using grub with coreboot

[Mikhail Savchenko]

I successfully run grub 1.96 from coreboot repository with coreboot on my
tyan s2850 board and gets grub console.

Can anybody give me assist  for getting my linux to boot with it. If I right
understand I need to place my menu.lst to memdisk, or choose it with
configfile from my hdd, but I not fully understand how can I do that, also I
haven't find the kernel command module so I don't understand how can I set
up which kernel to boot.

Thank you!

[Patrick Georgi]

Am Donnerstag, den 17.04.2008, 21:28 +0400 schrieb Mikhail Savchenko:
> I successfully run grub 1.96 from coreboot repository with coreboot on
> my tyan s2850 board and gets grub console.

Great!
> Can anybody give me assist  for getting my linux to boot with it. If I
> right understand I need to place my menu.lst to memdisk, or choose it
> with configfile from my hdd, but I not fully understand how can I do
> that, also I haven’t find the kernel command module so I don’t
> understand how can I set up which kernel to boot.

you need the modules "linux" and "boot", the command is "linux", not
"kernel" (they did that to disambiguate, I think). initrd is still
initrd.

the configfile was renamed to grub.cfg, and also changed a bit in
format, I think. See the usual GRUB2 documentation on that (I'm not too
sure about the format, either)

To get the files into the firmware image, I usually do the following, which
requires the lar tool from coreboot v3: (you can build only lar by running
"make lar" in the root directory of coreboot v3)

$CBV3DIR/build/util/lar/lar -s 30k -c test.lar grub.cfg

you can add more files to the lar file, as you need them, and you have
to adjust the size (argument to -s) accordingly.

then, create a grub module from the lar file:

./bin/grub-mkdiskimage test.lar lib/grub/i386-linuxbios/diskimage.mod

add diskimage and lar (so you get support for the file format as "filesystem")
 to your grub-mkimage arguments.

If there are any issues, feel free to ask!

Hope this helps,
Patrick

[ron minnich]

On Thu, Apr 17, 2008 at 10:48 AM, Patrick Georgi  wrote:
> Am Donnerstag, den 17.04.2008, 21:28 +0400 schrieb Mikhail Savchenko:
> > I successfully run grub 1.96 from coreboot repository with coreboot on
> > my tyan s2850 board and gets grub console.
>
> Great!
> > Can anybody give me assist  for getting my linux to boot with it. If I
> > right understand I need to place my menu.lst to memdisk, or choose it
> > with configfile from my hdd, but I not fully understand how can I do
> > that, also I haven't find the kernel command module so I don't
> > understand how can I set up which kernel to boot.
>
> you need the modules "linux" and "boot", the command is "linux", not
>  "kernel" (they did that to disambiguate, I think). initrd is still
>  initrd.
>
> the configfile was renamed to grub.cfg, and also changed a bit in
>  format, I think. See the usual GRUB2 documentation on that (I'm not too
>  sure about the format, either)
>
> To get the files into the firmware image, I usually do the following, which
>  requires the lar tool from coreboot v3: (you can build only lar by running
>  "make lar" in the root directory of coreboot v3)
>
> $CBV3DIR/build/util/lar/lar -s 30k -c test.lar grub.cfg
>
> you can add more files to the lar file, as you need them, and you have
>  to adjust the size (argument to -s) accordingly.
>
> then, create a grub module from the lar file:
>
> ./bin/grub-mkdiskimage test.lar lib/grub/i386-linuxbios/diskimage.mod
>
> add diskimage and lar (so you get support for the file format as "filesystem")
>   to your grub-mkimage arguments.
>
> If there are any issues, feel free to ask!

Is this on the wiki somewhere? It probably ought to be.

ron