NIOS 2 EPCQ and SDRAM for program code

For this application note

https://www.altera.com/en_us/pdfs/literature/an/an736.pdf

It describes how to boot NIOS from EPCQ flash. Program is in the EPCQ flash. In one of the examples in the app note, they show how the program is loaded from the EPCQ to the on chip memory. The clock for the EPCQ flash controller is 25mhz.

I have a DE1-SOC board which has SDRAM with the FPGA. I could run NIOS and run programs from the ON chip memory. I could access the SDRAM for data writing and reading. NIOS system runs with the 143mhz because of the SDRAM.

I need to add the EPCQ flash controller with the system while working with its max freq 25MHz.

I don't know how to load the program from the EPCQ to the SDRAM and then run the program from the SDRAM. I want help in understanding this.

Thanks