/*

 * Copyright (c) 1999, 2013, 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.

 *

 */

#ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP

#define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP

  static void setup_fpu();

  static bool supports_sse();

  static jlong rdtsc();

  static bool is_allocatable(size_t bytes);

  // Used to register dynamic code cache area with the OS

  // Note: Currently only used in 64 bit Windows implementations

  static bool register_code_area(char *low, char *high) { return true; }

  /*

   * Work-around for broken NX emulation using CS limit, Red Hat patch "Exec-Shield"

   * (IA32 only).

   *

   * Map and execute at a high VA to prevent CS lazy updates race with SMP MM

   * invalidation.Further code generation by the JVM will no longer cause CS limit

   * updates.

   *

   * Affects IA32: RHEL 5 & 6, Ubuntu 10.04 (LTS), 10.10, 11.04, 11.10, 12.04.

   * @see JDK-8023956

   */

  static void workaround_expand_exec_shield_cs_limit();

#endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP