[coreboot] GeodeLX RAM initialisation issue

Daniel Mack daniel at caiaq.de
Fri Dec 4 17:47:55 CET 2009

No hint, anyone?

On Wed, Dec 02, 2009 at 03:44:15PM +0100, Daniel Mack wrote:
> On Wed, Dec 02, 2009 at 02:59:01PM +0100, Peter Stuge wrote:
> > Daniel Mack wrote:
> > > the effect is harder to trigger when booting from an external LPC
> > > flash emulator (in contrast to coreboot flashed to the internal
> > > LPC).
> > 
> > Then you could experiment with a few different flash chips.
> > 
> > PC Engines makes a nice and neat Flash recovery board, which plugs
> > onto the LPC header, and comes with a PLCC chip in a socket.
> I doubt the flash chip itself is the problem. Might be I haven't been
> totally clear about what I observed.
> When using the Linux tools to flash an image to the internal LPC, the
> system most likely won't come up immediately. I need that power-off
> delay of some minutes to reanimate the board. After that, the bug is
> very hard to trigger, even though it does happen, especially when
> powering the device off (by unplugging the supply) and on again right
> after that.
> So my theory is that there is something left in any part of the system
> which makes coreboot fail in disable_car(). And the same (or maybe just
> a similar) effect is triggered when the LPC is written.
> Does that ring a bell? As I said, I'm pretty lost in debugging this, but
> I'm sure we're not having a hardware issue.
> Thanks,
> Daniel

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