UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / Ia32 / Semaphore.c

/** @file\r
Semaphore mechanism to indicate to the BSP that an AP has exited SMM\r
after SMBASE relocation.\r
\r
Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "PiSmmCpuDxeSmm.h"\r
\r
UINTN             mSmmRelocationOriginalAddress;\r
volatile BOOLEAN  *mRebasedFlag;\r
\r
/**\r
  Hook return address of SMM Save State so that semaphore code\r
  can be executed immediately after AP exits SMM to indicate to\r
  the BSP that an AP has exited SMM after SMBASE relocation.\r
\r
  @param[in] CpuIndex     The processor index.\r
  @param[in] RebasedFlag  A pointer to a flag that is set to TRUE\r
                          immediately after AP exits SMM.\r
\r
**/\r
VOID\r
SemaphoreHook (\r
  IN UINTN             CpuIndex,\r
  IN volatile BOOLEAN  *RebasedFlag\r
  )\r
{\r
  SMRAM_SAVE_STATE_MAP  *CpuState;\r
\r
  mRebasedFlag = RebasedFlag;\r
\r
  CpuState                      = (SMRAM_SAVE_STATE_MAP *)(UINTN)(SMM_DEFAULT_SMBASE + SMRAM_SAVE_STATE_MAP_OFFSET);\r
  mSmmRelocationOriginalAddress = (UINTN)HookReturnFromSmm (\r
                                           CpuIndex,\r
                                           CpuState,\r
                                           (UINT64)(UINTN)&SmmRelocationSemaphoreComplete,\r
                                           (UINT64)(UINTN)&SmmRelocationSemaphoreComplete\r
                                           );\r
}\r