1 /* 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_AARCH64_VM_GLOBALS_AARCH64_HPP 27 #define CPU_AARCH64_VM_GLOBALS_AARCH64_HPP 28 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/macros.hpp" 31 32 // Sets the default values for platform dependent flags used by the runtime system. 33 // (see globals.hpp) 34 35 define_pd_global(bool, ShareVtableStubs, true); 36 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this 37 38 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 39 define_pd_global(bool, TrapBasedNullChecks, false); 40 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast 41 42 define_pd_global(intx, CodeEntryAlignment, 64); 43 define_pd_global(intx, OptoLoopAlignment, 16); 44 define_pd_global(intx, InlineFrequencyCount, 100); 45 46 #define DEFAULT_STACK_YELLOW_PAGES (2) 47 #define DEFAULT_STACK_RED_PAGES (1) 48 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) 49 #define DEFAULT_STACK_RESERVED_PAGES (0) 50 51 #define MIN_STACK_YELLOW_PAGES 1 52 #define MIN_STACK_RED_PAGES 1 53 #define MIN_STACK_SHADOW_PAGES 1 54 #define MIN_STACK_RESERVED_PAGES (0) 55 56 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 57 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 58 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 59 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 60 61 define_pd_global(bool, RewriteBytecodes, true); 62 define_pd_global(bool, RewriteFrequentPairs, true); 63 64 define_pd_global(bool, UseMembar, true); 65 66 define_pd_global(bool, PreserveFramePointer, false); 67 68 // GC Ergo Flags 69 define_pd_global(uintx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 70 71 define_pd_global(uintx, TypeProfileLevel, 111); 72 73 // No performance work done here yet. 74 define_pd_global(bool, CompactStrings, false); 75 76 // avoid biased locking while we are bootstrapping the aarch64 build 77 define_pd_global(bool, UseBiasedLocking, false); 78 79 define_pd_global(intx, InitArrayShortSize, 18*BytesPerLong); 80 81 #if defined(COMPILER1) || defined(COMPILER2) 82 define_pd_global(intx, InlineSmallCode, 1000); 83 #endif 84 85 #ifdef BUILTIN_SIM 86 #define UseBuiltinSim true 87 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 88 \ 89 product(bool, NotifySimulator, UseBuiltinSim, \ 90 "tell the AArch64 sim where we are in method code") \ 91 \ 92 product(bool, UseSimulatorCache, false, \ 93 "tell sim to cache memory updates until exclusive op occurs") \ 94 \ 95 product(bool, DisableBCCheck, true, \ 96 "tell sim not to invoke bccheck callback") \ 97 \ 98 product(bool, NearCpool, true, \ 99 "constant pool is close to instructions") \ 100 \ 101 product(bool, UseBarriersForVolatile, false, \ 102 "Use memory barriers to implement volatile accesses") \ 103 \ 104 product(bool, UseCRC32, false, \ 105 "Use CRC32 instructions for CRC32 computation") \ 106 107 // Don't attempt to use Neon on builtin sim until builtin sim supports it 108 #define UseCRC32 false 109 110 #else 111 #define UseBuiltinSim false 112 #define NotifySimulator false 113 #define UseSimulatorCache false 114 #define DisableBCCheck true 115 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 116 \ 117 product(bool, NearCpool, true, \ 118 "constant pool is close to instructions") \ 119 \ 120 product(bool, UseBarriersForVolatile, false, \ 121 "Use memory barriers to implement volatile accesses") \ 122 product(bool, UseNeon, false, \ 123 "Use Neon for CRC32 computation") \ 124 product(bool, UseCRC32, false, \ 125 "Use CRC32 instructions for CRC32 computation") \ 126 product(bool, TraceTraps, false, "Trace all traps the signal handler") 127 128 #endif 129 130 131 #endif // CPU_AARCH64_VM_GLOBALS_AARCH64_HPP