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Date:      Sun, 10 Sep 2000 17:29:38 -0700 (PDT)
From:      John Baldwin <jhb@pike.osd.bsdi.com>
To:        Bernd Walter <ticso@cicely5.cicely.de>
Cc:        Matthew Jacob <mjacob@feral.com>, dfr@FreeBSD.ORG, Christian Weisgerber <naddy@mips.inka.de>, freebsd-alpha@FreeBSD.ORG
Subject:   Re: cvs commit: src/sys/pci pcisupport.c (fwd)
Message-ID:  <200009110029.RAA28533@pike.osd.bsdi.com>
In-Reply-To: <20000909172204.A17373@cicely5.cicely.de> from Bernd Walter at "Sep 9, 2000 05:22:04 pm"

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Bernd Walter wrote:
> On Sat, Sep 09, 2000 at 02:17:49PM +0200, Bernd Walter wrote:
> > On Fri, Sep 08, 2000 at 02:55:56PM -0700, Matthew Jacob wrote:
> > > 
> > > This is what is broken for me too. I have not been able to really trace it
> > > down yet. I don't have the halt switch set up.
> > 
> > If I hardcode cia_pcib_read_config() and  cia_pcib_write_config() to
> > use bwx the machine boots at least into singleuser - not tested more yet.
> > What is the special deal with the swiz stuff?
> > As far As I understood it hangs on the first width 2 read access which is the
> > second acces to the first available device. While the width 4 acces to probe
> > for existence succeded.
> > 
> > > > > pci0: physical bus=0
> > > > > cia_pcib_read_config: b=0, s=0, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=1, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=2, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=3, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=4, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=5, f=0, reg=0, width=4
> > > > > cia_pcib_read_config: b=0, s=5, f=0, reg=0, width=2
> 
> I was able to use it but got a panic after starting cvsup:
> fatal kernel trap:
> 
>     trap entry = 0x2 (memory management fault)
>     a0         = 0x0
>     a1         = 0x1
>     a2         = 0x0
>     pc         = 0xfffffc00005168c8
>     ra         = 0xfffffc0000516f70
>     curproc    = 0xfffffe000a39c440
>         pid = 2476, comm = cvsup
> 
> Stopped at      mtx_exit_hard+0x108:    ldq     t1,0(s1) <0x0>  <t1=0x1,s1=0x0>
> db> trace
> mtx_exit_hard() at mtx_exit_hard+0x108
> userret() at userret+0x1d0
> trap() at trap+0x828
> XentMM() at XentMM+0x20
> (null)() at 0x120270038
> 
> I don't know if it is because of my changes, the SMPng code or
> something else.
> I would asume it's because of SMPng

Yes, I'm trying to work on this one, but I'm still trying to get kgdb
working.

-- 

John Baldwin <jhb@bsdi.com> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/


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