| 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). |