arch/arc/include/asm/atomic.h

   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