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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. | |
c814ca02 | 42 | * @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu. |
af3cfdbf LP |
43 | * @cpu_init_idle: Reads any data necessary to initialize CPU idle states from |
44 | * devicetree, for a given cpu node and proposed logical id. | |
95322526 LP |
45 | * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing |
46 | * to wrong parameters or error conditions. Called from the | |
47 | * CPU being suspended. Must be called with IRQs disabled. | |
652af899 | 48 | */ |
cd1aebf5 MR |
49 | struct cpu_operations { |
50 | const char *name; | |
51 | int (*cpu_init)(struct device_node *, unsigned int); | |
52 | int (*cpu_prepare)(unsigned int); | |
652af899 MR |
53 | int (*cpu_boot)(unsigned int); |
54 | void (*cpu_postboot)(void); | |
9327e2c6 MR |
55 | #ifdef CONFIG_HOTPLUG_CPU |
56 | int (*cpu_disable)(unsigned int cpu); | |
57 | void (*cpu_die)(unsigned int cpu); | |
c814ca02 | 58 | int (*cpu_kill)(unsigned int cpu); |
9327e2c6 | 59 | #endif |
af3cfdbf LP |
60 | #ifdef CONFIG_CPU_IDLE |
61 | int (*cpu_init_idle)(struct device_node *, unsigned int); | |
95322526 LP |
62 | int (*cpu_suspend)(unsigned long); |
63 | #endif | |
cd1aebf5 MR |
64 | }; |
65 | ||
66 | extern const struct cpu_operations *cpu_ops[NR_CPUS]; | |
0a6479b0 GL |
67 | int __init cpu_read_ops(struct device_node *dn, int cpu); |
68 | void __init cpu_read_bootcpu_ops(void); | |
fccb9a81 | 69 | const struct cpu_operations *cpu_get_ops(const char *name); |
cd1aebf5 MR |
70 | |
71 | #endif /* ifndef __ASM_CPU_OPS_H */ |