/// <summary>
/// Read method for filesystem
/// </summary>
/// <param name="node">The node</param>
/// <param name="offset">The offset</param>
/// <param name="size">The size</param>
/// <param name="buffer">The buffer</param>
/// <returns>The amount of bytes read</returns>
private static unsafe uint readImpl(Node node, uint offset, uint size, byte[] buffer)
{
// Only support sizes in magnitudes of 512
if (size % 512 != 0)
{
return(0);
}
uint sz = size / 512;
AHCICookie cookie = (AHCICookie)node.Cookie;
byte *bufferPtr = (byte *)Util.ObjectToVoidPtr(buffer);
if (cookie.AHCI.AtaTransfer(cookie.PortInfo, (int)offset, (int)sz, (byte *)Util.ObjectToVoidPtr(buffer), false) == 0)
{
return(0);
}
return((uint)size);
}
/// <summary>
/// Initalize port
/// </summary>
/// <param name="portInfo">Port info</param>
private void initPort(AHCIPortInfo portInfo)
{
AHCI_Port_registers *portReg = mPorts + portInfo.PortNumber;
portInfo.CommandHeader = (AHCI_Command_header *)Heap.AlignedAlloc(4048, sizeof(AHCI_Command_header) * NUM_CMD_HEADERS);
Memory.Memset(portInfo.CommandHeader, 0xFF, sizeof(AHCI_Command_header) * NUM_CMD_HEADERS);
portInfo.Type = GetPortType(portReg);
// Port found?
if (portInfo.Type == AHCI_PORT_TYPE.NO)
{
return;
}
// NOTE: We support only SATA for now..
if (portInfo.Type != AHCI_PORT_TYPE.SATA)
{
switch (portInfo.Type)
{
case AHCI_PORT_TYPE.PM:
Console.Write("[AHCI] Unsupported type PM found on port ");
Console.WriteNum(portInfo.PortNumber);
Console.WriteLine("");
break;
case AHCI_PORT_TYPE.SATAPI:
Console.Write("[AHCI] Unsupported type SATAPI found on port ");
Console.WriteNum(portInfo.PortNumber);
Console.WriteLine("");
break;
case AHCI_PORT_TYPE.SEMB:
Console.Write("[AHCI] Unsupported type SEMB found on port ");
Console.WriteNum(portInfo.PortNumber);
Console.WriteLine("");
break;
}
return;
}
stopPort(portReg);
AHCI_Received_FIS *Fises = (AHCI_Received_FIS *)Heap.AlignedAlloc(256, sizeof(AHCI_Received_FIS));
Memory.Memclear(Fises, sizeof(AHCI_Received_FIS));
portReg->CLB = (uint)Paging.GetPhysicalFromVirtual(portInfo.CommandHeader);
portReg->CLBU = 0x00;
portReg->FB = (uint)Paging.GetPhysicalFromVirtual(Fises);
portReg->FBU = 0x00;
AHCI_Command_table_entry *cmdTable = (AHCI_Command_table_entry *)Heap.AlignedAlloc(128, sizeof(AHCI_Command_table_entry));
Memory.Memclear(cmdTable, sizeof(AHCI_Command_table_entry));
for (int i = 0; i < NUM_CMD_HEADERS; i++)
{
portInfo.CommandHeader[i].Prdtl = 0;
portInfo.CommandHeader[i].CTBA = (uint)cmdTable;
portInfo.CommandHeader[i].CTBAU = 0x00;
}
startPort(portReg);
portInfo.PortRegisters = portReg;
char *name = (char *)Heap.Alloc(5);
name[0] = 'H';
name[1] = 'D';
name[2] = 'A';
name[3] = (char)('0' + portInfo.PortNumber);
name[4] = '\0';
string nameStr = Util.CharPtrToString(name);
Node node = new Node();
node.Read = readImpl;
//node.Write = writeImpl;
AHCICookie cookie = new AHCICookie();
cookie.AHCI = this;
cookie.PortInfo = portInfo;
node.Cookie = cookie;
Disk.InitalizeNode(node, nameStr);
RootPoint dev = new RootPoint(nameStr, node);
VFS.MountPointDevFS.AddEntry(dev);
}