Re: [Adeos-main] Advice regarding MIPS port

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Florent Audebert wrote:
> Hi,
> 
> I'm back on my work concerning Adeos port on MIPS. I'm a little bit lost atm.
> 
> My kernel is stuck in calibrate_delay() loop. Timer interrupts seem to
> occur well but my i-pipe is stalled. There is no arch-dependent places
> where I explicitely unstall root domain.

The root domain should be unstalled in the start_kernel function, file
init/main.c by the call to local_irq_enable(), which should result in an
ipipe_unstall_root().


> I saw fast stall / unstall
> calls in other archs entry.S. Are these calls mandatory or are they
> here in order to reduce latency ?

They are mandatory in a final I-pipe patch, but you can ignore them for
a first attempt, without them, you will get big latencies, that is all.

> 
> In case the previous asumption is false, is there any other potential
> leads ? (Something wrong in my local_irq_* ?)

Well, when debugging, every ugly hack is permitted, so you can put as
much printks as you want in the interrupt handler or the calibrate delay
loop.

> 
> I didn't post my code so far since nothing is working yet... If you
> think it could worth it, I'll be glad to send you a git-diff from my
> 2.6.24 working directory.
> 


-- 
                                                 Gilles Chanteperdrix