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66 lines
2.4 KiB
66 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2013 ARM Ltd. |
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*/ |
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#ifndef __ASM_CPU_OPS_H |
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#define __ASM_CPU_OPS_H |
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#include <linux/init.h> |
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#include <linux/threads.h> |
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/** |
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* struct cpu_operations - Callback operations for hotplugging CPUs. |
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* |
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* @name: Name of the property as appears in a devicetree cpu node's |
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* enable-method property. On systems booting with ACPI, @name |
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* identifies the struct cpu_operations entry corresponding to |
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* the boot protocol specified in the ACPI MADT table. |
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* @cpu_init: Reads any data necessary for a specific enable-method for a |
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* proposed logical id. |
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* @cpu_prepare: Early one-time preparation step for a cpu. If there is a |
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* mechanism for doing so, tests whether it is possible to boot |
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* the given CPU. |
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* @cpu_boot: Boots a cpu into the kernel. |
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* @cpu_postboot: Optionally, perform any post-boot cleanup or necessary |
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* synchronisation. Called from the cpu being booted. |
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* @cpu_can_disable: Determines whether a CPU can be disabled based on |
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* mechanism-specific information. |
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* @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific |
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* reason, which will cause the hot unplug to be aborted. Called |
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* from the cpu to be killed. |
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* @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the |
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* cpu being killed. |
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* @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu. |
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* @cpu_init_idle: Reads any data necessary to initialize CPU idle states for |
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* a proposed logical id. |
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* @cpu_suspend: Suspends a cpu and saves the required context. May fail owing |
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* to wrong parameters or error conditions. Called from the |
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* CPU being suspended. Must be called with IRQs disabled. |
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*/ |
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struct cpu_operations { |
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const char *name; |
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int (*cpu_init)(unsigned int); |
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int (*cpu_prepare)(unsigned int); |
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int (*cpu_boot)(unsigned int); |
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void (*cpu_postboot)(void); |
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#ifdef CONFIG_HOTPLUG_CPU |
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bool (*cpu_can_disable)(unsigned int cpu); |
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int (*cpu_disable)(unsigned int cpu); |
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void (*cpu_die)(unsigned int cpu); |
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int (*cpu_kill)(unsigned int cpu); |
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#endif |
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#ifdef CONFIG_CPU_IDLE |
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int (*cpu_init_idle)(unsigned int); |
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int (*cpu_suspend)(unsigned long); |
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#endif |
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}; |
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int __init init_cpu_ops(int cpu); |
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extern const struct cpu_operations *get_cpu_ops(int cpu); |
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static inline void __init init_bootcpu_ops(void) |
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{ |
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init_cpu_ops(0); |
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} |
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#endif /* ifndef __ASM_CPU_OPS_H */
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