grub/grub-core/lib/i386/reboot_trampoline.S

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2011 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/symbol.h>
#include <grub/i386/reboot.h>
.p2align 4
VARIABLE(grub_reboot_start)
.code16
/* set 0x472 to 0x0000 for cold boot (0x1234 for warm boot) */
movw $0x0472, %di
xorw %ax, %ax
movw %ax, (%di)
ljmp $0xf000, $0xfff0
.code32
VARIABLE(grub_reboot_end)