固化u-boot，kernel到flash上，让uboot开机帮您引导内核

固化
       
如果你想把镜像文件写入flash，每次开机后让u-boot帮你复制到sdram中，再使用bootm命令引导的话，可以按照这样操作：
sbc2410=>tftp 0x30008000 zImage.img
TFTP from server 192.168.1.115; our IP address is 192.168.1.128
Filename 'zImage.img'.
Load address: 0x30008000
Loading: #################################################################
        #################################################################
        #################################################################
        ####################################################
done
Bytes transferred = 1263324 (1346dc hex)
sbc2410=>nand erase 0x30000 0x1d0000

NAND erase: device 0 offset 196608, size 1900544 ... OK
sbc2410=>nand write 0x30008000 0x30000 0x1d0000

NAND write: device 0 offset 196608, size 1900544 ...  1900544 bytes written: OK

设置u-boot启动命令：
1、针对方法一：
sbc2410=>setenv bootcmd nand read 0x31000000 0x30000 0x1d0000/;bootm 0x31000000
sbc2410=>saveenv
Saving Environment to NAND...
Erasing Nand...Writing to Nand... done
2、针对方法二：
sbc2410=>setenv bootcmd nand read 0x30008000 0x30000 0x1d0000/;bootm 0x30008000
sbc2410=>saveenv
Saving Environment to NAND...
Erasing Nand...Writing to Nand... done

sbc2410=>reset
启动信息略。。。。