projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cd1aebf5 MR |
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 | ||
| 652af899 MR |
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. | |
| 31 | * @cpu_prepare: Early one-time preparation step for a cpu. If there is a | |
| 32 | * mechanism for doing so, tests whether it is possible to boot | |
| 33 | * the given CPU. | |
| 34 | * @cpu_boot: Boots a cpu into the kernel. | |
| 35 | * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary | |
| 36 | * synchronisation. Called from the cpu being booted. | |
| 9327e2c6 MR |
37 | * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific |
| 38 | * reason, which will cause the hot unplug to be aborted. Called | |
| 39 | * from the cpu to be killed. | |
| 40 | * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the | |
| 41 | * cpu being killed. | |
| 95322526 LP |
42 | * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing |
| 43 | * to wrong parameters or error conditions. Called from the | |
| 44 | * CPU being suspended. Must be called with IRQs disabled. | |
| 652af899 | 45 | */ |
| cd1aebf5 MR |
46 | struct cpu_operations { |
| 47 | const char *name; | |
| 48 | int (*cpu_init)(struct device_node *, unsigned int); | |
| 49 | int (*cpu_prepare)(unsigned int); | |
| 652af899 MR |
50 | int (*cpu_boot)(unsigned int); |
| 51 | void (*cpu_postboot)(void); | |
| 9327e2c6 MR |
52 | #ifdef CONFIG_HOTPLUG_CPU |
| 53 | int (*cpu_disable)(unsigned int cpu); | |
| 54 | void (*cpu_die)(unsigned int cpu); | |
| 55 | #endif | |
| 95322526 LP |
56 | #ifdef CONFIG_ARM64_CPU_SUSPEND |
| 57 | int (*cpu_suspend)(unsigned long); | |
| 58 | #endif | |
| cd1aebf5 MR |
59 | }; |
| 60 | ||
| 61 | extern const struct cpu_operations *cpu_ops[NR_CPUS]; | |
| e8765b26 MR |
62 | extern int __init cpu_read_ops(struct device_node *dn, int cpu); |
| 63 | extern void __init cpu_read_bootcpu_ops(void); | |
| cd1aebf5 MR |
64 | |
| 65 | #endif /* ifndef __ASM_CPU_OPS_H */ |