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 */ 10*a0524accSThierry Reding 11*a0524accSThierry Reding #include <linux/clk/tegra.h> 121cea7326SColin Cross #include <linux/kernel.h> 131cea7326SColin Cross #include <linux/smp.h> 141cea7326SColin Cross 1559b0f682SJoseph Lo #include <asm/smp_plat.h> 161cea7326SColin Cross 177469688eSHiroshi Doyu #include "fuse.h" 1859b0f682SJoseph Lo #include "sleep.h" 191cea7326SColin Cross 2059b0f682SJoseph Lo static void (*tegra_hotplug_shutdown)(void); 211cea7326SColin Cross 22b8119431SJoseph Lo int tegra_cpu_kill(unsigned cpu) 23b8119431SJoseph Lo { 24b8119431SJoseph Lo cpu = cpu_logical_map(cpu); 25b8119431SJoseph Lo 26b8119431SJoseph Lo /* Clock gate the CPU */ 27b8119431SJoseph Lo tegra_wait_cpu_in_reset(cpu); 28b8119431SJoseph Lo tegra_disable_cpu_clock(cpu); 29b8119431SJoseph Lo 30b8119431SJoseph Lo return 1; 31b8119431SJoseph Lo } 32b8119431SJoseph Lo 331cea7326SColin Cross /* 341cea7326SColin Cross * platform-specific code to shutdown a CPU 351cea7326SColin Cross * 361cea7326SColin Cross * Called with IRQs disabled 371cea7326SColin Cross */ 38a1725732SMarc Zyngier void __ref tegra_cpu_die(unsigned int cpu) 391cea7326SColin Cross { 4057886616SJoseph Lo /* Clean L1 data cache */ 41ac2527bfSJoseph Lo tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); 421cea7326SColin Cross 4359b0f682SJoseph Lo /* Shut down the current CPU. */ 4459b0f682SJoseph Lo tegra_hotplug_shutdown(); 45d4450261SRussell King 4659b0f682SJoseph Lo /* Should never return here. */ 4759b0f682SJoseph Lo BUG(); 481cea7326SColin Cross } 491cea7326SColin Cross 507469688eSHiroshi Doyu void __init tegra_hotplug_init(void) 51453689e4SJoseph Lo { 527469688eSHiroshi Doyu if (!IS_ENABLED(CONFIG_HOTPLUG_CPU)) 537469688eSHiroshi Doyu return; 54453689e4SJoseph Lo 557469688eSHiroshi Doyu if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_chip_id == TEGRA20) 567469688eSHiroshi Doyu tegra_hotplug_shutdown = tegra20_hotplug_shutdown; 577469688eSHiroshi Doyu if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30) 5859b0f682SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 5933d5c019SJoseph Lo if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114) 6033d5c019SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 619997e626SJoseph Lo if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_chip_id == TEGRA124) 629997e626SJoseph Lo tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 6359b0f682SJoseph Lo } 64