Re: R5000 support (specifically two-way set-associative cache...)

[Ralf Baechle <ralf@oss.sgi.com>]

On Mon, Jun 19, 2000 at 03:58:40PM -0700, Jun Sun wrote:

> I looked into the R5000 support and have a couple of questions:
> 
> 1. Is R5000, specifically NEC Vr5000, fully supported?  I have seen
> CONFIG_CPU_R5000 defined, but it does not appear to do much.

Indeed, the various CPU options for the R4xxx / R5xxx CPUs mostly deal
with C compiler options as a minor optimization.

> 2. Specifically, NEC Vr5000 has two-way set-associative cache.  I
> browsed through the cache code, and got concerned that I don't see any
> code that seems to take care of that.  Do I miss something?

Yes :-)

The R5000 has R4600 style caches, so also uses the same code.

> 3. I understand Geert has a port to DDB5074 (with Vr5000 CPU).  Is this
> port completed (including all interrupts, PCI related stuff).  Is this
> port reliable?

I leave the question to Geert to answer.

  Ralf