betrusted-renode/ticktimer-soc.cs
Sean Cross fe96ef185b minor renaming of stuff
Signed-off-by: Sean Cross <sean@xobs.io>
2019-11-26 07:56:13 +08:00

83 lines
2.2 KiB
C#

//
// Copyright (c) 2010-2018 Antmicro
// Copyright (c) 2011-2015 Realtime Embedded
//
// This file is licensed under the MIT License.
// Full license text is available in 'licenses/MIT.txt'.
//
using System;
using Antmicro.Renode.Core;
using Antmicro.Renode.Peripherals.Bus;
using Antmicro.Renode.Time;
using Antmicro.Renode.Logging;
using System.Threading;
namespace Antmicro.Renode.Peripherals.Timers
{
public class BSOCTickTimer : IDoubleWordPeripheral, IKnownSize
{
public BSOCTickTimer(ulong periodInMs, Machine machine)
{
running = true;
machine.ClockSource.AddClockEntry(new ClockEntry(periodInMs, ClockEntry.FrequencyToRatio(this, 1000), OnTick, this, String.Empty));
}
public long Size
{
get
{
return 0x400;
}
}
public virtual uint ReadDoubleWord(long offset)
{
if (offset == 0)
return 0;
else if (offset == 4)
offset = 40;
else if (offset == 8)
offset = 32;
else if (offset == 12)
offset = 24;
else if (offset == 16)
offset = 16;
else if (offset == 20)
offset = 8;
else if (offset == 24)
offset = 0;
else {
this.LogUnhandledRead(offset);
return 0;
}
return (uint)(Interlocked.CompareExchange(ref counter, 0, 0) >> (int)offset);
}
public virtual void WriteDoubleWord(long offset, uint value)
{
if (offset == 0) {
if ((value & 1) == 1)
Interlocked.Exchange(ref counter, 0);
running = ((value & 2) != 2);
return;
}
this.LogUnhandledWrite(offset, value);
}
public virtual void Reset()
{
Interlocked.Exchange(ref counter, 0);
}
private void OnTick()
{
if (running)
Interlocked.Increment(ref counter);
}
private long counter;
private bool running;
}
}