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atomic_aarch64.hpp
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/
atomic_aarch64.hpp
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/* Copyright (c) 2021, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef CPU_AARCH64_ATOMIC_AARCH64_HPP
#define CPU_AARCH64_ATOMIC_AARCH64_HPP
// Atomic stub implementation.
// Default implementations are in atomic_linux_aarch64.S
//
// All stubs pass arguments the same way
// x0: src/dest address
// x1: arg1
// x2: arg2 (optional)
// x3, x8, x9: scratch
typedef uint64_t (*aarch64_atomic_stub_t)(volatile void *ptr, uint64_t arg1, uint64_t arg2);
// Pointers to stubs
extern aarch64_atomic_stub_t aarch64_atomic_fetch_add_4_impl;
extern aarch64_atomic_stub_t aarch64_atomic_fetch_add_8_impl;
extern aarch64_atomic_stub_t aarch64_atomic_xchg_4_impl;
extern aarch64_atomic_stub_t aarch64_atomic_xchg_8_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_1_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_4_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_8_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_1_relaxed_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_4_relaxed_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_8_relaxed_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_4_release_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_8_release_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_4_seq_cst_impl;
extern aarch64_atomic_stub_t aarch64_atomic_cmpxchg_8_seq_cst_impl;
#endif // CPU_AARCH64_ATOMIC_AARCH64_HPP