MdeModulePkg/Library/DxeCapsuleLibNull/DxeCapsuleLibNull.c

   1 /** @file
   2   Null Dxe Capsule Library instance does nothing and returns unsupport status.
   3
   4 Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8 #include <Uefi.h>
   9 #include <Library/CapsuleLib.h>
  10
  11 /**
  12   The firmware checks whether the capsule image is supported
  13   by the CapsuleGuid in CapsuleHeader or other specific information in capsule image.
  14
  15   Caution: This function may receive untrusted input.
  16
  17   @param  CapsuleHeader    Point to the UEFI capsule image to be checked.
  18
  19   @retval EFI_UNSUPPORTED  Input capsule is not supported by the firmware.
  20 **/
  21 EFI_STATUS
  22 EFIAPI
  23 SupportCapsuleImage (
  24   IN EFI_CAPSULE_HEADER *CapsuleHeader
  25   )
  26 {
  27   return EFI_UNSUPPORTED;
  28 }
  29
  30 /**
  31   The firmware specific implementation processes the capsule image
  32   if it recognized the format of this capsule image.
  33
  34   Caution: This function may receive untrusted input.
  35
  36   @param  CapsuleHeader    Point to the UEFI capsule image to be processed.
  37
  38   @retval EFI_UNSUPPORTED  Capsule image is not supported by the firmware.
  39 **/
  40 EFI_STATUS
  41 EFIAPI
  42 ProcessCapsuleImage (
  43   IN EFI_CAPSULE_HEADER *CapsuleHeader
  44   )
  45 {
  46   return EFI_UNSUPPORTED;
  47 }
  48
  49 /**
  50
  51   This routine is called to process capsules.
  52
  53   Caution: This function may receive untrusted input.
  54
  55   The capsules reported in EFI_HOB_UEFI_CAPSULE are processed.
  56   If there is no EFI_HOB_UEFI_CAPSULE, this routine does nothing.
  57
  58   This routine should be called twice in BDS.
  59   1) The first call must be before EndOfDxe. The system capsules is processed.
  60      If device capsule FMP protocols are exposted at this time and device FMP
  61      capsule has zero EmbeddedDriverCount, the device capsules are processed.
  62      Each individual capsule result is recorded in capsule record variable.
  63      System may reset in this function, if reset is required by capsule and
  64      all capsules are processed.
  65      If not all capsules are processed, reset will be defered to second call.
  66
  67   2) The second call must be after EndOfDxe and after ConnectAll, so that all
  68      device capsule FMP protocols are exposed.
  69      The system capsules are skipped. If the device capsules are NOT processed
  70      in first call, they are processed here.
  71      Each individual capsule result is recorded in capsule record variable.
  72      System may reset in this function, if reset is required by capsule
  73      processed in first call and second call.
  74
  75   @retval EFI_SUCCESS             There is no error when processing capsules.
  76   @retval EFI_OUT_OF_RESOURCES    No enough resource to process capsules.
  77
  78 **/
  79 EFI_STATUS
  80 EFIAPI
  81 ProcessCapsules (
  82   VOID
  83   )
  84 {
  85   return EFI_UNSUPPORTED;
  86 }
  87