APIC_INT_PIN_MASK
mip->ioapic_ih &= ~APIC_INT_PIN_MASK;
#define APIC_IRQ_PIN(x) ((x & APIC_INT_PIN_MASK) >> APIC_INT_PIN_SHIFT)
mip->ioapic_ih &= ~APIC_INT_PIN_MASK;
#define APIC_IRQ_PIN(x) ((x & APIC_INT_PIN_MASK) >> APIC_INT_PIN_SHIFT)