1fcaf2036SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 269c31b7aSShawn Guo /* 369c31b7aSShawn Guo * Copyright 2011 Freescale Semiconductor, Inc. 469c31b7aSShawn Guo * Copyright 2011 Linaro Ltd. 569c31b7aSShawn Guo */ 669c31b7aSShawn Guo 769c31b7aSShawn Guo #include <linux/errno.h> 8009e63f8SShawn Guo #include <linux/jiffies.h> 9d7eb28d2SStefan Agner #include <asm/cacheflush.h> 10602bf409SShawn Guo #include <asm/cp15.h> 11009e63f8SShawn Guo #include <asm/proc-fns.h> 12e3372474SShawn Guo 13e3372474SShawn Guo #include "common.h" 14*e34645f4SAnson Huang #include "hardware.h" 1569c31b7aSShawn Guo 1669c31b7aSShawn Guo /* 1769c31b7aSShawn Guo * platform-specific code to shutdown a CPU 1869c31b7aSShawn Guo * 1969c31b7aSShawn Guo * Called with IRQs disabled 2069c31b7aSShawn Guo */ imx_cpu_die(unsigned int cpu)21e4f2d979SMarc Zyngiervoid imx_cpu_die(unsigned int cpu) 2269c31b7aSShawn Guo { 23d7eb28d2SStefan Agner v7_exit_coherency_flush(louis); 242f3edfd7SShawn Guo /* 252f3edfd7SShawn Guo * We use the cpu jumping argument register to sync with 262f3edfd7SShawn Guo * imx_cpu_kill() which is running on cpu0 and waiting for 272f3edfd7SShawn Guo * the register being cleared to kill the cpu. 282f3edfd7SShawn Guo */ 292f3edfd7SShawn Guo imx_set_cpu_arg(cpu, ~0); 30fcd75f92SShawn Guo 31fcd75f92SShawn Guo while (1) 3283757664SShawn Guo cpu_do_idle(); 3383757664SShawn Guo } 3469c31b7aSShawn Guo imx_cpu_kill(unsigned int cpu)3583757664SShawn Guoint imx_cpu_kill(unsigned int cpu) 3683757664SShawn Guo { 372f3edfd7SShawn Guo unsigned long timeout = jiffies + msecs_to_jiffies(50); 382f3edfd7SShawn Guo 392f3edfd7SShawn Guo while (imx_get_cpu_arg(cpu) == 0) 402f3edfd7SShawn Guo if (time_after(jiffies, timeout)) 412f3edfd7SShawn Guo return 0; 4283757664SShawn Guo imx_enable_cpu(cpu, false); 432f3edfd7SShawn Guo imx_set_cpu_arg(cpu, 0); 44*e34645f4SAnson Huang if (cpu_is_imx7d()) 45*e34645f4SAnson Huang imx_gpcv2_set_core1_pdn_pup_by_software(true); 4683757664SShawn Guo return 1; 4769c31b7aSShawn Guo } 48