41 lines
958 B
C
41 lines
958 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.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* 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;
|
|
}
|