03130f944a
Changes are based on Zedboard: Xilinx does not provide a specific DTS for Microzed in the kernel tree. It is suggested [1] to use the zynq-zed.dts and change the RAM size [1] https://forums.xilinx.com/t5/Embedded-Linux/Microzed-default-device-tree-dts/td-p/432856 [Thomas: - extend readme.txt to indicate why the same DTB is used for Microzed and the Zedboard. - add a description + Signed-off-by line in the 0001-zynq-Create-microzed-specific-U-Boot-environment.patch, by re-using the description of the same patch for the Zedboard.] Signed-off-by: Davide Viti <d.viti@infosolution.it> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
69 lines
2.0 KiB
Plaintext
69 lines
2.0 KiB
Plaintext
This is the buildroot board support for the Avnet Microzed. The Microzed is
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a development board based on the Xilinx Zynq-7000 based All-Programmable
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System-On-Chip.
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Microzed information including schematics, reference designs, and manuals are
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available from http://www.zedboard.org .
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Steps to create a working system for Microzed:
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1) make microzed_defconfig
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2) make
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3) copy files BOOT.BIN, u-boot-dtb.img, rootfs.cpio.uboot,
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uImage, zynq-zed.dtb into your SD card
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4) boot your Microzed
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The expected output:
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U-Boot SPL 2015.07 (Sep 15 2015 - 16:10:56)
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mmc boot
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reading system.dtb
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spl_load_image_fat_os: error reading image system.dtb, err - -1
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reading u-boot-dtb.img
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reading u-boot-dtb.img
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U-Boot 2015.07 (Sep 15 2015 - 16:10:56 +0200)
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Model: Zynq MicroZED Board
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I2C: ready
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DRAM: ECC disabled 1 GiB
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MMC: zynq_sdhci: 0
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Using default environment
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...
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When using an older U-Boot then 2015.07, a working ps7_init.c
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file is required to be installed into the U-Boot directory
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structure. From 2015.07, the major Zynq-based boards are
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supported without any manual intervention.
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Resulting system
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----------------
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A FAT32 partition should be created at the beginning of the SD Card
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and the following files should be installed:
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/BOOT.BIN
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/zynq-zed.dtb
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/uImage
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/rootfs-cpio.uboot
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/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
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available on output/images/.
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Note th at the DTB (zynq-zed.dtb) is the same as the one used for the
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Zedboard, and that this is the recommended solution, see
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https://forums.xilinx.com/t5/Embedded-Linux/Microzed-default-device-tree-dts/td-p/432856.
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There is a patch attached that redefines the U-Boot's environment
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to work with Buildroot out-of-the-box.
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You can alter the booting procedure by creating a file uEnv.txt
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in the root of the SD card. It is a plain text file in format
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<key>=<value> one per line:
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kernel_image=myimage
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modeboot=myboot
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myboot=...
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