This is the buildroot board support for the Avnet Microzed. The Microzed is
a development board based on the Xilinx Zynq-7000 based All-Programmable
System-On-Chip.
Microzed information including schematics, reference designs, and manuals are
available from http://www.zedboard.org .
Steps to create a working system for Microzed:
1) make microzed_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 Microzed
The expected output:
U-Boot SPL 2015.07 (Sep 15 2015 - 16:10:56)
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
U-Boot 2015.07 (Sep 15 2015 - 16:10:56 +0200)
Model: Zynq MicroZED Board
I2C: ready
DRAM: ECC disabled 1 GiB
MMC: zynq_sdhci: 0
Using default environment
...
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.
Resulting system
----------------
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
All needed files can be taken from output/images/
BOOT.BIN, uImage and u-boot-dtb.img are direct copies of the same files
available on output/images/.
Note th at the DTB (zynq-zed.dtb) is the same as the one used for the
Zedboard, and that this is the recommended solution, see
https://forums.xilinx.com/t5/Embedded-Linux/Microzed-default-device-tree-dts/td-p/432856.
There is a patch attached that redefines the U-Boot's environment
to work with Buildroot out-of-the-box.
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:
kernel_image=myimage
modeboot=myboot
myboot=...
03130f944a