Re: [9fans] Porting plan9

[Steven Stallion <sstallion@gmail.com>]

They do. In fact, I contributed a patch a while back to add u-boot
image support to 5l a while back. U-boot has also been patched to
expect these binaries. You can take a look at what has been done in
the Chromebook port (http://code.google.com/p/9chrome), but I've been
stalled due to demands at the office.

FWIW, u-boot is not a net-negative at all. For SoC's it simplifies
boot significantly - there is zero reason to eschew the functionality
it brings.

http://plan9.bell-labs.com/sources/contrib/stallion/patch/arm-uboot/

HTH,

Steve

On Mon, Dec 1, 2014 at 2:43 AM, Ramakrishnan Muthukrishnan
<ram@rkrishnan.org> wrote:
> On Mon, Dec 1, 2014, at 11:14 AM, erik quanstrom wrote:
>> > Surprisingly I didn't see a paper on porting Plan9 to new architectures
>> > in the plan9 paper collection. Any help and pointers on how to get
>> > started with the porting effort will be highly appreciated.
>>
>> it's all about the documentation.  if you can get it, boringing up a new
>> kernel for a new architecture can go from impossible to very doable.
>> it's still a lot of work, and it can be hard to sit down and spend a week
>> finding that one little bit that prevents anything from working.  good
>> luck, nonetheless.  more architectures is definately moar better.
>
> Thanks. IMX6 documentation is freely available. There is a version of
> u-boot. The manufacturer (Solid Run) also has made the board schematics
> etc available.
>
> From the reading of booting(8), I am assuming that the ARM devices in
> plan9 use the u-boot for booting the kernel up?
>