orderAccess_bsd_zero.inline.hpp revision 6760:22b98ab2a69f 
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_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
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 */
39typedef 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#ifdef __NO_LWSYNC__
53#define READ_MEM_BARRIER __asm __volatile ("sync":::"memory")
54#define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
55#else
56#define READ_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
57#define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
58#endif
59
60#else // PPC
61
62#define READ_MEM_BARRIER __asm __volatile ("":::"memory")
63#define WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
64
65#endif // PPC
66
67#endif // ARM
68
69
70inline void OrderAccess::loadload()   { acquire(); }
71inline void OrderAccess::storestore() { release(); }
72inline void OrderAccess::loadstore()  { acquire(); }
73inline void OrderAccess::storeload()  { fence(); }
74
75inline void OrderAccess::acquire() {
76  READ_MEM_BARRIER;
77}
78
79inline void OrderAccess::release() {
80  WRITE_MEM_BARRIER;
81}
82
83inline void OrderAccess::fence() {
84  FULL_MEM_BARRIER;
85}
86
87inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { jbyte data = *p; acquire(); return data; }
88inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { jshort data = *p; acquire(); return data; }
89inline jint     OrderAccess::load_acquire(volatile jint*    p) { jint data = *p; acquire(); return data; }
90inline jlong    OrderAccess::load_acquire(volatile jlong*   p) {
91  jlong tmp;
92  os::atomic_copy64(p, &tmp);
93  acquire();
94  return tmp;
95}
96inline jubyte    OrderAccess::load_acquire(volatile jubyte*   p) { jubyte data = *p; acquire(); return data; }
97inline jushort   OrderAccess::load_acquire(volatile jushort*  p) { jushort data = *p; acquire(); return data; }
98inline juint     OrderAccess::load_acquire(volatile juint*    p) { juint data = *p; acquire(); return data; }
99inline julong   OrderAccess::load_acquire(volatile julong*  p) {
100  julong tmp;
101  os::atomic_copy64(p, &tmp);
102  acquire();
103  return tmp;
104}
105inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { jfloat data = *p; acquire(); return data; }
106inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) {
107  jdouble tmp;
108  os::atomic_copy64(p, &tmp);
109  acquire();
110  return tmp;
111}
112
113inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) {
114  intptr_t data = *p;
115  acquire();
116  return data;
117}
118inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) {
119  void *data = *(void* volatile *)p;
120  acquire();
121  return data;
122}
123inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) {
124  void *data = *(void* const volatile *)p;
125  acquire();
126  return data;
127}
128
129inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { release(); *p = v; }
130inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { release(); *p = v; }
131inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { release(); *p = v; }
132inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v)
133{ release(); os::atomic_copy64(&v, p); }
134inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { release(); *p = v; }
135inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; }
136inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { release(); *p = v; }
137inline void     OrderAccess::release_store(volatile julong*  p, julong  v)
138{ release(); os::atomic_copy64(&v, p); }
139inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { release(); *p = v; }
140inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v)
141{ release(); os::atomic_copy64(&v, p); }
142
143inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; }
144inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v)
145{ release(); *(void* volatile *)p = v; }
146
147inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }
148inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }
149inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }
150inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { os::atomic_copy64(&v, p); fence(); }
151inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }
152inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
153inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }
154inline void     OrderAccess::store_fence(julong*  p, julong  v) { os::atomic_copy64(&v, p); fence(); }
155inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
156inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); }
157
158inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
159inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }
160
161inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { release_store(p, v); fence(); }
162inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { release_store(p, v); fence(); }
163inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { release_store(p, v); fence(); }
164inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { release_store(p, v); fence(); }
165inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { release_store(p, v); fence(); }
166inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); }
167inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { release_store(p, v); fence(); }
168inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }
169inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { release_store(p, v); fence(); }
170inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); }
171
172inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); }
173inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { release_store_ptr(p, v); fence(); }
174
175#endif // OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP
176