// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2011 Freescale Semiconductor, Inc.
 * Copyright 2011 Linaro Ltd.
 */

#include <linux/errno.h>
#include <linux/jiffies.h>
#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include <asm/proc-fns.h>

#include "common.h"
#include "hardware.h"

/*
 * platform-specific code to shutdown a CPU
 *
 * Called with IRQs disabled
 */
void imx_cpu_die(unsigned int cpu)
{
        v7_exit_coherency_flush(louis);
        /*
         * We use the cpu jumping argument register to sync with
         * imx_cpu_kill() which is running on cpu0 and waiting for
         * the register being cleared to kill the cpu.
         */
        imx_set_cpu_arg(cpu, ~0);

        while (1)
                cpu_do_idle();
}

int imx_cpu_kill(unsigned int cpu)
{
        unsigned long timeout = jiffies + msecs_to_jiffies(50);

        while (imx_get_cpu_arg(cpu) == 0)
                if (time_after(jiffies, timeout))
                        return 0;
        imx_enable_cpu(cpu, false);
        imx_set_cpu_arg(cpu, 0);
        if (cpu_is_imx7d())
                imx_gpcv2_set_core1_pdn_pup_by_software(true);
        return 1;
}