imx28 alternating debug logging

[shashikanthirem]

in imx28, is there any way of logging bootloader and kernel messages instead of debug console port serial cable to sd card or any pc media,

we have a strange issue, where no debug port is populated on imx28 unit, but unit is getting freeze in couple of hours, after power cycle also still unit is freeze, but we need to observe a log, whether unit stuck at bootloader or kernel, with out debug console populated, 

I would like  to know, is there any alternate way to logging mechanism this scenario, we have sd card and ethernet populated.

[b36401]

If you connect the board with something like telnet or ssh over the network you can see kernel messages inside the Linux with dmesg command.

[shashikanthirem]

This is applicable when the bootloader, kernel running, but how do we check 

a, bootloader freeze

b. kernel freeze.