TQ2440 + uboot1.1.6
1. uboot修改
1.1common/main.c

1. 在函數(shù) main_loop大約513行:
   

2. char cmd_buf[200];
   

3. printf("Booting Linux ...n");
   

4. //boot_zImage(0x200000,0x200000);//注釋boot_zImage
   

5. strcpy(cmd_buf,"tftp 0x30008000 zImage; boot_zImage");//tftp內(nèi)核到內(nèi)存的0x30008000,然后啟動(dòng)zImage;
   

6. run_command(cmd_buf,0);//這兒只不過(guò)是由以前的從nandflash取數(shù)據(jù)改變?yōu)閺膎and flash取數(shù)據(jù)

1.2 lib_arm/boot_zImage.c

1. 151intboot_zImage(ulong from,size_t size)
   

2. 152{
   

3. 162 /*printk("Copy linux kernel from 0x%08lx to 0x%08lx, size = 0x%08lx ... ",from,to,size);//注掉從nand_flash中拷kernel部分,當(dāng)然這兒也可以自己添加新的命令
   

4. 163 ret=copy_kernel_img(to,(char*)from,size);
   

5. 164 if(ret){
   

6. 165 printk("failedn");
   

7. 166 return-1;
   

8. 167}else{
   

9. 168 printk("Copy Kernel to SDRAM done,");
   

10. 169 }*/
    

11. 177}

a.root@ubuntu:~#apt-getinstall tftpd tftp openbsd-inetd;安裝

1. b.root@ubuntu:~#vi im/etc/inetd.conf;配置tftp文件路徑
   

2. tftp dgram udp wait nobody/usr/sbin/tcpd/usr/sbin/in.tftpd/tmp
   

3. c.root@ubuntu:~#chmod 777/tmp
   

4. d.root@ubuntu:~#/etc/init.d/openbsd-inetd restart;重啟服務(wù)，使配置生效
   

5. root@ubuntu:~#netstat-an|grep 69;查看69端口是否打開(kāi)
   

6. root@ubuntu:~#tftp 192.168.1.2;tftp 本機(jī)ip測(cè)試一下
   

7. tftp>gettest.txt
   

8. 注意：/root不可以作為tftp根目錄,設(shè)置tftproot為:/tmp

3. 修改內(nèi)核Makefile

1. arch/arm/boot/Makefile中
   

2. 56 $(obj)/zImage:$(obj)/compressed/vmlinux FORCE
   

3. 57 $(callif_changed,objcopy)
   

4. 58 cp-arf arch/arm/boot/zImage/tmp/zImage　
   

5. 59 @echo'Kernel:$@isready

將新生成的zImage拷貝到 /tmp中