1 JFFS2 options and usage.
2 -----------------------
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 CFG_CMD_JFFS2.
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
12 If you boot from a partition which is mounted writable, and you
13 update your boot environment by replacing single files on that
14 partition, you should also define CFG_JFFS2_SORT_FRAGMENTS. Scanning
15 the JFFS2 filesystem takes *much* longer with this feature, though.
16 Sorting is done while inserting into the fragment list, which is
17 more or less a bubble sort. That algorithm is known to be O(n^2),
18 thus you should really consider if you can avoid it!
21 There is two ways for JFFS2 to find the disk. The default way uses
22 the flash_info structure to find the start of a JFFS2 disk (called
23 partition in the code) and you can change where the partition is with
27 defined the first flash bank to use
29 CFG_JFFS2_FIRST_SECTOR
30 defines the first sector to use
33 The second way is to define CFG_JFFS_CUSTOM_PART and implement the
34 jffs2_part_info(int part_num) function in your board specific files.
35 In this mode CFG_JFFS2_FIRST_BANK and CFG_JFFS2_FIRST_SECTOR is not
38 The input is a partition number starting with 0.
39 Return a pointer to struct part_info or NULL for error;
41 Ex jffs2_part_info() for one partition.
43 #if defined CFG_JFFS_CUSTOM_PART
44 #include <jffs2/jffs2.h>
46 static struct part_info part;
49 jffs2_part_info(int part_num)
52 if(part.usr_priv==(void*)1)
55 memset(&part, 0, sizeof(part));
56 part.offset=(char*)0xFF800000;
57 part.size=1024*1024*8;
59 /* Mark the struct as ready */
60 part.usr_priv=(void*)1;
71 Add a new command so it's actually possible to change
74 Remove the assumption that JFFS can dereference a pointer
75 into the disk. The current code do not work with memory holes
76 or hardware with a sliding window (PCMCIA).