From: Sascha Hauer <s.hauer@pengutronix.de>
To: Jakob Malm <jakob.malm@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: Boot linux from cramfs on USB
Date: Mon, 2 Apr 2012 19:47:50 +0200 [thread overview]
Message-ID: <20120402174750.GD3852@pengutronix.de> (raw)
In-Reply-To: <CAFEF1dGsAF1zYw+3NDW9sq98sTTp=K9VbyOoHA1kLn2Ltx7=Eg@mail.gmail.com>
On Mon, Apr 02, 2012 at 05:33:11PM +0200, Jakob Malm wrote:
> Hi,
>
> Thanks for your prompt reply!
>
> Den 2 april 2012 16:29 skrev Sascha Hauer <s.hauer@pengutronix.de>:
> > That said, your setup seems a bit crazy. What is inside your cramfs? The
> > kernel? You should rather put your kernel into a plain partition on the
> > USB disk. Or do you only have your rootfs inside the cramfs? I rather
> > recommend ext2 or ext3 for this.
>
> The cramfs would contain the rootfs, including kernel.
>
> I want to be able to have FAT on the disk, preferably with a single
> file (possibly two), containing the kernel and rootfs, and then load
> up the rootfs into memory and start the kernel with that rootfs. I
> suppose I could create a command specific for our case, but it seems
> like a common enough scenario to me that someone else should have done
> something similar...
You can extract the kernel from your cramfs image by fixing the cramfs
support. I just saw that cramfs expects a /dev/ file, that is it expects
a devfs file. This could be changed by using regular open/read/write
functions.
It would be easier though if you live with two files, one cramfs image
and one kernel image.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
prev parent reply other threads:[~2012-04-02 17:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-02 13:58 Jakob Malm
2012-04-02 14:29 ` Sascha Hauer
2012-04-02 15:33 ` Jakob Malm
2012-04-02 17:47 ` Sascha Hauer [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120402174750.GD3852@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
--cc=jakob.malm@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox