public void SetHeapSize(int Size, int Type)
{
//TODO: Return error when theres no enough space to allocate heap.
Size = (int)AMemoryHelper.PageRoundUp(Size);
long Position = HeapAddr;
if ((ulong)Size < (ulong)HeapSize)
{
//Try to free now free area if size is smaller than old size.
Position += Size;
while ((ulong)Size < (ulong)HeapSize)
{
Allocator.Free(GetPhys(Position, AMemoryPerm.None));
Position += PageSize;
}
}
else
{
//Allocate extra needed size.
Position += HeapSize;
Size -= HeapSize;
MapPhys(Position, Size, Type, AMemoryPerm.RW);
}
HeapSize = Size;
}
public long Alloc(long Size)
{
long Position = PhysPos;
Size = AMemoryHelper.PageRoundUp(Size);
PhysPos += Size;
if (PhysPos > AMemoryMgr.RamSize || PhysPos < 0)
{
throw new VmmOutOfMemoryException(Size);
}
return(Position);
}
public void Reprotect(long Position, long Size, AMemoryPerm Perm)
{
Position = AMemoryHelper.PageRoundDown(Position);
Size = AMemoryHelper.PageRoundUp(Size);
long PagesCount = Size / PageSize;
while (PagesCount-- > 0)
{
PTEntry Entry = GetPTEntry(Position);
Entry.Perm = Perm;
SetPTEntry(Position, Entry);
Position += PageSize;
}
}
public void MapMirror(long Src, long Dst, long Size, int Type)
{
Src = AMemoryHelper.PageRoundDown(Src);
Dst = AMemoryHelper.PageRoundDown(Dst);
Size = AMemoryHelper.PageRoundUp(Size);
long PagesCount = Size / PageSize;
while (PagesCount-- > 0)
{
PTEntry Entry = GetPTEntry(Src);
Entry.Type = Type;
Entry.Map = PTMap.Mirror;
Entry.Position = Dst;
SetPTEntry(Src, Entry);
Src += PageSize;
Dst += PageSize;
}
}
public bool MapPhys(long Src, long Dst, long Size, int Type, AMemoryPerm Perm)
{
Src = AMemoryHelper.PageRoundDown(Src);
Dst = AMemoryHelper.PageRoundDown(Dst);
Size = AMemoryHelper.PageRoundUp(Size);
if (Dst < 0 || Dst + Size >= RamSize)
{
return(false);
}
long PagesCount = Size / PageSize;
while (PagesCount-- > 0)
{
SetPTEntry(Src, new PTEntry(Dst, Type, PTMap.Physical, Perm));
Src += PageSize;
Dst += PageSize;
}
return(true);
}
