Question about interrupt controller and timer enable for sail arm model

[Jubo-Xu]

Hello, sorry for bothering you, I'm now working on booting a tiny linux on sail-arm model, the tiny linux is based on Raspberry-Pi-OS, for lesson03, it mainly set up the exception vector table, enable the interrupt controller, and enable the timer, and print something in interrupt handler, but for sail-arm, I'm just wondering how could I enable the timer and interrupt controller so that I could do the samething, I tried the same way to enable timer and set COUNTER_FREQUENCY to cntfrq_el0, but still not working.