Re-added the HLE code that creates the cdb.vff file on first launch of the Wii sysmenu.

Revert "Remove HLE_IPC_CreateVirtualFATFilesystem as it no longer takes 3 minutes to LLE like the comment says."

This reverts commit 5d47fd1dde3ccdc286e2248db9967c278d694f5a.

Source/Core/Core/Src/Boot/Boot_WiiWAD.cpp

@@ -80,6 +80,8 @@ bool CBoot::Boot_WiiWAD(const char* _pFilename)
 	// create data directory
 	File::CreateFullPath(Common::GetTitleDataPath(titleID));
 	
+	if (titleID == TITLEID_SYSMENU)
+		HLE_IPC_CreateVirtualFATFilesystem();
 	// setup wii mem
 	if (!SetupWiiMemory(ContentLoader.GetCountry()))
 		return false;

Source/Core/Core/Src/IPC_HLE/WII_IPC_HLE_Device_FileIO.cpp

@@ -32,6 +32,39 @@ std::string HLE_IPC_BuildFilename(std::string path_wii, int _size)
 	return path_full;
 }
 
+void HLE_IPC_CreateVirtualFATFilesystem()
+{
+	const int cdbSize = 0x01400000;
+	const std::string cdbPath = Common::GetTitleDataPath(TITLEID_SYSMENU) + "cdb.vff";
+	if ((int)File::GetSize(cdbPath) < cdbSize)
+	{
+		// cdb.vff is a virtual Fat filesystem created on first launch of sysmenu
+		// we create it here as it is faster ~3 minutes for me when sysmenu does it ~1 second created here
+		const u8 cdbHDR[0x20] = {'V', 'F', 'F', 0x20, 0xfe, 0xff, 1, 0, 1, 0x40, 0, 0, 0, 0x20};
+		const u8 cdbFAT[4] = {0xf0, 0xff, 0xff, 0xff};
+
+		File::IOFile cdbFile(cdbPath, "wb");
+		if (cdbFile)
+		{
+			cdbFile.WriteBytes(cdbHDR, 0x20);
+			cdbFile.WriteBytes(cdbFAT, 0x4);
+			cdbFile.Seek(0x14020, SEEK_SET);
+			cdbFile.WriteBytes(cdbFAT, 0x4);
+			// 20 MiB file
+			cdbFile.Seek(cdbSize - 1, SEEK_SET);
+			// write the final 0 to 0 file from the second FAT to 20 MiB
+			cdbFile.WriteBytes(cdbHDR + 14, 1);
+			if (!cdbFile.IsGood())
+			{
+				cdbFile.Close();
+				File::Delete(cdbPath);
+			}
+			cdbFile.Flush();
+			cdbFile.Close();
+		}
+	}
+}
+
 CWII_IPC_HLE_Device_FileIO::CWII_IPC_HLE_Device_FileIO(u32 _DeviceID, const std::string& _rDeviceName)
 	: IWII_IPC_HLE_Device(_DeviceID, _rDeviceName, false)	// not a real hardware
 	, m_Mode(0)

Source/Core/Core/Src/IPC_HLE/WII_IPC_HLE_Device_FileIO.h

@@ -9,6 +9,7 @@
 #include "FileUtil.h"
 
 std::string HLE_IPC_BuildFilename(std::string _pFilename, int _size);
+void HLE_IPC_CreateVirtualFATFilesystem();
 
 class CWII_IPC_HLE_Device_FileIO : public IWII_IPC_HLE_Device
 {