EmulatorPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / EmulatorPkg / Sec / Ia32 / TempRam.c

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