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From: "Ulrich Ölmann" <u.oelmann@pengutronix.de>
To: rauc@pengutronix.de
Subject: Re: [RAUC] U-Boot Offset for RAW Image on Slot Update
Date: Tue, 16 Apr 2019 16:10:30 +0200	[thread overview]
Message-ID: <6r7ebuca7d.fsf@pengutronix.de> (raw)
In-Reply-To: <6ra7gqcb2z.fsf@pengutronix.de>

On Tue, Apr 16 2019 at 15:51 +0200, Ulrich Ölmann <u.oelmann@pengutronix.de> wrote:
> Hi Steffen,
>
> On Tue, Apr 16 2019 at 14:53 +0200, Steffen Kothe <steffen.kothe.gc1993@googlemail.com> wrote:
>> I try to update the U-Boot Loader on two different partitions.
>>
>> /dev/mmcblk3boot0
>> /dev/mmcblk3boot1
>>
>> A restriction on our i.Mx6 platform is location of the u-boot entry on
>> the partition.
>>
>> Offset: 1024 Byte Address: 0x400
>>
>> So a raw copy would start at address 0x00, but we have to start 0x400
>> for the entry point.
>>
>> Does rauc provides any options to customize the startaddress for a raw
>> copy/install of a binary file (u-boot binary)?
>>
>> I have took a look into the source code, but found out, that there is
>> no option to customize the default offset address for a write on a
>> partition.
>>
>>
>> Could you provide some help in this case?
>
> take a look at hooks, especially the subsubsection "Install Hook":
> https://rauc.readthedocs.io/en/latest/using.html#slot-hooks .

... and use your own logic for updating the bootloader (forgot to
mention that): write a script that switches the eMMC's bootloader
partition from read-only to read-write and use the mmc-utils (see [1] &
[2]) to atomically switch the eMMC's partition once it was written.

Best regards
Ulrich


[1] git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git
[2] https://github.com/torvalds/linux/blob/master/Documentation/mmc/mmc-tools.txt
-- 
Pengutronix e.K.                           | Ulrich Ölmann               |
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 |

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RAUC mailing list

  reply	other threads:[~2019-04-16 14:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-16 12:53 Steffen Kothe
2019-04-16 13:51 ` Ulrich Ölmann
2019-04-16 14:10   ` Ulrich Ölmann [this message]
2019-04-16 19:22     ` Enrico Jörns
2019-04-23  7:38       ` Steffen Kothe
2019-04-23  7:53         ` Jan Lübbe

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