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