1 #ifndef __ASM_SH_BITOPS_CAS_H
2 #define __ASM_SH_BITOPS_CAS_H
3
__bo_cas(volatile unsigned * p,unsigned old,unsigned new)4 static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new)
5 {
6 __asm__ __volatile__("cas.l %1,%0,@r0"
7 : "+r"(new)
8 : "r"(old), "z"(p)
9 : "t", "memory" );
10 return new;
11 }
12
set_bit(int nr,volatile void * addr)13 static inline void set_bit(int nr, volatile void *addr)
14 {
15 unsigned mask, old;
16 volatile unsigned *a = addr;
17
18 a += nr >> 5;
19 mask = 1U << (nr & 0x1f);
20
21 do old = *a;
22 while (__bo_cas(a, old, old|mask) != old);
23 }
24
clear_bit(int nr,volatile void * addr)25 static inline void clear_bit(int nr, volatile void *addr)
26 {
27 unsigned mask, old;
28 volatile unsigned *a = addr;
29
30 a += nr >> 5;
31 mask = 1U << (nr & 0x1f);
32
33 do old = *a;
34 while (__bo_cas(a, old, old&~mask) != old);
35 }
36
change_bit(int nr,volatile void * addr)37 static inline void change_bit(int nr, volatile void *addr)
38 {
39 unsigned mask, old;
40 volatile unsigned *a = addr;
41
42 a += nr >> 5;
43 mask = 1U << (nr & 0x1f);
44
45 do old = *a;
46 while (__bo_cas(a, old, old^mask) != old);
47 }
48
test_and_set_bit(int nr,volatile void * addr)49 static inline int test_and_set_bit(int nr, volatile void *addr)
50 {
51 unsigned mask, old;
52 volatile unsigned *a = addr;
53
54 a += nr >> 5;
55 mask = 1U << (nr & 0x1f);
56
57 do old = *a;
58 while (__bo_cas(a, old, old|mask) != old);
59
60 return !!(old & mask);
61 }
62
test_and_clear_bit(int nr,volatile void * addr)63 static inline int test_and_clear_bit(int nr, volatile void *addr)
64 {
65 unsigned mask, old;
66 volatile unsigned *a = addr;
67
68 a += nr >> 5;
69 mask = 1U << (nr & 0x1f);
70
71 do old = *a;
72 while (__bo_cas(a, old, old&~mask) != old);
73
74 return !!(old & mask);
75 }
76
test_and_change_bit(int nr,volatile void * addr)77 static inline int test_and_change_bit(int nr, volatile void *addr)
78 {
79 unsigned mask, old;
80 volatile unsigned *a = addr;
81
82 a += nr >> 5;
83 mask = 1U << (nr & 0x1f);
84
85 do old = *a;
86 while (__bo_cas(a, old, old^mask) != old);
87
88 return !!(old & mask);
89 }
90
91 #include <asm-generic/bitops/non-atomic.h>
92
93 #endif /* __ASM_SH_BITOPS_CAS_H */
94