If you do not wish to use the global reset, you must assign it to a pin that is tied to ground on your board.
If you are using the DSP Development Board, for example, you can assign the reset to any of the fast I/O pins, which are grounded. All pin assignments must be made in the Quartus® II software.
If you wish to use the global reset, you must assign it to a pin that can be driven by a logic level 1 or a logic level 0 on your board. If you are using the DSP development board, you can assign the global reset to one of the four pins connected to side switches.