1 /*
2 * Copyright (c) 2003, 2014, 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_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP
27 #define OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP
28
29 #include "runtime/orderAccess.hpp"
30
31 #ifdef ARM
32
33 /*
34 * ARM Kernel helper for memory barrier.
35 * Using __asm __volatile ("":::"memory") does not work reliable on ARM
36 * and gcc __sync_synchronize(); implementation does not use the kernel
37 * helper for all gcc versions so it is unreliable to use as well.
38 */
39 typedef void (__kernel_dmb_t) (void);
40 #define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
41
42 #define FULL_MEM_BARRIER __kernel_dmb()
43 #define READ_MEM_BARRIER __kernel_dmb()
44 #define WRITE_MEM_BARRIER __kernel_dmb()
45
46 #else // ARM
47
48 #define FULL_MEM_BARRIER __sync_synchronize()
49
50 #ifdef PPC
51
52 #define READ_MEM_BARRIER __asm __volatile ("isync":::"memory")
53 #ifdef __NO_LWSYNC__
54 #define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
55 #else
56 #define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
57 #endif
58
59 #else // PPC
60
61 #define READ_MEM_BARRIER __asm __volatile ("":::"memory")
62 #define WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
63
64 #endif // PPC
65
66 #endif // ARM
67
68
69 inline void OrderAccess::loadload() { acquire(); }
70 inline void OrderAccess::storestore() { release(); }
71 inline void OrderAccess::loadstore() { acquire(); }
72 inline void OrderAccess::storeload() { fence(); }
73
74 inline void OrderAccess::acquire() {
75 READ_MEM_BARRIER;
76 }
77
78 inline void OrderAccess::release() {
79 WRITE_MEM_BARRIER;
80 }
81
82 inline void OrderAccess::fence() {
83 FULL_MEM_BARRIER;
84 }
85
86 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { jbyte data = *p; acquire(); return data; }
87 inline jshort OrderAccess::load_acquire(volatile jshort* p) { jshort data = *p; acquire(); return data; }
88 inline jint OrderAccess::load_acquire(volatile jint* p) { jint data = *p; acquire(); return data; }
89 inline jlong OrderAccess::load_acquire(volatile jlong* p) {
90 jlong tmp;
91 os::atomic_copy64(p, &tmp);
92 acquire();
93 return tmp;
94 }
95 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { jubyte data = *p; acquire(); return data; }
96 inline jushort OrderAccess::load_acquire(volatile jushort* p) { jushort data = *p; acquire(); return data; }
97 inline juint OrderAccess::load_acquire(volatile juint* p) { juint data = *p; acquire(); return data; }
98 inline julong OrderAccess::load_acquire(volatile julong* p) {
99 julong tmp;
100 os::atomic_copy64(p, &tmp);
101 acquire();
102 return tmp;
103 }
104 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { jfloat data = *p; acquire(); return data; }
105 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) {
106 jdouble tmp;
107 os::atomic_copy64(p, &tmp);
108 acquire();
109 return tmp;
110 }
111
112 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) {
113 intptr_t data = *p;
114 acquire();
115 return data;
116 }
117 inline void* OrderAccess::load_ptr_acquire(volatile void* p) {
118 void *data = *(void* volatile *)p;
119 acquire();
120 return data;
121 }
122 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) {
123 void *data = *(void* const volatile *)p;
124 acquire();
125 return data;
126 }
127
128 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { release(); *p = v; }
129 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { release(); *p = v; }
130 inline void OrderAccess::release_store(volatile jint* p, jint v) { release(); *p = v; }
131 inline void OrderAccess::release_store(volatile jlong* p, jlong v)
132 { release(); os::atomic_copy64(&v, p); }
133 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { release(); *p = v; }
134 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; }
135 inline void OrderAccess::release_store(volatile juint* p, juint v) { release(); *p = v; }
136 inline void OrderAccess::release_store(volatile julong* p, julong v)
137 { release(); os::atomic_copy64(&v, p); }
138 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { release(); *p = v; }
139 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v)
140 { release(); os::atomic_copy64(&v, p); }
141
142 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; }
143 inline void OrderAccess::release_store_ptr(volatile void* p, void* v)
144 { release(); *(void* volatile *)p = v; }
145
146 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); }
147 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); }
148 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); }
149 inline void OrderAccess::store_fence(jlong* p, jlong v) { os::atomic_copy64(&v, p); fence(); }
150 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); }
151 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
152 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); }
153 inline void OrderAccess::store_fence(julong* p, julong v) { os::atomic_copy64(&v, p); fence(); }
154 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); }
155 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); }
156
157 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
158 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); }
159
160 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { release_store(p, v); fence(); }
161 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { release_store(p, v); fence(); }
162 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { release_store(p, v); fence(); }
163 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); }
164 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store(p, v); fence(); }
165 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); }
166 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store(p, v); fence(); }
167 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store(p, v); fence(); }
168 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { release_store(p, v); fence(); }
169 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); }
170
171 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); }
172 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { release_store_ptr(p, v); fence(); }
173
174 #endif // OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP