OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.c

   1 /** @file
   2   OVMF platform customization for EMU Variable FVB driver
   3
   4   Copyright (c) 2009, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "PiDxe.h"
  16 #include <Library/DebugLib.h>
  17 #include <Library/PcdLib.h>
  18 #include <Library/PlatformFvbLib.h>
  19 #include <Library/UefiBootServicesTableLib.h>
  20 #include <Library/UefiRuntimeLib.h>
  21
  22
  23 /**
  24   This function will be called following a call to the
  25   EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL Write function.
  26
  27   @param[in] This     EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL instance.
  28   @param[in] Lba      The starting logical block index to written to.
  29
  30 **/
  31 VOID
  32 EFIAPI
  33 PlatformFvbDataWritten (
  34   IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  35   IN        EFI_LBA                             Lba
  36   )
  37 {
  38   STATIC EFI_EVENT EventToSignal = NULL;
  39
  40   if (!EfiAtRuntime ()) {
  41     if (EventToSignal == NULL) {
  42       EventToSignal = (EFI_EVENT)(UINTN) PcdGet64 (PcdEmuVariableEvent);
  43     }
  44     if (EventToSignal != NULL) {
  45       gBS->SignalEvent (EventToSignal);
  46     }
  47   }
  48 }
  49
  50