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authorragge <ragge@NetBSD.org>2023-03-26 12:21:09 +0000
committerragge <ragge@NetBSD.org>2023-03-26 12:21:09 +0000
commit8cd451ffd08e46b464f5fa93e3548d8aede30a2c (patch)
tree298fc7c6f5925488bb44f717238a8727024bba3c /sys/arch
parentdadf14f69f47497ba3f13f5068f196aa8c87455f (diff)
Ensure that the kernel do not try to allocate a S0 segment larger than 1G,
since the hardware prohibits that.
Diffstat (limited to 'sys/arch')
-rw-r--r--sys/arch/vax/vax/pmap.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/sys/arch/vax/vax/pmap.c b/sys/arch/vax/vax/pmap.c
index b0922bba348..a7233a9adcf 100644
--- a/sys/arch/vax/vax/pmap.c
+++ b/sys/arch/vax/vax/pmap.c
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.195 2022/12/11 18:02:40 oster Exp $ */
+/* $NetBSD: pmap.c,v 1.196 2023/03/26 12:21:09 ragge Exp $ */
/*
* Copyright (c) 1994, 1998, 1999, 2003 Ludd, University of Lule}, Sweden.
* All rights reserved.
@@ -25,7 +25,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.195 2022/12/11 18:02:40 oster Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.196 2023/03/26 12:21:09 ragge Exp $");
#include "opt_ddb.h"
#include "opt_cputype.h"
@@ -276,6 +276,15 @@ pmap_bootstrap(void)
usrptsize = (avail_end/(20 * PPTESZ)) * VAX_NBPG;
kvmsize = calc_kvmsize(usrptsize);
+ /*
+ * Ensure that not more than 1G is allocated, since that is
+ * max size of S0 space.
+ * Also note that for full S0 space the SLR should be 0x200000,
+ * since the comparison in the vax microcode is >= SLR.
+ */
+#define S0SPACE (1*1024*1024*1024)
+ if (kvmsize > S0SPACE)
+ kvmsize = S0SPACE;
sysptsize = kvmsize >> VAX_PGSHIFT;
/*
* Virtual_* and avail_* is used for mapping of system page table.