Re: [Prex-devel] Porting recommendations

[Andrew D. <and...@gm...>]

On Thu, May 27, 2010 at 8:44 AM, David Given <dg...@co...> wrote:
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> There's a possibility I might be able to restart work on my Cybiko[*]
> port some time in the future. Since I stopped work, a new version of
> Prex came out; it's probably best for me to restart with a clean build.
>
> Where's the recommended place to start these days --- Kohsuke Ohtani's
> 0.9.0 version, or Andrew Dennison's 0.8.1 tree?

Hi David,

You may as well start with 0.9.0.

I've been having a break from maintaining a public version of Prex as
I don't have time to merge 0.9 with the product I'm working on. I
would really like to be tracking a public tree, instead of taking the
hit of another huge merge and the flow on round of bug fixing.

I've been meaning to strike up some discussion with Kohsuke to see if
I can help get a public tree going.

> To make life more complicated, the Cybiko only has 256kB ROM and
> 256-512kB RAM, so I have to be very careful about space. If I could run
> the kernel as XIP, rather than loading it into memory, that'd be ideal.
> Is that possible these days?

XIP for the kernel is fairly easy, there is support for that in my
tree and you should be able to port that to 0.9 fairly easily. We are
also doing XIP of userspace in our product, this was mainly just
writing a file system that stores files in aligned chunks of flash and
a few scattered tweaks.

Andrew