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Date:      Fri, 4 Aug 2000 18:32:35 -0700 (PDT)
From:      John Baldwin <jhb@pike.osd.bsdi.com>
To:        Andrew Gallatin <gallatin@cs.duke.edu>
Cc:        alpha@FreeBSD.org
Subject:   Re: Problems with a PW500au
Message-ID:  <200008050132.SAA56426@pike.osd.bsdi.com>
In-Reply-To: <14730.54299.13237.456107@grasshopper.cs.duke.edu> from Andrew Gallatin at "Aug 4, 2000 10:53:47 am"

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Andrew Gallatin wrote:
> 
> John Baldwin writes:
>  > Digital Personal WorkStation 500au
>  > Console V7.2-1 Mar  6 2000 14:47:02
>  > >>>
>  > 
>  > I already have the latest. :(  Is it possible I have bad hardware in this
>  > box?
>  > 
>  > > It might be helpful to know what version of FreeBSD you're running &
>  > > what sort of hardware is connected.
>  > 
>  > Pardon the spam:
> 
> Nothing unusal there.  It is an older miata with the pyxis bug, but
> that's par for the course.
> 
> What sort of things are happening on the system other than the
> compilation?  Is it running X?  

Just compilation..  about 1 in every 2 buildworlds will trigger this...

> This is what I might expect to see if the palcode area was randomly
> scribbled over.  (hwrpb is at physical address 0x2000).
> 
> When it dumps like this, can you write down the PC and see what, if
> anything, it maps to in the kernel text?  Also, can you get an ra out
> of the SRM console at this stage, or is it totally wedged? (you should 
> be able to say something like ">>> e ra"

halt code = 2
kernel stack not valid halt
PC = fffffc0000527b8c
warning -- HWRPB is invalid.
>>> e ra
gpr:	IA(	R26) FFFFFC000051A70C

fffffc000051a6c0 T XentInt
fffffc000051a6ec T XentMM
fffffc000051a71c T XentSys
fffffc000051a77c T XentUna
...
fffffc0000527580 T userret
fffffc0000527920 t printtrap
fffffc0000527b80 T trap
fffffc00005281e0 T syscall

fffffc0000527b80 <trap>:
fffffc0000527b80:       0b 00 bb 27     ldah    gp,11(t12)
fffffc0000527b84:       f8 ed bd 23     lda     gp,-4616(gp)
fffffc0000527b88:       80 ff de 23     lda     sp,-128(sp)
fffffc0000527b8c:       10 00 5e b7     stq     ra,16(sp)
fffffc0000527b90:       18 00 3e b5     stq     s0,24(sp)
fffffc0000527b94:       20 00 5e b5     stq     s1,32(sp)

...

fffffc000051a6ec <XentMM>:
fffffc000051a6ec:       10 ff de 23     lda     sp,-240(sp)
fffffc000051a6f0:       c8 00 9e b7     stq     at,200(sp)
fffffc000051a6f4:       b8 00 5e b7     stq     ra,184(sp)
fffffc000051a6f8:       6e 32 40 d3     bsr     ra,fffffc00005270b4 <exception_save_regs>
fffffc000051a6fc:       02 00 7f 22     lda     a3,2(zero)
fffffc000051a700:       14 04 fe 47     mov     sp,a4
fffffc000051a704:       d0 b9 7d a7     ldq     t12,-17968(gp)
fffffc000051a708:       1d 75 5b 6b     jsr     ra,(t12),fffffc0000517b80 <prom_dispatch+0x40>
fffffc000051a70c:       0c 00 ba 27     ldah    gp,12(ra)
fffffc000051a710:       6c c2 bd 23     lda     gp,-15764(gp)
fffffc000051a714:       48 b7 7d a7     ldq     t12,-18616(gp)
fffffc000051a718:       3c 32 fb 6b     jmp     zero,(t12),fffffc000051700c <enter_prom+0xac>

HTH.

> Drew

-- 

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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