[mel-discuss] BeagleBoard XM - manual boot

[Ricardo Anguiano]

"Cherry, John" <John_Cherry at mentor.com> writes:
> A note from the quickstart guide that might be handy if you are having
> difficulties auto-booting from uboot...

If you are looking for a more automated workaround here are a couple.
After following either set of instructions below, your board should just
boot.

------------------------------------------------------------------------
Workaround #1: Put the uImage file where u-boot expects it

In the boot messages you can see that u-boot is looking for the uImage
kernel file in /boot/uImage on the second partition of the mmc card:

     Relevant uImage Boot Error
     Loading file "/boot/uImage" from mmc device 0:2 (xxa2)
     ** File not found /boot/uImage

The workaround is to put a copy of the uImage kernel file where u-boot
expects it:

     # mount /dev/sdc2 sdc2
     # cp -f <mel-kit>/beagleboard/binary/uImage-beagleboard.bin /mnt/sdc2/boot/uImage

------------------------------------------------------------------------
Workaround #2: Use uEnv.txt and boot.scr to get u-boot to read the
uImage file from the first partition

In the boot messages you can see that u-boot tries to load a file called
uEnv.txt:

     reading uEnv.txt
     ** Unable to read "uEnv.txt" from mmc 0:1 **

Create a uEnv.txt and boot.scr on the first partition of the mmc card as
shown below:

     uEnv.txt
     bootenv=boot.scr
     loaduimage=fatload mmc ${mmcdev} ${loadaddr} ${bootenv}
     mmcboot=echo Running boot.scr script from mmc ...; source ${loadaddr}

See also, http://archlinuxarm.org/forum/viewtopic.php?f=28&t=1940

The contents of the boot.scr.txt input come from the workaround
instructions for non-booting boards in the MEL-KIT for beagleboard
installation and quick start guide page 8 section titled "Booting the
BeagleBoard with MEL kit":

     mmc rescan ${mmcdev}; fatload mmc ${mmcdev} ${loadaddr} uImage
     setenv bootargs console=${console} ${optargs} mpurate=${mpurate} buddy=${buddy} buddy2=${buddy2} camera=${camera} vram=${vram} omapfb.mode=dvi:${dvimode} omapdss.def_disp=${defaultdisplay} root=/dev/mmcblk0p2 rootfstype=${mmcrootfstype}
     bootm ${loadaddr}

Then make the boot.scr:

     # mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "Pandaboard boot script" -d boot.scr.txt boot.scr

Then copy uEnv.txt and boot.scr onto the first partition of your card:

     # mount /dev/sdc1 sdc1
     # cp -f boot.scr uEnv.txt /mnt/sdc2

Thanks,
-- 
Ricardo Anguiano
Mentor Graphics
+1-510-354-6774