162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Generic implementation of 64-bit atomics using spinlocks, 462306a36Sopenharmony_ci * useful on processors that don't have 64-bit atomic instructions. 562306a36Sopenharmony_ci * 662306a36Sopenharmony_ci * Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci#ifndef _ASM_GENERIC_ATOMIC64_H 962306a36Sopenharmony_ci#define _ASM_GENERIC_ATOMIC64_H 1062306a36Sopenharmony_ci#include <linux/types.h> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_citypedef struct { 1362306a36Sopenharmony_ci s64 counter; 1462306a36Sopenharmony_ci} atomic64_t; 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#define ATOMIC64_INIT(i) { (i) } 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ciextern s64 generic_atomic64_read(const atomic64_t *v); 1962306a36Sopenharmony_ciextern void generic_atomic64_set(atomic64_t *v, s64 i); 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci#define ATOMIC64_OP(op) \ 2262306a36Sopenharmony_ciextern void generic_atomic64_##op(s64 a, atomic64_t *v); 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci#define ATOMIC64_OP_RETURN(op) \ 2562306a36Sopenharmony_ciextern s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v); 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci#define ATOMIC64_FETCH_OP(op) \ 2862306a36Sopenharmony_ciextern s64 generic_atomic64_fetch_##op(s64 a, atomic64_t *v); 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op) 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ciATOMIC64_OPS(add) 3362306a36Sopenharmony_ciATOMIC64_OPS(sub) 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci#undef ATOMIC64_OPS 3662306a36Sopenharmony_ci#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op) 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ciATOMIC64_OPS(and) 3962306a36Sopenharmony_ciATOMIC64_OPS(or) 4062306a36Sopenharmony_ciATOMIC64_OPS(xor) 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci#undef ATOMIC64_OPS 4362306a36Sopenharmony_ci#undef ATOMIC64_FETCH_OP 4462306a36Sopenharmony_ci#undef ATOMIC64_OP_RETURN 4562306a36Sopenharmony_ci#undef ATOMIC64_OP 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ciextern s64 generic_atomic64_dec_if_positive(atomic64_t *v); 4862306a36Sopenharmony_ciextern s64 generic_atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n); 4962306a36Sopenharmony_ciextern s64 generic_atomic64_xchg(atomic64_t *v, s64 new); 5062306a36Sopenharmony_ciextern s64 generic_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u); 5162306a36Sopenharmony_ci 5262306a36Sopenharmony_ci#define arch_atomic64_read generic_atomic64_read 5362306a36Sopenharmony_ci#define arch_atomic64_set generic_atomic64_set 5462306a36Sopenharmony_ci#define arch_atomic64_set_release generic_atomic64_set 5562306a36Sopenharmony_ci 5662306a36Sopenharmony_ci#define arch_atomic64_add generic_atomic64_add 5762306a36Sopenharmony_ci#define arch_atomic64_add_return generic_atomic64_add_return 5862306a36Sopenharmony_ci#define arch_atomic64_fetch_add generic_atomic64_fetch_add 5962306a36Sopenharmony_ci#define arch_atomic64_sub generic_atomic64_sub 6062306a36Sopenharmony_ci#define arch_atomic64_sub_return generic_atomic64_sub_return 6162306a36Sopenharmony_ci#define arch_atomic64_fetch_sub generic_atomic64_fetch_sub 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_ci#define arch_atomic64_and generic_atomic64_and 6462306a36Sopenharmony_ci#define arch_atomic64_fetch_and generic_atomic64_fetch_and 6562306a36Sopenharmony_ci#define arch_atomic64_or generic_atomic64_or 6662306a36Sopenharmony_ci#define arch_atomic64_fetch_or generic_atomic64_fetch_or 6762306a36Sopenharmony_ci#define arch_atomic64_xor generic_atomic64_xor 6862306a36Sopenharmony_ci#define arch_atomic64_fetch_xor generic_atomic64_fetch_xor 6962306a36Sopenharmony_ci 7062306a36Sopenharmony_ci#define arch_atomic64_dec_if_positive generic_atomic64_dec_if_positive 7162306a36Sopenharmony_ci#define arch_atomic64_cmpxchg generic_atomic64_cmpxchg 7262306a36Sopenharmony_ci#define arch_atomic64_xchg generic_atomic64_xchg 7362306a36Sopenharmony_ci#define arch_atomic64_fetch_add_unless generic_atomic64_fetch_add_unless 7462306a36Sopenharmony_ci 7562306a36Sopenharmony_ci#endif /* _ASM_GENERIC_ATOMIC64_H */ 76