Messages in this thread | | | Date | Sat, 5 Aug 2000 01:37:54 +0200 | Subject | Re: PCI Memory Mapping | From | Andreas Bombe <> |
| |
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.
-- Andreas E. Bombe <andreas.bombe@munich.netsurf.de> DSA key 0x04880A44 http://home.pages.de/~andreas.bombe/ http://linux1394.sourceforge.net/
- 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/
| |