Optimize address translation and write tracking on the MMU (#571)

* Implement faster address translation and write tracking on the MMU

* Rename MemoryAlloc to MemoryManagement, and other nits

* Support multi-level page tables

* Fix typo

* Reword comment a bit

* Support scalar vector loads/stores on the memory fast path, and minor fixes

* Add missing cast

* Alignment

* Fix VirtualFree function signature

* Change MemoryProtection enum to uint aswell for consistency

1 files changed, 0 insertions, 114 deletions

diff --git a/ChocolArm64/Memory/MemoryAlloc.cs b/ChocolArm64/Memory/MemoryAlloc.cs
deleted file mode 100644
index a24299cd..00000000
--- a/ChocolArm64/Memory/MemoryAlloc.cs
+++ /dev/null
@@ -1,114 +0,0 @@
-using System;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-namespace ChocolArm64.Memory
-{
-    public static class MemoryAlloc
-    {
-        public static bool HasWriteWatchSupport => RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
-
-        public static IntPtr Allocate(ulong size)
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                IntPtr sizeNint = new IntPtr((long)size);
-
-                return MemoryAllocWindows.Allocate(sizeNint);
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
-                     RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                return MemoryAllocUnix.Allocate(size);
-            }
-            else
-            {
-                throw new PlatformNotSupportedException();
-            }
-        }
-
-        public static IntPtr AllocateWriteTracked(ulong size)
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                IntPtr sizeNint = new IntPtr((long)size);
-
-                return MemoryAllocWindows.AllocateWriteTracked(sizeNint);
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
-                     RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                return MemoryAllocUnix.Allocate(size);
-            }
-            else
-            {
-                throw new PlatformNotSupportedException();
-            }
-        }
-
-        public static void Reprotect(IntPtr address, ulong size, MemoryProtection permission)
-        {
-            bool result;
-
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                IntPtr sizeNint = new IntPtr((long)size);
-
-                result = MemoryAllocWindows.Reprotect(address, sizeNint, permission);
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
-                     RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                result = MemoryAllocUnix.Reprotect(address, size, permission);
-            }
-            else
-            {
-                throw new PlatformNotSupportedException();
-            }
-
-            if (!result)
-            {
-                throw new MemoryProtectionException(permission);
-            }
-        }
-
-        public static bool Free(IntPtr address)
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                return MemoryAllocWindows.Free(address);
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
-                     RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                return MemoryAllocUnix.Free(address);
-            }
-            else
-            {
-                throw new PlatformNotSupportedException();
-            }
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool GetModifiedPages(
-            IntPtr    address,
-            IntPtr    size,
-            IntPtr[]  addresses,
-            out ulong count)
-        {
-            //This is only supported on windows, but returning
-            //false (failed) is also valid for platforms without
-            //write tracking support on the OS.
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                return MemoryAllocWindows.GetModifiedPages(address, size, addresses, out count);
-            }
-            else
-            {
-                count = 0;
-
-                return false;
-            }
-        }
-    }
-}
\ No newline at end of file