1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/* $OpenBSD: atomic.h,v 1.12 2014/03/29 18:09:28 guenther Exp $ */
/* $NetBSD: atomic.h,v 1.7 2001/12/17 23:34:57 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Misc. `atomic' operations.
*/
#ifndef _MACHINE_ATOMIC_H_
#define _MACHINE_ATOMIC_H_
#if defined(_KERNEL)
/*
* atomic_setbits_ulong:
*
* Atomically set bits in a `unsigned long'.
*/
static __inline void
atomic_setbits_ulong(volatile unsigned long *ulp, unsigned long v)
{
unsigned long t0;
__asm volatile(
"# BEGIN atomic_setbits_ulong\n"
"1: ldq_l %0, %1 \n"
" or %0, %2, %0 \n"
" stq_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_setbits_ulong"
: "=&r" (t0), "=m" (*ulp)
: "r" (v)
: "memory");
}
/*
* atomic_clearbits_ulong:
*
* Atomically clear bits in a `unsigned long'.
*/
static __inline void
atomic_clearbits_ulong(volatile unsigned long *ulp, unsigned long v)
{
unsigned long t0;
__asm volatile(
"# BEGIN atomic_clearbits_ulong\n"
"1: ldq_l %0, %1 \n"
" and %0, %2, %0 \n"
" stq_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_clearbits_ulong"
: "=&r" (t0), "=m" (*ulp)
: "r" (~v)
: "memory");
}
/*
* atomic_add_ulong:
*
* Atomically add a value to a `unsigned long'.
*/
static __inline void
atomic_add_ulong(volatile unsigned long *ulp, unsigned long v)
{
unsigned long t0;
__asm volatile(
"# BEGIN atomic_add_ulong\n"
"1: ldq_l %0, %1 \n"
" addq %0, %2, %0 \n"
" stq_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_add_ulong"
: "=&r" (t0), "=m" (*ulp)
: "r" (v)
: "memory");
}
/*
* atomic_sub_ulong:
*
* Atomically subtract a value from a `unsigned long'.
*/
static __inline void
atomic_sub_ulong(volatile unsigned long *ulp, unsigned long v)
{
unsigned long t0;
__asm volatile(
"# BEGIN atomic_sub_ulong\n"
"1: ldq_l %0, %1 \n"
" subq %0, %2, %0 \n"
" stq_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_sub_ulong"
: "=&r" (t0), "=m" (*ulp)
: "r" (v)
: "memory");
}
/*
* atomic_loadlatch_ulong:
*
* Atomically load and latch a `unsigned long' value.
*/
static __inline unsigned long
atomic_loadlatch_ulong(volatile unsigned long *ulp, unsigned long v)
{
unsigned long t0, v0;
__asm volatile(
"# BEGIN atomic_loadlatch_ulong\n"
"1: mov %3, %0 \n"
" ldq_l %1, %2 \n"
" stq_c %0, %2 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_loadlatch_ulong"
: "=&r" (t0), "=r" (v0), "=m" (*ulp)
: "r" (v)
: "memory");
return (v0);
}
/*
* atomic_setbits_int:
*
* Atomically set bits in a `unsigned int'.
*/
static __inline void
atomic_setbits_int(volatile unsigned int *uip, unsigned int v)
{
unsigned int t0;
__asm volatile(
"# BEGIN atomic_setbits_ulong\n"
"1: ldl_l %0, %1 \n"
" or %0, %2, %0 \n"
" stl_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_setbits_int"
: "=&r" (t0), "=m" (*uip)
: "r" (v)
: "memory");
}
/*
* atomic_clearbits_int:
*
* Atomically clear bits in a `unsigned int'.
*/
static __inline void
atomic_clearbits_int(volatile unsigned int *uip, unsigned int v)
{
unsigned int t0;
__asm volatile(
"# BEGIN atomic_clearbits_int\n"
"1: ldl_l %0, %1 \n"
" and %0, %2, %0 \n"
" stl_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_clearbits_int"
: "=&r" (t0), "=m" (*uip)
: "r" (~v)
: "memory");
}
/*
* atomic_add_int:
*
* Atomically add a value to an `int'.
*/
static __inline void
atomic_add_int(volatile int *ulp, int v)
{
unsigned long t0;
__asm volatile(
"# BEGIN atomic_add_int\n"
"1: ldl_l %0, %1 \n"
" addl %0, %2, %0 \n"
" stl_c %0, %1 \n"
" beq %0, 2f \n"
" mb \n"
" br 3f \n"
"2: br 1b \n"
"3: \n"
" # END atomic_add_ulong"
: "=&r" (t0), "=m" (*ulp)
: "r" (v)
: "memory");
}
#endif /* defined(_KERNEL) */
#endif /* _MACHINE_ATOMIC_H_ */
|
