diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2008-07-07 13:42:00 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2008-07-07 13:42:00 +0000 |
| commit | 93e92a9c74328c516909db2f94df63f36569f670 (patch) | |
| tree | 58004709779024f45c91be4e3e74ef269f25ed4d /sys/arch | |
| parent | 35080770669bb33902874355e9388bdd2d839850 (diff) | |
Add an entry to report the bus clock on bernd's atom laptop.
Intel don't publish the EST voltage tables, and they don't
even publish the MSRs for a shipping processor so we
can figure out how to do this in the backwards highest/lowest
way cleanly.
The mapping might look like the Core * one, but who really knows
for sure outside of a few guys at Intel. Other machines with
Atom processors and a different bus clock will have to be added
one by one until this stupidity changes.
Tested by bernd, ok gwk
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/i386/i386/machdep.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c index 25a34b88312..95bd7c28629 100644 --- a/sys/arch/i386/i386/machdep.c +++ b/sys/arch/i386/i386/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.433 2008/06/27 17:22:14 miod Exp $ */ +/* $OpenBSD: machdep.c,v 1.434 2008/07/07 13:41:59 jsg Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -2021,6 +2021,19 @@ p3_get_bus_clock(struct cpu_info *ci) goto print_msr; } break; + case 0xc: /* Atom */ + msr = rdmsr(MSR_FSB_FREQ); + bus = (msr >> 0) & 0x7; + switch (bus) { + case 1: + bus_clock = BUS133; + break; + default: + printf("%s: unknown Atom FSB_FREQ value %d", + ci->ci_dev.dv_xname, bus); + goto print_msr; + } + break; case 0x1: /* Pentium Pro, model 1 */ case 0x3: /* Pentium II, model 3 */ case 0x5: /* Pentium II, II Xeon, Celeron, model 5 */ |