LXR linux/arch/sparc/include/asm/atomic

   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)                                                   \
  24void arch_atomic_##op(int, atomic_t *);                                 \
  25void arch_atomic64_##op(s64, atomic64_t *);
  26
  27#define ATOMIC_OP_RETURN(op)                                            \
  28int arch_atomic_##op##_return(int, atomic_t *);                         \
  29s64 arch_atomic64_##op##_return(s64, atomic64_t *);
  30
  31#define ATOMIC_FETCH_OP(op)                                             \
  32int arch_atomic_fetch_##op(int, atomic_t *);                            \
  33s64 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
  37ATOMIC_OPS(add)
  38ATOMIC_OPS(sub)
  39
  40#undef ATOMIC_OPS
  41#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
  42
  43ATOMIC_OPS(and)
  44ATOMIC_OPS(or)
  45ATOMIC_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
  54static 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
  63s64 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__) */
  67