6c060f3d1a
When halting the boot process in u-boot, the 'usb start' command does not automatically run. Since the SD card is connected over a USB to SD card bridge on the kd240 and kr260 boards, the readme.txt instructions should document that the 'usb start' command needs to be manually enterred when following the reflashing instructions. Otherwise, the command to read the boot.bin and u-boot.itb files from the SD card will fail. Signed-off-by: Neal Frager <neal.frager@amd.com> Signed-off-by: Julien Olivain <ju.o@free.fr> (cherry picked from commit e02e59d124647af71b30eb224a78b53e77db61f5) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
119 lines
3.4 KiB
Plaintext
119 lines
3.4 KiB
Plaintext
**************************************************
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Xilinx Kria SOM Starter Kits - ZynqMP SoC
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**************************************************
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This document describes the Buildroot support for the Kria KD240,
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KR260 and KV260 starter kits by Xilinx, based on Kria SOM including the
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Zynq UltraScale+ MPSoC (aka ZynqMP). It has been tested with
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the KD240, KR260 and KV260 production boards.
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Evaluation board features can be found here with the links below.
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KD240:
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https://www.xilinx.com/products/som/kria/kd240-drives-starter-kit.html
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KR260:
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https://www.xilinx.com/products/som/kria/kr260-robotics-starter-kit.html
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KV260:
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https://www.xilinx.com/products/som/kria/kv260-vision-starter-kit.html
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How to build it
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===============
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Configure Buildroot: (use the command for the specific board)
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$ make zynqmp_kria_kd240_defconfig
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$ make zynqmp_kria_kr260_defconfig
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$ make zynqmp_kria_kv260_defconfig
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Compile everything and build the rootfs image:
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$ make
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Result of the build
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-------------------
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After building, you should get a tree like this:
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output/images/
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+-- atf-uboot.ub
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+-- bl31.bin
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+-- boot.bin
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+-- boot.vfat
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+-- Image
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+-- rootfs.ext2
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+-- rootfs.ext4 -> rootfs.ext2
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+-- sdcard.img
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+-- system.dtb -> smk-k26-revA-sck-kv-g-revB.dtb
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+-- u-boot.itb
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`-- smk-k26-revA-sck-kv-g-revB.dtb
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How to write the SD card
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========================
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WARNING! This will destroy all the card content. Use with care!
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The sdcard.img file is a complete bootable image ready to be written
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on the boot medium. To install it, simply copy the image to an SD
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card:
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# dd if=output/images/sdcard.img of=/dev/sdX
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Where 'sdX' is the device node of the SD.
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Eject the SD card, insert it in the board, and power it up.
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How to write boot.bin and u-boot.itb to QSPI boot flash
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=======================================================
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The Kria SOMs are preconfigured to boot initially from QSPI.
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This makes these boards different from other ZynqMP boards
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in that the boot.bin and u-boot.itb files need to be flashed
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into the QSPI boot flash such that U-Boot can then load all
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of the remaining images from the SD card.
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In addition, the Kria Starter Kits QSPI comes pre-flashed with
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a utility designed to make updating the QSPI flash memory
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easier.
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Instructions for using these utilities to update the files
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in QSPI flash can be found on the wiki link below.
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https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1641152513/Kria+K26+SOM#Boot-Firmware-Updates
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Additionally, it is possible to use u-boot for updating the
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QSPI with new boot.bin and u-boot.itb images with the u-boot
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commands below.
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KV260 Flashing Instructions:
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Flashing u-boot.itb:
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$ sf probe
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$ fatload mmc 1 0x1000000 u-boot.itb
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$ sf erase 0xf80000 +$filesize
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$ sf write 0x1000000 0xf80000 $filesize
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Flashing boot.bin:
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$ sf probe
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$ fatload mmc 1 0x1000000 boot.bin
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$ sf erase 0x200000 +$filesize
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$ sf write 0x1000000 0x200000 $filesize
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KD240 / KR260 Flashing Instructions:
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Flashing u-boot.itb:
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$ usb start
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$ sf probe
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$ fatload usb 0 0x1000000 u-boot.itb
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$ sf erase 0xf80000 +$filesize
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$ sf write 0x1000000 0xf80000 $filesize
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Flashing boot.bin:
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$ usb start
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$ sf probe
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$ fatload usb 0 0x1000000 boot.bin
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$ sf erase 0x200000 +$filesize
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$ sf write 0x1000000 0x200000 $filesize
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It is possible to boot the Buildroot generated SD card image without
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updating the QSPI boot.bin image, so this is an optional step.
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