| 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). |