Move C++ code into cpp/ dir (#941)

- Moved C++ code to cpp/ from src/raspberrypi
- Related updates to Makefile, easyinstall.sh, and the github build rules
- Removed the native X68k C code in src/x68k from the repo

cpp/devices/interfaces/scsi_block_commands.h

@@ -0,0 +1,30 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2021-2022 Uwe Seimet
+//
+// Interface for SCSI block commands (see https://www.t10.org/drafts.htm, SBC-5)
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+class ScsiBlockCommands
+{
+
+public:
+
+	ScsiBlockCommands() = default;
+	virtual ~ScsiBlockCommands() = default;
+
+	// Mandatory commands
+	virtual void FormatUnit() = 0;
+	virtual void ReadCapacity10() = 0;
+	virtual void ReadCapacity16() = 0;
+	virtual void Read10() = 0;
+	virtual void Read16() = 0;
+	virtual void Write10() = 0;
+	virtual void Write16() = 0;
+};

cpp/devices/interfaces/scsi_mmc_commands.h

@@ -0,0 +1,23 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2021-2022 Uwe Seimet
+//
+// Interface for SCSI Multi-Media commands (see https://www.t10.org/drafts.htm, MMC-6)
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+class ScsiMmcCommands
+{
+
+public:
+
+	ScsiMmcCommands() = default;
+	virtual ~ScsiMmcCommands() = default;
+
+	virtual void ReadToc() = 0;
+};

cpp/devices/interfaces/scsi_primary_commands.h

@@ -0,0 +1,29 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2021-2022 Uwe Seimet
+//
+// Interface for SCSI primary commands (see https://www.t10.org/drafts.htm, SPC-6)
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+class ScsiPrimaryCommands
+{
+
+public:
+
+	ScsiPrimaryCommands() = default;
+	virtual ~ScsiPrimaryCommands() = default;
+
+	// Mandatory commands
+	virtual void TestUnitReady() = 0;
+	virtual void Inquiry() = 0;
+	virtual void ReportLuns() = 0;
+
+	// Implemented for all RaSCSI device types
+	virtual void RequestSense() = 0;
+};

cpp/devices/interfaces/scsi_printer_commands.h

@@ -0,0 +1,27 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2021-2022 Uwe Seimet
+//
+// Interface for SCSI printer commands (see SCSI-2 specification)
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+class ScsiPrinterCommands
+{
+
+public:
+
+	ScsiPrinterCommands() = default;
+	virtual ~ScsiPrinterCommands() = default;
+
+	// Mandatory commands
+	virtual void Print() = 0;
+	virtual void ReleaseUnit() = 0;
+	virtual void ReserveUnit() = 0;
+	virtual void SendDiagnostic() = 0;
+};