Re: Booting NetBSD/evbarm on QEMU (IntegratorCP)

[Nick Hudson <skrll%netbsd.org@localhost>]

On 02/08/13 10:04, Sergio López wrote:
> 2013/2/8 Jeff Rizzo <riz%boogers.sf.ca.us@localhost>:
> > Playing around a bit more, I suspect there's some timer issues;  for
> > example, pinging another host results in a several-second-per-packet delay,
> > though the RTTs look reasonable and short.  Also, the RTC loses about 30m
> > per hour.
> Thanks for the QA! :-)
>
> I've produced a new patch:
>
> http://blogs.nologin.es/slopez/uploads/integrator-cp-2013-02-08.diff

Thanks for updating.

I have some more comments/questions

+#if defined(INTEGRATOR_CP)
+    if (plcomconsattached != 1) {
+#else

Why is this needed? I admit I never actually tested the ifpga plcom 
stuff when I committed
it. I did ask, but no-one seems to have the original integrator hardware 
anymore.


> <---->
> cpu0 at mainbus0 core 0: ARM1136J-S r1p3 (ARM11J V6J core)
> cpu0: DC enabled IC enabled WB disabled EABT
> cpu0: 4KB/32B 4-way L1 Instruction cache
> cpu0: 64KB/32B 4-way write-through L1 Data cache
> Undefined instruction in kernel
> Stopped in pid 0.1 (system) at  netbsd:vfp_attach+0x124:        mrc
>   p10, 7, r
> 1, c7, c0, 0
> db>
> <---->
>
> I haven't took much time to look into this, so I'm not sure if this is
> a problem with QEMU, binutils, or that piece of code.


I suspect QEMU doesn't emulate the instruction correctly. I did a quick 
scan of
qemu 1.3.0 (from pkgsrc) and I couldn't see a ARMCPRegInfo with cp = 10.


> Sergio.

We should probably add something. :)

Nick