tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_SH_ATOMIC_GRB_H
2#define __ASM_SH_ATOMIC_GRB_H
3
4#define ATOMIC_OP(op) \
5static inline void atomic_##op(int i, atomic_t *v) \
6{ \
7 int tmp; \
8 \
9 __asm__ __volatile__ ( \
10 " .align 2 \n\t" \
11 " mova 1f, r0 \n\t" /* r0 = end point */ \
12 " mov r15, r1 \n\t" /* r1 = saved sp */ \
13 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */ \
14 " mov.l @%1, %0 \n\t" /* load old value */ \
15 " " #op " %2, %0 \n\t" /* $op */ \
16 " mov.l %0, @%1 \n\t" /* store new value */ \
17 "1: mov r1, r15 \n\t" /* LOGOUT */ \
18 : "=&r" (tmp), \
19 "+r" (v) \
20 : "r" (i) \
21 : "memory" , "r0", "r1"); \
22} \
23
24#define ATOMIC_OP_RETURN(op) \
25static inline int atomic_##op##_return(int i, atomic_t *v) \
26{ \
27 int tmp; \
28 \
29 __asm__ __volatile__ ( \
30 " .align 2 \n\t" \
31 " mova 1f, r0 \n\t" /* r0 = end point */ \
32 " mov r15, r1 \n\t" /* r1 = saved sp */ \
33 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */ \
34 " mov.l @%1, %0 \n\t" /* load old value */ \
35 " " #op " %2, %0 \n\t" /* $op */ \
36 " mov.l %0, @%1 \n\t" /* store new value */ \
37 "1: mov r1, r15 \n\t" /* LOGOUT */ \
38 : "=&r" (tmp), \
39 "+r" (v) \
40 : "r" (i) \
41 : "memory" , "r0", "r1"); \
42 \
43 return tmp; \
44}
45
46#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op)
47
48ATOMIC_OPS(add)
49ATOMIC_OPS(sub)
50
51ATOMIC_OP(and)
52ATOMIC_OP(or)
53ATOMIC_OP(xor)
54
55#undef ATOMIC_OPS
56#undef ATOMIC_OP_RETURN
57#undef ATOMIC_OP
58
59#endif /* __ASM_SH_ATOMIC_GRB_H */