blob: ab33a8a5f93d4dab3b4ec0309009253274e91891 [file] [log] [blame]
Description
===========
The i.MX 8M family of applications processors based on Arm Corte-A53 and Cortex-M4
cores provide high-performance computing, power efficiency, enhanced system
reliability and embedded security needed to drive the growth of fast-growing
edge node computing, streaming multimedia, and machine learning applications.
Boot Sequence
=============
Bootrom --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel
How to build
============
Build Procedure
---------------
- Prepare AARCH64 toolchain.
- Build spl and u-boot firstly, and get binary images: u-boot-spl.bin,
u-boot-nodtb.bin and dtb for the target board.
- Build TF-A
Build bl31:
.. code:: shell
CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31
Target_SoC should be "imx8mq" for i.MX8MQ SoC.
Deploy TF-A Images
-----------------
TF-A binary(bl31.bin), u-boot-spl.bin u-boot-nodtb.bin and dtb are combined
together to generate a binary file called flash.bin, the imx-mkimage tool is
used to generate flash.bin, and flash.bin needs to be flashed into SD card
with certain offset for BOOT ROM. the u-boot and imx-mkimage will be upstreamed
soon, this doc will be updated once they are ready, and the link will be posted.