RE: Fwd: hpet patches

From: Pallipadi, Venkatesh
Date: Wed Jun 15 2005 - 12:18:33 EST




>-----Original Message-----
>From: Jon Smirl [mailto:jonsmirl@xxxxxxxxx]
>Sent: Tuesday, June 14, 2005 4:37 PM
>To: Pallipadi, Venkatesh
>Cc: Bob Picco; Andrew Morton; lkml
>Subject: Re: Fwd: hpet patches
>
>On 6/14/05, Pallipadi, Venkatesh <venkatesh.pallipadi@xxxxxxxxx> wrote:
>> HPET device itself can be there. But, it can appear in different
>> addresses. Most commonly used address is 0xfed00000. But, it can be
>> different as well.
>
>Does Intel build different versions of something like an 82801EB with
>the HPET at different addresses and still have the same part number?
>For a specific part number/PCI ID isn't HPET always in the same place?
>If the HPET is going to be in a different place I would expected the
>chip would have a different PCI ID.
>

The specification for ICH5 has the details about this address
http://www.intel.com/design/chipsets/datashts/25251601.pdf (Chapter 17).
We need to look at specific device address to figure out the HPET base
address in this case.


Thanks,
Venki
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