As you could see by 'grep enter_wired sys/dev/arc/*/*.c',
arc port uses wired mappings with various pagesize
to map device spaces as the firmware does, i.e.
wired map on arc is used to provide access method for
some devices (especially console) before uvm is initialized.

Other usage of wired map is only in arc/bus_space_large.c
to avoid a waste of TLB on mapping large memory space
(like framebuffer VRAM).

Do you have any good idea to handle these ops in your MI
wired map functions?
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Izumi Tsutsui