1 | /* |
2 | * Populate sysfs with topology information |
3 | * |
4 | * Written by: Matthew Dobson, IBM Corporation |
5 | * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL |
6 | * |
7 | * Copyright (C) 2002, IBM Corp. |
8 | * |
9 | * All rights reserved. |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2 of the License, or |
14 | * (at your option) any later version. |
15 | * |
16 | * This program is distributed in the hope that it will be useful, but |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
19 | * NON INFRINGEMENT. See the GNU General Public License for more |
20 | * details. |
21 | * |
22 | * You should have received a copy of the GNU General Public License |
23 | * along with this program; if not, write to the Free Software |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | * |
26 | * Send feedback to <colpatch@us.ibm.com> |
27 | */ |
28 | #include <linux/interrupt.h> |
29 | #include <linux/nodemask.h> |
30 | #include <linux/export.h> |
31 | #include <linux/mmzone.h> |
32 | #include <linux/init.h> |
33 | #include <linux/smp.h> |
34 | #include <linux/irq.h> |
35 | #include <asm/io_apic.h> |
36 | #include <asm/cpu.h> |
37 | |
38 | static DEFINE_PER_CPU(struct x86_cpu, cpu_devices); |
39 | |
40 | #ifdef CONFIG_HOTPLUG_CPU |
41 | int arch_register_cpu(int cpu) |
42 | { |
43 | struct x86_cpu *xc = per_cpu_ptr(&cpu_devices, cpu); |
44 | |
45 | xc->cpu.hotpluggable = cpu > 0; |
46 | return register_cpu(cpu: &xc->cpu, num: cpu); |
47 | } |
48 | EXPORT_SYMBOL(arch_register_cpu); |
49 | |
50 | void arch_unregister_cpu(int num) |
51 | { |
52 | unregister_cpu(cpu: &per_cpu(cpu_devices, num).cpu); |
53 | } |
54 | EXPORT_SYMBOL(arch_unregister_cpu); |
55 | #else /* CONFIG_HOTPLUG_CPU */ |
56 | |
57 | int __init arch_register_cpu(int num) |
58 | { |
59 | return register_cpu(&per_cpu(cpu_devices, num).cpu, num); |
60 | } |
61 | #endif /* CONFIG_HOTPLUG_CPU */ |
62 | |
63 | static int __init topology_init(void) |
64 | { |
65 | int i; |
66 | |
67 | for_each_present_cpu(i) |
68 | arch_register_cpu(i); |
69 | |
70 | return 0; |
71 | } |
72 | subsys_initcall(topology_init); |
73 | |