[Yaffs-archive] YAFFS image (mkyaffsimage) support

[Chris]

Hi,

I started using YAFFS on an embedded device about 2 weeks ago.  It has
gone smoothly except for a few small problems.  Can anyone provide
advice on some issues I've had?

I've got the YAFFS driver working on our kernel (PPC linux 2.4.21-pre2).
I've mounted a YAFFS partition, used the utilities to format the
partition, copied a root filesystem to the partition and booted the root
filesystem from that partition.

I've also tried the mkyaffsimage utility but have not had any success
using that yet.  I think that I might have endian problems (use x86
mkyaffsimage to build the filesystem).  The device itself is big endian
(PPC 405EP embedded processor).  Has anyone had the YAFFS code working
on a big endian platform?  

At this point I'm trying to write code in the bootloader to flash a
YAFFS filesystem to a NAND partition.  I've looked at the image produced
by mkyaffsimage.  It appears to be of the following format:
+-----------------+
+                 +
+  512 bytes      +
+   IN band       +
+                 +
+-----------------+
+  16 bytes OOB   +
+-----------------+
I haven't found any documentation on what is needed to integrate the
YAFFS support (just flashing the filesystem), into the bootloader.
Using an image created by mkyaffsimage can I do the following:  Can I
write the pages/blocks out of order?  Is there any modifications
required to the OOB or will a straight copy of the pages/blocks and OOB
into the NAND flash work?


Regards,

Chris Sperandeo


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