1 files changed, 45 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Core/RuntimeDxe/Crc32.c b/roms/edk2/MdeModulePkg/Core/RuntimeDxe/Crc32.c
new file mode 100644
index 000000000..6a4677dab
--- /dev/null
+++ b/roms/edk2/MdeModulePkg/Core/RuntimeDxe/Crc32.c
@@ -0,0 +1,45 @@
+/** @file
+  This file implements CalculateCrc32 Boot Services as defined in
+  Platform Initialization specification 1.0 VOLUME 2 DXE Core Interface.
+
+  This Boot Services is in the Runtime Driver because this service is
+  also required by SetVirtualAddressMap() when the EFI System Table and
+  EFI Runtime Services Table are converted from physical address to
+  virtual addresses.  This requires that the 32-bit CRC be recomputed.
+
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#include <Uefi.h>
+#include <Library/BaseLib.h>
+
+/**
+  Calculate CRC32 for target data.
+
+  @param  Data                  The target data.
+  @param  DataSize              The target data size.
+  @param  CrcOut                The CRC32 for target data.
+
+  @retval EFI_SUCCESS           The CRC32 for target data is calculated successfully.
+  @retval EFI_INVALID_PARAMETER Some parameter is not valid, so the CRC32 is not
+                                calculated.
+
+**/
+EFI_STATUS
+EFIAPI
+RuntimeDriverCalculateCrc32 (
+  IN  VOID    *Data,
+  IN  UINTN   DataSize,
+  OUT UINT32  *CrcOut
+  )
+{
+  if (Data == NULL || DataSize == 0 || CrcOut == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  *CrcOut = CalculateCrc32 (Data, DataSize);
+  return EFI_SUCCESS;
+}