[coreboot] Coreboot FILO boot from USB

[Vipin Gahlaut]

Looking at blockdev.c I believe that usb disks are listed as ud so I tried
root (ud0) with no luck so far.

filo> root
(ud0)
filo> kernel /boot/vmlinuz


Error 15: File not
found
filo>

On Sat, Oct 11, 2014 at 4:39 PM, Vipin Gahlaut <gailu96 at gmail.com> wrote:

> Hi Experts,
>
> I am trying to boot Linux from USB using coreboot and FILO and not able to
> find any documentation what parameter should I set on FILO prompt. I have
> enabled USB support while building FILO and libpayload.
>
> Booting from hard disk works fine as below.
> Start qemu with -hda disk.img option and give following on FILO prompt
> <filo>root (hd0)
> <filo>kernel /boot/vmlinuz-2.6.20 root=/dev/hda console=ttyS0
> <filo>boot
>
> Now I am trying to boot from USB and start qemu with
> -usbdevice disk:disk.img
>
> I am not finding any information what parameter should I set. I tried
> using root (hd0) (hd1) (sd0) FILO is not able to find my kernel image in
> /boot/
>
> See errors below.
>
> filo> root
> (hd1)
> filo> kernel
> /boot/vmlinuz-2.6.20
> Drive 1 does not
> exist
>
>
> Error 15: File not
> found
> filo> root
> (sd0)
> filo> kernel
> /boot/vmlinuz-2.6.20                                               Unknown
> device type: sda
>
>
> Error 15: File not
> found
> filo> root
> (hd0)
> filo> kernel
> /boot/vmlinuz-2.6.20
> Drive 0 does not
> exist
>
>
> Error 15: File not
> found
> filo>
>
> Can someone please let me know what is expected device name for the usb I
> enabled in qemu?
>
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