47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
|
|
* Based on arch/arm64/include/asm/cpu_ops.h
|
|
*/
|
|
#ifndef __ASM_CPU_OPS_H
|
|
#define __ASM_CPU_OPS_H
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/threads.h>
|
|
|
|
/**
|
|
* struct cpu_operations - Callback operations for hotplugging CPUs.
|
|
*
|
|
* @name: Name of the boot protocol.
|
|
* @cpu_prepare: Early one-time preparation step for a cpu. If there
|
|
* is a mechanism for doing so, tests whether it is
|
|
* possible to boot the given HART.
|
|
* @cpu_start: Boots a cpu into the kernel.
|
|
* @cpu_disable: Prepares a cpu to die. May fail for some
|
|
* mechanism-specific reason, which will cause the hot
|
|
* unplug to be aborted. Called from the cpu to be killed.
|
|
* @cpu_stop: Makes a cpu leave the kernel. Must not fail. Called from
|
|
* the cpu being stopped.
|
|
* @cpu_is_stopped: Ensures a cpu has left the kernel. Called from another
|
|
* cpu.
|
|
*/
|
|
struct cpu_operations {
|
|
const char *name;
|
|
int (*cpu_prepare)(unsigned int cpu);
|
|
int (*cpu_start)(unsigned int cpu,
|
|
struct task_struct *tidle);
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
int (*cpu_disable)(unsigned int cpu);
|
|
void (*cpu_stop)(void);
|
|
int (*cpu_is_stopped)(unsigned int cpu);
|
|
#endif
|
|
};
|
|
|
|
extern const struct cpu_operations *cpu_ops[NR_CPUS];
|
|
void __init cpu_set_ops(int cpu);
|
|
void cpu_update_secondary_bootdata(unsigned int cpuid,
|
|
struct task_struct *tidle);
|
|
|
|
#endif /* ifndef __ASM_CPU_OPS_H */
|