cc9p9215 has SDRAM on the module and not on the developement board. Are you sure you are using cc9p9215 module or perhaps a custom NS9215 based design? IF you are using custom NS9215 design and not the module, first start with changing the debugger script C:\netos75\debugger_files\gdbcc9p9215_a.jlink and make sure SDRAM works via JTAG.