1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef OS_CPU_LINUX_AARCH64_ORDERACCESS_LINUX_AARCH64_HPP 27 #define OS_CPU_LINUX_AARCH64_ORDERACCESS_LINUX_AARCH64_HPP 28 29 // Included in orderAccess.hpp header file. 30 31 #include "vm_version_aarch64.hpp" 32 33 // Implementation of class OrderAccess. 34 35 inline void OrderAccess::loadload() { acquire(); } 36 inline void OrderAccess::storestore() { release(); } 37 inline void OrderAccess::loadstore() { acquire(); } 38 inline void OrderAccess::storeload() { fence(); } 39 40 inline void OrderAccess::acquire() { 41 READ_MEM_BARRIER; 42 } 43 44 inline void OrderAccess::release() { 45 WRITE_MEM_BARRIER; 46 } 47 48 inline void OrderAccess::fence() { 49 FULL_MEM_BARRIER; 50 } 51 52 inline void OrderAccess::cross_modify_fence() { } 53 54 template<size_t byte_size> 55 struct OrderAccess::PlatformOrderedLoad<byte_size, X_ACQUIRE> 56 { 57 template <typename T> 58 T operator()(const volatile T* p) const { T data; __atomic_load(const_cast<T*>(p), &data, __ATOMIC_ACQUIRE); return data; } 59 }; 60 61 template<size_t byte_size> 62 struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X> 63 { 64 template <typename T> 65 void operator()(T v, volatile T* p) const { __atomic_store(const_cast<T*>(p), &v, __ATOMIC_RELEASE); } 66 }; 67 68 template<size_t byte_size> 69 struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X_FENCE> 70 { 71 template <typename T> 72 void operator()(T v, volatile T* p) const { release_store(p, v); fence(); } 73 }; 74 75 #endif // OS_CPU_LINUX_AARCH64_ORDERACCESS_LINUX_AARCH64_HPP