betrusted-renode/fb.cs

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3.0 KiB
C#
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//
// Copyright (c) 2010 - 2019 Antmicro
//
// This file is licensed under the MIT License.
// Full license text is available in 'licenses/MIT.txt'.
//
using System;
using System.Linq;
using Antmicro.Renode.Backends.Display;
using Antmicro.Renode.Core;
using Antmicro.Renode.Core.Structure.Registers;
using Antmicro.Renode.Logging;
using Antmicro.Renode.Peripherals.Bus;
using Antmicro.Renode.Peripherals.Memory;
using Antmicro.Renode.Utilities;
namespace Antmicro.Renode.Peripherals.Video
{
public class fb : AutoRepaintingVideo, IDoubleWordPeripheral, IProvidesRegisterCollection<DoubleWordRegisterCollection>, IKnownSize
{
public fb(Machine machine) : base(machine)
{
this.machine = machine;
RegistersCollection = new DoubleWordRegisterCollection(this);
Reconfigure(336, 536, PixelFormat.RGB565, false);
for (int i = 0; i < buffer.Length; i++) buffer[i] = 0;
DoRepaint();
DefineRegisters();
Reset();
}
public void WriteDoubleWord(long address, uint value)
{
RegistersCollection.Write(address, value);
}
public uint ReadDoubleWord(long offset)
{
return RegistersCollection.Read(offset);
}
public override void Reset()
{
RegistersCollection.Reset();
}
public long Size { get{ return 0x800; }}
public DoubleWordRegisterCollection RegistersCollection { get; private set; }
protected override void Repaint()
{
var newbuf = new Byte[44*Height];
machine.SystemBus.ReadBytes(bufferAddress, newbuf.Length, newbuf, 0);
for (int y = 0; y < Height; y++) {
if (!updateDirty || updateAll || ((newbuf[y*44+0x2a] & 0x1) == 0x1)) for (int x = 0; x < Width; x++) {
if (((newbuf[((x+y*44*8))/8] >> (x%8))&1) > 0) {
buffer[2*(x+y*Width)] = 0xFF;
buffer[2*(x+y*Width)+1] = 0xFF;
} else {
buffer[2*(x+y*Width)] = 0x0;
buffer[2*(x+y*Width)+1] = 0x0;
}
}
}
}
private void DefineRegisters()
{
Registers.COMMAND.Define(this)
.WithValueField(0, 32, writeCallback: (_, val) =>
{
updateDirty = (val & 0x1) == 0x1;
updateAll = (val & 0x2) == 0x2;
DoRepaint();
})
;
Registers.BUSY.Define(this)
.WithValueField(0, 32, valueProviderCallback: _ => { return 0; })
;
}
private bool updateDirty = false;
private bool updateAll = false;
private uint bufferAddress = 0xB0000000;
private readonly Machine machine;
private enum Registers
{
COMMAND = 0x0,
BUSY = 0x04
}
}
}