73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_ATOMIC_IRQ_H
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#define __ASM_SH_ATOMIC_IRQ_H
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#include <linux/irqflags.h>
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/*
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* To get proper branch prediction for the main line, we must branch
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* forward to code at the end of this object's .text section, then
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* branch back to restart the operation.
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*/
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#define ATOMIC_OP(op, c_op) \
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static inline void atomic_##op(int i, atomic_t *v) \
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{ \
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unsigned long flags; \
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\
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raw_local_irq_save(flags); \
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v->counter c_op i; \
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raw_local_irq_restore(flags); \
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}
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#define ATOMIC_OP_RETURN(op, c_op) \
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static inline int atomic_##op##_return(int i, atomic_t *v) \
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{ \
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unsigned long temp, flags; \
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\
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raw_local_irq_save(flags); \
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temp = v->counter; \
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temp c_op i; \
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v->counter = temp; \
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raw_local_irq_restore(flags); \
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\
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return temp; \
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}
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#define ATOMIC_FETCH_OP(op, c_op) \
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static inline int atomic_fetch_##op(int i, atomic_t *v) \
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{ \
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unsigned long temp, flags; \
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\
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raw_local_irq_save(flags); \
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temp = v->counter; \
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v->counter c_op i; \
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raw_local_irq_restore(flags); \
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\
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return temp; \
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}
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#define ATOMIC_OPS(op, c_op) \
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ATOMIC_OP(op, c_op) \
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ATOMIC_OP_RETURN(op, c_op) \
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ATOMIC_FETCH_OP(op, c_op)
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ATOMIC_OPS(add, +=)
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ATOMIC_OPS(sub, -=)
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#undef ATOMIC_OPS
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#define ATOMIC_OPS(op, c_op) \
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ATOMIC_OP(op, c_op) \
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ATOMIC_FETCH_OP(op, c_op)
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ATOMIC_OPS(and, &=)
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ATOMIC_OPS(or, |=)
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ATOMIC_OPS(xor, ^=)
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#undef ATOMIC_OPS
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#undef ATOMIC_FETCH_OP
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#undef ATOMIC_OP_RETURN
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#undef ATOMIC_OP
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#endif /* __ASM_SH_ATOMIC_IRQ_H */
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