[U-Boot] Add filesystem support
Hi all, I would say in advance: I am a new bye in the world of boot loader, and I can say things which does not make sense, after all I am here to ask !! :-)
I am working on an embedded system which we would like upgrade using a new filesystem YAFFS2 instead of the old JFFS2, we actually mount the JFFS2 partition from U-Boot and then we start the kernel. I looked in the boot source tree we actually use and I did not find YAFFS2 (or UBIFS ..) under the fs/ folder, then I assume I don't have it. I'd like add that support without update the whole uboot source tree, is it possible or is too much complicated ?
Thanks in advance,
Pietro.
Dear Pietro Paolini,
In message 51C80AA5-303E-4737-864C-6D05577D19E7@aol.com you wrote:
I am working on an embedded system which we would like upgrade using a new filesystem YAFFS2 instead of the old JFFS2, we actually mount the JFFS2 partition from U-Boot and then we start the kernel. I looked in the boot source tree we actually use and I did not find YAFFS2 (or UBIFS ..)
Hm... I recommend to look at the mailine U-Boot tree instead:
-> ls fs Makefile cbfs cramfs ext4 fat fdos fs.c jffs2 reiserfs sandbox ubifs yaffs2 zfs
under the fs/ folder, then I assume I don't have it. I'd like add that support without update the whole uboot source tree, is it possible or is too much complicated ?
This depends a lot on which exact version of U-Boot you are running now, but given the fact that you see neither yaffs2 nor ubifs it appears to be _very_ old, so you're probably out of luck.
On the other hand - switching to mainline code is usually a very good idea anyway, so go for that.
Best regards,
Wolfgang Denk
On Apr 23, 2013, at 5:54 PM, Wolfgang Denk wd@denx.de wrote:
Dear Pietro Paolini,
In message 51C80AA5-303E-4737-864C-6D05577D19E7@aol.com you wrote:
I am working on an embedded system which we would like upgrade using a new filesystem YAFFS2 instead of the old JFFS2, we actually mount the JFFS2 partition from U-Boot and then we start the kernel. I looked in the boot source tree we actually use and I did not find YAFFS2 (or UBIFS ..)
Hm... I recommend to look at the mailine U-Boot tree instead:
-> ls fs Makefile cbfs cramfs ext4 fat fdos fs.c jffs2 reiserfs sandbox ubifs yaffs2 zfs
under the fs/ folder, then I assume I don't have it. I'd like add that support without update the whole uboot source tree, is it possible or is too much complicated ?
This depends a lot on which exact version of U-Boot you are running now, but given the fact that you see neither yaffs2 nor ubifs it appears to be _very_ old, so you're probably out of luck.
On the other hand - switching to mainline code is usually a very good idea anyway, so go for that.
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "You'll pay to know what you really think." - J.R. "Bob" Dobbs
Hello Wolfgang, thank you so much. I have got another question :-)
If I see under the fs/ the yaffs2/ and the ubifs/ folders I can assume that I can read and write them from uboot or there are some limitations like I can read but I can't write ? In the U-Boot website I was not able to find a list of filesystem supported, my fault I guess.
Best Regards, Pietro.
Dear Pietro,
In message 31AFEC52-AD37-4385-B8A1-06F6C51C9654@aol.com you wrote:
If I see under the fs/ the yaffs2/ and the ubifs/ folders I can assume that I can read and write them from uboot or there are some limitations like I can read but I can't write ? In the U-Boot website I was not able to find a list of filesystem supported, my fault I guess.
Most file systems are supported read-only in U-Boot.
Yaffs2 includes write support in U-Boot, ubifs does not.
Best regards,
Wolfgang Denk
participants (2)
-
Pietro Paolini -
Wolfgang Denk