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42682c6c JH |
1 | /* |
2 | * Copyright (C) 2007 Paul Mundt | |
3 | * Copyright (C) 2010 Imagination Technolohies Ltd. | |
4 | * | |
5 | * This file is subject to the terms and conditions of the GNU General Public | |
6 | * License. See the file "COPYING" in the main directory of this archive | |
7 | * for more details. | |
8 | */ | |
9 | #include <linux/cpu.h> | |
10 | #include <linux/cpumask.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/percpu.h> | |
13 | #include <linux/node.h> | |
14 | #include <linux/nodemask.h> | |
15 | #include <linux/topology.h> | |
16 | ||
17 | #include <asm/cpu.h> | |
18 | ||
19 | DEFINE_PER_CPU(struct cpuinfo_metag, cpu_data); | |
20 | ||
21 | cpumask_t cpu_core_map[NR_CPUS]; | |
40979d32 | 22 | EXPORT_SYMBOL(cpu_core_map); |
42682c6c JH |
23 | |
24 | static cpumask_t cpu_coregroup_map(unsigned int cpu) | |
25 | { | |
26 | return *cpu_possible_mask; | |
27 | } | |
28 | ||
29 | const struct cpumask *cpu_coregroup_mask(unsigned int cpu) | |
30 | { | |
31 | return &cpu_core_map[cpu]; | |
32 | } | |
33 | ||
34 | int arch_update_cpu_topology(void) | |
35 | { | |
36 | unsigned int cpu; | |
37 | ||
38 | for_each_possible_cpu(cpu) | |
39 | cpu_core_map[cpu] = cpu_coregroup_map(cpu); | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int __init topology_init(void) | |
45 | { | |
46 | int i, ret; | |
47 | ||
48 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
49 | for_each_online_node(i) | |
50 | register_one_node(i); | |
51 | #endif | |
52 | ||
53 | for_each_present_cpu(i) { | |
54 | struct cpuinfo_metag *cpuinfo = &per_cpu(cpu_data, i); | |
55 | #ifdef CONFIG_HOTPLUG_CPU | |
56 | cpuinfo->cpu.hotpluggable = 1; | |
57 | #endif | |
58 | ret = register_cpu(&cpuinfo->cpu, i); | |
59 | if (unlikely(ret)) | |
60 | pr_warn("%s: register_cpu %d failed (%d)\n", | |
61 | __func__, i, ret); | |
62 | } | |
63 | ||
64 | #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP) | |
65 | /* | |
66 | * In the UP case, make sure the CPU association is still | |
67 | * registered under each node. Without this, sysfs fails | |
68 | * to make the connection between nodes other than node0 | |
69 | * and cpu0. | |
70 | */ | |
71 | for_each_online_node(i) | |
72 | if (i != numa_node_id()) | |
73 | register_cpu_under_node(raw_smp_processor_id(), i); | |
74 | #endif | |
75 | ||
76 | return 0; | |
77 | } | |
78 | subsys_initcall(topology_init); |