projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 835c34a1 | 2 | * Populate sysfs 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 | ||
| 30964d54 | 34 | static DEFINE_PER_CPU(struct x86_cpu, cpu_devices); |
| 1da177e4 | 35 | |
| da54becc | 36 | int __cpuinit arch_register_cpu(int num) |
| 76b67ed9 | 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. | |
| fd6d7d26 SS |
43 | * |
| 44 | * Also certain PCI quirks require not to enable hotplug control | |
| 45 | * for all CPU's. | |
| bdaff4a3 | 46 | */ |
| a850cef7 AB |
47 | #ifdef CONFIG_HOTPLUG_CPU |
| 48 | if (num) | |
| 30964d54 | 49 | per_cpu(cpu_devices, num).cpu.hotpluggable = 1; |
| a850cef7 | 50 | #endif |
| bdaff4a3 | 51 | |
| 30964d54 | 52 | return register_cpu(&per_cpu(cpu_devices, num).cpu, num); |
| 1da177e4 LT |
53 | } |
| 54 | ||
| 55 | #ifdef CONFIG_HOTPLUG_CPU | |
| da54becc AM |
56 | void arch_unregister_cpu(int num) |
| 57 | { | |
| 30964d54 | 58 | return unregister_cpu(&per_cpu(cpu_devices, num).cpu); |
| 1da177e4 LT |
59 | } |
| 60 | EXPORT_SYMBOL(arch_register_cpu); | |
| 61 | EXPORT_SYMBOL(arch_unregister_cpu); | |
| 62 | #endif /*CONFIG_HOTPLUG_CPU*/ | |
| 63 | ||
| 1da177e4 LT |
64 | static int __init topology_init(void) |
| 65 | { | |
| 66 | int i; | |
| 67 | ||
| aada06c9 | 68 | #ifdef CONFIG_NUMA |
| 76e4f660 | 69 | for_each_online_node(i) |
| 0fc44159 | 70 | register_one_node(i); |
| aada06c9 | 71 | #endif /* CONFIG_NUMA */ |
| 76e4f660 | 72 | |
| a888cebe | 73 | for_each_present_cpu(i) |
| 76e4f660 | 74 | arch_register_cpu(i); |
| 1da177e4 LT |
75 | return 0; |
| 76 | } | |
| 77 | ||
| 1da177e4 | 78 | subsys_initcall(topology_init); |