Abramo Bagnara wrote:
> Alan Cox wrote:
> > > Does this means that there is no way to mmap the PCI IO space on any
> > > platform other than ia32?
> > PCI mmap to user space can be done (obvious coherency and other issues left
> > to the user mode sufferer) but that isnt done by ioremap
> I suppose you mean I need to use remap_page_range with the address
> obtained from ioremap, don't you?
io_remap_page_range not remap_page_range. grep for it in the 2.4.x tree
to see example usage.
> But, that apart, is a device driver that give available a part of the
> PCI IO space of controlled card via mmap portable to all platforms that
> have PCI?
Assuming you have PCI shared memory space (MMIO) and not real PCI IO
space (PIO), and assuming you use io_remap_page_range, yes.
> And if this is true, the user application that use this mmaped area may
> be written in a platform independant way?
Your userland application must still get byteswapping and such correct.
Jeff
-- Jeff Garzik | Building 1024 | Yossarian lives. MandrakeSoft, Inc. |- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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