Merge tag 'for-linus' of git://github.com/openrisc/linux
[linux-2.6-microblaze.git] / arch / sparc / kernel / reboot.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* reboot.c: reboot/shutdown/halt/poweroff handling
3  *
4  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
5  */
6 #include <linux/kernel.h>
7 #include <linux/reboot.h>
8 #include <linux/export.h>
9 #include <linux/pm.h>
10 #include <linux/of.h>
11
12 #include <asm/oplib.h>
13 #include <asm/prom.h>
14 #include <asm/setup.h>
15
16 /* sysctl - toggle power-off restriction for serial console
17  * systems in machine_power_off()
18  */
19 int scons_pwroff = 1;
20
21 /* This isn't actually used, it exists merely to satisfy the
22  * reference in kernel/sys.c
23  */
24 void (*pm_power_off)(void) = machine_power_off;
25 EXPORT_SYMBOL(pm_power_off);
26
27 void machine_power_off(void)
28 {
29         if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
30                 prom_halt_power_off();
31
32         prom_halt();
33 }
34
35 void machine_halt(void)
36 {
37         prom_halt();
38         panic("Halt failed!");
39 }
40
41 void machine_restart(char *cmd)
42 {
43         char *p;
44
45         p = strchr(reboot_command, '\n');
46         if (p)
47                 *p = 0;
48         if (cmd)
49                 prom_reboot(cmd);
50         if (*reboot_command)
51                 prom_reboot(reboot_command);
52         prom_reboot("");
53         panic("Reboot failed!");
54 }
55