海思开发笔记：（五）海思Hi3519A通过网络启动

1、安装tftp服务

apt-get install tftpd-hpa
vi /etc/default/tftpd-hpa

TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/home/hisilicon/3519A/tftp"
TFTP_ADDRESS=":69"
TFTP_OPTIONS="-l -c -s"

chmod 777 /home/hisilicon/3519A/tftp

service tftpd-hpa restart

将前面编译好的内核镜像拷备至tftp根目录

2、安装nfs服务

apt install nfs-kernel-server

vi /etc/exports
# 发布根文件系统所在目录
/home/hisilicon/3519A/nfs *(rw,sync,no_root_squash,no_subtree_check)

service nfs-kernel-server restart

# 查看nfs状态及支持的版本
nfsstat

Server rpc stats:
calls      badcalls   badfmt     badauth    badclnt
6638       6          6          0          0       

Server nfs v3:
null             getattr          setattr          lookup           access           
2         0%     593       8%     7         0%     1065     16%     366       5%     
readlink         read             write            create           mkdir            
42        0%     4092     61%     47        0%     199       3%     7         0%     
symlink          mknod            remove           rmdir            rename           
0         0%     0         0%     2         0%     0         0%     198       2%     
link             readdir          readdirplus      fsstat           fsinfo           
0         0%     0         0%     2         0%     0         0%     2         0%     
pathconf         commit           
1         0%     6         0%

3、通过串口修改uboot启动配置，使用网络启动

setenv serverip 192.168.1.7;setenv ipaddr 192.168.1.100;setenv gatewayip 192.168.1.1;setenv netmask 255.255.255.0
setenv bootcmd 'mw.b 42000000 ff 400000;tftp 42000000 uImage;bootm 0x42000000'
setenv bootargs 'mem=256M console=ttyAMA0,115200 root=/dev/nfs rw nfsroot=192.168.1.7:/home/hisilicon/3519A/nfs/rootfs,v3,proto=tcp ip=192.168.1.100 init=/linuxrc'
saveenv
reset

注意：使用ubuntu18.04安装的nfs默认支持nfs v3，在设置bootargs时需要指定nfs版本，否则从nfs挂载根文件系统时会报错：random: fast init done
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
启动完成后会有一条没有启动脚本的错误提示：can't run '/etc/init.d/rcS': No such file or directory
Please press Enter to activate this console.
敲回车键后可正常进入控制台