58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* $NetBSD: psl.h,v 1.10 1996/06/14 04:42:50 scottr 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 splclock() spl2() /* disallow clock (and other) interrupts */
|
|
#define splstatclock() spl2() /* ditto */
|
|
#define splzs() spl4() /* disallow serial hw interrupts */
|
|
#define splimp() spl4() /* mutual exclusion for memory allocation */
|
|
#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 */
|