Kernel hangs on bootup on a mips based board

[Aney]

Hi all
        I am working on a mips based broadcom system.I have cross-compiled the Linux 2.6.25 vanilla kernel for the mips architecture and downloaded the image onto the board.On bootup the kernel just simply hangs,without giving any information.Could anyone please tell me as what might cause the kernel to hang like this?I have enabled 'early_printk' and broadcom serial driver in 'make menuconfig'.I personally feel that the control is not entering into start_kernel() present in init/main.c file.Is there any way to figure out whether control comes into 'start_kernel()' or not?

Thanks and Regards
Ananth