private void PrepareRegisters()
{
registers = new DoubleWordRegisterCollection(this, new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.PortAData, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (int i = 0; i < bits.Length; i++)
{
if (PortDataDirection[i] == PinDirection.Output)
{
Connections[i].Set(bits[i]);
State[i] = bits[i];
}
}
}, valueProviderCallback: _ => { return(BitHelper.GetValueFromBitsArray(State)); }) },
{ (long)Registers.PortADataDirection, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) => Array.Copy(BitHelper.GetBits(val).Select(x => x ? PinDirection.Output : PinDirection.Input).ToArray(), PortDataDirection, 32),
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(PortDataDirection.Select(x => x == PinDirection.Output))) },
{ (long)Registers.InterruptEnable, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) => {
Array.Copy(BitHelper.GetBits(val), InterruptEnable, 32);
RefreshInterrupts();
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(InterruptEnable)) },
{ (long)Registers.InterruptType, new DoubleWordRegister(this)
// true = edge sensitive; false = level sensitive
.WithValueField(0, 32, out interruptTypeField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptPolarity, new DoubleWordRegister(this)
// true = rising edge / active high; false = falling edge / active low
.WithValueField(0, 32, out interruptPolarityField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptBothEdgeType, new DoubleWordRegister(this)
.WithValueField(0, 32, out interruptBothEdgeField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptMask, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) => {
Array.Copy(BitHelper.GetBits(val), InterruptMask, 32);
RefreshInterrupts();
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(InterruptMask)) },
{ (long)Registers.PortAExternalPort, new DoubleWordRegister(this)
.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(State)) },
{ (long)Registers.ClearInterrupt, new DoubleWordRegister(this)
.WithValueField(0, 32, FieldMode.Write, writeCallback: (_, val) =>
{
foreach (var bit in BitHelper.GetSetBits(val))
{
activeInterrupts[bit] = false;
}
RefreshInterrupts();
}) },
{ (long)Registers.InterruptStatus, new DoubleWordRegister(this)
.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(activeInterrupts.Zip(InterruptMask, (isActive, isMasked) => isActive && !isMasked))) },
{ (long)Registers.RawInterruptStatus, new DoubleWordRegister(this)
.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(activeInterrupts)) }
});
}
public void DosDateTimeToFileTimeTest()
{
var ft = new DateTime(2019, 10, 29, 13, 51, 24, DateTimeKind.Local).ToFileTimeStruct();
Assert.That(FileTimeToDosDateTime(ft, out var fatDate, out var fatTime), ResultIs.Successful);
Assert.That(BitHelper.GetBits(fatDate, 5, 4), Is.EqualTo(10));
Assert.That(DosDateTimeToFileTime(fatDate, fatTime, out var outFt), ResultIs.Successful);
Assert.That(outFt.ToUInt64(), Is.EqualTo(ft.ToUInt64()));
}
private void RefreshConnectionsState()
{
var outputBits = BitHelper.GetBits(outputEnable.Value);
var bits = BitHelper.GetBits(output.Value);
for (var i = 0; i < 32; i++)
{
Connections[i].Set(bits[i] && outputBits[i]);
}
}
private void ActionOnChannels(Action <Channel, bool> action, uint selector)
{
var index = 0;
foreach (var bit in BitHelper.GetBits(selector))
{
action(channels[index], bit);
index++;
}
}
private void CreateRegisters()
{
var regs = new Dictionary <long, DoubleWordRegister>()
{
{ (long)Registers.ExternalInterruptPortSelectLow, new DoubleWordRegister(this)
.WithValueField(0, 32, changeCallback: (oldValue, newValue) => ReroutePort(oldValue, newValue, false), name: "EXTIPSEL") },
{ (long)Registers.ExternalInterruptPortSelectHigh, new DoubleWordRegister(this)
.WithValueField(0, 32, changeCallback: (oldValue, newValue) => ReroutePort(oldValue, newValue, true), name: "EXTIPSEL") },
{ (long)Registers.ExternalInterruptPinSelectLow, new DoubleWordRegister(this, 0x32103210)
.WithValueField(0, 32, changeCallback: (oldValue, newValue) => ReroutePin(oldValue, newValue, false), name: "EXTIPINSEL") },
{ (long)Registers.ExternalInterruptPinSelectHigh, new DoubleWordRegister(this, 0x32103210)
.WithValueField(0, 32, changeCallback: (oldValue, newValue) => ReroutePin(oldValue, newValue, true), name: "EXTIPINSEL") },
{ (long)Registers.ExternalInterruptRisingEdgeTrigger, new DoubleWordRegister(this)
.WithValueField(0, 16, changeCallback: (_, value) => SetEdgeSensitivity(value, InterruptTrigger.RisingEdge)) },
{ (long)Registers.ExternalInterruptFallingEdgeTrigger, new DoubleWordRegister(this)
.WithValueField(0, 16, changeCallback: (_, value) => SetEdgeSensitivity(value, InterruptTrigger.FallingEdge)) },
{ (long)Registers.InterruptFlag, new DoubleWordRegister(this)
.WithValueField(0, 16, FieldMode.Read, valueProviderCallback: (_) => BitHelper.GetValueFromBitsArray(externalInterrupt), name: "EXT")
.WithTag("EM4WU", 16, 16) },
{ (long)Registers.InterruptFlagSet, new DoubleWordRegister(this)
.WithValueField(0, 16, FieldMode.Write, writeCallback: (_, value) => UpdateExternalInterruptBits(value, true), name: "EXT")
.WithTag("EM4WU", 16, 16) },
{ (long)Registers.InterruptFlagClear, new DoubleWordRegister(this)
.WithValueField(0, 16, writeCallback: (_, value) => UpdateExternalInterruptBits(value, false), valueProviderCallback: (_) =>
{
var result = BitHelper.GetValueFromBitsArray(externalInterrupt);
for (var i = 0; i < NumberOfExternalInterrupts; ++i)
{
externalInterrupt[i] = false;
}
UpdateInterrupts();
return(result);
}, name: "EXT")
.WithTag("EM4WU", 16, 16) },
{ (long)Registers.InterruptEnable, new DoubleWordRegister(this)
.WithValueField(0, 16, writeCallback: (_, value) =>
{
Array.Copy(BitHelper.GetBits(value), interruptEnable, NumberOfExternalInterrupts);
UpdateInterrupts();
},
valueProviderCallback: (_) => BitHelper.GetValueFromBitsArray(interruptEnable), name: "EXT")
.WithTag("EM4WU", 16, 16) },
{ (long)Registers.ConfigurationLock, new DoubleWordRegister(this)
.WithValueField(0, 16, writeCallback: (_, value) => configurationLocked = (value != UnlockCode),
valueProviderCallback: (_) => configurationLocked ? 1 : 0u, name: "LOCKKEY") },
};
for (var i = 0; i < NumberOfPorts; ++i)
{
CreatePortRegisters(regs, i);
}
registers = new DoubleWordRegisterCollection(this, regs);
}
public SimplePeripheral(Machine machine) : base(machine)
{
IValueRegisterField value;
Registers.Base.Define(this)
.WithValueField(0, 32, out value, FieldMode.Write);
Registers.Multiplier.Define(this)
.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ => value.Value * 2);
Registers.BitCounter.Define(this)
.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ => (uint)BitHelper.GetBits(value.Value).Where(x => x).Select(x => 1).Sum(x => x));
}
private void MipChanged(uint mip)
{
var previousMip = BitHelper.GetBits(TlibGetMip());
var currentMip = BitHelper.GetBits(mip);
foreach (var gpio in intTypeToVal.Lefts)
{
intTypeToVal.TryGetValue(gpio, out IrqType decodedType);
if (previousMip[(int)decodedType] != currentMip[(int)decodedType])
{
OnGPIO(gpio, currentMip[(int)decodedType]);
}
}
}
private void SetOutputEnableMasked(uint value, bool lower)
{
var offset = lower ? 0 : 16;
var data = BitHelper.GetBits(value & 0xFFFF);
var mask = BitHelper.GetBits(value >> 16);
for (var i = 0; i < 16; ++i)
{
if (mask[i])
{
directOutputEnabled[i + offset] = data[i];
}
}
UpdateConnections();
}
private void SetEdgeSensitivity(uint value, InterruptTrigger trigger)
{
var bits = BitHelper.GetBits(value);
for (var i = 0; i < interruptTriggers.Length; ++i)
{
if (bits[i])
{
interruptTriggers[i] |= trigger;
}
else
{
interruptTriggers[i] ^= trigger;
}
}
}
public SiFive_GPIO(Machine machine) : base(machine, 32)
{
locker = new object();
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.OutputPortValue, new DoubleWordRegister(this)
.WithValueField(0, 32,
valueProviderCallback: _ =>
{
lock (locker)
{
return(BitHelper.GetValueFromBitsArray(Connections.Where(x => x.Key >= 0).OrderBy(x => x.Key).Select(x => x.Value.IsSet)));
}
},
writeCallback: (_, val) =>
{
lock (locker)
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
Connections[i].Set(State[i] || bits[i]);
}
}
}) },
{ (long)Registers.RiseInterruptPending, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) =>
{
lock (locker)
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
if (bits[i])
{
Connections[i].Set(State[i]);
}
}
}
}) }
};
registers = new DoubleWordRegisterCollection(this, registersMap);
}
private void DefineRegisters()
{
// according to LiteX-generated `csr.h` this register is readable
Registers.Leds.Define(this)
.WithValueField(0, LedsCount,
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(Connections.Where(x => x.Key >= 0).OrderBy(x => x.Key).Select(x => x.Value.IsSet)),
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < LedsCount; i++)
{
Connections[i].Set(bits[i]);
}
})
;
Registers.Switches.Define(this)
.WithValueField(0, SwitchesCount, FieldMode.Read,
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(this.State.Skip(LedsCount).Take(SwitchesCount)))
;
Registers.ButtonsStatus.Define(this)
.WithValueField(0, ButtonsCount, FieldMode.Read,
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(this.State.Skip(LedsCount + SwitchesCount).Take(ButtonsCount)))
;
Registers.ButtonsPending.Define(this)
.WithValueField(0, ButtonsCount,
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(buttonsPending),
writeCallback: (_, val) =>
{
foreach (var bit in BitHelper.GetSetBits(val))
{
buttonsPending[bit] = false;
}
UpdateInterrupt();
})
;
Registers.ButtonsEnabled.Define(this)
.WithValueField(0, ButtonsCount, out buttonsEnabled, writeCallback: (_, __) => { UpdateInterrupt(); })
;
}
private int DefineOutRegisters(long offset)
{
var size = 0;
((Registers)offset).Define(this)
.WithValueField(0, NumberOfPins, name: "Out",
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
Connections[i].Set(bits[i]);
}
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(Connections.Where(x => x.Key >= 0).OrderBy(x => x.Key).Select(x => x.Value.IsSet)));
size += 0x4;
return(size);
}
private void AddTargetEnablesRegister(Dictionary <long, DoubleWordRegister> registersMap, long address, uint hartId, PrivilegeLevel level, int numberOfSources)
{
var maximumSourceDoubleWords = (int)Math.Ceiling((numberOfSources + 1) / 32.0) * 4;
for (var offset = 0u; offset < maximumSourceDoubleWords; offset += 4)
{
var lOffset = offset;
registersMap.Add(address + offset, new DoubleWordRegister(this).WithValueField(0, 32, writeCallback: (_, value) =>
{
lock (irqSources)
{
// Each source is represented by one bit. offset and lOffset indicate the offset in double words from TargetXEnables,
// `bit` is the bit number in the given double word,
// and `sourceIdBase + bit` indicate the source number.
var sourceIdBase = lOffset * 8;
var bits = BitHelper.GetBits(value);
for (var bit = 0u; bit < bits.Length; bit++)
{
var sourceNumber = sourceIdBase + bit;
if (sourceNumber == 0)
{
// Source number 0 is not used.
continue;
}
if (irqSources.Length <= sourceNumber)
{
if (bits[bit])
{
this.Log(LogLevel.Noisy, "Trying to enable non-existing source: {0}", sourceNumber);
}
continue;
}
this.Log(LogLevel.Noisy, "{0} source #{1} for hart {2} on level {3}", bits[bit] ? "Enabling" : "Disabling", sourceNumber, hartId, level);
irqTargets[hartId].levels[(int)level].EnableSource(irqSources[sourceNumber], bits[bit]);
}
RefreshInterrupts();
}
}));
}
}
public uint ReadDoubleWord(long offset)
{
lock (locker)
{
if (offset < 0x400)
{
var mask = BitHelper.GetBits((uint)(offset >> 2) & 0xFF);
var bits = BitHelper.GetBits(registers.Read(0));
var result = new bool[8];
for (var i = 0; i < 8; i++)
{
if (mask[i])
{
result[i] = bits[i];
}
}
return(BitHelper.GetValueFromBitsArray(result));
}
return(registers.Read(offset));
}
}
public void WriteDoubleWord(long offset, uint value)
{
lock (locker)
{
if (offset < 0x400)
{
var mask = BitHelper.GetBits((uint)(offset >> 2) & 0xFF);
var bits = BitHelper.GetBits(value);
for (var i = 0; i < 8; i++)
{
if (mask[i])
{
Connections[i].Set(bits[i]);
State[i] = bits[i];
}
}
}
else
{
registers.Write(offset, value);
}
}
}
public PSE_GPIO(Machine machine) : base(machine, 32)
{
locker = new object();
IRQ = new GPIO();
irqManager = new GPIOInterruptManager(IRQ, State);
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.InterruptRegister, new DoubleWordRegister(this)
.WithValueField(0, 32,
writeCallback: (_, val) =>
{
foreach (var i in BitHelper.GetSetBits(val))
{
irqManager.ClearInterrupt(i);
if ((irqManager.PinDirection[i] & GPIOInterruptManager.Direction.Input) != 0)
{
Connections[i].Set(false);
}
}
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(irqManager.ActiveInterrupts), name: "INTR") },
{ (long)Registers.InputRegister, new DoubleWordRegister(this)
.WithValueField(0, 32, out inputReg, FieldMode.Read,
valueProviderCallback: val =>
{
var pins = irqManager.PinDirection.Select(x => (x & GPIOInterruptManager.Direction.Input) != 0);
var result = pins.Zip(State, (pin, state) => pin && state);
return(BitHelper.GetValueFromBitsArray(result));
}, name: "GPIN") },
{ (long)Registers.OutputRegister, new DoubleWordRegister(this)
.WithValueField(0, 32,
valueProviderCallback: val =>
{
var pins = irqManager.PinDirection.Select(x => (x & GPIOInterruptManager.Direction.Output) != 0);
var result = pins.Zip(Connections.Values, (pin, state) => pin && state.IsSet);
return(BitHelper.GetValueFromBitsArray(result));
},
writeCallback: (_, val) =>
{
// Potentially we should raise an exception, as GPIO is bidirectional,
// but we do not have such infrastructure.
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
if ((irqManager.PinDirection[i] & GPIOInterruptManager.Direction.Output) != 0)
{
Connections[i].Set(bits[i]);
}
}
}, name: "GPOUT") },
{ (long)Registers.ClearRegister, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) => SetRegisterBits(val, false), name: "CLEAR_BITS") },
{ (long)Registers.SetRegister, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) => SetRegisterBits(val, true), name: "SET_BITS") },
};
var intTypeToVal = new TwoWayDictionary <GPIOInterruptManager.InterruptTrigger, uint>();
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.ActiveHigh, 0);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.ActiveLow, 1);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.RisingEdge, 2);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.FallingEdge, 3);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.BothEdges, 4);
for (var i = 0; i < RegisterLength; i++)
{
var j = i;
registersMap.Add(i * RegisterOffset, new DoubleWordRegister(this)
.WithFlag(0,
writeCallback: (_, val) =>
{
if (val)
{
irqManager.PinDirection[j] |= GPIOInterruptManager.Direction.Output;
}
else
{
irqManager.PinDirection[j] &= ~GPIOInterruptManager.Direction.Output;
}
},
valueProviderCallback: _ => (irqManager.PinDirection[j] & GPIOInterruptManager.Direction.Output) != 0, name: "OutputRegEnable")
.WithFlag(1,
writeCallback: (_, value) =>
{
if (value)
{
irqManager.PinDirection[j] |= GPIOInterruptManager.Direction.Input;
}
else
{
irqManager.PinDirection[j] &= ~GPIOInterruptManager.Direction.Input;
}
},
valueProviderCallback: _ => (irqManager.PinDirection[j] & GPIOInterruptManager.Direction.Input) != 0, name: "InputRegEnable")
.WithTag("OutputBufferEnable", 2, 1)
.WithFlag(3, writeCallback: (_, v) => { irqManager.InterruptEnable[j] = v; }, valueProviderCallback: _ => irqManager.InterruptEnable[j], name: "InterruptEnable")
.WithReservedBits(4, 1)
.WithValueField(5, 3,
writeCallback: (_, value) =>
{
if (!intTypeToVal.TryGetValue(value, out var type))
{
this.Log(LogLevel.Warning, "Invalid interrupt type for pin #{0}: {1}", j, value);
return;
}
irqManager.InterruptType[j] = type;
},
valueProviderCallback: _ => intTypeToVal[irqManager.InterruptType[j]], name: "InterruptType"));
}
registers = new DoubleWordRegisterCollection(this, registersMap);
}
public Raptor_GPIO(Machine machine) : base(machine, NumberOfPins)
{
locker = new object();
pins = new Pin[NumberOfPins];
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.GPIO_DATA, new DoubleWordRegister(this)
.WithValueField(0, 16,
valueProviderCallback: val =>
{
var readOperations = pins.Select(x => (x.pinOperation & Operation.Read) != 0); // select pins configured as input pins
var result = readOperations.Zip(State, (operation, state) => operation && state); // update with the incoming signals
return(BitHelper.GetValueFromBitsArray(result)); // register value after adjusting the read value for read pins
})
.WithValueField(16, 16,
valueProviderCallback: val =>
{
var writeOperations = pins.Select(x => (x.pinOperation & Operation.Write) != 0); // select pins configured as output pins
var result = writeOperations.Zip(Connections.Values, (operation, state) => operation && state.IsSet); // update with outgoing signals
return(BitHelper.GetValueFromBitsArray(result));
}) },
{ (long)Registers.GPIO_ENB, new DoubleWordRegister(this)
.WithValueField(0, 16,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val); // put the register bits in an array after they are written
for (var i = 0; i < bits.Length; i++)
{
if (bits[i]) // input
{
pins[i].pinOperation = Operation.Read;
}
else // output
{
pins[i].pinOperation = Operation.Write;
}
}
})
.WithTag("RESERVED", 16, 16) },
{ (long)Registers.GPIO_PUB, new DoubleWordRegister(this)
.WithValueField(0, 16,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val); // put the register bits in an array after they are written
for (var i = 0; i < bits.Length; i++)
{
//if(bits[i] == 1) // pullup
// todo: not currently supported
}
})
.WithTag("RESERVED", 16, 16) },
{ (long)Registers.GPIO_PDB, new DoubleWordRegister(this)
.WithValueField(0, 16,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val); // put the register bits in an array after they are written
for (var i = 0; i < bits.Length; i++)
{
//if(bits[i] == 1) // pulldown
// todo: not currently supported
}
})
.WithTag("RESERVED", 16, 16) }
};
registers = new DoubleWordRegisterCollection(this, registersMap);
}
private void CreatePortRegisters(Dictionary <long, DoubleWordRegister> regs, int portNumber)
{
var regOffset = PortOffset * portNumber;
var pinOffset = portNumber * NumberOfPins;
regs.Add((long)Registers.PortAControl + regOffset, new DoubleWordRegister(this, 0x700070)
.WithTag("DRIVESTRENGTH", 0, 1)
.WithTag("SLEWRATE", 4, 3)
.WithTag("DINDIS", 12, 1)
.WithTag("DRIVESTRENGTHALT", 16, 1)
.WithTag("SLEWRATEALT", 20, 3)
.WithTag("DINDISALT", 28, 1)
);
var gpioModeLow = new DoubleWordRegister(this);
var gpioModeHigh = new DoubleWordRegister(this);
for (var pinNumber = 0; pinNumber < 8; ++pinNumber)
{
pinModes[pinOffset + pinNumber] = gpioModeLow.DefineEnumField <PinMode>(pinNumber * 4, 4, name: "MODEX"); //TODO: pin locking
}
for (var pinNumber = 8; pinNumber < 16; ++pinNumber)
{
pinModes[pinOffset + pinNumber] = gpioModeHigh.DefineEnumField <PinMode>((pinNumber - 8) * 4, 4, name: "MODEX"); //TODO: pin locking
}
regs.Add((long)Registers.PortAModeLow + regOffset, gpioModeLow);
regs.Add((long)Registers.PortAModeHigh + regOffset, gpioModeHigh);
regs.Add((long)Registers.PortADataOut + regOffset, new DoubleWordRegister(this)
.WithValueField(0, 16,
writeCallback: (_, newValue) =>
{
var bits = BitHelper.GetBits(newValue);
for (var i = 0; i < 16; i++)
{
var pin = pinOffset + i;
if (IsOutput(pinModes[pin].Value) && unlockedPins[pin].Value)
{
Connections[pin].Set(bits[i]);
}
}
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(Connections.Where(x => x.Key >= 0).OrderBy(x => x.Key).Select(x => x.Value.IsSet))));
regs.Add((long)Registers.PortADataOutToggle + regOffset, new DoubleWordRegister(this)
.WithValueField(0, 16, FieldMode.Write,
writeCallback: (_, newValue) =>
{
var bits = BitHelper.GetSetBits(newValue);
foreach (var bit in bits)
{
var pin = pinOffset + bit;
if (IsOutput(pinModes[pin].Value) && unlockedPins[pin].Value)
{
Connections[pin].Toggle();
}
}
}));
regs.Add((long)Registers.PortADataIn + regOffset, new DoubleWordRegister(this)
.WithValueField(0, 16, FieldMode.Read, valueProviderCallback: (oldValue) => BitHelper.GetValueFromBitsArray(State.Skip(pinOffset).Take(NumberOfPins))));
var unlockedPinsRegister = new DoubleWordRegister(this, 0xFFFF);
for (var pinNumber = 0; pinNumber < NumberOfPins; ++pinNumber)
{
unlockedPins[pinNumber + pinOffset] = unlockedPinsRegister.DefineFlagField(pinNumber, FieldMode.WriteZeroToClear);
}
regs.Add((long)Registers.PortAUnlockedPins + regOffset, unlockedPinsRegister);
}
// pixels
private static Color[] DecodeUncompressedPixelDataToColors(byte[] pixelData, int bpp, int width, int height, bool palette)
{
Color[] pixels;
int pIdx = 0;
switch (bpp)
{
case 32:
{
pixels = new Color[width * height];
if (palette)
{
for (int i = 0; i < pixelData.Length; i += 4)
{
pixels[pIdx++] = Color.FromArgb(BitConverter.ToInt32(pixelData, i));
}
}
else
{
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < width; x++, pIdx += 4)
{
pixels[x + y * width] = Color.FromArgb(BitConverter.ToInt32(pixelData, pIdx));
}
}
}
}
break;
case 24:
{
pixels = new Color[width * height];
if (palette)
{
for (int i = 0; i < pixelData.Length; i += 3)
{
pixels[pIdx++] = Color.FromArgb(pixelData[i + 2], pixelData[i + 1], pixelData[i]);
}
}
else
{
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < width; x++, pIdx += 3)
{
pixels[x + y * width] = Color.FromArgb(pixelData[pIdx + 2], pixelData[pIdx + 1], pixelData[pIdx]);
}
}
}
}
break;
case 16:
{
pixels = new Color[width * height];
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < width; x++, pIdx += 2)
{
ushort color = BitConverter.ToUInt16(pixelData, pIdx);
pixels[x + (height - 1 - y) * width] = Color.FromArgb(
BitHelper.IsBitSet(color, 15) ? 0 : byte.MaxValue, // a
BitHelper.GetBits(color, 5, 0) << 3, // r
BitHelper.GetBits(color, 5, 5) << 3, // g
BitHelper.GetBits(color, 5, 10) << 3); // b
}
}
}
break;
default:
throw new System.NotImplementedException();
}
return(pixels);
}
private void PrepareRegisters()
{
registers = new DoubleWordRegisterCollection(this, new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.Data, new DoubleWordRegister(this)
.WithValueField(0, 8,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (int i = 0; i < 8; i++)
{
if (irqManager.PinDirection[i] == GPIOInterruptManager.Direction.Input)
{
Connections[i].Set(bits[i]);
State[i] = bits[i];
}
}
},
valueProviderCallback: _ => { return(BitHelper.GetValueFromBitsArray(State)); }) },
{ (long)Registers.DataDirection, new DoubleWordRegister(this)
.WithValueField(0, 8, writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < 8; i++)
{
irqManager.PinDirection[i] = bits[i] ? GPIOInterruptManager.Direction.Output : GPIOInterruptManager.Direction.Input;
}
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(irqManager.PinDirection.Select(x => x == GPIOInterruptManager.Direction.Output))) },
{ (long)Registers.InterruptSense, new DoubleWordRegister(this)
.WithValueField(0, 8, out interruptSenseField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptBothEdges, new DoubleWordRegister(this)
.WithValueField(0, 8, out interruptBothEdgeField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptEvent, new DoubleWordRegister(this)
.WithValueField(0, 8, out interruptEventField, writeCallback: (_, val) => CalculateInterruptTypes()) },
{ (long)Registers.InterruptEnable, new DoubleWordRegister(this)
.WithValueField(0, 8, writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < 8; i++)
{
irqManager.InterruptEnable[i] = bits[i];
irqManager.InterruptMask[i] = bits[i];
}
irqManager.RefreshInterrupts();
},
valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(irqManager.InterruptEnable)) },
{ (long)Registers.RawInterruptStatus, new DoubleWordRegister(this)
.WithValueField(0, 8, valueProviderCallback: _ => BitHelper.GetValueFromBitsArray(irqManager.ActiveInterrupts)) },
{ (long)Registers.MaskedInterruptStatus, new DoubleWordRegister(this)
.WithValueField(0, 8, valueProviderCallback: _ => CalculateMaskedInterruptValue()) },
{ (long)Registers.InterruptClear, new DoubleWordRegister(this)
.WithValueField(0, 8, FieldMode.Write, writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < 8; i++)
{
if (bits[i])
{
irqManager.ClearInterrupt(i);
}
}
}) },
{ (long)Registers.ModeControlSelect, new DoubleWordRegister(this)
.WithTag("AFSEL", 0, 32) },
{ (long)Registers.PortEdgeControl, new DoubleWordRegister(this)
.WithTag("P_EDGE_CTRL", 0, 32) },
{ (long)Registers.PowerUpInterruptEnable, new DoubleWordRegister(this)
.WithTag("PI_IEN", 0, 32) },
{ (long)Registers.IOPortsIRQDetectACK, new DoubleWordRegister(this)
.WithTag("IRQ_DETECT_ACK", 0, 32) },
{ (long)Registers.MaskedIRQDetectACK, new DoubleWordRegister(this)
.WithTag("IRQ_DETECT_UNMASK", 0, 32) }
});
}
public MiV_CoreGPIO(Machine machine) : base(machine, NumberOfInterrupts)
{
innerLock = new object();
IRQ = new GPIO();
irqManager = new GPIOInterruptManager(IRQ, State);
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.OutputRegister, new DoubleWordRegister(this).WithValueField(0, 32, FieldMode.Write, writeCallback: (_, value) =>
{
lock (innerLock)
{
var bits = BitHelper.GetBits(value);
for (var i = 0; i < bits.Length; i++)
{
Connections[i].Set(bits[i]);
}
}
}) },
{ (long)Registers.InputRegister, new DoubleWordRegister(this).WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ =>
{
lock (innerLock)
{
return(BitHelper.GetValueFromBitsArray(State));
}
}) },
{ (long)Registers.InterruptClearRegister, new DoubleWordRegister(this).WithValueField(0, 32, writeCallback: (_, value) =>
{
lock (innerLock)
{
foreach (var i in BitHelper.GetSetBits(value))
{
irqManager.ClearInterrupt((uint)i);
}
}
}, valueProviderCallback: _ => {
lock (innerLock)
{
return(BitHelper.GetValueFromBitsArray(irqManager.ActiveInterrupts));
}
}) }
};
var intTypeToVal = new TwoWayDictionary <GPIOInterruptManager.InterruptTrigger, uint>();
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.ActiveHigh, 0);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.ActiveLow, 1);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.RisingEdge, 2);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.FallingEdge, 3);
intTypeToVal.Add(GPIOInterruptManager.InterruptTrigger.BothEdges, 4);
for (var i = 0; i < NumberOfInterrupts; i++)
{
var j = i;
registersMap.Add((long)Registers.ConfigurationRegisterBase + i * 0x4, new DoubleWordRegister(this)
.WithFlag(0, writeCallback: (_, v) =>
{
if (v)
{
irqManager.PinDirection[j] |= GPIOInterruptManager.Direction.Output;
}
else
{
irqManager.PinDirection[j] &= ~GPIOInterruptManager.Direction.Output;
}
},
valueProviderCallback: _ => (irqManager.PinDirection[j] & GPIOInterruptManager.Direction.Output) != 0, name: "OUTREG")
.WithFlag(1, writeCallback: (_, value) =>
{
if (value)
{
irqManager.PinDirection[j] |= GPIOInterruptManager.Direction.Input;
}
else
{
irqManager.PinDirection[j] &= ~GPIOInterruptManager.Direction.Input;
}
},
valueProviderCallback: _ => (irqManager.PinDirection[j] & GPIOInterruptManager.Direction.Input) != 0, name: "INREG")
.WithTag("OUTBUFF", 2, 1)
.WithFlag(3, writeCallback: (_, v) => { irqManager.InterruptEnable[j] = v; }, valueProviderCallback: _ => irqManager.InterruptEnable[j], name: "INTENABLE")
//bit 4 unused
.WithValueField(5, 3, writeCallback: (_, value) =>
{
if (!intTypeToVal.TryGetValue(value, out var type))
{
this.Log(LogLevel.Warning, "Invalid interrupt type for pin #{0}: {1}", j, value);
return;
}
irqManager.InterruptType[j] = type;
}, valueProviderCallback: _ =>
{
if (!intTypeToVal.TryGetValue(irqManager.InterruptType[j], out var value))
{
throw new ArgumentOutOfRangeException($"Unknown interrupt trigger type: {irqManager.InterruptType[j]}");
}
return(value);
}, name: "INTTYPE"));
}
registers = new DoubleWordRegisterCollection(this, registersMap);
}
private void HandleClockRising(bool[] signals)
{
switch (state)
{
case State.Address:
{
this.Log(LogLevel.Noisy, "Appending address bit #{0}: {1}", bufferToDevice.Count, signals[DataSignal]);
bufferToDevice.Push(signals[DataSignal]);
if (bufferToDevice.Count == 7)
{
var address = (int)BitHelper.GetValueFromBitsArray(bufferToDevice.PopAll());
this.Log(LogLevel.Noisy, "Address decoded: 0x{0:X}", address);
state = State.Operation;
if (!TryGetByAddress(address, out slave))
{
this.Log(LogLevel.Warning, "Trying to access a non-existing I2C device at address 0x{0:X}", address);
}
}
break;
}
case State.Operation:
{
isRead = signals[DataSignal];
this.Log(LogLevel.Noisy, "Operation decoded: {0}", isRead ? "read" : "write");
// write ACK(false) or NACK(true)
bufferFromDevice.Enqueue(slave == null);
state = State.AddressAck;
break;
}
case State.AddressAck:
{
if (slave == null)
{
// ignore the rest of transmission until the next (repeated) start condition
state = State.Idle;
}
else if (isRead)
{
this.Log(LogLevel.Noisy, "Reading from device");
foreach (var @byte in slave.Read(6))
{
foreach (var bit in BitHelper.GetBits(@byte).Take(8).Reverse())
{
this.Log(LogLevel.Noisy, "Enqueuing bit: {0}", bit);
bufferFromDevice.Enqueue(bit);
}
}
tickCounter = 0;
state = State.Read;
}
else // it must be write
{
state = State.Write;
}
break;
}
case State.Read:
{
tickCounter++;
if (tickCounter == 8)
{
state = State.ReadAck;
}
break;
}
case State.ReadAck:
{
tickCounter = 0;
state = State.Read;
break;
}
case State.Write:
{
this.Log(LogLevel.Noisy, "Latching data bit #{0}: {1}", bufferToDevice.Count, signals[DataSignal]);
bufferToDevice.Push(signals[DataSignal]);
if (bufferToDevice.Count == 8)
{
state = State.WriteAck;
}
break;
}
case State.WriteAck:
{
DebugHelper.Assert(bufferToDevice.Count == 8);
var dataByte = (byte)BitHelper.GetValueFromBitsArray(bufferToDevice.PopAll());
this.Log(LogLevel.Noisy, "Decoded data byte #{0}: 0x{1:X}", bytesToDevice.Count, dataByte);
bytesToDevice.Enqueue(dataByte);
// ACK
this.Log(LogLevel.Noisy, "Enqueuing ACK");
bufferFromDevice.Enqueue(false);
state = State.Write;
break;
}
}
}
private void UpdateInterrupt()
{
var enabled = BitHelper.GetBits(buttonsEnabled.Value).Take(ButtonsCount);
IRQ.Set(enabled.Zip(buttonsPending, (en, pe) => en && pe).Any());
}
public PlatformLevelInterruptController(Machine machine, int numberOfSources, int numberOfTargets = 1, bool prioritiesEnabled = true)
{
if (numberOfTargets != 1)
{
throw new ConstructionException($"Current {this.GetType().Name} implementation does not support more than one target");
}
// numberOfSources has to fit between these two registers, one bit per source
if (Math.Ceiling((numberOfSources + 1) / 32.0) * 4 > Registers.Target1Enables - Registers.Target0Enables)
{
throw new ConstructionException($"Current {this.GetType().Name} implementation more than {Registers.Target1Enables - Registers.Target0Enables} sources");
}
this.prioritiesEnabled = prioritiesEnabled;
this.machine = machine;
IRQ = new GPIO();
// irqSources are initialized from 1, as the source "0" is not used.
irqSources = new IrqSource[numberOfSources + 1];
for (var i = 1; i <= numberOfSources; i++)
{
irqSources[i] = new IrqSource();
}
activeInterrupts = new Stack <uint>();
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.Target0ClaimComplete, new DoubleWordRegister(this).WithValueField(0, 32, valueProviderCallback: _ =>
{
return(AcknowledgePendingInterrupt());
}, writeCallback: (_, value) =>
{
CompleteHandlingInterrupt(value);
}
) }
};
registersMap.Add((long)Registers.Source0Priority, new DoubleWordRegister(this)
.WithValueField(0, 3, FieldMode.Read,
writeCallback: (_, value) => { if (value != 0)
{
this.Log(LogLevel.Warning, $"Trying to set priority {value} to Source 0, which is illegal");
}
}));
for (var i = 1; i <= numberOfSources; i++)
{
var j = i;
registersMap[(long)Registers.Source1Priority * i] = new DoubleWordRegister(this)
.WithValueField(0, 3,
valueProviderCallback: (_) => irqSources[j].Priority,
writeCallback: (_, value) => { if (prioritiesEnabled)
{
irqSources[j].Priority = value;
}
});
}
var vectorWidth = (uint)Registers.Target1Enables - (uint)Registers.Target0Enables;
var maximumSourceDoubleWords = (int)Math.Ceiling((numberOfSources + 1) / 32.0) * 4;
// When writing to TargetXEnables registers, the user will get an error in log when he tries to write to an
// unused bit of a register that is at least partially used. A warning will be issued on a usual undefined register access otherwise.
for (var target = 0u; target < numberOfTargets; target++)
{
for (var offset = 0u; offset < maximumSourceDoubleWords; offset += 4)
{
var lTarget = target;
var lOffset = offset;
registersMap.Add((long)Registers.Target0Enables + (vectorWidth * target) + offset, new DoubleWordRegister(this).WithValueField(0, 32, writeCallback: (_, value) =>
{
lock (irqSources)
{
// Each source is represented by one bit. offset and lOffset indicate the offset in double words from TargetXEnables,
// `bit` is the bit number in the given double word,
// and `sourceIdBase + bit` indicate the source number.
var sourceIdBase = lOffset * 8;
var bits = BitHelper.GetBits(value);
for (var bit = 0u; bit < bits.Length; bit++)
{
if (sourceIdBase + bit == 0)
{
//Source number 0 is not used.
continue;
}
if (irqSources.Length <= (sourceIdBase + bit))
{
if (bits[bit])
{
this.Log(LogLevel.Error, "Trying to enable non-existing source: {0}", sourceIdBase + bit);
}
continue;
}
var targets = irqSources[sourceIdBase + bit].EnabledTargets;
if (bits[bit])
{
targets.Add(lTarget);
}
else
{
targets.Remove(lTarget);
}
}
RefreshInterrupts();
}
}));
}
}
registers = new DoubleWordRegisterCollection(this, registersMap);
}
public SiFive_GPIO(Machine machine) : base(machine, NumberOfPins)
{
locker = new object();
pins = new Pin[NumberOfPins];
var registersMap = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.PinValue, new DoubleWordRegister(this)
.WithValueField(0, 32,
valueProviderCallback: _ =>
{
var readOperations = pins.Select(x => (x.pinOperation & Operation.Read) != 0);
var result = readOperations.Zip(State, (operation, state) => operation && state);
return(BitHelper.GetValueFromBitsArray(result));
}) },
{ (long)Registers.PinInputEnable, new DoubleWordRegister(this)
.WithValueField(0, 32,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
Misc.FlipFlag(ref pins[i].pinOperation, Operation.Read, bits[i]);
}
}) },
{ (long)Registers.PinOutputEnable, new DoubleWordRegister(this)
.WithValueField(0, 32,
writeCallback: (_, val) =>
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
Misc.FlipFlag(ref pins[i].pinOperation, Operation.Write, bits[i]);
}
}) },
{ (long)Registers.OutputPortValue, new DoubleWordRegister(this)
.WithValueField(0, 32,
writeCallback: (_, val) =>
{
lock (locker)
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
if ((pins[i].pinOperation & Operation.Write) != 0)
{
State[i] = bits[i];
Connections[i].Set(bits[i]);
}
}
}
}) },
{ (long)Registers.RiseInterruptPending, new DoubleWordRegister(this)
.WithValueField(0, 32, writeCallback: (_, val) =>
{
lock (locker)
{
var bits = BitHelper.GetBits(val);
for (var i = 0; i < bits.Length; i++)
{
if (bits[i])
{
Connections[i].Set(State[i]);
}
}
}
}) }
};
registers = new DoubleWordRegisterCollection(this, registersMap);
}