[coreboot] suspend/resume in v3

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Mon Sep 8 02:33:01 CEST 2008

On 08.09.2008 02:20, Kevin O'Connor wrote:
> On Mon, Sep 08, 2008 at 01:50:07AM +0200, Carl-Daniel Hailfinger wrote:
>> On 08.09.2008 01:27, Kevin O'Connor wrote:
>>> I don't think one can mark 48KB reserved below 0xA0000.  I've found
>>> that boot loaders are picky about any reserved memory below 1MB.
>> Would 0xC0000-0xCFFFF for be OK? We already use that on some targets.
> Using the space at 0xc8000 - 0xf0000 would work, but it would limit
> the maximum number of option roms.

That applies to any location between 0xA0000 and 0xFFFFF, though. And a
location below 0xA0000 would cause collisions with operating systems and
bootloaders requiring lowmem if we didn't discard the stack after
finishing execution of coreboot.

> (You can't use 0xc0000 for long
> term storage, because the vga option rom must reside there.)

Fortunately, the stack is designed to be discarded the moment we run a
payload, so there are no survival requirements at all.



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