More flexible memory manager (#307)

* Keep track mapped buffers with fixed offsets

* Started rewriting the memory manager

* Initial support for MapPhysicalMemory and UnmapPhysicalMemory, other tweaks

* MapPhysicalMemory/UnmapPhysicalMemory support, other tweaks

* Rebased

* Optimize the map/unmap physical memory svcs

* Integrate shared font support

* Fix address space reserve alignment

* Some fixes related to gpu memory mapping

* Some cleanup

* Only try uploading const buffers that are really used

* Check if memory region is contiguous

* Rebased

* Add missing count increment on IsRegionModified

* Check for reads/writes outside of the address space, optimize translation with a tail call

Ryujinx.HLE/OsHle/Handles/MemoryAttribute.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace Ryujinx.HLE.OsHle.Handles
+{
+    [Flags]
+    enum MemoryAttribute  : byte
+    {
+        None = 0,
+        Mask = 0xff,
+
+        Borrowed     = 1 << 0,
+        IpcMapped    = 1 << 1,
+        DeviceMapped = 1 << 2,
+        Uncached     = 1 << 3,
+
+        IpcAndDeviceMapped = IpcMapped | DeviceMapped,
+
+        BorrowedAndIpcMapped = Borrowed | IpcMapped,
+
+        DeviceMappedAndUncached = DeviceMapped | Uncached
+    }
+}