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Revision 1.1, Tue Mar 4 16:05:17 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN 

Initial revision

/*	$OpenBSD: atomic.h,v 1.5 2007/03/17 23:42:06 drahn Exp $	*/

/* Public Domain */

#ifndef __ARM_ATOMIC_H__
#define __ARM_ATOMIC_H__

#if defined(_KERNEL)

/*
 * on pre-v6 arm processors, it is necessary to disable interrupts if
 * in the kernel and atomic updates are necessary without full mutexes
 */

static __inline void
atomic_setbits_int(__volatile unsigned int *uip, unsigned int v)
{
	int oldirqstate;
	oldirqstate = disable_interrupts(I32_bit|F32_bit);
	*uip |= v;
	restore_interrupts(oldirqstate);
}

static __inline void
atomic_clearbits_int(__volatile unsigned int *uip, unsigned int v)
{
	int oldirqstate;
	oldirqstate = disable_interrupts(I32_bit|F32_bit);
	*uip &= ~v;
	restore_interrupts(oldirqstate);
}

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