在移植u-boot时所用到的命令操作，补丁文件的制作方法

/* u-boot 对nand的支持及整个流程的分析 */

nand_init
 nand_init_chip
  board_nand_init
   nand->cmd_ctrl = s3c2440_hwcontrol;
  nand_scan
   nand_scan_ident
    nand_set_defaults
     chip->select_chip = nand_select_chip;
    nand_get_flash_type
     chip->select_chip(mtd, 0);
     chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
     chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
     *maf_id = chip->read_byte(mtd);
     *dev_id = chip->read_byte(mtd);
  nand_register(i) 
  
  
  
void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column,int page_addr);  
chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);

 

/* u-boot的基本参数设置 */

set ipaddr 192.168.2.2
set ethaddr 00:0c:29:2d:59:7d
set serverip 192.168.2.1

 

/* 通过tftp将u-boot写入nor flash */
tftp 30000000 u-boot_new.bin
protect off all
erase 0 3ffff
cp.b 30000000 0 40000

tftp 30000000 fs_mini_mdev.jffs2
nand erase.part rootfs
nand write 30000000 0x00260000 5b89a8

set bootargs console=ttySAC0 root=/dev/mtdblock3 rootfstype=jffs2

 

/* 移植内核 */
tftp 30000000 uImage_3.5
nand erase.part kernel
nand write 30000000 0x00060000 1c3590

 

 

/* 移植文件系统 */

set bootargs console=ttySAC0 root=/dev/mtdblock3 rootfstype=yaffs2

tftp 30000000 fs_mini_mdev.yaffs2
nand erase.part rootfs
nand write.yaffs 30000000 0x00260000 889bc0

tftp 30000000 u-boot.bin
protect off all; erase 0 3ffff; cp.b 30000000 0 40000

 

 

/* 在完成了对u-boot的修改后，生成补丁文件，记录下修改过的内容。 */

 

make distclean           //清除生成的所有文件
rm u-boot.dis            

cd ..
mv u-boot-2012.04.01 u-boot-2012.04.01_new  //重新命名
tar -xjf u-boot-2012.04.01.tar.bz2                       //创建原文件
diff -urN u-boot-2012.04.01 u-boot-2012.04.01_new > u-boot-2012.04.01_new.patch  //生成补丁