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ryujinx-final/Ryujinx/Cpu/Memory/AMemoryHelper.cs

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2018-02-04 23:08:20 +00:00
using System.IO;
using System.Text;
using System.Threading;
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namespace ChocolArm64.Memory
{
public static class AMemoryHelper
{
public static void FillWithZeros(AMemory Memory, long Position, int Size)
{
int Size8 = Size & ~(8 - 1);
for (int Offs = 0; Offs < Size8; Offs += 8)
{
Memory.WriteInt64(Position + Offs, 0);
}
for (int Offs = Size8; Offs < (Size - Size8); Offs++)
{
Memory.WriteByte(Position + Offs, 0);
}
}
public static int ReadInt32Exclusive(AMemory Memory, long Position)
{
while (!Memory.AcquireAddress(Position))
{
Thread.Yield();
}
int Value = Memory.ReadInt32(Position);
Memory.ReleaseAddress(Position);
return Value;
}
public static void WriteInt32Exclusive(AMemory Memory, long Position, int Value)
{
while (!Memory.AcquireAddress(Position))
{
Thread.Yield();
}
Memory.WriteInt32(Position, Value);
Memory.ReleaseAddress(Position);
}
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public static byte[] ReadBytes(AMemory Memory, long Position, int Size)
{
byte[] Data = new byte[Size];
for (int Offs = 0; Offs < Size; Offs++)
{
Data[Offs] = (byte)Memory.ReadByte(Position + Offs);
}
return Data;
}
public static void WriteBytes(AMemory Memory, long Position, byte[] Data)
{
for (int Offs = 0; Offs < Data.Length; Offs++)
{
Memory.WriteByte(Position + Offs, Data[Offs]);
}
}
public static string ReadAsciiString(AMemory Memory, long Position, int MaxSize = -1)
{
using (MemoryStream MS = new MemoryStream())
{
for (int Offs = 0; Offs < MaxSize || MaxSize == -1; Offs++)
{
byte Value = (byte)Memory.ReadByte(Position + Offs);
if (Value == 0)
{
break;
}
MS.WriteByte(Value);
}
return Encoding.ASCII.GetString(MS.ToArray());
}
}
public static long PageRoundUp(long Value)
{
return (Value + AMemoryMgr.PageMask) & ~AMemoryMgr.PageMask;
}
public static long PageRoundDown(long Value)
{
return Value & ~AMemoryMgr.PageMask;
}
}
}