1 /*
   2  * Copyright (c) 2008, 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 
  25 #ifndef CPU_ARM_GLOBALS_ARM_HPP
  26 #define CPU_ARM_GLOBALS_ARM_HPP
  27 
  28 //
  29 // Sets the default values for platform dependent flags used by the runtime system.
  30 // (see globals.hpp)
  31 //
  32 
  33 define_pd_global(bool,  ShareVtableStubs,         true);
  34 
  35 define_pd_global(bool,  ImplicitNullChecks,       true);  // Generate code for implicit null checks
  36 define_pd_global(bool,  UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
  37 define_pd_global(bool,  TrapBasedNullChecks,      false); // Not needed
  38 
  39 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
  40 define_pd_global(intx,  CodeEntryAlignment,       16);
  41 define_pd_global(intx,  OptoLoopAlignment,        16);
  42 
  43 #define DEFAULT_STACK_YELLOW_PAGES (2)
  44 #define DEFAULT_STACK_RED_PAGES (1)
  45 #define DEFAULT_STACK_SHADOW_PAGES (5 DEBUG_ONLY(+1))
  46 #define DEFAULT_STACK_RESERVED_PAGES (0)
  47 
  48 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
  49 #define MIN_STACK_RED_PAGES    DEFAULT_STACK_RED_PAGES
  50 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
  51 #define MIN_STACK_RESERVED_PAGES (0)
  52 
  53 define_pd_global(intx,  StackYellowPages,         DEFAULT_STACK_YELLOW_PAGES);
  54 define_pd_global(intx,  StackRedPages,            DEFAULT_STACK_RED_PAGES);
  55 define_pd_global(intx,  StackShadowPages,         DEFAULT_STACK_SHADOW_PAGES);
  56 define_pd_global(intx,  StackReservedPages,       DEFAULT_STACK_RESERVED_PAGES);
  57 
  58 define_pd_global(intx,  InlineFrequencyCount,     50);
  59 #if  defined(COMPILER1) || defined(COMPILER2)
  60 define_pd_global(intx,  InlineSmallCode,          1500);
  61 #endif
  62 
  63 define_pd_global(bool,  RewriteBytecodes,         true);
  64 define_pd_global(bool,  RewriteFrequentPairs,     true);
  65 
  66 define_pd_global(bool,  PreserveFramePointer,     false);
  67 
  68 // GC Ergo Flags
  69 define_pd_global(size_t, CMSYoungGenPerWorker,    16*M);  // default max size of CMS young gen, per GC worker thread
  70 
  71 define_pd_global(uintx, TypeProfileLevel, 0);
  72 
  73 // No performance work done here yet.
  74 define_pd_global(bool, CompactStrings, false);
  75 
  76 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
  77 
  78 define_pd_global(bool, ThreadLocalHandshakes, false);
  79 
  80 #define ARCH_FLAGS(develop, \
  81                    product, \
  82                    diagnostic, \
  83                    experimental, \
  84                    notproduct, \
  85                    range, \
  86                    constraint, \
  87                    writeable)
  88 #endif // CPU_ARM_GLOBALS_ARM_HPP