ryujinx-mirror/Ryujinx/Cpu/Memory/AMemory.cs

234 lines
6.2 KiB
C#
Raw Normal View History

using ChocolArm64.Exceptions;
2018-02-04 23:08:20 +00:00
using ChocolArm64.State;
using System;
using System.Collections.Generic;
namespace ChocolArm64.Memory
{
public unsafe class AMemory
{
private const long ErgMask = (4 << ARegisters.ErgSizeLog2) - 1;
2018-02-04 23:08:20 +00:00
public AMemoryMgr Manager { get; private set; }
private struct ExMonitor
{
public long Position { get; private set; }
private bool ExState;
public ExMonitor(long Position, bool ExState)
{
this.Position = Position;
this.ExState = ExState;
}
public bool HasExclusiveAccess(long Position)
{
return this.Position == Position && ExState;
}
public void Reset()
{
ExState = false;
}
}
private Dictionary<int, ExMonitor> Monitors;
private HashSet<long> ExAddrs;
private byte* RamPtr;
public AMemory(IntPtr Ram, AMemoryAlloc Allocator)
{
Manager = new AMemoryMgr(Allocator);
Monitors = new Dictionary<int, ExMonitor>();
ExAddrs = new HashSet<long>();
RamPtr = (byte*)Ram;
}
public void RemoveMonitor(int ThreadId)
{
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadId, out ExMonitor Monitor))
{
ExAddrs.Remove(Monitor.Position);
}
2018-02-04 23:08:20 +00:00
Monitors.Remove(ThreadId);
}
}
public void SetExclusive(ARegisters Registers, long Position)
{
lock (Monitors)
{
Position &= ~ErgMask;
2018-02-04 23:08:20 +00:00
if (Monitors.TryGetValue(Registers.ThreadId, out ExMonitor Monitor))
2018-02-04 23:08:20 +00:00
{
ExAddrs.Remove(Monitor.Position);
2018-02-04 23:08:20 +00:00
}
bool ExState = ExAddrs.Add(Position);
Monitor = new ExMonitor(Position, ExState);
2018-02-04 23:08:20 +00:00
if (!Monitors.TryAdd(Registers.ThreadId, Monitor))
{
Monitors[Registers.ThreadId] = Monitor;
}
}
}
public bool TestExclusive(ARegisters Registers, long Position)
{
lock (Monitors)
{
Position &= ~ErgMask;
2018-02-04 23:08:20 +00:00
if (!Monitors.TryGetValue(Registers.ThreadId, out ExMonitor Monitor))
{
return false;
}
return Monitor.HasExclusiveAccess(Position);
}
}
public void ClearExclusive(ARegisters Registers)
{
lock (Monitors)
{
if (Monitors.TryGetValue(Registers.ThreadId, out ExMonitor Monitor))
{
Monitor.Reset();
ExAddrs.Remove(Monitor.Position);
}
}
}
public sbyte ReadSByte(long Position) => (sbyte)ReadByte (Position);
public short ReadInt16(long Position) => (short)ReadUInt16(Position);
public int ReadInt32(long Position) => (int)ReadUInt32(Position);
public long ReadInt64(long Position) => (long)ReadUInt64(Position);
public byte ReadByte(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((byte*)(RamPtr + (uint)Position));
2018-02-04 23:08:20 +00:00
}
public ushort ReadUInt16(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((ushort*)(RamPtr + (uint)Position));
2018-02-04 23:08:20 +00:00
}
public uint ReadUInt32(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((uint*)(RamPtr + (uint)Position));
2018-02-04 23:08:20 +00:00
}
public ulong ReadUInt64(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((ulong*)(RamPtr + (uint)Position));
2018-02-04 23:08:20 +00:00
}
public AVec ReadVector128(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
2018-02-04 23:08:20 +00:00
return new AVec()
{
X0 = ReadUInt64(Position + 0),
X1 = ReadUInt64(Position + 8)
};
}
public void WriteSByte(long Position, sbyte Value) => WriteByte (Position, (byte)Value);
public void WriteInt16(long Position, short Value) => WriteUInt16(Position, (ushort)Value);
public void WriteInt32(long Position, int Value) => WriteUInt32(Position, (uint)Value);
public void WriteInt64(long Position, long Value) => WriteUInt64(Position, (ulong)Value);
public void WriteByte(long Position, byte Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((byte*)(RamPtr + (uint)Position)) = Value;
2018-02-04 23:08:20 +00:00
}
public void WriteUInt16(long Position, ushort Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((ushort*)(RamPtr + (uint)Position)) = Value;
2018-02-04 23:08:20 +00:00
}
public void WriteUInt32(long Position, uint Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((uint*)(RamPtr + (uint)Position)) = Value;
2018-02-04 23:08:20 +00:00
}
public void WriteUInt64(long Position, ulong Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((ulong*)(RamPtr + (uint)Position)) = Value;
2018-02-04 23:08:20 +00:00
}
public void WriteVector128(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
2018-02-04 23:08:20 +00:00
WriteUInt64(Position + 0, Value.X0);
WriteUInt64(Position + 8, Value.X1);
}
private void EnsureAccessIsValid(long Position, AMemoryPerm Perm)
2018-02-04 23:08:20 +00:00
{
if (!Manager.IsMapped(Position))
{
throw new VmmPageFaultException(Position);
}
if (!Manager.HasPermission(Position, Perm))
{
throw new VmmAccessViolationException(Position, Perm);
}
2018-02-04 23:08:20 +00:00
}
}
}