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    SubjectRe: [PATCH 2.6.19-rc1 full] drivers: add LCD support
    Miguel Ojeda wrote:
    > Sorry, I meant: You can't mmap a RAM address using functions like the
    > usual remap_pfn_range (as such functions doesn't like physical RAM
    > addresses, they want I/O ports for example, like 0x378). So, you can't
    > use smem_start. You need to code your own mmap & nopage function. (It
    > is explained in LDD3 very well).

    well I must admit that I don't understand why... I suppose you refered
    to that section in ldd3:

    An interesting limitation of remap_pfn_range is that it gives
    access only to reserved pages and physical addresses above the
    top of physical memory.

    I take a quick look at the implementation of remap_pfn_range() and
    there's no such limitation I can see (fortunately).

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      Last update: 2006-10-30 09:45    [W:0.025 / U:8.768 seconds]
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