jffs2文件系统制作与移植

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主机操作系统：Centos 6.7
交叉编译器环境：arm-linux-gcc-4.5.4
开发板平台： FL2440
Linux内核版本： linux-3.0
制作文件系统类型：JFFS2
邮箱：leiyuxing205@gmail.com
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JFFS文件系统最早是由瑞典Axis Communications公司基于Linux2.0的内核为嵌入式系统开发的文件系统JFFS2(Journalling Flash FileSystem v2，日志闪存文件系统版本2 )是RedHat公司基于JFFS开发的闪存文件系统，最初是针对RedHat公司的嵌入式产品eCos开发的嵌入式文件系统，所JFFS2也可以用在Linux, uCLinux中。它主要用于NOR型闪存，基于MTD驱动层，特点是：可读写的、支持数据压缩的、基于哈希表的日志型文件系统，并提供了崩溃/掉电安全保护，提供“写平衡”支持等。缺点主要是当文件系统已满或接近满时，因为垃圾收集的关系而使jffs2的运行速度大大放慢。

Jffs2不适合用于NAND闪存主要是因为NAND闪存的容量一般较大，这样导致jffs2为维护日志节点所占用的内存空间迅速增大，另外，jffs2文件系统在挂载时需要扫描整个FLASH的内容，以找出所有的日志节点，建立文件结构，对于大容量的NAND闪存会耗费大量时间。

目前jffs3正在开发中，关于jffs2系列文件系统的使用详细文档，可参考MTD补丁包中mtd-jffs-HOWTO.txt。

1.对根文件系统进行修改

无修改

2.添加内核对jffs2的支持

[leiyuxing@centos6 linux-3.0]$ export TERM=vt100

[leiyuxing@centos6 linux-3.0]$ make menuconfig

File systems --->
      Miscellaneous filesystems --->
           <*> Journalling Flash File System v2 (JFFS2) support
           (0)   JFFS2 debugging verbosity (0 = quiet, 2 = noisy)
           [*]   JFFS2 write-buffering support
           [ ]   JFFS2 summary support (EXPERIMENTAL)
           [ ]   JFFS2 XATTR support (EXPERIMENTAL)
           [ ]   Advanced compression options for JFFS2

[leiyuxing@centos6 linux-3.0]$ make

3.制作mkfs.jffs2和mkfs.ubifs工具

[leiyuxing@centos6 rootfs]$ mkdir mtd-utiles

[leiyuxing@centos6 rootfs]$ cd mtd-utiles/

[leiyuxing@centos6 mtd-utiles]$ vim build.sh

#!/bin/sh

#+--------------------------------------------------------------------------------------------
#|Description:  This shell script used to download lzo,zlib,mtd-utils source code
#|              and cross compile it for ARM Linux, all is static cross compile.
#|     Author:  GuoWenxue <guowenxue@gmail.com>
#|  ChangeLog:
#|           1, Initialize 1.0.0 on 2011.04.12
#+--------------------------------------------------------------------------------------------

PRJ_PATH=`pwd`

LZO="lzo-2.04"
ZLIB="zlib-1.2.5"
e2fsprogs_ver=1.42
mtd="mtd-utils-1.4.9"

function decompress_packet()
(
   echo "+---------------------------------------------+"
   echo "|  Decompress $1 now"
   echo "+---------------------------------------------+"

    ftype=`file "$1"`
    case "$ftype" in
       "$1: Zip archive"*)
           unzip "$1" ;;
       "$1: gzip compressed"*)
            if [ `expr "$1" : ".*.tar.*" ` ] ; then
                  tar -xzf $1
            else
                  gzip -d "$1"
            fi ;;
       "$1: bzip2 compressed"*)
            if [ `e
xpr "$1" : ".*.tar.*" ` ] ; then
                  tar -xjf $1
            else
                bunzip2 "$1"
            fi ;;
       "$1: POSIX tar archive"*)
            tar -xf "$1" ;;
       *)
            echo "$1 is unknow compress format";;
     esac
)

# Download lzo source code packet
if [ ! -s $LZO.tar.gz ] ; then
     wget http://www.oberhumer.com/opensource/lzo/download/$LZO.tar.gz
fi

# Decompress lzo source code packet
if [ ! -d $LZO ] ; then
       decompress_packet $LZO.tar.*
fi

# Cross compile lzo

cd  $LZO
if [ ! -s src/.libs/liblzo*.a ] ; then
    unset LDFLAGS
    ./configure  --enable-static --disable-shared
    make
fi
cd  -


echo "+----------------------------------------+"
echo "|  Cross compile $ZLIB now "
echo "| Crosstool:  $CROSS"
echo "+----------------------------------------+"

# Download zlib source code packet
if [ ! -s $ZLIB.tar* ] ; then
#wget http://www.zlib.net/$ZLIB.tar.gz
   #wget http://www.imagemagick.org/download/delegates/$ZLIB.tar.bz2
   #wget http://down1.chinaunix.net/distfiles/$ZLIB.tar.bz2
    wget http://pkgs.fedoraproject.org/repo/pkgs/zlib/zlib-1.2.5.tar.bz2/be1e89810e66150f5b0327984d8625a0/$ZLIB.tar.bz2
fi

# Decompress zlib source code packet
if [ ! -d $ZLIB ] ; then
    decompress_packet $ZLIB.tar.*
fi

#Cross compile zlib

cd  $ZLIB
if [ ! -s libz.a ] ; then
    unset LDFLAGS
    ./configure  --static
    make
fi
cd  -


echo "+----------------------------------------+"
echo "|  Cross compile e2fsprogsV$e2fsprogs_ver now "
echo "| Crosstool:  $CROSS"
echo "+----------------------------------------+"
#e2fsprogs is for UBIFS, download e2fsprogs source code packet
if [ ! -s e2fsprogs-$e2fsprogs_ver.tar.gz ] ; then
   wget http://nchc.dl.sourceforge.net/project/e2fsprogs/e2fsprogs/$e2fsprogs_ver/e2fsprogs-$e2fsprogs_ver.tar.gz
fi

# Decompress e2fsprogs source code packet
if [ ! -d e2fsprogs-$e2fsprogs_ver ] ; then
    decompress_packet e2fsprogs-$e2fsprogs_ver.tar.*
fi

cd e2fsprogs-$e2fsprogs_ver
if [ ! -s lib/libuuid.a ] ; then
   ./configure --enable-elf-shlibs
   make
fi
cd -

echo "+----------------------------------------+"
echo "|  Cross compile mtd-utils now "
echo "| Crosstool:  $CROSS"
echo "+----------------------------------------+"

if [ ! -s ${mtd}.tar.bz2 ] ; then
     wget ftp://ftp.infradead.org/pub/mtd-utils/${mtd}.tar.bz2
fi
decompress_packet ${mtd}.tar.bz2

# download mtd-utils source code
#if [ ! -d  mtd-utils* ] ; then
    #git clone git://git.infradead.org/mtd-utils.git

#fi

cd ${mtd}
#Add the CROSS tool in file common.mk

line=`sed -n '/CFLAGS ?= -O2 -g/=' common.mk `
if [ ! -z $line ] ; then
     sed -i -e ${line}s"|.*|CFLAGS ?= -O2 -g --static|" common.mk
fi

unset LDFLAGS
unset CFLAGS

set -x
export CFLAGS="-DWITHOUT_XATTR -I$PRJ_PATH/$ZLIB -I$PRJ_PATH/$LZO/include -I$PRJ_PATH/e2fsprogs-$e2fsprogs_ver/lib"
export ZLIBLDFLAGS=-L$PRJ_PATH/$ZLIB
export LZOLDFLAGS=-L$PRJ_PATH/$LZO/src/.libs/
export LDFLAGS="-static -L $PRJ_PATH/e2fsprogs-$e2fsprogs_ver/lib $ZLIBLDFLAGS $LZOLDFLAGS"
make

set -x
#strip nandwrite flash_erase  nanddump
#sudo cp nandwrite $INST_PATH/.nandwrite
#sudo cp flash_erase $INST_PATH/.flash_erase
#sudo cp nanddump $INST_PATH/.nanddump

"build.sh" [新] 157L, 4268C已写入

[leiyuxing@centos6 mtd-utiles]$ ls

build.sh

[leiyuxing@centos6 mtd-utiles]$ sh build.sh

[leiyuxing@centos6 mtd-utiles]$ ls

build.sh lzo-2.04 mtd-utils-1.4.9.tar.bz2

e2fsprogs-1.42 lzo-2.04.tar.gz zlib-1.2.5

e2fsprogs-1.42.tar.gz mtd-utils-1.4.9 zlib-1.2.5.tar.bz2

[leiyuxing@centos6 mtd-utiles]$ cd mtd-utils-1.4.9

[leiyuxing@centos6 mtd-utils-1.4.9]$ ls

common.mk flash_otp_lock.c nanddump.o

compr.c flash_otp_write.c nandtest

compr.h flash_unlock nandtest.c

compr_lzo.c flash_unlock.c nandtest.o

compr_lzo.o flash_unlock.o nandwrite

compr.o ftl_check nandwrite.c

compr_rtime.c ftl_check.c nandwrite.o

compr_rtime.o ftl_check.o nftldump

compr_zlib.c ftl_format nftldump.c

compr_zlib.o ftl_format.c nftldump.o

COPYING ftl_format.o nftl_format

device_table.txt include nftl_format.c

docfdisk jffs2dump nftl_format.o

docfdisk.c jffs2dump.c rbtree.c

docfdisk.o jffs2dump.o rbtree.h

doc_loadbios jffs2reader rbtree.o

doc_loadbios.c jffs2reader.c recv_image

doc_loadbios.o jffs2reader.o recv_image.c

feature-removal-schedule.txt jffs-dump.c recv_image.o

fectest.c lib rfddump

flashcp load_nandsim.sh rfddump.c

flashcp.c make_a_release.sh rfddump.o

flashcp.o MAKEDEV rfdformat

flash_erase Makefile rfdformat.c

flash_eraseall mcast_image.h rfdformat.o

flash_erase.c mkfs.jffs2 serve_image

flash_erase.o mkfs.jffs2.1 serve_image.c

flash_lock mkfs.jffs2.c serve_image.o

flash_lock.c mkfs.jffs2.o summary.h

flash_lock.o mkfs.ubifs sumtool

flash_otp_dump mtd_debug sumtool.c

flash_otp_dump.c mtd_debug.c sumtool.o

flash_otp_dump.o mtd_debug.o tests

flash_otp_info mtd-utils.spec ubi-utils

flash_otp_info.c nanddump

flash_otp_info.o nanddump.c

[leiyuxing@centos6 mtd-utils-1.4.9]$ ls mkfs.ubifs/

compr.c crc16.c devtable.c lpt.c mkfs.ubifs.c ubifs.h

compr.h crc16.h devtable.o lpt.h mkfs.ubifs.h ubifs-media.h

compr.o crc16.o hashtable lpt.o mkfs.ubifs.o

COPYING defs.h key.h mkfs.ubifs README

[leiyuxing@centos6 mtd-utils-1.4.9]$ ls

common.mk flash_otp_lock.c nanddump.o

compr.c flash_otp_write.c nandtest

compr.h flash_unlock nandtest.c

compr_lzo.c flash_unlock.c nandtest.o

compr_lzo.o flash_unlock.o nandwrite

compr.o ftl_check nandwrite.c

compr_rtime.c ftl_check.c nandwrite.o

compr_rtime.o ftl_check.o nftldump

compr_zlib.c ftl_format nftldump.c

compr_zlib.o ftl_format.c nftldump.o

COPYING ftl_format.o nftl_format

device_table.txt include nftl_format.c

docfdisk jffs2dump nftl_format.o

docfdisk.c jffs2dump.c rbtree.c

docfdisk.o jffs2dump.o rbtree.h

doc_loadbios jffs2reader rbtree.o

doc_loadbios.c jffs2reader.c recv_image

doc_loadbios.o jffs2reader.o recv_image.c

feature-removal-schedule.txt jffs-dump.c recv_image.o

fectest.c lib rfddump

flashcp load_nandsim.sh rfddump.c

flashcp.c make_a_release.sh rfddump.o

flashcp.o MAKEDEV rfdformat

flash_erase Makefile rfdformat.c

flash_eraseall mcast_image.h rfdformat.o

flash_erase.c mkfs.jffs2 serve_image

flash_erase.o mkfs.jffs2.1 serve_image.c

flash_lock mkfs.jffs2.c serve_image.o

flash_lock.c mkfs.jffs2.o summary.h

flash_lock.o mkfs.ubifs sumtool

flash_otp_dump mtd_debug sumtool.c

flash_otp_dump.c mtd_debug.c sumtool.o

flash_otp_dump.o mtd_debug.o tests

flash_otp_info mtd-utils.spec ubi-utils

flash_otp_info.c nanddump

flash_otp_info.o nanddump.c

[leiyuxing@centos6 mtd-utils-1.4.9]$ file mkfs.jffs2

mkfs.jffs2: ELF 32-bit LSB executable, Intel 80386, version 1 (GNU/Linux), statically linked, not stripped

[leiyuxing@centos6 mtd-utils-1.4.9]$ sudo cp mkfs.jffs2 /usr/local/bin/

[leiyuxing@centos6 mtd-utils-1.4.9]$ mkfs

mkfs mkfs.ext2 mkfs.ext4 mkfs.jffs2 mkfs.vfat

mkfs.cramfs mkfs.ext3 mkfs.ext4dev mkfs.msdos

[leiyuxing@centos6 mtd-utils-1.4.9]$ mkfs.jffs2 -V

mkfs.jffs2: error!: revision 1.60

[leiyuxing@centos6 mtd-utils-1.4.9]$ mkfs.jffs2

mkfs.jffs2: error!: Usage: mkfs.jffs2 [OPTIONS]

Make a JFFS2 file system image from an existing directory tree

Options:

-p, --pad[=SIZE] Pad output to SIZE bytes with 0xFF. If SIZE is

not specified, the output is padded to the end of

the final erase block

-r, -d, --root=DIR Build file system from directory DIR (default: cwd)

-s, --pagesize=SIZE Use page size (max data node size) SIZE (default: 4KiB)

-e, --eraseblock=SIZE Use erase block size SIZE (default: 64KiB)

-c, --cleanmarker=SIZE Size of cleanmarker (default 12)

-m, --compr-mode=MODE Select compression mode (default: priortiry)

-x, --disable-compressor=COMPRESSOR_NAME

Disable a compressor

-X, --enable-compressor=COMPRESSOR_NAME

Enable a compressor

-y, --compressor-priority=PRIORITY:COMPRESSOR_NAME

Set the priority of a compressor

-L, --list-compressors Show the list of the avaiable compressors

-t, --test-compression Call decompress and compare with the original (for test)

-n, --no-cleanmarkers Don't add a cleanmarker to every eraseblock

-o, --output=FILE Output to FILE (default: stdout)

-l, --little-endian Create a little-endian filesystem

-b, --big-endian Create a big-endian filesystem

-D, --devtable=FILE Use the named FILE as a device table file

-f, --faketime Change all file times to '0' for regression testing

-q, --squash Squash permissions and owners making all files be owned by root

-U, --squash-uids Squash owners making all files be owned by root

-P, --squash-perms Squash permissions on all files

-h, --help Display this help text

-v, --verbose Verbose operation

-V, --version Display version information

-i, --incremental=FILE Parse FILE and generate appendage output for it

4.制作映像文件

[leiyuxing@centos6 rootfs]$ sudo /usr/local/bin/mkfs.jffs2 -n -s 2048 -e 128KiB -d rootfs -o rootfs.jffs2 --pad=0x1400000

[leiyuxing@centos6 rootfs]$ du -h rootfs.jffs2

20M rootfs.jffs2

5.添加uboot对jffs2支持

根据上面内核对nandlfash的分区，对uboot的环境参数做相应的设置：

[fl2440@lingyun]# set bjffs2 'tftp 30008000 rootfs.jffs2;nand erase 1000000 4000000;nand write.jffs2 30008000 1000000 1400000'

[fl2440@lingyun]# set bootargs_jffs2 'noinitrd root=/dev/mtdblock2 rootfstype=jffs2 init=/linuxrc console=ttyS0,115200'

[fl2440@lingyun]# set bootargs 'noinitrd root=/dev/mtdblock2 rootfstype=jffs2 init=/linuxrc console=ttyS0,115200'

[fl2440@lingyun]# set bootcmd_jffs2 'nand read 30008000 100000 400000;bootm 30008000'

[fl2440@lingyun]# set bootcmd 'run bootcmd_jffs2'

[fl2440@lingyun]# save

Saving Environment to NAND...

Erasing Nand...

Erasing at 0x60000 -- 100% complete.

Writing to Nand... done

[fl2440@lingyun]# pri

bbl=tftp 30008000 u-boot-s3c2440.bin;nand erase 0 100000;nand write 30008000 0 40000

blx=tftp 30008000 linuxrom-s3c2440.bin;nand erase 100000 F00000;nand write 30008000 100000 F00000

tb=tftp 30008000 linuxrom-s3c2440.bin; bootm 30008000

bootdelay=2

baudrate=115200

ethaddr=08:00:3e:26:0a:51

ethact=dm9000

filesize=2BC9B4

fileaddr=30008000

netmask=255.255.255.0

ipaddr=192.168.1.168

serverip=192.168.1.2

bkr=tftp 30008000 linuxrom-s3c2440.bin;nand erase 100000 8000000;nand write 30008000 100000 800000

bootcmd_initramdisk=nand read 30008000 100000 800000;bootm 30008000

stdin=serial

stdout=serial

stderr=serial

bjffs2=tftp 30008000 rootfs.jffs2;nand erase 1000000 4000000;nand write.jffs2 30008000 1000000 1400000

bootargs_jffs2=noinitrd root=/dev/mtdblock2 rootfstype=jffs2 init=/linuxrc console=ttyS0,115200

bootargs=noinitrd root=/dev/mtdblock2 rootfstype=jffs2 init=/linuxrc console=ttyS0,115200

bootcmd_jffs2=nand read 30008000 100000 400000;bootm 30008000

bootcmd=run bootcmd_jffs2

Environment size: 988/131068 bytes

下载内核和rootfs.jffs2映像文件

[fl2440@lingyun]# run bkr

dm9000 i/o: 0x20000300, id: 0x90000a46

DM9000: running in 16 bit mode

MAC: 08:00:3e:26:0a:51

could not establish link

operating at 100M full duplex mode

Using dm9000 device

TFTP from server 192.168.1.2; our IP address is 192.168.1.168

Filename 'linuxrom-s3c2440.bin'.

Load address: 0x30008000

Loading: #################################################################

#################################################################

#########################

done

Bytes transferred = 2264844 (228f0c hex)

NAND erase: device 0 offset 0x100000, size 0x8000000

Skipping bad block at 0x005c0000

Skipping bad block at 0x031a0000

Erasing at 0x80e0000 -- 100% complete.

NAND write: device 0 offset 0x100000, size 0x800000

Skip bad block 0x005c0000

8388608 bytes written: OK

[fl2440@lingyun]# run bjffs2

dm9000 i/o: 0x20000300, id: 0x90000a46

DM9000: running in 16 bit mode

MAC: 08:00:3e:26:0a:51

could not establish link

operating at 100M full duplex mode

Using dm9000 device

TFTP from server 192.168.1.2; our IP address is 192.168.1.168

Filename 'rootfs.jffs2'.

Load address: 0x30008000

Loading: T #################################################################

#################################################################

################################################################

done

Bytes transferred = 20971520 (1400000 hex)

NAND erase: device 0 offset 0x1000000, size 0x4000000

Skipping bad block at 0x031a0000

Erasing at 0x4fe0000 -- 100% complete.

NAND write: device 0 offset 0x1000000, size 0x1400000

20971520 bytes written: OK

6.启动引导

[fl2440@lingyun]# boot

NAND read: device 0 offset 0x100000, size 0x400000

4194304 bytes read: OK

## Booting kernel from Legacy Image at 30008000 ...

Image Name: Linux Kernel

Created: 2016-07-22 13:00:43 UTC

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 2264780 Bytes = 2.2 MiB

Load Address: 30008040

Entry Point: 30008040

Verifying Checksum ... OK

Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Linux version 3.0.0 (leiyuxing@centos6.7.localdomain) (gcc version 4.5.4 (Buildroot 2012.08) ) #7 Fri Jul 22 21:00:28 CST 2016

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177

CPU: VIVT data cache, VIVT instruction cache

Machine: SMDK2440

Memory policy: ECC disabled, Data cache writeback

CPU S3C2440A (id 0x32440001)

S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz

CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256

Kernel command line: noinitrd root=/dev/mtdblock2 rootfstype=jffs2 init=/linuxrc console=ttyS0,115200

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 60184k/60184k available, 5352k reserved, 0K highmem

Virtual kernel memory layout:

vector : 0xffff0000 - 0xffff1000 ( 4 kB)

fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)

DMA : 0xffc00000 - 0xffe00000 ( 2 MB)

vmalloc : 0xc4800000 - 0xf6000000 ( 792 MB)

lowmem : 0xc0000000 - 0xc4000000 ( 64 MB)

modules : 0xbf000000 - 0xc0000000 ( 16 MB)

.init : 0xc0008000 - 0xc0029000 ( 132 kB)

.text : 0xc0029000 - 0xc0442000 (4196 kB)

.data : 0xc0442000 - 0xc0465d40 ( 144 kB)

.bss : 0xc0465d64 - 0xc049da70 ( 224 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

NR_IRQS:85

irq: clearing pending ext status 00080800

irq: clearing pending ext status 00080000

irq: clearing subpending status 00000003

irq: clearing subpending status 00000002

Console: colour dummy device 80x30

console [ttyS0] enabled

Calibrating delay loop... 201.52 BogoMIPS (lpj=503808)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

gpiochip_add: gpios 288..303 (GPIOK) failed to register

gpiochip_add: gpios 320..334 (GPIOL) failed to register

gpiochip_add: gpios 352..353 (GPIOM) failed to register

NET: Registered protocol family 16

S3C2440: Initialising architecture

S3C2440: IRQ Support

S3C244X: Clock Support, DVS off

bio: create slab <bio-0> at 0

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

s3c-i2c s3c2440-i2c: slave address 0x10

s3c-i2c s3c2440-i2c: bus frequency set to 98 KHz

s3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapter

Advanced Linux Sound Architecture Driver Version 1.0.24.

cfg80211: Calling CRDA to update world regulatory domain

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

UDP hash table entries: 256 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

NET: Registered protocol family 1

RPC: Registered named UNIX socket transport module.

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

NetWinder Floating Point Emulator V0.97 (extended precision)

NTFS driver 2.1.30 [Flags: R/W].

JFFS2 version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.

msgmni has been set to 117

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

Console: switching to colour frame buffer device 60x53

fb0: s3c2410fb frame buffer device

s3c2440-uart.0: ttyS0 at MMIO 0x50000000 (irq = 70) is a S3C2440

s3c2440-uart.1: ttyS1 at MMIO 0x50004000 (irq = 73) is a S3C2440

s3c2440-uart.2: ttyS2 at MMIO 0x50008000 (irq = 76) is a S3C2440

brd: module loaded

loop: module loaded

s3c24xx-nand s3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns

s3c24xx-nand s3c2440-nand: NAND soft ECC

NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-bit)

Scanning device for bad blocks

Bad eraseblock 46 at 0x0000005c0000

Bad eraseblock 397 at 0x0000031a0000

Creating 6 MTD partitions on "NAND":

0x000000000000-0x000000100000 : "mtdblock0 u-boot 1MB"

0x000000100000-0x000001000000 : "mtdblock1 kernel 15MB"

0x000001000000-0x000005000000 : "mtdblock2 rootfs 64MB"

0x000005000000-0x00000a000000 : "mtdblock3 apps 80MB"

0x00000a000000-0x00000d000000 : "mtdblock4 data 48MB"

0x00000d000000-0x000010000000 : "mtdblock5 backup 48MB"

dm9000 Ethernet Driver, V1.31

ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

usbcore: registered new interface driver libusual

s3c2410_udc: debugfs dir creation failed -19

mousedev: PS/2 mouse device common for all mice

i2c /dev entries driver

sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

ALSA device list:

No soundcards found.

TCP cubic registered

NET: Registered protocol family 17

lib80211: common routines for IEEE802.11 drivers

Registering the dns_resolver key type

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

usb 1-1: new full speed USB device number 2 using s3c2410-ohci

usb 1-1: device descriptor read/64, error -62

usb 1-1: new full speed USB device number 3 using s3c2410-ohci

usb 1-1: device descriptor read/64, error -62

VFS: Mounted root (jffs2 filesystem) on device 31:2.

Freeing init memory: 132K

usb 1-1: device descriptor read/64, error -62

usb 1-1: new full speed USB device number 4 using s3c2410-ohci

usb 1-1: device not accepting address 4, error -62

usb 1-1: new full speed USB device number 5 using s3c2410-ohci

usb 1-1: device not accepting address 5, error -62

hub 1-0:1.0: unable to enumerate USB device on port 1

root login: root

Password:

>: ls

apps data etc init linuxrc proc sbin tmp var

bin dev info lib mnt root sys usr

这样jffs2文件系统就自作成功

制作过程中遇到的问题

问题一：

[leiyuxing@centos6 mtd-utiles]$ sh build.sh后遇到如下问题：

jffs2文件系统制作与移植

解决方法：

静态编译时需要将所有的.a库链接到可执行程序中，所以需要libc的静态库文件，使用此命令查看rpm -ql glibc-static提示没有库文件，到下面的地址

http://www.rpmfind.net/linux/rpm2html/search.php?query=libc.a&submit=Search+...

下载glibc-static文件，使用 rpm -iv filename.rpm安装即可，调用find / -name libc.a可以看到libc的静态库，或则利用yum install glibc-static安装。

问题二：

解决方法：

[leiyuxing@centos6 mtd-utils-1.4.9]$ mkfs(按完mkfs后接着按Tab键即可查看，切记不可按Enter否则会出现如上错误）

mkfs mkfs.ext2 mkfs.ext4 mkfs.jffs2 mkfs.vfat

mkfs.cramfs mkfs.ext3 mkfs.ext4dev mkfs.msdos

问题三：

[leiyuxing@centos6 rootfs]$ sudo mkfs.jffs2 -n -s 2048 -e 128KiB -d rootfs -o rootfs.jffs2 --pad=0x1400000

sudo：mkfs.jffs2：找不到命令

解决方法：

[leiyuxing@centos6 rootfs]$ sudo cp mkfs.jffs2 /usr/local/bin/

因为之前已经将mkfs.jffs2拷贝到 /usr/local/bin/

故

[leiyuxing@centos6 rootfs]$ sudo /usr/local/bin/mkfs.jffs2 -n -s 2048 -e 128KiB -d rootfs -o rootfs.jffs2 --pad=0x1400000

秒客网

jffs2文件系统制作与移植

———————————————————————————————————————

1.对根文件系统进行修改

2.添加内核对jffs2的支持

3.制作mkfs.jffs2和mkfs.ubifs工具

5.添加uboot对jffs2支持

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