From f77694e4f774c9391aad5344e70a7c8721cfedc6 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sun, 3 May 2020 19:54:50 -0300
Subject: 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
---
 ARMeilleure/Memory/MemoryManagementUnix.cs | 94 ------------------------------
 1 file changed, 94 deletions(-)
 delete mode 100644 ARMeilleure/Memory/MemoryManagementUnix.cs

(limited to 'ARMeilleure/Memory/MemoryManagementUnix.cs')

diff --git a/ARMeilleure/Memory/MemoryManagementUnix.cs b/ARMeilleure/Memory/MemoryManagementUnix.cs
deleted file mode 100644
index e9b29608..00000000
--- a/ARMeilleure/Memory/MemoryManagementUnix.cs
+++ /dev/null
@@ -1,94 +0,0 @@
-using Mono.Unix.Native;
-using System;
-
-namespace ARMeilleure.Memory
-{
-    static class MemoryManagementUnix
-    {
-        public static IntPtr Allocate(ulong size)
-        {
-            ulong pageSize = (ulong)Syscall.sysconf(SysconfName._SC_PAGESIZE);
-
-            const MmapProts prot = MmapProts.PROT_READ | MmapProts.PROT_WRITE;
-
-            const MmapFlags flags = MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS;
-
-            IntPtr ptr = Syscall.mmap(IntPtr.Zero, size + pageSize, prot, flags, -1, 0);
-
-            if (ptr == IntPtr.Zero)
-            {
-                throw new OutOfMemoryException();
-            }
-
-            unsafe
-            {
-                ptr = new IntPtr(ptr.ToInt64() + (long)pageSize);
-
-                *((ulong*)ptr - 1) = size;
-            }
-
-            return ptr;
-        }
-
-        public static bool Commit(IntPtr address, ulong size)
-        {
-            return Syscall.mprotect(address, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE) == 0;
-        }
-
-        public static bool Reprotect(IntPtr address, ulong size, Memory.MemoryProtection protection)
-        {
-            MmapProts prot = GetProtection(protection);
-
-            return Syscall.mprotect(address, size, prot) == 0;
-        }
-
-        public static IntPtr Reserve(ulong size)
-        {
-            ulong pageSize = (ulong)Syscall.sysconf(SysconfName._SC_PAGESIZE);
-
-            const MmapProts prot = MmapProts.PROT_NONE;
-
-            const MmapFlags flags = MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS;
-
-            IntPtr ptr = Syscall.mmap(IntPtr.Zero, size + pageSize, prot, flags, -1, 0);
-
-            if (ptr == IntPtr.Zero)
-            {
-                throw new OutOfMemoryException();
-            }
-
-            return ptr;
-        }
-
-        private static MmapProts GetProtection(Memory.MemoryProtection protection)
-        {
-            switch (protection)
-            {
-                case Memory.MemoryProtection.None:             return MmapProts.PROT_NONE;
-                case Memory.MemoryProtection.Read:             return MmapProts.PROT_READ;
-                case Memory.MemoryProtection.ReadAndWrite:     return MmapProts.PROT_READ | MmapProts.PROT_WRITE;
-                case Memory.MemoryProtection.ReadAndExecute:   return MmapProts.PROT_READ | MmapProts.PROT_EXEC;
-                case Memory.MemoryProtection.ReadWriteExecute: return MmapProts.PROT_READ | MmapProts.PROT_WRITE | MmapProts.PROT_EXEC;
-                case Memory.MemoryProtection.Execute:          return MmapProts.PROT_EXEC;
-
-                default: throw new ArgumentException($"Invalid permission \"{protection}\".");
-            }
-        }
-
-        public static bool Free(IntPtr address)
-        {
-            ulong pageSize = (ulong)Syscall.sysconf(SysconfName._SC_PAGESIZE);
-
-            ulong size;
-
-            unsafe
-            {
-                size = *((ulong*)address - 1);
-
-                address = new IntPtr(address.ToInt64() - (long)pageSize);
-            }
-
-            return Syscall.munmap(address, size + pageSize) == 0;
-        }
-    }
-}
\ No newline at end of file
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