1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4  */
5 
6 #ifndef _ASM_ARC_ATOMIC_H
7 #define _ASM_ARC_ATOMIC_H
8 
9 #ifndef __ASSEMBLY__
10 
11 #include <linux/types.h>
12 #include <linux/compiler.h>
13 #include <asm/cmpxchg.h>
14 #include <asm/barrier.h>
15 #include <asm/smp.h>
16 
17 #define arch_atomic_read(v)  READ_ONCE((v)->counter)
18 
19 #ifdef CONFIG_ARC_HAS_LLSC
20 #include <asm/atomic-llsc.h>
21 #else
22 #include <asm/atomic-spinlock.h>
23 #endif
24 
25 #define arch_atomic_cmpxchg(v, o, n)					\
26 ({									\
27 	arch_cmpxchg(&((v)->counter), (o), (n));			\
28 })
29 
30 #ifdef arch_cmpxchg_relaxed
31 #define arch_atomic_cmpxchg_relaxed(v, o, n)				\
32 ({									\
33 	arch_cmpxchg_relaxed(&((v)->counter), (o), (n));		\
34 })
35 #endif
36 
37 #define arch_atomic_xchg(v, n)						\
38 ({									\
39 	arch_xchg(&((v)->counter), (n));				\
40 })
41 
42 #ifdef arch_xchg_relaxed
43 #define arch_atomic_xchg_relaxed(v, n)					\
44 ({									\
45 	arch_xchg_relaxed(&((v)->counter), (n));			\
46 })
47 #endif
48 
49 /*
50  * 64-bit atomics
51  */
52 #ifdef CONFIG_GENERIC_ATOMIC64
53 #include <asm-generic/atomic64.h>
54 #else
55 #include <asm/atomic64-arcv2.h>
56 #endif
57 
58 #endif	/* !__ASSEMBLY__ */
59 
60 #endif
61