Re: [Qemu-devel] [RFC] Plan for moving forward with QOM

[Anthony Liguori]

On 09/15/2011 03:23 PM, Avi Kivity wrote:
> On 09/15/2011 04:26 PM, Anthony Liguori wrote:
> > I think this model is the closest to what we have today and is the most
> > obvious. For something like ne2k, I would expect:
> >
> > class NE2000 : public Device
> > {
> > // ne2k public functions
> > };
> >
> > class PCI_NE2000 : public PciDevice
> > {
> > // implement PCI functions by calling ne2k public functions
> > NE2000 ne2k;
> > };
> >
> > class ISA_NE2000 : public IsaDevice
> > {
> > // implement ISA functions by calling ne2k public functions
> > NE2000 ne2k;
> > };
>
> Also, NE2000 methods have to call ISA_NE2000 and PCI_NE2000 methods, yes?

I don't think so.  The NE2k would export an IRQ and the ISA_NE2K and PCI_NE2k 
would have to route that IRQ.  But I think that's the extent of the 
communication in that direction.

Am I missing something?

Regards,

Anthony Liguori

 That's
> going to be more difficult. Not impossible, just hard. It's probably going to
> involve device specific code that models what type of glue was used for that
> particular device/bus combo.