Re: [Qemu-devel] [RFC][PATCH 0/21] QEMU Object Model

[Anthony Liguori]

On 07/27/2011 10:33 AM, Paolo Bonzini wrote:
> On 07/27/2011 02:48 PM, Anthony Liguori wrote:
> > So the idea here is that the PIC will multiplex a bunch of interrupts
> > into a single line?
>
> Yes, but the device needs to know the interrupt number so it can expose
> it through the enumerator interface. So the configuration cannot be simply
>
> pic->irq[n] = tty->irq;
>
> Logically, it's more similar to the ISA case, but I doubt the PIC
> distributes all interrupts to everyone in real hardware.
>
> > Is the enumerator something that has an interface to devices where
> > the devices hold this info? Or is the enumerator just a bank of
> > flash that's preprogrammed with fixed info?
>
> The former, at least in theory. Not sure if it also works that way in
> real hardware, but that's the model it exposes and the way the Android
> guys implemented it.

I can't really find what you're describing.  I think all the specs are 
on http://www.milkymist.org/mmsoc.html

It's seems like there are a couple different kinds of busses, and that 
there is a CSR bus that is used to access configuration information but 
I believe only for CSR devices (which are low speed).

Can you point me towards the current code for this?

Regards,

Anthony Liguori