--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os_cpu/linux_x86/gc/z/zGlobals_linux_x86.hpp Tue Jun 12 17:40:28 2018 +0200
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, 2018, 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 OS_CPU_LINUX_X86_ZGLOBALS_LINUX_X86_HPP
+#define OS_CPU_LINUX_X86_ZGLOBALS_LINUX_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
+// ------------------------------------------------------------------
+//
+//
+// Address Space & Pointer Layout
+// ------------------------------
+//
+// +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+// . .
+// . .
+// . .
+// +--------------------------------+ 0x0000140000000000 (20TB)
+// | Remapped View |
+// +--------------------------------+ 0x0000100000000000 (16TB)
+// | (Reserved, but unused) |
+// +--------------------------------+ 0x00000c0000000000 (12TB)
+// | Marked1 View |
+// +--------------------------------+ 0x0000080000000000 (8TB)
+// | Marked0 View |
+// +--------------------------------+ 0x0000040000000000 (4TB)
+// . .
+// +--------------------------------+ 0x0000000000000000
+//
+//
+// 6 4 4 4 4 4 0
+// 3 7 6 5 2 1 0
+// +-------------------+-+----+-----------------------------------------------+
+// |00000000 00000000 0|0|1111|11 11111111 11111111 11111111 11111111 11111111|
+// +-------------------+-+----+-----------------------------------------------+
+// | | | |
+// | | | * 41-0 Object Offset (42-bits, 4TB address space)
+// | | |
+// | | * 45-42 Metadata Bits (4-bits) 0001 = Marked0 (Address view 4-8TB)
+// | | 0010 = Marked1 (Address view 8-12TB)
+// | | 0100 = Remapped (Address view 16-20TB)
+// | | 1000 = Finalizable (Address view N/A)
+// | |
+// | * 46-46 Unused (1-bit, always zero)
+// |
+// * 63-47 Fixed (17-bits, always zero)
+//
+
+const size_t ZPlatformPageSizeSmallShift = 21; // 2M
+
+const size_t ZPlatformAddressOffsetBits = 42; // 4TB
+
+const uintptr_t ZPlatformAddressMetadataShift = ZPlatformAddressOffsetBits;
+
+const uintptr_t ZPlatformAddressSpaceStart = (uintptr_t)1 << ZPlatformAddressOffsetBits;
+const uintptr_t ZPlatformAddressSpaceSize = ((uintptr_t)1 << ZPlatformAddressOffsetBits) * 4;
+
+const size_t ZPlatformCacheLineSize = 64;
+
+#endif // OS_CPU_LINUX_X86_ZGLOBALS_LINUX_X86_HPP