PCI_CTRL2_INTSTS_SHIFT
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
reg |= BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTSTS_SHIFT);
reg &= ~((0xF << PCI_CTRL2_INTSTS_SHIFT)
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
irq_stat = reg >> PCI_CTRL2_INTSTS_SHIFT;