include/asm/atomic.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
0004  */
0005
0006 #ifndef _ASM_ARC_ATOMIC_H
0007 #define _ASM_ARC_ATOMIC_H
0008
0009 #ifndef __ASSEMBLY__
0010
0011 #include <linux/types.h>
0012 #include <linux/compiler.h>
0013 #include <asm/cmpxchg.h>
0014 #include <asm/barrier.h>
0015 #include <asm/smp.h>
0016
0017 #define arch_atomic_read(v)  READ_ONCE((v)->counter)
0018
0019 #ifdef CONFIG_ARC_HAS_LLSC
0020 #include <asm/atomic-llsc.h>
0021 #else
0022 #include <asm/atomic-spinlock.h>
0023 #endif
0024
0025 #define arch_atomic_cmpxchg(v, o, n)                    \
0026 ({                                  \
0027     arch_cmpxchg(&((v)->counter), (o), (n));            \
0028 })
0029
0030 #ifdef arch_cmpxchg_relaxed
0031 #define arch_atomic_cmpxchg_relaxed(v, o, n)                \
0032 ({                                  \
0033     arch_cmpxchg_relaxed(&((v)->counter), (o), (n));        \
0034 })
0035 #endif
0036
0037 #define arch_atomic_xchg(v, n)                      \
0038 ({                                  \
0039     arch_xchg(&((v)->counter), (n));                \
0040 })
0041
0042 #ifdef arch_xchg_relaxed
0043 #define arch_atomic_xchg_relaxed(v, n)                  \
0044 ({                                  \
0045     arch_xchg_relaxed(&((v)->counter), (n));            \
0046 })
0047 #endif
0048
0049 /*
0050  * 64-bit atomics
0051  */
0052 #ifdef CONFIG_GENERIC_ATOMIC64
0053 #include <asm-generic/atomic64.h>
0054 #else
0055 #include <asm/atomic64-arcv2.h>
0056 #endif
0057
0058 #endif  /* !__ASSEMBLY__ */
0059
0060 #endif