1/* 2 * Copyright (c) 2006, 2016, 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 "logging/log.hpp" 26#include "precompiled.hpp" 27#include "runtime/os.hpp" 28#include "vm_version_sparc.hpp" 29 30static bool cpuinfo_field_contains(const char* field, const char* value) { 31 char line[1024]; 32 bool rv = false; 33 34 FILE* fp = fopen("/proc/cpuinfo", "r"); 35 if (fp == NULL) { 36 return rv; 37 } 38 39 while (fgets(line, sizeof(line), fp) != NULL) { 40 assert(strlen(line) < sizeof(line) - 1, "buffer line[1024] is too small."); 41 if (strncmp(line, field, strlen(field)) == 0) { 42 if (strstr(line, value) != NULL) { 43 rv = true; 44 } 45 break; 46 } 47 } 48 49 fclose(fp); 50 return rv; 51} 52 53static bool detect_niagara() { 54 return cpuinfo_field_contains("cpu", "Niagara"); 55} 56 57static bool detect_M_family() { 58 return cpuinfo_field_contains("cpu", "SPARC-M"); 59} 60 61static bool detect_blkinit() { 62 return cpuinfo_field_contains("cpucaps", "blkinit"); 63} 64 65int VM_Version::platform_features(int features) { 66 // Default to generic v9 67 features = generic_v9_m; 68 69 if (detect_niagara()) { 70 log_info(os, cpu)("Detected Linux on Niagara"); 71 features = niagara1_m | T_family_m; 72 } 73 74 if (detect_M_family()) { 75 log_info(os, cpu)("Detected Linux on M family"); 76 features = sun4v_m | generic_v9_m | M_family_m | T_family_m; 77 } 78 79 if (detect_blkinit()) { 80 features |= blk_init_instructions_m; 81 } 82 83 return features; 84} 85