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1da177e4 LT |
1 | /* |
2 | * arch/i386/mach-generic/topology.c - Populate driverfs 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/init.h> | |
29 | #include <linux/smp.h> | |
30 | #include <linux/nodemask.h> | |
31 | #include <asm/cpu.h> | |
32 | ||
33 | static struct i386_cpu cpu_devices[NR_CPUS]; | |
34 | ||
35 | int arch_register_cpu(int num){ | |
36 | struct node *parent = NULL; | |
37 | ||
38 | #ifdef CONFIG_NUMA | |
39 | int node = cpu_to_node(num); | |
40 | if (node_online(node)) | |
41 | parent = &node_devices[node].node; | |
42 | #endif /* CONFIG_NUMA */ | |
43 | ||
44 | return register_cpu(&cpu_devices[num].cpu, num, parent); | |
45 | } | |
46 | ||
47 | #ifdef CONFIG_HOTPLUG_CPU | |
48 | ||
49 | void arch_unregister_cpu(int num) { | |
50 | struct node *parent = NULL; | |
51 | ||
52 | #ifdef CONFIG_NUMA | |
53 | int node = cpu_to_node(num); | |
54 | if (node_online(node)) | |
55 | parent = &node_devices[node].node; | |
56 | #endif /* CONFIG_NUMA */ | |
57 | ||
58 | return unregister_cpu(&cpu_devices[num].cpu, parent); | |
59 | } | |
60 | EXPORT_SYMBOL(arch_register_cpu); | |
61 | EXPORT_SYMBOL(arch_unregister_cpu); | |
62 | #endif /*CONFIG_HOTPLUG_CPU*/ | |
63 | ||
64 | ||
65 | ||
66 | #ifdef CONFIG_NUMA | |
67 | #include <linux/mmzone.h> | |
68 | #include <asm/node.h> | |
69 | ||
70 | struct i386_node node_devices[MAX_NUMNODES]; | |
71 | ||
72 | static int __init topology_init(void) | |
73 | { | |
74 | int i; | |
75 | ||
76e4f660 AR |
76 | for_each_online_node(i) |
77 | arch_register_node(i); | |
78 | ||
a888cebe | 79 | for_each_present_cpu(i) |
76e4f660 | 80 | arch_register_cpu(i); |
1da177e4 LT |
81 | return 0; |
82 | } | |
83 | ||
84 | #else /* !CONFIG_NUMA */ | |
85 | ||
86 | static int __init topology_init(void) | |
87 | { | |
88 | int i; | |
89 | ||
a888cebe | 90 | for_each_present_cpu(i) |
76e4f660 | 91 | arch_register_cpu(i); |
1da177e4 LT |
92 | return 0; |
93 | } | |
94 | ||
95 | #endif /* CONFIG_NUMA */ | |
96 | ||
97 | subsys_initcall(topology_init); |