1 /* 2 * Copyright (C) 2002 ARM Ltd. 3 * All Rights Reserved 4 * Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 #include <linux/kernel.h> 11 #include <linux/smp.h> 12 #include <linux/clk/tegra.h> 13 14 #include <asm/smp_plat.h> 15 16 #include "fuse.h" 17 #include "sleep.h" 18 19 static void (*tegra_hotplug_shutdown)(void); 20 21 int tegra_cpu_kill(unsigned cpu) 22 { 23 cpu = cpu_logical_map(cpu); 24 25 /* Clock gate the CPU */ 26 tegra_wait_cpu_in_reset(cpu); 27 tegra_disable_cpu_clock(cpu); 28 29 return 1; 30 } 31 32 /* 33 * platform-specific code to shutdown a CPU 34 * 35 * Called with IRQs disabled 36 */ 37 void __ref tegra_cpu_die(unsigned int cpu) 38 { 39 /* Clean L1 data cache */ 40 tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); 41 42 /* Shut down the current CPU. */ 43 tegra_hotplug_shutdown(); 44 45 /* Should never return here. */ 46 BUG(); 47 } 48 49 void __init tegra_hotplug_init(void) 50 { 51 if (!IS_ENABLED(CONFIG_HOTPLUG_CPU)) 52 return; 53 54 if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_chip_id == TEGRA20) 55 tegra_hotplug_shutdown = tegra20_hotplug_shutdown; 56 if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30) 57 tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 58 if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114) 59 tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 60 } 61