1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
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  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  23 
  24 #ifndef CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP
  25 #define CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP
  26 
  27 //
  28 // Page Allocation Tiers
  29 // ---------------------
  30 //
  31 //  Page Type     Page Size     Object Size Limit     Object Alignment
  32 //  ------------------------------------------------------------------
  33 //  Small         2M            <= 265K               <MinObjAlignmentInBytes>
  34 //  Medium        32M           <= 4M                 4K
  35 //  Large         X*M           > 4M                  2M
  36 //  ------------------------------------------------------------------
  37 //
  38 const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
  39 const size_t ZPlatformMaxHeapSizeShift      = 46; // 16TB
  40 const size_t ZPlatformNMethodDisarmedOffset = 4;
  41 const size_t ZPlatformCacheLineSize         = 64;
  42 
  43 uintptr_t    ZPlatformAddressSpaceStart();
  44 uintptr_t    ZPlatformAddressSpaceEnd();
  45 uintptr_t    ZPlatformAddressReservedStart();
  46 uintptr_t    ZPlatformAddressReservedEnd();
  47 uintptr_t    ZPlatformAddressBase();
  48 size_t       ZPlatformAddressOffsetBits();
  49 size_t       ZPlatformAddressMetadataShift();
  50 
  51 #endif // CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP