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* Remove unused function spinwait. 

* Add Phil Budne's microtime.
This commit is contained in:
matthias 1996-10-09 07:44:54 +00:00
parent 00695d93ae
commit afd88ad8ed
1 changed files with 35 additions and 13 deletions
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48
sys/arch/pc532/pc532/clock.c
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@ -1,4 +1,4 @@
/* $NetBSD: clock.c,v 1.12 1996/01/31 21:33:47 phil Exp $ */
/* $NetBSD: clock.c,v 1.13 1996/10/09 07:44:54 matthias Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@ -44,6 +44,7 @@
*
* Improved by Phil Budne ... 10/17/94.
* Pulled over code from i386/isa/clock.c (Matthias Pfaller 12/03/94).
* Phil Budne's better microtime added 09/02/96
*/
#include <sys/param.h>
@ -53,16 +54,16 @@
#include <machine/icu.h>
void spinwait __P((int));
static int divisor;
void
startrtclock()
{
int timer = (ICU_CLK_HZ) / hz;
divisor = ICU_CLK_HZ / hz;
/* Write the timer values to the ICU. */
WR_ADR (unsigned short, ICU_ADR + HCSV, timer);
WR_ADR (unsigned short, ICU_ADR + HCCV, timer);
ICUW(HCSV) = divisor;
ICUW(HCCV) = divisor;
/* Establish interrupt vector */
intr_establish(IR_CLK, hardclock, NULL, "clock", IPL_CLOCK,
@ -72,14 +73,8 @@ startrtclock()
void
cpu_initclocks()
{
/* enable clock interrupt */
WR_ADR (unsigned char, ICU_ADR +CICTL, 0x30);
}
void
spinwait(int millisecs)
{
DELAY(5000 * millisecs);
/* Enable clock interrupt. */
ICUB(CICTL) = 0x30;
}
void
@ -88,6 +83,33 @@ setstatclockrate(int dummy)
printf ("setstatclockrate\n");
}
void
microtime(tvp)
register struct timeval *tvp;
{
u_short count, delta, ipend;
di();
ICUB(MCTL) |= 0x88; /* freeze HCCV, IPND */
count = ICUW(HCCV);
ipend = ICUW(IPND);
*tvp = time;
ICUB(MCTL) &= 0x77; /* thaw ICU regs */
ei();
/* yields value 0..9999 */
delta = ((divisor - count) * (4096 * 1000000UL / ICU_CLK_HZ)) >> 12;
tvp->tv_usec += delta;
/* check for timer overflow (ie; clock int disabled) */
if (count > 0 && (ipend & (1<<IR_CLK))) {
tvp->tv_usec += tick;
if (tvp->tv_usec > 1000000) {
tvp->tv_usec -= 1000000;
tvp->tv_sec++;
}
}
}
static int month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};