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.

     4  *

     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

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    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

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    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