内核移植首次生成uImage映象文件,挂载NFS文件系统

1、make uImage ARCH=arm CROSS_COMPILE=arm-linux- ，首次编译完内核用了4分钟，尾部出现如下信息：

   LD      arch/arm/boot/compressed/vmlinux
  OBJCOPY arch/arm/boot/zImage
  Kernel: arch/arm/boot/zImage is ready
  UIMAGE  arch/arm/boot/uImage
"mkimage" command not found - U-Boot images will not be built
  Image arch/arm/boot/uImage is ready

2、从上面可以看出没有出现内核信息，于是从新回到pc机上编译内核完成的地方来查看问题出在哪？

看到这一行："mkimage" command not found - U-Boot images will not be built

                    可以看出缺少mkimage这个命令。

3、上网查了点资料，在编译完成的u-boot-1.1.6的tool/下面找到mkimage这个文件，

把它烤贝到交叉编译的路径下面/usr/local/arm/4.4.3/bin

4、重新再进入顶层，再进行内核编译，make uImage ARCH=arm CROSS_COMPILE=arm-linux-,这次成功产生如下信息：

OBJCOPY arch/arm/boot/Image
  Kernel: arch/arm/boot/Image is ready
  AS      arch/arm/boot/compressed/head.o
  GZIP    arch/arm/boot/compressed/piggy.gz
  AS      arch/arm/boot/compressed/piggy.o
  CC      arch/arm/boot/compressed/misc.o
  LD      arch/arm/boot/compressed/vmlinux
  OBJCOPY arch/arm/boot/zImage
  Kernel: arch/arm/boot/zImage is ready
  UIMAGE  arch/arm/boot/uImage
Image Name:   Linux-2.6.22.6
Created:      Sun Dec  6 22:33:55 2009
Image Type:   ARM Linux Kernel Image (uncompressed)
Data Size:    1511064 Bytes = 1475.65 kB = 1.44 MB
5、cp arch/arm/boot/uImage /tftpboot

6、u-boot环境下设置环境变量：

     mini2440#:setenv bootargs noinitrd root=/dev/nfs rw      nfsroot=192.168.1.125:/home/liuweiwen/rootfs ip=192.168.1.100:192.168.1.120::255.255.255.0     console=ttySAC0,115200 init=/linuxrc mem=64M
    mini2440#:saveenv
7、tftp 31000000 uImage
8、bootm 31000000
Uncompressing Linux...................................................................................................................................................... done, booting the kernel.

Linux version 2.6.32.2-FriendlyARM ([e-mail]) (gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72) ) #3 Wed Feb 12 07:24:07 CST 2014

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

CPU: VIVT data cache, VIVT instruction cache

Machine: FriendlyARM Mini2440 development board

Memory policy: ECC disabled, Data cache writeback
......................................................................................
 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

Looking up port of RPC 100005/1 on 192.168.1.125

VFS: Mounted root (nfs filesystem) on device 0:11.

Freeing init memory: 160K

Processing /etc/profile... Done

# ls

bin      etc      lib      mnt      sbin     tmp      var

dev      init     linuxrc  proc     sys      usr