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NXP i.MX 9 Series
==================
Building on the market-proven i.MX 6 and i.MX 8 series, i.MX 9 series applications
processors bring together higher performance applications cores, an independent
MCU-like real-time domain, Energy Flex architecture, state-of-the-art security
with EdgeLock® secure enclave and dedicated multi-sensory data processing engines
(graphics, image, display, audio and voice). The i.MX 9 series, part of the EdgeVerse™
edge computing platform, integrates hardware neural processing units across many
members of the series for acceleration of machine learning applications at the edge
`i.MX9 Applications Processors`_.
Boot Sequence
-------------
BootROM --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel
How to build
------------
Build Procedure
~~~~~~~~~~~~~~~
- Prepare AARCH64 toolchain.
- Get the ELE FW image from NXP linux SDK package
- Build SPL and u-boot firstly, and get binary images: u-boot-spl.bin,
u-boot.bin and dtb
- Build TF-A
Build bl31:
.. code:: shell
CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31
Target_SoC should be "imx93" for i.MX93 SoC.
Deploy TF-A Images
~~~~~~~~~~~~~~~~~~
TF-A binary(bl31.bin), u-boot-spl.bin u-boot.bin, ELE FW image 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.
Reference Documentation
~~~~~~~~~~~~~~~~~~~~~~~
Details on how to prepare, generate & deploy the boot image be found in following documents:
- i.MX Linux User's Guide
`link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__
- i.MX Linux Reference Manual
`link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__
.. _i.MX9 Applications Processors: https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i-mx-applications-processors/i-mx-9-processors:IMX9-PROCESSORS
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