diff options
| author | briggs <briggs@cvs.openbsd.org> | 1997-04-08 17:30:24 +0000 |
|---|---|---|
| committer | briggs <briggs@cvs.openbsd.org> | 1997-04-08 17:30:24 +0000 |
| commit | 9b40fac6f08d37fa7a996fd91e12aab93dee1d74 (patch) | |
| tree | b22e48bd539fbc843bbcd075ac2cf8ae65d29534 /sys | |
| parent | 18765111aba1a3eb43303f2969c61f1557cf3f77 (diff) | |
SunOS uses trap 2 to clear cpu caches. From NetBSD via scottr and gwr.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/sun3/sun3/trap.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/sys/arch/sun3/sun3/trap.c b/sys/arch/sun3/sun3/trap.c index f3eb4d052d9..a1a0f877f93 100644 --- a/sys/arch/sun3/sun3/trap.c +++ b/sys/arch/sun3/sun3/trap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: trap.c,v 1.15 1997/02/21 06:07:28 deraadt Exp $ */ +/* $OpenBSD: trap.c,v 1.16 1997/04/08 17:30:23 briggs Exp $ */ /* $NetBSD: trap.c,v 1.63-1.65ish 1997/01/16 15:41:40 gwr Exp $ */ /* @@ -413,12 +413,16 @@ trap(type, code, v, frame) case T_TRAP15|T_USER: /* SUN user trace trap */ #ifdef COMPAT_SUNOS /* - * SunOS seems to use Trap #2 for some obscure fpu operations. - * So far, just ignore it, but DONT trap on it... - * (i.e. do not deliver a signal for it) - */ - if (p->p_emul == &emul_sunos) - goto douret; + * SunOS uses Trap #2 for a "CPU cache flush" + * Just flush the on-chip caches and return. + * XXX - Too bad NetBSD uses trap 2... + */ + if (p->p_emul == &emul_sunos) { + ICIA(); + DCIU(); + /* get out fast */ + return; + } #endif frame.f_sr &= ~PSL_T; sig = SIGTRAP; |