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From: Giorgio Dal Molin <giorgio.nicole@arcor.de>
To: barebox@lists.infradead.org
Subject: root= kernel cmdline parameter
Date: Tue, 31 Jul 2018 13:20:12 +0200 (CEST)	[thread overview]
Message-ID: <479189478.116665.1533036012752@mail.vodafone.de> (raw)

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 ?

Using the global var. 'bootm.appendroot' does not work because the
userland image is not in the same partition as the kernel.

giorgio

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             reply	other threads:[~2018-07-31 11:20 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-31 11:20 Giorgio Dal Molin [this message]
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
2018-08-09  7:45   ` Giorgio Dal Molin
2018-08-31 13:43     ` Giorgio Dal Molin

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