private ushort PrepareAccess(PciDevice d, ushort pos)
{
if (pos >= 256)
{
throw new ArgumentOutOfRangeException(nameof(pos));
}
var code = GetConfigAddress(d.Bus, d.Dev, d.Func, pos);
DirectIo.Write(code, 0xcf8);
var addr = (ushort)(0xcfc + (ushort)(pos & 3));
return(addr);
}
public bool Detect()
{
if (!DirectIo.Startup())
{
return(false);
}
DirectIo.Write(1, 0xCFB);
var tmp = DirectIo.ReadUInt32(0xCF8);
DirectIo.Write(0x80000000, 0xCF8);
var result = DirectIo.ReadUInt32(0xCF8) == 0x80000000;
DirectIo.Write(tmp, 0xCF8);
return(result && Check());
}
public void Write(PciDevice device, ushort offset, uint value)
{
var ptr = PrepareAccess(device, offset);
DirectIo.Write(value, ptr);
}
public byte ReadByte(PciDevice device, ushort offset)
{
var ptr = PrepareAccess(device, offset);
return(DirectIo.ReadByte(ptr));
}
public ushort ReadUint16(PciDevice device, ushort offset)
{
var ptr = PrepareAccess(device, offset);
return(DirectIo.ReadUInt16(ptr));
}
