icache_aarch64.hpp

/*
 * Copyright (c) 2013, Red Hat Inc.
 * Copyright (c) 1997, 2010, 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 CPU_AARCH64_VM_ICACHE_AARCH64_HPP
#define CPU_AARCH64_VM_ICACHE_AARCH64_HPP

#ifdef __APPLE__
#include <libkern/OSCacheControl.h>

#define __clear_cache(start, end) \
    sys_icache_invalidate(start, (char*)end - (char*)start);
#endif

// Interface for updating the instruction cache.  Whenever the VM
// modifies code, part of the processor instruction cache potentially
// has to be flushed.

class ICache : public AbstractICache {
 public:
  static void initialize();
  static void invalidate_word(address addr) {
    __clear_cache((char *)addr, (char *)(addr + 3));
  }
  static void invalidate_range(address start, int nbytes) {
    __clear_cache((char *)start, (char *)(start + nbytes));
  }
};

#endif // CPU_AARCH64_VM_ICACHE_AARCH64_HPP