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

Steven Scholz steven.scholz at imc-berlin.de
Mon Jun 2 18:43:32 CEST 2003

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_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_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!


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