1 cd1aebf5SMark Rutland /* 2 cd1aebf5SMark Rutland * Copyright (C) 2013 ARM Ltd. 3 cd1aebf5SMark Rutland * 4 cd1aebf5SMark Rutland * This program is free software; you can redistribute it and/or modify 5 cd1aebf5SMark Rutland * it under the terms of the GNU General Public License version 2 as 6 cd1aebf5SMark Rutland * published by the Free Software Foundation. 7 cd1aebf5SMark Rutland * 8 cd1aebf5SMark Rutland * This program is distributed in the hope that it will be useful, 9 cd1aebf5SMark Rutland * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 cd1aebf5SMark Rutland * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 cd1aebf5SMark Rutland * GNU General Public License for more details. 12 cd1aebf5SMark Rutland * 13 cd1aebf5SMark Rutland * You should have received a copy of the GNU General Public License 14 cd1aebf5SMark Rutland * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 cd1aebf5SMark Rutland */ 16 cd1aebf5SMark Rutland #ifndef __ASM_CPU_OPS_H 17 cd1aebf5SMark Rutland #define __ASM_CPU_OPS_H 18 cd1aebf5SMark Rutland 19 cd1aebf5SMark Rutland #include <linux/init.h> 20 cd1aebf5SMark Rutland #include <linux/threads.h> 21 cd1aebf5SMark Rutland 22 cd1aebf5SMark Rutland struct device_node; 23 cd1aebf5SMark Rutland 24 652af899SMark Rutland /** 25 652af899SMark Rutland * struct cpu_operations - Callback operations for hotplugging CPUs. 26 652af899SMark Rutland * 27 652af899SMark Rutland * @name: Name of the property as appears in a devicetree cpu node's 28 652af899SMark Rutland * enable-method property. 29 652af899SMark Rutland * @cpu_init: Reads any data necessary for a specific enable-method from the 30 652af899SMark Rutland * devicetree, for a given cpu node and proposed logical id. 31 652af899SMark Rutland * @cpu_prepare: Early one-time preparation step for a cpu. If there is a 32 652af899SMark Rutland * mechanism for doing so, tests whether it is possible to boot 33 652af899SMark Rutland * the given CPU. 34 652af899SMark Rutland * @cpu_boot: Boots a cpu into the kernel. 35 652af899SMark Rutland * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary 36 652af899SMark Rutland * synchronisation. Called from the cpu being booted. 37 9327e2c6SMark Rutland * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific 38 9327e2c6SMark Rutland * reason, which will cause the hot unplug to be aborted. Called 39 9327e2c6SMark Rutland * from the cpu to be killed. 40 9327e2c6SMark Rutland * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the 41 9327e2c6SMark Rutland * cpu being killed. 42 *95322526SLorenzo Pieralisi * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing 43 *95322526SLorenzo Pieralisi * to wrong parameters or error conditions. Called from the 44 *95322526SLorenzo Pieralisi * CPU being suspended. Must be called with IRQs disabled. 45 652af899SMark Rutland */ 46 cd1aebf5SMark Rutland struct cpu_operations { 47 cd1aebf5SMark Rutland const char *name; 48 cd1aebf5SMark Rutland int (*cpu_init)(struct device_node *, unsigned int); 49 cd1aebf5SMark Rutland int (*cpu_prepare)(unsigned int); 50 652af899SMark Rutland int (*cpu_boot)(unsigned int); 51 652af899SMark Rutland void (*cpu_postboot)(void); 52 9327e2c6SMark Rutland #ifdef CONFIG_HOTPLUG_CPU 53 9327e2c6SMark Rutland int (*cpu_disable)(unsigned int cpu); 54 9327e2c6SMark Rutland void (*cpu_die)(unsigned int cpu); 55 9327e2c6SMark Rutland #endif 56 *95322526SLorenzo Pieralisi #ifdef CONFIG_ARM64_CPU_SUSPEND 57 *95322526SLorenzo Pieralisi int (*cpu_suspend)(unsigned long); 58 *95322526SLorenzo Pieralisi #endif 59 cd1aebf5SMark Rutland }; 60 cd1aebf5SMark Rutland 61 cd1aebf5SMark Rutland extern const struct cpu_operations *cpu_ops[NR_CPUS]; 62 e8765b26SMark Rutland extern int __init cpu_read_ops(struct device_node *dn, int cpu); 63 e8765b26SMark Rutland extern void __init cpu_read_bootcpu_ops(void); 64 cd1aebf5SMark Rutland 65 cd1aebf5SMark Rutland #endif /* ifndef __ASM_CPU_OPS_H */ 66