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