arch/sparc/include/asm/atomic_64.h

   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 ATOMIC64_INIT(i)        { (i) }
  16
  17 #define arch_atomic_read(v)     READ_ONCE((v)->counter)
  18 #define arch_atomic64_read(v)   READ_ONCE((v)->counter)
  19
  20 #define arch_atomic_set(v, i)   WRITE_ONCE(((v)->counter), (i))
  21 #define arch_atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i))
  22
  23 #define ATOMIC_OP(op)                                                   \
  24 void arch_atomic_##op(int, atomic_t *);                                 \
  25 void arch_atomic64_##op(s64, atomic64_t *);
  26
  27 #define ATOMIC_OP_RETURN(op)                                            \
  28 int arch_atomic_##op##_return(int, atomic_t *);                         \
  29 s64 arch_atomic64_##op##_return(s64, atomic64_t *);
  30
  31 #define ATOMIC_FETCH_OP(op)                                             \
  32 int arch_atomic_fetch_##op(int, atomic_t *);                            \
  33 s64 arch_atomic64_fetch_##op(s64, atomic64_t *);
  34
  35 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
  36
  37 ATOMIC_OPS(add)
  38 ATOMIC_OPS(sub)
  39
  40 #undef ATOMIC_OPS
  41 #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
  42
  43 ATOMIC_OPS(and)
  44 ATOMIC_OPS(or)
  45 ATOMIC_OPS(xor)
  46
  47 #undef ATOMIC_OPS
  48 #undef ATOMIC_FETCH_OP
  49 #undef ATOMIC_OP_RETURN
  50 #undef ATOMIC_OP
  51
  52 #define arch_atomic_cmpxchg(v, o, n) (arch_cmpxchg(&((v)->counter), (o), (n)))
  53
  54 static inline int arch_atomic_xchg(atomic_t *v, int new)
  55 {
  56         return arch_xchg(&v->counter, new);
  57 }
  58
  59 #define arch_atomic64_cmpxchg(v, o, n) \
  60         ((__typeof__((v)->counter))arch_cmpxchg(&((v)->counter), (o), (n)))
  61 #define arch_atomic64_xchg(v, new) (arch_xchg(&((v)->counter), new))
  62
  63 s64 arch_atomic64_dec_if_positive(atomic64_t *v);
  64 #define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive
  65
  66 #endif /* !(__ARCH_SPARC64_ATOMIC__) */