Re: [Xen-devel] [GSoC-2019] About the crossbar and xen

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 10 Jul 2019, Denis Obrezkov wrote:
> Hi,
> 
> On 7/10/19 9:49 PM, Stefano Stabellini wrote:
> 
> > 
> >   phandle = <0x00000002>;
> > 
> > I think that means that interrupts go to the GIC via Crossbar; i.e. the
> > parent interrupt controller of Crossbar is the GIC.
> > 
> But the crossbar's interrupt-parent node is 0x00000008 and phandle value
> 0x00000008 belongs to
> interrupt-controller@48281000 {
>               compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";
> 
> For me it looks like interrupts from crossbar goes to wugen and the from
> wugen to GIC. But I don't quite understand it.

Hi Denis,

I only read your email and got a partial picture. I read the full device
tree now and the hierarchy is as follow:

- crossbar routes to phandle 8
- phandle 8 is omap5-wugen-mpu and routes to phandle 2
- phandle 2 is the GIC

So:

crossbar -> omap5-wugen-mpu -> GIC

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel