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== NOR Boot ==
NOR flash boot sequence is easier and faster than NAND boot, mainly because X-Loader is not needed. When AM35xx comes out from reset, Boot ROM is executed in this mode to perform some basic initialization. After that, the CPU jumps at the beginning of GPMC CS0, where NOR flash reside, and U-Boot is started.
== NAND Boot ==
X-Loader is the 2nd stage loader loaded by AM35xx Boot ROM to start 3rd stage tool like U-Boot when the NAND memory is configured as the boot flash. The Boot ROM code is always executed when the AM35xx comes out from reset and, after the first initialization step, it loads the X-Loader from storage memories (or from peripherals, like for example the serial port). X-Loader then retrieves U-Boot from flash memory (or from peripherals), which is in charge of launching the operating system.
