> > I did this exact thing while porting heads to a new motherboard, as the > 4mb SPI was too small. Heres the steps, and they work.
Ok now I'm a bit confused. Can you elaborate on what some of your steps do? - When you set chip size to 16MB but use the stock descriptor, you've basically got a coreboot build with an empty / unused top half? So then step 3 tells the IFD to actually use the rest, so to speak? - I need to adjust my FMAP in addition to performing step 5? I think that's what I was missing in my initial assumptions. - In step 6, can one not modify the IFD without doing it through the actual ROM image? Thanks, R On Tue, Jan 14, 2020 at 9:26 AM Simon Newton <simon.new...@gmail.com> wrote: > re-sending to coreboot list due to a problem with my gmail subscription. > > On Tue, Jan 14, 2020 at 10:32 AM Nico Huber <nic...@gmx.de> wrote: > >> >> >> The IFD also contains a small table about flash chips (e.g. to know the >> erase opcode / block size). I'm not sure if you need to adapt it or >> if the PCH would fall back to automatic discovery via SFDP. Might also >> depend on the PCH generation. I would match it with the new chip to be >> on the safe side. >> > > This is an optional step. This table is more about letting ME know how to > write to the specific chip. see > https://github.com/corna/me_cleaner/issues/80 > > >> IMHO, the worst thing you can do is to assume that it will work on the >> first try. Better be prepared for more external flashing >> > > It doesnt work on the first try, take it from me. I found the easiest way > to do it was to use the stock factory rom, modify that with IFDtool and > then use the newly modified IFD to build coreboot (while specifying new > CBFS size inside of coreboot menuconfig) > > I did this exact thing while porting heads to a new motherboard, as the > 4mb SPI was too small. Heres the steps, and they work. > > https://github.com/osresearch/heads/issues/547#issuecomment-485887948 > > Step2 is optional and makes no difference to coreboot functionality. As > noted above, its purely for ME. > _______________________________________________ > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org >
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