OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceSmm.c

   1 /**@file
   2   Functions related to the Firmware Volume Block service whose
   3   implementation is specific to the SMM driver build.
   4
   5   Copyright (C) 2015, Red Hat, Inc.
   6   Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
   7
   8   This program and the accompanying materials are licensed and made available
   9   under the terms and conditions of the BSD License which accompanies this
  10   distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 **/
  16
  17 #include <Library/DebugLib.h>
  18 #include <Library/PcdLib.h>
  19 #include <Library/SmmServicesTableLib.h>
  20 #include <Protocol/DevicePath.h>
  21 #include <Protocol/SmmFirmwareVolumeBlock.h>
  22
  23 #include "FwBlockService.h"
  24
  25 VOID
  26 InstallProtocolInterfaces (
  27   IN EFI_FW_VOL_BLOCK_DEVICE *FvbDevice
  28   )
  29 {
  30   EFI_HANDLE FvbHandle;
  31   EFI_STATUS Status;
  32
  33   ASSERT (FeaturePcdGet (PcdSmmSmramRequire));
  34
  35   //
  36   // There is no SMM service that can install multiple protocols in the SMM
  37   // protocol database in one go.
  38   //
  39   // The SMM Firmware Volume Block protocol structure is the same as the
  40   // Firmware Volume Block protocol structure.
  41   //
  42   FvbHandle = NULL;
  43   DEBUG ((EFI_D_INFO, "Installing QEMU flash SMM FVB\n"));
  44   Status = gSmst->SmmInstallProtocolInterface (
  45                     &FvbHandle,
  46                     &gEfiSmmFirmwareVolumeBlockProtocolGuid,
  47                     EFI_NATIVE_INTERFACE,
  48                     &FvbDevice->FwVolBlockInstance
  49                     );
  50   ASSERT_EFI_ERROR (Status);
  51
  52   Status = gSmst->SmmInstallProtocolInterface (
  53                     &FvbHandle,
  54                     &gEfiDevicePathProtocolGuid,
  55                     EFI_NATIVE_INTERFACE,
  56                     FvbDevice->DevicePath
  57                     );
  58   ASSERT_EFI_ERROR (Status);
  59 }
  60
  61 VOID
  62 InstallVirtualAddressChangeHandler (
  63   VOID
  64   )
  65 {
  66   //
  67   // Nothing.
  68   //
  69 }
  70
  71 EFI_STATUS
  72 MarkIoMemoryRangeForRuntimeAccess (
  73   IN EFI_PHYSICAL_ADDRESS                BaseAddress,
  74   IN UINTN                               Length
  75   )
  76 {
  77   //
  78   // Nothing
  79   //
  80
  81   return EFI_SUCCESS;
  82 }