Re: [9fans] Porting plan9

[Ramakrishnan Muthukrishnan <ram@rkrishnan.org>]

On Tue, Dec 2, 2014, at 03:24 AM, Steven Stallion wrote:
> 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,

Thanks. That is very helpful. I will look at your patches.

Ramakrishnan

> 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?
> >
>