[U-Boot] how compilor know where .text section starts from?

Hi, everybody: I am new to uboot and reading source code, I have a question: how does compilor know where .text section starts from? For example, I am using MPC8548CDS, document says .text section begins from 0xfff8000, but I haven't find this value in u-boot.lds? So it must be specified in some other place, right?