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On Fri, Oct 15, 2004 at 11:46:42PM -0400, Glenn Burkhardt wrote: > I'm writing an application to run on a PowerPC with a 2.4 embedded > Linux kernel, and I want to make device registers for our custom > hardware accessable from user space with mmap(). The physical address > of the device is above the 4gb boundary (we attach to the 440's > external peripheral bus), so a standard 'remap_page_range()' call > won't work. <snip> This has come up several times on the ppc lists (but since we still don't have archives back, nobody can search anyway). I dropped 2.4 and 2.5 patches in source.mvista.com:/pub/linuxppc/ a long time ago. You just need to update your board-specific fixup routine in that version or just make a copy or remap_page_range() into your driver and use u64 for the phys address. The real fix, of course, is in the -mm tree as remap_pfn_range(), I plan to merge 440 io_remap_page_range() support on top of that call when it goes into mainline. But that doesn't help you with 2.4. :) -Matt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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