1 files changed, 27 insertions, 0 deletions
diff --git a/ArmPkg/Include/Protocol/ArmScmi.h b/ArmPkg/Include/Protocol/ArmScmi.h
new file mode 100644
index 0000000000..239abb9706
--- /dev/null
+++ b/ArmPkg/Include/Protocol/ArmScmi.h
@@ -0,0 +1,27 @@
+/** @file
+
+  Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+  System Control and Management Interface V1.0
+    http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
+    DEN0056A_System_Control_and_Management_Interface.pdf
+**/
+
+#ifndef ARM_SCMI_H_
+#define ARM_SCMI_H_
+
+/* As per SCMI specification, maximum allowed ASCII string length
+   for various return values/parameters of a SCMI message.
+*/
+#define SCMI_MAX_STR_LEN          16
+
+#endif /* ARM_SCMI_H_ */
+