Towards an ARM system-building script

[Ganbold Tsagaankhuu]

On Mon, Sep 24, 2012 at 2:55 AM, Tim Kientzle <tim at kientzle.com> wrote:
> On Sep 4, 2012, at 9:52 PM, Tim Kientzle wrote:
>> On Sep 4, 2012, at 9:33 PM, Dave Cheney wrote:
>>
>>> Sorry to butt in on this discussion, but how feasible would it be to adapt this build script to the pandaboard. I understand there may be a config in svn similar to the beaglebone which may be applicable.
>>
>> I've started tinkering with ideas for generalizing my
>> BeagleBone script so it can build system images for
>> other boards.
>
> I've made significant progress and would
> appreciate any feedback:
>
>    github.com/kientzle/freebsd-beaglebone
>
> This has been massively refactored so it can
> build system images for a variety of
> ARM-based boards.  Right now:
>
>  * BeagleBone builds and boots cleanly again. ;-)
>     In particular, I've caught up with some changes to
>     ubldr in -CURRENT and switched to using the
>     stable DENX U-Boot sources instead of the
>     rapidly-evolving (and often broken) TI/Arago sources.
>
>  * PandaBoard:  I have a completely untested
>     sketch.  Someone with a PandaBoard will need
>     to work through the U-Boot configuration to make
>     this work.

I tried your script on PandaBoard ES.
Basically it works with some modifications/considerations:
1. PANDABOARD kernel config should be modified to use mmcsd card as root.
2. u-boot build complains about the board was configured to support THUMB mode
3. Maybe there is need some more patches to have correct u-boot.bin,
since it looks for uImage for instance
4. I didn't dig into ubldr/u-boot much, instead modified uEnv.txt to
load kernel.bin from first partition which is FAT. I tried 8MB of FAT.
5. I used MLO, u-boot.bin from http://people.freebsd.org/~gonzo/pandaboard/

So how does ubldr work? Can it load kernel.bin from second partition
in case of PandaBoard?

Ganbold

>
>   * RaspberryPi:  I have a completely untested
>     sketch that will need more work before it can
>     build a bootable image.
>
> Others?  If you're interested in adding support for
> other boards, let me know.  All the boards above:
>   * Are ARMv6-based.
>   * Have a kernel configuration in -CURRENT
>   * Boot from an MBR-partitioned SD card or USB stick
>   * Boot using U-Boot and ubldr
>
> It should be pretty straightforward to add support
> for other boards that meet these criteria.  The hardest
> part is working up the correct U-Boot patches; hopefully
> the existing BeagleBone patches will prove helpful
> to anyone who wants to work on this.
>
> Tim
>
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