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#ifndef SIFIVE_ATOMIC_H
#define SIFIVE_ATOMIC_H
#define ATOMIC_INIT(x) \
{ \
.counter = (x), \
}
typedef struct {
int counter;
} atomic_t;
static inline int atomic_xchg(atomic_t *v, int n)
{
register int c;
__asm__ __volatile__ (
"amoswap.w.aqrl %0, %2, %1"
: "=r" (c), "+A" (v->counter)
: "r" (n));
return c;
}
static inline void mb(void)
{
__asm__ __volatile__ ("fence");
}
#endif
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