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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2b47d54e RF |
2 | #ifndef __ASM_SH_BITOPS_CAS_H |
3 | #define __ASM_SH_BITOPS_CAS_H | |
4 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 */ |