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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222/* 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);
/** * enum hw_protection_action - Hardware protection action * * @HWPROT_ACT_DEFAULT: * The default action should be taken. This is HWPROT_ACT_SHUTDOWN * by default, but can be overridden. * @HWPROT_ACT_SHUTDOWN: * The system should be shut down (powered off) for HW protection. * @HWPROT_ACT_REBOOT: * The system should be rebooted for HW protection. */enum hw_protection_action { HWPROT_ACT_DEFAULT, HWPROT_ACT_SHUTDOWN, HWPROT_ACT_REBOOT };
void __hw_protection_trigger(const char *reason, int ms_until_forced, enum hw_protection_action action);
/** * hw_protection_trigger - Trigger default emergency system hardware protection action * * @reason: Reason of emergency shutdown or reboot to be printed. * @ms_until_forced: Time to wait for orderly shutdown or reboot before * triggering it. Negative value disables the forced * shutdown or reboot. * * Initiate an emergency system shutdown or reboot in order to protect * hardware from further damage. The exact action taken is controllable at * runtime and defaults to shutdown. */static inline void hw_protection_trigger(const char *reason, int ms_until_forced){ __hw_protection_trigger(reason, ms_until_forced, HWPROT_ACT_DEFAULT);}
/* * Emergency restart, callable from an interrupt handler. */
extern void emergency_restart(void);#include <asm/emergency-restart.h>
#endif /* _LINUX_REBOOT_H */