u-boot/doc/README.ubi

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2 UBI usage in U-Boot
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5 UBI support in U-Boot is broken down into five separate commands.
9 ubi - ubi commands
12 ubi part [part] [offset]
13  - Show or set current partition (with optional VID header offset)
14 ubi info [l[ayout]] - Display volume and ubi layout information
15 ubi create[vol] volume [size] [type] - create volume name with size
16 ubi write[vol] address volume size - Write volume from address with size
17 ubi write.part address volume size [fullsize]
18  - Write part of a volume from address
19 ubi read[vol] address volume [size] - Read volume to address with size
20 ubi remove[vol] volume - Remove volume
27 The first command that is needed to be issues is "ubi part" to connect
31 when such a UBI device is attached (via "ubi part"). Here an example:
42  5: u-boot              0x00080000      0x01f80000      0
44 active partition: nor0,0 - (kernel) 0x00200000 @ 0x00000000
48 mtdparts: mtdparts=1fc000000.nor_flash:2m(kernel),256k(dtb),2m(root),27392k(user),512k(env),512k(u-…
50 => ubi part root
52 0x000000240000-0x000000440000 : "mtd=2"
62 UBI: number of good PEBs:        8
63 UBI: number of bad PEBs:         0
65 UBI: wear-leveling threshold:    4096
66 UBI: number of internal volumes: 1
67 UBI: number of user volumes:     1
69 UBI: total number of reserved PEBs: 8
70 UBI: number of PEBs reserved for bad PEB handling: 0
82 ubi write.part	Write data from memory to UBI volume, in parts
126 UBI: number of good PEBs:        8
127 UBI: number of bad PEBs:         0
132 UBI: wear-leveling threshold:    4096
133 UBI: number of internal volumes: 1
134 UBI: number of user volumes:     1
136 UBI: total number of reserved PEBs: 8
137 UBI: number of PEBs reserved for bad PEB handling: 0
152 UBI partition which has been attached with the ubi part command:
155 ubifsmount - mount UBIFS volume
158 ubifsmount <volume-name>
159     - mount 'volume-name' volume
165 UBIFS: mounted read-only
172 Note that unlike Linux, U-Boot can only have one active UBI partition
182 ubifsls - list files in a directory
186     - list files in a 'directory' (default '/')
191 	    17442  Thu Jan 01 02:57:38 1970  imx28-evk.dtb
200 ubifsload - load file from an UBIFS filesystem
204     - load file 'filename' to address 'addr'
217 ubifsumount - unmount UBIFS volume
220 ubifsumount     - unmount current volume