/*++
Routine Description:
This is the service to load the SEC Core from the Firmware Volume
Arguments:
LargestRegion - Memory to use for SEC.
LargestRegionSize - Size of Memory to use for PEI
BootFirmwareVolumeBase - Start of the Boot FV
PeiCorePe32File - SEC PE32
Returns:
Success means control is transfered and thus we should never return
**/
VOID
SecLoadFromCore (
IN UINTN LargestRegion,
IN UINTN LargestRegionSize,
IN UINTN BootFirmwareVolumeBase,
IN VOID *PeiCorePe32File
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS TopOfMemory;
VOID *TopOfStack;
EFI_PHYSICAL_ADDRESS PeiCoreEntryPoint;
EFI_SEC_PEI_HAND_OFF *SecCoreData;
UINTN PeiStackSize;
//
// Compute Top Of Memory for Stack and PEI Core Allocations
//
TopOfMemory = LargestRegion + LargestRegionSize;
PeiStackSize = (UINTN)RShiftU64((UINT64)STACK_SIZE,1);
//
// |-----------| <---- TemporaryRamBase + TemporaryRamSize
// | Heap |
// | |
// |-----------| <---- StackBase / PeiTemporaryMemoryBase
// | |
// | Stack |
// |-----------| <---- TemporaryRamBase
//
TopOfStack = (VOID *)(LargestRegion + PeiStackSize);
TopOfMemory = LargestRegion + PeiStackSize;
//
// Reservet space for storing PeiCore's parament in stack.
//
TopOfStack = (VOID *)((UINTN)TopOfStack - sizeof (EFI_SEC_PEI_HAND_OFF) - CPU_STACK_ALIGNMENT);
TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
//
// Bind this information into the SEC hand-off state
//
SecCoreData = (EFI_SEC_PEI_HAND_OFF*)(UINTN) TopOfStack;
SecCoreData->DataSize = sizeof(EFI_SEC_PEI_HAND_OFF);
SecCoreData->BootFirmwareVolumeBase = (VOID*)BootFirmwareVolumeBase;
SecCoreData->BootFirmwareVolumeSize = PcdGet32 (PcdEmuFirmwareFdSize);
SecCoreData->TemporaryRamBase = (VOID*)(UINTN)LargestRegion;
SecCoreData->TemporaryRamSize = STACK_SIZE;
SecCoreData->StackBase = SecCoreData->TemporaryRamBase;
SecCoreData->StackSize = PeiStackSize;
SecCoreData->PeiTemporaryRamBase = (VOID*) ((UINTN) SecCoreData->TemporaryRamBase + PeiStackSize);
SecCoreData->PeiTemporaryRamSize = STACK_SIZE - PeiStackSize;
//
// Find the SEC Core Entry Point
//
Status = SecPeCoffGetEntryPoint (PeiCorePe32File, (VOID **)&PeiCoreEntryPoint);
if (EFI_ERROR (Status)) {
return ;
}
//
// Transfer control to the SEC Core
//
PeiSwitchStacks (
(SWITCH_STACK_ENTRY_POINT) (UINTN) PeiCoreEntryPoint,
SecCoreData,
(VOID *)gPpiList,
TopOfStack
);
//
// If we get here, then the SEC Core returned. This is an error
//
return ;
}
VOID
SecLoadSecCore (
IN UINTN TemporaryRam,
IN UINTN TemporaryRamSize,
IN VOID *BootFirmwareVolumeBase,
IN UINTN BootFirmwareVolumeSize,
IN VOID *SecCorePe32File
)
/*++
Routine Description:
This is the service to load the SEC Core from the Firmware Volume
Arguments:
TemporaryRam - Memory to use for SEC.
TemporaryRamSize - Size of Memory to use for SEC
BootFirmwareVolumeBase - Start of the Boot FV
SecCorePe32File - SEC Core PE32
Returns:
Success means control is transfered and thus we should never return
--*/
{
EFI_STATUS Status;
VOID *TopOfStack;
VOID *SecCoreEntryPoint;
EFI_SEC_PEI_HAND_OFF *SecCoreData;
UINTN SecStackSize;
//
// Compute Top Of Memory for Stack and PEI Core Allocations
//
SecStackSize = TemporaryRamSize >> 1;
//
// |-----------| <---- TemporaryRamBase + TemporaryRamSize
// | Heap |
// | |
// |-----------| <---- StackBase / PeiTemporaryMemoryBase
// | |
// | Stack |
// |-----------| <---- TemporaryRamBase
//
TopOfStack = (VOID *)(TemporaryRam + SecStackSize);
//
// Reservet space for storing PeiCore's parament in stack.
//
TopOfStack = (VOID *)((UINTN)TopOfStack - sizeof (EFI_SEC_PEI_HAND_OFF) - CPU_STACK_ALIGNMENT);
TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
//
// Bind this information into the SEC hand-off state
//
SecCoreData = (EFI_SEC_PEI_HAND_OFF*)(UINTN)TopOfStack;
SecCoreData->DataSize = sizeof (EFI_SEC_PEI_HAND_OFF);
SecCoreData->BootFirmwareVolumeBase = BootFirmwareVolumeBase;
SecCoreData->BootFirmwareVolumeSize = BootFirmwareVolumeSize;
SecCoreData->TemporaryRamBase = (VOID*)TemporaryRam;
SecCoreData->TemporaryRamSize = TemporaryRamSize;
SecCoreData->StackBase = SecCoreData->TemporaryRamBase;
SecCoreData->StackSize = SecStackSize;
SecCoreData->PeiTemporaryRamBase = (VOID*) ((UINTN) SecCoreData->TemporaryRamBase + SecStackSize);
SecCoreData->PeiTemporaryRamSize = TemporaryRamSize - SecStackSize;
//
// Load the PEI Core from a Firmware Volume
//
Status = SecPeCoffGetEntryPoint (
SecCorePe32File,
&SecCoreEntryPoint
);
if (EFI_ERROR (Status)) {
return ;
}
//
// Transfer control to the SEC Core
//
SwitchStack (
(SWITCH_STACK_ENTRY_POINT)(UINTN)SecCoreEntryPoint,
SecCoreData,
GetThunkPpiList (),
TopOfStack
);
//
// If we get here, then the SEC Core returned. This is an error
//
return ;
}
