[lkml]   [2008]   [Mar]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24)
    On Sat, 22 Mar 2008, Linus Torvalds wrote:
    > On Sat, 22 Mar 2008, Stefan Richter wrote:
    > >
    > > Can an MMIO region reside above 0x1'0000'0000 on x86-32? ... Apparently yes,
    > > if CONFIG_RESOURCES_64BIT=y.
    > Hmm. It would only work if PAE (HIGHMEM64G) is enabled too.
    > And obviously the hardware has to have working 64-bit BAR's.
    > AND no, I don't think our x86-32 ioremap() actually works for this case,
    > because while the resource data may have the full 64 bits, when the
    > ioremap() happens it gets truncated to 32 bits.
    > Ingo/Thomas - should ioremap*() perhaps take "resource_size_t" or a "u64"
    > for the address (and then "__ioremap()" should probably take a PFN, not a
    > physical address, and that one can remain just a "unsigned long"?)

    Hmm. No idea. I look into that on monday (tomorrow is family
    day). Right now I'm too tired to provide any useful input.

    > Has anybody ever had a working 64-bit BAR on x86? Ivan? Maybe I'm missing
    > something..

    Same here.



     \ /
      Last update: 2008-03-22 23:03    [W:0.021 / U:134.236 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site