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1 /* |
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2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 #ifndef OS_CPU_LINUX_X86_ZGLOBALS_LINUX_X86_HPP |
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25 #define OS_CPU_LINUX_X86_ZGLOBALS_LINUX_X86_HPP |
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26 |
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27 // |
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28 // Page Allocation Tiers |
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29 // --------------------- |
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30 // |
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31 // Page Type Page Size Object Size Limit Object Alignment |
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32 // ------------------------------------------------------------------ |
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33 // Small 2M <= 265K <MinObjAlignmentInBytes> |
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34 // Medium 32M <= 4M 4K |
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35 // Large X*M > 4M 2M |
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36 // ------------------------------------------------------------------ |
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37 // |
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38 // |
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39 // Address Space & Pointer Layout |
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40 // ------------------------------ |
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41 // |
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42 // +--------------------------------+ 0x00007FFFFFFFFFFF (127TB) |
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43 // . . |
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44 // . . |
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45 // . . |
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46 // +--------------------------------+ 0x0000140000000000 (20TB) |
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47 // | Remapped View | |
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48 // +--------------------------------+ 0x0000100000000000 (16TB) |
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49 // | (Reserved, but unused) | |
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50 // +--------------------------------+ 0x00000c0000000000 (12TB) |
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51 // | Marked1 View | |
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52 // +--------------------------------+ 0x0000080000000000 (8TB) |
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53 // | Marked0 View | |
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54 // +--------------------------------+ 0x0000040000000000 (4TB) |
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55 // . . |
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56 // +--------------------------------+ 0x0000000000000000 |
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57 // |
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58 // |
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59 // 6 4 4 4 4 4 0 |
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60 // 3 7 6 5 2 1 0 |
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61 // +-------------------+-+----+-----------------------------------------------+ |
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62 // |00000000 00000000 0|0|1111|11 11111111 11111111 11111111 11111111 11111111| |
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63 // +-------------------+-+----+-----------------------------------------------+ |
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64 // | | | | |
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65 // | | | * 41-0 Object Offset (42-bits, 4TB address space) |
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66 // | | | |
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67 // | | * 45-42 Metadata Bits (4-bits) 0001 = Marked0 (Address view 4-8TB) |
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68 // | | 0010 = Marked1 (Address view 8-12TB) |
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69 // | | 0100 = Remapped (Address view 16-20TB) |
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70 // | | 1000 = Finalizable (Address view N/A) |
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71 // | | |
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72 // | * 46-46 Unused (1-bit, always zero) |
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73 // | |
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74 // * 63-47 Fixed (17-bits, always zero) |
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75 // |
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76 |
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77 const size_t ZPlatformPageSizeSmallShift = 21; // 2M |
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78 |
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79 const size_t ZPlatformAddressOffsetBits = 42; // 4TB |
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80 |
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81 const uintptr_t ZPlatformAddressMetadataShift = ZPlatformAddressOffsetBits; |
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82 |
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83 const uintptr_t ZPlatformAddressSpaceStart = (uintptr_t)1 << ZPlatformAddressOffsetBits; |
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84 const uintptr_t ZPlatformAddressSpaceSize = ((uintptr_t)1 << ZPlatformAddressOffsetBits) * 4; |
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85 |
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86 const size_t ZPlatformCacheLineSize = 64; |
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87 |
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88 #endif // OS_CPU_LINUX_X86_ZGLOBALS_LINUX_X86_HPP |