| /* 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 */ |
