[coreboot] Changing DRAM Frequency

[Marc Jones]

Hi Tapasya,

On Tue, Aug 16, 2011 at 5:47 PM, Tapasya Patki <tpatki at email.arizona.edu> wrote:
> Hi,
>
> I'm working on a research project for dynamic voltage/frequency scaling for
> DRAM.
>
> I am aware that coreboot initializes DRAM and sets its frequency
> (cache-as-ram) during boot. I would like to know if it is possible to change
> the DRAM frequency by following the same initialization sequence without
> rebooting the system (along with preserving the application's memory
> context).
>
> Thanks,
> Tapasya Patki

I think it depends on the memory controller and how much system
control you have at the point you wish to make the change.

Marc


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