U-Boot for Carambola2/Lima based boards

1. Build buildroot toolchain (http://buildroot.org)

Download:

cd your_work_dir
git clone git://git.buildroot.net/buildroot
git checkout 2016.02

Configure:

cd buildroot
make menuconfig

In Target Options select Target Architecture as MIPS (big endian) and Target Architecture Variant as mips 32r2. In Toolchain select GCC Compiler version as gcc 4.7.x. Save and exit.

Build:

make toolchain

2. Build Caraboot image

Download:

cd your_work_dir
git clone https://github.com/8devices/Caraboot.git

Configure: Open Caraboot Makefile and change CONFIG_TOOLCHAIN_PREFIX to your buildroot binary path, i.e CONFIG_TOOLCHAIN_PREFIX=your_work_dir/buildroot/output/host/usr/bin/mips-linux-

cd Caraboot
vi/nano/gedit Makefile

Build:

make BOARD_TYPE=carambola2

or

make BOARD_TYPE=lima

The bootloader binary will be saved to bin/carambola2_u-boot.bin / bin/lima_u-boot.bin file. You can now use this file to upgrade your bootloader on Carambola2 (http://8devices.com/wiki/carambola2:uboot) or Lima (http://8devices.com/wiki/lima:uboot).