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 ATOMIC_INIT(i) { (i) } 16 #define ATOMIC64_INIT(i) { (i) } 17 18 #define atomic_read(v) READ_ONCE((v)->counter) 19 #define atomic64_read(v) READ_ONCE((v)->counter) 20 21 #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i)) 22 #define atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i)) 23 24 #define ATOMIC_OP(op) \ 25 void atomic_##op(int, atomic_t *); \ 26 void atomic64_##op(s64, atomic64_t *); 27 28 #define ATOMIC_OP_RETURN(op) \ 29 int atomic_##op##_return(int, atomic_t *); \ 30 s64 atomic64_##op##_return(s64, atomic64_t *); 31 32 #define ATOMIC_FETCH_OP(op) \ 33 int atomic_fetch_##op(int, atomic_t *); \ 34 s64 atomic64_fetch_##op(s64, atomic64_t *); 35 36 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op) 37 38 ATOMIC_OPS(add) 39 ATOMIC_OPS(sub) 40 41 #undef ATOMIC_OPS 42 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) 43 44 ATOMIC_OPS(and) 45 ATOMIC_OPS(or) 46 ATOMIC_OPS(xor) 47 48 #undef ATOMIC_OPS 49 #undef ATOMIC_FETCH_OP 50 #undef ATOMIC_OP_RETURN 51 #undef ATOMIC_OP 52 53 #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) 54 55 static inline int atomic_xchg(atomic_t *v, int new) 56 { 57 return xchg(&v->counter, new); 58 } 59 60 #define atomic64_cmpxchg(v, o, n) \ 61 ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) 62 #define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) 63 64 s64 atomic64_dec_if_positive(atomic64_t *v); 65 #define atomic64_dec_if_positive atomic64_dec_if_positive 66 67 #endif /* !(__ARCH_SPARC64_ATOMIC__) */ 68