Right. The worse case, btw, is that I don't replace su-driver, because
it has to support legacy hardware. Hopefully that isn't the case, and I
can either support the 82510 (I since found a datasheet), or (even
better) we can declare the chip unsupported.
I would not be surprised to learn that the last 82510 platform was an
older sun4c or sun4m platform.
-- Garrett
Peter Memishian wrote:
> [ CC'ing Kevin Crowe, as I think he's familiar with the sordid history of
> su_driver.c. This is well outside my area of expertise. ]
>
> > I started looking at su_driver.c. It should be be consolidated as
> > well. But one area that gives me cause for concern is comments and code
> > referencing the Intel 82510 chip.
> >
> > Is this chip found on any UltraSPARC hardware (or any hardware that we
> > need to support in OpenSolaris?)
>
> Hopefully Kevin can answer this.
>
> > I cannot find Intel's original datasheets for this part, and I'm not
> > entirely confident in this part. It looks like it probably had a FIFO,
> > but that it was accessed using some method quite different from the
> > standard 16550 UARTs.
> >
> > Should I worry about this? I don't feel that I can support the 82510
> > without further knowledge of which platform(s) used it (so I can test),
> > and without a datasheet.
> >
> > FWIW, it looks like once upon a time asy.c also had 82510 support that
> > was removed in S10. I want to take it a step further and remove 8250
> > and 16450, because I consider fifo-less UARTS to largely be useless in
> > the modern era.
>
> Clearly, removal of hardware support needs to be carefully researched to
> ensure that we are not crippling any supported platforms. Kevin, can you
> clue us in on what serial chipsets need to be supported in Nevada?
>
>
--
Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
http://www.tadpolecomputer.com/
Phone: 951 325-2134 Fax: 951 325-2191
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