Xilinx的开发工具SDK/Vitis都可以自动根据Vivado设计，创建软件工程，自动配置各个外部设备的驱动程序。为了兼容旧版本工程，SDK/Vitis里提供了多个IP版本的驱动程序。如果在SDK/Vitis的软件工程里查看代码，驱动程序都是正确的。

如果没有工程，也可以在安装目录下查看代码，比如目录Vitis\2020.2\data\embeddedsw\XilinxProcessorIPLib\drivers。这时候，需要自己选择对应的版本。

第三方源代码编辑器，比如Source Insight，可以创建自己的工程，查找所有符号表等。由于有多个IP版本的驱动程序，只能手动添加对应IP的驱动，到Source Insight工程。否则Source Insight能找到函数的多个实现，看起来有些麻烦。SDK/Vitis下大约有200个软件模块，全部手动添加的话，比较麻烦。

为了避免上述情况，可以把旧版本的驱动程序删除。手动删除旧版本，也比较繁琐，也容易出错。犹豫很久后，终于写了一个Linux脚本，自动删除SDK/Vitis下驱动程序的旧版本。当然，在删除之前，请做好备份。万一需要的情况下，需要恢复。如果是Linux环境，可以直接执行这个Linux脚本；如果是Windows环境，可以借助WSL执行。 SDK/Vitis在下列目录，有多个版本的驱动。 请在下列目录执行脚本。

Vitis/2020.2/data/embeddedsw/XilinxProcessorIPLib/drivers
Vitis/2020.2/data/embeddedsw/ThirdParty/sw_services
Vitis/2020.2/data/embeddedsw/ThirdParty/bsp
Vitis/2020.2/data/embeddedsw/ThirdParty/sw_services
Vitis/2020.2/data/embeddedsw/lib/sw_services 
Vitis/2020.2/data/embeddedsw/lib/bsp

脚本如下：

#!/bin/bash
# Author: hankf@xilinx.com
# 2021-07-28
# 
# Run this script in 
# Linux : 
# WSL on Windows: 
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/XilinxProcessorIPLib/drivers
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/ThirdParty/sw_services
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/ThirdParty/bsp
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/ThirdParty/sw_services
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/lib/sw_services 
# /mnt/c/Xilinx/Vitis/2020.2/data/embeddedsw/lib/bsp
 
function del_old_dir(){
    echo "IP base name $1"

    for main_version in {1..10}
    do
        ip_dir_name_main="$1_v$main_version"
        # echo  "Directory main version: $ip_dir_name_main"

        # IP directory example： zdma_v1_12
        for sub_version in {0..20}
        do
            ip_dir_name_main_sub=$ip_dir_name_main\_$sub_version
            # echo  "Check IP Directory main_sub version $ip_dir_name_main_sub"

            if test -d $ip_dir_name_main_sub
            then
                # echo  "Directory $ip_dir_name_main_sub exists"
                # echo  "IP Directory length: ${#ip_dir_name_main_sub} "

                if [ ${#ip_dir_name_main_sub} -gt 5 ]; then
                    ip_dir_name_main_sub_latest=$ip_dir_name_main_sub
                    echo  "Update IP Directory: $ip_dir_name_main_sub_latest"
                fi

            fi
        done
    done


    echo  "Latest IP Directory: $ip_dir_name_main_sub_latest"    

    if [ "$ip_dir_name_main_sub_latest" = "" ]; then
        echo  "Latest IP Directory is null."  
        return 0
    fi

    if [ -d $ip_dir_name_main_sub ]; then
        echo  "Latest IP Directory: $ip_dir_name_main_sub_latest does not exist."  
        return 0
    fi

    for main_version in {1..10}
    do
        ip_dir_name_main="$1_v$main_version"
        # echo  "Directory main version: $ip_dir_name_main"

        for sub_version in {0..20}
        do
            ip_dir_name_main_sub=$ip_dir_name_main\_$sub_version
            # echo  "Check IP Directory main_sub version $ip_dir_name_main_sub"

            if test -d $ip_dir_name_main_sub
            then

                if [ "$ip_dir_name_main_sub" == "\\" ]; then
                    # double check it is not root direcoty.
                    echo  "Error: IP Directory: $ip_dir_name_main_sub is root directory."
                    exit
                fi

                # echo  "IP Directory: $ip_dir_name_main_sub length: ${#ip_dir_name_main_sub}"
                if [ ${#ip_dir_name_main_sub} -lt 5 ]; then
                    # double check it is correct
                    echo  "Error: IP Directory: $ip_dir_name_main_sub is too short: ${#ip_dir_name_main_sub}"
                    exit
                fi

                if [ $ip_dir_name_main_sub != $ip_dir_name_main_sub_latest ]; then
                    # Delete IP Directory: dangerous
                    echo  "Delete old IP Directory: $ip_dir_name_main_sub"
                    rm -rf ./$ip_dir_name_main_sub/*
                    rmdir ./$ip_dir_name_main_sub
                fi
            fi
        done
    done

}


function get_sub_dir(){

    check_dir=$1
    # echo  "Check Directory: $check_dir"

        if test -d $check_dir
        then
            echo  "Check Directory: $check_dir"
            ip_dir_base_name=${check_dir%%_v[0-9]_*}
            # echo  "IP Directory Base name: $ip_dir_base_name"

            ip_dir_base_name_rmv_slash=${ip_dir_base_name:2}
            echo  "IP Directory Base name without slash: $ip_dir_base_name_rmv_slash"

            if [ "$1" != "" ]; then
                del_old_dir $ip_dir_base_name_rmv_slash
            fi
        fi
}


function getdir(){
    echo $1

    current_dir_name=`pwd`
    echo  "Current Directory: $current_dir_name"

    # Make sure it is not in wrong directory.
    # echo  "Current Directory length: ${#current_dir_name} "
    if [ ${#current_dir_name} -lt 10 ]; then
        echo  "Current Directory is too short: $current_dir_name"
        echo  "Please enter into Xilinx Vitis directory."
        return 0;
    fi

    xilinx_result=$(echo $current_dir_name | grep Xilinx)
    if [ "$xilinx_result" == "" ]; then
        echo  "Current Directory does not includes Xilinx."
        echo  "Please enter into Xilinx Vitis directory."
        return 0;
    else
        echo  "Current Directory includes Xilinx."
    fi

    vitis_result=$(echo $current_dir_name | grep Xilinx)
    if [ "$vitis_result" == "" ]; then
        echo  "Current Directory does not includes Vitis."
        echo  "Please enter into Xilinx Vitis directory."
        return 0;
    else
        echo  "Current Directory includes Vitis."
    fi
     
    for sub_dir in $1/*
    do
        get_sub_dir $sub_dir
    done
}

getdir .