I am working with i.MX 6 Solo X Sabre SD board and trying to bring up the board using custom built kernel, u-boot and RFS(with Buildroot).
1. Where can we get the sources of MBR (Stage 1 Bootloader) ?
2. I need to know how to add commands to U-boot shell Ex: bootaux (codes are available, viz bootaux.c etc) since I am not aware of U-boot compilation.