Subject: Re: Problems flushing cache with KUSEG addresses
To: Warner Losh <email@example.com>
From: Jason R Thorpe <firstname.lastname@example.org>
Date: 07/27/2000 06:56:29
On Wed, Jul 26, 2000 at 11:47:15PM -0600, Warner Losh wrote:
> The R4000 models, usually known as MIPS Magnums or Magnum 4000, will
> work in either endian mode. In the little endian mode, it is
> supported by the NetBSD/arc port. It is also known as Microsoft Jazz.
> In big endian mode, no free OS that I'm aware of supports this. The
> big endian mode support would be nice because you can run that with a
> serial console while the little endian mode requires a special,
> expensive video card.
Yah, but that graphics card (well, at least the INMOS-based one in
mine) sure looks great at 1280x1024 on a 17'' SGI display :-)
Anyway, the fact that little-endian mode doesn't support serial
console explains why my 4000PC behaved differently than the
Big-endian mode on the 4000 could probably be easily supported by
NetBSD/mipsco, eventually. I mean, it's just the same thing as
NetBSD/arc supports (and could use the same drivers!), but would
need different header files (and do byte-swapping bus_space, etc.)
That could be a fun project.
-- Jason R. Thorpe <email@example.com>