| /*++ @file | |
| Temp RAM PPI | |
| Copyright (c) 2011, Apple Inc. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include <PiPei.h> | |
| #include <Library/DebugLib.h> | |
| #include <Library/BaseMemoryLib.h> | |
| #include <Ppi/TemporaryRamSupport.h> | |
| VOID | |
| EFIAPI | |
| SecSwitchStack ( | |
| UINT32 TemporaryMemoryBase, | |
| UINT32 PermenentMemoryBase | |
| ); | |
| EFI_STATUS | |
| EFIAPI | |
| SecTemporaryRamSupport ( | |
| IN CONST EFI_PEI_SERVICES **PeiServices, | |
| IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
| IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
| IN UINTN CopySize | |
| ) | |
| { | |
| // | |
| // Migrate the whole temporary memory to permanent memory. | |
| // | |
| CopyMem ( | |
| (VOID *)(UINTN)PermanentMemoryBase, | |
| (VOID *)(UINTN)TemporaryMemoryBase, | |
| CopySize | |
| ); | |
| // | |
| // 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)TemporaryMemoryBase, (UINT32)PermanentMemoryBase); | |
| // | |
| // We need *not* fix the return address because currently, | |
| // The PeiCore is executed in flash. | |
| // | |
| // | |
| // Simulate to invalid temporary memory, terminate temporary memory | |
| // | |
| // ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize); | |
| return EFI_SUCCESS; | |
| } |