1/*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. 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 */
25
26#ifndef OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP
27#define OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP
28
29#include "runtime/os.hpp"
30
31// See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
32inline jlong os::rdtsc() {
33  uint64_t res;
34  uint32_t ts1, ts2;
35  __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
36  res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
37  return (jlong)res;
38}
39
40#endif // OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP
41