移植u-boot-2010.03 --- 使用tftp下载并运行内核

在解决了u-boot网卡驱动后，其实就可以通过tftp下载内核，并运行内核

1，查看系统参数

WU_SMDK6410 # printenvbootargs=console=ttySAC,115200bootcmd=nand read 0x50008000 0x100000 0x500000;bootm 0x50008000bootdelay=10baudrate=115200ethaddr=00:40:5c:26:0a:5bipaddr=192.168.1.123serverip=192.168.1.127gatewayip=192.168.1.1netmask=255.255.255.0stdin=serialstdout=serialstderr=serialethact=dm9000

检查地址，保证能连通主机的tftp,前文有提到过，这里不再说明方法。

2，下载内核

保证主机上的tftp服务器已经正常启动。并且在tftp根目录下有编译好的uImage镜像文件

WU_SMDK6410 # tftp uImagedm9000 i/o: 0x18800300, id: 0x90000a46 DM9000: running in 16 bit modeMAC: 00:40:5c:26:0a:5boperating at 100M full duplex modeUsing dm9000 deviceTFTP from server 192.168.1.127; our IP address is 192.168.1.123Filename 'uImage'.Load address: 0x50000000Loading: T T #################################################################         ###########################################doneBytes transferred = 1575472 (180a30 hex)

3，运行内核

WU_SMDK6410 # bootm## Booting kernel from Legacy Image at 50000000 ...   Image Name:   Linux-3.12.7   Image Type:   ARM Linux Kernel Image (uncompressed)   Data Size:    1575408 Bytes =  1.5 MB   Load Address: 50008000   Entry Point:  50008000   Verifying Checksum ... OK   Loading Kernel Image ... OKOKStarting kernel ...Uncompressing Linux... done, booting the kernel.Booting Linux on physical CPU 0x0Linux version 3.12.7 (wu@wu-VirtualBox) (gcc version 4.4.3 (ctng-1.6.1) ) #1 Tue Jan 21 17:10:55 CST 2014CPU: ARMv6-compatible processor [410fb766] revision 6 (ARMv7), cr=00c5387dCPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cacheMachine: OK6410Memory policy: ECC disabled, Data cache writebackCPU S3C6410 (id 0x36410101) .......省略.......