Sun, 12 Mar 2017 09:04:47 +0800
#4670 Detect LoongsonCPUs to adapt different platforms.
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, 2016, 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.
23 *
24 */
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.hpp"
28 #include "asm/macroAssembler.inline.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "runtime/java.hpp"
31 #include "runtime/stubCodeGenerator.hpp"
32 #include "vm_version_mips.hpp"
33 #ifdef TARGET_OS_FAMILY_linux
34 # include "os_linux.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_solaris
37 # include "os_solaris.inline.hpp"
38 #endif
39 #ifdef TARGET_OS_FAMILY_windows
40 # include "os_windows.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_FAMILY_bsd
43 # include "os_bsd.inline.hpp"
44 #endif
45 /*
46 int VM_Version::_cpu;
47 int VM_Version::_model;
48 int VM_Version::_stepping;
49 int VM_Version::_cpuFeatures;
50 const char* VM_Version::_features_str = "";
51 VM_Version::CpuidInfo VM_Version::_cpuid_info = { 0, };
53 static BufferBlob* stub_blob;
54 static const int stub_size = 300;
56 extern "C" {
57 typedef void (*getPsrInfo_stub_t)(void*);
58 }
59 static getPsrInfo_stub_t getPsrInfo_stub = NULL;
60 */
61 int VM_Version::_features = VM_Version::unknown_m;
62 const char* VM_Version::_features_str = "";
63 /*
64 class VM_Version_StubGenerator: public StubCodeGenerator {
65 public:
67 VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {}
69 address generate_getPsrInfo() {
70 };
71 };
74 void VM_Version::get_processor_features() {
75 }
76 */
77 void VM_Version::initialize() {
79 _features = determine_features();
80 //no need, Abstract_VM_Version already define it as false
81 _supports_cx8 = true;
83 //////////////////////add some other feature here//////////////////
84 #ifdef COMPILER2
85 if (MaxVectorSize > 0) {
86 if (!is_power_of_2(MaxVectorSize)) {
87 warning("MaxVectorSize must be a power of 2");
88 MaxVectorSize = 8;
89 }
90 if (MaxVectorSize > 0 && supports_ps()) {
91 MaxVectorSize = 8;
92 }
93 }
95 if (is_gs464e()) {
96 if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction)) {
97 FLAG_SET_DEFAULT(UseCountTrailingZerosInstruction, 1);
98 }
99 } else if (UseCountTrailingZerosInstruction) {
100 if (!FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction))
101 warning("Only 3A2000/3000 CPUs support UseCountTrailingZerosInstruction");
102 FLAG_SET_DEFAULT(UseCountTrailingZerosInstruction, 0);
103 }
104 #endif
105 UseSSE = 0; // Only on x86 and x64
107 if (is_loongson()) {
108 if (FLAG_IS_DEFAULT(UseLoongsonISA)) {
109 FLAG_SET_DEFAULT(UseLoongsonISA, 1);
110 }
111 } else if (UseLoongsonISA) {
112 if (!FLAG_IS_DEFAULT(UseLoongsonISA))
113 warning("Only Loongson CPUs support LoongISA");
114 FLAG_SET_DEFAULT(UseLoongsonISA, 0);
115 }
117 if (is_gs464e()) {
118 if (FLAG_IS_DEFAULT(Use3A2000)) {
119 FLAG_SET_DEFAULT(Use3A2000, 1);
120 }
121 } else if (Use3A2000) {
122 if (!FLAG_IS_DEFAULT(Use3A2000))
123 warning("Only 3A2000/3000 CPUs support this option");
124 FLAG_SET_DEFAULT(Use3A2000, 0);
125 }
127 char buf[256];
128 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
129 (has_l2_cache() ? ", has_l2_cache" : ""),
130 (has_16k_page() ? ", has_16k_page" : ""),
131 (is_loongson() ? ", on_loongson" : ""),
132 (is_gs464() ? ", 3A1000" : ""),
133 (is_gs464v() ? ", 3B1500" : "" ),
134 (is_gs464e() ? ", 3A2000/3A3000" : ""),
135 (UseLoongsonISA ? ", UseLoongsonISA" : ""),
136 (UseCountTrailingZerosInstruction ? ", UseCountTrailingZerosInstruction" : ""),
137 (Use3A2000 ? ", Use3A2000" : ""));
139 // buf is started with ", " or is empty
140 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
142 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {
143 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1);
144 }
146 if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) {
147 FLAG_SET_DEFAULT(AllocatePrefetchLines, 1);
148 }
150 if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize)) {
151 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, 64);
152 }
154 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
155 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64);
156 }
158 if (FLAG_IS_DEFAULT(AllocateInstancePrefetchLines)) {
159 FLAG_SET_DEFAULT(AllocateInstancePrefetchLines, 1);
160 }
162 NOT_PRODUCT( if (PrintMiscellaneous && Verbose) print_features(); );
163 }
165 void VM_Version::print_features() {
166 tty->print_cr("Version:%s", cpu_features());
167 }
169 int VM_Version::determine_features() {
170 //////////////////////add some other feature here//////////////////
171 int features = platform_features(unknown_m);
172 //spt_16k_page_m;
173 return features;
174 }
176 static int saved_features = 0;
178 void VM_Version::allow_all() {
179 saved_features = _features;
180 _features = all_features_m;
181 }
183 void VM_Version::revert() {
184 _features = saved_features;
185 }