/*	$NetBSD: psl.h,v 1.5 1996/02/17 14:50:42 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 splclock()      spl1()	/* disallow clock interrupt */
#define spltty()        spl1()	/* disallow tty (softserial&adb) interrupts */
#define splbio()        spl2()	/* disallow block I/O */
#define splnet()        spl2()	/* disallow network */
#define splimp()        spl2()	/* disallow imput */
#define splhigh()       spl7()	/* disallow everything */
#define splsched()      spl7()	/* disallow scheduling */

#define splstatclock()  spl2()	/* This should be splclock... */

/* watch out for side effects */
#define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())

#endif /* _KERNEL && !_LOCORE */

#endif /* ndef PSL_C */