svn commit: r309531 - head/sys/arm/include

[John Baldwin]

On Sunday, December 04, 2016 03:27:39 PM Michal Meloun wrote:
> Author: mmel
> Date: Sun Dec  4 15:27:39 2016
> New Revision: 309531
> URL: https://svnweb.freebsd.org/changeset/base/309531
> 
> Log:
>   Implement fake pmap_mapdev_attr() for ARMv6.
>   This function is referenced, but never called from DRM2 code. Also,
>   real behavior of pmap_mapdev_attr() in ARM world is unclear as we don't
>   have any additional attribute for a device memory type.

You have VM_MEMATTR constants on ARM though.  Some devices might want a
WB mapping (e.g. for a prefetchable memory BAR) rather than UC.

-- 
John Baldwin