1 /* 2 * Copyright (c) 2003, 2018, 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_VM_ORDERACCESS_LINUX_AARCH64_INLINE_HPP 27 #define OS_CPU_LINUX_AARCH64_VM_ORDERACCESS_LINUX_AARCH64_INLINE_HPP 28 29 #include "runtime/atomic.hpp" 30 #include "runtime/orderAccess.hpp" 31 #include "runtime/os.hpp" 32 #include "vm_version_aarch64.hpp" 33 34 // Implementation of class OrderAccess. 35 36 inline void OrderAccess::loadload() { acquire(); } 37 inline void OrderAccess::storestore() { release(); } 38 inline void OrderAccess::loadstore() { acquire(); } 39 inline void OrderAccess::storeload() { fence(); } 40 41 inline void OrderAccess::acquire() { 42 READ_MEM_BARRIER; 43 } 44 45 inline void OrderAccess::release() { 46 WRITE_MEM_BARRIER; 47 } 48 49 inline void OrderAccess::fence() { 50 FULL_MEM_BARRIER; 51 } 52 53 template<size_t byte_size> 54 struct OrderAccess::PlatformOrderedLoad<byte_size, X_ACQUIRE> 55 { 56 template <typename T> 57 T operator()(const volatile T* p) const { T data; __atomic_load(p, &data, __ATOMIC_ACQUIRE); return data; } 58 }; 59 60 template<size_t byte_size> 61 struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X> 62 { 63 template <typename T> 64 void operator()(T v, volatile T* p) const { __atomic_store(p, &v, __ATOMIC_RELEASE); } 65 }; 66 67 template<size_t byte_size> 68 struct OrderAccess::PlatformOrderedStore<byte_size, RELEASE_X_FENCE> 69 { 70 template <typename T> 71 void operator()(T v, volatile T* p) const { release_store(p, v); fence(); } 72 }; 73 74 #endif // OS_CPU_LINUX_AARCH64_VM_ORDERACCESS_LINUX_AARCH64_INLINE_HPP