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/** @file
C functions in SEC
Copyright (c) 2014, 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 "SecMain.h"
EFI_PEI_PPI_DESCRIPTOR mPeiSecMainPpi[] = {
{
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
&gTopOfTemporaryRamPpiGuid,
NULL // To be patched later.
},
};
//
// These are IDT entries pointing to 10:FFFFFFE4h.
//
UINT64 mIdtEntryTemplate = 0xffff8e000010ffe4ULL;
/**
Caller provided function to be invoked at the end of InitializeDebugAgent().
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] Context The first input parameter of InitializeDebugAgent().
**/
VOID
EFIAPI
SecStartupPhase2(
IN VOID *Context
);
/**
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 tempory ram
@param[in] BootFirmwareVolume Base address of the Boot Firmware Volume.
**/
VOID
EFIAPI
SecStartup (
IN UINT32 SizeOfRam,
IN UINT32 TempRamBase,
IN VOID *BootFirmwareVolume
)
{
EFI_SEC_PEI_HAND_OFF SecCoreData;
IA32_DESCRIPTOR IdtDescriptor;
SEC_IDT_TABLE IdtTableInStack;
UINT32 Index;
UINT32 PeiStackSize;
PeiStackSize = PcdGet32 (PcdPeiTemporaryRamStackSize);
if (PeiStackSize == 0) {
PeiStackSize = (SizeOfRam >> 1);
}
ASSERT (PeiStackSize < SizeOfRam);
//
// Process all libraries constructor function linked to SecCore.
//
ProcessLibraryConstructorList ();
DEBUG ((DEBUG_INFO, "SecCore - SecStartup\n"));
//
// Initialize floating point operating environment
// to be compliant with UEFI spec.
//
InitializeFloatingPointUnits ();
// |-------------------|---->
// |Idt Table |
// |-------------------|
// |PeiService Pointer | PeiStackSize
// |-------------------|
// | |
// | Stack |
// |-------------------|---->
// | |
// | |
// | Heap | PeiTemporayRamSize
// | |
// | |
// |-------------------|----> TempRamBase
IdtTableInStack.PeiService = 0;
for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&mIdtEntryTemplate, sizeof (UINT64));
}
IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;
IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);
AsmWriteIdtr (&IdtDescriptor);
//
// Update the base address and length of Pei temporary memory
//
SecCoreData.DataSize = (UINT16) sizeof (EFI_SEC_PEI_HAND_OFF);
SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;
SecCoreData.BootFirmwareVolumeSize = (UINTN)(SIZE_4GB - (UINTN) BootFirmwareVolume);
SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;
SecCoreData.TemporaryRamSize = SizeOfRam;
SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
SecCoreData.PeiTemporaryRamSize = SizeOfRam - PeiStackSize;
SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);
SecCoreData.StackSize = PeiStackSize;
DEBUG ((DEBUG_INFO, "BootFirmwareVolumeBase - 0x%x\n", SecCoreData.BootFirmwareVolumeBase));
DEBUG ((DEBUG_INFO, "BootFirmwareVolumeSize - 0x%x\n", SecCoreData.BootFirmwareVolumeSize));
DEBUG ((DEBUG_INFO, "TemporaryRamBase - 0x%x\n", SecCoreData.TemporaryRamBase));
DEBUG ((DEBUG_INFO, "TemporaryRamSize - 0x%x\n", SecCoreData.TemporaryRamSize));
DEBUG ((DEBUG_INFO, "PeiTemporaryRamBase - 0x%x\n", SecCoreData.PeiTemporaryRamBase));
DEBUG ((DEBUG_INFO, "PeiTemporaryRamSize - 0x%x\n", SecCoreData.PeiTemporaryRamSize));
DEBUG ((DEBUG_INFO, "StackBase - 0x%x\n", SecCoreData.StackBase));
DEBUG ((DEBUG_INFO, "StackSize - 0x%x\n", SecCoreData.StackSize));
//
// Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.
//
InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);
}
/**
This API patch the TopOfTemporaryRam value in SecPpiList.
@param[in,out] SecPpiList PPI list to be patched.
@param[in] TopOfTemporaryRam The top of CAR.
**/
VOID
PatchTopOfTemporaryRamPpi (
IN OUT EFI_PEI_PPI_DESCRIPTOR *SecPpiList,
IN VOID *TopOfTemporaryRam
)
{
SecPpiList[0].Ppi = TopOfTemporaryRam;
}
/**
Caller provided function to be invoked at the end of InitializeDebugAgent().
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] Context The first input parameter of InitializeDebugAgent().
**/
VOID
EFIAPI
SecStartupPhase2(
IN VOID *Context
)
{
EFI_SEC_PEI_HAND_OFF *SecCoreData;
EFI_PEI_PPI_DESCRIPTOR *PpiList;
UINT32 Index;
EFI_PEI_PPI_DESCRIPTOR LocalSecPpiList[sizeof(mPeiSecMainPpi)/sizeof(mPeiSecMainPpi[0])];
EFI_PEI_PPI_DESCRIPTOR AllSecPpiList[FixedPcdGet32(PcdSecCoreMaxPpiSupported)];
EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;
SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;
//
// Find Pei Core entry point. It will report SEC and Pei Core debug information if remote debug
// is enabled.
//
FindAndReportEntryPoints ((EFI_FIRMWARE_VOLUME_HEADER *) SecCoreData->BootFirmwareVolumeBase, &PeiCoreEntryPoint);
if (PeiCoreEntryPoint == NULL)
{
CpuDeadLoop ();
}
CopyMem (LocalSecPpiList, mPeiSecMainPpi, sizeof(mPeiSecMainPpi));
PatchTopOfTemporaryRamPpi (LocalSecPpiList, (VOID *)((UINTN)SecCoreData->TemporaryRamBase + SecCoreData->TemporaryRamSize));
//
// Perform platform specific initialization before entering PeiCore.
//
PpiList = SecPlatformMain (SecCoreData);
if (PpiList != NULL) {
//
// Remove the terminal flag from the terminal Ppi
//
CopyMem (AllSecPpiList, LocalSecPpiList, sizeof (LocalSecPpiList));
for (Index = 0; Index < PcdGet32 (PcdSecCoreMaxPpiSupported); Index ++) {
if ((AllSecPpiList[Index].Flags & EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) == EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) {
break;
}
}
AllSecPpiList[Index].Flags = AllSecPpiList[Index].Flags & (~EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);
//
// Append the platform additional Ppi list
//
Index += 1;
while (Index < PcdGet32 (PcdSecCoreMaxPpiSupported) &&
((PpiList->Flags & EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) != EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST)) {
CopyMem (&AllSecPpiList[Index], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
Index++;
PpiList++;
}
//
// Check whether the total Ppis exceeds the max supported Ppi.
//
if (Index >= PcdGet32 (PcdSecCoreMaxPpiSupported)) {
//
// the total Ppi is larger than the supported Max
// PcdSecCoreMaxPpiSupported can be enlarged to solve it.
//
CpuDeadLoop ();
} else {
//
// Add the terminal Ppi
//
CopyMem (&AllSecPpiList[Index], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
}
//
// Set PpiList to the total Ppi
//
PpiList = &AllSecPpiList[0];
} else {
//
// No addition Ppi, PpiList directly point to the common Ppi list.
//
PpiList = &LocalSecPpiList[0];
}
//
// Transfer the control to the PEI core
//
ASSERT (PeiCoreEntryPoint != NULL);
(*PeiCoreEntryPoint) (SecCoreData, PpiList);
//
// Should not come here.
//
return ;
}
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