File:  [NetBSD Developer Wiki] / wikisrc / projects / project / u-boot-ffs.mdwn
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Sat Aug 25 00:58:25 2018 UTC (4 years, 3 months ago) by maya
Branches: MAIN
CVS tags: HEAD
Mark as done by berte.
Tree up at
Also, alternatively:

[[!template id=project

title="Add FFS support to U-Boot"


[Jared McNeill](

duration="3 months"


Add support for reading files from a BSD Fast File System from within U-Boot. Typically, on ARM boards where we boot NetBSD with U-Boot we require the kernel to live on an MSDOS or Linux Ext2/3/4 file-system. It would be nice if we could load a kernel directly from FFSv1 or FFSv2 instead.

This project requires access to an ARM board that is supported by mainline U-Boot and NetBSD.


[Work in progress by berte](


* Add an ffs driver to U-Boot (read-only)
* Add the following commands to U-Boot: *ffssize*, *ffsload*, *ffsls*
* Integrate changes with existing U-Boot packages (sysutils/u-boot*) in pkgsrc
* Update armv7.img to support booting directly from FFS.
* Modify sysinst to allow for installation without an MSDOS partition.
  * Some of this will be SoC-specific. Need to detect the SoC type and select the correct kernel/dtb and adjust partition layout to not interfere with U-Boot / SoC specific bootloaders.

**Extended goals:**

* Add write support to the U-Boot ffs driver
* Add an *ffswrite* command
* Compatibility with FreeBSD UFS
* Submit U-Boot FFS driver for inclusion with mainline U-Boot


* [NetBSD libsa (standalone) UFS driver](
* [U-Boot fstype_info struct](


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