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zedboard: Update readme.txt to reflect BOOT.BIN generation

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Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Jan Viktorin 2015-07-14 17:16:14 +02:00 committed by Thomas Petazzoni
parent 4db53c3848
commit c139f0cce7
1 changed files with 38 additions and 46 deletions
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84
board/avnet/zedboard/readme.txt
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@ -5,68 +5,60 @@ System-On-Chip.
Zedboard information including schematics, reference designs, and manuals are
available from http://www.zedboard.org .
The U-Boot firmware for the Xilinx Zynq All Programmable SoC depends
on some proprietary code. This dependency consists of a pair of
files are available from the Xilinx SDK installation.
Steps to create a working system for Zedboard:
You will need these files from Xilinx SDK installation to generate
the U-Boot firmware:
ps7_init.c
ps7_init.h
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
Buildroot will create the following files and place them in the
<output>/images directory.
zynq-zed.dtb
rootfs.cpio.uboot
uImage
u-boot.img
boot.bin
The expected output:
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
uboot.bin -- U-Boot SPL w/ Xilinx boot.bin wrapper
---------------------------------------------------
U-Boot 2015.07-rc2 (Jun 18 2015 - 16:42:58 +0200)
Due to licensing issues, the files ps7_init.c/h are not able to be
distributed with the U-Boot source code. These files are required to make a
boot.bin file.
If you already have the Xilinx tools installed, the following sequence will
unpack, patch and build the rfs, kernel, uboot, and uboot-spl.
make zedboard_defconfig
make uboot-patch
cp ${XILINX}/ISE_DS/EDK/sw/lib/hwplatform_templates/zed_hw_platform/ps7_init.{c,h} \
output/build/uboot-xilinx-v2014.1/board/xilinx/zynq/
After copying these files into the U-Boot source tree, you can
continue the build with:
make
*Notice*
While the build will successfully complete without the ps7_init.*
files, the uboot.bin file generated by this configuration will not
function properly on the Zedboard. Therefore, it is imperative that
the ps7_init.* files be copied into the U-Boot source tree any time
the clean, or uboot-dirclean targets are made.
Model: Zynq ZED Board
I2C: ready
DRAM: ECC disabled 512 MiB
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
/devicetree.dtb
/BOOT.BIN
/zynq-zed.dtb
/uImage
/uramdisk.image.gz
/u-boot.img
/rootfs-cpio.uboot
/u-boot-dtb.img
All needed files can be taken from output/images/
boot.bin, uImage and u-boot.img are direct copies of the same files
BOOT.BIN, uImage and u-boot-dtb.img are direct copies of the same files
available on output/images/
devicetree.dtb is just zynq-zed.dtb renamed.
There is a patch attached that redefines the U-Boot's environment
to work with Buildroot out-of-the-box.
uramdisk.image.gz is rootfs.cpio.uboot renamed
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=...