On Fri, Dec 04, 2009 at 11:52:03AM -0600, Ed Okerson wrote:
> Is it possible to mmap an address in KSEG1 so a user space app can
> read/write to an IO device uncached?
well not exactly to KSEG1, since that is kernel exclusive address space,
but it's possible to map the physical address of the device:
Try
fd = open("/dev/mem", O_RDWR|O_SYNC);
io = mmap (NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, ioaddr);
where ioaddr is the physical address of the io device.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessary a
good idea. [ RFC1925, 2.3 ]
