440GX: mapping PCI address

Barbier, Renaud (GE Infrastructure) Renaud.Barbier at ge.com
Fri Jul 23 00:43:26 EST 2004

> /*
> * 36-bit trap ranges
> */
> #define PPC44x_IO_LO            0x40000000
> #define PPC44x_IO_HI            0x40001000
> #define PPC44x_PCICFG_LO        0x0ec00000
> #define PPC44x_PCICFG_HI        0x0ec7ffff
> #define PPC44x_PCIMEM_LO        0x80002000
> #define PPC44x_PCIMEM_HI        0xffffffff

> Hope this helps,
>  Gerhard

Indeed, I get a virtual address out of mmap
but my system freezes when I access it.
I try to access the PCI external configuration registers:

ptr=(unsigned int *)mmap(0, getpagesize(), PROT_READ | PROT_WRITE,
                             MAP_SHARED, fd, 0x0ec00000);

My kernel is 2.4.21 I would guess it should work from what I have seen regarding
messages about 36-bit address on 440GX.

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

More information about the Linuxppc-embedded mailing list