From: Sascha Hauer <s.hauer@pengutronix.de>
To: Giorgio Dal Molin <giorgio.nicole@arcor.de>
Cc: barebox@lists.infradead.org
Subject: Re: root= kernel cmdline parameter
Date: Wed, 8 Aug 2018 09:52:53 +0200 [thread overview]
Message-ID: <20180808075253.pmj2hivb6xzm24kn@pengutronix.de> (raw)
In-Reply-To: <479189478.116665.1533036012752@mail.vodafone.de>
On Tue, Jul 31, 2018 at 01:20:12PM +0200, Giorgio Dal Molin wrote:
> Hi all,
>
> I'm trying to find out the best method to define the root=
> parameter when booting the linux kernel from barebox.
>
> My system boots from an sd card partitioned with a GPT.
> The sd card has two independent set of partitions with
> the following labels:
>
> 1) boot_1 + rootfs_1
> 2) boot_2 + rootfs_2
>
> for redondance in case one set gets damaged while updating.
>
> 'boot_1' is formatted with ext4 and contains the kernel + dtb images
> for the userland in 'rootfs_1'; and the same for 'boot_2' and 'rootfs_2'.
>
> Currently I hardcode the 'root' parameter to '/dev/mmcblk0p3' or
> '/dev/mmcblk0p4' corresponding to the kernel in 'boot_1' or
> 'boot_2' and it actually works but is there a better way to do
> this ?
You could use bootloader spec. That would at least allow you to store a
suitable root= parameter in the config files in the boot_1 and boot_2
partitions.
Not sure if that's what you are looking for though.
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
next prev parent reply other threads:[~2018-08-08 7:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 11:20 Giorgio Dal Molin
2018-08-06 18:15 ` Uwe Kleine-König
2018-08-06 19:30 ` Giorgio Dal Molin
2018-08-06 19:44 ` Uwe Kleine-König
2018-08-08 7:52 ` Sascha Hauer [this message]
2018-08-09 7:45 ` Giorgio Dal Molin
2018-08-31 13:43 ` Giorgio Dal Molin
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=20180808075253.pmj2hivb6xzm24kn@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
--cc=giorgio.nicole@arcor.de \
/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