Transplantation of U-Boot on NAND Flash Based on S3C2440 Processor

摘要

The main task of bootloader is to copy the kernel image to RAM, and then jump to the entrance of the kernel to run the operating system. It is the first-running code when the system is powered on. U-boot, with its open-source codes, supporting for varieties of embedded operating system kernel, high reliability and stability, has been in the mainstream of bootloader. However, it has not yet provided the original support for the S3C2440 processor, neither does its NAND flash. This paper analyzes two flashes in reference to the corresponding start-up mode, and introduces the U-boot start-up procedures briefly and figures out the major steps of transplanting U-boot to the target platform. U-boot was transplanted successfully.