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
4static inline void atomic_add(int i, atomic_t *v)
5{
6 int tmp;
7
8 __asm__ __volatile__ (
9 " .align 2 \n\t"
10 " mova 1f, r0 \n\t" /* r0 = end point */
11 " mov r15, r1 \n\t" /* r1 = saved sp */
12 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
13 " mov.l @%1, %0 \n\t" /* load old value */
14 " add %2, %0 \n\t" /* add */
15 " mov.l %0, @%1 \n\t" /* store new value */
16 "1: mov r1, r15 \n\t" /* LOGOUT */
17 : "=&r" (tmp),
18 "+r" (v)
19 : "r" (i)
20 : "memory" , "r0", "r1");
21}
22
23static inline void atomic_sub(int i, atomic_t *v)
24{
25 int tmp;
26
27 __asm__ __volatile__ (
28 " .align 2 \n\t"
29 " mova 1f, r0 \n\t" /* r0 = end point */
30 " mov r15, r1 \n\t" /* r1 = saved sp */
31 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
32 " mov.l @%1, %0 \n\t" /* load old value */
33 " sub %2, %0 \n\t" /* sub */
34 " mov.l %0, @%1 \n\t" /* store new value */
35 "1: mov r1, r15 \n\t" /* LOGOUT */
36 : "=&r" (tmp),
37 "+r" (v)
38 : "r" (i)
39 : "memory" , "r0", "r1");
40}
41
42static inline int atomic_add_return(int i, atomic_t *v)
43{
44 int tmp;
45
46 __asm__ __volatile__ (
47 " .align 2 \n\t"
48 " mova 1f, r0 \n\t" /* r0 = end point */
49 " mov r15, r1 \n\t" /* r1 = saved sp */
50 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
51 " mov.l @%1, %0 \n\t" /* load old value */
52 " add %2, %0 \n\t" /* add */
53 " mov.l %0, @%1 \n\t" /* store new value */
54 "1: mov r1, r15 \n\t" /* LOGOUT */
55 : "=&r" (tmp),
56 "+r" (v)
57 : "r" (i)
58 : "memory" , "r0", "r1");
59
60 return tmp;
61}
62
63static inline int atomic_sub_return(int i, atomic_t *v)
64{
65 int tmp;
66
67 __asm__ __volatile__ (
68 " .align 2 \n\t"
69 " mova 1f, r0 \n\t" /* r0 = end point */
70 " mov r15, r1 \n\t" /* r1 = saved sp */
71 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
72 " mov.l @%1, %0 \n\t" /* load old value */
73 " sub %2, %0 \n\t" /* sub */
74 " mov.l %0, @%1 \n\t" /* store new value */
75 "1: mov r1, r15 \n\t" /* LOGOUT */
76 : "=&r" (tmp),
77 "+r" (v)
78 : "r" (i)
79 : "memory", "r0", "r1");
80
81 return tmp;
82}
83
84static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
85{
86 int tmp;
87 unsigned int _mask = ~mask;
88
89 __asm__ __volatile__ (
90 " .align 2 \n\t"
91 " mova 1f, r0 \n\t" /* r0 = end point */
92 " mov r15, r1 \n\t" /* r1 = saved sp */
93 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
94 " mov.l @%1, %0 \n\t" /* load old value */
95 " and %2, %0 \n\t" /* add */
96 " mov.l %0, @%1 \n\t" /* store new value */
97 "1: mov r1, r15 \n\t" /* LOGOUT */
98 : "=&r" (tmp),
99 "+r" (v)
100 : "r" (_mask)
101 : "memory" , "r0", "r1");
102}
103
104static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
105{
106 int tmp;
107
108 __asm__ __volatile__ (
109 " .align 2 \n\t"
110 " mova 1f, r0 \n\t" /* r0 = end point */
111 " mov r15, r1 \n\t" /* r1 = saved sp */
112 " mov #-6, r15 \n\t" /* LOGIN: r15 = size */
113 " mov.l @%1, %0 \n\t" /* load old value */
114 " or %2, %0 \n\t" /* or */
115 " mov.l %0, @%1 \n\t" /* store new value */
116 "1: mov r1, r15 \n\t" /* LOGOUT */
117 : "=&r" (tmp),
118 "+r" (v)
119 : "r" (mask)
120 : "memory" , "r0", "r1");
121}
122
123static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
124{
125 int ret;
126
127 __asm__ __volatile__ (
128 " .align 2 \n\t"
129 " mova 1f, r0 \n\t"
130 " nop \n\t"
131 " mov r15, r1 \n\t"
132 " mov #-8, r15 \n\t"
133 " mov.l @%1, %0 \n\t"
134 " cmp/eq %2, %0 \n\t"
135 " bf 1f \n\t"
136 " mov.l %3, @%1 \n\t"
137 "1: mov r1, r15 \n\t"
138 : "=&r" (ret)
139 : "r" (v), "r" (old), "r" (new)
140 : "memory" , "r0", "r1" , "t");
141
142 return ret;
143}
144
145static inline int atomic_add_unless(atomic_t *v, int a, int u)
146{
147 int ret;
148 unsigned long tmp;
149
150 __asm__ __volatile__ (
151 " .align 2 \n\t"
152 " mova 1f, r0 \n\t"
153 " nop \n\t"
154 " mov r15, r1 \n\t"
155 " mov #-12, r15 \n\t"
156 " mov.l @%2, %1 \n\t"
157 " mov %1, %0 \n\t"
158 " cmp/eq %4, %0 \n\t"
159 " bt/s 1f \n\t"
160 " add %3, %1 \n\t"
161 " mov.l %1, @%2 \n\t"
162 "1: mov r1, r15 \n\t"
163 : "=&r" (ret), "=&r" (tmp)
164 : "r" (v), "r" (a), "r" (u)
165 : "memory" , "r0", "r1" , "t");
166
167 return ret != u;
168}
169#endif /* __ASM_SH_ATOMIC_GRB_H */