I grepped all the linux tree for "HAVE_ARCH_FB_UNMAPPED_AREA".
arch/sparc/include/asm/pgtable_64.h:#define HAVE_ARCH_FB_UNMAPPED_AREA
arch/blackfin/include/asm/pgtable.h:#define HAVE_ARCH_FB_UNMAPPED_AREA
drivers/video/fbmem.c:#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
Seems that for my case (m68k-nommu) it is not defined, so none of the
get_unmapped_area will be called, in any place.
Bu in fbmem.c there is a "fb_mmap" that's probably called.
I will try to set correctly as you said fix.smem_start and .smem_len
and let you know.
Thanks
Angelo
On 12/12/2012 23:21, Gavin Lambert wrote:
> Quoth angelo:
>> thanks, well, i implemented the handler:
>>
>> static int amcorefb_mmap(struct fb_info *info, struct vm_area_struct
>> *vma) {
>
> No, that's not the right one. You don't need to implement that.
>
>> Seems i miss the "get_unmapped_area/BDI_CAP_MAP_DIRECT) capability.
>
> fbmem.c implements the main get_unmapped_area handler. In your framebuffer
> driver you just need to either implement fb_get_unmapped_area or (easier,
> but only works on nommu) set fix.smem_start and .smem_len correctly in your
> fb_info.
>
>
> _______________________________________________
> uClinux-dev mailing list
> uClinux-dev@uclinux.org
> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> This message was resent by uclinux-dev@uclinux.org
> To unsubscribe see:
> http://mailman.uclinux.org/mailman/options/uclinux-dev
--
_______________________________________________
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
