buildroot

This is the buildroot board support for the Avnet Zedboard. The Zedboard is

a development board based on the Xilinx Zynq-7000 based All-Programmable

System-On-Chip.

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Zedboard information including schematics, reference designs, and manuals are

available from http://www.zedboard.org .

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Steps to create a working system for Zedboard:

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1) make zedboard_defconfig

2) make

3) copy files BOOT.BIN, u-boot-dtb.img, rootfs.cpio.uboot,

    uImage, zynq-zed.dtb into your SD card

4) boot your Zedboard

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The expected output:

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 U-Boot SPL 2015.07-rc2 (Jun 18 2015 - 16:42:58)

 mmc boot

 reading system.dtb

 spl_load_image_fat_os: error reading image system.dtb, err - -1

 reading u-boot-dtb.img

 reading u-boot-dtb.img

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 U-Boot 2015.07-rc2 (Jun 18 2015 - 16:42:58 +0200)

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 Model: Zynq ZED Board

 I2C:   ready

 DRAM:  ECC disabled 512 MiB

 MMC:   zynq_sdhci: 0

 Using default environment

 ...

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When using an older U-Boot then 2015.07, a working ps7_init.c

file is required to be installed into the U-Boot directory

structure. From 2015.07, the major Zynq-based boards are

supported without any manual intervention.

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Resulting system

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A FAT32 partition should be created at the beginning of the SD Card

and the following files should be installed:

    /BOOT.BIN

    /zynq-zed.dtb

    /uImage

    /rootfs-cpio.uboot

    /u-boot-dtb.img

​

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All needed files can be taken from output/images/

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BOOT.BIN, uImage and u-boot-dtb.img are direct copies of the same files

available on output/images/

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There is a patch attached that redefines the U-Boot's environment

to work with Buildroot out-of-the-box.

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You can alter the booting procedure by creating a file uEnv.txt

in the root of the SD card. It is a plain text file in format

<key>=<value> one per line:

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kernel_image=myimage

modeboot=myboot

myboot=...