ATF

Download ARM Trusted Firmware

Get the source code from github:

git clone https://github.com/ARM-software/arm-trusted-firmware.git

Supported Devices[edit]

Upstream ARM Trusted Firmware support Rockchip SoCs:

RK3399

 

Build ATF

Here is a mk-atf.sh script to build ATF.

$ cat mk-atf.sh 

#!/bin/bash

make realclean

CFLAGS='-gdwarf-2' \
CROSS_COMPILE=aarch64-linux-gnu- \
make PLAT=rk3399 DEBUG=1 ERROR_DEPRECATED=1 bl31

Because there is a blob of code for cortex-M0 in rk3399 ATF, so you need a compiler for it. Install it by:

sudo apt-get install gcc-arm-none-eabi

We can get bl31.bin when build completed.

 

Install ATF

Using U-Boot SPL FIT image

Upstream U-Boot SPL support for ATF still WIP.

Using Rockchip miniloader

Alternatively, you can use Rockchip miniloader and U-Boot instead which do not need SPL.

The ATF is loaded by miniloader, so it should be package to know format for miniloader

trust_merger rk_tools/RKTRUST/RK3399TRUST.ini atf.img

According to the partitions definition, write to atf.img offset 0x6000.