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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_REBOOT_H
#define _LINUX_REBOOT_H
#include <linux/notifier.h>
#include <uapi/linux/reboot.h>
struct device;
struct sys_off_handler;
#define SYS_DOWN 0x0001 /* Notify of system down */
#define SYS_RESTART SYS_DOWN
#define SYS_HALT 0x0002 /* Notify of system halt */
#define SYS_POWER_OFF 0x0003 /* Notify of system power off */
enum reboot_mode {
REBOOT_UNDEFINED = -1,
REBOOT_COLD = 0,
REBOOT_WARM,
REBOOT_HARD,
REBOOT_SOFT,
REBOOT_GPIO,
};
extern enum reboot_mode reboot_mode;
extern enum reboot_mode panic_reboot_mode;
enum reboot_type {
BOOT_TRIPLE = 't',
BOOT_KBD = 'k',
BOOT_BIOS = 'b',
BOOT_ACPI = 'a',
BOOT_EFI = 'e',
BOOT_CF9_FORCE = 'p',
BOOT_CF9_SAFE = 'q',
};
extern enum reboot_type reboot_type;
extern int reboot_default;
extern int reboot_cpu;
extern int reboot_force;
extern int register_reboot_notifier(struct notifier_block *);
extern int unregister_reboot_notifier(struct notifier_block *);
extern int devm_register_reboot_notifier(struct device *, struct notifier_block *);
extern int register_restart_handler(struct notifier_block *);
extern int unregister_restart_handler(struct notifier_block *);
extern void do_kernel_restart(char *cmd);
/*
* Architecture-specific implementations of sys_reboot commands.
*/
extern void migrate_to_reboot_cpu(void);
extern void machine_restart(char *cmd);
extern void machine_halt(void);
extern void machine_power_off(void);
extern void machine_shutdown(void);
struct pt_regs;
extern void machine_crash_shutdown(struct pt_regs *);
void do_kernel_power_off(void);
/*
* sys-off handler API.
*/
/*
* Standard sys-off priority levels. Users are expected to set priorities
* relative to the standard levels.
*
* SYS_OFF_PRIO_PLATFORM: Use this for platform-level handlers.
*
* SYS_OFF_PRIO_LOW: Use this for handler of last resort.
*
* SYS_OFF_PRIO_DEFAULT: Use this for normal handlers.
*
* SYS_OFF_PRIO_HIGH: Use this for higher priority handlers.
*
* SYS_OFF_PRIO_FIRMWARE: Use this if handler uses firmware call.
*/
#define SYS_OFF_PRIO_PLATFORM -256
#define SYS_OFF_PRIO_LOW -128
#define SYS_OFF_PRIO_DEFAULT 0
#define SYS_OFF_PRIO_HIGH 192
#define SYS_OFF_PRIO_FIRMWARE 224
enum sys_off_mode {
/**
* @SYS_OFF_MODE_POWER_OFF_PREPARE:
*
* Handlers prepare system to be powered off. Handlers are
* allowed to sleep.
*/
SYS_OFF_MODE_POWER_OFF_PREPARE,
/**
* @SYS_OFF_MODE_POWER_OFF:
*
* Handlers power-off system. Handlers are disallowed to sleep.
*/
SYS_OFF_MODE_POWER_OFF,
/**
* @SYS_OFF_MODE_RESTART_PREPARE:
*
* Handlers prepare system to be restarted. Handlers are
* allowed to sleep.
*/
SYS_OFF_MODE_RESTART_PREPARE,
/**
* @SYS_OFF_MODE_RESTART:
*
* Handlers restart system. Handlers are disallowed to sleep.
*/
SYS_OFF_MODE_RESTART,
};
/**
* struct sys_off_data - sys-off callback argument
*
* @mode: Mode ID. Currently used only by the sys-off restart mode,
* see enum reboot_mode for the available modes.
* @cb_data: User's callback data.
* @cmd: Command string. Currently used only by the sys-off restart mode,
* NULL otherwise.
* @dev: Device of the sys-off handler. Only if known (devm_register_*),
* NULL otherwise.
*/
struct sys_off_data {
int mode;
void *cb_data;
const char *cmd;
struct device *dev;
};
struct sys_off_handler *
register_sys_off_handler(enum sys_off_mode mode,
int priority,
int (*callback)(struct sys_off_data *data),
void *cb_data);
void unregister_sys_off_handler(struct sys_off_handler *handler);
int devm_register_sys_off_handler(struct device *dev,
enum sys_off_mode mode,
int priority,
int (*callback)(struct sys_off_data *data),
void *cb_data);
int devm_register_power_off_handler(struct device *dev,
int (*callback)(struct sys_off_data *data),
void *cb_data);
int devm_register_restart_handler(struct device *dev,
int (*callback)(struct sys_off_data *data),
void *cb_data);
int register_platform_power_off(void (*power_off)(void));
void unregister_platform_power_off(void (*power_off)(void));
/*
* Architecture independent implemenations of sys_reboot commands.
*/
extern void kernel_restart_prepare(char *cmd);
extern void kernel_restart(char *cmd);
extern void kernel_halt(void);
extern void kernel_power_off(void);
extern bool kernel_can_power_off(void);
void ctrl_alt_del(void);
extern void orderly_poweroff(bool force);
extern void orderly_reboot(void);
void __hw_protection_shutdown(const char *reason, int ms_until_forced, bool shutdown);
static inline void hw_protection_reboot(const char *reason, int ms_until_forced)
{
__hw_protection_shutdown(reason, ms_until_forced, false);
}
static inline void hw_protection_shutdown(const char *reason, int ms_until_forced)
{
__hw_protection_shutdown(reason, ms_until_forced, true);
}
/*
* Emergency restart, callable from an interrupt handler.
*/
extern void emergency_restart(void);
#include <asm/emergency-restart.h>
#endif /* _LINUX_REBOOT_H */
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