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];
21 static cpumask_t cpu_coregroup_map(unsigned int cpu)
24 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
25 * simple until we have a method for determining topology..
27 return cpu_possible_map;
30 const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
32 return &cpu_core_map[cpu];
35 int arch_update_cpu_topology(void)
39 for_each_possible_cpu(cpu)
40 cpu_core_map[cpu] = cpu_coregroup_map(cpu);
45 static int __init topology_init(void)
49 #ifdef CONFIG_NEED_MULTIPLE_NODES
50 for_each_online_node(i)
54 for_each_present_cpu(i) {
55 struct cpu *c = &per_cpu(cpu_devices, i);
59 ret = register_cpu(c, i);
61 printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
65 #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
67 * In the UP case, make sure the CPU association is still
68 * registered under each node. Without this, sysfs fails
69 * to make the connection between nodes other than node0
72 for_each_online_node(i)
73 if (i != numa_node_id())
74 register_cpu_under_node(raw_smp_processor_id(), i);
79 subsys_initcall(topology_init);