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