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  • README.JFFS2 NaN GiB
    JFFS2 options and usage.
    -----------------------
    
    JFFS2 in U-Boot is a read only implementation of the file system in
    Linux with the same name. To use JFFS2 define CONFIG_CMD_JFFS2.
    
    The module adds three new commands.
    fsload  - load binary file from a file system image
    fsinfo  - print information about file systems
    ls      - list files in a directory
    chpart  - change active partition
    
    If you boot from a partition which is mounted writable, and you
    update your boot environment by replacing single files on that
    partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. Scanning
    the JFFS2 filesystem takes *much* longer with this feature, though.
    Sorting is done while inserting into the fragment list, which is
    more or less a bubble sort. That algorithm is known to be O(n^2),
    thus you should really consider if you can avoid it!
    
    
    There only one way for JFFS2 to find the disk. It uses the flash_info
    structure to find the start of a JFFS2 disk (called partition in the code)
    and you can change where the partition is with two defines.
    
    CONFIG_SYS_JFFS2_FIRST_BANK
    	defined the first flash bank to use
    
    CONFIG_SYS_JFFS2_FIRST_SECTOR
    	defines the first sector to use
    ---
    
    TODO.
    
    	Remove the assumption that JFFS can dereference a pointer
    	into the disk. The current code do not work with memory holes
    	or hardware with a sliding window (PCMCIA).