Re: [Qemu-ppc] [OpenBIOS] [Qemu-devel] CUDA has problems with Mac OS 10.4

[Programmingkid]

On Nov 11, 2015, at 6:14 PM, BALATON Zoltan wrote:

> On Wed, 11 Nov 2015, Programmingkid wrote:
>> On Nov 11, 2015, at 4:32 PM, Andreas Tobler wrote:
>>>> It looks like you are saying you wish to keep the CUDA device. Mac OS 9 is 
>>>> most
>>>> likely hard coded to expect via-pmu instead of via-cuda on the mac99 
>>>> target.
>>>> Moving on to via-pmu might make QEMU more compatible with Mac OS 9.
>>>> I will still try your patches. Do you have a repo that I could just clone? 
>>>> It is a
>>>> lot less error prone than patches.
>>> 
>>> I'd like to keep the CUDA too, FreeBSD PowerPC (32-bit) relies on it. 
>>> Unfortunately it still doesn't work ... but hope is still here ;)
>> 
>> On a new world Mac? I'm thinking a mistake has been made. Maybe you mean 
>> via-pmu? According to FreeBSD's website all Macintoshes with a built-in USB 
>> port are supported. This would only mean new world Macs and they only have a 
>> via-pmu - no cuda device.
> 
> I think you are right that mac99 should have via-pmu instead of cuda but it 
> is not as simple as renaming it in the device tree because it is a different 
> chip which we have no emulation for so first an emulation should be written. 
> It is probably similar enough to cuda so using cuda instead works as long as 
> the OS in only using the main functions. It is also hard to find a 
> documentation on how via-pmu should behave. I've only found this:
> 
> http://mcosre.sourceforge.net/docs/apple_io.html
> 
> which is not very clear or detailed. The only hint from it was that pmu99 
> uses gpio which I've seen OS-es try to access but I don't know anything on 
> that or what should be emulated for it.

Thank you very much for this information. A quick check of PearPC shows it also 
uses CUDA, so we can't copy any code for via-pmu.

> 
>>> Mark, is your complete qemu patch available somewhere? Then I could test 
>>> 32-bit PowerPC on FreeBSD which still hangs on adb... up to now.
>> 
>> I'm thinking removing ADB support would fix this problem. Most real new 
>> world Macs have no ADB support.
> 
> This may be a good idea to match the hardware we are trying to emulate better 
> but some OSes may depend on ADB for now. I've noticed Finnix had no keyboard 
> in debug mode without ADB (which may be a bug in Finnix, I could not verify 
> if it works on real hardware or has the same problem there).

Interesting. Did you use "-usb -device usb-keyboard" to enable usb support in 
QEMU when running Finnix?