ronen no wrote:
Hello,
we are in the process of initializing the SDRAM refresh procedure with MPC8260. As we get started, we have seen that u-boot.1.1.1 code includes two functions which includes: board/mpc8260ads/mpc8260ads.c initdram() cpu/cpu.c upmconfig()
we have seen that initdram() is called from init_func_ram() in board/lib_ppc/board.c Also, init_func_ram() is a function pointer in the array init_sequence[].
we have not seen that the function upmconfig() is ever called for MPC8260ads, and we would like to know whether we should call it.
Currently, we have the u-boot1.1.1 reaching the relocate_code to the point where the kernel image is copied from Flash to SDRAM, but the image in the SDRAM is corrupted.
The question is: is there a bug in the mpc8260ads that does not call the upmconfig() or we should not call it at all?
Looking forward for your input.
Regards, Ronen
The SDRAM is controlled by the SDRAM machine which is initialized by initdram(). The UPM machine is not used to control the SDRAM (at least in any 82xx system I'm aware of), so not calling upmconfig() is not an error unless your board uses the upm for something (sounds like not).
You probably have a problem in your SDRAM initialization: this is a tough area to set up correctly because it depends on your SDRAM and other hardware. Make sure your initialization matches the manufacturer's recommended initialization.
FAQ: http://www.denx.de/wiki/view/DULG/UBootCrashAfterRelocation
gvb