| /* |
| * Copyright (C) 2007 Paul Mundt |
| * Copyright (C) 2010 Imagination Technolohies Ltd. |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| #include <linux/cpu.h> |
| #include <linux/cpumask.h> |
| #include <linux/init.h> |
| #include <linux/percpu.h> |
| #include <linux/node.h> |
| #include <linux/nodemask.h> |
| #include <linux/topology.h> |
| |
| #include <asm/cpu.h> |
| |
| DEFINE_PER_CPU(struct cpuinfo_metag, cpu_data); |
| |
| cpumask_t cpu_core_map[NR_CPUS]; |
| |
| static cpumask_t cpu_coregroup_map(unsigned int cpu) |
| { |
| return *cpu_possible_mask; |
| } |
| |
| const struct cpumask *cpu_coregroup_mask(unsigned 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; |
| |
| #ifdef CONFIG_NEED_MULTIPLE_NODES |
| for_each_online_node(i) |
| register_one_node(i); |
| #endif |
| |
| for_each_present_cpu(i) { |
| struct cpuinfo_metag *cpuinfo = &per_cpu(cpu_data, i); |
| #ifdef CONFIG_HOTPLUG_CPU |
| cpuinfo->cpu.hotpluggable = 1; |
| #endif |
| ret = register_cpu(&cpuinfo->cpu, i); |
| if (unlikely(ret)) |
| pr_warn("%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); |