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