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Fix timecounters using interval timers: amiga counters are not 32 bits,

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so the tc_counter_mask needs to be set based on the interval timer.
Process cpu usage was returning negative or very large values.
This commit is contained in:
mhitch 2008-12-07 03:48:43 +00:00
parent 2aa8aa0f8f
commit b11961451a
1 changed files with 10 additions and 3 deletions
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13
sys/arch/amiga/dev/clock.c
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@ -1,4 +1,4 @@
/* $NetBSD: clock.c,v 1.47 2008/01/06 18:50:31 mhitch Exp $ */
/* $NetBSD: clock.c,v 1.48 2008/12/07 03:48:43 mhitch Exp $ */
/*
* Copyright (c) 1982, 1990 The Regents of the University of California.
@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.47 2008/01/06 18:50:31 mhitch Exp $");
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.48 2008/12/07 03:48:43 mhitch Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
@ -112,7 +112,7 @@ static u_int clk_getcounter(struct timecounter *);
static struct timecounter clk_timecounter = {
clk_getcounter, /* get_timecount */
0, /* no poll_pps */
~0u, /* counter_mask */
0x0fffu, /* counter_mask */
0, /* frequency */
"clock", /* name, overriden later */
100, /* quality */
@ -159,6 +159,7 @@ void
clockattach(struct device *pdp, struct device *dp, void *auxp)
{
const char *clockchip;
u_int counter_mask;
unsigned short interval;
#ifdef DRACO
u_char dracorev;
@ -188,8 +189,14 @@ clockattach(struct device *pdp, struct device *dp, void *auxp)
amiga_clk_interval = (eclockfreq / hz);
counter_mask = 0x8000;
while (counter_mask != 0 && (counter_mask & amiga_clk_interval) == 0)
counter_mask >>= 1;
counter_mask -= 1;
clk_timecounter.tc_name = clockchip;
clk_timecounter.tc_frequency = eclockfreq;
clk_timecounter.tc_counter_mask = counter_mask;
fast_delay_limit = UINT_MAX / amiga_clk_interval;