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72 lines
1.6 KiB
72 lines
1.6 KiB
/* 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 arch_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 arch_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 arch_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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