Tue, 28 May 2019 16:35:59 +0800
#9224 Backport of #9173 Refactor read_cpu_info and supported 3A4000/3B4000
Reviewed-by: jiefu
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, 2019, Loongson Technology. 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.
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24 */
26 #ifndef CPU_MIPS_VM_VM_VERSION_MIPS_HPP
27 #define CPU_MIPS_VM_VM_VERSION_MIPS_HPP
29 #include "runtime/globals_extension.hpp"
30 #include "runtime/vm_version.hpp"
33 class VM_Version: public Abstract_VM_Version {
34 protected:
35 enum Feature_Flag {
36 with_l2_cache = 0,
37 spt_16k_page = 1,
38 gs464v = 2,
39 gs464e = 3,
40 gs464 = 4,
41 gs264 = 5,
42 with_gs_support = 6,
43 //////////////////////add some other feature here//////////////////
44 };
46 enum Feature_Flag_Set {
47 unknown_m = 0,
48 all_features_m = -1,
49 with_l2_cache_m = 1 << with_l2_cache,
50 spt_16k_page_m = 1 << spt_16k_page,
51 with_gs_support_m = 1 << with_gs_support,
52 gs464_m = 1 << gs464,
53 gs464v_m = 1 << gs464v,
54 gs464e_m = 1 << gs464e,
55 gs264_m = 1 << gs264,
57 //////////////////////add some other feature here//////////////////
58 };
60 enum Loongson_Family {
61 L_3A1000 = 0,
62 L_3B1500 = 1,
63 L_3A2000 = 2,
64 L_3B2000 = 3,
65 L_3A3000 = 4,
66 L_3B3000 = 5,
67 L_2K1000 = 6,
68 L_3A4000 = 7,
69 L_3B4000 = 8,
70 L_UNKNOWN = 9
71 };
73 struct Loongson_Cpuinfo {
74 Loongson_Family id;
75 const char* const match_str;
76 };
78 static int _features;
79 static const char* _features_str;
81 static void print_features();
82 static int determine_features();
83 static int platform_features(int features);
85 public:
86 // Initialization
87 static void initialize();
89 //mips has no such instructions, use ll/sc instead
90 static bool supports_compare_and_exchange() { return false; }
92 static bool has_l2_cache() { return _features & with_l2_cache_m; }
93 static bool has_16k_page() { return _features & spt_16k_page_m; }
94 static bool is_gs264() { return _features & gs264_m; }
95 static bool is_gs464() { return _features & gs464_m; }
96 static bool is_gs464v() { return _features & gs464v_m; }
97 static bool is_gs464e() { return _features & gs464e_m; }
98 static bool is_loongson() { return _features & with_gs_support_m; }
99 static bool supports_dsp() { return 0; /*Loongson CPUs do not support DSP instructions well*/}
100 static bool supports_ps() { return 1; /*Loongson CPUs support ps instructions*/}
101 static bool supports_3d() { return 0; /*Loongson CPUs do not support 3d instructions*/}
103 //////////////////////add some other feature here//////////////////
105 static const char* cpu_features() { return _features_str; }
107 // Assembler testing
108 static void allow_all();
109 static void revert();
110 };
112 #endif // CPU_MIPS_VM_VM_VERSION_MIPS_HPP