RE: CRAMFS: Error -3 while decompressing!

What's /dev/rw ???

Is a mistake, the correct argument is root=3D/dev/ram.

We would want to use a Compact Flash card with VFAT file system to boot =
our system, so we need to store a linux kernel image and an initrd image =
on it.

						/boot/initrd.img
						/boot/vmlinux.img
						/custom/ (custom applications)


The contents of this initrd is basically busybox,libraris and device =
files:

						/bin/busybox (and simbolik links to busybox)					=09
						/etc/*
						/lib/lib*.so=20
						/dev/*
						/proc
						/mnt/(here goes mounted Compact Flash card )

U-Boot can load linux kernel image and initrd from Compact Flash to RAM. =
Then, when linux boots, we can mount the Compact flash card and execute =
our custom applications.

We haven't choose already the initrd file system type, but CRAMFS is an =
option. However, as I mentioned in the previos message, a CRAMFS initrd =
doesn=B4t boot in our board.


Thanks in advance.


-----Mensaje original-----
De: wd@denx.de [mailto:wd@denx.de]
Enviado el: lunes, 22 de mayo de 2006 22:59
Para: IGOR LURI
CC: linuxppc-embedded@ozlabs.org
Asunto: Re: CRAMFS: Error -3 while decompressing!=20


In message [ref] you wrote:

=20
We have a mpc5200liteB evaluation board with u-boot 1.1.4 and linux=20
2.4.25 from Denx.  We have grabed a cramfs  root fs on a mtd partition =

and we are able to boot linux without problems:

...

However, we are not able to boot linux with the same rootfs image =

(with=20

the u-boot header) loaded from RAM.
=20
        setenv bootargs root=3D/dev/rw rw console=3DttyS0 =

console=3DttyS0

        init=3D/sbin/init ip=3Don

What's /dev/rw ???

and CRAMFS image is built with correct endianess:

Ummm.. Why would you want to use a cramfs file system in a ramdisk
image? This iseems to be a truely pessimal combination of features to
me. Please see
http://www.denx.de/wiki/view/DULG/RootFileSystemDesignAndBuilding for
some hints...

Best regards,

Wolfgang Denk

--=20
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
"Life sucks, but it's better than the alternative."
- Peter da Silva