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Altera_Forum's avatar
Altera_Forum
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15 years ago

Can't mount JFFS2

Hi,

I was trying to implement the JFFS2. So first I added the MTD as mentioned in this article:

http://www.alterawiki.com/wiki/mtd

Here is my output on booting: 

physmap platform flash device: 00800000 at 02800000
  
physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank
  
 Amd/Fujitsu Extended Query Table at 0x0040
  
physmap-flash.0: CFI does not contain boot bank location. Assuming top.
  
number of CFI chips: 1
  
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
  
RedBoot partition parsing not available
  
Using physmap partition information
  
Creating 4 MTD partitions on "physmap-flash.0":
  
0x000000200000-0x000000600000 : "romfs/jffs2"
  
0x000000000000-0x000000200000 : "loader/kernel"
  
0x000000600000-0x000000700000 : "User configuration"
  
0x000000700000-0x000000800000 : "safe configuration"
The key data of my board:

  • Cyclone I Board (NOMMU)

  • 8 MB CFI-Flash named "parallel flash" in SOPC-Builder

This is my output when mounting with

"mount -t jffs2 /dev/mtdblock0 /mnt" 


jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00380000: 0x0101 instead
... 
Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes 
empty_blocks 57, bad_blocks 0, c->nr_blocks 64
mount: mounting /dev/mtdblock0 on /mnt failed: Input/output error

Urmel

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    EDIT:

    I solved the first question, but still got problems. See next post.

    Urmel
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Hi,

    there are still some things which confuse me.

    When I try to execute "flash_eraseall -j /dev/mtd3" I get the error "Permission denied"

    Here are my mtd partitions: 

    
dev:    size   erasesize  name
mtd0: 00400000 00010000 "romfs/jffs2"
mtd1: 00200000 00010000 "loader/kernel"
mtd2: 00100000 00010000 "User configuration"
mtd3: 00100000 00010000 "safe configuration"

    The other partitions mtdblock0 to mtdblock2 can be erased and mounted successfully but not mtdblock3.

    Urmel
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Hi (probably only to myself ;) ),

    I found the solution for the problem why I couldn't mount and erase the fourth mtd partition. I used the example in config.c where the last one "safe configuration" used the mask_flags "MTD_WRITEABLE" which means weirdly the opposite. So it only accepts reading.

    So if I want to first create the partition I have to comment out that line and when I have my file on it just change it to MTD_WRITEABLE again.

    I hope it becomes handy for someone. So my monologue had a meaning :)

    Urmel