/* 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. <[email protected]>
 */
#ifndef _ASM_GENERIC_ATOMIC64_H
#define _ASM_GENERIC_ATOMIC64_H
#include <linux/types.h>

#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

#define arch_atomic64_read_unchecked(v)            arch_atomic64_read(v)
#define arch_atomic64_set_unchecked(v, i)        arch_atomic64_set((v), (i))
#define arch_atomic64_add_unchecked(a, v)        arch_atomic64_add((a), (v))
#define arch_atomic64_add_return_unchecked(a, v)    arch_atomic64_add_return((a), (v))
#define arch_atomic64_fetch_add_unchecked(a, v)        arch_atomic64_fetch_add((a), (v))
#define arch_atomic64_sub_unchecked(a, v)        arch_atomic64_sub((a), (v))
#define arch_atomic64_sub_return_unchecked(a, v)    arch_atomic64_sub_return((a), (v))
#define arch_atomic64_cmpxchg_unchecked(v, o, n)    arch_atomic64_cmpxchg((v), (o), (n))
#define arch_atomic64_xchg_unchecked(v, n)        arch_atomic64_xchg((v), (n))

#endif  /*  _ASM_GENERIC_ATOMIC64_H  */