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/* $OpenBSD: atomic.h,v 1.8 2011/03/23 16:54:35 pirofti Exp $ */
/* Public Domain */
#ifndef _M88K_ATOMIC_H_
#define _M88K_ATOMIC_H_
#if defined(_KERNEL)
#ifdef MULTIPROCESSOR
/* actual implementation is hairy, see atomic.S */
void atomic_setbits_int(__volatile unsigned int *, unsigned int);
void atomic_clearbits_int(__volatile unsigned int *, unsigned int);
#else
#include <machine/asm_macro.h>
#include <machine/psl.h>
static __inline void
atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
{
u_int psr;
psr = get_psr();
set_psr(psr | PSR_IND);
*uip |= v;
set_psr(psr);
}
static __inline void
atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
{
u_int psr;
psr = get_psr();
set_psr(psr | PSR_IND);
*uip &= ~v;
set_psr(psr);
}
#endif /* MULTIPROCESSOR */
static __inline__ unsigned int
atomic_clear_int(__volatile unsigned int *uip)
{
u_int oldval;
oldval = 0;
__asm__ __volatile__
("xmem %0, %2, r0" : "+r"(oldval), "+m"(*uip) : "r"(uip));
return oldval;
}
#endif /* defined(_KERNEL) */
#endif /* _M88K_ATOMIC_H_ */
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