mips24k (and others?) no longer works

[Michael Zhilin]

Hi Adrian,

I see bad fault a bit earlier: just after dozens of cycles of "init": at pc
= 0x4001e4, but it cou

What found by me: after page fault on file objects the page content is
filled with small delay, i.e. it results in race. If you add small piece of
work (black-hole-cpu) after fault (or context switch?), then the page is
filled with data (magic).

I want to find some time this weekend (tomorrow) to trace geom layer
(ktrace?).

Thanks!

On Fri, Nov 11, 2016 at 11:07 AM, Adrian Chadd <adrian.chadd at gmail.com>
wrote:

> Hiya,
>
> So mips on the atheros 24kc and 74kc parts is just completely borked.
> It varies between "this doesn't even boot" to "all I get are spams of
> failure exceptions", and if i back out a variety of hilarity, i end up
> with a userland that just plainly hangs after userland runs for a
> little while. No CTRL-T, nothing obvious in ddb. But hey, 'cont' in
> ddb now works.
>
> The working release for me is 304552, which is when I finished
> updating the atheros config files to use std.XXXX instead of
> ARXXXX_BASE.
>
> It's going to take some time to find the first point where things
> broke. It's likely going to be a combination of everyone's recent mips
> platform changes (most of the exceptions, the not-booting-at-all) and
> other unrelated kernel changes to other areas (likely the hang.)
>
> I ask that people hold off on the MIPS side of work until I figure out
> what's going on here.
>
> Also - I really do suggest you invest $40 in a carambola 2 so you have
> the AR9331 as a reference platform to do MIPS testing on. These
> mips24kc, FPU-less cut down SoCs are in a lot of things and having now
> heavily broken support for them is kinda sad. :( It's also putting a
> cramp on my ability to finish my net80211 and 11ac changes as a whole
> lot of it depends upon working AP hardware to test against.
>
> Thanks,
>
>
> -adrian
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