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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 | 9 | #include <linux/pm.h> |
88ca0557 | 10 | #include <linux/of.h> |
cdb3592a | 11 | |
cdb3592a DM |
12 | #include <asm/oplib.h> |
13 | #include <asm/prom.h> | |
d550bbd4 | 14 | #include <asm/setup.h> |
cdb3592a DM |
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 | { | |
88ca0557 | 29 | if (!of_node_is_type(of_console_device, "serial") || scons_pwroff) |
cdb3592a DM |
30 | prom_halt_power_off(); |
31 | ||
32 | prom_halt(); | |
33 | } | |
34 | ||
35 | void machine_halt(void) | |
36 | { | |
cdb3592a DM |
37 | prom_halt(); |
38 | panic("Halt failed!"); | |
39 | } | |
40 | ||
41 | void machine_restart(char *cmd) | |
42 | { | |
43 | char *p; | |
44 | ||
cdb3592a DM |
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 |