Subject: Re: sun4m kernel on Microsparc-II (SS5)?
To: Jonathan Stone <jonathan@dsg.stanford.edu>
From: Neil J. McRae <neil@domino.org>
List: port-sparc
Date: 07/10/1996 09:36:53
On Tue, 9 Jul 1996 15:11:53 -0700 (PDT) 
 Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:

> 
> >I believe uSPARC-2 support is now in the 1.2 release branch.
> 
> That turns to not be completely the case. Partial MicroSPARC-II
> support, perhaps. However, sys/arch/sparc/sparc/pmap.c:pmap_enter4m()
> has the fragment
> 
> 	/* Initialise pteproto with cache bit */
> 	pteproto = (pa & PMAP_NC) == 0 ? SRMMU_PG_C : 0;
> 
> 	if (pa & PMAP_TYPE4M) {		/* this page goes in an iospace */
> 		if (cpumod == SUN4M_MS)
> 			panic("pmap_enter4m: attempt to use 36-bit iospace on"
> 			      " MicroSPARC");
> 		pteproto |= (pa & PMAP_TYPE4M) << PMAP_PTESHFT4M;
> 	}
> 
> which is precisely the panic i encountered. That doesn't look
> like MicroSPARC support to me...
> 

Hmm, thats strange as I know a couple of people running it on SS5's
Albeit with the cache disabled..

Neil.
--
Neil J. McRae. Alive and Kicking.       Domino: In the glow of the night.
neil@DOMINO.ORG        NetBSD/sparc: 100% SpF (Solaris protection Factor) 
  Free the daemon in your computer!