![]() ![]() at the end, the file named "default-$CONFIG_SYS_ARCH-$CONFIG_SYS_SOC".IP address of the board and each subnet mask.hardware type and address: ARP type "1" for Ethernet and MAC address.U-Boot searches for a PXE configuration file in the pxelinux.cfg directory in this order: In the configuration file, the menu can have several options (see LABEL, DEFAULT and TIMEOUT commands in README.pxe for details).įor example with STM32MP157C-EV1 Evaluation board :ĪPPEND rootwait rw earlyprintk console=ttySTM0,115200ĪPPEND root= /dev/nfs nfsroot= 192.168.1.1:/nfsroot ip=dhcp rootwait rw earlyprintk console=ttySTM0,115200ĪPPEND root=/dev/mmcblk0p8 rootwait rw earlyprintk console=ttySTM0,115200ĪPPEND root=/dev/mmcblk1p6 rootwait rw earlyprintk console=ttySTM0,115200īecause more than one board may be booted from the same server, the "PXE configuration file" name depends on U-boot parameters (hardware address of the board/IP address). or as NFS mounting point with Linux ® kernel boot arguments nfsroot added in APPEND command ( root= /dev/nfs nfsroot=.as initramfs with INITRD command in configuration file (the file uInitrd need to be generated, it is a generic feature not explained in this WIKI).To fully boot on a network (kernel and rootfs), the rootfs to use can be defined : KERNEL uImage FDT stm32mp157f-ev1.dtb APPEND root= /dev/mmcblk0p8 rootwait rw earlyprintk console=ttySTM0,115200 the Linux ® kernel boot arguments are defined via the APPEND option, including the rootfs to use įor example with STM32MP157F-EV1 Evaluation board and with the rootfs on the 8th partition of the SD card ( /dev/mmcblk0p8), the PXE configuration file is:.the kernel and the device tree loaded by U-Boot are defined via KERNEL and FDT options.the LABEL is a string, for example the boot device such as an e. ![]() More explanations on the name of the file loaded by U-Boot are given in next chapter. The format of the PXE configuration text file is explained in this chapter. U-Boot pxe command loads a PXE configuration file in pxelinux.cfg directory of the TFTP server and parses it.Įach PXE configuration file has same format as the nf file, generated by a standard Yocto distribution. U-Boot follows pxelinux's rules to download from the TFTP server a PXE configuration file located in the pxelinux.cfg directory. The procedure, to install a TFTP server on your PC host, is explained here. Let me know if you have any more questions.The documentation is available in the U-Boot source:Ģ TFTP server installation on host PC You’ll want to configure your bootloader to load the supplemental initramfs containing the supporting files and configuration for network booting. This script will add a hook to the initramfs to setup the network block device (NBD) and tunnel I/O requests over the network. balena-io-experimental/initramfs-toolkit.Previously, I’ve chosen NBD, and I have an example prepared you can use as a reference: initramfs-toolkit/run.sh at master For reference, here’s the official documentation from the Pi Foundation about how to network boot the Pi: Raspberry Pi Documentation - Raspberry Pi hardwareĪfter the kernel is loading over the network, you’ll want to mount your root filesystem over NBD or NFS. The netboot provisioner project can serve as a reference, but you’ll need to customize this to work as you wish. You’ll want to network boot your Pi by setting up a DHCP and TFTP server along with the firmware necessary to boot the Pi, as well as the kernel to run balenaOS. ![]()
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