Re: BeagleBone Black , u-boot, and zImage

[Maciej Borzecki <maciej.borzecki@open-rnd.pl>]

On Thursday 14 of August 2014 22:09:01 Carlos Rafael Giani wrote:
> On 08/14/2014 10:04 PM, Denys Dmytriyenko wrote:
> > On Thu, Aug 14, 2014 at 09:53:34PM +0200, Carlos Rafael Giani wrote:
> >> Hello,
> >> 
> >> after building a rootfs for the Beaglebone Black, I see the
> >> following files in the deploy folder for the machine:
> >> 
> >> MLO
> >> u-boot.img
> >> u-boot-spl.bin
> >> zImage
> >> 
> >> as well as other symlinks with "-beaglebone" attached to their filenames.
> >> 
> >> What should I copy, the SPL bin, or the .img u-boot binary?
> >> Also, u-boot tries to load a uImage, even though a zImage was built.
> >> There is also no uEnv.txt file.
> >> Do I have to write one to be able to let u-boot load the zImage, or
> >> should it work out-of-the-box?
> > 
> > Depends on the rootfs image you are building. Most images that are based
> > on
> > core-image-base will take care of deploying necessary pieces into the
> > rootfs. But core-image-minimal is special and very bare-bone, so extra
> > manual steps are required.
> > 
> > Regardless of the rootfs image, you'd need MLO and u-boot.img to be
> > located in the first FAT partition of your SD card or eMMC flash.
> > 
> > Then, if your rootfs does not already have zImage and the necessary DTB
> > files in the /boot directory, you have to place them there (i.e.
> > core-image-minimal) and you are ready to boot. All the defaults will work
> > for out-of-the-box in this case. No uEnv.txt is necessary, unless you
> > need to do something extra special...
> 
> Oh, I just built core-image-base .
> 
> So I should use the .img and not the SPL .bin? I was wondering if the
> SPL bin is a newer binary that will eventually replace the .img one.
> 
> But when I use the .img file, it turns out that it tries to load a
> uImage, even though a zImage was built. Simply setting the bootfile env
> var to "zImage" won't work, because the u-boot script will try to boot
> with the incorrect command.

Try setting bootfile=zImage in uEnv.txt in the first partition.

> 
> I am trying to rule out that something went wrong in my build, that
> something is wrong in my setup. If I build core-image-base , the
> resulting u-boot.img should automatically load a zImage, not a uImage,
> correct?

Can you post serial output from uboot?

Your default environment should look similar to what is here:
http://git.denx.de/?p=u-boot.git;a=blob;f=include/configs/am335x_evm.h;h=a48b386477167010c8e0d206423a3bdbe611cf83;hb=524123a70761110c5cf3ccc5f52f6d4da071b959#l78



-- 

Maciej Borzęcki 
Senior Software Engineer Open-RnD Sp. z o.o. 
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