In my board with PPC we have a DDR SDRAM of 128 MB which is memory mapped from 0x00000000 (physical address).
I am writing a memory driver and wants to insert it as a loadable module.
I am able to do ioremap(0x00000000, sizeof(x))
but when i do insmod i am getting a warning message stating

__ioremap(): phys addr 00000000 is RAM lr d102a044

Please help me on this.