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
|
/*
* BK Id: SCCS/s.bitops.c 1.7 05/17/01 18:14:21 cort
*/
/*
* Copyright (C) 1996 Paul Mackerras.
*/
#include <linux/kernel.h>
#include <asm/bitops.h>
/*
* If the bitops are not inlined in bitops.h, they are defined here.
* -- paulus
*/
#if !__INLINE_BITOPS
void set_bit(int nr, volatile void * addr)
{
unsigned long old;
unsigned long mask = 1 << (nr & 0x1f);
unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%3 \n\
or %0,%0,%2 \n\
stwcx. %0,0,%3 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc" );
}
void clear_bit(int nr, volatile void *addr)
{
unsigned long old;
unsigned long mask = 1 << (nr & 0x1f);
unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%3 \n\
andc %0,%0,%2 \n\
stwcx. %0,0,%3 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc");
}
void change_bit(int nr, volatile void *addr)
{
unsigned long old;
unsigned long mask = 1 << (nr & 0x1f);
unsigned long *p = ((unsigned long *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%3 \n\
xor %0,%0,%2 \n\
stwcx. %0,0,%3 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc");
}
int test_and_set_bit(int nr, volatile void *addr)
{
unsigned int old, t;
unsigned int mask = 1 << (nr & 0x1f);
volatile unsigned int *p = ((volatile unsigned int *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%4 \n\
or %1,%0,%3 \n\
stwcx. %1,0,%4 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=&r" (t), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc");
return (old & mask) != 0;
}
int test_and_clear_bit(int nr, volatile void *addr)
{
unsigned int old, t;
unsigned int mask = 1 << (nr & 0x1f);
volatile unsigned int *p = ((volatile unsigned int *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%4 \n\
andc %1,%0,%3 \n\
stwcx. %1,0,%4 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=&r" (t), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc");
return (old & mask) != 0;
}
int test_and_change_bit(int nr, volatile void *addr)
{
unsigned int old, t;
unsigned int mask = 1 << (nr & 0x1f);
volatile unsigned int *p = ((volatile unsigned int *)addr) + (nr >> 5);
__asm__ __volatile__(SMP_WMB "\n\
1: lwarx %0,0,%4 \n\
xor %1,%0,%3 \n\
stwcx. %1,0,%4 \n\
bne 1b"
SMP_MB
: "=&r" (old), "=&r" (t), "=m" (*p)
: "r" (mask), "r" (p), "m" (*p)
: "cc");
return (old & mask) != 0;
}
#endif /* !__INLINE_BITOPS */
|
