[OpenBIOS] Faulty Qemu SPARC64 IDE emulation?

[Igor Kovalenko]

On Thu, Dec 10, 2009 at 12:11 AM, Nick Couchman <Nick.Couchman at seakr.com> wrote:
>>
>>
>> That's interesting. From the whole output you posted in the pastebin, it
>> looks as if the IDE control register is located at 0x682 and various
>> bits of data are written between 0x600 and 0x607.
>>
>> However, then something does terribly wrong mid-request and the write
>> addresses change to 0x500-0x507 with a control register at 0x582, then
>> 0x600-0x607 with a control register at 0x582 and then 0x700-0x707 with a
>>   control register of 0x682 again.
>>
>> I'm current leaning towards this being a bug in Qemu...
>>
>>
>
> So perhaps the 57 that it tries to write as an IDE CMD is getting pulled out of a memory location that the IDE code shouldn't be accessing?
>


Well qemu's crash is a bug in qemu for sure. The garbage being written
is probably due to device i/o mapping issues (could clash with
physical ram mapped low) so is separate issue. Of course we will need
to solve both :)
Do you see screen garbage before crash?

-- 
Kind regards,
Igor V. Kovalenko