[BACK]Return to atomic.h CVS log [TXT][DIR] Up to [local] / sys / arch / hppa / include
File: [local] / sys / arch / hppa / include / atomic.h (download)

Revision 1.1, Tue Mar 4 16:05:53 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN 

Initial revision

/*	$OpenBSD: atomic.h,v 1.3 2007/04/26 20:52:48 miod Exp $	*/

/* Public Domain */

#ifndef __HPPA_ATOMIC_H__
#define __HPPA_ATOMIC_H__

#if defined(_KERNEL)

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

	__asm __volatile("mfctl	%%cr15, %0": "=r" (eiem));
	__asm __volatile("mtctl	%r0, %cr15");
	*uip |= v;
	__asm __volatile("mtctl	%0, %%cr15":: "r" (eiem));
}

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

	__asm __volatile("mfctl	%%cr15, %0": "=r" (eiem));
	__asm __volatile("mtctl	%r0, %cr15");
	*uip &= ~v;
	__asm __volatile("mtctl	%0, %%cr15":: "r" (eiem));
}

static __inline void
atomic_setbits_long(__volatile unsigned long *uip, unsigned long v)
{
	register_t eiem;

	__asm __volatile("mfctl	%%cr15, %0": "=r" (eiem));
	__asm __volatile("mtctl	%r0, %cr15");
	*uip |= v;
	__asm __volatile("mtctl	%0, %%cr15":: "r" (eiem));
}

static __inline void
atomic_clearbits_long(__volatile unsigned long *uip, unsigned long v)
{
	register_t eiem;

	__asm __volatile("mfctl	%%cr15, %0": "=r" (eiem));
	__asm __volatile("mtctl	%r0, %cr15");
	*uip &= ~v;
	__asm __volatile("mtctl	%0, %%cr15":: "r" (eiem));
}

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