Re: BeagleBone Black , u-boot, and zImage

[Carlos Rafael Giani <dv@pseudoterminal.org>]

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.

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?