59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* $NetBSD: psl.h,v 1.12 1996/09/12 20:39:19 scottr Exp $ */
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#ifndef PSL_C
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#include <m68k/psl.h>
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#if defined(_KERNEL) && !defined(_LOCORE)
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/*
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* spl functions; all but spl0 are done in-line
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*/
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#define _spl(s) \
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({ \
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register int _spl_r; \
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\
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__asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
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"&=d" (_spl_r) : "di" (s)); \
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_spl_r; \
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})
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/* spl0 requires checking for software interrupts */
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#define spl1() _spl(PSL_S|PSL_IPL1)
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#define spl2() _spl(PSL_S|PSL_IPL2)
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#define spl3() _spl(PSL_S|PSL_IPL3)
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#define spl4() _spl(PSL_S|PSL_IPL4)
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#define spl5() _spl(PSL_S|PSL_IPL5)
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#define spl6() _spl(PSL_S|PSL_IPL6)
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#define spl7() _spl(PSL_S|PSL_IPL7)
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/*
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* These should be used for:
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* 1) ensuring mutual exclusion (why use processor level?)
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* 2) allowing faster devices to take priority
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*
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* Note that on the Mac, most things are masked at spl1, almost
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* everything at spl2, and everything but the panic switch and
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* power at spl4.
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*/
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#define splsoftclock() spl1() /* disallow softclock */
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#define splsoftnet() spl1() /* disallow network */
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#define spltty() spl1() /* disallow tty (softserial & ADB) */
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#define splbio() spl2() /* disallow block I/O */
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#define splnet() spl2() /* disallow network */
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#define splimp() spl2() /* mutual exclusion for memory allocation */
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#define splclock() spl2() /* disallow clock (and other) interrupts */
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#define splstatclock() spl2() /* ditto */
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#define splzs() spl4() /* disallow serial hw interrupts */
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#define spladb() spl7() /* disallow adb interrupts */
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#define splhigh() spl7() /* disallow everything */
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#define splsched() spl7() /* disallow scheduling */
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/* watch out for side effects */
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#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
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int spl0 __P((void));
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#endif /* _KERNEL && !_LOCORE */
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#endif /* ndef PSL_C */
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