[src/trunk]: src as a stop-gap measure to allow boot-from-disk to work on hppa,

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

details:   https://anonhg.NetBSD.org/src/rev/367f14aa02a8
branches:  trunk
changeset: 580978:367f14aa02a8
user:      chs <chs%NetBSD.org@localhost>
date:      Wed May 18 13:58:10 2005 +0000

description:
as a stop-gap measure to allow boot-from-disk to work on hppa,
add some padding to the end of struct scsipi_xfer on that platform.

diffstat:

 doc/HACKS                   |  13 ++++++++++++-
 sys/dev/scsipi/scsipiconf.h |   7 ++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diffs (45 lines):

diff -r 0de947637f7a -r 367f14aa02a8 doc/HACKS
--- a/doc/HACKS Wed May 18 12:57:34 2005 +0000
+++ b/doc/HACKS Wed May 18 13:58:10 2005 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.46 2005/05/11 13:10:21 chs Exp $
+# $NetBSD: HACKS,v 1.47 2005/05/18 13:58:10 chs Exp $
 #
 # This file is intended to document workarounds for currently unsolved
 # (mostly) compiler bugs.
@@ -455,3 +455,14 @@
                gcc 3.3.3 generates bad code for dfa.c with -O2,
                reduce optimization to -O1 to avoid the bug.
        kcah
+
+       hack    hppa boot-from-disk memory corruption
+       cdate   Wed May 18 06:56:07 PDT 2005
+       who     chs
+       file    src/sys/dev/scsipi/scsipiconf.h : 1.98
+       descr
+               There is some bug with DMA on hppa that corrupts scsipi_xfer
+               structures, but it only shows up when booting from disk.
+               For now, we'll add some padding to scsipi_xfer so that
+               the corrupted memory is not otherwise used.
+       kcah
diff -r 0de947637f7a -r 367f14aa02a8 sys/dev/scsipi/scsipiconf.h
--- a/sys/dev/scsipi/scsipiconf.h       Wed May 18 12:57:34 2005 +0000
+++ b/sys/dev/scsipi/scsipiconf.h       Wed May 18 13:58:10 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: scsipiconf.h,v 1.97 2005/02/27 00:27:48 perry Exp $    */
+/*     $NetBSD: scsipiconf.h,v 1.98 2005/05/18 13:58:10 chs Exp $      */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2004 The NetBSD Foundation, Inc.
@@ -533,6 +533,11 @@
 
        struct  scsipi_generic cmdstore
            __attribute__ ((aligned (4)));/* stash the command in here */
+
+#ifdef __hppa__
+       /* XXX temp hack until we fix the memory corruption bug */
+       u_int8_t pad[32];
+#endif
 };
 
 /*