[uClinux-dev] MCF5275EVB, booting linux from Flash

[Aitor Calderón]

El Jueves, 22 de Febrero de 2007 17:15, Calin Onofrei escribió:

> I've found your patch for u-boot(u-boot-1.1.6-5275.patch. I have another
> question please. After installing u-boot, there is any special
> configuration for uclinux to start from Flash? Regards,

You need to create an "uImage". Its an image with certain headers.
You  can create it with 'mkimage -A m68k -O linux -T kernel -C gzip -a 20000 
-e 20000 -n "your image" -d image.bin.gz uImage'
where image.bin.gz its the gziped uclinux image.

You can find mkimage command in your-uboot-dir/tools/mkimage

I have copied it to 0xfff40000 in flash, so I can load it from u-boot with 
command 'bootm fff40000'.

If you want to load it at boot time, edit M5275EVB.h file located at 
include/configs/ and change CONFIG_BOOTDELAY to 0 (I have 5 here, since I 
dont wont it starts inmediatly) and add a line like this:
#define CONFIG_BOOTCOMMAND "bootm fff40000" 
changing de fff40000 to the address where you have copied the image.

More info in the README, doc/README.autoboot and http://www.denx.de/wiki/DULG

Please, tell me if you success running u-boot, to know if it works in other 
board than mine and the patch it's correct.

 Regards,
 Aitor.