Subject: Re: bus_dma'ed DEFTA driver committed.
To: Jason Thorpe <email@example.com>
From: Warner Losh <firstname.lastname@example.org>
Date: 05/26/1998 22:36:26
In message <199805270424.VAA08150@lestat.nas.nasa.gov> Jason Thorpe writes:
: Flushing the write buffer certainly is necessary... at least in the
: Alpha architecture, the write buffer could be thought of as even
: before the primary cache, since the chip may attempt write combining.
OK. Things are a little different on the MIPS because uncached access
to a memory location is uncached. No write combination happens. This
is an observation, not something I recalled reading somewhere, so I'll
defer to those with greater knowledge in this area if it turns out
that I somehow got lucky.