[src/trunk]: src/sys/arch/x86/x86 make a diagnostic message more informative.

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

details:   https://anonhg.NetBSD.org/src/rev/beaa2cf33d00
branches:  trunk
changeset: 787775:beaa2cf33d00
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Jul 02 22:39:45 2013 +0000

description:
make a diagnostic message more informative.

diffstat:

 sys/arch/x86/x86/bus_dma.c |  11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diffs (33 lines):

diff -r cffa16e8554e -r beaa2cf33d00 sys/arch/x86/x86/bus_dma.c
--- a/sys/arch/x86/x86/bus_dma.c        Tue Jul 02 20:53:10 2013 +0000
+++ b/sys/arch/x86/x86/bus_dma.c        Tue Jul 02 22:39:45 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.69 2012/12/08 12:36:31 kiyohara Exp $    */
+/*     $NetBSD: bus_dma.c,v 1.70 2013/07/02 22:39:45 christos Exp $    */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2007 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.69 2012/12/08 12:36:31 kiyohara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.70 2013/07/02 22:39:45 christos Exp $");
 
 /*
  * The following is included because _bus_dma_uiomove is derived from
@@ -802,9 +802,12 @@
 #ifdef DIAGNOSTIC
        if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) {
                if (offset >= map->dm_mapsize)
-                       panic("_bus_dmamap_sync: bad offset");
+                       panic("_bus_dmamap_sync: bad offset 0x%jx >= 0x%jx",
+                       (intmax_t)offset, (intmax_t)map->dm_mapsize);
                if ((offset + len) > map->dm_mapsize)
-                       panic("_bus_dmamap_sync: bad length");
+                       panic("_bus_dmamap_sync: bad length 0x%jx + 0x%jx "
+                           "> 0x%jx", (intmax_t)offset, (intmax_t)len,
+                           (intmax_t)map->dm_mapsize);
        }
 #endif