/* 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); /* * Emergency restart, callable from an interrupt handler. */ extern void emergency_restart(void); #include <asm/emergency-restart.h> #endif /* _LINUX_REBOOT_H */