Hello,
in the function __ipipe_grab_irq for the NIOS2, there is the following block :

if (likely(irq == __ipipe_hrtimer_irq)) {
        __raw_get_cpu_var(__ipipe_tick_regs).estatus = regs->estatus;
        __raw_get_cpu_var(__ipipe_tick_regs).ea = regs->ea;
        if (!__ipipe_root_domain_p) {
            __raw_get_cpu_var(__ipipe_tick_regs).estatus &= ~NIOS2_STATUS_PIE_MSK);
              }
    }

We do not understand why there is an unusual case for an interruption from the timer. We understand each lines but not the global nature. Any help ?

Cheers
Adrien Chiron & Vincent Vanbesien