Re: a new port to sunxi arm9 platform suniv f1c100s

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

Hi,

On 17/02/2020 15:04, Jared McNeill wrote:
> Welcome Han!
>
> I'm not aware of any developers working on the F1C100s, but it is a very
> interesting SoC and I would love to have it supported in NetBSD!
>
> > 1. The generic kernel is adopted for ARMv7 series chips, if it could
> > be used for ARMv5 series chips, as there are many common used parts
> > for suniv
> > and the other sunxi chips.
>
> The generic startup code currently only supports v6 and v7. You will
> need to add support for v5 to sys/arch/arm/arm/armv6_start.S

This isn't a requirement and might be harder than creating a new
sys/arch/arm/arm/armv5_start.S.  We could look to merge it later on.


> > 2. The FDT device tree is working for generic kernel now, if we have
> > procedure for apply this for the other chips and boards, like
> > mini2440/imx2
> > series evaluation boards, includes my futher work for suniv f1c100s.
>
> Currently the GENERIC kernel is v7 only. You can still take advantage of
> FDT in other kernels, as demonstrated by NetBSD's RPI kernel.

sys/arch/evbarm/conf/GENERIC is indeed very much armv7 only.  Perhaps a
GENERICv5 is a good idea here?

I didn't do a GENERICv6 as I only have armv6 RPIs.

Feel free to ask more questions.

Cheers,
Nick