linux/arch/x86/boot/voyager.c
Andi Kleen a6b68076fd x86: compile apm and voyager module only when selected in Kconfig
Previously the complete files were #ifdef'ed, but now handle that in the
Makefile.

May save a minor bit of compilation time.

[ Stephen Rothwell <sfr@canb.auug.org.au>: build dependency fix ]
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:49 +01:00

42 lines
989 B
C

/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
*
* ----------------------------------------------------------------------- */
/*
* arch/i386/boot/voyager.c
*
* Get the Voyager config information
*/
#include "boot.h"
int query_voyager(void)
{
u8 err;
u16 es, di;
/* Abuse the apm_bios_info area for this */
u8 *data_ptr = (u8 *)&boot_params.apm_bios_info;
data_ptr[0] = 0xff; /* Flag on config not found(?) */
asm("pushw %%es ; "
"int $0x15 ; "
"setc %0 ; "
"movw %%es, %1 ; "
"popw %%es"
: "=q" (err), "=r" (es), "=D" (di)
: "a" (0xffc0));
if (err)
return -1; /* Not Voyager */
set_fs(es);
copy_from_fs(data_ptr, di, 7); /* Table is 7 bytes apparently */
return 0;
}