U BOOT TFTPBOOT SERIAL
the USB serial console which provides a root session, or.This needs to be done within a session on ( one of) the Parallella using: Once fully set up and running, the root filesystem will need to be managed and maintained as normal, (e.g. The NFS directories are available for viewing (and editing) on the NFS Server host. Some minor edits to the configuration files are usually needed to ensure that the NFS variant works smoothly in a network environment. Similar steps need to be taken to create the root filesystem contents of the NFS mounted directories - but the process is (usually) much quicker and more flexible. The instructions are then repeated for each physical SD card required for each Parallella in a cluster. The Official (and Unofficial) sources of Linux root filesystems for the Parallella provide instructions for extracting and 'burning' the contents to SD card. Note: The image files follow the same naming convention as for SD card booting. Test_new_kernel/ // boot mode = temp testing variation Headless_7010/ // boot mode = Zynq 7010 Parallella configured as headless Hdmi_7010/ // boot mode = Zynq 7010 with HDMI support The TFTP service directory layout (for this example) will look something like: hdmi_7010įollow the instructions for creating the SD card (download, extract and rename the kernel uImage, and devicetree.dtb files) but instead of 'burning' to a SD card simply copy the image files to the boot mode directory (as root). ).Ĭreate a Boot Mode Directory and Prepare the Image Files sudo mkdir -p /srv/tftp/ // replace with boot mode, e.g.A breakdown of the bootscript to show different options.Use of mkimage to convert the bootscript text file into a U-Boot script image file.An example bootscript for TFTP boot and NFS root filesystem.Changing the U-Boot boot command to fetch a small bootscript file using TFTP.Setting up NFS and a directory layout for NFS root filesystems, allowing a choice of root filesystems for each Parallella.in the U-Boot 'bootargs' rather than devicetree. Changing the way the boot arguments are passed to the kernel, i.e.Setting up TFTP and a directory layout for TFTP bootscripts and boot mode image files.An IP addressing and naming scheme using DHCP to support different boot modes (headless, HDMI) and NFS root filesystems.Linux PC, Parallella board(s), USB to Serial (TTL/UART) adapter, DHCP server. Tweak the example below to suit your needs. The many advantages include saving space on the server, and mainly(!) not having to replicate SD cards for each cluster member.Ĭloning and modifying the NFS directories for use by other Parallellas is also easier and quicker: just copy directories on the NFS Server (and perhaps edit a couple of files). Shared root filesystems: A root filesystem directory on the NFS server may also be shared by a number of Parallellas, say, in a cluster. Ubuntu, Linaro Nano, with/without SDK) are just like 'burning' and booting from multiple SD cards.
U BOOT TFTPBOOT HOW TO
The following is based on the original blog post by Scott Johnson describing how to set up a Parallella cluster to use TFTP/NFS, but has been tweaked - mainly to minimise the need to edit/update the U-Boot variables via the Serial/UART cable, and provide more flexibility by using PC-based editors and storage.īy editing a bootscript on the TFTP server (and re-booting), a Parallella can be re-configured to a different boot mode (headless,HDMI) and/or different root filesystem (Ubuntu, Debian, nano) - all without having to 'burn' another Parallella SD card (perhaps ever.?).Īlternative root filesystems: A Parallella may have alternative Linux root filesystems, holding different configurations or versions.
U BOOT TFTPBOOT MANUAL
This Guide describes how to set up the Parallella U-Boot to network boot using TFTP.Īlso, it describes how to set up mounting a root filesystem ( rootfs) via NFS, so that a Parallella is run as a 'Thick Client'.įor background to the TFTP Boot in U-Boot, see the Manual for Das U-Boot How To Set Up TFTP Boot And NFS Root Filesystems On Parallella 4.3 Set up Contents of the Parallella NFS Root Filesystems.3.3 Create a Boot Mode Directory and Prepare the Image Files.1 How To Set Up TFTP Boot And NFS Root Filesystems On Parallella.
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