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.
   Target_SoC should be "imx8mm" for i.MX8MM 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.