I'm doing some BSP work trying to get an interrupt to fire using hte Time Base Registers (upper/lower), Timer Control Register, Machine Status Register and either the HID0 or CTBENU/CTBSELU registers.
I see the TB is actively incrementing so it must be getting clocked. I've written 0x0002_9000 to the MSR and tried two values (0x2804_0000, 0x3804_0000) in the TCR. I never see the TSR change. What else am I missing? I haven't attached an interrupt handler yet but from what I'm seeing, I don't think it would be called yet.