[U-Boot] Can I have a backup boot option ?

[U-Boot] Can I have a backup boot option ?

[Mark Jackson]

Our current system works fine (booting from flash or nfs), but I'd also like to add a "recovery" feature.

If an end-user inserts an MMC card containing some "magic marker" files, the target will detect these and boot from the MMC card instead of using the standard boot option.

For portability, I guess I could use the Hush option and construct some big if..else..fi statement to check for the MMC card files and boot accordingly. Is this a simple-ish task ?

An easier, but less portable, way would be to hard-code the checks in the startup code before the standard boot process.

I've done a quick check of the README and the source code, but nothing else seems to stand out as a possible solution.

Anyone got any ideas ?

Thanks
Mark

[U-Boot] Can I have a backup boot option ?

[Wolfgang Denk]

Dear Mark,

In message <492AA134.7010008@mimc.co.uk> you wrote:
> 
> If an end-user inserts an MMC card containing some "magic marker" files, the target will detect these and boot from the MMC card instead of using the standard boot option.
...
> I've done a quick check of the README and the source code, but nothing else seems to stand out as a possible solution.

Note: please restrict your line lenght to some 70 or so characters.

There are several  auto-update  /  recovery  solutions  available  in
current  source  code.  Just look around - search for file names that
contain auto_update or fwupdate, and/or read doc/README.update

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Sorry, but my karma just ran over your dogma.

[U-Boot] Can I have a backup boot option ?

[Mark Jackson]

Wolfgang Denk wrote:
> Dear Mark,
> 
> In message <492AA134.7010008@mimc.co.uk> you wrote:
>> If an end-user inserts an MMC card containing some "magic marker" ...
> ...
>> I've done a quick check of the README and the source code, but ...
> 
> Note: please restrict your line lenght to some 70 or so characters.

Hmmm ... I'm sure I'd already done that ... Thunderbird must have reset 
itself ??

> There are several  auto-update  /  recovery  solutions  available  in
> current  source  code.  Just look around - search for file names that
> contain auto_update or fwupdate, and/or read doc/README.update

Ah, excellent.  Thanks for the pointers.

> Best regards,
> 
> Wolfgang Denk
>