1*461f4568SChris Packham /* SPDX-License-Identifier: GPL-2.0+ */
2*461f4568SChris Packham
3*461f4568SChris Packham #ifndef _ASM_GENERIC_ATOMIC_H
4*461f4568SChris Packham #define _ASM_GENERIC_ATOMIC_H
5*461f4568SChris Packham
6*461f4568SChris Packham typedef struct { volatile int counter; } atomic_t;
7*461f4568SChris Packham #if BITS_PER_LONG == 32
8*461f4568SChris Packham typedef struct { volatile long long counter; } atomic64_t;
9*461f4568SChris Packham #else /* BIT_PER_LONG == 32 */
10*461f4568SChris Packham typedef struct { volatile long counter; } atomic64_t;
11*461f4568SChris Packham #endif
12*461f4568SChris Packham
13*461f4568SChris Packham #define ATOMIC_INIT(i) { (i) }
14*461f4568SChris Packham
15*461f4568SChris Packham #define atomic_read(v) ((v)->counter)
16*461f4568SChris Packham #define atomic_set(v, i) ((v)->counter = (i))
17*461f4568SChris Packham #define atomic64_read(v) atomic_read(v)
18*461f4568SChris Packham #define atomic64_set(v, i) atomic_set(v, i)
19*461f4568SChris Packham
atomic_add(int i,atomic_t * v)20*461f4568SChris Packham static inline void atomic_add(int i, atomic_t *v)
21*461f4568SChris Packham {
22*461f4568SChris Packham unsigned long flags = 0;
23*461f4568SChris Packham
24*461f4568SChris Packham local_irq_save(flags);
25*461f4568SChris Packham v->counter += i;
26*461f4568SChris Packham local_irq_restore(flags);
27*461f4568SChris Packham }
28*461f4568SChris Packham
atomic_sub(int i,atomic_t * v)29*461f4568SChris Packham static inline void atomic_sub(int i, atomic_t *v)
30*461f4568SChris Packham {
31*461f4568SChris Packham unsigned long flags = 0;
32*461f4568SChris Packham
33*461f4568SChris Packham local_irq_save(flags);
34*461f4568SChris Packham v->counter -= i;
35*461f4568SChris Packham local_irq_restore(flags);
36*461f4568SChris Packham }
37*461f4568SChris Packham
atomic_inc(atomic_t * v)38*461f4568SChris Packham static inline void atomic_inc(atomic_t *v)
39*461f4568SChris Packham {
40*461f4568SChris Packham unsigned long flags = 0;
41*461f4568SChris Packham
42*461f4568SChris Packham local_irq_save(flags);
43*461f4568SChris Packham ++v->counter;
44*461f4568SChris Packham local_irq_restore(flags);
45*461f4568SChris Packham }
46*461f4568SChris Packham
atomic_dec(atomic_t * v)47*461f4568SChris Packham static inline void atomic_dec(atomic_t *v)
48*461f4568SChris Packham {
49*461f4568SChris Packham unsigned long flags = 0;
50*461f4568SChris Packham
51*461f4568SChris Packham local_irq_save(flags);
52*461f4568SChris Packham --v->counter;
53*461f4568SChris Packham local_irq_restore(flags);
54*461f4568SChris Packham }
55*461f4568SChris Packham
atomic_dec_and_test(volatile atomic_t * v)56*461f4568SChris Packham static inline int atomic_dec_and_test(volatile atomic_t *v)
57*461f4568SChris Packham {
58*461f4568SChris Packham unsigned long flags = 0;
59*461f4568SChris Packham int val;
60*461f4568SChris Packham
61*461f4568SChris Packham local_irq_save(flags);
62*461f4568SChris Packham val = v->counter;
63*461f4568SChris Packham v->counter = val -= 1;
64*461f4568SChris Packham local_irq_restore(flags);
65*461f4568SChris Packham
66*461f4568SChris Packham return val == 0;
67*461f4568SChris Packham }
68*461f4568SChris Packham
atomic_add_negative(int i,volatile atomic_t * v)69*461f4568SChris Packham static inline int atomic_add_negative(int i, volatile atomic_t *v)
70*461f4568SChris Packham {
71*461f4568SChris Packham unsigned long flags = 0;
72*461f4568SChris Packham int val;
73*461f4568SChris Packham
74*461f4568SChris Packham local_irq_save(flags);
75*461f4568SChris Packham val = v->counter;
76*461f4568SChris Packham v->counter = val += i;
77*461f4568SChris Packham local_irq_restore(flags);
78*461f4568SChris Packham
79*461f4568SChris Packham return val < 0;
80*461f4568SChris Packham }
81*461f4568SChris Packham
atomic_clear_mask(unsigned long mask,unsigned long * addr)82*461f4568SChris Packham static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
83*461f4568SChris Packham {
84*461f4568SChris Packham unsigned long flags = 0;
85*461f4568SChris Packham
86*461f4568SChris Packham local_irq_save(flags);
87*461f4568SChris Packham *addr &= ~mask;
88*461f4568SChris Packham local_irq_restore(flags);
89*461f4568SChris Packham }
90*461f4568SChris Packham
91*461f4568SChris Packham #if BITS_PER_LONG == 32
92*461f4568SChris Packham
atomic64_add(long long i,volatile atomic64_t * v)93*461f4568SChris Packham static inline void atomic64_add(long long i, volatile atomic64_t *v)
94*461f4568SChris Packham {
95*461f4568SChris Packham unsigned long flags = 0;
96*461f4568SChris Packham
97*461f4568SChris Packham local_irq_save(flags);
98*461f4568SChris Packham v->counter += i;
99*461f4568SChris Packham local_irq_restore(flags);
100*461f4568SChris Packham }
101*461f4568SChris Packham
atomic64_sub(long long i,volatile atomic64_t * v)102*461f4568SChris Packham static inline void atomic64_sub(long long i, volatile atomic64_t *v)
103*461f4568SChris Packham {
104*461f4568SChris Packham unsigned long flags = 0;
105*461f4568SChris Packham
106*461f4568SChris Packham local_irq_save(flags);
107*461f4568SChris Packham v->counter -= i;
108*461f4568SChris Packham local_irq_restore(flags);
109*461f4568SChris Packham }
110*461f4568SChris Packham
111*461f4568SChris Packham #else /* BIT_PER_LONG == 32 */
112*461f4568SChris Packham
atomic64_add(long i,volatile atomic64_t * v)113*461f4568SChris Packham static inline void atomic64_add(long i, volatile atomic64_t *v)
114*461f4568SChris Packham {
115*461f4568SChris Packham unsigned long flags = 0;
116*461f4568SChris Packham
117*461f4568SChris Packham local_irq_save(flags);
118*461f4568SChris Packham v->counter += i;
119*461f4568SChris Packham local_irq_restore(flags);
120*461f4568SChris Packham }
121*461f4568SChris Packham
atomic64_sub(long i,volatile atomic64_t * v)122*461f4568SChris Packham static inline void atomic64_sub(long i, volatile atomic64_t *v)
123*461f4568SChris Packham {
124*461f4568SChris Packham unsigned long flags = 0;
125*461f4568SChris Packham
126*461f4568SChris Packham local_irq_save(flags);
127*461f4568SChris Packham v->counter -= i;
128*461f4568SChris Packham local_irq_restore(flags);
129*461f4568SChris Packham }
130*461f4568SChris Packham #endif
131*461f4568SChris Packham
atomic64_inc(volatile atomic64_t * v)132*461f4568SChris Packham static inline void atomic64_inc(volatile atomic64_t *v)
133*461f4568SChris Packham {
134*461f4568SChris Packham unsigned long flags = 0;
135*461f4568SChris Packham
136*461f4568SChris Packham local_irq_save(flags);
137*461f4568SChris Packham v->counter += 1;
138*461f4568SChris Packham local_irq_restore(flags);
139*461f4568SChris Packham }
140*461f4568SChris Packham
atomic64_dec(volatile atomic64_t * v)141*461f4568SChris Packham static inline void atomic64_dec(volatile atomic64_t *v)
142*461f4568SChris Packham {
143*461f4568SChris Packham unsigned long flags = 0;
144*461f4568SChris Packham
145*461f4568SChris Packham local_irq_save(flags);
146*461f4568SChris Packham v->counter -= 1;
147*461f4568SChris Packham local_irq_restore(flags);
148*461f4568SChris Packham }
149*461f4568SChris Packham
150*461f4568SChris Packham #endif
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