LAPIC_ID
return i82489_readreg(LAPIC_ID) >> LAPIC_ID_SHIFT;
return x2apic_readreg(LAPIC_ID) & X2APIC_ID_MASK;
#define lapic_cpu_number() (i82489_readreg(LAPIC_ID)>>LAPIC_ID_SHIFT)
LAPIC_ID));