// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/sh/kernel/topology.c
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*
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* Copyright (C) 2007 Paul Mundt
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*/
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#include <linux/cpu.h>
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <linux/percpu.h>
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#include <linux/topology.h>
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#include <linux/node.h>
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#include <linux/nodemask.h>
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#include <linux/export.h>
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static DEFINE_PER_CPU(struct cpu, cpu_devices);
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cpumask_t cpu_core_map[NR_CPUS];
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EXPORT_SYMBOL(cpu_core_map);
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static cpumask_t cpu_coregroup_map(int cpu)
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{
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/*
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* Presently all SH-X3 SMP cores are multi-cores, so just keep it
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* simple until we have a method for determining topology..
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*/
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return *cpu_possible_mask;
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}
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const struct cpumask *cpu_coregroup_mask(int cpu)
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{
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return &cpu_core_map[cpu];
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}
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int arch_update_cpu_topology(void)
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{
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unsigned int cpu;
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for_each_possible_cpu(cpu)
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cpu_core_map[cpu] = cpu_coregroup_map(cpu);
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return 0;
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}
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static int __init topology_init(void)
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{
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int i, ret;
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#ifdef CONFIG_NEED_MULTIPLE_NODES
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for_each_online_node(i)
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register_one_node(i);
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#endif
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for_each_present_cpu(i) {
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struct cpu *c = &per_cpu(cpu_devices, i);
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c->hotpluggable = 1;
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ret = register_cpu(c, i);
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if (unlikely(ret))
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printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
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__func__, i, ret);
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}
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#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
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/*
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* In the UP case, make sure the CPU association is still
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* registered under each node. Without this, sysfs fails
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* to make the connection between nodes other than node0
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* and cpu0.
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*/
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for_each_online_node(i)
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if (i != numa_node_id())
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register_cpu_under_node(raw_smp_processor_id(), i);
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#endif
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return 0;
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}
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subsys_initcall(topology_init);
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