| /* -*- 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" |
| |
| #ifdef CONFIG_X86_VOYAGER |
| |
| 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" |
| : "=qm" (err), "=rm" (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; |
| } |
| |
| #endif /* CONFIG_X86_VOYAGER */ |