1 /*
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   3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
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  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
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  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
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  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, ConvertSleepToYield,      true);
  36 define_pd_global(bool, ShareVtableStubs,         true);
  37 define_pd_global(bool, CountInterpCalls,         true);
  38 define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
  39 
  40 define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
  41 define_pd_global(bool, TrapBasedNullChecks,  false);
  42 define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
  43 
  44 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't
  45 // assign a different value for C2 without touching a number of files. Use
  46 // #ifdef to minimize the change as it's late in Mantis. -- FIXME.
  47 // c1 doesn't have this problem because the fix to 4858033 assures us
  48 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns
  49 // the uep and the vep doesn't get real alignment but just slops on by
  50 // only assured that the entry instruction meets the 5 byte size requirement.
  51 #ifdef COMPILER2
  52 define_pd_global(intx, CodeEntryAlignment,       64);
  53 #else
  54 define_pd_global(intx, CodeEntryAlignment,       16);
  55 #endif // COMPILER2
  56 define_pd_global(intx, OptoLoopAlignment,        16);
  57 define_pd_global(intx, InlineFrequencyCount,     100);
  58 
  59 define_pd_global(intx, StackYellowPages, 2);
  60 define_pd_global(intx, StackRedPages, 1);
  61 
  62 define_pd_global(intx, StackShadowPages, 4 DEBUG_ONLY(+5));
  63 
  64 define_pd_global(intx, PreInflateSpin,           10);
  65 
  66 define_pd_global(bool, RewriteBytecodes,     true);
  67 define_pd_global(bool, RewriteFrequentPairs, false);
  68 
  69 define_pd_global(bool, UseMembar,            true);
  70 
  71 // GC Ergo Flags
  72 define_pd_global(uintx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread
  73 
  74 define_pd_global(uintx, TypeProfileLevel, 111);
  75 
  76 // avoid biased locking while we are bootstrapping the aarch64 build
  77 define_pd_global(bool, UseBiasedLocking, false);
  78 
  79 #if defined(COMPILER1) || defined(COMPILER2)
  80 define_pd_global(intx, InlineSmallCode,          1000);
  81 #endif
  82 
  83 #ifdef BUILTIN_SIM
  84 #define UseBuiltinSim           true
  85 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
  86                                                                         \
  87   product(bool, NotifySimulator, UseBuiltinSim,                         \
  88          "tell the AArch64 sim where we are in method code")            \
  89                                                                         \
  90   product(bool, UseSimulatorCache, false,                               \
  91          "tell sim to cache memory updates until exclusive op occurs")  \
  92                                                                         \
  93   product(bool, DisableBCCheck, true,                                   \
  94           "tell sim not to invoke bccheck callback")                    \
  95                                                                         \
  96   product(bool, NearCpool, true,                                        \
  97          "constant pool is close to instructions")                      \
  98                                                                         \
  99   product(bool, UseBarriersForVolatile, false,                          \
 100           "Use memory barriers to implement volatile accesses")         \
 101                                                                         \
 102   product(bool, UseCRC32, false,                                        \
 103           "Use CRC32 instructions for CRC32 computation")               \
 104 
 105 // Don't attempt to use Neon on builtin sim until builtin sim supports it
 106 #define UseCRC32 false
 107 
 108 #else
 109 #define UseBuiltinSim           false
 110 #define NotifySimulator         false
 111 #define UseSimulatorCache       false
 112 #define DisableBCCheck          true
 113 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
 114                                                                         \
 115   product(bool, NearCpool, true,                                        \
 116          "constant pool is close to instructions")                      \
 117                                                                         \
 118   product(bool, UseBarriersForVolatile, false,                          \
 119           "Use memory barriers to implement volatile accesses")         \
 120   product(bool, UseNeon, false,                                         \
 121           "Use Neon for CRC32 computation")                             \
 122   product(bool, UseCRC32, false,                                        \
 123           "Use CRC32 instructions for CRC32 computation")               \
 124   product(bool, TraceTraps, false, "Trace all traps the signal handler")
 125 
 126 #endif
 127 
 128 
 129 #endif // CPU_AARCH64_VM_GLOBALS_AARCH64_HPP