On Tue, 29 Aug 2006 11:04:05 +1000
Simon Burge <simonb@NetBSD.org> wrote:

> Juan RP wrote:
> 
> > A have a new laptop (Compaq Presario V4000) and I tried NetBSD
> > to see how it works, so far so fine but SpeedStep didn't work.
> > 
> > After adding the entries to it I made it work, but after looking at the
> > FreeBSD/OpenBSD code I think it's better to sync our code with them.
> > 
> > I synced the code with OpenBSD -current.
> > 
> > Full dmesg with new code:
> > 
> > http://www.xtrarom.org/~juan/PresarioV4000.dmesg
> > 
> > New est.c driver for review:
> > 
> > http://www.xtrarom.org/~juan/new_est.diff
> > 
> > New code does the following:
> > 
> > * Adds support for more Pentium M processors (and VIA C7 M
> >    but not on this patch).
> > * Reimplements the Enhanced SpeedStep CPU detection by using
> >    quintuplet { vendor, MHz_hi, mV_hi, MHz_lo, mV_lo }, which matches
> >    cpus more correctly that parsing the brand string.
> > * It makes easier to add new models.
> > 
> > Can you please review or comment about it?
> 
> Do you know what needs to be done to support Core Duo CPUs?  I've got
> a Dell 640m that says:
> 
> cpu0: features2 c1a9<SSE3,MONITOR,VMX,EST,TM2,xTPR>
> cpu0: "Genuine Intel(R) CPU           T2400  @ 1.83GHz"
> cpu0: Enhanced SpeedStep (1404 mV)  - unknown Enhanced SpeedStep CPU.
> cpu1: features2 c1a9<SSE3,MONITOR,VMX,EST,TM2,xTPR>
> cpu1: "Genuine Intel(R) CPU           T2400  @ 1.83GHz"
> cpu1: Enhanced SpeedStep (1404 mV)  - unknown Enhanced SpeedStep CPU.
> 
> Even though there's an "EST" in the features2, est.c says "as
> implemented in Pentium M processors".  Is that part of the issue?

Without knowing the tables will be difficult to support by this driver. AFAIK
the only way to know is to use ACPI and evaluate _PSS/_PST.

I googled about Core Duo processors but couldn't find anything useful
for the driver...