Re: [Qemu-devel] atapi on ppc issue (was Re: qemu-system-ppc broken ?)

["René Rebe" <rene@exactcode.de>]

Blue Swirl wrote:
> On 11/16/08, Laurent Vivier <laurent@lvivier.info> wrote:
>   
>>  Le 16 nov. 08 à 20:32, Blue Swirl a écrit :
>>
>>
>>
>>     
>>> On 11/11/08, Laurent Vivier <Laurent.Vivier@bull.net> wrote:
>>>
>>>       
>>>> Le lundi 10 novembre 2008 à 21:01 +0100, Andreas Färber a écrit :
>>>>
>>>>
>>>>         
>>>>> Am 09.11.2008 um 23:07 schrieb François Revol:
>>>>>
>>>>>
>>>>>           
>>>>>>>>> Though I still can't seem to get OpenHackware to read the CD:
>>>>>>>>> ERROR: ATAPI TEST_UNIT_READY : status 50 != 0x40
>>>>>>>>>
>>>>>>>>>                   
>>>>>>>> I suppose OpenHackware only compares instead of checking the
>>>>>>>>                 
>> ready
>>     
>>>>>>>> bit...
>>>>>>>>
>>>>>>>>                 
>>>>>>>               
>>>>>> The attached patch makes OpenHackware happy again.
>>>>>> At least qemu-system-ppc can now start debian iso, and mine as well
>>>>>>
>>>>>>             
>>>>> [...]
>>>>>
>>>>>           
>>>>>> OpenHackware should be fixed instead, but it seems the binary in svn
>>>>>> has been updated after the last sources I found
>>>>>>
>>>>>>             
>>>>> [...]
>>>>>
>>>>>           
>>>>>> Seems the last update was already about ATAPI...
>>>>>> Anyone has the latest source used ?
>>>>>> I could at least fix it to check for bits on errors...
>>>>>>
>>>>>>             
>>>>> Rene Rebe recently posted some diff against qemu's OHW diff, but it
>>>>> appeared to be whitespace-damaged.
>>>>>
>>>>>
>>>>>           
>>>>>> Of course it'd be much better to switch to a real OF instead...
>>>>>> but I don't have the time for that, couldn't find usable OpenBIOS
>>>>>> images,
>>>>>>
>>>>>>             
>>>>> I once tried to get OpenBIOS working but failed, Laurent appeared to
>>>>> get some further - any update on that?
>>>>>
>>>>>           
>>>> No, I stopped working on this because I had no time.
>>>>
>>>> In fact, if I remember correctly, OpenHW initializes PCI devices whereas
>>>> OpenBIOS doesn't, I've started working on this but it is too much work
>>>> form me. I had a working OpenBIOS, able to start a kernel (at some
>>>> time), but stopping during boot.
>>>>
>>>> If someone is interested (perhaps) I can find my patches and send them
>>>> (privately).
>>>>
>>>>         
>>> I would be interested. I finally created a PowerPC cross compiler and
>>> I'd like to test OpenBIOS for PPC.
>>>
>>>       
>>  Yes, Andreas had the same request.
>>  For the moment I'm trying to re-create a cross-compiler to test and sort my
>> patches.
>>     
>
> With the attached hack I'm able to boot
> debian-40r5-powerpc-businesscard.iso, though it hangs after:
> Calling quiesce ...
> returning from prom_init
>
> The same happens with 0.8.2, so I think Qemu is in a way "correct".
> Now all I need to do is to find a nice OS that really can be
> installed. Any suggestions?
>   
That's probably due:

 > Second, Linux 2.6 flatten_device_tree stuff in 
arch/powerpc/kernel/prom_init.c
 > check for a return value of 1, as I do not have the IEEE spec on my desk
 > I assumed it means success, and with the change the flattened device
 > tree is no longer empty, helping a great deal continuing to boot ...

As I reported and provided a patch for on 05/06/2008 06:00 PM.
[Qemu-devel] [PATCH] fix PPC OpenHackWare for Linux 2.6

Yours,
  Rene

-- 
  René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
  http://exactcode.de | http://t2-project.org | http://rene.rebe.name