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

1 files changed, 4 insertions, 20 deletions

diff --git a/ChocolArm64/Memory/AMemoryHelper.cs b/ChocolArm64/Memory/AMemoryHelper.cs
index 0a23a2f8..ea877834 100644
--- a/ChocolArm64/Memory/AMemoryHelper.cs
+++ b/ChocolArm64/Memory/AMemoryHelper.cs
@@ -26,12 +26,9 @@ namespace ChocolArm64.Memory
         {
             long Size = Marshal.SizeOf<T>();
 
-            if ((ulong)(Position + Size) > AMemoryMgr.AddrSize)
-            {
-                throw new ArgumentOutOfRangeException(nameof(Position));
-            }
+            Memory.EnsureRangeIsValid(Position, Size);
 
-            IntPtr Ptr = new IntPtr((byte*)Memory.Ram + Position);
+            IntPtr Ptr = (IntPtr)Memory.Translate(Position);
 
             return Marshal.PtrToStructure<T>(Ptr);
         }
@@ -40,12 +37,9 @@ namespace ChocolArm64.Memory
         {
             long Size = Marshal.SizeOf<T>();
 
-            if ((ulong)(Position + Size) > AMemoryMgr.AddrSize)
-            {
-                throw new ArgumentOutOfRangeException(nameof(Position));
-            }
+            Memory.EnsureRangeIsValid(Position, Size);
 
-            IntPtr Ptr = new IntPtr((byte*)Memory.Ram + Position);
+            IntPtr Ptr = (IntPtr)Memory.TranslateWrite(Position);
 
             Marshal.StructureToPtr<T>(Value, Ptr, false);
         }
@@ -69,15 +63,5 @@ namespace ChocolArm64.Memory
                 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;
-        }
     }
 }
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