// SPDX-License-Identifier: GPL-2.0
/* reboot.c: reboot/shutdown/halt/poweroff handling
 *
 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
 */
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/export.h>
#include <linux/pm.h>
#include <linux/of.h>

#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/setup.h>

/* sysctl - toggle power-off restriction for serial console
 * systems in machine_power_off()
 */
int scons_pwroff = 1;

/* This isn't actually used, it exists merely to satisfy the
 * reference in kernel/sys.c
 */
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);

void machine_power_off(void)
{
        if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
                prom_halt_power_off();

        prom_halt();
}

void machine_halt(void)
{
        prom_halt();
        panic("Halt failed!");
}

void machine_restart(char *cmd)
{
        char *p;

        p = strchr(reboot_command, '\n');
        if (p)
                *p = 0;
        if (cmd)
                prom_reboot(cmd);
        if (*reboot_command)
                prom_reboot(reboot_command);
        prom_reboot("");
        panic("Reboot failed!");
}