| Mark Rutland | eee896b4a | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 ARM Ltd. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | */ |
| 16 | #ifndef __ASM_CPU_OPS_H |
| 17 | #define __ASM_CPU_OPS_H |
| 18 | |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/threads.h> |
| 21 | |
| 22 | struct device_node; |
| 23 | |
| Mark Rutland | 92201a6 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 24 | /** |
| 25 | * struct cpu_operations - Callback operations for hotplugging CPUs. |
| 26 | * |
| 27 | * @name: Name of the property as appears in a devicetree cpu node's |
| 28 | * enable-method property. |
| 29 | * @cpu_init: Reads any data necessary for a specific enable-method from the |
| 30 | * devicetree, for a given cpu node and proposed logical id. |
| Lorenzo Pieralisi | 29b3c03 | 2014-07-17 10:30:07 +0100 | [diff] [blame^] | 31 | * @cpu_init_idle: Reads any data necessary to initialize CPU idle states from |
| 32 | * devicetree, for a given cpu node and proposed logical id. |
| Mark Rutland | 92201a6 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 33 | * @cpu_prepare: Early one-time preparation step for a cpu. If there is a |
| 34 | * mechanism for doing so, tests whether it is possible to boot |
| 35 | * the given CPU. |
| 36 | * @cpu_boot: Boots a cpu into the kernel. |
| 37 | * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary |
| 38 | * synchronisation. Called from the cpu being booted. |
| Mark Rutland | d3bde2d | 2013-10-24 20:30:18 +0100 | [diff] [blame] | 39 | * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific |
| 40 | * reason, which will cause the hot unplug to be aborted. Called |
| 41 | * from the cpu to be killed. |
| 42 | * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the |
| 43 | * cpu being killed. |
| Mark Rutland | 92201a6 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 44 | */ |
| Mark Rutland | eee896b4a | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 45 | struct cpu_operations { |
| 46 | const char *name; |
| 47 | int (*cpu_init)(struct device_node *, unsigned int); |
| Lorenzo Pieralisi | 29b3c03 | 2014-07-17 10:30:07 +0100 | [diff] [blame^] | 48 | int (*cpu_init_idle)(struct device_node *, unsigned int); |
| Mark Rutland | eee896b4a | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 49 | int (*cpu_prepare)(unsigned int); |
| Mark Rutland | 92201a6 | 2013-10-24 20:30:16 +0100 | [diff] [blame] | 50 | int (*cpu_boot)(unsigned int); |
| 51 | void (*cpu_postboot)(void); |
| Mark Rutland | d3bde2d | 2013-10-24 20:30:18 +0100 | [diff] [blame] | 52 | #ifdef CONFIG_HOTPLUG_CPU |
| 53 | int (*cpu_disable)(unsigned int cpu); |
| 54 | void (*cpu_die)(unsigned int cpu); |
| 55 | #endif |
| Mark Rutland | eee896b4a | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | extern const struct cpu_operations *cpu_ops[NR_CPUS]; |
| Mark Rutland | 5ad709f | 2013-10-24 20:30:17 +0100 | [diff] [blame] | 59 | extern int __init cpu_read_ops(struct device_node *dn, int cpu); |
| 60 | extern void __init cpu_read_bootcpu_ops(void); |
| Mark Rutland | eee896b4a | 2013-10-24 20:30:15 +0100 | [diff] [blame] | 61 | |
| 62 | #endif /* ifndef __ASM_CPU_OPS_H */ |