gba: some memory domains

BizHawk.Emulation/Consoles/Nintendo/GBA/LibMeteor.cs

@@ -111,5 +111,26 @@ namespace BizHawk.Emulation.Consoles.Nintendo.GBA
 		[DllImport("libmeteor.dll", CallingConvention = CallingConvention.Cdecl)]
 		public static extern void libmeteor_setkeycallback(InputCallback callback);
 
+		/// <summary>
+		/// parameter to libmeteor_getmemoryarea
+		/// </summary>
+		public enum MemoryArea : int
+		{
+			bios = 0,
+			ewram = 1,
+			iwram = 2,
+			palram = 3,
+			vram = 4,
+			oam = 5,
+			rom = 6
+		}
+
+		/// <summary>
+		/// return a pointer to a memory area
+		/// </summary>
+		/// <param name="which"></param>
+		/// <returns>IntPtr.Zero if which is unrecognized</returns>
+		[DllImport("libmeteor.dll", CallingConvention = CallingConvention.Cdecl)]
+		public static extern IntPtr libmeteor_getmemoryarea(MemoryArea which);
 	}
 }

BizHawk.Emulation/Consoles/Nintendo/GBA/Meteor.cs

@@ -29,6 +29,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo.GBA
 			LibMeteor.libmeteor_reset();
 			LibMeteor.libmeteor_loadbios(bios, (uint)bios.Length);
 			LibMeteor.libmeteor_loadrom(rom, (uint)rom.Length);
+
+			SetUpMemoryDomains();
 		}
 
 		public void FrameAdvance(bool render, bool rendersound = true)
@@ -110,16 +112,63 @@ namespace BizHawk.Emulation.Consoles.Nintendo.GBA
 
 		public CoreOutputComm CoreOutputComm { get { return _CoreOutputComm; } }
 
-		public IList<MemoryDomain> MemoryDomains
-		{
-			get { return null; }
-		}
+		#region memorydomains
 
+		List<MemoryDomain> _MemoryDomains = new List<MemoryDomain>();
+		public IList<MemoryDomain> MemoryDomains { get { return _MemoryDomains; } }
 		public MemoryDomain MainMemory
 		{
-			get { return null; }
+			// some core tools assume MainMemory == MemoryDomains[0], so do that anyway
+			get { return MemoryDomains[0]; }
 		}
 
+		void AddMemoryDomain(LibMeteor.MemoryArea which, int size, string name)
+		{
+			IntPtr data = LibMeteor.libmeteor_getmemoryarea(which);
+			if (data == IntPtr.Zero)
+				throw new Exception("libmeteor_getmemoryarea() returned NULL??");
+
+			MemoryDomain md = new MemoryDomain(name, size, Endian.Little,
+				delegate(int addr)
+				{
+					unsafe
+					{
+						byte* d = (byte*)data;
+						if (addr < 0 || addr >= size)
+							throw new IndexOutOfRangeException();
+						return d[addr];
+					}
+				},
+				delegate(int addr, byte val)
+				{
+					unsafe
+					{
+						byte* d = (byte*)data;
+						if (addr < 0 || addr >= size)
+							throw new IndexOutOfRangeException();
+						d[addr] = val;
+					}
+				});
+			_MemoryDomains.Add(md);
+		}
+
+		void SetUpMemoryDomains()
+		{
+			_MemoryDomains.Clear();
+			// this must be first to coincide with "main memory"
+			// note that ewram could also be considered main memory depending on which hairs you split
+			AddMemoryDomain(LibMeteor.MemoryArea.iwram, 32 * 1024, "IWRAM");
+			AddMemoryDomain(LibMeteor.MemoryArea.ewram, 256 * 1024, "EWRAM");
+			AddMemoryDomain(LibMeteor.MemoryArea.bios, 16 * 1024, "BIOS");
+			AddMemoryDomain(LibMeteor.MemoryArea.palram, 1024, "PALRAM");
+			AddMemoryDomain(LibMeteor.MemoryArea.vram, 96 * 1024, "VRAM");
+			AddMemoryDomain(LibMeteor.MemoryArea.oam, 1024, "OAM");
+			// even if the rom is less than 32MB, the whole is still valid in meteor
+			AddMemoryDomain(LibMeteor.MemoryArea.rom, 32 * 1024 * 1024, "ROM");
+		}
+
+		#endregion
+
 		/// <summary>like libsnes, the library is single-instance</summary>
 		static GBA attachedcore;
 		/// <summary>hold pointer to message callback so it won't get GCed</summary>
@@ -191,6 +240,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo.GBA
 				inputcallback = null;
 				LibMeteor.libmeteor_setmessagecallback(messagecallback);
 				LibMeteor.libmeteor_setkeycallback(inputcallback);
+				_MemoryDomains.Clear();
 			}
 		}
 

libmeteor/cinterface.cpp

@@ -130,5 +130,10 @@ EXPORT void libmeteor_loadbios(const void *data, unsigned size)
 	AMeteor::_memory.LoadBios((const uint8_t*)data, size);
 }
 
-// TODO: memory domains
+EXPORT uint8_t *libmeteor_getmemoryarea(int which)
+{
+	return AMeteor::_memory.GetMemoryArea(which);
+}
+
+// TODO: cartram and system bus memory domains
 

libmeteor/include/ameteor/memory.hpp

@@ -120,6 +120,8 @@ namespace AMeteor
 
 			void TimeEvent ();
 
+			uint8_t* GetMemoryArea(int which);
+
 		private :
 			// times for a 8 or 16 bits access
 			uint8_t m_memtime[0xF];

libmeteor/source/memory.cpp

@@ -820,4 +820,27 @@ namespace AMeteor
 		if (m_cart->Write(add, val))
 			CLOCK.SetBattery(CART_SAVE_TIME);
 	}
+
+	uint8_t *Memory::GetMemoryArea(int which)
+	{
+		switch (which)
+		{
+		case 0:
+			return m_brom; // BIOS - System ROM
+		case 1:
+			return m_wbram; // WRAM - On-board Work RAM
+		case 2:
+			return m_wcram; // WRAM - In-chip Work RAM
+		case 3:
+			return m_pram; // BG/OBJ Palette RAM
+		case 4:
+			return m_vram; // VRAM - Video RAM
+		case 5:
+			return m_oram; // OAM - OBJ Attributes
+		case 6:
+			return m_rom; // Game Pake ROM/FlashROM (max 32MB)
+		default:
+			return 0;
+		}
+	}
 }