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/* $OpenBSD: psl.h,v 1.4 1996/05/26 18:36:00 briggs Exp $ */
/* $NetBSD: psl.h,v 1.9 1996/05/19 04:30:32 briggs Exp $ */
#ifndef PSL_C
#include <m68k/psl.h>
#if defined(_KERNEL) && !defined(_LOCORE)
/*
* spl functions; all but spl0 are done in-line
*/
#define _spl(s) \
({ \
register int _spl_r; \
\
__asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
"&=d" (_spl_r) : "di" (s)); \
_spl_r; \
})
/* spl0 requires checking for software interrupts */
#define spl1() _spl(PSL_S|PSL_IPL1)
#define spl2() _spl(PSL_S|PSL_IPL2)
#define spl3() _spl(PSL_S|PSL_IPL3)
#define spl4() _spl(PSL_S|PSL_IPL4)
#define spl5() _spl(PSL_S|PSL_IPL5)
#define spl6() _spl(PSL_S|PSL_IPL6)
#define spl7() _spl(PSL_S|PSL_IPL7)
/*
* These should be used for:
* 1) ensuring mutual exclusion (why use processor level?)
* 2) allowing faster devices to take priority
*
* Note that on the Mac, most things are masked at spl1, almost
* everything at spl2, and everything but the panic switch and
* power at spl4.
*/
#define splsoftclock() spl1() /* disallow softclock */
#define splsoftnet() spl1() /* disallow network */
#define spltty() spl1() /* disallow tty (softserial & ADB) */
#define splbio() spl2() /* disallow block I/O */
#define splnet() spl2() /* disallow network */
#define splimp() spl2() /* disallow goblins and other nonsense */
#define splclock() spl2() /* disallow clock (and other) interrupts */
#define splstatclock() spl2() /* ditto */
#define splzs() spl4() /* disallow serial hw interrupts */
#define splhigh() spl7() /* disallow everything */
#define splsched() spl7() /* disallow scheduling */
/* watch out for side effects */
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
int spl0 __P((void));
#endif /* _KERNEL && !_LOCORE */
#endif /* ndef PSL_C */
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