CPU Frequency setting

[Peter Joanes]

I would like to ask whether it might be possible to modify the
S2882 Coreboot config so that it includes a way to set the processor
frequency.
I have recently attempted to upgrade my S2882 based
system, but encountered stability problems which (after much
experimenting) seem simply to be a case of the board not being able to
handle the 2.8Ghz Opteron 254's I have put in it (which are shown as
supported on http://www.tyan.com/support_download_cpu2.aspx?socketid=9
).
If the machine completes booting, I can set the frequency to
2.6Ghz, and then all is fine, so I would like to exclude the 2.8Ghz
frequency earlier in the process (perhaps using Coreboot or maybe a slightly-modified bootloader).

Thanks,
-        Peter.
    	 	   		  
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[Myles Watson]

On Wed, Nov 4, 2009 at 11:32 AM, Peter Joanes  wrote:
> I would like to ask whether it might be possible to modify the S2882
> Coreboot config so that it includes a way to set the processor frequency.

It's definitely possible.  The quickest way would probably to insert the
code in src/mainboard/tyan/s2882/cache_as_ram_auto.c before the ht_reset.

Thanks,
Myles