public SunxiDMADescriptor(uint address, DmaEngine dmaEngine)
{
Address = address;
byte[] descriptorData = new byte[16];
Request getDescriptorData = new Request((long)Address, new Place(descriptorData, 0), 16,
TransferType.DoubleWord, TransferType.DoubleWord);
dmaEngine.IssueCopy(getDescriptorData);
Status = BitConverter.ToUInt32(descriptorData, 0);
BufferSize = BitConverter.ToUInt32(descriptorData, 4);
BufferAddress = BitConverter.ToUInt32(descriptorData, 8);
NextDescriptor = BitConverter.ToUInt32(descriptorData, 12);
if (BufferSize == 0) // the driver assumes 0-sized blocks to be 64kB, which is inconsistent with the Allwinner user manual.
{
BufferSize = 0x10000;
}
}
public SunxiMMC(Machine machine) : base(machine)
{
SetupRegisters();
IRQ = new GPIO();
dmaEngine = new DmaEngine(machine);
}
