Implement a new physical memory manager and replace DeviceMemory (#856)

* Implement a new physical memory manager and replace DeviceMemory

* Proper generic constraints

* Fix debug build

* Add memory tests

* New CPU memory manager and general code cleanup

* Remove host memory management from CPU project, use Ryujinx.Memory instead

* Fix tests

* Document exceptions on MemoryBlock

* Fix leak on unix memory allocation

* Proper disposal of some objects on tests

* Fix JitCache not being set as initialized

* GetRef without checks for 8-bits and 16-bits CAS

* Add MemoryBlock destructor

* Throw in separate method to improve codegen

* Address PR feedback

* QueryModified improvements

* Fix memory write tracking not marking all pages as modified in some cases

* Simplify MarkRegionAsModified

* Remove XML doc for ghost param

* Add back optimization to avoid useless buffer updates

* Add Ryujinx.Cpu project, move MemoryManager there and remove MemoryBlockWrapper

* Some nits

* Do not perform address translation when size is 0

* Address PR feedback and format NativeInterface class

* Remove ghost parameter description

* Update Ryujinx.Cpu to .NET Core 3.1

* Address PR feedback

* Fix build

* Return a well defined value for GetPhysicalAddress with invalid VA, and do not return unmapped ranges as modified

* Typo

1 files changed, 8 insertions, 4 deletions

diff --git a/Ryujinx.Graphics.Gpu/Memory/Buffer.cs b/Ryujinx.Graphics.Gpu/Memory/Buffer.cs
index e4bc161f..959e1a10 100644
--- a/Ryujinx.Graphics.Gpu/Memory/Buffer.cs
+++ b/Ryujinx.Graphics.Gpu/Memory/Buffer.cs
@@ -30,7 +30,9 @@ namespace Ryujinx.Graphics.Gpu.Memory
         /// </summary>
         public ulong EndAddress => Address + Size;
 
-        private int[] _sequenceNumbers;
+        private readonly (ulong, ulong)[] _modifiedRanges;
+
+        private readonly int[] _sequenceNumbers;
 
         /// <summary>
         /// Creates a new instance of the buffer.
@@ -46,6 +48,8 @@ namespace Ryujinx.Graphics.Gpu.Memory
 
             HostBuffer = context.Renderer.CreateBuffer((int)size);
 
+            _modifiedRanges = new (ulong, ulong)[size / PhysicalMemory.PageSize];
+
             _sequenceNumbers = new int[size / MemoryManager.PageSize];
         }
 
@@ -113,11 +117,11 @@ namespace Ryujinx.Graphics.Gpu.Memory
                 return;
             }
 
-            (ulong, ulong)[] modifiedRanges = _context.PhysicalMemory.GetModifiedRanges(address, size, ResourceName.Buffer);
+            int count = _context.PhysicalMemory.QueryModified(address, size, ResourceName.Buffer, _modifiedRanges);
 
-            for (int index = 0; index < modifiedRanges.Length; index++)
+            for (int index = 0; index < count; index++)
             {
-                (ulong mAddress, ulong mSize) = modifiedRanges[index];
+                (ulong mAddress, ulong mSize) = _modifiedRanges[index];
 
                 int offset = (int)(mAddress - Address);