On Thu, Feb 26, 1998 at 09:34:05AM -0800, William J. Earl wrote:

for cache size.  The R4600 and R5000 are also similar, but with
a very different cache organization from the R4000 and R4400.  Various
revision of the processors (and more than one revision was shipped
for each processor) have different errata, so the kernel must work around
various processor errata according to the processor type and revision.

In case of the R4000 we still have some work to do with respect to the
errata stuff.

As I understand it, the currently checked-in source must be recompiled
to provide R4600/R5000 PC and SC versions for Indy, and those versions
may not be fully tested on all R4000 and R4400 revisions.  In the not
distant future, a single kernel will likely support all the processors,
as does the IRIX kernel, but that is more work than just selecting
the processor type at compile time.

The code in the CVS archive is plain buggy for certain configurations.
Given the number of possible configurations possible everything else but
a single kernel binary would be braindead.  Especially because the price
we have to pay for a single Indy binary isn't that high.

  Ralf