8.0-RC1 panic attaching ppc
attilio at freebsd.org
Thu Sep 24 13:16:34 UTC 2009
2009/9/24 Daniel O'Connor <doconnor at gsoft.com.au>:
> On Wed, 23 Sep 2009, Attilio Rao wrote:
>> 2009/9/23 Daniel O'Connor <doconnor at gsoft.com.au>:
>> > If I enable the parallel port on this Gigabyte MA7785GM-US2H I get
>> > a trap 12 when booting up.
>> > I forgot to take a picture of it at the time but I should be able
>> > to reproduce it tomorrow.
>> > Has anyone seen anything before? (a quick google showed nothing). I
>> > did not see it on 7.2(ish) on the same hardware.
>> Are you able to enable KDB in your kernel config and return a
>> backtrace here?
> Yes, here it is..
> pmap_extract() at pmap_extract+0x13a
> isa_dmarangecheck() at isa_dmarangecheck+0x7a
> isa_dma_init() at isa_dma_init+0xda
> ppc_isa_attach() at ppc_sa_attach+0x40
> device_attach() at device_attach+0x69
> bus_generic_attach() at bus_generic_attach+0x1a
> acpi_attach() at acpi_attach+0x9f8
> (there's more but I imagine the above is probably sufficient).
> I took pictures, they are here
> If I put the parallel port in EPP mode then it works, I presume that's
> because it doesn't require a DMA channel whereas ECP doesn't. I haven't
> enumerated the possibilities though :)
Can you try to get a kernel dump that we can analyze?
You would just need to recompile the kernel with options KDB, GDB and
Then we can do more on that.
Peace can only be achieved by understanding - A. Einstein
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