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- NXP i.MX 8ULP
- ==================
- i.MX 8ULP is part of the ULP family with emphasis on extreme low-power techniques
- using the 28 nm fully depleted silicon on insulator process. Like i.MX 7ULP,
- i.MX 8ULP continues to be based on asymmetric architecture.
- The i.MX 8ULP family of processors features NXP’s advanced implementation of the
- dual Arm Cortex-A35 cores alongside an Arm Cortex-M33. This combined architecture
- enables the device to run a rich operating system (such as Linux) on the Cortex-A35
- core and an RTOS (such as FreeRTOS) on the Cortex-M33 core. It also includes a Cadence
- Tensilica Fusion DSP for low-power audio and a HiFi4 DSP for advanced audio and machine
- learning applications.
- The design enables clean separation between two processing domains, where each has
- separate power, clocking and peripheral islands, but the bus fabric of each domain
- is tightly integrated for efficient communication. The part is streamlined to minimize
- pin count, enabling small packages and simple system integration. This microprocessor
- is intended for applications where efficiency and simple system integration is important.
- `i.MX8ULP 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 "imx8ulp" for i.MX8ULP 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.MX8ULP Applications Processors: https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i-mx-applications-processors/i-mx-8-applications-processors/i-mx-8ulp-applications-processor-family:i.MX8ULP
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