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diff --git a/MdePkg/Include/Library/ArmSvcLib.h b/MdePkg/Include/Library/ArmSvcLib.h
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index 0000000..a514e0c
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+++ b/MdePkg/Include/Library/ArmSvcLib.h
@@ -0,0 +1,56 @@
+/** @file
+*
+*  Copyright (c) 2016 - 2017, ARM Limited. All rights reserved.
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#ifndef ARM_SVC_LIB_H_
+#define ARM_SVC_LIB_H_
+
+/**
+ * The size of the SVC arguments are different between AArch64 and AArch32.
+ * The native size is used for the arguments.
+ */
+typedef struct {
+  UINTN    Arg0;
+  UINTN    Arg1;
+  UINTN    Arg2;
+  UINTN    Arg3;
+  UINTN    Arg4;
+  UINTN    Arg5;
+  UINTN    Arg6;
+  UINTN    Arg7;
+  UINTN    Arg8;
+  UINTN    Arg9;
+  UINTN    Arg10;
+  UINTN    Arg11;
+  UINTN    Arg12;
+  UINTN    Arg13;
+  UINTN    Arg14;
+  UINTN    Arg15;
+  UINTN    Arg16;
+  UINTN    Arg17;
+} ARM_SVC_ARGS;
+
+/**
+  Trigger an SVC call
+
+  SVC calls can take up to 8 arguments and return up to 8 return values.
+  Therefore, the 8 first fields in the ARM_SVC_ARGS structure are used
+  for both input and output values.
+
+  @param[in, out]    Args Arguments to be passed as part of the SVC call
+                     The return values of the SVC call are also placed
+                     in the same structure
+
+  @retval None
+
+**/
+VOID
+ArmCallSvc (
+  IN OUT ARM_SVC_ARGS  *Args
+  );
+
+#endif // ARM_SVC_LIB_H_