projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| caab277b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| cd1aebf5 MR |
2 | /* |
| 3 | * Copyright (C) 2013 ARM Ltd. | |
| cd1aebf5 MR |
4 | */ |
| 5 | #ifndef __ASM_CPU_OPS_H | |
| 6 | #define __ASM_CPU_OPS_H | |
| 7 | ||
| 8 | #include <linux/init.h> | |
| 9 | #include <linux/threads.h> | |
| 10 | ||
| 652af899 MR |
11 | /** |
| 12 | * struct cpu_operations - Callback operations for hotplugging CPUs. | |
| 13 | * | |
| 14 | * @name: Name of the property as appears in a devicetree cpu node's | |
| 819a8826 LP |
15 | * enable-method property. On systems booting with ACPI, @name |
| 16 | * identifies the struct cpu_operations entry corresponding to | |
| 17 | * the boot protocol specified in the ACPI MADT table. | |
| 18 | * @cpu_init: Reads any data necessary for a specific enable-method for a | |
| 19 | * proposed logical id. | |
| 652af899 MR |
20 | * @cpu_prepare: Early one-time preparation step for a cpu. If there is a |
| 21 | * mechanism for doing so, tests whether it is possible to boot | |
| 22 | * the given CPU. | |
| 23 | * @cpu_boot: Boots a cpu into the kernel. | |
| ad14c192 | 24 | * @cpu_postboot: Optionally, perform any post-boot cleanup or necessary |
| 652af899 | 25 | * synchronisation. Called from the cpu being booted. |
| d55c5f28 SH |
26 | * @cpu_can_disable: Determines whether a CPU can be disabled based on |
| 27 | * mechanism-specific information. | |
| 9327e2c6 MR |
28 | * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific |
| 29 | * reason, which will cause the hot unplug to be aborted. Called | |
| 30 | * from the cpu to be killed. | |
| 31 | * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the | |
| 32 | * cpu being killed. | |
| c814ca02 | 33 | * @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu. |
| 652af899 | 34 | */ |
| cd1aebf5 MR |
35 | struct cpu_operations { |
| 36 | const char *name; | |
| 819a8826 | 37 | int (*cpu_init)(unsigned int); |
| cd1aebf5 | 38 | int (*cpu_prepare)(unsigned int); |
| 652af899 MR |
39 | int (*cpu_boot)(unsigned int); |
| 40 | void (*cpu_postboot)(void); | |
| 9327e2c6 | 41 | #ifdef CONFIG_HOTPLUG_CPU |
| d55c5f28 | 42 | bool (*cpu_can_disable)(unsigned int cpu); |
| 9327e2c6 MR |
43 | int (*cpu_disable)(unsigned int cpu); |
| 44 | void (*cpu_die)(unsigned int cpu); | |
| c814ca02 | 45 | int (*cpu_kill)(unsigned int cpu); |
| 9327e2c6 | 46 | #endif |
| cd1aebf5 MR |
47 | }; |
| 48 | ||
| 6885fb12 | 49 | int __init init_cpu_ops(int cpu); |
| de58ed5e | 50 | extern const struct cpu_operations *get_cpu_ops(int cpu); |
| cd1aebf5 | 51 | |
| 6885fb12 | 52 | static inline void __init init_bootcpu_ops(void) |
| 819a8826 | 53 | { |
| 6885fb12 | 54 | init_cpu_ops(0); |
| 819a8826 LP |
55 | } |
| 56 | ||
| cd1aebf5 | 57 | #endif /* ifndef __ASM_CPU_OPS_H */ |