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/*
* Copyright (C) 2002 ARM Ltd.
* All Rights Reserved
* Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk/tegra.h>
#include <linux/kernel.h>
#include <linux/smp.h>
#include <soc/tegra/common.h>
#include <soc/tegra/fuse.h>
#include <asm/smp_plat.h>
#include "sleep.h"
static void (*tegra_hotplug_shutdown)(void);
int tegra_cpu_kill(unsigned cpu)
{
cpu = cpu_logical_map(cpu);
/* Clock gate the CPU */
tegra_wait_cpu_in_reset(cpu);
tegra_disable_cpu_clock(cpu);
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void __ref tegra_cpu_die(unsigned int cpu)
{
if (!tegra_hotplug_shutdown) {
WARN(1, "hotplug is not yet initialized\n");
return;
}
/* Clean L1 data cache */
tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
/* Shut down the current CPU. */
tegra_hotplug_shutdown();
/* Should never return here. */
BUG();
}
static int __init tegra_hotplug_init(void)
{
if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
return 0;
if (!soc_is_tegra())
return 0;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
return 0;
}
pure_initcall(tegra_hotplug_init);
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