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Revision 1.1, Tue Mar 4 16:07:47 2008 UTC (16 years, 3 months ago) by nbrk
Branch point for: MAIN 

Initial revision

/*	$OpenBSD: atomic.h,v 1.3 2007/03/17 22:10:04 kettenis Exp $	*/

/* Public Domain */

#ifndef __POWERPC_ATOMIC_H__
#define __POWERPC_ATOMIC_H__

#if defined(_KERNEL)

static __inline void
atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
{
	unsigned int tmp;

	__asm volatile (
	    "1:	lwarx	%0, 0, %2	\n"
	    "	or	%0, %1, %0	\n"
	    "	stwcx.	%0, 0, %2	\n"
	    "	bne-	1b		\n"
	    "	sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "memory");
}

static __inline void
atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
{
	unsigned int tmp;

	__asm volatile (
	    "1:	lwarx	%0, 0, %2	\n"
	    "	andc	%0, %0, %1	\n"
	    "	stwcx.	%0, 0, %2	\n"
	    "	bne-	1b		\n"
	    "	sync" : "=&r" (tmp) : "r" (v), "r" (uip) : "memory");
}

#endif /* defined(_KERNEL) */
#endif /* __POWERPC_ATOMIC_H__ */