smi speedstep patch
nate at root.org
Mon Jul 16 15:43:00 UTC 2007
John Baldwin wrote:
> On Saturday 16 June 2007 01:09:27 pm Nate Lawson wrote:
>> Nate Lawson wrote:
>>> Nate Lawson wrote:
>>>> If you have a pentium 3 that works for speedstep, please try this patch.
>>>> It fixes the PAE case. Compile-tested.
>>> Hmm, I see it's no longer getting the physical address, just virtual.
>>> So need to fix that part.
>> Attached is the updated patch. It uses the low kernel map where P=V and
>> fixes the callback. I just need someone who is using smi-speedstep
>> (440bx chipset with pentium 3) to make sure the device still attaches.
>> Patch should work on 6.x and 7.x.
> Why do you need a V == P page?
I don't. I was just trying to choose a range where I was guaranteed
there would be any mapping at all. Aren't there some physical regions
(VGA, ISA hole) that don't have a mapping? Thus, it's best to ask for
RAM at 1 MB+ unless the device has special requirements, right?
BTW, this is already committed to -current.
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