This repository contains the source for U-Boot for Ubiquity E200 boards (aka EdgeRouter ER-8 and ERPro-8). It is based on the GPL tarball released by Ubiquity with a few minor adjustments.
The original tarball name is:
EdgeRouter ER-8/ERPro-8/EP-R8 Firmware v1.9.11
GPL.ER-e200.v1.9.1.1.4977353.tar.bz2
The modifications are mostly to get it to build with a "standard" mips toolchain and to enable a number of missing U-Boot commands. The environment is moved to a different flash location to allow chainloading.
Assuming your cross toolchain prefix is mips-linux-gnu-, run:
make CROSS_COMPILE=mips-linux-gnu- octeon_ubnt_e200_config
make CROSS_COMPILE=mips-linux-gnu- -j$(nproc)
The file u-boot-octeon_ubnt_e200.bin should contain the bootloader image.
This image is designed to be chainloaded from an existing U-Boot by simply
jumping to the first instruction.
Octeon ubnt_e200# tftpboot 0x02000000 u-boot-octeon_ubnt_e200.bin
Octeon ubnt_e200# go 0x82000000