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

[mirror_edk2.git] / EmbeddedPkg / Library / NvVarStoreFormattedLib / NvVarStoreFormattedLib.c

/** @file\r
  A hook-in library for:\r
  - MdeModulePkg/Universal/Variable/Pei/VariablePei.inf\r
  - MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf\r
  - MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf\r
\r
  Plugging this library instance into one of the above modules makes that\r
  variable service backend wait for another platform module to dynamically\r
  initialize or verify EFI_FIRMWARE_VOLUME_HEADER and VARIABLE_STORE_HEADER in\r
  the non-volatile variable store FVB device. The initialization / verification\r
  is signaled by installing gEdkiiNvVarStoreFormattedGuid into the\r
  phase-matching PPI or protocol database, with a NULL interface. (Note that\r
  installing gEdkiiNvVarStoreFormattedGuid into either the DXE or the MM\r
  protocol database will unblock VariableSmm -- refer to EFI_SECTION_MM_DEPEX\r
  in the PI spec.)\r
\r
  Copyright (C) 2018, Red Hat, Inc.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Base.h>\r
\r
RETURN_STATUS\r
EFIAPI\r
NvVarStoreFormattedInitialize (\r
  VOID\r
  )\r
{\r
  //\r
  // Do nothing, just imbue VariablePei / VariableRuntimeDxe / VariableSmm with\r
  // a PPI or protocol dependency on EDKII_NV_VAR_STORE_FORMATTED_GUID.\r
  //\r
  return RETURN_SUCCESS;\r
}\r