projects / thirdparty / linux.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. | |
| 24 | * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary | |
| 25 | * synchronisation. Called from the cpu being booted. | |
| 9327e2c6 MR |
26 | * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific |
| 27 | * reason, which will cause the hot unplug to be aborted. Called | |
| 28 | * from the cpu to be killed. | |
| 29 | * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the | |
| 30 | * cpu being killed. | |
| c814ca02 | 31 | * @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu. |
| 819a8826 LP |
32 | * @cpu_init_idle: Reads any data necessary to initialize CPU idle states for |
| 33 | * a proposed logical id. | |
| 95322526 LP |
34 | * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing |
| 35 | * to wrong parameters or error conditions. Called from the | |
| 36 | * CPU being suspended. Must be called with IRQs disabled. | |
| 652af899 | 37 | */ |
| cd1aebf5 MR |
38 | struct cpu_operations { |
| 39 | const char *name; | |
| 819a8826 | 40 | int (*cpu_init)(unsigned int); |
| cd1aebf5 | 41 | int (*cpu_prepare)(unsigned int); |
| 652af899 MR |
42 | int (*cpu_boot)(unsigned int); |
| 43 | void (*cpu_postboot)(void); | |
| 9327e2c6 MR |
44 | #ifdef CONFIG_HOTPLUG_CPU |
| 45 | int (*cpu_disable)(unsigned int cpu); | |
| 46 | void (*cpu_die)(unsigned int cpu); | |
| c814ca02 | 47 | int (*cpu_kill)(unsigned int cpu); |
| 9327e2c6 | 48 | #endif |
| af3cfdbf | 49 | #ifdef CONFIG_CPU_IDLE |
| 819a8826 | 50 | int (*cpu_init_idle)(unsigned int); |
| 95322526 LP |
51 | int (*cpu_suspend)(unsigned long); |
| 52 | #endif | |
| cd1aebf5 MR |
53 | }; |
| 54 | ||
| 55 | extern const struct cpu_operations *cpu_ops[NR_CPUS]; | |
| 819a8826 | 56 | int __init cpu_read_ops(int cpu); |
| cd1aebf5 | 57 | |
| 819a8826 LP |
58 | static inline void __init cpu_read_bootcpu_ops(void) |
| 59 | { | |
| 60 | cpu_read_ops(0); | |
| 61 | } | |
| 62 | ||
| cd1aebf5 | 63 | #endif /* ifndef __ASM_CPU_OPS_H */ |