doc: PXE: mention extlinux.conf and sysboot

These use the same format as PXE boot.

Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
Cc: Tom Rini <trini@konsulko.com>
This commit is contained in:
Fiona Klute 2025-06-30 12:53:23 +02:00 committed by Heinrich Schuchardt
parent 773830f4d9
commit 4caf13f9a6

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@ -1,19 +1,22 @@
.. SPDX-License-Identifier: GPL-2.0+
Copyright 2010-2011 Calxeda, Inc.
PXE Boot
========
PXE Boot and extlinux.conf
==========================
The ``pxe`` commands provide a near subset of the functionality
provided by the PXELINUX boot loader. This allows U-Boot based systems
to be controlled remotely using the same PXE based techniques that
many non U-Boot based servers use.
The ``sysboot`` command and Extlinux boot method use the same file
format as PXE boot for ``extlinux.conf``.
Commands
--------
``pxe get``
**syntax:** ``pxe get``
**Syntax:** ``pxe get``
follows PXELINUX's rules for retrieving configuration files
from a tftp server, and supports a subset of PXELINUX's config
@ -30,7 +33,7 @@ Commands
http://syslinux.zytor.com/wiki/index.php/Doc/pxelinux
``pxe boot``
**syntax:** ``pxe boot [pxefile_addr_r]``
**Syntax:** ``pxe boot [pxefile_addr_r]``
Interprets a pxe file stored in memory.
@ -40,6 +43,18 @@ Commands
There are some environment variables that may need to be set,
depending on conditions, see the Environment section below.
``sysboot``
**Syntax:** ``sysboot [-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]``
Load and boot an ``extlinux.conf`` file from a local
filesystem. Paths in the ``extlinux.conf`` file (kernel,
initrd, FDT and overlays) will be interpreted within that
filesystem.
Example:
``sysboot mmc 0.0:2 any ${pxefile_addr_r} /boot/extlinux.conf``
Environment
-----------