diff -r 13588c901957 -r 9cf78a70fa4f src/hotspot/cpu/x86/gc/z/zGlobals_x86.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/gc/z/zGlobals_x86.hpp	Thu Oct 17 20:53:35 2019 +0100
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015, 2019, Oracle and/or its affiliates. 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_X86_GC_Z_ZGLOBALS_X86_HPP
+#define CPU_X86_GC_Z_ZGLOBALS_X86_HPP
+
+//
+// Page Allocation Tiers
+// ---------------------
+//
+//  Page Type     Page Size     Object Size Limit     Object Alignment
+//  ------------------------------------------------------------------
+//  Small         2M            <= 265K               <MinObjAlignmentInBytes>
+//  Medium        32M           <= 4M                 4K
+//  Large         X*M           > 4M                  2M
+//  ------------------------------------------------------------------
+//
+const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
+const size_t ZPlatformNMethodDisarmedOffset = 4;
+const size_t ZPlatformCacheLineSize         = 64;
+
+uintptr_t    ZPlatformAddressBase();
+size_t       ZPlatformAddressOffsetBits();
+size_t       ZPlatformAddressMetadataShift();
+
+#endif // CPU_X86_GC_Z_ZGLOBALS_X86_HPP