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Store initial TSC/HPET readings for hpet0 only.

This commit is contained in:
ad 2020-05-16 23:06:40 +00:00
parent bc77394ce5
commit 9d5d6dbf80
1 changed files with 3 additions and 3 deletions
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6
sys/dev/ic/hpet.c
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@ -1,4 +1,4 @@
/* $NetBSD: hpet.c,v 1.16 2020/05/08 22:01:54 ad Exp $ */
/* $NetBSD: hpet.c,v 1.17 2020/05/16 23:06:40 ad Exp $ */
/*
* Copyright (c) 2006 Nicolas Joly
@ -33,7 +33,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hpet.c,v 1.16 2020/05/08 22:01:54 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: hpet.c,v 1.17 2020/05/16 23:06:40 ad Exp $");
#include <sys/systm.h>
#include <sys/device.h>
@ -149,7 +149,7 @@ hpet_attach_subr(device_t dv)
sc->sc_adj = (int64_t)val * sc->sc_period / 1000;
/* Store attach-time values for computing TSC frequency later. */
if (cpu_hascounter()) {
if (cpu_hascounter() && sc == hpet0) {
(void)cpu_counter();
val = bus_space_read_4(sc->sc_memt, sc->sc_memh, HPET_MCOUNT_LO);
hpet_attach_tsc = cpu_counter();