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

本文主要是介绍EBAZ4205 ZYNQ 7Z010 u-boot & Linux 生成方法记录，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

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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