Hello All, I have a board MPC 8540 ported with ppc Linux and U-boot. U-boot is going to intialize the memory map, like mapping 0x00000000 to SDRAM interface and 0xe0000000 to pci interface. so when we write at 0xe0000000 , the data will go through the pci. Assuming that whatever the memory map done by U-boot is carried over to the Linux, I wrote virtual_address = __va(0xfdf00000) to get the virtual address for CCSRBAR , which contains fdf00000 at offset zero.(It contains it's address at the offset zero from the CCSRBAR). If I dereference the virtual_address( *virtual_address = fdf00000) it should contain the same address. But when i tried this , it result in segmentation fault. pls give me any clue. Above all, what I want is , the memory map is carried from the u-boot to linux, if so how to get the virtual address(to manipulate in the kernel module) for the physical address to manipulate the processor registers. Thanks in Advance Regards Jhoney
