1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* atomic.h: Thankfully the V9 is at least reasonable for this 3 * stuff. 4 * 5 * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com) 6 */ 7 8 #ifndef __ARCH_SPARC64_ATOMIC__ 9 #define __ARCH_SPARC64_ATOMIC__ 10 11 #include <linux/types.h> 12 #include <asm/cmpxchg.h> 13 #include <asm/barrier.h> 14 15 #define ATOMIC64_INIT(i) { (i) } 16 17 #define atomic_read(v) READ_ONCE((v)->counter) 18 #define atomic64_read(v) READ_ONCE((v)->counter) 19 20 #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i)) 21 #define atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i)) 22 23 #define ATOMIC_OP(op) \ 24 void atomic_##op(int, atomic_t *); \ 25 void atomic64_##op(s64, atomic64_t *); 26 27 #define ATOMIC_OP_RETURN(op) \ 28 int atomic_##op##_return(int, atomic_t *); \ 29 s64 atomic64_##op##_return(s64, atomic64_t *); 30 31 #define ATOMIC_FETCH_OP(op) \ 32 int atomic_fetch_##op(int, atomic_t *); \ 33 s64 atomic64_fetch_##op(s64, atomic64_t *); 34 35 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op) 36 37 ATOMIC_OPS(add) 38 ATOMIC_OPS(sub) 39 40 #undef ATOMIC_OPS 41 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) 42 43 ATOMIC_OPS(and) 44 ATOMIC_OPS(or) 45 ATOMIC_OPS(xor) 46 47 #undef ATOMIC_OPS 48 #undef ATOMIC_FETCH_OP 49 #undef ATOMIC_OP_RETURN 50 #undef ATOMIC_OP 51 52 #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) 53 54 static inline int atomic_xchg(atomic_t *v, int new) 55 { 56 return xchg(&v->counter, new); 57 } 58 59 #define atomic64_cmpxchg(v, o, n) \ 60 ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) 61 #define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) 62 63 s64 atomic64_dec_if_positive(atomic64_t *v); 64 #define atomic64_dec_if_positive atomic64_dec_if_positive 65 66 #endif /* !(__ARCH_SPARC64_ATOMIC__) */ 67