[src/trunk]: src/sys/arch/arm/arm32 In pmap_map_chunk(), if we can't use a se...

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

details:   https://anonhg.NetBSD.org/src/rev/35cb4f5e91fb
branches:  trunk
changeset: 522550:35cb4f5e91fb
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Thu Feb 21 06:36:11 2002 +0000

description:
In pmap_map_chunk(), if we can't use a section mapping, then
make sure that the L1 slot for the current VA points to an L2
table, and panic if it doesn't.

diffstat:

 sys/arch/arm/arm32/pmap.c |  13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diffs (34 lines):

diff -r 8e454441695b -r 35cb4f5e91fb sys/arch/arm/arm32/pmap.c
--- a/sys/arch/arm/arm32/pmap.c Thu Feb 21 06:33:05 2002 +0000
+++ b/sys/arch/arm/arm32/pmap.c Thu Feb 21 06:36:11 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.44 2002/02/21 05:25:24 thorpej Exp $        */
+/*     $NetBSD: pmap.c,v 1.45 2002/02/21 06:36:11 thorpej Exp $        */
 
 /*
  * Copyright (c) 2001 Richard Earnshaw
@@ -142,7 +142,7 @@
 #include <machine/param.h>
 #include <arm/arm32/katelib.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.44 2002/02/21 05:25:24 thorpej Exp $");        
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.45 2002/02/21 06:36:11 thorpej Exp $");        
 #ifdef PMAP_DEBUG
 #define        PDEBUG(_lev_,_stat_) \
        if (pmap_debug_level >= (_lev_)) \
@@ -3824,6 +3824,15 @@
                        continue;
                }
 
+               /*
+                * Ok, we're going to use an L2 table.  Make sure
+                * one is actually in the corresponding L1 slot
+                * for the current VA.
+                */
+               if ((pde[va >> PDSHIFT] & L1_MASK) != L1_PAGE)
+                       panic("pmap_map_chunk: no L2 table for VA 0x%08lx\n",
+                           va);
+
                /* See if we can use a L2 large page mapping. */
                if (((pa | va) & (L2_LPAGE_SIZE - 1)) == 0 &&
                    resid >= L2_LPAGE_SIZE) {