(object, function, offset, target). An access not targeting any object in the map attribute will be forwarded to the default target. target should be non-nil if and only if object is a translation object.
((base, object, function, offset, length)*). Maps zero or more object to the port space. object, which must implement the io-memory interface, is mapped from base to base + length − 1 (inclusive). Both function and offset is handed on to the mapped object through the io-memory interface. A mapped region larger than 4 bytes will be internally split into multiple 4-byte mappings. Mappings larger than 4 bytes must be a multiple of 4 bytes long, and must start at a 4-byte aligned address.
|add-map||map device in a port-space|
|del-map||remove device map from a port-space|
|info||print information about the device|
|map||list port map|