1 JFFS2 options and usage. 2 ----------------------- 3 4 JFFS2 in U-Boot is a read only implementation of the file system in 5 Linux with the same name. To use JFFS2 define CONFIG_CMD_JFFS2. 6 7 The module adds three new commands. 8 fsload - load binary file from a file system image 9 fsinfo - print information about file systems 10 ls - list files in a directory 11 chpart - change active partition 12 13 If you do now need the commands, you can enable the filesystem separately 14 with CONFIG_FS_JFFS2 and call the jffs2 functions yourself. 15 16 If you boot from a partition which is mounted writable, and you 17 update your boot environment by replacing single files on that 18 partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. Scanning 19 the JFFS2 filesystem takes *much* longer with this feature, though. 20 Sorting is done while inserting into the fragment list, which is 21 more or less a bubble sort. That algorithm is known to be O(n^2), 22 thus you should really consider if you can avoid it! 23 24 25 There only one way for JFFS2 to find the disk. It uses the flash_info 26 structure to find the start of a JFFS2 disk (called partition in the code) 27 and you can change where the partition is with two defines. 28 29 CONFIG_SYS_JFFS2_FIRST_BANK 30 defined the first flash bank to use 31 32 CONFIG_SYS_JFFS2_FIRST_SECTOR 33 defines the first sector to use 34 --- 35 36 TODO. 37 38 Remove the assumption that JFFS can dereference a pointer 39 into the disk. The current code do not work with memory holes 40 or hardware with a sliding window (PCMCIA). 41
