStack
+ );
+
+ return EFI_SUCCESS;
+}
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