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The kernel has orderly_poweroff which allows the kernel to initiate a graceful shutdown of userspace, by running /sbin/poweroff. This adds orderly_reboot that will cause userspace to shut itself down by calling /sbin/reboot. This will be used for shutdown initiated by a system controller on platforms that do not use ACPI. orderly_reboot() should be used when the system wants to allow userspace to gracefully shut itself down. For cases where the system may imminently catch on fire, the existing emergency_restart() provides an immediate reboot without involving userspace. Signed-off-by: Joel Stanley <joel@jms.id.au> Cc: Fabian Frederick <fabf@skynet.be> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Kerr <jk@ozlabs.org> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
#ifndef _LINUX_REBOOT_H
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#define _LINUX_REBOOT_H
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#include <linux/notifier.h>
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#include <uapi/linux/reboot.h>
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#define SYS_DOWN 0x0001 /* Notify of system down */
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#define SYS_RESTART SYS_DOWN
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#define SYS_HALT 0x0002 /* Notify of system halt */
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#define SYS_POWER_OFF 0x0003 /* Notify of system power off */
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enum reboot_mode {
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REBOOT_COLD = 0,
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REBOOT_WARM,
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REBOOT_HARD,
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REBOOT_SOFT,
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REBOOT_GPIO,
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};
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extern enum reboot_mode reboot_mode;
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enum reboot_type {
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BOOT_TRIPLE = 't',
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BOOT_KBD = 'k',
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BOOT_BIOS = 'b',
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BOOT_ACPI = 'a',
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BOOT_EFI = 'e',
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BOOT_CF9_FORCE = 'p',
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BOOT_CF9_SAFE = 'q',
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};
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extern enum reboot_type reboot_type;
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extern int reboot_default;
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extern int reboot_cpu;
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extern int reboot_force;
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extern int register_reboot_notifier(struct notifier_block *);
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extern int unregister_reboot_notifier(struct notifier_block *);
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extern int register_restart_handler(struct notifier_block *);
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extern int unregister_restart_handler(struct notifier_block *);
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extern void do_kernel_restart(char *cmd);
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/*
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* Architecture-specific implementations of sys_reboot commands.
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*/
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extern void migrate_to_reboot_cpu(void);
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extern void machine_restart(char *cmd);
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extern void machine_halt(void);
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extern void machine_power_off(void);
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extern void machine_shutdown(void);
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struct pt_regs;
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extern void machine_crash_shutdown(struct pt_regs *);
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/*
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* Architecture independent implemenations of sys_reboot commands.
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*/
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extern void kernel_restart_prepare(char *cmd);
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extern void kernel_restart(char *cmd);
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extern void kernel_halt(void);
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extern void kernel_power_off(void);
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extern int C_A_D; /* for sysctl */
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void ctrl_alt_del(void);
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#define POWEROFF_CMD_PATH_LEN 256
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extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
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extern void orderly_poweroff(bool force);
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extern void orderly_reboot(void);
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/*
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* Emergency restart, callable from an interrupt handler.
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*/
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extern void emergency_restart(void);
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#include <asm/emergency-restart.h>
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#endif /* _LINUX_REBOOT_H */
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