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SubjectRe: PCI Memory Mapping


On Sat, 5 Aug 2000, Andreas Bombe wrote:

> On Fri, Aug 04, 2000 at 01:56:39PM -0700, Charles Samuels wrote:
> > Anyway, What I'm doing is scanning the PCI bus, and finding the one
> > or more cards that have 16mb of on-board memory. base_address[0] if you
> > will. I AND that with PCI_BASE_ADDRESS_IO_MASK, and register a device
> > major and minor for the device.
> >
> > A userland program will now attempt to mmap the device. It requests
> > exactly 16mb. Everything seems ok until I try to read or write to this
> > memory. It gives me a kernel complaint:
> >
> > do_wp_page: bogus page at address 4017400 (72000000)
> [...]
> > if (remap_page_range(vma->vm_start, physical, vsize, vma->vm_page_prot))
> > return 0;
>
> Use io_remap_page_range() instead.
This function is undefined. I think it's a sparc specific (or at least a
non-intel) function. (btw, I'm on 2.2.15)

>
> --
> Andreas E. Bombe <andreas.bombe@munich.netsurf.de> DSA key 0x04880A44
> http://home.pages.de/~andreas.bombe/ http://linux1394.sourceforge.net/
>


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