涉及u-boot工程的总体结构，u-boot的流程、主要的数据结构、内存分配，U-boot在ST2410的移植，基于NOR FLASH和NAND FLASH启动。-Involving u- the overall structure of the boot project, u- the boot process, the main data structures, memory allocation, u- the boot in ST2410 transplantation, on the