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/*
* Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "runtime/os.hpp"
#include "vm_version_sparc.hpp"
static bool cpuinfo_field_contains(const char* field, const char* value) {
char line[1024];
bool rv = false;
FILE* fp = fopen("/proc/cpuinfo", "r");
if (fp == NULL) {
return rv;
}
while (fgets(line, sizeof(line), fp) != NULL) {
assert(strlen(line) < sizeof(line) - 1, "buffer line[1024] is too small.");
if (strncmp(line, field, strlen(field)) == 0) {
if (strstr(line, value) != NULL) {
rv = true;
}
break;
}
}
fclose(fp);
return rv;
}
static bool detect_niagara() {
return cpuinfo_field_contains("cpu", "Niagara");
}
static bool detect_M_family() {
return cpuinfo_field_contains("cpu", "SPARC-M");
}
static bool detect_blkinit() {
return cpuinfo_field_contains("cpucaps", "blkinit");
}
int VM_Version::platform_features(int features) {
// Default to generic v9
features = generic_v9_m;
if (detect_niagara()) {
NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");)
features = niagara1_m | T_family_m;
}
if (detect_M_family()) {
NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on M family");)
features = sun4v_m | generic_v9_m | M_family_m | T_family_m;
}
if (detect_blkinit()) {
features |= blk_init_instructions_m;
}
return features;
}
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