[coreboot] dell s1850: 00e8 is important!

Stefan Reinauer stepan at coresystems.de
Wed Oct 7 01:22:34 CEST 2009

ron minnich wrote:
> interesting.
> e8 matters.
> here is the first round, where it comes up and patches from MCH
> registers and restarts.
> reset:SerialICE-hlp: outl 00e8 <= 44656c6c
> reset:SerialICE-hlp: outl 00e8 <= 50726f74
> here is post rest
> postreset:SerialICE-hlp: outl 00e8 <= 44656c6c
> postreset:SerialICE-hlp: outl 00e8 <= 50726f74
> postreset:SerialICE-hlp: outl 00e8 <= 496e6974 <=== this one kills serialice
> If I disable writes to 00e8, then Things Don't Work Right. At some
> point the factory bios just goes into a jump . style loop.
Can you post a full log of that case (possibly with the filter I sent in
my last mail.. It may be enough to only prevent Init from being sent,
while Dell and Prot may be crucial)

It would be interesting what the code does before going into that loop.
Maybe an input filter is needed, faking a BMC response.


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