I changed the _IO_BASE from 0x80000000 to 0xF0000000. I also set the PBR1 of PCMCIA to 0xF0000000 and the IO space is 0x00~0x3f. When I use the inw(x) to read or outw(x,y) to write the IO registers, it always return "Segmentation fault". I guess my IO port address is not correct. Should I set the MMU to make the 0xF0000000 to be the IO_PAGE? Thanks,
Leiying ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/