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Poll console at 50 Hz, not 1024 Hz! (4 tlb and imb coherency ops per poll 

make this exceedingly expensive even on an alpha)  Note: only 3 systypes
still use promcons.
This commit is contained in:
ross 1998-03-01 07:40:11 +00:00
parent 331fee623e
commit 39254d4d4b
1 changed files with 12 additions and 5 deletions
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17
sys/arch/alpha/alpha/promcons.c
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@ -1,4 +1,4 @@
/* $NetBSD: promcons.c,v 1.10 1998/02/13 02:09:10 cgd Exp $ */
/* $NetBSD: promcons.c,v 1.11 1998/03/01 07:40:11 ross Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -29,7 +29,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: promcons.c,v 1.10 1998/02/13 02:09:10 cgd Exp $");
__KERNEL_RCSID(0, "$NetBSD: promcons.c,v 1.11 1998/03/01 07:40:11 ross Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -51,7 +51,10 @@ __KERNEL_RCSID(0, "$NetBSD: promcons.c,v 1.10 1998/02/13 02:09:10 cgd Exp $");
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
#define PROM_POLL_HZ 50
static struct tty *prom_tty[1];
static int polltime;
cdev_decl(prom);
@ -103,8 +106,12 @@ promopen(dev, flag, mode, p)
splx(s);
error = (*linesw[tp->t_line].l_open)(dev, tp);
if (error == 0 && setuptimeout)
timeout(promtimeout, tp, 1);
if (error == 0 && setuptimeout) {
polltime = hz / PROM_POLL_HZ;
if (polltime < 1)
polltime = 1;
timeout(promtimeout, tp, polltime);
}
return error;
}
@ -227,7 +234,7 @@ promtimeout(v)
if (tp->t_state & TS_ISOPEN)
(*linesw[tp->t_line].l_rint)(c, tp);
}
timeout(promtimeout, tp, 1);
timeout(promtimeout, tp, polltime);
}
struct tty *