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authorH. Peter Anvin <hpa@linux.intel.com>2009-04-02 05:13:46 +0400
committerH. Peter Anvin <hpa@zytor.com>2009-04-10 03:08:11 +0400
commitdf7699c56421c0476704f24a43409ac8c505f3d2 (patch)
treec8d5935a5bd7dd59b0ce70db1a53999090be938b /arch/x86/boot/a20.c
parent7a734e7dd93b9aea08ed51036a9a0e2c9dfd8dac (diff)
downloadlinux-df7699c56421c0476704f24a43409ac8c505f3d2.tar.xz
x86, setup: "glove box" BIOS interrupts in the core boot code
Impact: BIOS proofing "Glove box" off BIOS interrupts in the core boot code. LKML-Reference: <49DE7F79.4030106@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/boot/a20.c')
-rw-r--r--arch/x86/boot/a20.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/boot/a20.c b/arch/x86/boot/a20.c
index 7c19ce8c2442..64a31a6d751a 100644
--- a/arch/x86/boot/a20.c
+++ b/arch/x86/boot/a20.c
@@ -2,7 +2,7 @@
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007-2008 rPath, Inc. - All Rights Reserved
- * Copyright 2009 Intel Corporation
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
@@ -90,8 +90,11 @@ static int a20_test_long(void)
static void enable_a20_bios(void)
{
- asm volatile("pushfl; int $0x15; popfl"
- : : "a" ((u16)0x2401));
+ struct biosregs ireg;
+
+ initregs(&ireg);
+ ireg.ax = 0x2401;
+ intcall(0x15, &ireg, NULL);
}
static void enable_a20_kbc(void)