I am working with Cyclone V 5CSEA4 FPGA,in that i have created the custom image by using dunfel-yocto and meta-altera after writing the image into the sd card , i have found the boot and root partion. In my boot partition i have only .dtb and zimage. I didnt,t have the rbf file and scr file like the prebuild image.Can any one give the procedure to boot my board with the custom image.