internal static MpBusEntry Parse(IoMemory region,
int length,
ref int offset)
{
Debug.Assert(length >= offset + Length);
Debug.Assert(region.Read8(offset + 0) == EntryType);
MpBusEntry e = new MpBusEntry();
e.BusId = region.Read8(offset + 1);
e.BusType = BusType.UNKNOWN;
string name = region.ReadAsciiZeroString(offset + 2, 6);
e.BusType = BusType.UNKNOWN;
for (int i = 0; i <= (int)BusType.LAST; i++)
{
if (name == busNames[i])
{
e.BusType = (BusType)i;
break;
}
}
e.DebugPrint();
offset += Length;
return(e);
}
private void InitializeMpResourceEntries()
{
if (MpResources.FloatingPointer != null)
{
DebugStub.Print("Initializing Apic redirections from MpResources\n");
foreach (MpInterruptEntry e in MpResources.IoInterruptEntries)
{
IoApic ioApic = GetIoApic(e.ApicId);
if (ioApic == null)
{
DebugStub.Print("Could not find I/O Apic with id {0}\n",
__arglist(e.ApicId));
continue;
}
MpBusEntry be = MpResources.GetBusEntryById(e.BusId);
if (be == null)
{
DebugStub.Print("Unknown bus device id {0:x2}\n",
__arglist(e.BusId));
continue;
}
if (be.BusType == BusType.ISA)
{
ConfigureIsaInterrupt(ioApic, e);
}
else if (be.BusType == BusType.PCI)
{
ConfigurePciInterrupt(ioApic, e);
}
else
{
DebugStub.Print("Unhandled device on bus {0:x2}\n",
__arglist(e.BusId));
continue;
}
}
}
else
{
DebugStub.Print("Initializing Apic redirections to defaults\n");
// If there are no MP tables, set up a standard mapping for the IRQs on CPU 0
uint end = 16;
IoBits stdBits = (IoBits.DstPhysical | IoBits.DelModFixed |
IoBits.IrqMask | IoBits.IntPolActiveLow |
IoBits.TriggerModeEdge);
for (uint z = 0; z < end; z++)
{
RedirectionEntry re = new RedirectionEntry(this.Id, stdBits, IrqToInterrupt((byte)z));
ioApics[0].SetRedirectionEntry((byte)z, ref re);
}
}
PrintIoApics();
}
internal static void Parse(IoMemory region,
int length,
uint entryCount)
{
int offset = 0;
for (int i = 0; i < entryCount; i++)
{
switch (region.Read8(offset))
{
case MpProcessorEntry.EntryType:
ProcessorEntries.Add(
MpProcessorEntry.Parse(region, length, ref offset)
);
break;
case MpBusEntry.EntryType:
BusEntries.Add(
MpBusEntry.Parse(region, length, ref offset)
);
break;
case MpIoApicEntry.EntryType:
IoApicEntries.Add(
MpIoApicEntry.Parse(region, length, ref offset)
);
break;
case MpInterruptEntry.IoEntryType:
IoInterruptEntries.Add(
MpInterruptEntry.Parse(region, length, ref offset)
);
break;
case MpInterruptEntry.LocalEntryType:
LocalInterruptEntries.Add(
MpInterruptEntry.Parse(region, length, ref offset)
);
break;
}
}
}