1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_REBOOT_H
3 #define _LINUX_REBOOT_H
4
5
6 #include <linux/notifier.h>
7 #include <uapi/linux/reboot.h>
8
9 struct device;
10
11 #define SYS_DOWN 0x0001 /* Notify of system down */
12 #define SYS_RESTART SYS_DOWN
13 #define SYS_HALT 0x0002 /* Notify of system halt */
14 #define SYS_POWER_OFF 0x0003 /* Notify of system power off */
15
16 enum reboot_mode {
17 REBOOT_UNDEFINED = -1,
18 REBOOT_COLD = 0,
19 REBOOT_WARM,
20 REBOOT_HARD,
21 REBOOT_SOFT,
22 REBOOT_GPIO,
23 };
24 extern enum reboot_mode reboot_mode;
25 extern enum reboot_mode panic_reboot_mode;
26
27 enum reboot_type {
28 BOOT_TRIPLE = 't',
29 BOOT_KBD = 'k',
30 BOOT_BIOS = 'b',
31 BOOT_ACPI = 'a',
32 BOOT_EFI = 'e',
33 BOOT_CF9_FORCE = 'p',
34 BOOT_CF9_SAFE = 'q',
35 };
36 extern enum reboot_type reboot_type;
37
38 extern int reboot_default;
39 extern int reboot_cpu;
40 extern int reboot_force;
41
42
43 extern int register_reboot_notifier(struct notifier_block *);
44 extern int unregister_reboot_notifier(struct notifier_block *);
45
46 extern int devm_register_reboot_notifier(struct device *, struct notifier_block *);
47
48 extern int register_restart_handler(struct notifier_block *);
49 extern int unregister_restart_handler(struct notifier_block *);
50 extern void do_kernel_restart(char *cmd);
51
52 #ifdef CONFIG_NO_GKI
53 extern int register_pre_restart_handler(struct notifier_block *nb);
54 extern int unregister_pre_restart_handler(struct notifier_block *nb);
55 extern void do_kernel_pre_restart(char *cmd);
56 #else
register_pre_restart_handler(struct notifier_block * nb)57 static inline int register_pre_restart_handler(struct notifier_block *nb)
58 {
59 return 0;
60 }
61
unregister_pre_restart_handler(struct notifier_block * nb)62 static inline int unregister_pre_restart_handler(struct notifier_block *nb)
63 {
64 return 0;
65 }
66
do_kernel_pre_restart(char * cmd)67 static inline void do_kernel_pre_restart(char *cmd)
68 {
69 }
70 #endif
71
72 /*
73 * Architecture-specific implementations of sys_reboot commands.
74 */
75
76 extern void migrate_to_reboot_cpu(void);
77 extern void machine_restart(char *cmd);
78 extern void machine_halt(void);
79 extern void machine_power_off(void);
80
81 extern void machine_shutdown(void);
82 struct pt_regs;
83 extern void machine_crash_shutdown(struct pt_regs *);
84
85 /*
86 * Architecture independent implemenations of sys_reboot commands.
87 */
88
89 extern void kernel_restart_prepare(char *cmd);
90 extern void kernel_restart(char *cmd);
91 extern void kernel_halt(void);
92 extern void kernel_power_off(void);
93
94 extern int C_A_D; /* for sysctl */
95 void ctrl_alt_del(void);
96
97 #define POWEROFF_CMD_PATH_LEN 256
98 extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
99
100 extern void orderly_poweroff(bool force);
101 extern void orderly_reboot(void);
102
103 /*
104 * Emergency restart, callable from an interrupt handler.
105 */
106
107 extern void emergency_restart(void);
108 #include <asm/emergency-restart.h>
109
110 #endif /* _LINUX_REBOOT_H */
111