/* * 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 "common.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 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);