boot up requirement

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Date: Wed, 22 Dec 2004 21:12:36 +0530

Hi,
My requirement:
    I have a board with a daughter board on it.
    Motherboard(MB) has a IDE hard disk. Daughterboard(DB) has IUSB flash
disk.
    The communication between the 2 boards is via PCI bus.
    Daughterboard is like a slave to the Motherboard.MB has the OS as psos.
    Daughter board have Linux on it.(no other OS)

    The issue is how to bring up the daughter board.

My analysis:
    Since the DB has the flash disk(Assume it is formatted), it has to boot
using some standard bootloader such as LILO/GRUB. I mean to say that we
cannot follow the procedure meant as the part of bootsect.s file as this is
meant for booting from floppy.Also this file is obsolete from 2.6 kernel
onwards!.

Initially, BIOS will get the linux image from the MB hard disk through PCI
interface.
Now, the BIOS shall jump to the MBR of the flash disk (BIOS have the drivers
to access the flash disk) and execute stage1 of the bootloader(assume if i
use GRUB), then, for it to load and run the linux image, it searches the
/boot directory for the linux image. This means that the stage1 of the
bootloader should be aware of the file sytem. Who creates the file system??
Also, for the BIOS to put the image on the flash disk, it should know the
file system format!!!. Isnt it?
Does this mean the BIOS should create the file system??

Assume if my requirement is that i should NOT create the file system
manually before i put the flash disk in to the DB. It should be taken care
through some other means.
(or) the only way out without too many hurdles is to create file system
manually on the flash disk.

Thanks
Uday

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