diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2009-04-01 18:13:46 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-04-09 16:08:11 -0700 |
| commit | df7699c56421c0476704f24a43409ac8c505f3d2 (patch) | |
| tree | c8d5935a5bd7dd59b0ce70db1a53999090be938b /arch/x86/boot/a20.c | |
| parent | 7a734e7dd93b9aea08ed51036a9a0e2c9dfd8dac (diff) | |
| download | linux-3.10-df7699c56421c0476704f24a43409ac8c505f3d2.tar.gz linux-3.10-df7699c56421c0476704f24a43409ac8c505f3d2.tar.bz2 linux-3.10-df7699c56421c0476704f24a43409ac8c505f3d2.zip | |
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.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/boot/a20.c b/arch/x86/boot/a20.c index 7c19ce8c244..64a31a6d751 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) |