--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/s390/icache_s390.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_S390_VM_ICACHE_S390_HPP
+#define CPU_S390_VM_ICACHE_S390_HPP
+
+// Interface for updating the instruction cache.  Whenever the VM modifies
+// code, part of the processor instruction cache potentially has to be flushed.
+
+class ICache : public AbstractICache {
+ public:
+  enum {
+    stub_size      = 0,   // Size of the icache flush stub in bytes.
+    line_size      = 2,   // There is no explicit flushing on z/Architecture.
+                          // This value is ignored by the flush stub (a nop !).
+    log2_line_size = 1
+  };
+
+  // Use default implementation.
+};
+
+#endif // CPU_S390_VM_ICACHE_S390_HPP