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74 lines
1.7 KiB
74 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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#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 "common.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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