OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.c

   1 /** @file
   2   OVMF platform customization for EMU Variable FVB driver
   3
   4   Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "PiDxe.h"
  10 #include <Library/DebugLib.h>
  11 #include <Library/PcdLib.h>
  12 #include <Library/PlatformFvbLib.h>
  13 #include <Library/UefiBootServicesTableLib.h>
  14 #include <Library/UefiRuntimeLib.h>
  15
  16
  17 /**
  18   This function will be called following a call to the
  19   EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Read function.
  20
  21   @param[in] This     The EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
  22   @param[in] Lba      The starting logical block index
  23                       from which to read.
  24   @param[in] Offset   Offset into the block at which to begin reading.
  25   @param[in] NumBytes The number of bytes read.
  26   @param[in] Buffer   Pointer to the buffer that was read, and will be
  27                       returned to the caller.
  28
  29 **/
  30 VOID
  31 EFIAPI
  32 PlatformFvbDataRead (
  33   IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
  34   IN        EFI_LBA                             Lba,
  35   IN        UINTN                               Offset,
  36   IN        UINTN                               NumBytes,
  37   IN        UINT8                               *Buffer
  38   )
  39 {
  40 }
  41
  42
  43 /**
  44   This function will be called following a call to the
  45   EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Write function.
  46
  47   @param[in] This     EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
  48   @param[in] Lba      The starting logical block index to written to.
  49   @param[in] Offset   Offset into the block at which to begin writing.
  50   @param[in] NumBytes The number of bytes written.
  51   @param[in] Buffer   Pointer to the buffer that was written.
  52
  53 **/
  54 VOID
  55 EFIAPI
  56 PlatformFvbDataWritten (
  57   IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
  58   IN        EFI_LBA                             Lba,
  59   IN        UINTN                               Offset,
  60   IN        UINTN                               NumBytes,
  61   IN        UINT8                               *Buffer
  62   )
  63 {
  64   STATIC EFI_EVENT EventToSignal = NULL;
  65
  66   if (!EfiAtRuntime ()) {
  67     if (EventToSignal == NULL) {
  68       EventToSignal = (EFI_EVENT)(UINTN) PcdGet64 (PcdEmuVariableEvent);
  69     }
  70     if (EventToSignal != NULL) {
  71       gBS->SignalEvent (EventToSignal);
  72     }
  73   }
  74 }
  75
  76
  77 /**
  78   This function will be called following a call to the
  79   EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Erase function.
  80
  81   @param This   Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL
  82                 instance.
  83   @param List   The variable argument list as documented for
  84                 the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Erase
  85                 function.
  86
  87 **/
  88 VOID
  89 EFIAPI
  90 PlatformFvbBlocksErased (
  91   IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
  92   IN  VA_LIST       List
  93   )
  94 {
  95 }
  96
  97