[U-Boot] address of boot_params and kernel entry point

Hi

Why does most of the existing configurations use such addresses as:

For passing boot_params gd->bd->bi_boot_params = PHYS_SDRAM + 0x100; Why + 0x100 and not just PHYS_SDRAM?

Similarly for Linux kernel load address PHYS_SDRAM + 0x8000 Why + 0x8000?

I think by doing this the following areas are unused, please correct me if I am wrong. PHYS_SDRAM to PHYS_SDRAM+0x100 PHYS_SDRAM+0x100+boot_param_len to PHYS_SDRAM+0x8000

Just want to make sure if I am missing something.

Best regards Iram