In message <20030603192851.GA1921 at mars.ravnborg.org> you wrote: > > A few of the added requirements on top of that are: > 1) The target shall boot up in the old kernel, if a bogus kernel is loaded
Define "bogus kernel"! Depending if you mean one which was corrupted during download/installation you can use a checkum; if you mean one which fails to start the application you can use a watchdog. Both is trivial and supporeted by several bootloaders. > 2) The target shall boot up in the old application, if a bogus > application is loaded Same as above. Here it comes handy if you don't have to bundle the application with the kernel into one image. > 3) On the management side an update shall be handled as a single file, > the target may decide to 'unpack' it when received. OK, not too difficult. > We have looked all over the net, but none of the bootloaders found > so far could meet the above demands. Ummm... how comes you missed to look into U-Boot? It easily performs all your reqirements. Without modifying a single line of code. > The boot loaders usually have an interactive mode used to select > between different configurations - and there are no feedback from > the application side if the reboot actually went well. > The interactiviness does not fit well with an embedded target. U-Boot allows for canned command sequences and even shell scripts. > Do you know of a boot loader that partially or fully meets the above > requirements? U-Boot meets your rrequirements fully (and some more :-) > Today we are using VxWorks - for which we have made our own boot loader. > The boot laoder allows the boot loader itself, and the application part > to be upgraded - and if a restart is failed the old version will > be activated on a subsequent build. > I want the same behaviour in the Linux based target. ==> http://sourceforge.net/projects/u-boot See also: http://www.denx.de/re/DPLG.html If you have questions, send an email to the u-boot-users mailing list (or to me). Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de Bus error -- please leave by the rear door. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
