1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program 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 2 of the
* License, or any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* Standard PC-BIOS reboot mechanism
*
*/
#include <ipxe/reboot.h>
#include <realmode.h>
#include <bios.h>
#include <ipxe/apm.h>
#include <ipxe/acpipwr.h>
/**
* Reboot system
*
* @v warm Perform a warm reboot
*/
static void bios_reboot ( int warm ) {
uint16_t flag;
/* Configure BIOS for cold/warm reboot */
flag = ( warm ? BDA_REBOOT_WARM : 0 );
put_real ( flag, BDA_SEG, BDA_REBOOT );
/* Jump to system reset vector */
__asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) : );
}
/**
* Power off system
*
* @ret rc Return status code
*/
static int bios_poweroff ( void ) {
int rc;
/* Try APM */
if ( ( rc = apm_poweroff() ) != 0 )
DBG ( "APM power off failed: %s\n", strerror ( rc ) );
/* Try ACPI */
if ( ( rc = acpi_poweroff() ) != 0 )
DBG ( "ACPI power off failed: %s\n", strerror ( rc ) );
return rc;
}
PROVIDE_REBOOT ( pcbios, reboot, bios_reboot );
PROVIDE_REBOOT ( pcbios, poweroff, bios_poweroff );
|
