[U-Boot-Users] memory probe

Hi,

We are planning to use uboot on our system and wanted to know if u-boot can probe the memory installed on the system automatically and pass the correct mem size to linux kernel ?

Way I could understand it was that the mem size and offset had to be compile time #define'ed ..

what if we want same image to work on 2 different memory configuration hardware ?

how does the memory probe work on PC etc ? bootloaders use BIOS Calls ? how can I do this on my ixdp425 plattform ?

Cheers, Sumit