1 files changed, 21 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Include/Protocol/ArmScmi.h b/roms/edk2/ArmPkg/Include/Protocol/ArmScmi.h
new file mode 100644
index 000000000..aedea8f61
--- /dev/null
+++ b/roms/edk2/ArmPkg/Include/Protocol/ArmScmi.h
@@ -0,0 +1,21 @@
+/** @file
+
+  Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  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_ */
+