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1da177e4 | 1 | /* |
9c869eda | 2 | * arch/i386/kernel/topology.c - Populate driverfs with topology information |
1da177e4 LT |
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 | * | |
9c869eda | 9 | * All rights reserved. |
1da177e4 LT |
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/init.h> | |
29 | #include <linux/smp.h> | |
30 | #include <linux/nodemask.h> | |
aada06c9 | 31 | #include <linux/mmzone.h> |
1da177e4 LT |
32 | #include <asm/cpu.h> |
33 | ||
34 | static struct i386_cpu cpu_devices[NR_CPUS]; | |
35 | ||
76b67ed9 KH |
36 | int arch_register_cpu(int num) |
37 | { | |
bdaff4a3 AR |
38 | /* |
39 | * CPU0 cannot be offlined due to several | |
40 | * restrictions and assumptions in kernel. This basically | |
41 | * doesnt add a control file, one cannot attempt to offline | |
42 | * BSP. | |
43 | */ | |
44 | if (!num) | |
45 | cpu_devices[num].cpu.no_control = 1; | |
46 | ||
76b67ed9 | 47 | return register_cpu(&cpu_devices[num].cpu, num); |
1da177e4 LT |
48 | } |
49 | ||
50 | #ifdef CONFIG_HOTPLUG_CPU | |
51 | ||
52 | void arch_unregister_cpu(int num) { | |
76b67ed9 | 53 | return unregister_cpu(&cpu_devices[num].cpu); |
1da177e4 LT |
54 | } |
55 | EXPORT_SYMBOL(arch_register_cpu); | |
56 | EXPORT_SYMBOL(arch_unregister_cpu); | |
57 | #endif /*CONFIG_HOTPLUG_CPU*/ | |
58 | ||
1da177e4 LT |
59 | static int __init topology_init(void) |
60 | { | |
61 | int i; | |
62 | ||
aada06c9 | 63 | #ifdef CONFIG_NUMA |
76e4f660 | 64 | for_each_online_node(i) |
0fc44159 | 65 | register_one_node(i); |
aada06c9 | 66 | #endif /* CONFIG_NUMA */ |
76e4f660 | 67 | |
a888cebe | 68 | for_each_present_cpu(i) |
76e4f660 | 69 | arch_register_cpu(i); |
1da177e4 LT |
70 | return 0; |
71 | } | |
72 | ||
1da177e4 | 73 | subsys_initcall(topology_init); |