GICv3 GIC500

Hi,

The GICv3 in the new Pi hal seems Pi specific.
Is that the way it is going to be in the future?

Have you looked into running it in compatibility mode?
It is bit 4 in distributor control.

Asking for a friend :D

From what I can see from “my friends” debug output , the ARE_NS bit is 0 when in 32bit mode. So it should support the compat mode? Or I was looking at wrong print out , it is set to “1”…

So I have done a more generic implemenation.. It seems like u-boot sets up things nice

I get timer interrupt once, but after that the GIC stops generating interrupts. Anyone knows why?

In the Pi4 code you don’t clear the interrupt in GIC, I have experimented with doing that , but it didn’t change anything.

The centiclock is fixed to “1” :D

Found the problem:
In irqsource I have:
MRC p15,0,a1,c12,c12,0
And in IRQClear I needed:
MCR p15,0,a1,c12,c12,1

Working perfect now!