[coreboot] Coreboot patches for v2 with SeaBIOS

Stefan Reinauer stepan at coresystems.de
Sat Feb 28 00:38:47 CET 2009

Myles Watson wrote:
> On Fri, Feb 27, 2009 at 4:15 PM, Stefan Reinauer <stepan at coresystems.de> wrote:
>> Myles Watson wrote:
>>> Does this work for you with 4G of RAM?
>> My boards don't support that much.. :-(
> No problem.
>> Have to try on the AMD boards
>> some time. But I guess if the chipset supports more than 4G you'd have
>> to put the high_table_base to the top of low memory (default would be
>> below 3G I guess) There's no structural problem that would disallow
>> using the mechanism with any amount of RAM.
> It works fine for me with boosted memory.  It just doesn't work when
> the RAM stays low.  Maybe I'm hitting some corner case for a 32-bit OS
> that doesn't want to boost the RAM outside the addressable space.
What's boosted memory?

You must, under any circumstance, keep the high_table_area in the lower
4G and you must make sure no PCI devices (or other onboard stuff) are
where you'd expect memory.

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