Hi,
I'm trying to setup the physical non secure timer.
I'm in EL1 ttbr1, core0 and got there thorugh el2 so I can't modify or read SCR_EL3 but cleared HCR_EL2 so IMO, FIMO and AMO are set to 0.
I'm enabling the time like the flollwing:
asm volatile ("mrs x1, CNTFRQ_EL0"); asm volatile ("msr CNTP_TVAL_EL0, x1"); asm volatile ("mov x0, 1"); asm volatile ("msr cntp_ctl_el0, x0");
And then enabling gicc/gicd, setting the priorities and enabling int 30.
When I call a svc exception my exception table vector gets called, so I would expect the same for the timer.
But when the timer is triggered (which I'm checking with ISR_EL1 and cntp_ctl_el0) none of my functions in the exception vector is called.
DAIF is set to all 0 but ISR_EL1 does not indicate an pending irq anymore, when I set daif serror to 1. so maybe there is an exception in the timer irq call? If so, what can cause such a behavior?
greets from germany!