ZYNQ release 14.3

最新推荐文章于 2021-07-02 21:49:28 发布

转载最新推荐文章于 2021-07-02 21:49:28 发布 · 956 阅读

本文提供Xilinx Zynq软件版本14.3的相关信息、发布内容、重要变更、支持平台、启动Linux的变化、文件名更改、Linux内核配置、已知问题、发布Git标签、详细发布说明和文件列表。重点包括了SD文件名变化、启动Linux的变化、内核配置调整、已知问题解决和发布下载链接。

Zynq Release 14.3

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This page contains information documentation and release information corresponding to Xilinx software version 14.3.

Documentation

Release Contents

Significant Release Changes

Supported Platforms

Booting Linux Changes

SD File Name Changes

Linux Kernel Configuration

Known Issues

Release Git Tags

Release Details

Files In Release

Ramdisk Details

Release Download

Documentation

General Zynq
http://www.xilinx.com/support/documentation/zynq-7000.htm
http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf

Software Developers Guide (including bootgen)
http://www.xilinx.com/support/documentation/user_guides/ug821-zynq-7000-swdev.pdf

Boards
http://www.xilinx.com/zc702
http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm

Release Contents

FSBL
The First Stage Boot Loader (FSBL) used to generate the BOOT.BIN file is based on the 14.3 release of the IDS tools.

u-boot
The release is based on a 2012.04.01 release of u-boot.
More details about configuring, building and running u-boot are located on the Zynq U-boot page.

Linux
The release is based on a 3.5 Linux kernel.
More details about configuring, building and running Linux are located on the Zynq Linux page.

Significant Release Changes

Supported Platforms

The ZC702 and the ZC706 boards are now supported starting in 14.3.

Booting Linux Changes

There are some significant changes to u-boot as it was previously using the go command. Now it is using the bootm command which is more industry standard.
The bootm command requires a uImage for Linux rather than a zImage as u-boot verifies the image before starting it. A uImage is a kernel image that is wrapped with a mkimage (located in the u-boot tree in the tools directory) header. The bootm command also requires a mkimage wrapped ramdisk image as u-boot also verifies this image before starting Linux.
For more details please refer to Zynq u-boot.

SD File Name Changes

The environment of u-boot uses predefined file names for the files which are read from the SD card when booting Linux. The Linux kernel image is now expected to be uImage. It was previously named zImage.
The ramdisk image on the SD card is now expected to be named uramdisk.image.gz. It was previously named ramdisk8M.image.gz. It was renamed to better reflect the fact that it's a mkimage wrapped ramdisk. The name of the ramdisk is also independent of the ramdisk size so that ramdisk size can be changed easier.

Linux Kernel Configuration

The Linux kernel is now configured by default (using xilinx_zynq_defconfig) to not hardcode the location of the device tree at 16 MB. This is more industry standard and works with the bootm command in u-boot. The kernel configuration still (for now) has the ability for a device tree at a fixed location (16MB) but this feature is likely to removed in the near future.

Known Issues

Linux
When flashing images from Linux (not u-boot) most users boot from SD then flash the QSPI flash with images. On the ZC706 board, which uses dual QSPI, the quad enable bit is not getting set in the flash from Linux. This causes the board to not boot in QSPI mode. The solution is to reboot from SD after programming the QSPI in Linux, then stop u-boot and perform the "sf probe" command which fixes the issue. Now the board can be rebooted in QSPI mode.

Release Git Tags

The Xilinx Git repositories, u-boot and linux, are tagged for the release with a tag of xilinx-14.3-build2.

Release Details

Networking
The network is setup to use a static IP address of 192.168.1.10 in the release pre-built images. The network is being configured from the kernel command line rather than using a user space application.
SSH password
SSH is setup on the ramdisk to use root:root as the user:password

Files In Release

The release contains a directory for each board (ZC702, ZC706) with the following files for each board.

File Name	Description
BOOT.BIN	Binary image containing the FSBL and u-boot images produced by bootgen
devicetree.dtb	Device tree binary blob used by Linux, loaded into memory by u-boot
uramdisk.image.gz	u-boot ramdisk image used by Linux, loaded into memory by u-boot
u-boot.elf	u-boot elf file used to create the BOOT.BIN image
uImage	Linux kernel image for u-boot, loaded into memory by u-boot
fsbl.elf	FSBL elf image used to create BOOT.BIN image

All of these files from a board directory can be copied to an SD card (FAT formated) and then used to boot the board. Only BOOT.BIN, devicetree.dtb, uImage, and uramdisk.image.gz are required to boot Linux.

Ramdisk Details

The ramdisk image has been updated such that there may be small visible changes to the user. Dropbear is no longer being used as it was easier to use only Open SSH.