> Date: Sat, 7 Feb 1998 14:12:00 +0100
> From: Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>

> At 4:12 Uhr +0100 05.02.1998, Gordon W. Ross wrote:
> 
> >BTW, we no longer use "trap #2" for kernel breakpoints, so we
> >could now easily let it mean "flush the I-cache".  Good idea?
> 
> ...but the 1.3B arch/mac68k/mac68k/trap.c has
> 
> /*      $NetBSD: trap.c,v 1.55 1997/11/07 07:33:15 scottr Exp $ */
> 
> [...]
> 
>         /*
>          * Trace traps.
>          *
>          * M68k NetBSD uses trap #2,

That comment is no longer correct.  NetBSD now uses trap #15 for
breakpoints (or "trace" traps).

>          * SUN 3.x uses trap #15,
(and now NetBSD does also.)

> #ifdef COMPAT_SUNOS
>                 /*
>                  * SunOS uses Trap #2 for a "CPU cache flush"
>                  * Just flush the on-chip caches and return.
>                  * XXX - Too bad NetBSD uses trap 2...
>                  */
> 
> 
> >Again, gcc could just do "trap #2" on both SunOS and NetBSD...
> >
> >Gordon
> 
> - ???

Now the only cause of trap #2 should be SunOS I-cache flush.