platsmp.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * SMP support for R-Mobile / SH-Mobile
 4 *
 5 * Copyright (C) 2010  Magnus Damm
 6 * Copyright (C) 2011  Paul Mundt
 7 *
 8 * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
 9 */
10#include <linux/init.h>
11#include <asm/cacheflush.h>
12#include <asm/smp_plat.h>
13#include "common.h"
14
15extern unsigned long shmobile_smp_fn[];
16extern unsigned long shmobile_smp_arg[];
17extern unsigned long shmobile_smp_mpidr[];
18
19void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg)
20{
21	shmobile_smp_fn[cpu] = 0;
22	flush_cache_all();
23
24	shmobile_smp_mpidr[cpu] = cpu_logical_map(cpu);
25	shmobile_smp_fn[cpu] = fn;
26	shmobile_smp_arg[cpu] = arg;
27	flush_cache_all();
28}
29
30#ifdef CONFIG_HOTPLUG_CPU
31bool shmobile_smp_cpu_can_disable(unsigned int cpu)
32{
33	return true; /* Hotplug of any CPU is supported */
34}
35#endif