IOAPICENTRY_FLAG_EN
if (apic->apic_flags & IOAPICENTRY_FLAG_EN)
if (!(apic->apic_flags & IOAPICENTRY_FLAG_EN))
mpei->apic_flags = IOAPICENTRY_FLAG_EN;
(entry->apic_flags & IOAPICENTRY_FLAG_EN) ? "usable" : "unusable" );