[UPDATE] DOCBoot support for NFTL-based DOC2000

Zeri Virgo zerivirgo at infocell-its.com
Tue Apr 5 08:00:21 EDT 2005

Dan Brown wrote:
> A recent modification to support variable-sized
> ecc_calc and ecc_code arrays didn't take into account the possibility of 
> NULL oobsel.  Fixed in CVS.
> Let me know if DOCBoot finally works for you, please!

OK... diskonchip probing was fine with a fresh chip. Here's what I've

Built a kernel with MTD etc linked in (temporarily including hard-disk
stuff) and verified booting it from the hard-disk (obviously the 
diskonchip driver doesn't show the firmware partition, but that's ok).

Used M-Systems dformat (from tffs_5.1.4_DOS_TOOLS.zip) to resize the
firmware area
     A:\> DFORMAT /WIN:D000 /BDKL0:2M

Rebooted into a kernel with modules and ran
     # modprobe diskonchip show_firmware_partition=1
     # cat /proc/mtd
dev:    size   erasesize  name
mtd0: 04000000 00004000 "DiskOnChip 2000 (NFTL Model)"
mtd1: 00208000 00004000 " DiskOnChip Firmware / Media Header partition"
mtd2: 03df8000 00004000 " DiskOnChip BDTL partition"

Edited docboot/cmdline to
     root=/dev/mtdblock1 rootfstype=jffs2 ro

Uncommented "#define OLD_DOC2K" in doc_bootstub.h

Copied in the bzImage I'd tested booting from hard-disk.
     # make
     # flash_eraseall /dev/mtd1
     # nandwrite -o /dev/mtd1 doc_spl
     # flash_eraseall -j /dev/mtd2

Tested mounting and unmounting /dev/mtdblock2 which seemed OK. (My 
cmdline above assumes that this will show as /dev/mtdblock1 when the 
linked-in driver is loaded.)
Rebooted and disabled/removed all other boot devices. As the BIOS gets 
going, I see "Installing DOCBoot." then a "System Configurations" page with
     Verifying DMI Pool Data .........
     Loading kernel... _

where the "_" is a flashing cursor. The keyboard is unresponsive and 
nothing further happens :(

By the way, I have not yet copied any files to the jffs2 filesystem on 
/dev/mtdblock1 except a small text file to test the filesystem.

Any ideas? I'd really like to get this going.

Thanks again,

- Zeri

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