riastradh a2eca9ebfa Make Linux io_mapping actually work.
Can't use bus_space_map/bus_space_unmap in interrupt context, where
Linux uses this io_mapping abstraction.  Instead, do uvm_km_alloc up
front and then use bus_space_mmap/pmap_kenter_pa to map it.

XXX Should bus_space_reserve the region (but that's x86-only for now).
XXX Should use direct map if possible.
XXX Should set an MTRR WC too in case of direct map or no PAT.
2014-08-28 13:45:59 +00:00
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2014-08-23 02:20:55 +00:00
2014-08-24 20:30:49 +00:00
2014-08-27 13:56:02 +00:00
2014-08-27 04:07:04 +00:00
2014-08-25 13:22:20 +00:00
2014-08-28 13:45:59 +00:00
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