Re: jffs2 file system on MPC8272ADS

Header CRC failed on REF_PRISTINE node at 0x0063b24c: Read 0xffffffff,
calculated 0x44660075 
Node totlen on flash (0xffffffff) != totlen from node ref (0x000002b4) 
Header CRC failed on REF_PRISTINE node at 0x0063b500: Read 0xffffffff,
calculated 0x44660075 
Node totlen on flash (0xffffffff) != totlen from node ref (0x000002c8) 
Header CRC failed on REF_PRISTINE node at 0x0063b7c8: Read 0xffffffff,
calculated 0x44660075 

are they debug messages or warnings...? 

quoted

They are errors.

which are all the most possible reasons for these errors ?

# CONFIG_MTD_MAP_BANK_WIDTH_1 is not set 
# CONFIG_MTD_MAP_BANK_WIDTH_2 is not set 
CONFIG_MTD_MAP_BANK_WIDTH_4=y 
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set 
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set 
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set 
# CONFIG_MTD_CFI_I1 is not set 
CONFIG_MTD_CFI_I2=y 
# CONFIG_MTD_CFI_I4 is not set 
# CONFIG_MTD_CFI_I8 is not set 

[snip]

# 
# Mapping drivers for chip access 
# 
# CONFIG_MTD_COMPLEX_MAPPINGS is not set 
CONFIG_MTD_PHYSMAP=y 
CONFIG_MTD_PHYSMAP_START=0xFC000000 
CONFIG_MTD_PHYSMAP_LEN=0x4000000CONFIG_MTD_PHYSMAP_BANKWIDTH=4 
# CONFIG_MTD_MULTI_PHYSMAP is not set 
# CONFIG_MTD_SBC8240 is not set 
CONFIG_MTD_PQ2FADS=y 
# CONFIG_MTD_PLATRAM is not set 

quoted

Are you using a non-standard flash SIMM?  The one that comes with the
board (that I've seen, at least) have interleave 4, and are mapped at
0xfe000000.

 First of all this is CUSTOM board similar to MPC8272ADS.

We are using flash which is different from flash that comes with the
MPC8272ADS board.

FLASH:	 S29GL256N90TF
       	Total size is 64 MB with 2 flash interleave
       	mapped at 0xfc000000.
       	

quoted

Was it the physmap driver or the pq2fads driver that found the flash?

       
             Flash is cfi compatible.

quoted

Which kernel are you using, and are you using arch/ppc or arch/powerpc?
-Scott

          
           KERNEL: linux-2.6.10 and we r using arc/ppc 	

Nethra

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