u-boot的启动流程分析及移植步骤

介绍了嵌入式系统中的一个开发源码的软件u—boot。u—boot的实现依赖于CPU体系结构的代码，分为stage1和stage2两部分，分别用汇编语言和C语言实现。详细介绍了u—boot在S3C44B0开发上的移植步骤，包括交叉编译环境的建立、移植前的预编译等。实例证明该软件功能强大．适用范围广。

Start sequence and porting steps of u-boot

U,boot,a software developing source code in the embedded system,is introduced. The realization of u,boot depends on the structure code of CPU. It consists of stage 1 and stage 2,which are developed with the assemble language and the C language respectively. The porting steps of u,boot on S3C44B0 board are expounded,including the construction of across compiling envi,ronment and the pre , compiling before porting. The example proves its powerful functions and wide applications.