On Sat, Oct 28, 2006 at 02:22:11PM -0400, Lee Revell wrote:
> On Fri, 2006-10-27 at 20:59 -0700, Andi Kleen wrote:
> > > Fortunately, we usually have an HPET, these days. You can
> > definitely
> > > resync and get near-linear values of RDTSC.
> >
> > No we don't -- most BIOS still don't give us the HPET table
> > even when it is there in hardware. In the future this will change sure
> > but people will still run a lot of older motherboards.
>
> I have exactly such a system (see thread "x86-64 with nvidia MCP51
> chipset: kernel does not find HPET"). Is there anything at all I can do
> to make the kernel see the HPET? Can I try to guess the address? BIOS
> upgrade?
In most cases where the HPET is present but not reported, it's not
configured. Usually, you need to write a chipset-specific register to
configure the address.
Finding the register, finding some free MMIO space, writing the address
to the register and telling the address to the kernel is enough.
--
Vojtech Pavlik
Director SuSE Labs
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
