2 * arch/sh/kernel/topology.c
4 * Copyright (C) 2007 Paul Mundt
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
10 #include <linux/cpu.h>
11 #include <linux/cpumask.h>
12 #include <linux/init.h>
13 #include <linux/percpu.h>
14 #include <linux/topology.h>
15 #include <linux/node.h>
16 #include <linux/nodemask.h>
17 #include <linux/export.h>
19 static DEFINE_PER_CPU(struct cpu, cpu_devices);
21 cpumask_t cpu_core_map[NR_CPUS];
22 EXPORT_SYMBOL(cpu_core_map);
24 static cpumask_t cpu_coregroup_map(int cpu)
27 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
28 * simple until we have a method for determining topology..
30 return *cpu_possible_mask;
33 const struct cpumask *cpu_coregroup_mask(int cpu)
35 return &cpu_core_map[cpu];
38 int arch_update_cpu_topology(void)
42 for_each_possible_cpu(cpu)
43 cpu_core_map[cpu] = cpu_coregroup_map(cpu);
48 static int __init topology_init(void)
52 #ifdef CONFIG_NEED_MULTIPLE_NODES
53 for_each_online_node(i)
57 for_each_present_cpu(i) {
58 struct cpu *c = &per_cpu(cpu_devices, i);
62 ret = register_cpu(c, i);
64 printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
68 #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
70 * In the UP case, make sure the CPU association is still
71 * registered under each node. Without this, sysfs fails
72 * to make the connection between nodes other than node0
75 for_each_online_node(i)
76 if (i != numa_node_id())
77 register_cpu_under_node(raw_smp_processor_id(), i);
82 subsys_initcall(topology_init);