Booting Dragonboard 410c using ramdisk image

I have created boot image as per the instructions of page link given below.

The ramdisk ,dt.img and kernel images are all built appropriately as per the instructions. But still facing issue which is shown below.

Gave up waiting for root file system device. Common problems:

  • Boot args (cat /proc/cmdline)
    • Check rootdelay= (did the system wait long enough?)
  • Missing modules (cat /proc/modules; ls /dev)
    ALERT! /dev/ram0 does not exist. Dropping to a shell!

Does anyone have any idea how to solve this…If you know please let me know.