aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP
aoqi@0: #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP
aoqi@0: 
aoqi@0:   static void setup_fpu();
aoqi@0:   static bool supports_sse();
aoqi@0: 
aoqi@0:   static jlong rdtsc();
aoqi@0: 
aoqi@0:   static bool is_allocatable(size_t bytes);
aoqi@0: 
aoqi@0:   // Used to register dynamic code cache area with the OS
aoqi@0:   // Note: Currently only used in 64 bit Windows implementations
aoqi@0:   static bool register_code_area(char *low, char *high) { return true; }
aoqi@0: 
aoqi@0:   /*
aoqi@0:    * Work-around for broken NX emulation using CS limit, Red Hat patch "Exec-Shield"
aoqi@0:    * (IA32 only).
aoqi@0:    *
aoqi@0:    * Map and execute at a high VA to prevent CS lazy updates race with SMP MM
aoqi@0:    * invalidation.Further code generation by the JVM will no longer cause CS limit
aoqi@0:    * updates.
aoqi@0:    *
aoqi@0:    * Affects IA32: RHEL 5 & 6, Ubuntu 10.04 (LTS), 10.10, 11.04, 11.10, 12.04.
aoqi@0:    * @see JDK-8023956
aoqi@0:    */
aoqi@0:   static void workaround_expand_exec_shield_cs_limit();
aoqi@0: 
aoqi@0: #endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP