[U-Boot-Users] Passing board info from uboot to linux

hi,

1- when linux image is zImage, there is no boot parameter passing from bootloader(DINK32 or customer firmware) to kernel and bootloader integrated into linux image. In this situation, is linux kernel start at point linux/arch/ppc/kernel/haed.S - _start start up code ?

2- when linux image is uImage, how do u-boot pass board info data structure to linux kernel? where is linux kernel starting point in linux sources?

Best Regards, Mustafa