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/*
*
* Copyright (C) 2002 ARM Ltd.
* All Rights Reserved
* Copyright (c) 2010, 2012 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/kernel.h>
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "sleep.h"
#include "tegra_cpu_car.h"
static void (*tegra_hotplug_shutdown)(void);
int platform_cpu_kill(unsigned int cpu)
{
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void platform_cpu_die(unsigned int cpu)
{
cpu = cpu_logical_map(cpu);
/* Flush the L1 data cache. */
flush_cache_all();
/* Shut down the current CPU. */
tegra_hotplug_shutdown();
/* Clock gate the CPU */
tegra_wait_cpu_in_reset(cpu);
tegra_disable_cpu_clock(cpu);
/* Should never return here. */
BUG();
}
int platform_cpu_disable(unsigned int cpu)
{
/*
* we don't allow CPU 0 to be shutdown (it is still too special
* e.g. clock tick interrupts)
*/
return cpu == 0 ? -EPERM : 0;
}
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
extern void tegra20_hotplug_shutdown(void);
void __init tegra20_hotplug_init(void)
{
tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
}
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
extern void tegra30_hotplug_shutdown(void);
void __init tegra30_hotplug_init(void)
{
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
}
#endif
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