From 48e0419748d350d5519d688dd5480e19d99bc5c4 Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@cvs.openbsd.org>
Date: Sat, 14 Feb 2009 18:51:04 +0000
Subject: Limit the amount of physical memory to 2GB.  Using more causes memory
 corruption on PA-RISC 2.0 systems (and there are very few PA-RISC 1.1 systems
 that support more than 2GB).

ok miod@
---
 sys/arch/hppa/hppa/machdep.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'sys')

diff --git a/sys/arch/hppa/hppa/machdep.c b/sys/arch/hppa/hppa/machdep.c
index 51c1d3c09ac..58188d3c89d 100644
--- a/sys/arch/hppa/hppa/machdep.c
+++ b/sys/arch/hppa/hppa/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.170 2009/02/04 17:22:23 miod Exp $	*/
+/*	$OpenBSD: machdep.c,v 1.171 2009/02/14 18:51:03 kettenis Exp $	*/
 
 /*
  * Copyright (c) 1999-2003 Michael Shalayeff
@@ -364,8 +364,18 @@ hppa_init(start)
 	fdcacheall();
 
 	avail_end = trunc_page(PAGE0->imm_max_mem);
+	/*
+	 * XXX For some reason, using any physical memory above the
+	 * 2GB marker causes memory corruption on PA-RISC 2.0
+	 * machines.  Cap physical memory at 2GB for now.
+	 */
+#if 0
 	if (avail_end > SYSCALLGATE)
 		avail_end = SYSCALLGATE;
+#else
+	if (avail_end > 0x80000000)
+		avail_end = 0x80000000;
+#endif
 	physmem = atop(avail_end);
 	resvmem = atop(((vaddr_t)&kernel_text));
 
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