1 /* 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2007, 2008, 2009 Red Hat, Inc. 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_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP 27 #define OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP 28 29 #include "runtime/orderAccess.hpp" 30 #include "vm_version_zero.hpp" 31 32 #ifdef ARM 33 34 /* 35 * ARM Kernel helper for memory barrier. 36 * Using __asm __volatile ("":::"memory") does not work reliable on ARM 37 * and gcc __sync_synchronize(); implementation does not use the kernel 38 * helper for all gcc versions so it is unreliable to use as well. 39 */ 40 typedef void (__kernel_dmb_t) (void); 41 #define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0) 42 43 #define FULL_MEM_BARRIER __kernel_dmb() 44 #define READ_MEM_BARRIER __kernel_dmb() 45 #define WRITE_MEM_BARRIER __kernel_dmb() 46 47 #else // ARM 48 49 #ifdef __APPLE__ 50 #include <libkern/OSAtomic.h> 51 #define FULL_MEM_BARRIER OSMemoryBarrier() 52 #else 53 #define FULL_MEM_BARRIER __sync_synchronize() 54 #endif // __APPLE__ 55 56 #ifdef PPC 57 58 #define READ_MEM_BARRIER __asm __volatile ("isync":::"memory") 59 #ifdef __NO_LWSYNC__ 60 #define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory") 61 #else 62 #define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory") 63 #endif 64 65 #else // PPC 66 67 #define READ_MEM_BARRIER __asm __volatile ("":::"memory") 68 #define WRITE_MEM_BARRIER __asm __volatile ("":::"memory") 69 70 #endif // PPC 71 72 #endif // ARM 73 74 75 inline void OrderAccess::loadload() { acquire(); } 76 inline void OrderAccess::storestore() { release(); } 77 inline void OrderAccess::loadstore() { acquire(); } 78 inline void OrderAccess::storeload() { fence(); } 79 80 inline void OrderAccess::acquire() { 81 READ_MEM_BARRIER; 82 } 83 84 inline void OrderAccess::release() { 85 WRITE_MEM_BARRIER; 86 } 87 88 inline void OrderAccess::fence() { 89 FULL_MEM_BARRIER; 90 } 91 92 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { jbyte data = *p; acquire(); return data; } 93 inline jshort OrderAccess::load_acquire(volatile jshort* p) { jshort data = *p; acquire(); return data; } 94 inline jint OrderAccess::load_acquire(volatile jint* p) { jint data = *p; acquire(); return data; } 95 inline jlong OrderAccess::load_acquire(volatile jlong* p) { 96 jlong tmp; 97 os::atomic_copy64(p, &tmp); 98 acquire(); 99 return tmp; 100 } 101 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { jubyte data = *p; acquire(); return data; } 102 inline jushort OrderAccess::load_acquire(volatile jushort* p) { jushort data = *p; acquire(); return data; } 103 inline juint OrderAccess::load_acquire(volatile juint* p) { juint data = *p; acquire(); return data; } 104 inline julong OrderAccess::load_acquire(volatile julong* p) { 105 julong tmp; 106 os::atomic_copy64(p, &tmp); 107 acquire(); 108 return tmp; 109 } 110 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { jfloat data = *p; acquire(); return data; } 111 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { 112 jdouble tmp; 113 os::atomic_copy64(p, &tmp); 114 acquire(); 115 return tmp; 116 } 117 118 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { 119 intptr_t data = *p; 120 acquire(); 121 return data; 122 } 123 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { 124 void *data = *(void* volatile *)p; 125 acquire(); 126 return data; 127 } 128 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { 129 void *data = *(void* const volatile *)p; 130 acquire(); 131 return data; 132 } 133 134 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { release(); *p = v; } 135 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { release(); *p = v; } 136 inline void OrderAccess::release_store(volatile jint* p, jint v) { release(); *p = v; } 137 inline void OrderAccess::release_store(volatile jlong* p, jlong v) 138 { release(); os::atomic_copy64(&v, p); } 139 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { release(); *p = v; } 140 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; } 141 inline void OrderAccess::release_store(volatile juint* p, juint v) { release(); *p = v; } 142 inline void OrderAccess::release_store(volatile julong* p, julong v) 143 { release(); os::atomic_copy64(&v, p); } 144 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { release(); *p = v; } 145 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) 146 { release(); os::atomic_copy64(&v, p); } 147 148 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; } 149 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) 150 { release(); *(void* volatile *)p = v; } 151 152 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); } 153 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); } 154 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); } 155 inline void OrderAccess::store_fence(jlong* p, jlong v) { os::atomic_copy64(&v, p); fence(); } 156 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); } 157 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); } 158 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); } 159 inline void OrderAccess::store_fence(julong* p, julong v) { os::atomic_copy64(&v, p); fence(); } 160 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } 161 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); } 162 163 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); } 164 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); } 165 166 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { release_store(p, v); fence(); } 167 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { release_store(p, v); fence(); } 168 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { release_store(p, v); fence(); } 169 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); } 170 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store(p, v); fence(); } 171 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); } 172 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store(p, v); fence(); } 173 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store(p, v); fence(); } 174 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { release_store(p, v); fence(); } 175 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); } 176 177 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); } 178 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { release_store_ptr(p, v); fence(); } 179 180 #endif // OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP