| /* |
| * 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 |
