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- **************************************************
- Xilinx Kria SOM Starter Kits - ZynqMP SoC
- **************************************************
- This document describes the Buildroot support for the Kria KD240,
- KR260 and KV260 starter kits by Xilinx, based on Kria SOM including the
- Zynq UltraScale+ MPSoC (aka ZynqMP). It has been tested with
- the KD240, KR260 and KV260 production boards.
- Evaluation board features can be found here with the links below.
- KD240:
- https://www.xilinx.com/products/som/kria/kd240-drives-starter-kit.html
- KR260:
- https://www.xilinx.com/products/som/kria/kr260-robotics-starter-kit.html
- KV260:
- https://www.xilinx.com/products/som/kria/kv260-vision-starter-kit.html
- How to build it
- ===============
- Configure Buildroot: (use the command for the specific board)
- $ make zynqmp_kria_kd240_defconfig
- $ make zynqmp_kria_kr260_defconfig
- $ make zynqmp_kria_kv260_defconfig
- Compile everything and build the rootfs image:
- $ make
- Result of the build
- -------------------
- After building, you should get a tree like this:
- output/images/
- +-- atf-uboot.ub
- +-- bl31.bin
- +-- boot.bin
- +-- boot.vfat
- +-- Image
- +-- rootfs.ext2
- +-- rootfs.ext4 -> rootfs.ext2
- +-- sdcard.img
- +-- system.dtb -> smk-k26-revA-sck-kv-g-revB.dtb
- +-- u-boot.itb
- `-- smk-k26-revA-sck-kv-g-revB.dtb
- How to write the SD card
- ========================
- WARNING! This will destroy all the card content. Use with care!
- The sdcard.img file is a complete bootable image ready to be written
- on the boot medium. To install it, simply copy the image to an SD
- card:
- # dd if=output/images/sdcard.img of=/dev/sdX
- Where 'sdX' is the device node of the SD.
- Eject the SD card, insert it in the board, and power it up.
- How to write boot.bin and u-boot.itb to QSPI boot flash
- =======================================================
- The Kria SOMs are preconfigured to boot initially from QSPI.
- This makes these boards different from other ZynqMP boards
- in that the boot.bin and u-boot.itb files need to be flashed
- into the QSPI boot flash such that U-Boot can then load all
- of the remaining images from the SD card.
- In addition, the Kria Starter Kits QSPI comes pre-flashed with
- a utility designed to make updating the QSPI flash memory
- easier.
- Instructions for using these utilities to update the files
- in QSPI flash can be found on the wiki link below.
- https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1641152513/Kria+K26+SOM#Boot-Firmware-Updates
- Additionally, it is possible to use u-boot for updating the
- QSPI with new boot.bin and u-boot.itb images with the u-boot
- commands below.
- KV260 Flashing Instructions:
- Flashing u-boot.itb:
- $ sf probe
- $ fatload mmc 1 0x1000000 u-boot.itb
- $ sf erase 0xf80000 +$filesize
- $ sf write 0x1000000 0xf80000 $filesize
- Flashing boot.bin:
- $ sf probe
- $ fatload mmc 1 0x1000000 boot.bin
- $ sf erase 0x200000 +$filesize
- $ sf write 0x1000000 0x200000 $filesize
- KD240 / KR260 Flashing Instructions:
- Flashing u-boot.itb:
- $ usb start
- $ sf probe
- $ fatload usb 0 0x1000000 u-boot.itb
- $ sf erase 0xf80000 +$filesize
- $ sf write 0x1000000 0xf80000 $filesize
- Flashing boot.bin:
- $ usb start
- $ sf probe
- $ fatload usb 0 0x1000000 boot.bin
- $ sf erase 0x200000 +$filesize
- $ sf write 0x1000000 0x200000 $filesize
- It is possible to boot the Buildroot generated SD card image without
- updating the QSPI boot.bin image, so this is an optional step.
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