Re: [Qemu-devel] [Patch 1/2] switch support v2

[Armin <akuster@kama-aina.net>]

Laurent Vivier wrote:
> Le mardi 18 décembre 2007 à 08:40 -1000, Armin a écrit :
>   
>> Laurent Vivier wrote:
>>     
>>> Le lundi 17 décembre 2007 à 09:40 -1000, Armin a écrit :
>>>   
>>>       
>>>> Laurent Vivier wrote:
>>>>     
>>>>         
>>>>> Hi,
>>>>>
>>>>> if you just want to configure which bank to use with pflash, perhaps you
>>>>> can do something like:
>>>>>
>>>>> qemu -drive if=pflash,unit=0
>>>>>
>>>>> to use the first bank, and
>>>>>
>>>>> qemu -drive if=pflash,unit=1
>>>>>
>>>>> to use the second bank.
>>>>>   
>>>>>       
>>>>>           
>>>> Yes, that might work for the flash case but does not address other 
>>>> switches settings. In my case, the Mainstone has two rotary switches 
>>>> that define which frequency to boot up in.
>>>>     
>>>>         
>>> But I don't think qemu able to emulate frequency ?
>>> So it should be useless.
>>>   
>>>       
>> I am sure that is true and my example might be very week in the above case.
>> I think if a board we are trying to emulate has boot time configurations 
>> governed by  jumpers or switches for enabling or disabling certain 
>> hardware devices , then having a runtime solution seems more 
>> appropriate.  It seems silly to have to rebuild to qemu if one wants to 
>> switch device A to be uart #2 from an IrdA device when using "-switches 
>> 1=on" could do the same.
>>     
>
> Well, my opinion is not really important here, but I think "-switches
> 1=on" is too low level... using the "meaning" could be more
> user-friendly, something like "-deviceA uart2".
>   
Sure your opinion matters, I can get an idea stuck in my little brain 
and not see the trees in the forest.  "-device", that got me thinking...
Lets say I have a mips port that has one PCI slot on it. I could get a 
listing of PCI cards supported by this port and select one for use by 
that PCI slot.
This could be extended for local bus (i.e switches & jumpers) , PCMCIA 
and SD slots.

Regards,
Armin