Rockpi4/dev/u-boot/pxe
ROCK Pi 4 > Development > U-boot > PXE BOOT
PXE boot, Preboot eXecution Environment is a specification describes a standardized client-server environment that boots a software assembly, retrieved from a network. U-boot of ROCK Pi 4 supports PXE boot and it's enabled by default. This page describe how to use PXE boot on ROCK Pi 4.
Contents
Server setting
this document is used tftp server to test pxe boot to ramdisk,next,we will instruct on installing and configuring the tftp server in ubuntu 16.04LTS,and preparing some boot files.
Step 1: Install TFTP and TFTP server
sudo apt-get install tftp-hpa tftpd-hpa
Step 2: Configure TFTP server
1.Create a folder,like this:
mkdir /data/tftp_server
2.modify configuration file,like this:
$ cat /etc/default/tftpd-hpa # /etc/default/tftpd-hpa TFTP_USERNAME="tftp" TFTP_DIRECTORY="/data/tftp_server" TFTP_ADDRESS="0.0.0.0:69" TFTP_OPTIONS="-l -c -s"
Step 3: Restart tftp
service tftpd-hpa restart
Step 4:Preparing boot file
copy all files from debian os boot partition,as follows:
#:/data/tftp_server$ tree . ├── config-4.4.154-88-rockchip-00030-g90239a6 //copy from debian ├── dtbs //.dtb file,we need rockpi-4b-linux.dtb,copy from debian │ └── 4.4.154-88-rockchip-00030-g90239a6 │ └── rockchip │ ├── ficus-linux.dtb │ ├── px30-evb-ddr3-lvds-v10.dtb . . . │ └── rockpi-4b-linux.dtb ├── extlinux //copy from debian │ ├── extlinux.conf ├── hw_intfc.conf //copy from debian ├── initrd.img-4.4.154-88-rockchip-00030-g90239a6 //ramdisk,copy from debian ├── overlays //.dtbo files,copy from debian │ ├── at24c02.dtbo │ ├── console-on-ttyS2.dtbo │ ├── console-on-ttyS4.dtbo . . . │ ├── spi1-waveshare35c.dtbo │ └── two-color-led.dtbo ├── pxelinux.cfg //this folder is important,you can make the folder by yourself │ ├── 01-be-73-e6-4e-04-2b //named it by env ethaddr of uboot.i will introduce this file │ └── extlinux.conf └── vmlinuz-4.4.154-88-rockchip-00030-g90239a6 //this is a kernel image,copy from debian or build by yourself
Pxelinux.cfg
named pxe configaration file,run to uboot and print ethaddr:
...
hclk_perilp1 100000 KHz
pclk_perilp1 50000 KHz
Net: eth0: ethernet@fe300000
Hit key to stop autoboot('CTRL+C'): 0
=> print ethaddr
ethaddr=be:73:e6:4e:04:2b
so i named my pxe configaration file 01-be-73-e6-4e-04-2b,or you can named it default
:/data/tftp_server/pxelinux.cfg$ cat 01-be-73-e6-4e-04-2b
label kernel-4.4.154-88-rockchip-00030-g90239a6
kernel /vmlinuz-4.4.154-88-rockchip-00030-g90239a6 //choose your kernel image
devicetreedir /dtbs/4.4.154-88-rockchip-00030-g90239a6 //choose your dtb folder
initrd initrd.img-4.4.154-88-rockchip-00030-g90239a6 //choose your ramdisk
append earlycon=uart8250,mmio32,0xff1a0000 swiotlb=1 coherent_pool=1m earlyprintk console=ttyFIQ0,1500000n8 rw root=PARTUUID=b921b045-1d rootfstype=ext4 init=/sbin/init rootwait //this is bootargs for kernel
Rock Pi 4
we must install uboot on spi flash or emmc or microSD,this document is used spi flash,so please see spi-install to install uboot in spi flash
Step 1: Configure ip addr
enter uboot,and set some env:
=> setenv ipaddr xx.xx.xx.xx //set rockpi4 ip => setenv serverip xx.xx.xx.xx //set ip of tftp
Step 2: run pxe boot cammand
when you run pxe cammand,uboot will get some boot files from your tftp server.as follows:
=>pxe get
missing environment variable: pxeuuid
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/01-be-73-e6-4e-04-2b
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename 'pxelinux.cfg/01-be-73-e6-4e-04-2b'.
Load address: 0x600000
Loading: #
391.6 KiB/s
done
Bytes transferred = 401 (191 hex)
Config file found
=> pxe boot
missing environment variable: bootfile
Retrieving file: /hw_intfc.conf
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename '/hw_intfc.conf'.
Load address: 0x700000
Loading: #
840.8 KiB/s
done
Bytes transferred = 1722 (6ba hex)
dtoverlay number: 0, name:/overlays/console-on-ttyS2.dtbo
hw_conf.valid = 1
hw_conf.pwm0 = 0
hw_conf.pwm1 = 0
hw_conf.uart2 = 0
hw_conf.uart4 = 0
hw_conf.spi1 = 0
hw_conf.spi2 = 0
hw_conf.i2c2 = 0
hw_conf.i2c6 = 0
hw_conf.i2c7 = 0
hw_conf.dts_overlay_count = 1
hw_conf.dts_overlay[0] = /overlays/console-on-ttyS2.dtbo
1: kernel-4.4.154-88-rockchip-00030-g90239a6
missing environment variable: bootfile
Retrieving file: initrd.img-4.4.154-88-rockchip-00030-g90239a6
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename 'initrd.img-4.4.154-88-rockchip-00030-g90239a6'.
Load address: 0xa200000
Loading: ########......
##################
5.2 MiB/s
done
Bytes transferred = 4072215 (3e2317 hex)
missing environment variable: bootfile
Retrieving file: /vmlinuz-4.4.154-88-rockchip-00030-g90239a6
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename '/vmlinuz-4.4.154-88-rockchip-00030-g90239a6'.
Load address: 0x280000
Loading: ################# ......
########################
5 MiB/s
done
Bytes transferred = 19427336 (1287008 hex)
append: earlycon=uart8250,mmio32,0xff1a0000 swiotlb=1 coherent_pool=1m earlyprintk console=ttyFIQ0,1500000n8 rw root=PARTUUID=b921b045-1dt
missing environment variable: bootfile
Retrieving file: /dtbs/4.4.154-88-rockchip-00030-g90239a6/rockchip/rockpi-4b-linux.dtb
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename '/dtbs/4.4.154-88-rockchip-00030-g90239a6/rockchip/rockpi-4b-linux.dtb'.
Load address: 0x8300000
Loading: #######
5 MiB/s
done
Bytes transferred = 93561 (16d79 hex)
fdt addr 0000000008300000
fdt magic number edfe0dd0
fdt size 1048576
merge_dts_overlay
missing environment variable: bootfile
Retrieving file: /overlays/console-on-ttyS2.dtbo
Speed: 1000, full duplex
Using ethernet@fe300000 device
TFTP from server 192.168.2.140; our IP address is 192.168.2.205
Filename '/overlays/console-on-ttyS2.dtbo'.
Load address: 0x8200000
Loading: #
755.9 KiB/s
done
Bytes transferred = 774 (306 hex)
overlay dtb(0x0000000008200000) is valid
fdt_overlay_apply 0000000008300000 0000000008200000
## Flattened Device Tree blob at 08300000
Booting using the fdt blob at 0x8300000
Loading Ramdisk to e99e3000, end e9dc5317 ... OK
Loading Device Tree to 00000000e98e0000, end 00000000e99e2fff ... OK
Adding bank: 0x00200000 - 0xf8000000 (size: 0xf7e00000)
Total: 717296.593 ms
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Initializing cgroup subsys cpuset
and now,your kernel is booting up