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Split main project into core,graphics and chocolarm4 subproject (#29)

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emmauss 2018-02-20 22:09:23 +02:00 • committed by gdkchan
parent cb665bb715
commit 62b827f474
257 changed files with 415 additions and 285 deletions
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204
Ryujinx.Graphics/Gpu/NsGpuMemoryMgr.cs Normal file
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namespace Ryujinx.Graphics.Gpu
{
class NsGpuMemoryMgr
{
private const long AddrSize = 1L << 40;
private const int PTLvl0Bits = 14;
private const int PTLvl1Bits = 14;
private const int PTPageBits = 12;
private const int PTLvl0Size = 1 << PTLvl0Bits;
private const int PTLvl1Size = 1 << PTLvl1Bits;
private const int PageSize = 1 << PTPageBits;
private const int PTLvl0Mask = PTLvl0Size - 1;
private const int PTLvl1Mask = PTLvl1Size - 1;
private const int PageMask = PageSize - 1;
private const int PTLvl0Bit = PTPageBits + PTLvl0Bits;
private const int PTLvl1Bit = PTPageBits;
private const long PteUnmapped = -1;
private const long PteReserved = -2;
private long[][] PageTable;
public NsGpuMemoryMgr()
{
PageTable = new long[PTLvl0Size][];
}
public long Map(long CpuAddr, long GpuAddr, long Size)
{
CpuAddr &= ~PageMask;
GpuAddr &= ~PageMask;
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
if (GetPTAddr(GpuAddr + Offset) != PteReserved)
{
return Map(CpuAddr, Size);
}
}
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
SetPTAddr(GpuAddr + Offset, CpuAddr + Offset);
}
return GpuAddr;
}
public long Map(long CpuAddr, long Size)
{
CpuAddr &= ~PageMask;
long Position = GetFreePosition(Size);
if (Position != -1)
{
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
SetPTAddr(Position + Offset, CpuAddr + Offset);
}
}
return Position;
}
public long Reserve(long GpuAddr, long Size, long Align)
{
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
if (HasPTAddr(GpuAddr + Offset))
{
return Reserve(Size, Align);
}
}
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
SetPTAddr(GpuAddr + Offset, PteReserved);
}
return GpuAddr;
}
public long Reserve(long Size, long Align)
{
long Position = GetFreePosition(Size, Align);
if (Position != -1)
{
for (long Offset = 0; Offset < Size; Offset += PageSize)
{
SetPTAddr(Position + Offset, PteReserved);
}
}
return Position;
}
private long GetFreePosition(long Size, long Align = 1)
{
long Position = 0;
long FreeSize = 0;
if (Align < 1)
{
Align = 1;
}
Align = (Align + PageMask) & ~PageMask;
while (Position + FreeSize < AddrSize)
{
if (!HasPTAddr(Position + FreeSize))
{
FreeSize += PageSize;
if (FreeSize >= Size)
{
return Position;
}
}
else
{
Position += FreeSize + PageSize;
FreeSize = 0;
long Remainder = Position % Align;
if (Remainder != 0)
{
Position = (Position - Remainder) + Align;
}
}
}
return -1;
}
public long GetCpuAddr(long Position)
{
long BasePos = GetPTAddr(Position);
if (BasePos < 0)
{
return -1;
}
return BasePos + (Position & PageMask);
}
private bool HasPTAddr(long Position)
{
if (Position >> PTLvl0Bits + PTLvl1Bits + PTPageBits != 0)
{
return false;
}
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
return false;
}
return PageTable[L0][L1] != PteUnmapped;
}
private long GetPTAddr(long Position)
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
return -1;
}
return PageTable[L0][L1];
}
private void SetPTAddr(long Position, long TgtAddr)
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
PageTable[L0] = new long[PTLvl1Size];
for (int Index = 0; Index < PTLvl1Size; Index++)
{
PageTable[L0][Index] = PteUnmapped;
}
}
PageTable[L0][L1] = TgtAddr;
}
}
}