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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Generic implementation of 64-bit atomics using spinlocks,
* useful on processors that don't have 64-bit atomic instructions.
*
* Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
*/
#ifndef _ASM_GENERIC_ATOMIC64_H
#define _ASM_GENERIC_ATOMIC64_H
#include <linux/types.h>
typedef struct {
s64 counter;
} atomic64_t;
#define ATOMIC64_INIT(i) { (i) }
extern s64 generic_atomic64_read(const atomic64_t *v);
extern void generic_atomic64_set(atomic64_t *v, s64 i);
#define ATOMIC64_OP(op) \
extern void generic_atomic64_##op(s64 a, atomic64_t *v);
#define ATOMIC64_OP_RETURN(op) \
extern s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v);
#define ATOMIC64_FETCH_OP(op) \
extern s64 generic_atomic64_fetch_##op(s64 a, atomic64_t *v);
#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op)
ATOMIC64_OPS(add)
ATOMIC64_OPS(sub)
#undef ATOMIC64_OPS
#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op)
ATOMIC64_OPS(and)
ATOMIC64_OPS(or)
ATOMIC64_OPS(xor)
#undef ATOMIC64_OPS
#undef ATOMIC64_FETCH_OP
#undef ATOMIC64_OP_RETURN
#undef ATOMIC64_OP
extern s64 generic_atomic64_dec_if_positive(atomic64_t *v);
extern s64 generic_atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n);
extern s64 generic_atomic64_xchg(atomic64_t *v, s64 new);
extern s64 generic_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u);
#define arch_atomic64_read generic_atomic64_read
#define arch_atomic64_set generic_atomic64_set
#define arch_atomic64_set_release generic_atomic64_set
#define arch_atomic64_add generic_atomic64_add
#define arch_atomic64_add_return generic_atomic64_add_return
#define arch_atomic64_fetch_add generic_atomic64_fetch_add
#define arch_atomic64_sub generic_atomic64_sub
#define arch_atomic64_sub_return generic_atomic64_sub_return
#define arch_atomic64_fetch_sub generic_atomic64_fetch_sub
#define arch_atomic64_and generic_atomic64_and
#define arch_atomic64_fetch_and generic_atomic64_fetch_and
#define arch_atomic64_or generic_atomic64_or
#define arch_atomic64_fetch_or generic_atomic64_fetch_or
#define arch_atomic64_xor generic_atomic64_xor
#define arch_atomic64_fetch_xor generic_atomic64_fetch_xor
#define arch_atomic64_dec_if_positive generic_atomic64_dec_if_positive
#define arch_atomic64_cmpxchg generic_atomic64_cmpxchg
#define arch_atomic64_xchg generic_atomic64_xchg
#define arch_atomic64_fetch_add_unless generic_atomic64_fetch_add_unless
#endif /* _ASM_GENERIC_ATOMIC64_H */