/*

 * Copyright (c) 2008, 2011, 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_arm.hpp"

# include <sys/utsname.h>

// Use uname() to find the architecture version

void VM_Version::get_os_cpu_info() {

  struct utsname name;

  static bool done = false;

  // Support for multiple calls in the init phase

  if (done) return;

  done = true;

  uname(&name);

  if (strncmp(name.machine, "aarch64", 7) == 0) {

    _arm_arch = 8;

  } else if (strncmp(name.machine, "armv", 4) == 0 &&

      name.machine[4] >= '5' && name.machine[4] <= '9') {

    _arm_arch = (int)(name.machine[4] - '0');

  }

}

// Make sure that _arm_arch is initialized so that any calls to OrderAccess will

// use proper dmb instruction

void VM_Version::early_initialize() {

  get_os_cpu_info();

}