EBAZ4205 ZYNQ 7Z010 u-boot & Linux 生成方法记录

2022/2/11 7:16:33

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上一篇文章介绍了EBAZ4205如何裸机固化,从NAND启动,并生成了.bit和fsbl.elf文件。本文记录如何生成u-boot & Linux。注意:在这之前需要移动电阻将zynq改为从SD卡启动。


使用vivado/Xilinx SDK生成.bit和fsbl.elf

上一篇文章生成的.bit和fsbl.elf并没有使用到所有的硬件。重新配置ZYNQ后产生FPGA下载文件:.bit和first stage bootloader:fsbl.elf,留着备用。除此之外还会产生 .hdf(.xsa)硬件描述文件。.hdf文件主要用于给petalinux自动生成镜像,本文不使用petalinux的全自动镜像生成功能,而是下载u-boot和linux源码手动编译。


在ubuntu16.04环境编译 u-boot & Linux

  1. ubuntu必须是16.04版本,本文使用ubuntu-16.04.4-desktop-amd64.iso

  2. 安装petalinux依赖

    sudo apt-get install tofrodos iproute2 gawk gcc g++ git make net-tools libncurses5-dev \
    tftpd zlib1g:i386 libssl-dev flex bison libselinux1 gnupg wget diffstat chrpath socat \
    xterm autoconf libtool tar unzip texinfo zlib1g-dev gcc-multilib build-essential \
    libsdl1.2-dev libglib2.0-dev screen pax gzip automake
    
  3. 在Xilinx官网下载 petalinux-v2018.3-final-installer.run 。这里统一采用v2018.3版本(petalinux、u-boot-xlnx、linux-xlnx),不同版本不要交叉使用。v2019.1之后的版本不带交叉编译器,需要安装VIVADO。

    #安装petalinux到petalinux-v2018.3目录
    ./petalinux-v2018.3-final-installer.run ./petalinux-v2018.3
    
  4. 下载 xilinx uboot https://github.com/Xilinx/u-boot-xlnx/archive/refs/tags/xilinx-v2018.3.zip

    下载 xilinx linux内核 https://github.com/Xilinx/linux-xlnx/archive/refs/tags/xilinx-v2018.3.zip

    解压到当前目录,先进入u-boot-xlnx-xilinx-v2018.3目录:

    touch run.sh
    chmod a+x run.sh
    vi run.sh
    

    添加以下脚本:

    #!/bin/bash
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zynq_ebaz4205_defconfig
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j8
    mv u-boot u-boot.elf
    echo the_ROM_image: \
    { \
       [bootloader]./fsbl.elf \
       ./top_pl.bit \
       ./u-boot.elf \
    } > boot.bif
    bootgen -image boot.bif -o i BOOT.bin -w
    
  5. 增加ebaz4205配置文件

    u-boot支持设备树。添加设备树 zynq-ebaz4205.dts到 ./arch/arm/dts/: 。注意:最新版本的Linux内核已经添加了EBAZ4205的设备树文件,但本次采用的v2018.3版本会出现zynq-7000.dtsi兼容问题遂不采用。文件内容:

       // SPDX-License-Identifier: GPL-2.0+
    /*
    *  Copyright (C) 2011 - 2015 Xilinx
    *  Copyright (C) 2012 National Instruments Corp.
    */
    /dts-v1/;
    #include "zynq-7000.dtsi"
    //  /include/ "zynq-7000.dtsi"
    / {
       model = "Ebang EBAZ4205";
       compatible = "ebang,ebaz4205", "xlnx,zynq-7000";
    
       aliases {
          ethernet0 = &gem0;
          serial0 = &uart1;
          mmc0 = &sdhci0;
       };
    
       memory@0 {
          device_type = "memory";
          reg = <0x0 0x10000000>;
       };
    
       chosen {
          bootargs = "";
          stdout-path = "serial0:115200n8";
       };
    
       gpio-keys {
          compatible = "gpio-keys";
          autorepeat;
    
          s2 {
                label = "s2";
                gpios = <&gpio0 20 1>;
                linux,code = <102>;
                wakeup-source;
                autorepeat;
          };
    
          s3 {
                label = "s3";
                gpios = <&gpio0 32 1>;
                linux,code = <116>;
                wakeup-source;
                autorepeat;
          };
       };
    };
    
    &clkc {
       ps-clk-frequency = <33333333>;
    };
    
    &gem0 {
       status = "okay";
       phy-mode = "mii";
       phy-handle = <&phy>;
    
       /* PHY clock */
       assigned-clocks = <&clkc 18>;
       assigned-clock-rates = <25000000>;
    
       phy: ethernet-phy@0 {
          reg = <0>;
       };
    };
    
    &smcc {
       status = "okay";
    };
    
    &nand0 {
       status = "okay";
       pinctrl-names = "default";
       pinctrl-0 = <&pinctrl_nand0_default>;
       partition@0 {
          label = "nand-fsbl-uboot";
          reg = <0x0 0x300000>;
       };
       partition@1 {
          label = "nand-linux";
          reg = <0x300000 0x500000>;
       };
       partition@2 {
          label = "nand-device-tree";
          reg = <0x800000 0x20000>;
       };
       partition@3 {
          label = "nand-rootfs";
          reg = <0x820000 0xa00000>;
       };
       partition@4 {
          label = "nand-jffs2";
          reg = <0x1220000 0x1000000>;
       };
       partition@5 {
          label = "nand-bitstream";
          reg = <0x2220000 0x800000>;
       };
       partition@6 {
          label = "nand-allrootfs";
          reg = <0x2a20000 0x4000000>;
       };
       partition@7 {
          label = "nand-release";
          reg = <0x6a20000 0x13e0000>;
       };
       partition@8 {
          label = "nand-reserve";
          reg = <0x7e00000 0x200000>;
       };
    };
    
    &pinctrl0 {
       pinctrl_nand0_default: nand0-default {
          mux {
                groups = "smc0_nand8_grp";
                function = "smc0_nand";
          };
    
          conf {
                groups = "smc0_nand8_grp";
                bias-pull-up;
          };
       };
    
       pinctrl_uart1_default: uart1-default {
          mux {
                groups = "uart1_4_grp";
                function = "uart1";
          };
    
          conf {
                groups = "uart1_4_grp";
                slew-rate = <0>;
                io-standard = <3>;
          };
       };
    };
    
    &sdhci0 {
       u-boot,dm-pre-reloc;
       status = "okay";
    };
    
    &uart1 {
       u-boot,dm-pre-reloc;
       status = "okay";
       pinctrl-names = "default";
       pinctrl-0 = <&pinctrl_uart1_default>;
    };
    
  6. 参考zynq_zc702_defconfig 添加 zynq_ebaz4205_defconfig

    cp configs/zynq_zc702_defconfig  configs/zynq_ebaz4205_defconfig
    gedit zynq_ebaz4205_defconfig
    

    删除:

    CONFIG_ENV_IS_IN_SPI_FLASH=y.

    修改:

    CONFIG_SYS_CONFIG_NAME=“zynq_ebaz4205”

    CONFIG_IDENT_STRING=" Xilinx Zynq EBAZ4205"

    CONFIG_DEFAULT_DEVICE_TREE=“zynq-ebaz4205”

    CONFIG_DEBUG_UART_BASE=0xe0001000

    增加:

    CONFIG_NAND=y

    CONFIG_NAND_ZYNQ=y

    CONFIG_BOOTDELAY=3

    CONFIG_DEFAULT_DEVICE_TREE对应之前新增的设备树名,CONFIG_DEBUG_UART_BASE=0xe0001000说明使用uart1(个人猜测fsbl对fpga配置完成后,uart1 ip就连上了特定的mio/emio,只要告诉uboot,使用uart1的地址而不是uart0)

  7. 增加头文件

    cp include/configs/zynq_zc70x.h include/configs/zynq_ebaz4205.h
    

    增加: #define CONFIG_CPU_FREQ_HZ 666666667

  8. gedit arch/arm/mach-zynq/Kconfig 改动点如下:

    config SYS_CONFIG_NAME
       string "Board configuration name"
       default "zynq_ebaz4205"
    
  9. petalinux工具需要使用bash。

    sudo dpkg-reconfigure dash
    

    出现对话框选择no

  10. 把之前.bit和.elf文件复制到当前目录,名字改为top_pl.bit fsbl.bit

    # 设置petalinux编译器环境变量
    source ../petalinux-v2018.3/settings.sh
    ./run.sh
    

    产生BOOT.bin和devicetree.dtb

  11. 进入linux-xlnx-xilinx-v2018.3目录执行

    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xilinx_zynq_defconfig
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j8
    cp ./arch/arm/zImage ./
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- UIMAGE_LOADADDR=0x8000 uImage
    cp ./arch/arm/uImage ./
    

    产生./arch/arm/zImage

    产生./arch/arm/uImage

  12. 新建 uEnv.txt 定制启动命令

    bootargs=console=ttyPS0,115200 root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait
    uenvcmd=run linaro_sdboot
    linaro_sdboot=echo Run uEnv.txt copying Linux from SD to RAM... && \
    fatload mmc 0 0x0 ${devicetree_image} && \
    fatload mmc 0 0x8000 ${kernel_image} && \
    if fatload mmc 0 0x1000000 ${ramdisk_image}; \
    then bootm 0x8000 0x1000000 0x0; \
    else bootm 0x8000 - 0x0; fi
    
  13. 将以下文件放入fat32分区的SD卡就可以启动了,uboot默认识别devicetree.dtb、uImage、uEnv.txt文件名

    BOOT.bin
    devicetree.dtb
    uImage
    uEnv.txt 
    
  14. 进入Linux后会报根文件系统挂载错误。下载一个根文件系统解压到SD卡的ext4分区就可以启动了。

    linaro-precise-ubuntu-desktop-20120723-305.tar.gz



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