Porting Ubuntu-Core

[Bo Dong]

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



-- 
董波
uCRobotic
Mobile: +86 15624957162

http://www.ucrobotics.com.cn/
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