[U-Boot-Users] TQM860L and JFFS2???

[U-Boot-Users] TQM860L and JFFS2???

[Steven Scholz]

Hi there,

I want to use JFFS2 as root fs on a TQM860L board (with u-boot-0.3.0)

It has to flash banks:

Bank # 1: FUJITSU AM29LV160B (16 Mbit, bottom boot sect)
   Size: 4 MB in 35 Sectors
Bank # 2: FUJITSU AM29LV160B (16 Mbit, bottom boot sect)
   Size: 4 MB in 35 Sectors

I added a "CFG_CMD_JFFS2" to the CONFIG_COMMANDS and the lines

#define CFG_JFFS2_FIRST_BANK    1
#define CFG_JFFS2_FIRST_SECTOR  0
#define CFG_JFFS2_NUM_BANKS     1

in ./include/configs/TQM860L.h.

But when building the binary I always get :

ppc_8xx-ld -Bstatic -T 
/home/scholz/Projekte/u-boot/board/tqm8xx/u-boot.lds -Ttext 0x40000000 
-n cpu/mpc8xx/start.o \
                 --start-group board/tqm8xx/libtqm8xx.a 
cpu/mpc8xx/libmpc8xx.a lib_ppc/libppc.a fs/jffs2/libjffs2.a 
fs/fdos/libfdos.a net/libnet.a disk/libdisk.a rtc/librtc.a 
dtt/libdtt.a drivers/libdrivers.a post/libpost.a post/cpu/libcpu.a 
common/libcommon.a lib_generic/libgeneric.a --end-group \
                 -Map u-boot.map -o u-boot
/home/scholz/Projekte/u-boot/board/tqm8xx/u-boot.lds:137 cannot move 
location counter backwards (from 40008124 to 40008000)

I tried different values for CFG_JFFS2_FIRST_BANK et.al.
But I have to admit I am not sure about their meanings! ;-)

Is CFG_JFFS2_FIRST_BANK=1 the second bank?
Is CFG_JFFS2_NUM_BANKS the number of banks used only for JFFS? Or the 
total number of flash banks?

On a different board (DAB4K, with only one big flash bank) I just had
#define CFG_JFFS2_FIRST_BANK    0
#define CFG_JFFS2_FIRST_SECTOR  0
#define CFG_JFFS2_NUM_BANKS     1
and it worked.

How does the code find the JFFS partition? Just scanning the flash for 
  a bit of magic? (0x1985?)

Thanks a million in advance!

Steven

[U-Boot-Users] TQM860L and JFFS2???

[Wolfgang Denk]

In message <3EDB7EB4.8080305@imc-berlin.de> you wrote:
> 
> I want to use JFFS2 as root fs on a TQM860L board (with u-boot-0.3.0)
...
> I added a "CFG_CMD_JFFS2" to the CONFIG_COMMANDS and the lines
...
> /home/scholz/Projekte/u-boot/board/tqm8xx/u-boot.lds:137 cannot move 
> location counter backwards (from 40008124 to 40008000)

You have to adjust the linker script  (board/tqm8xx/u-boot.lds);  one
of  the  early  sections  grows  because of youyr change, so it would
overlap the location with the environment sectors.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Harrison's Postulate:
	For every action, there is an equal and opposite criticism.

[U-Boot-Users] TQM860L and JFFS2???

[Steven Scholz]

Wolfgang Denk schrieb:
> In message <3EDB7EB4.8080305@imc-berlin.de> you wrote:
> 
>>I want to use JFFS2 as root fs on a TQM860L board (with u-boot-0.3.0)
> 
> ...
> 
>>I added a "CFG_CMD_JFFS2" to the CONFIG_COMMANDS and the lines
> 
> ...
> 
>>/home/scholz/Projekte/u-boot/board/tqm8xx/u-boot.lds:137 cannot move 
>>location counter backwards (from 40008124 to 40008000)
> 
> 
> You have to adjust the linker script  (board/tqm8xx/u-boot.lds);  one
> of  the  early  sections  grows  because of youyr change, so it would
> overlap the location with the environment sectors.
> 
Thanks for that hint! It's fine now.

Steven

[U-Boot-Users] TQM860L and JFFS2???

[Steven Scholz]

It works now, but please again:

Is CFG_JFFS2_FIRST_BANK=1 the second bank?
Is CFG_JFFS2_NUM_BANKS the number of banks used only for JFFS? Or the
total number of flash banks?

How does the code find the JFFS partition? Just scanning the flash for
a bit of magic? (0x1985?)

Thanks,

Steven