Renesas provides the R-Car S4 SDK, software that runs on the R-Car S4 SoC.
This video, Part 2 of Linux BSP setup in the 'R-Car S4 Startup Guide', explains 'Boot Kernel with TFTP and NFS Server' as the following steps.
- Set up TFTP and NFS environment then prepare image, DTB files, and userland.
- Boot up Kernel on Spider board by using TFTP and NFS server.