mini2440 uboot使用nfs方式引导内核，文件系统

成于坚持，败于止步

看了一段时间的u-boot了，到今天才真正完全实现u-boot引导内核和文件系统，顺利开机，在此记录完整过程

1、首先如果你u-boot还没有一直也没有关系，这里上传了一个已经移植好的u-boot，版本问2010.03，多谢tekkaman分享的这个源码

分享下载地址：u-boot-2010.03

编译uboot的过程就不在多说了，解压到你希望的目录下执行make，当时事前安装好交叉编译工具，这个相信大家都会

编译完成之后生成uboot.bin文件，使用mini2440自带的USB下载方式下载到开发板，选择v命令下载即可

开机界面如下，你的可能不完全显示的一样，这是经过我修改的

U-Boot 2010.03 (Jun 20 2013 - 08:43:59)Modified by Seal ([e-mail])Study Linux and love linux forever!!Study u-bootI2C:   readyDRAM:  64 MBFlash:  2 MBNAND:  256 MiBVideo: 240x320x16 20kHz 62HzIn:    serialOut:   serialErr:   serialUSB slave is enable!Net:   dm9000Hit any key to stop autoboot:  0 [u-boot@MINI2440]#

然后就要开始考虑怎么下载内核了，不错，要引导内核首先你需要把内核下载的你的内存中，那么首先配置好你的下载环境是最重要的

2、linux nfs安装与配置

在ubuntu下安装、配置nfs服务的步骤如下： 

安装nfs 

Ubuntu上默认是没有安装nfs服务器的，因此我们首先安装nfs服务器端： 

$sudo apt-get install nfs-kernel-server 

在一些文档中，提出还需要使用apt-get来手动安装nfs的客户端nfs-common，以及端口映射器portmap，但其实这是没有必要的，因为在安装nfs-kernel-server时，apt会自动为我们把它们安装好。

配置/etc/exports 

nfs允许挂载的目录及权限在文件/etc/exports中进行了定义。 

例如，我们要将根目录下的rootfs目录共享出来，那么我们需要在/etc/exports文件末尾添加如下一行：

/rootfs *(rw,sync,no_root_squash)

其中： /rootfs是要共享的目录，*代表允许所有的网络段访问，rw是可读写权限,sync是资料同步写入内存和硬盘，no_root_squash是nfs客户端分享目录使用者的权限，如果客户端使用的是root用户，那么对于该共享目录而言，该客户端就具有root权限。

nfs的安装如果大家还有疑问网上可以多查查

接下就要配置pc端和我们开发板端的ip等，以达到我们使用nfs这种方式下载image的目的

从新启动nfs

/etc/init.d/nfs-kernel-server restart

挂载方法：

mount 192.168.1.103:/root/tftpboot  /test

嵌入式要mount 的时候 使用

mount -o nolock 192.168.1.103:/root/tftpboot /mnt/net

3、配置开发板ip和主机ip

我的配置参数：

开发板ip：192.168.1.102

主机ip(pc端ip)：192.168.1.103

uboot启动起来的使用printenv查看默认参数，包括开发板ip、server ip，还有其他一些启动参数

[u-boot@MINI2440]# printenvbootdelay=5baudrate=115200ethaddr=08:08:11:18:12:27netmask=255.255.255.0tekkaman=bmp d 70000 stdin=serialstdout=serialstderr=serialethact=dm9000ipaddr=192.168.1.102serverip=192.168.1.103gatewayip=192.168.1.1bootcmd=nfs 0x30008000 192.168.1.103:/root/tftpboot/w35_image.img ;bootm 30008000bootargs=root=/dev/nfs rw nfsroot=192.168.1.103:/root/tftpboot/rootfs ip=192.168.1.102:192.168.1.1::255.255.255.0 console=ttySAC0,115200 init=/linuxrc mem=64MEnvironment size: 460/131068 bytes[u-boot@MINI2440]# 

上面打印出来的参数请参照设置，特别是以下说到的几个参数格外小心，他们直接关系到你的image是否可以成功下载，成功被引导，文件系统是否成功挂载并启动

其实为了使用nfs而设定的参数为以下以下几个：

ipaddr（开发板ip）

serverip（pc端作为服务器的ip）

gatewayip（使主机ip和开发板ip在同一个网段内）

bootcmd用于启动时下载image到指定的内存地址，同时使用bootm命令引导内核启动

bootargs 用于使用nfs方式挂载我们创建好的文件系统

其他参数从字面大家也可以理解，设置方法很简单，举例说明，设置bootcmd的方法

setenv bootcmd 'nfs 0x30008000 192.168.1.103:/root/tftpboot/w35_image.img \;bootm 30008000'

其他设置方法依次类推，值得注意的是：设置完成必须保持到内存，下一次启动才会生效，使用saveenv命令

4、如何实现使用nfs下载image到指定内存

首先需要制作能被u-boot直接引导的内核image，通常，kernel的启动需要u-boot提供一些参数信息，比如ramdisk在RAM中的地址。经过编译后的u-boot在根目录下的tools目录中，会有个叫做mkimage的工具，他可以给zImage添加一个header，也就是说使得通常我们编译的内核zImage添加一个数据头信息部分，我们把添加头后的image通常叫uImage，uImage是可以被u-boot直接引导的内核镜像。

mkimage工具的使用介绍如下：

使用: 中括号括起来的是可选的
mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image
选项：
-A：set architecture to 'arch' //用于指定CPU类型，比如ARM
-O：set operating system to 'os' //用于指定操作系统，比如Linux
-T：set image type to 'type' //用于指定image类型，比如Kernel
-C：set compression type 'comp' //指定压缩类型
-a：set load address to 'addr' (hex) //指定image的载入地址
-e：set entry point to 'ep' (hex) //内核的入口地址，一般为image的载入地址+0x40（信息头的大小）
-n：set image name to 'name' //image在头结构中的命名
-d：use image data from 'datafile' //无头信息的image文件名
-x：set XIP (execute in place) //设置执行位置

先将u-boot下的tools中的mkimage复制到主机的/usr/local/bin目录下，这样就可以在主机的任何目录下使用该工具了。

首先请确认你的uboot配置信息是否与我上面说到的一致，很重中，决定成败

现在我们进入kernel生成目录(一般是arch/arm/boot目录)，然后执行如下命令，就会在该目录下生成一个uImage.img的镜像文件，把他复制到你的nfs配置好的目录下，我的是/root/tftpboot，这就是我们所说的uImage。当然你现在不想编译内核也没有关系，使用mini2440自带的image，我的是zImage_W35，打开终端，现操作如下：

root@ubuntu:~/tftpboot# lsfile  rootfs  u-boot.bin  uImage  zImage_W35root@ubuntu:~/tftpboot# mkimage -n 'mini2440_linux' -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage_W35 w35_image.imgImage Name:   mini2440_linuxCreated:      Fri Jun 21 08:37:58 2013Image Type:   ARM Linux Kernel Image (uncompressed)Data Size:    2266616 Bytes = 2213.49 kB = 2.16 MBLoad Address: 30008000Entry Point:  30008040root@ubuntu:~/tftpboot# lsfile  rootfs  u-boot.bin  uImage  w35_image.img  zImage_W35root@ubuntu:~/tftpboot# chmod 777 w35_image.img root@ubuntu:~/tftpboot# lsfile  rootfs  u-boot.bin  uImage  w35_image.img  zImage_W35root@ubuntu:~/tftpboot#

一定要记住修改文件的可执行权限，否则下载时可能提示你找不到文件，我最终生成的image名字就是w35_image.img

接下来你可以重启开发板看结果了

U-Boot 2010.03 (Jun 20 2013 - 08:43:59)Modified by Wang,Hai-Tao ([e-mail])Study Linux and love linux forever!!Study u-bootI2C:   readyDRAM:  64 MBFlash:  2 MBNAND:  256 MiBVideo: 240x320x16 20kHz 62HzIn:    serialOut:   serialErr:   serialUSB slave is enable!Net:   dm9000Hit any key to stop autoboot:  0 dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit modeMAC: 08:08:11:18:12:27operating at 100M full duplex modeUsing dm9000 deviceFile transfer via NFS from server 192.168.1.103; our IP address is 192.168.1.102Filename '/root/tftpboot/w35_image.img'.Load address: 0x30008000Loading: #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #####################################################doneBytes transferred = 2266680 (229638 hex)## Booting kernel from Legacy Image at 30008000 ...   Image Name:   mini2440   Created:      2013-06-20  16:34:41 UTC   Image Type:   ARM Linux Kernel Image (uncompressed)   Data Size:    2266616 Bytes =  2.2 MB   Load Address: 30008000   Entry Point:  30008040   Verifying Checksum ... OK   XIP Kernel Image ... OKOKStarting kernel ...Uncompressing Linux................................................................................................................................................... done, booting the kernel.Linux version 2.6.32.2-FriendlyARM ([e-mail]) (gcc version 4.4.3 (ctng-1.6.1) ) #18 Wed Apr 13 20:06:31 HKT 2011CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177CPU: VIVT data cache, VIVT instruction cacheMachine: FriendlyARM Mini2440 development boardMemory policy: ECC disabled, Data cache writebackCPU S3C2440A (id 0x32440001)S3C24XX Clocks, (c) 2004 Simtec ElectronicsS3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHzCLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL onBuilt 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.103:/root/tftpboot/rootfs ip=192.168.1.102:192.168.1.1::255.255.255.0 console=ttySAC0,115200 init=/linuxrc mem=64MPID 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 totalMemory: 60084KB available (4176K code, 451K data, 156K init, 0K highmem)SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1Hierarchical RCU implementation.NR_IRQS:85irq: clearing pending status 02000000irq: clearing subpending status 00000002Console: colour dummy device 80x30console [ttySAC0] enabledCalibrating delay loop... 201.93 BogoMIPS (lpj=504832)Mount-cache hash table entries: 512CPU: Testing write buffer coherency: okNET: Registered protocol family 16S3C2440: Initialising architectureS3C2440: IRQ SupportS3C24XX DMA Driver, (c) 2003-2004,2006 Simtec ElectronicsDMA channel 0 at c4808000, irq 33DMA channel 1 at c4808040, irq 34DMA channel 2 at c4808080, irq 35DMA channel 3 at c48080c0, irq 36S3C244X: Clock Support, DVS offbio: create slab <bio-0> at 0SCSI subsystem initializedusbcore: registered new interface driver usbfsusbcore: registered new interface driver hubusbcore: registered new device driver usbs3c-i2c s3c2440-i2c: slave address 0x10s3c-i2c s3c2440-i2c: bus frequency set to 98 KHzs3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapterNET: Registered protocol family 2IP 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 registeredNET: Registered protocol family 1RPC: Registered udp transport module.RPC: Registered tcp transport module.RPC: Registered tcp NFSv4.1 backchannel transport module.NetWinder Floating Point Emulator V0.97 (double precision)yaffs Apr 13 2011 18:29:56 Installing. msgmni has been set to 117alg: No test for stdrng (krng)io scheduler noop registered (default)Console: switching to colour frame buffer device 40x15fb0: s3c2410fb frame buffer devicebacklight       initializedleds    initializedbuttons initializedpwm     initializedadc     initializeds3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440loop: module loadedS3C24XX NAND Driver, (c) 2004 Simtec Electronicss3c24xx-nand s3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29nss3c24xx-nand s3c2440-nand: NAND soft ECCNAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-bit)Scanning device for bad blocksCreating 5 MTD partitions on "NAND 256MiB 3,3V 8-bit":0x000000000000-0x000000040000 : "supervivi"0x000000040000-0x000000060000 : "param"0x000000060000-0x000000560000 : "Kernel"0x000000560000-0x000040560000 : "root"mtd: partition "root" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0xfaa00000x000000000000-0x000040000000 : "nand"mtd: partition "nand" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0x10000000dm9000 Ethernet Driver, V1.31eth0: dm9000e at c4814300,c4818304 IRQ 51 MAC: 08:90:90:90:90:90 (chip)ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Drivers3c2410-ohci s3c2410-ohci: S3C24XX OHCIs3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000usb usb1: New USB device found, idVendor=1d6b, idProduct=0001usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1usb usb1: Product: S3C24XX OHCIusb usb1: Manufacturer: Linux 2.6.32.2-FriendlyARM ohci_hcdusb usb1: SerialNumber: s3c24xxusb usb1: configuration #1 chosen from 1 choicehub 1-0:1.0: USB hub foundhub 1-0:1.0: 2 ports detectedInitializing USB Mass Storage driver...usbcore: registered new interface driver usb-storageUSB Mass Storage support registered.usbcore: registered new interface driver ums-alaudausbcore: registered new interface driver ums-cypressusbcore: registered new interface driver ums-datafabusbcore: registered new interface driver ums-freecomusbcore: registered new interface driver ums-isd200usbcore: registered new interface driver ums-jumpshotusbcore: registered new interface driver ums-karmausbcore: registered new interface driver ums-onetouchusbcore: registered new interface driver ums-sddr09usbcore: registered new interface driver ums-sddr55usbcore: registered new interface driver ums-usbatusbcore: registered new interface driver usbserialUSB Serial support registered for genericusbcore: registered new interface driver usbserial_genericusbserial: USB Serial Driver coreUSB Serial support registered for aircableusbcore: registered new interface driver aircableUSB Serial support registered for ark3116usbcore: registered new interface driver ark3116USB Serial support registered for Belkin / Peracom / GoHubs USB Serial Adapterusbcore: registered new interface driver belkinbelkin_sa: v1.2:USB Belkin Serial converter driverUSB Serial support registered for ch341-uartusbcore: registered new interface driver ch341USB Serial support registered for cp210xusbcore: registered new interface driver cp210xcp210x: v0.09:Silicon Labs CP210x RS232 serial adaptor driverUSB Serial support registered for Reiner SCT Cyberjack USB card readerusbcore: registered new interface driver cyberjackcyberjack: v1.01 Matthias Bruestlecyberjack: REINER SCT cyberJack pinpad/e-com USB Chipcard Reader DriverUSB Serial support registered for DeLorme Earthmate USBUSB Serial support registered for HID->COM RS232 AdapterUSB Serial support registered for Nokia CA-42 V2 Adapterusbcore: registered new interface driver cypresscypress_m8: v1.09:Cypress USB to Serial DriverUSB Serial support registered for Digi 2 port USB adapterUSB Serial support registered for Digi 4 port USB adapterusbcore: registered new interface driver digi_acceleportdigi_acceleport: v1.80.1.2:Digi AccelePort USB-2/USB-4 Serial Converter driverUSB Serial support registered for Edgeport 2 port adapterUSB Serial support registered for Edgeport 4 port adapterUSB Serial support registered for Edgeport 8 port adapterUSB Serial support registered for EPiC deviceusbcore: registered new interface driver io_edgeportio_edgeport: v2.7:Edgeport USB Serial DriverUSB Serial support registered for Edgeport TI 1 port adapterUSB Serial support registered for Edgeport TI 2 port adapterusbcore: registered new interface driver io_tiio_ti: v0.7mode043006:Edgeport USB Serial DriverUSB Serial support registered for empegusbcore: registered new interface driver empegempeg: v1.2:USB Empeg Mark I/II DriverUSB Serial support registered for FTDI USB Serial Deviceusbcore: registered new interface driver ftdi_sioftdi_sio: v1.5.0:USB FTDI Serial Converters DriverUSB Serial support registered for funsoftusbcore: registered new interface driver funsoftUSB Serial support registered for Garmin GPS usb/ttyusbcore: registered new interface driver garmin_gpsgarmin_gps: v0.33:garmin gps driverUSB Serial support registered for hp4Xusbcore: registered new interface driver hp4Xhp4x: v1.00:HP4x (48/49) Generic Serial driverUSB Serial support registered for PocketPC PDAusbcore: registered new interface driver ipaqipaq: v0.5:USB PocketPC PDA driverUSB Serial support registered for IPWireless converterusbcore: registered new interface driver ipwttyipw: v0.3:IPWireless tty driverUSB Serial support registered for IR Dongleusbcore: registered new interface driver ir-usbir_usb: v0.4:USB IR Dongle driverUSB Serial support registered for iuu_phoenixusbcore: registered new interface driver iuu_phoenixiuu_phoenix: v0.11:Infinity USB Unlimited Phoenix driverUSB Serial support registered for Keyspan - (without firmware)USB Serial support registered for Keyspan 1 port adapterUSB Serial support registered for Keyspan 2 port adapterUSB Serial support registered for Keyspan 4 port adapterusbcore: registered new interface driver keyspankeyspan: v1.1.5:Keyspan USB to Serial Converter DriverUSB Serial support registered for Keyspan PDAUSB Serial support registered for Keyspan PDA - (prerenumeration)USB Serial support registered for Xircom / Entregra PGS - (prerenumeration)usbcore: registered new interface driver keyspan_pdakeyspan_pda: v1.1:USB Keyspan PDA Converter driverUSB Serial support registered for KL5KUSB105D / PalmConnectusbcore: registered new interface driver kl5kusb105dkl5kusb105: v0.3a:KLSI KL5KUSB105 chipset USB->Serial Converter driverUSB Serial support registered for KOBIL USB smart card terminalusbcore: registered new interface driver kobilkobil_sct: 21/05/2004:KOBIL USB Smart Card Terminal Driver (experimental)USB Serial support registered for MCT U232usbcore: registered new interface driver mct_u232mct_u232: z2.1:Magic Control Technology USB-RS232 converter driverUSB Serial support registered for Moschip 2 port adaptermos7720: 1.0.0.4F:Moschip USB Serial Driverusbcore: registered new interface driver moschip7720USB Serial support registered for Moschip 7840/7820 USB Serial Drivermos7840: 1.3.2:Moschip 7840/7820 USB Serial Driverusbcore: registered new interface driver mos7840USB Serial support registered for moto-modemusbcore: registered new interface driver moto-modemUSB Serial support registered for navmanusbcore: registered new interface driver navmanUSB Serial support registered for ZyXEL - omni.net lcd plus usbusbcore: registered new interface driver omninetomninet: v1.1:USB ZyXEL omni.net LCD PLUS DriverUSB Serial support registered for opticonusbcore: registered new interface driver opticonUSB Serial support registered for GSM modem (1-port)usbcore: registered new interface driver optionoption: v0.7.2:USB Driver for GSM modemsUSB Serial support registered for oti6858usbcore: registered new interface driver oti6858USB Serial support registered for pl2303usbcore: registered new interface driver pl2303pl2303: Prolific PL2303 USB to serial adaptor driverUSB Serial support registered for Qualcomm USB modemusbcore: registered new interface driver qcserialsafe_serial: v0.0b:USB Safe Encapsulated SerialUSB Serial support registered for safe_serialusbcore: registered new interface driver safe_serialUSB Serial support registered for siemens_mpiusbcore: registered new interface driver siemens_mpiDriver for Siemens USB/MPI adapterVersion 0.1 09/26/2005 Thomas [e-mail] http://libnodave.sf.netUSB Serial support registered for Sierra USB modemusbcore: registered new interface driver sierrasierra: v.1.3.8:USB Driver for Sierra Wireless USB modemsUSB Serial support registered for SPCP8x5usbcore: registered new interface driver spcp8x5spcp8x5: v0.04:SPCP8x5 USB to serial adaptor driverUSB Serial support registered for symbolusbcore: registered new interface driver symbolUSB Serial support registered for TI USB 3410 1 port adapterUSB Serial support registered for TI USB 5052 2 port adapterusbcore: registered new interface driver ti_usb_3410_5052ti_usb_3410_5052: v0.9:TI USB 3410/5052 Serial DriverUSB Serial support registered for Handspring Visor / Palm OSUSB Serial support registered for Sony Clie 3.5USB Serial support registered for Sony Clie 5.0usbcore: registered new interface driver visorvisor: USB HandSpring Visor / Palm OS driverUSB Serial support registered for Connect Tech - WhiteHEAT - (prerenumeration)USB Serial support registered for Connect Tech - WhiteHEATusbcore: registered new interface driver whiteheatwhiteheat: v2.0:USB ConnectTech WhiteHEAT drivermice: PS/2 mouse device common for all mices3c2410 TouchScreen successfully loadedinput: s3c2410 TouchScreen as /devices/virtual/input/input0S3C24XX RTC, (c) 2004,2006 Simtec Electronicss3c2410-rtc s3c2410-rtc: rtc disabled, re-enablings3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0i2c /dev entries driverLinux video capture interface: v2.00gspca: main v2.7.0 registeredusbcore: registered new interface driver conexconex: registeredusbcore: registered new interface driver etomsetoms: registeredusbcore: registered new interface driver finepixfinepix: registeredusbcore: registered new interface driver jeilinjjeilinj: registeredusbcore: registered new interface driver marsmars: registeredusbcore: registered new interface driver mr97310amr97310a: registeredusbcore: registered new interface driver ov519ov519: registeredusbcore: registered new interface driver ov534ov534: registeredusbcore: registered new interface driver pac207pac207: registeredusbcore: registered new interface driver pac7311pac7311: registeredusbcore: registered new interface driver sn9c20xsn9c20x: registeredusbcore: registered new interface driver sonixbsonixb: registeredusbcore: registered new interface driver sonixjsonixj: registeredusbcore: registered new interface driver spca500spca500: registeredusbcore: registered new interface driver spca501spca501: registeredusbcore: registered new interface driver spca505spca505: registeredusbcore: registered new interface driver spca506spca506: registeredusbcore: registered new interface driver spca508spca508: registeredusbcore: registered new interface driver spca561spca561: registeredusbcore: registered new interface driver sq905sq905: registeredusbcore: registered new interface driver sq905csq905c: registeredusbcore: registered new interface driver sunplussunplus: registeredusbcore: registered new interface driver stk014stk014: registeredusbcore: registered new interface driver t613t613: registeredusbcore: registered new interface driver tv8532tv8532: registeredusbcore: registered new interface driver vc032xvc032x: registeredusbcore: registered new interface driver zc3xxzc3xx: registeredusbcore: registered new interface driver ALi m5602ALi m5602: registeredusbcore: registered new interface driver STV06xxSTV06xx: registeredgspca_gl860: driver startup - version 0.9d10usbcore: registered new interface driver gspca_gl860gspca_gl860: driver registeredusbcore: registered new interface driver uvcvideoUSB Video Class driver (v0.1.0)initializing s3c2440 camera interface......s3c2440 camif init doneLoading OV9650 driver.........SCCB address 0x60, manufacture ID 0xFFFF, expect 0x7FA2SCCB address 0x60, manufacture ID 0xFFFF, expect 0x7FA2No OV9650 found!!!S3C2410 Watchdog Timer, (c) 2004 Simtec Electronicss3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enableds3c-sdi s3c2440-sdi: powered down.s3c-sdi s3c2440-sdi: mmc0 - using pio, sw SDIO IRQusbcore: registered new interface driver usbhidusbhid: v2.6:USB HID core driverAdvanced Linux Sound Architecture Driver Version 1.0.21.No device for DAI UDA134XNo device for DAI s3c24xx-i2sS3C24XX_UDA134X SoC Audio driverUDA134X SoC Audio Codecasoc: UDA134X <-> s3c24xx-i2s mapping okALSA device list:  #0: S3C24XX_UDA134X (UDA134X)TCP cubic registeredNET: Registered protocol family 17s3c2410-rtc s3c2410-rtc: setting system clock to 2007-10-30 02:00:47 UTC (1193709647)eth0: link down

这个时候内核已经可以正常启动了，但是因为没有文件系统，所以最后系统就卡在那里了，没动静了

下一步就开始创建文件系统，并挂载文件系统

5、制作nfs启动的根文件系统

首先请确认你的uboot配置信息是否与我上面说到的一致，很重中，决定成败

再次检查配置服务器nfs路径

 vi /etc/exports 

/root/tftpboot  *(rw,sync,no_root_squash)   

其中/root/tftpboot：允许开发板或其他计算机访问的目录，这里允许所有客户端访问

r'w：文件系统可读可写，

sync：同步写磁盘（async：资料会先暂存于内存当中，而非直接写入磁盘）

创建文件系统需要使用busybox，另外，文件系统etc目录下需要不少的配置，这里打包好供大家下载

下载busybox，分享下载地址：busybox1.3.3

ect目录脚本文件，分享下载地址：etc.tar

下载后，放在linux下的一个新建的目录里面。

接下来，创建根文件系统目录

在nfs服务器根目录：/root/tftpboot下，创建rootfs目录，以及根文件系统的各个目录。

[root@www tftpboot]# mkdir rootfs  [root@www tftpboot]# cd rootfs  [root@www rootfs]# mkdir bin dev etc lib proc sbin sys usr mnt tmp var  [root@www rootfs]# mkdir usr/bin usr/lib usr/sbin lib/modules

内核在引导根文件系统时候，需要用到设备节点console和null，因此，在这里还要创建设备文件

[root@www rootfs]# cd dev/  [root@www dev]# mknod -m 666 console c 5 1  [root@www dev]# mknod -m 666 null c 1 3 

将etc包（上面的地址有）解压到/nfsroot/rootfs里面

[root@www 4-3-2]# tar -xvz -f etc.tar.gz -C /root/tftpboot/rootfs  [root@www 4-3-2]# ls /root/tftpboot/rootfs/etc/  fstab  init.d  inittab  profile

接下来很重要的一步，编译内核模块，将内核模块安装到根文件系统（我用的是友善提供的内核linux-2.6.32.2）

到内核根目录下，首先执行命令：

make modules ARCH=arm CROSS_COMPILE=arm-linux-

编译完成，接着执行命令：

make modules_install ARCH=arm INSTALL_MOD_PATH=/root/tftpboot/rootfs

最后到下面路径查看是否安装成功

root@ubuntu:~# cd tftpboot/rootfs/lib/modules/root@ubuntu:~/tftpboot/rootfs/lib/modules# ls2.6.32.2root@ubuntu:~/tftpboot/rootfs/lib/modules# 

产生2.6.32.2的modules，说明执行成功

紧接就是编译busybox了

6、busybox配置，编译

到busybox的根目录下执行make menuconfig

进入图形化配置界面后：

1）、进入"Busybox Settings"-->"Build Options "，选中“Build Busybox as a static binary”（直接按键盘空格键到“*”）。注意：这里是静态链接。

2）、同时在“Build Busybox as a static binary”同一个页面的下面“ Cross Compiler prefix”，按键盘Enter键进入，然后输入：“arm-linux-” ，这时出现如下的图示：

3）、进入"Busybox Settings"-->"Installation Options"，选中“Don‘t use /user”（这是为了不将busybox安装在/usr/sbin目录下）；同时，在同一个页面下的“ BusyBox installation prefix ”添加安装路径：“/nfsroot/rootfs”，如下图所示：

编译和安装busybox，首先执行：

make ARCH=arm CROSS_COMPILE=arm-linux-

编译完成之后运行：

 make install

最后检查busybox是否安装好，具体方法为：查看/nfsroot/rootfs/sbin目录下是否有init存在。注意：如果init不存在说明busybox没有安装好，那么根文件系统是不能用的，这个时候，可以换个busybox试试

root@ubuntu:~/tftpboot/rootfs/sbin# lsadjtimex  crond       fbset        fsck.minix  ifconfig   insmod    lpd         mkswap      raidautorun  route       slattach           switch_root  vconfigarp       depmod      fbsplash     getty       ifdown     klogd     lsmod       modprobe    rdate        runlevel    start-stop-daemon  sysctl       watchdogblkid     devmem      fdisk        halt        ifenslave  loadfont  makedevs    nameif      rdev         sendmail    sulogin            syslogd      zcipbrctl     dhcprelay   findfs       hdparm      ifup       loadkmap  man         pivot_root  readprofile  setconsole  svlogd             telnetdchpasswd  dnsd        freeramdisk  httpd       inetd      logread   mdev        popmaildir  reboot       setfont     swapoff            udhcpcchroot    fakeidentd  fsck         hwclock     init       losetup   mkfs.minix  poweroff    rmmod        setlogcons  swapon             udhcpdroot@ubuntu:~/tftpboot/rootfs/sbin# 

这样，就完成了根文件系统的制作

到这了内核image和文件系统都已经制作完毕，内核image名称w35_image.img在/root/tftpboot/目录下，文件系统在/root/tftpboot/rootfs目录下，现在你可以重新启动你的开发板了

[u-boot@MINI2440]# printenvbootdelay=5baudrate=115200ethaddr=08:08:11:18:12:27netmask=255.255.255.0tekkaman=bmp d 70000 stdin=serialstdout=serialstderr=serialethact=dm9000ipaddr=192.168.1.102serverip=192.168.1.103gatewayip=192.168.1.1bootcmd=nfs 0x30008000 192.168.1.103:/root/tftpboot/w35_image.img ;bootm 30008000bootargs=root=/dev/nfs rw nfsroot=192.168.1.103:/root/tftpboot/rootfs ip=192.168.1.102:192.168.1.1::255.255.255.0 console=ttySAC0,115200 init=/linuxrc mem=64MEnvironment size: 460/131068 bytes[u-boot@MINI2440]# tU-Boot 2010.03 (Jun 20 2013 - 08:43:59)Modified by Wang,Hai-Tao ([e-mail])Study Linux and love linux forever!!Study u-bootI2C:   readyDRAM:  64 MBFlash:  2 MBNAND:  256 MiBVideo: 240x320x16 20kHz 62HzIn:    serialOut:   serialErr:   serialUSB slave is enable!Net:   dm9000Hit any key to stop autoboot:  0 dm9000 i/o: 0x20000300, id: 0x90000a46 DM9000: running in 16 bit modeMAC: 08:08:11:18:12:27operating at 100M full duplex modeUsing dm9000 deviceFile transfer via NFS from server 192.168.1.103; our IP address is 192.168.1.102Filename '/root/tftpboot/w35_image.img'.Load address: 0x30008000Loading: #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #################################################################         #####################################################doneBytes transferred = 2266680 (229638 hex)## Booting kernel from Legacy Image at 30008000 ...   Image Name:   mini2440   Created:      2013-06-20  16:34:41 UTC   Image Type:   ARM Linux Kernel Image (uncompressed)   Data Size:    2266616 Bytes =  2.2 MB   Load Address: 30008000   Entry Point:  30008040   Verifying Checksum ... OK   XIP Kernel Image ... OKOKStarting kernel ...Uncompressing Linux................................................................................................................................................... done, booting the kernel.Linux version 2.6.32.2-FriendlyARM ([e-mail]) (gcc version 4.4.3 (ctng-1.6.1) ) #18 Wed Apr 13 20:06:31 HKT 2011CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177CPU: VIVT data cache, VIVT instruction cacheMachine: FriendlyARM Mini2440 development boardMemory policy: ECC disabled, Data cache writebackCPU S3C2440A (id 0x32440001)S3C24XX Clocks, (c) 2004 Simtec ElectronicsS3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHzCLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL onBuilt 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.103:/root/tftpboot/rootfs ip=192.168.1.102:192.168.1.1::255.255.255.0 console=ttySAC0,115200 init=/linuxrc mem=64MPID 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 totalMemory: 60084KB available (4176K code, 451K data, 156K init, 0K highmem)SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1Hierarchical RCU implementation.NR_IRQS:85irq: clearing pending status 02000000irq: clearing subpending status 00000002Console: colour dummy device 80x30console [ttySAC0] enabledCalibrating delay loop... 201.93 BogoMIPS (lpj=504832)Mount-cache hash table entries: 512CPU: Testing write buffer coherency: okNET: Registered protocol family 16S3C2440: Initialising architectureS3C2440: IRQ SupportS3C24XX DMA Driver, (c) 2003-2004,2006 Simtec ElectronicsDMA channel 0 at c4808000, irq 33DMA channel 1 at c4808040, irq 34DMA channel 2 at c4808080, irq 35DMA channel 3 at c48080c0, irq 36S3C244X: Clock Support, DVS offbio: create slab <bio-0> at 0SCSI subsystem initializedusbcore: registered new interface driver usbfsusbcore: registered new interface driver hubusbcore: registered new device driver usbs3c-i2c s3c2440-i2c: slave address 0x10s3c-i2c s3c2440-i2c: bus frequency set to 98 KHzs3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapterNET: Registered protocol family 2IP 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 registeredNET: Registered protocol family 1RPC: Registered udp transport module.RPC: Registered tcp transport module.RPC: Registered tcp NFSv4.1 backchannel transport module.NetWinder Floating Point Emulator V0.97 (double precision)yaffs Apr 13 2011 18:29:56 Installing. msgmni has been set to 117alg: No test for stdrng (krng)io scheduler noop registered (default)Console: switching to colour frame buffer device 40x15fb0: s3c2410fb frame buffer devicebacklight       initializedleds    initializedbuttons initializedpwm     initializedadc     initializeds3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440loop: module loadedS3C24XX NAND Driver, (c) 2004 Simtec Electronicss3c24xx-nand s3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29nss3c24xx-nand s3c2440-nand: NAND soft ECCNAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-bit)Scanning device for bad blocksCreating 5 MTD partitions on "NAND 256MiB 3,3V 8-bit":0x000000000000-0x000000040000 : "supervivi"0x000000040000-0x000000060000 : "param"0x000000060000-0x000000560000 : "Kernel"0x000000560000-0x000040560000 : "root"mtd: partition "root" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0xfaa00000x000000000000-0x000040000000 : "nand"mtd: partition "nand" extends beyond the end of device "NAND 256MiB 3,3V 8-bit" -- size truncated to 0x10000000dm9000 Ethernet Driver, V1.31eth0: dm9000e at c4814300,c4818304 IRQ 51 MAC: 08:90:90:90:90:90 (chip)ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Drivers3c2410-ohci s3c2410-ohci: S3C24XX OHCIs3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000usb usb1: New USB device found, idVendor=1d6b, idProduct=0001usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1usb usb1: Product: S3C24XX OHCIusb usb1: Manufacturer: Linux 2.6.32.2-FriendlyARM ohci_hcdusb usb1: SerialNumber: s3c24xxusb usb1: configuration #1 chosen from 1 choicehub 1-0:1.0: USB hub foundhub 1-0:1.0: 2 ports detectedInitializing USB Mass Storage driver...usbcore: registered new interface driver usb-storageUSB Mass Storage support registered.usbcore: registered new interface driver ums-alaudausbcore: registered new interface driver ums-cypressusbcore: registered new interface driver ums-datafabusbcore: registered new interface driver ums-freecomusbcore: registered new interface driver ums-isd200usbcore: registered new interface driver ums-jumpshotusbcore: registered new interface driver ums-karmausbcore: registered new interface driver ums-onetouchusbcore: registered new interface driver ums-sddr09usbcore: registered new interface driver ums-sddr55usbcore: registered new interface driver ums-usbatusbcore: registered new interface driver usbserialUSB Serial support registered for genericusbcore: registered new interface driver usbserial_genericusbserial: USB Serial Driver coreUSB Serial support registered for aircableusbcore: registered new interface driver aircableUSB Serial support registered for ark3116usbcore: registered new interface driver ark3116USB Serial support registered for Belkin / Peracom / GoHubs USB Serial Adapterusbcore: registered new interface driver belkinbelkin_sa: v1.2:USB Belkin Serial converter driverUSB Serial support registered for ch341-uartusbcore: registered new interface driver ch341USB Serial support registered for cp210xusbcore: registered new interface driver cp210xcp210x: v0.09:Silicon Labs CP210x RS232 serial adaptor driverUSB Serial support registered for Reiner SCT Cyberjack USB card readerusbcore: registered new interface driver cyberjackcyberjack: v1.01 Matthias Bruestlecyberjack: REINER SCT cyberJack pinpad/e-com USB Chipcard Reader DriverUSB Serial support registered for DeLorme Earthmate USBUSB Serial support registered for HID->COM RS232 AdapterUSB Serial support registered for Nokia CA-42 V2 Adapterusbcore: registered new interface driver cypresscypress_m8: v1.09:Cypress USB to Serial DriverUSB Serial support registered for Digi 2 port USB adapterUSB Serial support registered for Digi 4 port USB adapterusbcore: registered new interface driver digi_acceleportdigi_acceleport: v1.80.1.2:Digi AccelePort USB-2/USB-4 Serial Converter driverUSB Serial support registered for Edgeport 2 port adapterUSB Serial support registered for Edgeport 4 port adapterUSB Serial support registered for Edgeport 8 port adapterUSB Serial support registered for EPiC deviceusbcore: registered new interface driver io_edgeportio_edgeport: v2.7:Edgeport USB Serial DriverUSB Serial support registered for Edgeport TI 1 port adapterUSB Serial support registered for Edgeport TI 2 port adapterusbcore: registered new interface driver io_tiio_ti: v0.7mode043006:Edgeport USB Serial DriverUSB Serial support registered for empegusbcore: registered new interface driver empegempeg: v1.2:USB Empeg Mark I/II DriverUSB Serial support registered for FTDI USB Serial Deviceusbcore: registered new interface driver ftdi_sioftdi_sio: v1.5.0:USB FTDI Serial Converters DriverUSB Serial support registered for funsoftusbcore: registered new interface driver funsoftUSB Serial support registered for Garmin GPS usb/ttyusbcore: registered new interface driver garmin_gpsgarmin_gps: v0.33:garmin gps driverUSB Serial support registered for hp4Xusbcore: registered new interface driver hp4Xhp4x: v1.00:HP4x (48/49) Generic Serial driverUSB Serial support registered for PocketPC PDAusbcore: registered new interface driver ipaqipaq: v0.5:USB PocketPC PDA driverUSB Serial support registered for IPWireless converterusbcore: registered new interface driver ipwttyipw: v0.3:IPWireless tty driverUSB Serial support registered for IR Dongleusbcore: registered new interface driver ir-usbir_usb: v0.4:USB IR Dongle driverUSB Serial support registered for iuu_phoenixusbcore: registered new interface driver iuu_phoenixiuu_phoenix: v0.11:Infinity USB Unlimited Phoenix driverUSB Serial support registered for Keyspan - (without firmware)USB Serial support registered for Keyspan 1 port adapterUSB Serial support registered for Keyspan 2 port adapterUSB Serial support registered for Keyspan 4 port adapterusbcore: registered new interface driver keyspankeyspan: v1.1.5:Keyspan USB to Serial Converter DriverUSB Serial support registered for Keyspan PDAUSB Serial support registered for Keyspan PDA - (prerenumeration)USB Serial support registered for Xircom / Entregra PGS - (prerenumeration)usbcore: registered new interface driver keyspan_pdakeyspan_pda: v1.1:USB Keyspan PDA Converter driverUSB Serial support registered for KL5KUSB105D / PalmConnectusbcore: registered new interface driver kl5kusb105dkl5kusb105: v0.3a:KLSI KL5KUSB105 chipset USB->Serial Converter driverUSB Serial support registered for KOBIL USB smart card terminalusbcore: registered new interface driver kobilkobil_sct: 21/05/2004:KOBIL USB Smart Card Terminal Driver (experimental)USB Serial support registered for MCT U232usbcore: registered new interface driver mct_u232mct_u232: z2.1:Magic Control Technology USB-RS232 converter driverUSB Serial support registered for Moschip 2 port adaptermos7720: 1.0.0.4F:Moschip USB Serial Driverusbcore: registered new interface driver moschip7720USB Serial support registered for Moschip 7840/7820 USB Serial Drivermos7840: 1.3.2:Moschip 7840/7820 USB Serial Driverusbcore: registered new interface driver mos7840USB Serial support registered for moto-modemusbcore: registered new interface driver moto-modemUSB Serial support registered for navmanusbcore: registered new interface driver navmanUSB Serial support registered for ZyXEL - omni.net lcd plus usbusbcore: registered new interface driver omninetomninet: v1.1:USB ZyXEL omni.net LCD PLUS DriverUSB Serial support registered for opticonusbcore: registered new interface driver opticonUSB Serial support registered for GSM modem (1-port)usbcore: registered new interface driver optionoption: v0.7.2:USB Driver for GSM modemsUSB Serial support registered for oti6858usbcore: registered new interface driver oti6858USB Serial support registered for pl2303usbcore: registered new interface driver pl2303pl2303: Prolific PL2303 USB to serial adaptor driverUSB Serial support registered for Qualcomm USB modemusbcore: registered new interface driver qcserialsafe_serial: v0.0b:USB Safe Encapsulated SerialUSB Serial support registered for safe_serialusbcore: registered new interface driver safe_serialUSB Serial support registered for siemens_mpiusbcore: registered new interface driver siemens_mpiDriver for Siemens USB/MPI adapterVersion 0.1 09/26/2005 Thomas [e-mail] http://libnodave.sf.netUSB Serial support registered for Sierra USB modemusbcore: registered new interface driver sierrasierra: v.1.3.8:USB Driver for Sierra Wireless USB modemsUSB Serial support registered for SPCP8x5usbcore: registered new interface driver spcp8x5spcp8x5: v0.04:SPCP8x5 USB to serial adaptor driverUSB Serial support registered for symbolusbcore: registered new interface driver symbolUSB Serial support registered for TI USB 3410 1 port adapterUSB Serial support registered for TI USB 5052 2 port adapterusbcore: registered new interface driver ti_usb_3410_5052ti_usb_3410_5052: v0.9:TI USB 3410/5052 Serial DriverUSB Serial support registered for Handspring Visor / Palm OSUSB Serial support registered for Sony Clie 3.5USB Serial support registered for Sony Clie 5.0usbcore: registered new interface driver visorvisor: USB HandSpring Visor / Palm OS driverUSB Serial support registered for Connect Tech - WhiteHEAT - (prerenumeration)USB Serial support registered for Connect Tech - WhiteHEATusbcore: registered new interface driver whiteheatwhiteheat: v2.0:USB ConnectTech WhiteHEAT drivermice: PS/2 mouse device common for all mices3c2410 TouchScreen successfully loadedinput: s3c2410 TouchScreen as /devices/virtual/input/input0S3C24XX RTC, (c) 2004,2006 Simtec Electronicss3c2410-rtc s3c2410-rtc: rtc disabled, re-enablings3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0i2c /dev entries driverLinux video capture interface: v2.00gspca: main v2.7.0 registeredusbcore: registered new interface driver conexconex: registeredusbcore: registered new interface driver etomsetoms: registeredusbcore: registered new interface driver finepixfinepix: registeredusbcore: registered new interface driver jeilinjjeilinj: registeredusbcore: registered new interface driver marsmars: registeredusbcore: registered new interface driver mr97310amr97310a: registeredusbcore: registered new interface driver ov519ov519: registeredusbcore: registered new interface driver ov534ov534: registeredusbcore: registered new interface driver pac207pac207: registeredusbcore: registered new interface driver pac7311pac7311: registeredusbcore: registered new interface driver sn9c20xsn9c20x: registeredusbcore: registered new interface driver sonixbsonixb: registeredusbcore: registered new interface driver sonixjsonixj: registeredusbcore: registered new interface driver spca500spca500: registeredusbcore: registered new interface driver spca501spca501: registeredusbcore: registered new interface driver spca505spca505: registeredusbcore: registered new interface driver spca506spca506: registeredusbcore: registered new interface driver spca508spca508: registeredusbcore: registered new interface driver spca561spca561: registeredusbcore: registered new interface driver sq905sq905: registeredusbcore: registered new interface driver sq905csq905c: registeredusbcore: registered new interface driver sunplussunplus: registeredusbcore: registered new interface driver stk014stk014: registeredusbcore: registered new interface driver t613t613: registeredusbcore: registered new interface driver tv8532tv8532: registeredusbcore: registered new interface driver vc032xvc032x: registeredusbcore: registered new interface driver zc3xxzc3xx: registeredusbcore: registered new interface driver ALi m5602ALi m5602: registeredusbcore: registered new interface driver STV06xxSTV06xx: registeredgspca_gl860: driver startup - version 0.9d10usbcore: registered new interface driver gspca_gl860gspca_gl860: driver registeredusbcore: registered new interface driver uvcvideoUSB Video Class driver (v0.1.0)initializing s3c2440 camera interface......s3c2440 camif init doneLoading OV9650 driver.........SCCB address 0x60, manufacture ID 0xFFFF, expect 0x7FA2SCCB address 0x60, manufacture ID 0xFFFF, expect 0x7FA2No OV9650 found!!!S3C2410 Watchdog Timer, (c) 2004 Simtec Electronicss3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enableds3c-sdi s3c2440-sdi: powered down.s3c-sdi s3c2440-sdi: mmc0 - using pio, sw SDIO IRQusbcore: registered new interface driver usbhidusbhid: v2.6:USB HID core driverAdvanced Linux Sound Architecture Driver Version 1.0.21.No device for DAI UDA134XNo device for DAI s3c24xx-i2sS3C24XX_UDA134X SoC Audio driverUDA134X SoC Audio Codecasoc: UDA134X <-> s3c24xx-i2s mapping okALSA device list:  #0: S3C24XX_UDA134X (UDA134X)TCP cubic registeredNET: Registered protocol family 17s3c2410-rtc s3c2410-rtc: setting system clock to 2007-10-30 02:00:47 UTC (1193709647)eth0: link downIP-Config: Complete:     device=eth0, addr=192.168.1.102, mask=255.255.255.0, gw=255.255.255.255,     host=192.168.1.102, domain=, nis-domain=(none),     bootserver=192.168.1.1, rootserver=192.168.1.103, rootpath=Looking up port of RPC 100003/2 on 192.168.1.103eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1Looking up port of RPC 100005/1 on 192.168.1.103VFS: Mounted root (nfs filesystem) on device 0:11.Freeing init memory: 156KProcessing /etc/profile... Done# # # lsbin      etc      linuxrc  proc     sys      usrdev      lib      mnt      sbin     tmp      var# cd sys/devices/platform/# lsdm9000             s3c2410-rtc        s3c2440-sdi        s3c2440-usbgadgets3c2410-iis        s3c2410-wdt        s3c2440-uart.0     s3c24xx_uda134x.0s3c2410-lcd        s3c2440-i2c        s3c2440-uart.1     soc-audios3c2410-ohci       s3c2440-nand       s3c2440-uart.2     uevent# 

任务完成

待续。。。。