[coreboot] Multiboot support

Stefan Reinauer stepan at coresystems.de
Tue Sep 9 21:40:31 CEST 2008

Robert Millan wrote:
> On Tue, Sep 09, 2008 at 11:19:27AM -0600, Jordan Crouse wrote:
>> On 09/09/08 18:59 +0200, Robert Millan wrote:
>>> Hi,
>>> I'm thinking that it'd be interesting for coreboot to have direct support for
>>> Multiboot, so that Multiboot kernels can be used directly without GRUB/FILO as
>>> middle man (somewhat like this thing you call "LAB").
>>> When I brought this up on IRC, Patrick expressed concerns about size.  I suppose
>>> the best would be to give users the option to provide either coreboot tables or
>>> Multiboot, whatever is needed for their payload, instead of adding both things
>>> unconditionally.
>>> Nevertheless I don't expect the basic Multiboot support to be excessively big.
>>> If this idea sounds fine, I could provide a patch for v3.
>> I support this idea unconditionally.  I know the limitations and
>> concerns about multiboot - but playing well with others is something
>> we need to do a better job of.  
> Good :-).  I'll get to work.
>> I don't suppose we could talk you into a v2 patch as well?
> Maybe ;-).  I do the v3 patch, and once we're done with it, I'll see how
> easy/hard it is to backport it, is that ok?
In v3, we basically even dropped the ELF parser from coreboot itself and
have the lar utility parse the ELF instead.

I believe it would be the best thing to extend lar in the same way so it
can preparse multiboot. that way code size in coreboot is not an issue.

v2 is a different story.

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