[src/trunk]: src/sys/arch fix a ldtlb handling bug:

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/36e75228e460
branches:  trunk
changeset: 513737:36e75228e460
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Fri Aug 10 18:27:08 2001 +0000

description:
fix a ldtlb handling bug:

 - set to PTE{H,L,A} and call LDTLB must do atomically.
 - never call LDTLB when it's unnecessary.

Broken kernel oocasionally causes cpu reset when /etc/security is called.
Now fix this problem.

diffstat:

 sys/arch/dreamcast/dreamcast/locore.s |  3 +--
 sys/arch/evbsh3/evbsh3/locore.s       |  3 +--
 sys/arch/hpcsh/hpcsh/locore.s         |  3 +--
 sys/arch/mmeye/mmeye/locore.s         |  3 +--
 sys/arch/sh3/sh3/trap.c               |  4 +++-
 5 files changed, 7 insertions(+), 9 deletions(-)

diffs (93 lines):

diff -r 43312ea334e4 -r 36e75228e460 sys/arch/dreamcast/dreamcast/locore.s
--- a/sys/arch/dreamcast/dreamcast/locore.s     Fri Aug 10 18:24:20 2001 +0000
+++ b/sys/arch/dreamcast/dreamcast/locore.s     Fri Aug 10 18:27:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.s,v 1.8 2001/05/15 08:54:57 msaitoh Exp $       */
+/*     $NetBSD: locore.s,v 1.9 2001/08/10 18:27:12 msaitoh Exp $       */
 
 /*-
  * Copyright (c) 1993, 1994, 1995, 1997
@@ -1335,7 +1335,6 @@
        nop
        add     #4, r15         /* pop dummy code */
        EXCEPT_DISABLE
-       ldtlb
        INTRFASTEXIT
 
        .align  2
diff -r 43312ea334e4 -r 36e75228e460 sys/arch/evbsh3/evbsh3/locore.s
--- a/sys/arch/evbsh3/evbsh3/locore.s   Fri Aug 10 18:24:20 2001 +0000
+++ b/sys/arch/evbsh3/evbsh3/locore.s   Fri Aug 10 18:27:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.s,v 1.32 2001/05/15 08:54:56 msaitoh Exp $      */
+/*     $NetBSD: locore.s,v 1.33 2001/08/10 18:27:12 msaitoh Exp $      */
 
 /*-
  * Copyright (c) 1993, 1994, 1995, 1997
@@ -1336,7 +1336,6 @@
        nop
        add     #4, r15         /* pop dummy code */
        EXCEPT_DISABLE
-       ldtlb
        INTRFASTEXIT
 
        .align  2
diff -r 43312ea334e4 -r 36e75228e460 sys/arch/hpcsh/hpcsh/locore.s
--- a/sys/arch/hpcsh/hpcsh/locore.s     Fri Aug 10 18:24:20 2001 +0000
+++ b/sys/arch/hpcsh/hpcsh/locore.s     Fri Aug 10 18:27:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.s,v 1.8 2001/05/15 08:54:57 msaitoh Exp $       */
+/*     $NetBSD: locore.s,v 1.9 2001/08/10 18:27:13 msaitoh Exp $       */
 
 /*-
  * Copyright (c) 1993, 1994, 1995, 1997
@@ -1193,7 +1193,6 @@
        nop
        add     #4, r15         /* pop dummy code */
        EXCEPT_DISABLE
-       ldtlb
        INTRFASTEXIT
 
        .align  2
diff -r 43312ea334e4 -r 36e75228e460 sys/arch/mmeye/mmeye/locore.s
--- a/sys/arch/mmeye/mmeye/locore.s     Fri Aug 10 18:24:20 2001 +0000
+++ b/sys/arch/mmeye/mmeye/locore.s     Fri Aug 10 18:27:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.s,v 1.21 2001/02/05 18:14:43 thorpej Exp $      */
+/*     $NetBSD: locore.s,v 1.22 2001/08/10 18:27:13 msaitoh Exp $      */
 
 /*-
  * Copyright (c) 1993, 1994, 1995, 1997
@@ -1150,7 +1150,6 @@
        nop
        add     #4, r15         /* pop dummy code */
        EXCEPT_DISABLE
-       ldtlb
        INTRFASTEXIT
 
        .align  2
diff -r 43312ea334e4 -r 36e75228e460 sys/arch/sh3/sh3/trap.c
--- a/sys/arch/sh3/sh3/trap.c   Fri Aug 10 18:24:20 2001 +0000
+++ b/sys/arch/sh3/sh3/trap.c   Fri Aug 10 18:27:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: trap.c,v 1.27 2001/06/24 05:34:07 msaitoh Exp $        */
+/*     $NetBSD: trap.c,v 1.28 2001/08/10 18:27:08 msaitoh Exp $        */
 
 /*-
  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
@@ -691,6 +691,7 @@
 #else
                        SHREG_PTEL = pte & PTEL_VALIDBITS;
 #endif
+                       __asm __volatile ("ldtlb; nop");
 
                        return;
                }
@@ -841,6 +842,7 @@
 #endif
                        }
                }
+               __asm __volatile("ldtlb; nop");
                if (user)
                        userret(p, frame.tf_spc, sticks);
                return;