HW_BROADWAY_IMR
in_be32(io_base + HW_BROADWAY_IMR);
out_be32(io_base + HW_BROADWAY_IMR, 0);
clrbits32(io_base + HW_BROADWAY_IMR, mask);
clrbits32(io_base + HW_BROADWAY_IMR, 1 << irq);
setbits32(io_base + HW_BROADWAY_IMR, 1 << irq);