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Assume that TSC is stable on P-II and P-III Xeons, since systems with those

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CPUs are likely to have a TSC-friendly configuration.
This commit is contained in:
ad 2008-05-10 16:44:00 +00:00
parent c328252caf
commit 47f99407d1
1 changed files with 7 additions and 6 deletions
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13
sys/arch/x86/x86/tsc.c
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@ -1,4 +1,4 @@
/* $NetBSD: tsc.c,v 1.17 2008/05/10 16:37:08 ad Exp $ */
/* $NetBSD: tsc.c,v 1.18 2008/05/10 16:44:00 ad Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tsc.c,v 1.17 2008/05/10 16:37:08 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: tsc.c,v 1.18 2008/05/10 16:44:00 ad Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -85,9 +85,9 @@ tsc_tc_init(void)
* Core Solo and Core Duo processors (family 06, model 0e)
* Xeon 5100 series and Core 2 Duo (family 06, model 0f)
*
* We'll also assume that it's safe on the Pentium. It
* can probably be assumed for the earlier P-II and P-III
* Xeons, but for now, punt.
* We'll also assume that it's safe on the Pentium, and
* that it's safe on P-II and P-III Xeons due to the
* typical configuration of those systems.
*/
switch (CPUID2FAMILY(ci->ci_signature)) {
case 0x05:
@ -95,7 +95,8 @@ tsc_tc_init(void)
break;
case 0x06:
safe = CPUID2MODEL(ci->ci_signature) == 0x0e ||
CPUID2MODEL(ci->ci_signature) == 0x0f;
CPUID2MODEL(ci->ci_signature) == 0x0f ||
CPUID2MODEL(ci->ci_signature) == 0x0a;
break;
case 0x0f:
safe = CPUID2MODEL(ci->ci_signature) >= 0x03;