https://github.com/torvalds/linux
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Tip revision: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 authored by Linus Torvalds on 09 July 2023, 20:53:13 UTC
Linux 6.5-rc1
Tip revision: 06c2afb
platsmp.c
// SPDX-License-Identifier: GPL-2.0
/*
 * SMP support for R-Mobile / SH-Mobile
 *
 * Copyright (C) 2010  Magnus Damm
 * Copyright (C) 2011  Paul Mundt
 *
 * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
 */
#include <linux/init.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "common.h"

extern unsigned long shmobile_smp_fn[];
extern unsigned long shmobile_smp_arg[];
extern unsigned long shmobile_smp_mpidr[];

void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg)
{
	shmobile_smp_fn[cpu] = 0;
	flush_cache_all();

	shmobile_smp_mpidr[cpu] = cpu_logical_map(cpu);
	shmobile_smp_fn[cpu] = fn;
	shmobile_smp_arg[cpu] = arg;
	flush_cache_all();
}

#ifdef CONFIG_HOTPLUG_CPU
bool shmobile_smp_cpu_can_disable(unsigned int cpu)
{
	return true; /* Hotplug of any CPU is supported */
}
#endif
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