本人使用开发板是三星的s3c2410实验开发箱(应该很通用的吧！)，主机系统linux ubuntu9.04，bootloader使用vivi，内核选用linux－2.6.14， 文件系统是 busybox1.5.1，在装入cs8900(目标板网卡)驱动后使用NFS进行挂载。
       挂载目录是:/arm2410/root（成功挂载到本机任何一个目录）。本主机IP192.168.1.124,目标板IP192.168.1.20。一下是内核启动变量：root=/dev/nfs nfsroot=192.168.1.124:/arm2410/root ip=192.168.1.20:192.168.1.1:192.168.1.1:255.255.255.0:matrix4.arm9.net:eth0:off init=linuxrc console=ttySAC0,115200
       但最后仍不能辨认出目标板，请大家给点宝贵意见 ，
下面是部分信息：
Uncompressing Linux.............................................................
Linux version 2.6.14 (root@will-desktop) (gcc version 3.4.1) #10 Tue Jun 23 17:9
CPU: ARM920Tid(wb) [41129200] revision 0 (ARMv4T)                               
Machine: SMDK2410                                                               
ATAG_INITRD is deprecated; please update your bootloader.                       
Memory policy: ECC disabled, Data cache writeback                               
CPU S3C2410A (id 0x32410002)                                                    
S3C2410: core 200.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz            
S3C2410 Clocks, (c) 2004 Simtec Electronics                                     
CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on                            
CPU0: D VIVT write-back cache                                                   
CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets             
CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets             
Built 1 zonelists                                                               
Kernel command line: root=/dev/nfs nfsroot=192.168.1.124:/arm2410/root ip=192.10
irq: clearing subpending status 00000002                                        
PID hash table entries: 512 (order: 9, 8192 bytes)                              
timer tcon=00000000, tcnt a2c1, tcfg 00000200,00000000, usec 00001eb8           
Console: colour dummy device 80x30                                              
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)                  
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)                    
Memory: 64MB = 64MB total                                                       
Memory: 61952KB available (2154K code, 553K data, 100K init)                    
Mount-cache hash table entries: 512                                             
CPU: Testing write buffer coherency: ok                                         
softlockup thread 0 started up.                                                 
NET: Registered protocol family 16                                              
S3C2410: Initialising architecture                                              
SCSI subsystem initialized                                                      
usbcore: registered new driver usbfs                                            
usbcore: registered new driver hub                                              
S3C2410 DMA Driver, (c) 2003-2004 Simtec Electronics                            
DMA channel 0 at c4800000, irq 33                                               
DMA channel 1 at c4800040, irq 34                                               
DMA channel 2 at c4800080, irq 35                                               
DMA channel 3 at c48000c0, irq 36                                               
NetWinder Floating Point Emulator V0.97 (double precision)                      
devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au)                          
devfs: boot_options: 0x1                                                        
NTFS driver 2.1.24 [Flags: R/W].                                                
s3c2410-lcd s3c2410-lcd: no platform data for lcd, cannot attach                
s3c2410-lcd: probe of s3c2410-lcd failed with error -22                         
Console: switching to colour frame buffer device 80x25                          
fb0: Virtual frame buffer device, using 1024K of video memory                   
S3C2410 RTC, (c) 2004 Simtec Electronics                                        
s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410                      
s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410                      
s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410                      
io scheduler noop registered                                                    
io scheduler anticipatory registered                                            
io scheduler deadline registered                                                
io scheduler cfq registered                                                     
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize           
usbcore: registered new driver ub                                               
Cirrus Logic CS8900A driver for Linux (Modified for SMDK2410)                   
eth0: CS8900A rev E at 0xe0000300 irq=53, no eeprom , addr: 08: 0:3E:26:0A:5B   
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2                        
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx     
S3C24XX NAND Driver, (c) 2004 Simtec Electronics                                
usbmon: debugfs is not available                                                
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                                                   
Initializing USB Mass Storage driver...                                         
usbcore: registered new driver usb-storage                                      
USB Mass Storage support registered.                                            
usbcore: registered new driver usbkbd                                           
drivers/usb/input/usbkbd.c: :USB HID Boot Protocol keyboard driver              
usbcore: registered new driver usbmouse                                         
drivers/usb/input/usbmouse.c: v1.6:USB HID Boot Protocol mouse driver           
mice: PS/2 mouse device common for all mice                                     
NET: Registered protocol family 2                                               
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)                  
TCP established hash table entries: 4096 (order: 2, 16384 bytes)                
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)                       
TCP: Hash tables configured (established 4096 bind 4096)                        
TCP reno registered                                                             
TCP bic registered                                                              
NET: Registered protocol family 1                                               
IP-Config: Complete:                                                            
      device=eth0, addr=192.168.1.20, mask=255.255.255.0, gw=192.168.1.1,       
     host=matrix4, domain=, nis-domain=arm9.net,                                
     bootserver=192.168.1.1, rootserver=192.168.1.124, rootpath=                
Looking up port of RPC 100003/2 on 192.168.1.124  
NETDEV WATCHDOG: eth0: transmit timed out                                       
NETDEV WATCHDOG: eth0: transmit timed out                                       
NETDEV WATCHDOG: eth0: transmit timed out                                       
NETDEV WATCHDOG: eth0: transmit timed out                                       
NETDEV WATCHDOG: eth0: transmit timed out                                       
NETDEV WATCHDOG: eth0: transmit timed out     

楼主貌似我们做实验也是需要用nfs作为板子的linux的file system，貌似因为板子没有硬盘的缘故，我想问一下你到底是在哪一步出了问题？
我们做实验的步骤：
    1.在windows下面将bootloader 烧入板子的flash，这一步是使用jtag调试和串口作为数据传输
   2.切入linux下（我们是fedora）首先配置nfs文件，主要是主机和板子的ip（具体忘记了，不过我有实验书，可以发给你），然后启动cutecom---类似于windows下面的超级终端，作为数据传输，或者说加载linux的映像，当目标板的linux启动（有小企鹅），确保你的linux网络处于激活状态，因为cutecom中向板子发送命令行命令（如ls，cd等）靠的是网络接口。
   貌似我们也是使用你用的那款箱子，希望以上对楼主有帮助。
   如果想要一些关于这方面的资料，我可以提供一些（主要是实验指导手册）
   email：Tristan_xiao@qq.com