private Packet MakePacketFromDescriptor(DmaMemory mem, ulong controlBits)
{
PacketFifo inDevPkts = rxPacketsInDevice.Acquire();
Packet packet = inDevPkts.Pop();
int length = (int)((controlBits & RxDescriptor.LENGTH_MASK)
>> RxDescriptor.LENGTH_SHIFT);
uint stat_err = (uint)((controlBits & RxDescriptor.ERR_STAT_MASK)
>> RxDescriptor.ERR_STAT_SHIFT);
// can't deal with fragments yet
if ((stat_err & RxErrStatFields.END_OF_PACKET) == 0)
{
INucleusCalls.DebugPrintHex(40, 0xd0);
DebugStub.Print("FRAGMENT\n");
throw new Exception();
}
//DebugStub.Assert((stat_err & RxErrStatFields.END_OF_PACKET) != 0);
//DebugStub.Assert(packet.GetFragmentVirtualAddress(0) == fragmentVirtAddr);
packet.FromDeviceFlags = GetRecvPktFlags(stat_err);
packet.SetFragment(0, mem.BytesRef(0, length));
rxPacketsInDevice.Release(inDevPkts);
return(packet);
}
private Packet MakePacketFromDescriptor(ulong controlBits)
{
PacketFifo inDevPkts = txPacketsInDevice.Acquire();
Packet packet = inDevPkts.Pop();
// int length = (int) ((controlBits & TxDescriptor.LENGTH_MASK)
// >> TxDescriptor.LENGTH_SHIFT);
int stat_err = (int)((controlBits & TxDescriptor.ERR_STAT_MASK)
>> TxDescriptor.ERR_STAT_SHIFT);
//DebugStub.Assert(packet.GetFragmentVirtualAddress(0) == fragmentVirtAddr);
if (((TxStatErrFields.LATE_COLLISION |
TxStatErrFields.EXCESS_COLLISIONS |
TxStatErrFields.TRANSMIT_UNDERRUN) & stat_err) == 0)
{
packet.FromDeviceFlags = FromDeviceFlags.TransmitSuccess;
}
else
{
packet.FromDeviceFlags = FromDeviceFlags.TransmitError;
}
txPacketsInDevice.Release(inDevPkts);
return(packet);
}
