In <Pine.NEB.4.21.0006251822410.17049-100000@ehorvath>
eeh@turbolinux.com wrote:

> OTOH, machines that cannot set up inverse-endian mappings will need to
> handle byte-swapping as needed in the bus_dmamem*() accessors the same way
> it's currently done with bus_space*() accessors.

Just FYI, smc83c170 (epic at pci) has real working "big endian mode."
It can handle byte-swapping of dmamem by its own hardware and
no extra software/hardware supports are needed.
It works fine on macppc without any byte-swapping functions.
---
Izumi Tsutsui
tsutsui@ceres.dti.ne.jp