lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86, setup: "glove box" BIOS interrupts in the core boot code

Browse Source 
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>
This commit is contained in:
H. Peter Anvin
2009-04-01 18:13:46 -07:00
committed by H. Peter Anvin
parent 7a734e7dd9
commit df7699c564
4 changed files with 95 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
arch/x86/boot/a20.c
View File

@@ -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)