// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/kernel/topology.c
 *
 *  Copyright (C) 2007  Paul Mundt
 */
#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/topology.h>
#include <linux/node.h>
#include <linux/nodemask.h>
#include <linux/export.h>

static DEFINE_PER_CPU(struct cpu, cpu_devices);

cpumask_t cpu_core_map[NR_CPUS];
EXPORT_SYMBOL(cpu_core_map);

static cpumask_t cpu_coregroup_map(int cpu)
{
        /*
         * Presently all SH-X3 SMP cores are multi-cores, so just keep it
         * simple until we have a method for determining topology..
         */
        return *cpu_possible_mask;
}

const struct cpumask *cpu_coregroup_mask(int cpu)
{
        return &cpu_core_map[cpu];
}

int arch_update_cpu_topology(void)
{
        unsigned int cpu;

        for_each_possible_cpu(cpu)
                cpu_core_map[cpu] = cpu_coregroup_map(cpu);

        return 0;
}

static int __init topology_init(void)
{
        int i, ret;

        for_each_present_cpu(i) {
                struct cpu *c = &per_cpu(cpu_devices, i);

                c->hotpluggable = 1;

                ret = register_cpu(c, i);
                if (unlikely(ret))
                        printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
                               __func__, i, ret);
        }

#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
        /*
         * In the UP case, make sure the CPU association is still
         * registered under each node. Without this, sysfs fails
         * to make the connection between nodes other than node0
         * and cpu0.
         */
        for_each_online_node(i)
                if (i != numa_node_id())
                        register_cpu_under_node(raw_smp_processor_id(), i);
#endif

        return 0;
}
subsys_initcall(topology_init);