1 /*
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 3  * Copyright (c) 2015, 2019, Red Hat Inc. All rights reserved.
 4  * Copyright (c) 2020, 2021, Huawei Technologies Co., Ltd. All rights reserved.
 5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 7  * This code is free software; you can redistribute it and/or modify it
 8  * under the terms of the GNU General Public License version 2 only, as
 9  * published by the Free Software Foundation.
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12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
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26 
27 #ifndef CPU_RISCV_GLOBALS_RISCV_HPP
28 #define CPU_RISCV_GLOBALS_RISCV_HPP
29 
30 #include "utilities/globalDefinitions.hpp"
31 #include "utilities/macros.hpp"
32 
33 // Sets the default values for platform dependent flags used by the runtime system.
34 // (see globals.hpp)
35 
36 define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
37 define_pd_global(bool, TrapBasedNullChecks,      false);
38 define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
39 
40 define_pd_global(uintx, CodeCacheSegmentSize,    64 COMPILER1_AND_COMPILER2_PRESENT(+64)); // Tiered compilation has large code-entry alignment.
41 define_pd_global(intx, CodeEntryAlignment,       64);
42 define_pd_global(intx, OptoLoopAlignment,        16);
43 
44 #define DEFAULT_STACK_YELLOW_PAGES (2)
45 #define DEFAULT_STACK_RED_PAGES (1)
46 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
47 // stack if compiled for unix and LP64. To pass stack overflow tests we need
48 // 20 shadow pages.
49 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
50 #define DEFAULT_STACK_RESERVED_PAGES (1)
51 
52 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
53 #define MIN_STACK_RED_PAGES    DEFAULT_STACK_RED_PAGES
54 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
55 #define MIN_STACK_RESERVED_PAGES (0)
56 
57 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
58 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
59 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
60 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
61 
62 define_pd_global(bool, RewriteBytecodes,     true);
63 define_pd_global(bool, RewriteFrequentPairs, true);
64 
65 define_pd_global(bool, PreserveFramePointer, false);
66 
67 define_pd_global(uintx, TypeProfileLevel, 111);
68 
69 define_pd_global(bool, CompactStrings, true);
70 
71 // Clear short arrays bigger than one word in an arch-specific way
72 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
73 
74 define_pd_global(intx, InlineSmallCode,          1000);
75 
76 #define ARCH_FLAGS(develop,                                             \
77                    product,                                             \
78                    notproduct,                                          \
79                    range,                                               \
80                    constraint)                                          \
81                                                                         \
82   product(bool, NearCpool, true,                                        \
83          "constant pool is close to instructions")                      \
84   product(intx, BlockZeroingLowLimit, 256,                              \
85           "Minimum size in bytes when block zeroing will be used")      \
86           range(1, max_jint)                                            \
87   product(bool, TraceTraps, false, "Trace all traps the signal handler")\
88   product(bool, UseConservativeFence, true,                             \
89           "Extend i for r and o for w in the pred/succ flags of fence;" \
90           "Extend fence.i to fence.i + fence.")                         \
91   product(bool, UseVExt, false, "Use RVV instructions")                 \
92   product(bool, AvoidUnalignedAccesses, true,                           \
93           "Avoid generating unaligned memory accesses")                 \
94 
95 #endif // CPU_RISCV_GLOBALS_RISCV_HPP