On 14.07.2009 18:55, Michael Gold wrote: > On Tue, Jul 14, 2009 at 08:38:15 -0700, ron minnich wrote: > >> I like it. We talked about something like this in v3. How would you >> feel about putting in emergency flash upgrade support :-) >> > > I like the flash upgrade idea, but I'm not sure how to do it yet (in a > generic way). Any suggestions? >
If you have RAM, downloading a flashrom binary linked against libpayload would be best. The good news is that flashrom itself is written in a way that allows you to put it on top of any backend, even a backend which does nothing but perform remote control of xcshell. I think that would be easiest. > I think it might be possible without any changes by marking the part of > the ROM containing xcshell as cacheable, and then using pokes to rewrite > the rest of the chip. It would be slow, but a small flash upgrade > program could be uploaded that would do the rest of the work more > quickly. > If you have a generic "write X to loation y" interface, flashrom can deal with that, even remotely. > My original idea was that one would set up CAR, upload code, and jump to > it; this would allow the system to be extended without having to include > much code. It doesn't work, at least on my Pentium 3, but the same > thing could be done with RAM once it's initialised (or with flash for > occasional use). > As long as RAM works, we could even upload a complete flashrom binary over zmodem. Regards, Carl-Daniel -- http://www.hailfinger.org/ -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
