AM335x U-Boot User's Guide.pdf下载

In AM335x the ROM code serves as the bootstrap loader, sometimes referred to as the Initial Program Loader (IPL)or the Primary Program Loader (PPL). The booting is completed in two consecutive stages by U-Bootbinaries.The binary for the 1st U-Boot stage is referred to as the Secondary Program Loader (SPL) or the MLO. The binaryfor the 2nd U-Boot stage is simply referred to as U-Boot.SPL is a non-interactive loader and is a specially builtversion of U-Boot. It is built concurrently when building U-Boot.