// SPDX-License-Identifier: GPL-2.0
#include <linux/pm.h>
#include <linux/kexec.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/module.h>
#include <asm/watchdog.h>
#include <asm/addrspace.h>
#include <asm/reboot.h>
#include <asm/tlbflush.h>
#include <asm/traps.h>

void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);

static void watchdog_trigger_immediate(void)
{
        sh_wdt_write_cnt(0xFF);
        sh_wdt_write_csr(0xC2);
}

static void native_machine_restart(char * __unused)
{
        local_irq_disable();

        /* Destroy all of the TLBs in preparation for reset by MMU */
        __flush_tlb_global();

        /* Address error with SR.BL=1 first. */
        trigger_address_error();

        /* If that fails or is unsupported, go for the watchdog next. */
        watchdog_trigger_immediate();

        /*
         * Give up and sleep.
         */
        while (1)
                cpu_sleep();
}

static void native_machine_shutdown(void)
{
        smp_send_stop();
}

static void native_machine_power_off(void)
{
        do_kernel_power_off();
}

static void native_machine_halt(void)
{
        /* stop other cpus */
        machine_shutdown();

        /* stop this cpu */
        stop_this_cpu(NULL);
}

struct machine_ops machine_ops = {
        .power_off      = native_machine_power_off,
        .shutdown       = native_machine_shutdown,
        .restart        = native_machine_restart,
        .halt           = native_machine_halt,
#ifdef CONFIG_KEXEC_CORE
        .crash_shutdown = native_machine_crash_shutdown,
#endif
};

void machine_power_off(void)
{
        machine_ops.power_off();
}

void machine_shutdown(void)
{
        machine_ops.shutdown();
}

void machine_restart(char *cmd)
{
        machine_ops.restart(cmd);
}

void machine_halt(void)
{
        machine_ops.halt();
}

#ifdef CONFIG_KEXEC_CORE
void machine_crash_shutdown(struct pt_regs *regs)
{
        machine_ops.crash_shutdown(regs);
}
#endif