1 /*
2 * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020, 2023, Huawei Technologies Co., Ltd. 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.
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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
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24 */
25
26 #ifndef CPU_RISCV_GLOBALS_RISCV_HPP
27 #define CPU_RISCV_GLOBALS_RISCV_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, ImplicitNullChecks, true); // Generate code for implicit null checks
36 define_pd_global(bool, TrapBasedNullChecks, false);
37 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap nulls past to check cast
38
39 define_pd_global(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI);
40
41 define_pd_global(size_t, CodeCacheSegmentSize, 64 COMPILER1_AND_COMPILER2_PRESENT(+64)); // Tiered compilation has large code-entry alignment.
42 define_pd_global(uint, CodeEntryAlignment, 64);
43 define_pd_global(intx, OptoLoopAlignment, 16);
44
45 #define DEFAULT_STACK_YELLOW_PAGES (2)
46 #define DEFAULT_STACK_RED_PAGES (1)
47 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
48 // stack if compiled for unix and LP64. To pass stack overflow tests we need
49 // 20 shadow pages.
50 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
51 #define DEFAULT_STACK_RESERVED_PAGES (1)
52
53 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
54 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
55 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
56 #define MIN_STACK_RESERVED_PAGES (0)
57
58 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
59 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
60 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
61 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
62
63 define_pd_global(bool, VMContinuations, true);
64
65 define_pd_global(bool, RewriteBytecodes, true);
66 define_pd_global(bool, RewriteFrequentPairs, true);
67
68 define_pd_global(bool, PreserveFramePointer, false);
69
70 define_pd_global(uintx, TypeProfileLevel, 111);
71
72 define_pd_global(bool, CompactStrings, true);
73
74 // Clear short arrays bigger than one word in an arch-specific way
75 define_pd_global(intx, InitArrayShortSize, BytesPerLong);
76
77 define_pd_global(intx, InlineSmallCode, 1000);
78
79 #define ARCH_FLAGS(develop, \
80 product, \
81 range, \
82 constraint) \
83 \
84 product(bool, UseBlockZeroing, false, \
85 "Use Zicboz for block zeroing") \
86 product(intx, BlockZeroingLowLimit, 256, \
87 "Minimum size in bytes when block zeroing will be used") \
88 range(1, max_jint) \
89 product(intx, CacheLineSize, DEFAULT_CACHE_LINE_SIZE, \
90 "Size in bytes of a CPU cache line") \
91 range(wordSize, max_jint) \
92 product(bool, TraceTraps, false, "Trace all traps the signal handler") \
93 product(bool, UseConservativeFence, false, \
94 "Extend i for r and o for w in the pred/succ flags of fence") \
95 product(bool, AvoidUnalignedAccesses, true, \
96 "Avoid generating unaligned memory accesses") \
97 product(bool, UseRVA20U64, true, "Use RVA20U64 profile") \
98 product(bool, UseRVA22U64, false, EXPERIMENTAL, "Use RVA22U64 profile") \
99 product(bool, UseRVA23U64, false, EXPERIMENTAL, "Use RVA23U64 profile") \
100 product(bool, UseRVC, false, DIAGNOSTIC, "Use RVC instructions") \
101 product(bool, UseRVV, false, DIAGNOSTIC, "Use RVV instructions") \
102 product(bool, UseZba, false, DIAGNOSTIC, "Use Zba instructions") \
103 product(bool, UseZbb, false, DIAGNOSTIC, "Use Zbb instructions") \
104 product(bool, UseZbkb, false, EXPERIMENTAL, "Use Zbkb instructions") \
105 product(bool, UseZbs, false, DIAGNOSTIC, "Use Zbs instructions") \
106 product(bool, UseZfa, false, EXPERIMENTAL, "Use Zfa instructions") \
107 product(bool, UseZfh, false, DIAGNOSTIC, "Use Zfh instructions") \
108 product(bool, UseZfhmin, false, DIAGNOSTIC, "Use Zfhmin instructions") \
109 product(bool, UseZacas, false, EXPERIMENTAL, "Use Zacas instructions") \
110 product(bool, UseZabha, false, EXPERIMENTAL, "Use UseZabha instructions") \
111 product(bool, UseZcb, false, EXPERIMENTAL, "Use Zcb instructions") \
112 product(bool, UseZic64b, false, EXPERIMENTAL, "Use Zic64b instructions") \
113 product(bool, UseZicbom, false, EXPERIMENTAL, "Use Zicbom instructions") \
114 product(bool, UseZicbop, false, EXPERIMENTAL, "Use Zicbop instructions") \
115 product(bool, UseZicboz, false, EXPERIMENTAL, "Use Zicboz instructions") \
116 product(bool, UseZicond, false, DIAGNOSTIC, "Use Zicond instructions") \
117 product(bool, UseZihintpause, false, EXPERIMENTAL, \
118 "Use Zihintpause instructions") \
119 product(bool, UseZtso, false, EXPERIMENTAL, "Assume Ztso memory model") \
120 product(bool, UseZvbb, false, EXPERIMENTAL, "Use Zvbb instructions") \
121 product(bool, UseZvbc, false, EXPERIMENTAL, "Use Zvbc instructions") \
122 product(bool, UseZvfh, false, DIAGNOSTIC, "Use Zvfh instructions") \
123 product(bool, UseZvkn, false, EXPERIMENTAL, \
124 "Use Zvkn group extension, Zvkned, Zvknhb, Zvkb, Zvkt") \
125 product(bool, UseCtxFencei, false, EXPERIMENTAL, \
126 "Use PR_RISCV_CTX_SW_FENCEI_ON to avoid explicit icache flush") \
127 product(bool, UseZvkg, false, EXPERIMENTAL, "Use Zvkg instructions")
128
129 #endif // CPU_RISCV_GLOBALS_RISCV_HPP