MdeModulePkg/Core/RuntimeDxe/Crc32.c

   1 /** @file
   2   This file implements CalculateCrc32 Boot Services as defined in
   3   Platform Initialization specification 1.0 VOLUME 2 DXE Core Interface.
   4
   5   This Boot Services is in the Runtime Driver because this service is
   6   also required by SetVirtualAddressMap() when the EFI System Table and
   7   EFI Runtime Services Table are converted from physical address to
   8   virtual addresses.  This requires that the 32-bit CRC be recomputed.
   9
  10 Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
  11 SPDX-License-Identifier: BSD-2-Clause-Patent
  12
  13 **/
  14
  15
  16 #include <Uefi.h>
  17 #include <Library/BaseLib.h>
  18
  19 /**
  20   Calculate CRC32 for target data.
  21
  22   @param  Data                  The target data.
  23   @param  DataSize              The target data size.
  24   @param  CrcOut                The CRC32 for target data.
  25
  26   @retval EFI_SUCCESS           The CRC32 for target data is calculated successfully.
  27   @retval EFI_INVALID_PARAMETER Some parameter is not valid, so the CRC32 is not
  28                                 calculated.
  29
  30 **/
  31 EFI_STATUS
  32 EFIAPI
  33 RuntimeDriverCalculateCrc32 (
  34   IN  VOID    *Data,
  35   IN  UINTN   DataSize,
  36   OUT UINT32  *CrcOut
  37   )
  38 {
  39   if (Data == NULL || DataSize == 0 || CrcOut == NULL) {
  40     return EFI_INVALID_PARAMETER;
  41   }
  42
  43   *CrcOut = CalculateCrc32 (Data, DataSize);
  44   return EFI_SUCCESS;
  45 }