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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cdb3592a DM |
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> | |
066bcaca | 8 | #include <linux/export.h> |
cdb3592a DM |
9 | #include <linux/pm.h> |
10 | ||
cdb3592a DM |
11 | #include <asm/oplib.h> |
12 | #include <asm/prom.h> | |
d550bbd4 | 13 | #include <asm/setup.h> |
cdb3592a DM |
14 | |
15 | /* sysctl - toggle power-off restriction for serial console | |
16 | * systems in machine_power_off() | |
17 | */ | |
18 | int scons_pwroff = 1; | |
19 | ||
20 | /* This isn't actually used, it exists merely to satisfy the | |
21 | * reference in kernel/sys.c | |
22 | */ | |
23 | void (*pm_power_off)(void) = machine_power_off; | |
24 | EXPORT_SYMBOL(pm_power_off); | |
25 | ||
26 | void machine_power_off(void) | |
27 | { | |
cdb3592a DM |
28 | if (strcmp(of_console_device->type, "serial") || scons_pwroff) |
29 | prom_halt_power_off(); | |
30 | ||
31 | prom_halt(); | |
32 | } | |
33 | ||
34 | void machine_halt(void) | |
35 | { | |
cdb3592a DM |
36 | prom_halt(); |
37 | panic("Halt failed!"); | |
38 | } | |
39 | ||
40 | void machine_restart(char *cmd) | |
41 | { | |
42 | char *p; | |
43 | ||
cdb3592a DM |
44 | p = strchr(reboot_command, '\n'); |
45 | if (p) | |
46 | *p = 0; | |
47 | if (cmd) | |
48 | prom_reboot(cmd); | |
49 | if (*reboot_command) | |
50 | prom_reboot(reboot_command); | |
51 | prom_reboot(""); | |
52 | panic("Reboot failed!"); | |
53 | } | |
54 |