internal static IoApic [] CreateIOApics()
{
// Prefer to get the list of IoApics from the MADT
Madt madt = AcpiTables.GetMadt();
if (madt != null)
{
ArrayList alist = madt.GetIoApics();
if (alist.Count > 0)
{
IoApic [] apics = new IoApic[alist.Count];
for (int i = 0; i < alist.Count; i++)
{
// Have to convert from a ...Hal.Acpi.IoApic into a Hal.IoApic:
Microsoft.Singularity.Hal.Acpi.IoApic sourceEntry = (Microsoft.Singularity.Hal.Acpi.IoApic)alist[i];
IoApic destEntry = new IoApic(sourceEntry.Address, sourceEntry.InterruptBase);
destEntry.SetId(sourceEntry.Id);
apics[i] = destEntry;
}
DebugStub.Print("Created IoApics from MADT table\n");
return(apics);
}
}
DebugStub.Print("Created IoApics from MpResources table table\n");
// Otherwise, create from Mp tables
return(CreateFromMpResources());
}
private void InitializeProcessorCount()
{
Madt madt = AcpiTables.GetMadt();
if (madt != null)
{
processorCount = madt.GetLocalApics().Count;
}
else if (MpResources.ProcessorEntries != null)
{
processorCount = MpResources.ProcessorEntries.Count;
}
else
{
processorCount = 1;
}
//
// Platform.ThePlatform.CpuRealCount was setup by
// the boot loader and should be the same that we read here.
//
DebugStub.Assert(Platform.ThePlatform.CpuRealCount == processorCount);
}
public override byte TranslatePciInterrupt(byte currentInterruptLine,
byte pciInterruptPin,
PciPort pciPort)
{
//
// The pin number in the tables is zero based, while the pin number
// from the PCI config space is 1-based. So convert to the table space.
//
pciInterruptPin -= 1;
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("HalApic: Translating interrupt for PCI device 0x{0:x} pin {1} on Bus 0x{2:x}\n",
__arglist(pciPort.Device, pciInterruptPin, pciPort.Bus));
#endif
//
// By default, if we can't find the device, we'll return the current
// interrupt line.
//
byte resultLine = currentInterruptLine;
foreach (MpInterruptEntry interruptEntry in MpResources.IoInterruptEntries)
{
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("Found interrupt entry bus 0x{0:x} busIrq 0x{1:x} => ApicId 0x{2:x} ApicLine 0x{3:x}\n",
__arglist(interruptEntry.BusId,
interruptEntry.BusIrq,
interruptEntry.ApicId,
interruptEntry.ApicLine));
#endif
//
// According to the MPS spec: for PCI buses, the bus IRQ in the table entry
// contains the pin in the low two bits, and the device number in the next
// five bits (and the rest are reserved).
//
if ((interruptEntry.BusId == pciPort.Bus) &&
((interruptEntry.BusIrq & 3) == pciInterruptPin) &&
(((interruptEntry.BusIrq >> 2) & ((1 << 5) - 1)) == pciPort.Device))
{
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("Found device 0x{0:x} connected to IoApic Id 0x{1:x}, line 0x{2:x}\n",
__arglist(pciPort.Device, interruptEntry.ApicId, interruptEntry.ApicLine));
#endif
//
// And then we need to translate it into a global interrupt number.
//
foreach (Acpi.IoApic ioApic in AcpiTables.GetMadt().GetIoApics())
{
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("Found IoApic 0x{0:x}, interrupt base 0x{1:x}\n",
__arglist(ioApic.Id, ioApic.InterruptBase));
#endif
if (ioApic.Id == interruptEntry.ApicId)
{
resultLine = (byte)(ioApic.InterruptBase + interruptEntry.ApicLine);
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("Using global interrupt line 0x{0:x}\n",
__arglist(resultLine));
#endif
return(resultLine);
}
}
break;
}
}
#if DEBUG_PCI_INTERRUPT_TRANSLATION
DebugStub.Print("HalApic: Translated PCI device 0x{0:x} pin {1} on bus 0x{2:x} to global interrupt 0x{3:x}\n",
__arglist(pciPort.Device, pciInterruptPin, pciPort.Bus, resultLine));
#endif
return(resultLine);
}
