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add some explanatory comments from 386bsd patchkit patch 113

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This commit is contained in:
cgd 1993-05-07 05:22:14 +00:00
parent 318000897b
commit b1c02394c3
2 changed files with 9 additions and 2 deletions
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9
sys/arch/i386/i386/machdep.c
View File

@ -44,7 +44,7 @@
* 15 Aug 92 William Jolitz Large memory bug
* 15 Aug 92 Terry Lambert Fixed CMOS RAM size bug
*/
static char rcsid[] = "$Header: /cvsroot/src/sys/arch/i386/i386/machdep.c,v 1.6 1993/04/10 13:47:49 cgd Exp $";
static char rcsid[] = "$Header: /cvsroot/src/sys/arch/i386/i386/machdep.c,v 1.7 1993/05/07 05:22:14 cgd Exp $";
#include "param.h"
#include "systm.h"
@ -558,6 +558,11 @@ dumpsys()
}
#ifdef HZ
/*
* If HZ is defined we use this code, otherwise the code in
* /sys/i386/i386/microtime.s is used. The othercode only works
* for HZ=100.
*/
microtime(tvp)
register struct timeval *tvp;
{
@ -571,7 +576,7 @@ microtime(tvp)
}
splx(s);
}
#endif
#endif /* HZ */
physstrat(bp, strat, prio)
struct buf *bp;

2
sys/arch/i386/isa/clock.c
View File

@ -76,6 +76,8 @@ startrtclock() {
to find the cpu speed */
/* initialize 8253 clock */
outb(TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT);
/* Correct rounding will buy us a better precision in timekeeping */
outb (IO_TIMER1, (XTALSPEED+hz/2)/hz);
outb (IO_TIMER1, ((XTALSPEED+hz/2)/hz)/256);