[meta-xilinx] How to make uImage for zynqmp

[Nathan Rossi]

On Mon, Oct 10, 2016 at 3:46 PM, Mike Looijmans <mike.looijmans at topic.nl> wrote:
> On 09-10-16 03:20, Cai, Chuntian (GE Transportation) wrote:
>
>> I using bitbake build Linux system for zcu102 board.
>>
>> I issue bitbake core-image-x11 , then I can found Image file in the deploy
>> folder, But I could not find uImage, and I want use uImage

uImage is not a valid target for aarch64/arm64 in the kernel (like it
is for arm). This is because "uImage" is actually shorthand for u-boot
wrapped zImage. And arm64 does not have support for zImage, thus also
does not have a uImage target.

(arm targets) https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/Makefile?id=refs/tags/v4.8#n365
(arm64 targets)
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/Makefile?id=refs/tags/v4.8#n135

---

A good question is why do you want to use uImage? If you are not aware
it is possible to boot a linux "Image" with the U-Boot "booti"
command.

However it is possible to wrap the kernel image with mkimage (or a FIT
blob if you are prepared to configure the image tree). For wrapping
with mkimage the command you will need is similar to:

mkimage -A arm64 -O linux -T kernel -C none -a 0x80000 -e 0x80000 -d
Image Image.ub

Also if you need mkimage, run the command using the mkimage built by
OE from the sysroot relative to the tmp/deploy/images/<machine>/
directory of your build (assuming you are on a x86_64 host):

../../../sysroots/x86_64-linux/usr/bin/mkimage ...

>>
>>
>> Could you tell me how to build uImage rather than Image
>
>
> Just setting KERNEL_IMAGETYPE="uImage" in the kernel recipe or machine
> config would do that.
>
> I think you can even specify multiple types in there.

You can, KERNEL_IMAGETYPES += "<extra ones>"

Regards,
Nathan

>
>
>
> Kind regards,
>
> Mike Looijmans
> System Expert
>
> TOPIC Products
> Materiaalweg 4, NL-5681 RJ Best
> Postbus 440, NL-5680 AK Best
> Telefoon: +31 (0) 499 33 69 79
> E-mail: mike.looijmans at topicproducts.com
> Website: www.topicproducts.com
>
> Please consider the environment before printing this e-mail
>
>
>
>
>
> --
> _______________________________________________
> meta-xilinx mailing list
> meta-xilinx at yoctoproject.org
> https://lists.yoctoproject.org/listinfo/meta-xilinx