view src/hotspot/cpu/aarch64/icache_aarch64.hpp @ 59327:f814dd59bfe9

8245137: aarch64 ICache flush depends on enabling gnu extensions Summary: Use __builtin___clear_cache. Reviewed-by: aph, dholmes
author kbarrett
date Mon, 18 May 2020 10:47:52 -0400
parents 9807daeb47c4
children
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/*
 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2014, Red Hat Inc. 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
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 */

#ifndef CPU_AARCH64_ICACHE_AARCH64_HPP
#define CPU_AARCH64_ICACHE_AARCH64_HPP

// 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) {
    __builtin___clear_cache((char *)addr, (char *)(addr + 3));
  }
  static void invalidate_range(address start, int nbytes) {
    __builtin___clear_cache((char *)start, (char *)(start + nbytes));
  }
};

#endif // CPU_AARCH64_ICACHE_AARCH64_HPP