IRQ_DISABLE
ampintc_route(irq, IRQ_DISABLE, ci);
agintc_route(sc, irq, IRQ_DISABLE, ci);
ampintc_route(irq, IRQ_DISABLE, ci);
ampintc_route(irq, IRQ_DISABLE, curcpu());
plic_intr_route_grid(irq, IRQ_DISABLE, cpu);
plic_intr_route_grid(irq, IRQ_DISABLE, cpu);