[librm] Ensure that inline code symbols are unique
[ipxe.git] / src / arch / x86 / interface / pcbios / bios_reboot.c
1 /*
2 * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * Standard PC-BIOS reboot mechanism
29 *
30 */
31
32 #include <ipxe/reboot.h>
33 #include <realmode.h>
34 #include <bios.h>
35 #include <ipxe/apm.h>
36 #include <ipxe/acpipwr.h>
37
38 /**
39 * Reboot system
40 *
41 * @v warm Perform a warm reboot
42 */
43 static void bios_reboot ( int warm ) {
44 uint16_t flag;
45
46 /* Configure BIOS for cold/warm reboot */
47 flag = ( warm ? BDA_REBOOT_WARM : 0 );
48 put_real ( flag, BDA_SEG, BDA_REBOOT );
49
50 /* Jump to system reset vector */
51 __asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) : );
52 }
53
54 /**
55 * Power off system
56 *
57 * @ret rc Return status code
58 */
59 static int bios_poweroff ( void ) {
60 int rc;
61
62 /* Try APM */
63 if ( ( rc = apm_poweroff() ) != 0 )
64 DBG ( "APM power off failed: %s\n", strerror ( rc ) );
65
66 /* Try ACPI */
67 if ( ( rc = acpi_poweroff() ) != 0 )
68 DBG ( "ACPI power off failed: %s\n", strerror ( rc ) );
69
70 return rc;
71 }
72
73 PROVIDE_REBOOT ( pcbios, reboot, bios_reboot );
74 PROVIDE_REBOOT ( pcbios, poweroff, bios_poweroff );