u-boot中nand相關指令使用---- ubi, ubifsls, ubifsmount, ubifsumount

 [Version: 2013-01-rc2]

[Author: Bo Shen <[email protected]>]

1.  幫助資訊

1.1 ubi

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U-Boot> ubi

ubi - ubi commands

Usage:

ubi part [part] [offset]

- Show or set current partition (with optional VID header offset)

ubi info [l[ayout]] - Display volume and ubi layout information

ubi create[vol] volume [size] [type] - create volume name with size

ubi write[vol] address volume size - Write volume from address with size

ubi read[vol] address volume [size] - Read volume to address with size

ubi remove[vol] volume - Remove volume

[Legends]

volume: character name

size: specified in bytes

type: s[tatic] or d[ynamic] (default=dynamic)

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1.2 ubifsls

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U-Boot> ubifsls

UBIFS not mounted, use ubifsmount to mount volume first!

ubifsls - list files in a directory

Usage:

ubifsls [directory]

- list files in a 'directory' (default '/')

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1.3 ubifsmout

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U-Boot> ubifsmount

ubifsmount - mount UBIFS volume

Usage:

ubifsmount <volume-name>

- mount 'volume-name' volume

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1.4 ubifsumount

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U-Boot> ubifsumount

No UBIFS volume mounted!

ubifsumount - unmount UBIFS volume

Usage:

ubifsumount - unmount current volume

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2. 具體使用方法

如果board配置檔案中有設定mtdids和mtdparts，則可以直接用mtdparts檢視，如果沒有，可以通過設定環境變量來使能。

U-Boot> setenv mtdids 'nand0=atmel_nand'

U-Boot> setenv mtdparts 'mtdparts=atmel_nand:8M(bootstrap)ro,-(rootfs)'

U-Boot> mtdparts

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device nand0 <atmel_nand>, # parts = 2

#: name size offset mask_flags

0: bootstrap/uboot/kernel0x00800000 0x00000000 1

1: rootfs 0x0f800000 0x00800000 0

active partition: nand0,0 - (bootstrap/uboot/kernel) 0x00800000 @ 0x00000000

defaults:

mtdids : nand0=atmel_nand

mtdparts: mtdparts=atmel_nand:8M(bootstrap/uboot/kernel)ro,-(rootfs)

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U-Boot> ubi part rootfs

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U-Boot> ubi part rootfs

Creating 1 MTD partitions on "nand0":

0x000000800000-0x000010000000 : "mtd=1"

UBI: attaching mtd1 to ubi0

UBI: physical eraseblock size: 131072 bytes (128 KiB)

UBI: logical eraseblock size: 126976 bytes

UBI: smallest flash I/O unit: 2048

UBI: VID header offset: 2048 (aligned 2048)

UBI: data offset: 4096

UBI: empty MTD device detected

UBI: create volume table (copy #1)

UBI: create volume table (copy #2)

UBI: attached mtd1 to ubi0

UBI: MTD device name: "mtd=1"

UBI: MTD device size: 248 MiB

UBI: number of good PEBs: 1984

UBI: number of bad PEBs: 0

UBI: max. allowed volumes: 128

UBI: wear-leveling threshold: 4096

UBI: number of internal volumes: 1

UBI: number of user volumes: 0

UBI: available PEBs: 1961

UBI: total number of reserved PEBs: 23

UBI: number of PEBs reserved for bad PEB handling: 19

UBI: max/mean erase counter: 1/0

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U-Boot> ubi create rootfs

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U-Boot> ubi create rootfs

No size specified -> Using max size (248999936)

Creating dynamic volume rootfs of size 248999936

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U-Boot> tftpboot 0x20000000 rootfs.ubi

U-Boot> ubi write 0x20000000 rootfs 0x1911000

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U-Boot> ubi write 0x20000000 rootfs 0x1911000

26284032 bytes written to volume rootfs

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U-Boot> ubifsmount rootfs

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U-Boot> ubifsmount rootfs

UBIFS: mounted UBI device 0, volume 0, name "rootfs"

UBIFS: mounted read-only

UBIFS: file system size: 247603200 bytes (241800 KiB, 236 MiB, 1950 LEBs)

UBIFS: journal size: 9023488 bytes (8812 KiB, 8 MiB, 72 LEBs)

UBIFS: media format: w4/r0 (latest is w4/r0)

UBIFS: default compressor: LZO

UBIFS: reserved for root: 0 bytes (0 KiB)

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U-Boot> ubifsls

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U-Boot> ubifsls

<DIR> 5368 Mon Dec 24 08:18:48 2012 bin

<DIR> 288 Mon Oct 29 07:56:14 2012 dev

<DIR> 2128 Mon Dec 24 08:18:47 2012 etc

<DIR> 2408 Mon Dec 24 08:18:47 2012 lib

<DIR> 160 Tue Dec 18 03:07:01 2012 mnt

<DIR> 160 Tue Dec 18 03:07:01 2012 opt

<LNK> 3 Tue Nov 27 02:10:35 2012 run

<DIR> 304 Tue Dec 18 03:30:12 2012 tmp

<DIR> 160 Tue Dec 18 03:07:01 2012 sys

<DIR> 672 Mon Oct 29 07:56:14 2012 var

<DIR> 480 Wed Dec 19 01:41:33 2012 usr

<DIR> 288 Tue Dec 18 03:30:26 2012 home

<DIR> 160 Tue Dec 18 03:07:01 2012 proc

<DIR> 3720 Mon Dec 24 08:18:48 2012 sbin

<DIR> 376 Tue Dec 18 03:07:01 2012 root

<LNK> 11 Tue Dec 18 03:15:34 2012 linuxrc

<DIR> 160 Tue Dec 18 03:07:01 2012 media

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U-Boot> ubifsumount

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U-Boot> ubifsumount

Unmounting UBIFS volume rootfs!

3. FAQ

3.1 如何從ubifs image中讀取Linux kernel然後boot呢？

      --> ubi part rootfs; ubifsmount rootfs; ubifsload 0x20000000 boot/uImage; bootm 0x20000000;

      如何確定每一步都正常執行呢？ (将;全部改為&&除最後一個)

      --> ubi part rootfs && ubifsmount rootfs && ubifsload 0x20000000 boot/uImage && bootm 0x20000000;