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/node.h>
15 #include <linux/nodemask.h>
17 static DEFINE_PER_CPU(struct cpu, cpu_devices);
19 cpumask_t cpu_core_map[NR_CPUS];
20 EXPORT_SYMBOL(cpu_core_map);
22 static cpumask_t cpu_coregroup_map(unsigned int cpu)
25 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
26 * simple until we have a method for determining topology..
28 return cpu_possible_map;
31 const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
33 return &cpu_core_map[cpu];
36 int arch_update_cpu_topology(void)
40 for_each_possible_cpu(cpu)
41 cpu_core_map[cpu] = cpu_coregroup_map(cpu);
46 static int __init topology_init(void)
50 #ifdef CONFIG_NEED_MULTIPLE_NODES
51 for_each_online_node(i)
55 for_each_present_cpu(i) {
56 struct cpu *c = &per_cpu(cpu_devices, i);
60 ret = register_cpu(c, i);
62 printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
66 #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
68 * In the UP case, make sure the CPU association is still
69 * registered under each node. Without this, sysfs fails
70 * to make the connection between nodes other than node0
73 for_each_online_node(i)
74 if (i != numa_node_id())
75 register_cpu_under_node(raw_smp_processor_id(), i);
80 subsys_initcall(topology_init);