public static byte TranslatePciInterrupt(byte currentInterruptLine,
byte pciInterruptPin,
PciPort pciPort)
{
return(thePlatform.devices.TranslatePciInterrupt(currentInterruptLine,
pciInterruptPin,
pciPort));
}
public override byte TranslatePciInterrupt(byte currentInterruptLine,
byte pciInterruptPin,
PciPort pciPort)
{
//
// On a non-ACPI PC, there's nothing to translate;
// just return the current interrupt line.
//
return(currentInterruptLine);
}
bool Write32(PciPortHandle handle, int offset, uint value)
{
if (handle.id != UIntPtr.Zero)
{
PciPort p = HandleTable.GetHandle(handle.id) as PciPort;
p.Write32(offset, value);
return(true);
}
else
{
return(false);
}
}
bool Read16Impl(PciPortHandle handle, int offset, ushort *value)
{
if (handle.id != UIntPtr.Zero)
{
PciPort p = HandleTable.GetHandle(handle.id) as PciPort;
* value = p.Read16(offset);
return(true);
}
else
{
*value = 0;
return(false);
}
}
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);
}
public abstract byte TranslatePciInterrupt(byte currentInterruptLine,
byte pciInterruptPin,
PciPort pciPort);
