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?
--
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