[BCM4718] Broken interrupts

[Stanislav Galabov]

Hi Michael,

If I understand correctly the goal is to use INTRNG for MIPS?
If so, I didn't notice 'options MIPS_INTRNG' anywhere in your kernel config
files...
Please try to add this to your sys/mips/bcm471x/std.bcm471x for example and
let us know how this goes.

Best wishes,
Stanislav

On Fri, Mar 4, 2016 at 1:19 PM, Michael Zhilin <mizhka at gmail.com> wrote:

> Hi Adrian!
>
> Yes, KDB works. And yes, (today's finding) something is silly that force
> make IRQ5 endless. After processing of previous request, next request is
> starting. According to mips docs found in google, IRQ5 must be triggered
> only if count == compare. In my case, count increments on 0x20000 roughly,
> compare is constant. There is another finding: cause register is always
> 0x8000, even after call mips_wr_compare(). I suppose that this is possible
> reason of infinite IRQ5 requests, but still don't know how to fix it...
>
> Thx,
>  Michael
>
> On Fri, Mar 4, 2016 at 11:56 AM, Adrian Chadd <adrian.chadd at gmail.com>
> wrote:
>
> > hm, does kdb work (ie ,break to debugger at that point), or is the system
> > hosed?
> >
> > is it something silly like it getting stuck servicing interrupts
> > because they're not being correctly ACKed?
> >
> >
> >
> > -a
> >
> >
> > On 3 March 2016 at 12:22, Michael Zhilin <mizhka at gmail.com> wrote:
> > > Hi,
> > >
> > > I'm trying to load FreeBSD kernel on Broadcom MIPS router (ASUS
> RT-N16).
> > > Here is actual dmesg: http://pastebin.com/AtEz6kc9 . But my actual
> > problem
> > > is broken interrupts. After enabling of interrupts in
> > > autoconf.c:configure_final the MipsException code is called, it works
> > fine
> > > (including INTRNG), but cpu doesn't return to main thread (suprise!).
> > >
> > > I can see printf from clockintr, i.e. there are regular timer requests.
> > But
> > > there is no printf from main thread (autoconf.c) after enabling of
> > > interrupts.
> > >
> > > Also I've tried to simplify MipsException to avoid any issue with
> > > saving/restoring registers:
> > >     mfc0    k0, MIPS_COP_0_EXC_PC
> > >     rfe
> > >     jr    k0
> > >
> > > but still there is no return to main thread.
> > >
> > > I'm not familiar with JTAG and have no JTAG adapter for debugging. :(
> To
> > be
> > > honest, I've lost hope.
> > >
> > > What could possibly be wrong? Here is github branch for reference:
> > > https://github.com/Cka3o4Huk/freebsd/tree/user/mizhka/bcm471x
> > >
> > > Thank you in advance,
> > >  Michael
> > > _______________________________________________
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> > > https://lists.freebsd.org/mailman/listinfo/freebsd-mips
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> "
> >
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