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

2 files changed, 61 insertions, 0 deletions

diff --git a/Ryujinx.Memory.Tests/Ryujinx.Memory.Tests.csproj b/Ryujinx.Memory.Tests/Ryujinx.Memory.Tests.csproj
new file mode 100644
index 00000000..bc916ea2
--- /dev/null
+++ b/Ryujinx.Memory.Tests/Ryujinx.Memory.Tests.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nunit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Ryujinx.Memory\Ryujinx.Memory.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/Ryujinx.Memory.Tests/Tests.cs b/Ryujinx.Memory.Tests/Tests.cs
new file mode 100644
index 00000000..0f5fcaf5
--- /dev/null
+++ b/Ryujinx.Memory.Tests/Tests.cs
@@ -0,0 +1,42 @@
+using NUnit.Framework;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Memory.Tests
+{
+    public class Tests
+    {
+        private const ulong MemorySize = 0x8000;
+
+        private MemoryBlock _memoryBlock;
+
+        [SetUp]
+        public void Setup()
+        {
+            _memoryBlock = new MemoryBlock(MemorySize);
+        }
+
+        [TearDown]
+        public void Teardown()
+        {
+            _memoryBlock.Dispose();
+        }
+
+        [Test]
+        public void Test_Read()
+        {
+            Marshal.WriteInt32(_memoryBlock.Pointer, 0x2020, 0x1234abcd);
+
+            Assert.AreEqual(_memoryBlock.Read<int>(0x2020), 0x1234abcd);
+        }
+
+        [Test]
+        public void Test_Write()
+        {
+            _memoryBlock.Write(0x2040, 0xbadc0de);
+
+            Assert.AreEqual(Marshal.ReadInt32(_memoryBlock.Pointer, 0x2040), 0xbadc0de);
+        }
+    }
+}
\ No newline at end of file