说明：  嵌入式系统一般没有通用的bootloader，u-boot是功能强大的bootloader开发软件，但相对也比较复杂。文中对u-boot的启动流程作了介绍，详细给出了u-boot在S3C44B0开发板上的移植方法和步骤。
(Embedded systems in general there is no universal bootloader, u-boot is a powerful bootloader software development, but also relatively more complicated. In this paper, u-boot startup process was introduced in detail gives the u-boot in the development of on-board S3C44B0 transplant methods and steps.)