1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2013 SAP AG. 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_PPC_VM_ORDERACCESS_LINUX_PPC_INLINE_HPP 27 #define OS_CPU_LINUX_PPC_VM_ORDERACCESS_LINUX_PPC_INLINE_HPP 28 29 #include "runtime/orderAccess.hpp" 30 #include "vm_version_ppc.hpp" 31 32 #ifndef PPC64 33 #error "OrderAccess currently only implemented for PPC64" 34 #endif 35 36 // Implementation of class OrderAccess. 37 38 // 39 // Machine barrier instructions: 40 // 41 // - sync Two-way memory barrier, aka fence. 42 // - lwsync orders Store|Store, 43 // Load|Store, 44 // Load|Load, 45 // but not Store|Load 46 // - eieio orders Store|Store 47 // - isync Invalidates speculatively executed instructions, 48 // but isync may complete before storage accesses 49 // associated with instructions preceding isync have 50 // been performed. 51 // 52 // Semantic barrier instructions: 53 // (as defined in orderAccess.hpp) 54 // 55 // - release orders Store|Store, (maps to lwsync) 56 // Load|Store 57 // - acquire orders Load|Store, (maps to lwsync) 58 // Load|Load 59 // - fence orders Store|Store, (maps to sync) 60 // Load|Store, 61 // Load|Load, 62 // Store|Load 63 // 64 65 #define inlasm_sync() __asm__ __volatile__ ("sync" : : : "memory"); 66 #define inlasm_lwsync() __asm__ __volatile__ ("lwsync" : : : "memory"); 67 #define inlasm_eieio() __asm__ __volatile__ ("eieio" : : : "memory"); 68 #define inlasm_isync() __asm__ __volatile__ ("isync" : : : "memory"); 69 #define inlasm_release() inlasm_lwsync(); 70 #define inlasm_acquire() inlasm_lwsync(); 71 // Use twi-isync for load_acquire (faster than lwsync). 72 #define inlasm_acquire_reg(X) __asm__ __volatile__ ("twi 0,%0,0\n isync\n" : : "r" (X) : "memory"); 73 #define inlasm_fence() inlasm_sync(); 74 75 inline void OrderAccess::loadload() { inlasm_lwsync(); } 76 inline void OrderAccess::storestore() { inlasm_lwsync(); } 77 inline void OrderAccess::loadstore() { inlasm_lwsync(); } 78 inline void OrderAccess::storeload() { inlasm_fence(); } 79 80 inline void OrderAccess::acquire() { inlasm_acquire(); } 81 inline void OrderAccess::release() { inlasm_release(); } 82 inline void OrderAccess::fence() { inlasm_fence(); } 83 84 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { register jbyte t = *p; inlasm_acquire_reg(t); return t; } 85 inline jshort OrderAccess::load_acquire(volatile jshort* p) { register jshort t = *p; inlasm_acquire_reg(t); return t; } 86 inline jint OrderAccess::load_acquire(volatile jint* p) { register jint t = *p; inlasm_acquire_reg(t); return t; } 87 inline jlong OrderAccess::load_acquire(volatile jlong* p) { register jlong t = *p; inlasm_acquire_reg(t); return t; } 88 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { register jubyte t = *p; inlasm_acquire_reg(t); return t; } 89 inline jushort OrderAccess::load_acquire(volatile jushort* p) { register jushort t = *p; inlasm_acquire_reg(t); return t; } 90 inline juint OrderAccess::load_acquire(volatile juint* p) { register juint t = *p; inlasm_acquire_reg(t); return t; } 91 inline julong OrderAccess::load_acquire(volatile julong* p) { return (julong)load_acquire((volatile jlong*)p); } 92 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { register jfloat t = *p; inlasm_acquire(); return t; } 93 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { register jdouble t = *p; inlasm_acquire(); return t; } 94 95 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return (intptr_t)load_acquire((volatile jlong*)p); } 96 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return (void*) load_acquire((volatile jlong*)p); } 97 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return (void*) load_acquire((volatile jlong*)p); } 98 99 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { inlasm_release(); *p = v; } 100 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { inlasm_release(); *p = v; } 101 inline void OrderAccess::release_store(volatile jint* p, jint v) { inlasm_release(); *p = v; } 102 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { inlasm_release(); *p = v; } 103 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { inlasm_release(); *p = v; } 104 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { inlasm_release(); *p = v; } 105 inline void OrderAccess::release_store(volatile juint* p, juint v) { inlasm_release(); *p = v; } 106 inline void OrderAccess::release_store(volatile julong* p, julong v) { inlasm_release(); *p = v; } 107 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { inlasm_release(); *p = v; } 108 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { inlasm_release(); *p = v; } 109 110 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { inlasm_release(); *p = v; } 111 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { inlasm_release(); *(void* volatile *)p = v; } 112 113 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; inlasm_fence(); } 114 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; inlasm_fence(); } 115 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; inlasm_fence(); } 116 inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; inlasm_fence(); } 117 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; inlasm_fence(); } 118 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; inlasm_fence(); } 119 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; inlasm_fence(); } 120 inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; inlasm_fence(); } 121 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; inlasm_fence(); } 122 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; inlasm_fence(); } 123 124 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; inlasm_fence(); } 125 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; inlasm_fence(); } 126 127 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { inlasm_release(); *p = v; inlasm_fence(); } 128 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { inlasm_release(); *p = v; inlasm_fence(); } 129 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { inlasm_release(); *p = v; inlasm_fence(); } 130 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { inlasm_release(); *p = v; inlasm_fence(); } 131 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { inlasm_release(); *p = v; inlasm_fence(); } 132 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { inlasm_release(); *p = v; inlasm_fence(); } 133 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { inlasm_release(); *p = v; inlasm_fence(); } 134 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { inlasm_release(); *p = v; inlasm_fence(); } 135 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { inlasm_release(); *p = v; inlasm_fence(); } 136 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { inlasm_release(); *p = v; inlasm_fence(); } 137 138 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { inlasm_release(); *p = v; inlasm_fence(); } 139 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { inlasm_release(); *(void* volatile *)p = v; inlasm_fence(); } 140 141 #undef inlasm_sync 142 #undef inlasm_lwsync 143 #undef inlasm_eieio 144 #undef inlasm_isync 145 #undef inlasm_release 146 #undef inlasm_acquire 147 #undef inlasm_fence 148 149 #endif // OS_CPU_LINUX_PPC_VM_ORDERACCESS_LINUX_PPC_INLINE_HPP