1 /* 2 * Copyright (c) 2006, 2010, 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 #include "precompiled.hpp" 26 #include "runtime/os.hpp" 27 #include "vm_version_sparc.hpp" 28 29 static bool cpuinfo_field_contains(const char* field, const char* value) { 30 char line[1024]; 31 bool rv = false; 32 33 FILE* fp = fopen("/proc/cpuinfo", "r"); 34 if (fp == NULL) { 35 return rv; 36 } 37 38 while (fgets(line, sizeof(line), fp) != NULL) { 39 assert(strlen(line) < sizeof(line) - 1, "buffer line[1024] is too small."); 40 if (strncmp(line, field, strlen(field)) == 0) { 41 if (strstr(line, value) != NULL) { 42 rv = true; 43 } 44 break; 45 } 46 } 47 48 fclose(fp); 49 return rv; 50 } 51 52 static bool detect_niagara() { 53 return cpuinfo_field_contains("cpu", "Niagara"); 54 } 55 56 static bool detect_blkinit() { 57 return cpuinfo_field_contains("cpucaps", "blkinit"); 58 } 59 60 int VM_Version::platform_features(int features) { 61 // Default to generic v9 62 features = generic_v9_m; 63 64 if (detect_niagara()) { 65 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");) 66 features = niagara1_m | T_family_m; 67 } 68 69 if (detect_blkinit()) { 70 features |= blk_init_instructions_m; 71 } 72 73 return features; 74 }