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 #if defined(COMPILER2) || INCLUDE_JVMCI 43 define_pd_global(intx, CodeEntryAlignment, 64); 44 #else 45 define_pd_global(intx, CodeEntryAlignment, 16); 46 #endif // COMPILER2 47 define_pd_global(intx, OptoLoopAlignment, 16); 48 define_pd_global(intx, InlineFrequencyCount, 100); 49 50 #define DEFAULT_STACK_YELLOW_PAGES (2) 51 #define DEFAULT_STACK_RED_PAGES (1) 52 #define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5)) 53 #define DEFAULT_STACK_RESERVED_PAGES (0) 54 55 #define MIN_STACK_YELLOW_PAGES 1 56 #define MIN_STACK_RED_PAGES 1 57 #define MIN_STACK_SHADOW_PAGES 1 58 #define MIN_STACK_RESERVED_PAGES (0) 59 60 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); 61 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); 62 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); 63 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); 64 65 define_pd_global(bool, RewriteBytecodes, true); 66 define_pd_global(bool, RewriteFrequentPairs, true); 67 68 define_pd_global(bool, UseMembar, true); 69 70 define_pd_global(bool, PreserveFramePointer, false); 71 72 // GC Ergo Flags 73 define_pd_global(uintx, CMSYoungGenPerWorker, 64*M); // default max size of CMS young gen, per GC worker thread 74 75 define_pd_global(uintx, TypeProfileLevel, 111); 76 77 // No performance work done here yet. 78 define_pd_global(bool, CompactStrings, false); 79 80 // avoid biased locking while we are bootstrapping the aarch64 build 81 define_pd_global(bool, UseBiasedLocking, false); 82 83 #if defined(COMPILER1) || defined(COMPILER2) 84 define_pd_global(intx, InlineSmallCode, 1000); 85 #endif 86 87 #ifdef BUILTIN_SIM 88 #define UseBuiltinSim true 89 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 90 \ 91 product(bool, NotifySimulator, UseBuiltinSim, \ 92 "tell the AArch64 sim where we are in method code") \ 93 \ 94 product(bool, UseSimulatorCache, false, \ 95 "tell sim to cache memory updates until exclusive op occurs") \ 96 \ 97 product(bool, DisableBCCheck, true, \ 98 "tell sim not to invoke bccheck callback") \ 99 \ 100 product(bool, NearCpool, true, \ 101 "constant pool is close to instructions") \ 102 \ 103 product(bool, UseBarriersForVolatile, false, \ 104 "Use memory barriers to implement volatile accesses") \ 105 \ 106 product(bool, UseCRC32, false, \ 107 "Use CRC32 instructions for CRC32 computation") \ 108 109 // Don't attempt to use Neon on builtin sim until builtin sim supports it 110 #define UseCRC32 false 111 112 #else 113 #define UseBuiltinSim false 114 #define NotifySimulator false 115 #define UseSimulatorCache false 116 #define DisableBCCheck true 117 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \ 118 \ 119 product(bool, NearCpool, true, \ 120 "constant pool is close to instructions") \ 121 \ 122 product(bool, UseBarriersForVolatile, false, \ 123 "Use memory barriers to implement volatile accesses") \ 124 product(bool, UseNeon, false, \ 125 "Use Neon for CRC32 computation") \ 126 product(bool, UseCRC32, false, \ 127 "Use CRC32 instructions for CRC32 computation") \ 128 product(bool, TraceTraps, false, "Trace all traps the signal handler") 129 130 #endif 131 132 133 #endif // CPU_AARCH64_VM_GLOBALS_AARCH64_HPP