1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_BITOPS_CAS_H
3 #define __ASM_SH_BITOPS_CAS_H
4
__bo_cas(volatile unsigned * p,unsigned old,unsigned new)5 static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new)
6 {
7 __asm__ __volatile__("cas.l %1,%0,@r0"
8 : "+r"(new)
9 : "r"(old), "z"(p)
10 : "t", "memory" );
11 return new;
12 }
13
set_bit(int nr,volatile void * addr)14 static inline void set_bit(int nr, volatile void *addr)
15 {
16 unsigned mask, old;
17 volatile unsigned *a = addr;
18
19 a += nr >> 5;
20 mask = 1U << (nr & 0x1f);
21
22 do old = *a;
23 while (__bo_cas(a, old, old|mask) != old);
24 }
25
clear_bit(int nr,volatile void * addr)26 static inline void clear_bit(int nr, volatile void *addr)
27 {
28 unsigned mask, old;
29 volatile unsigned *a = addr;
30
31 a += nr >> 5;
32 mask = 1U << (nr & 0x1f);
33
34 do old = *a;
35 while (__bo_cas(a, old, old&~mask) != old);
36 }
37
change_bit(int nr,volatile void * addr)38 static inline void change_bit(int nr, volatile void *addr)
39 {
40 unsigned mask, old;
41 volatile unsigned *a = addr;
42
43 a += nr >> 5;
44 mask = 1U << (nr & 0x1f);
45
46 do old = *a;
47 while (__bo_cas(a, old, old^mask) != old);
48 }
49
test_and_set_bit(int nr,volatile void * addr)50 static inline int test_and_set_bit(int nr, volatile void *addr)
51 {
52 unsigned mask, old;
53 volatile unsigned *a = addr;
54
55 a += nr >> 5;
56 mask = 1U << (nr & 0x1f);
57
58 do old = *a;
59 while (__bo_cas(a, old, old|mask) != old);
60
61 return !!(old & mask);
62 }
63
test_and_clear_bit(int nr,volatile void * addr)64 static inline int test_and_clear_bit(int nr, volatile void *addr)
65 {
66 unsigned mask, old;
67 volatile unsigned *a = addr;
68
69 a += nr >> 5;
70 mask = 1U << (nr & 0x1f);
71
72 do old = *a;
73 while (__bo_cas(a, old, old&~mask) != old);
74
75 return !!(old & mask);
76 }
77
test_and_change_bit(int nr,volatile void * addr)78 static inline int test_and_change_bit(int nr, volatile void *addr)
79 {
80 unsigned mask, old;
81 volatile unsigned *a = addr;
82
83 a += nr >> 5;
84 mask = 1U << (nr & 0x1f);
85
86 do old = *a;
87 while (__bo_cas(a, old, old^mask) != old);
88
89 return !!(old & mask);
90 }
91
92 #include <asm-generic/bitops/non-atomic.h>
93
94 #endif /* __ASM_SH_BITOPS_CAS_H */
95