Bootloader study and implementation of embedded system based on PXA270

In the embedded system development,it is very important to guild the development board correctly in the embedded software development.The realization of Bootloader is quite dependent on hardware and it is impossible to establish a common Bootloader.In close connection with the main hardware composing of embedded system based on PXA270,the startup process and the memory map of Bootloader are mainly studied.Finally,according to the basic hardware design of embedded system,u-boot-1.1.4 is taken for example to discuss the method and point of Bootloader porting,and the guide of embedded development board is eventually realized.