11cea7326SColin Cross /* 21cea7326SColin Cross * Copyright (C) 2002 ARM Ltd. 31cea7326SColin Cross * All Rights Reserved 47469688eSHiroshi Doyu * Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved. 51cea7326SColin Cross * 61cea7326SColin Cross * This program is free software; you can redistribute it and/or modify 71cea7326SColin Cross * it under the terms of the GNU General Public License version 2 as 81cea7326SColin Cross * published by the Free Software Foundation. 91cea7326SColin Cross */ 10a0524accSThierry Reding 11a0524accSThierry Reding #include <linux/clk/tegra.h> 121cea7326SColin Cross #include <linux/kernel.h> 131cea7326SColin Cross #include <linux/smp.h> 141cea7326SColin Cross 15*304664eaSThierry Reding #include <soc/tegra/fuse.h> 16*304664eaSThierry Reding 1759b0f682SJoseph Lo #include <asm/smp_plat.h> 181cea7326SColin Cross 1959b0f682SJoseph Lo #include "sleep.h" 201cea7326SColin Cross 2159b0f682SJoseph Lo static void (*tegra_hotplug_shutdown)(void); 221cea7326SColin Cross 23b8119431SJoseph Lo int tegra_cpu_kill(unsigned cpu) 24b8119431SJoseph Lo { 25b8119431SJoseph Lo cpu = cpu_logical_map(cpu); 26b8119431SJoseph Lo 27b8119431SJoseph Lo /* Clock gate the CPU */ 28b8119431SJoseph Lo tegra_wait_cpu_in_reset(cpu); 29b8119431SJoseph Lo tegra_disable_cpu_clock(cpu); 30b8119431SJoseph Lo 31b8119431SJoseph Lo return 1; 32b8119431SJoseph Lo } 33b8119431SJoseph Lo 341cea7326SColin Cross /* 351cea7326SColin Cross * platform-specific code to shutdown a CPU 361cea7326SColin Cross * 371cea7326SColin Cross * Called with IRQs disabled 381cea7326SColin Cross */ 39a1725732SMarc Zyngier void __ref tegra_cpu_die(unsigned int cpu) 401cea7326SColin Cross { 4157886616SJoseph Lo /* Clean L1 data cache */ 42ac2527bfSJoseph Lo tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); 431cea7326SColin Cross 4459b0f682SJoseph Lo /* Shut down the current CPU. */ 4559b0f682SJoseph Lo tegra_hotplug_shutdown(); 46d4450261SRussell King 4759b0f682SJoseph Lo /* Should never return here. */ 4859b0f682SJoseph Lo BUG(); 491cea7326SColin Cross } 501cea7326SColin Cross 517469688eSHiroshi Doyu void __init tegra_hotplug_init(void) 52453689e4SJoseph Lo { 537469688eSHiroshi Doyu if (!IS_ENABLED(CONFIG_HOTPLUG_CPU)) 547469688eSHiroshi Doyu return; 55453689e4SJoseph Lo 56*304664eaSThierry Reding if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20) 577469688eSHiroshi Doyu tegra_hotplug_shutdown = tegra20_hotplug_shutdown; 58*304664eaSThierry Reding if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30) 5959b0f682SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 60*304664eaSThierry Reding if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114) 6133d5c019SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 62*304664eaSThierry Reding if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124) 639997e626SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 6459b0f682SJoseph Lo } 65