1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2002 ARM Ltd. 4*4882a593Smuzhiyun * All Rights Reserved 5*4882a593Smuzhiyun * Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <linux/clk/tegra.h> 9*4882a593Smuzhiyun #include <linux/kernel.h> 10*4882a593Smuzhiyun #include <linux/smp.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <soc/tegra/common.h> 13*4882a593Smuzhiyun #include <soc/tegra/fuse.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <asm/smp_plat.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #include "common.h" 18*4882a593Smuzhiyun #include "sleep.h" 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun static void (*tegra_hotplug_shutdown)(void); 21*4882a593Smuzhiyun tegra_cpu_kill(unsigned cpu)22*4882a593Smuzhiyunint tegra_cpu_kill(unsigned cpu) 23*4882a593Smuzhiyun { 24*4882a593Smuzhiyun cpu = cpu_logical_map(cpu); 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /* Clock gate the CPU */ 27*4882a593Smuzhiyun tegra_wait_cpu_in_reset(cpu); 28*4882a593Smuzhiyun tegra_disable_cpu_clock(cpu); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun return 1; 31*4882a593Smuzhiyun } 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* 34*4882a593Smuzhiyun * platform-specific code to shutdown a CPU 35*4882a593Smuzhiyun * 36*4882a593Smuzhiyun * Called with IRQs disabled 37*4882a593Smuzhiyun */ tegra_cpu_die(unsigned int cpu)38*4882a593Smuzhiyunvoid tegra_cpu_die(unsigned int cpu) 39*4882a593Smuzhiyun { 40*4882a593Smuzhiyun if (!tegra_hotplug_shutdown) { 41*4882a593Smuzhiyun WARN(1, "hotplug is not yet initialized\n"); 42*4882a593Smuzhiyun return; 43*4882a593Smuzhiyun } 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun /* Clean L1 data cache */ 46*4882a593Smuzhiyun tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* Shut down the current CPU. */ 49*4882a593Smuzhiyun tegra_hotplug_shutdown(); 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun /* Should never return here. */ 52*4882a593Smuzhiyun BUG(); 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun tegra_hotplug_init(void)55*4882a593Smuzhiyunstatic int __init tegra_hotplug_init(void) 56*4882a593Smuzhiyun { 57*4882a593Smuzhiyun if (!IS_ENABLED(CONFIG_HOTPLUG_CPU)) 58*4882a593Smuzhiyun return 0; 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun if (!soc_is_tegra()) 61*4882a593Smuzhiyun return 0; 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20) 64*4882a593Smuzhiyun tegra_hotplug_shutdown = tegra20_hotplug_shutdown; 65*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30) 66*4882a593Smuzhiyun tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 67*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114) 68*4882a593Smuzhiyun tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 69*4882a593Smuzhiyun if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124) 70*4882a593Smuzhiyun tegra_hotplug_shutdown = tegra30_hotplug_shutdown; 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun return 0; 73*4882a593Smuzhiyun } 74*4882a593Smuzhiyun pure_initcall(tegra_hotplug_init); 75