[coreboot] Geode RAM check failing during initram

[Carl-Daniel Hailfinger]

Hi Mart,

you wrote that RAM check fails during initram for the Geode LX. AFAICS
that is expected due to MSR_GLIU0_SYSMEM not being set at that stage, so
any accesses to stuff above 1M will end up nowhere.
northbridge_init_early() provided a clue about this behaviour. I hope
this observation will help you work around the RAM check breakage.

Regards,
Carl-Daniel