[coreboot] Minimal seabios for coreboot

Zhang Rui zrfail at gmail.com
Tue Aug 5 06:44:55 CEST 2008

2008/7/22, Kevin O'Connor <kevin at koconnor.net>:
> Hi,
> Several people have raised the possibility of replacing the coreboot
> BIOS emulation for option roms with SeaBIOS.
> So, I can see a mode where coreboot would lzma uncompress a minimal
> seabios into 0xf0000, call into seabios, seabios would then init
> itself and return to coreboot.  Then coreboot would finish
> initialization and launch the payload from flash.
> I can see where the above would be useful if the payload is always
> coming out of flash.  However, if the user ever needs to boot using
> seabios (or via a scsi/pxe option rom) then I think seabios needs to
> be the payload and needs to drive the bootup.

so if I want to write the int13 for scsi booting, should I write
interrupt function in coreboot and inject it to int13, or just write
codes in seabios?

> If there is interest in doing this, we'll need to figure out how to
> work out the interactions.  Zhang Rui is currently working on having
> seabios return to coreboot.  As for code integration - I'd like to
> avoid forking the seabios code.  Perhaps it would be okay to simply
> copy a seabios binary into the svn repo with directions on how to
> build it manually.  (This is what qemu and bochs do for their bios
> blobs.)
Maybe this is the simplest way.

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