1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* atomic.h: These still suck, but the I-cache hit rate is higher. 3 * 4 * Copyright (C) 1996 David S. Miller (davem@davemloft.net) 5 * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au) 6 * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org) 7 * 8 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based 9 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>. 10 */ 11 12 #ifndef __ARCH_SPARC_ATOMIC__ 13 #define __ARCH_SPARC_ATOMIC__ 14 15 #include <linux/types.h> 16 17 #include <asm/cmpxchg.h> 18 #include <asm/barrier.h> 19 #include <asm-generic/atomic64.h> 20 21 int atomic_add_return(int, atomic_t *); 22 int atomic_fetch_add(int, atomic_t *); 23 int atomic_fetch_and(int, atomic_t *); 24 int atomic_fetch_or(int, atomic_t *); 25 int atomic_fetch_xor(int, atomic_t *); 26 int atomic_cmpxchg(atomic_t *, int, int); 27 int atomic_xchg(atomic_t *, int); 28 int atomic_fetch_add_unless(atomic_t *, int, int); 29 void atomic_set(atomic_t *, int); 30 31 #define atomic_fetch_add_unless atomic_fetch_add_unless 32 33 #define atomic_set_release(v, i) atomic_set((v), (i)) 34 35 #define atomic_read(v) READ_ONCE((v)->counter) 36 37 #define atomic_add(i, v) ((void)atomic_add_return( (int)(i), (v))) 38 #define atomic_sub(i, v) ((void)atomic_add_return(-(int)(i), (v))) 39 40 #define atomic_and(i, v) ((void)atomic_fetch_and((i), (v))) 41 #define atomic_or(i, v) ((void)atomic_fetch_or((i), (v))) 42 #define atomic_xor(i, v) ((void)atomic_fetch_xor((i), (v))) 43 44 #define atomic_sub_return(i, v) (atomic_add_return(-(int)(i), (v))) 45 #define atomic_fetch_sub(i, v) (atomic_fetch_add (-(int)(i), (v))) 46 47 #endif /* !(__ARCH_SPARC_ATOMIC__) */ 48