Porting Ubuntu-Core

[Woodrow Shen]

Hi all,

As I used new ubuntu-image (0.14+real1) to create my armhf image, I also
got the same error as well. In order to try to fit the new spec of
gadget.yaml, I modified the gadget.yaml as follows:

device-tree: actduino_bubble_gum_sdboot_linux.dtb
volumes:
  roseapple-pi:
    schema: mbr
    bootloader: u-boot
    structure:
      - name: bootloader
        size: 4M
        content:
          - image: bootloader.bin
            offset: 2097664 #4097*512
          - image: u-boot.bin
            offset: 3145728 #6144*512
        type: bare
      - name: system-boot
        type: 0C
        filesystem: vfat
        filesystem-label: system-boot
        offset: 8388608
        size: 128M
        content:
          - source: boot-assets/
            target: /

And then this can avoid above the error during image creation. However, the
generated image lost the content of bootloader.bin & u-boot.bin at
the specific offset. So I think it may not follow the correct spec of
gadget.yaml. Can anyone help us to resolve the problem? Thanks.

Regards,
Woodrow

On Wed, Dec 21, 2016 at 11:15 AM, Bo Dong <bdong at ucrobotics.com> wrote:

> Hi Guys,
>
> We're now porting Ubuntu Core to an ARM64 on-chip computer, Bubblegum-96
> board. (http://www.96boards.org/product/bubblegum-96/)
> Here are some issues we got.
>
> When using ubuntu-image (tag:0.10+real 1 stable),
>
> *$ sudo /snap/bin/ubuntu-image --channel stable --image-size 2G
> --extra-snaps bubblegum96-gadget_16.04-1.1_arm64.snap --extra-snaps
> bubblegum96-kernel_3.10.0_arm64.snap -o bubblegum96.img bubblegum96.model*
>
> it could make valid image,bubblegum96.img.
>
> After update ubuntu-image using command *$ sudo snap refresh --beta
> --devmode ubuntu-image*, the ubuntu-image will be updated to beta (tag:
> 0.12+real 1). We using command
>
> $ sudo /snap/bin/ubuntu-image --channel beta --image-size 2G --extra-snaps
> bubblegum96-gadget_16.04-1.1_arm64.snap --extra-snaps
> bubblegum96-kernel_3.10.0_arm6*4.snap -o bubblegum96.img
> bubblegum96.model  *again, and it will report failure. It shows "gadget.yaml
> parse error: mbr structures cannot be larger than 446 bytes."
>
> The gadget.yaml file is the same before and after update ubuntu-image.
> Here it is:
> $ cat gadget.yaml
> device-tree: s900-96board.dtb
> volumes:
>   lemaker-guitar:
>     schema: mbr
>     bootloader: u-boot
>     structure:
>       - name: Bootstrap
>         type: mbr
>         size: 8M
>         content:
>           - image: bootloader.bin
>             offset: 2097664
>           - image: u-boot.bin
>             offset: 3145728
>       - type: 0C
>         filesystem: vfat
>         filesystem-label: system-boot
>         offset: 8388608
>         size: 128M
>         content:
>           - source: boot-assets/
>             target: /
>
> If we change the size: 8M directly to size:440, the image we made will be
> useless. Actually I don't know how to config offset after change the size.
>
> If we change the schema: mbr directly to schema: gpt, and change the type:
> mbr to type: gpt, it will fail again, and shows "gadget.yaml parse error:
> Invalid gadget.yaml @ volumes:lemaker-guitar:structure:0:type"
>
> I'd appreciate it a lot if there is anyone could help us with this.
>
> Thanks&&Best Regards
>
>
>
> --
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>
> http://www.ucrobotics.com.cn/
>
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-- 
Woodrow Shen
Software Engineer, Canonical ltd.
Devices | CE | Delivery, Taipei
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