NICVF_INTR_MBOX_SHIFT
#define NICVF_INTR_MBOX_MASK (1 << NICVF_INTR_MBOX_SHIFT)
reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT);
reg_val |= (1UL << NICVF_INTR_MBOX_SHIFT);
reg_val = (1UL << NICVF_INTR_MBOX_SHIFT);