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Add i.MX8ULP platform introduction. Signed-off-by: Jacky Bai <ping.bai@nxp.com> Change-Id: Idc16bcf5b23542f8a1f394a474309239ddcb9685
69 lines
2.6 KiB
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69 lines
2.6 KiB
ReStructuredText
NXP i.MX 8ULP
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==================
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i.MX 8ULP is part of the ULP family with emphasis on extreme low-power techniques
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using the 28 nm fully depleted silicon on insulator process. Like i.MX 7ULP,
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i.MX 8ULP continues to be based on asymmetric architecture.
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The i.MX 8ULP family of processors features NXP’s advanced implementation of the
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dual Arm Cortex-A35 cores alongside an Arm Cortex-M33. This combined architecture
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enables the device to run a rich operating system (such as Linux) on the Cortex-A35
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core and an RTOS (such as FreeRTOS) on the Cortex-M33 core. It also includes a Cadence
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Tensilica Fusion DSP for low-power audio and a HiFi4 DSP for advanced audio and machine
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learning applications.
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The design enables clean separation between two processing domains, where each has
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separate power, clocking and peripheral islands, but the bus fabric of each domain
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is tightly integrated for efficient communication. The part is streamlined to minimize
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pin count, enabling small packages and simple system integration. This microprocessor
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is intended for applications where efficiency and simple system integration is important.
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`i.MX8ULP Applications Processors`_.
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Boot Sequence
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-------------
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BootROM --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel
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How to build
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------------
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Build Procedure
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~~~~~~~~~~~~~~~
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- Prepare AARCH64 toolchain.
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- Get the ELE FW image from NXP linux SDK package
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- Build SPL and u-boot firstly, and get binary images: u-boot-spl.bin,
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u-boot.bin and dtb
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- Build TF-A
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Build bl31:
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.. code:: shell
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CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31
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Target_SoC should be "imx8ulp" for i.MX8ULP SoC.
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Deploy TF-A Images
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~~~~~~~~~~~~~~~~~~
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TF-A binary(bl31.bin), u-boot-spl.bin u-boot.bin, ELE FW image are combined
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together to generate a binary file called flash.bin, the imx-mkimage tool is
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used to generate flash.bin, and flash.bin needs to be flashed into SD card
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with certain offset for BOOT ROM.
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Reference Documentation
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~~~~~~~~~~~~~~~~~~~~~~~
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Details on how to prepare, generate & deploy the boot image be found in following documents:
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- i.MX Linux User's Guide
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`link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__
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- i.MX Linux Reference Manual
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`link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__
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.. _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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