1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
   4  * Copyright (c) 2015, Linaro Ltd. All rights reserved.
   5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   6  *
   7  * This code is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 only, as
   9  * published by the Free Software Foundation.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  *
  25  */
  26 
  27 #ifndef OS_CPU_LINUX_AARCH32_VM_OS_LINUX_AARCH32_INLINE_HPP
  28 #define OS_CPU_LINUX_AARCH32_VM_OS_LINUX_AARCH32_INLINE_HPP
  29 
  30 #include "runtime/os.hpp"
  31 
  32 // See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
  33 inline jlong os::rdtsc() {
  34   uint64_t res;
  35   uint32_t ts1, ts2;
  36   __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
  37   res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
  38   return (jlong)res;
  39 }
  40 
  41 #endif // OS_CPU_LINUX_AARCH32_VM_OS_LINUX_AARCH32_INLINE_HPP