public static void SetAPICBase(Pointer apic)
{
uint edx = 0;
uint eax = (uint)(((uint)apic & 0xfffff0000) | IA32_APIC_BASE_MSR_ENABLE);
/*if (PAE)
* edx = (apic >> 32) & 0x0f;*/
MSR.SetMSR(IA32_APIC_BASE_MSR, (ulong)(edx << 32) | (ulong)eax);
}
public static Pointer GetAPICBase()
{
ulong msr = MSR.GetMSR(IA32_APIC_BASE_MSR);
uint eax = (uint)msr;
uint edx = (uint)(msr >> 32);
/*if (PAE)
* return (eax & 0xfffff000) | ((edx & 0x0f) << 32);
* else
*/return((Pointer)(eax & 0xfffff000));
}
public static void Setup(Pointer localApic, Pointer ioApic)
{
LocalApic = localApic;
IOApic = ioApic;
if (!MSR.HasMSR())
{
return;
}
// Hardware enable the Local APIC if it wasn't enabled
SetAPICBase(GetAPICBase());
// Set the Spurious Interrupt Vector Register bit 8 to start receiving interrupts
WriteRegister(0xF0, ReadRegister(0xF0) | IA32_APIC_BASE_MSR_BSP);
}
