Builds linux kernels with yaffs. produces a root filesystem with yaffs format.downloads the kernels and root filesystem to the NAND flash via bootloader(vivi),then boots the linux knerl from NAND flash.

• 然后制作YAFFS格式的根文件系统,通过Bootloader下载内核和根文件系统到NAND Flash,让内核从NAND Flash启动。