[flashrom] Intel C602 support

Ross Amans ross.amans at sanmina.com
Wed Mar 13 20:09:45 CET 2013

Stefan -
Updating the ME and Descriptor region is occasionally needed. Typically
once per product. I say this from experience, as I own this on a Sandy
Bridge / Ivy bridge product.

On Wed, Mar 13, 2013 at 1:03 PM, Stefan Tauner <
stefan.tauner at student.tuwien.ac.at> wrote:

> On Wed, 13 Mar 2013 13:15:32 +0000
> Greg Schardt <gschardt at ddn.com> wrote:
> > I have modified the flashrom code to allow reads and writes to
> unprotected regions to occur, but am still blocked by having the ME region
> locked. Do you have any idea how the AFUDOS utility is able to modify the
> Management Engine region even though it should be locked? I would have
> thought that the Region Access Control settings would be in effect once the
> BIOS finished booting, before DOS could start. According to documentation,
> asserting HDA_SDO is the only way to override these settings, do you think
> that is the mechanism being used?
> AFAIK updating the ME directly is not possible if the locks are
> enabled (HDA_SDO is one way to disable them but that does not work
> after boot either). The ME probably is able to update itself and there
> is probably an interface for the host to transfer an image to it, but
> that's speculation. Are you sure afudos changes the ME region at all?
> AFAIK updating the ME (region) is not always needed. The problem is we
> do not know if this is true in all cases...
> --
> Kind regards/Mit freundlichen Grüßen, Stefan Tauner
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Ross Amans
Systems Engineer
Newisys div of Sanmina
5385 Mark Dabling blvd
Colorado Springs, CO 80918
719-884-8714 (work)
719-287-4446 (cell)

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