1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_ATOMIC_IRQ_H
 3#define __ASM_SH_ATOMIC_IRQ_H
 4
 5#include <linux/irqflags.h>
 6
 7/*
 8 * To get proper branch prediction for the main line, we must branch
 9 * forward to code at the end of this object's .text section, then
10 * branch back to restart the operation.
11 */
12
13#define ATOMIC_OP(op, c_op)						\
14static inline void arch_atomic_##op(int i, atomic_t *v)			\
15{									\
16	unsigned long flags;						\
17									\
18	raw_local_irq_save(flags);					\
19	v->counter c_op i;						\
20	raw_local_irq_restore(flags);					\
21}
22
23#define ATOMIC_OP_RETURN(op, c_op)					\
24static inline int arch_atomic_##op##_return(int i, atomic_t *v)		\
25{									\
26	unsigned long temp, flags;					\
27									\
28	raw_local_irq_save(flags);					\
29	temp = v->counter;						\
30	temp c_op i;							\
31	v->counter = temp;						\
32	raw_local_irq_restore(flags);					\
33									\
34	return temp;							\
35}
36
37#define ATOMIC_FETCH_OP(op, c_op)					\
38static inline int arch_atomic_fetch_##op(int i, atomic_t *v)		\
39{									\
40	unsigned long temp, flags;					\
41									\
42	raw_local_irq_save(flags);					\
43	temp = v->counter;						\
44	v->counter c_op i;						\
45	raw_local_irq_restore(flags);					\
46									\
47	return temp;							\
48}
49
50#define ATOMIC_OPS(op, c_op)						\
51	ATOMIC_OP(op, c_op)						\
52	ATOMIC_OP_RETURN(op, c_op)					\
53	ATOMIC_FETCH_OP(op, c_op)
54
55ATOMIC_OPS(add, +=)
56ATOMIC_OPS(sub, -=)
57
58#undef ATOMIC_OPS
59#define ATOMIC_OPS(op, c_op)						\
60	ATOMIC_OP(op, c_op)						\
61	ATOMIC_FETCH_OP(op, c_op)
62
63ATOMIC_OPS(and, &=)
64ATOMIC_OPS(or, |=)
65ATOMIC_OPS(xor, ^=)
66
67#undef ATOMIC_OPS
68#undef ATOMIC_FETCH_OP
69#undef ATOMIC_OP_RETURN
70#undef ATOMIC_OP
71
72#endif /* __ASM_SH_ATOMIC_IRQ_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_ATOMIC_IRQ_H
 3#define __ASM_SH_ATOMIC_IRQ_H
 4
 5#include <linux/irqflags.h>
 6
 7/*
 8 * To get proper branch prediction for the main line, we must branch
 9 * forward to code at the end of this object's .text section, then
10 * branch back to restart the operation.
11 */
12
13#define ATOMIC_OP(op, c_op)						\
14static inline void arch_atomic_##op(int i, atomic_t *v)			\
15{									\
16	unsigned long flags;						\
17									\
18	raw_local_irq_save(flags);					\
19	v->counter c_op i;						\
20	raw_local_irq_restore(flags);					\
21}
22
23#define ATOMIC_OP_RETURN(op, c_op)					\
24static inline int arch_atomic_##op##_return(int i, atomic_t *v)		\
25{									\
26	unsigned long temp, flags;					\
27									\
28	raw_local_irq_save(flags);					\
29	temp = v->counter;						\
30	temp c_op i;							\
31	v->counter = temp;						\
32	raw_local_irq_restore(flags);					\
33									\
34	return temp;							\
35}
36
37#define ATOMIC_FETCH_OP(op, c_op)					\
38static inline int arch_atomic_fetch_##op(int i, atomic_t *v)		\
39{									\
40	unsigned long temp, flags;					\
41									\
42	raw_local_irq_save(flags);					\
43	temp = v->counter;						\
44	v->counter c_op i;						\
45	raw_local_irq_restore(flags);					\
46									\
47	return temp;							\
48}
49
50#define ATOMIC_OPS(op, c_op)						\
51	ATOMIC_OP(op, c_op)						\
52	ATOMIC_OP_RETURN(op, c_op)					\
53	ATOMIC_FETCH_OP(op, c_op)
54
55ATOMIC_OPS(add, +=)
56ATOMIC_OPS(sub, -=)
57
58#undef ATOMIC_OPS
59#define ATOMIC_OPS(op, c_op)						\
60	ATOMIC_OP(op, c_op)						\
61	ATOMIC_FETCH_OP(op, c_op)
62
63ATOMIC_OPS(and, &=)
64ATOMIC_OPS(or, |=)
65ATOMIC_OPS(xor, ^=)
66
67#undef ATOMIC_OPS
68#undef ATOMIC_FETCH_OP
69#undef ATOMIC_OP_RETURN
70#undef ATOMIC_OP
71
72#endif /* __ASM_SH_ATOMIC_IRQ_H */