| /* |
| * Populate sysfs with topology information |
| * |
| * Written by: Matthew Dobson, IBM Corporation |
| * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL |
| * |
| * Copyright (C) 2002, IBM Corp. |
| * |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| * NON INFRINGEMENT. See the GNU General Public License for more |
| * details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Send feedback to <colpatch@us.ibm.com> |
| */ |
| #include <linux/init.h> |
| #include <linux/smp.h> |
| #include <linux/nodemask.h> |
| #include <linux/mmzone.h> |
| #include <asm/cpu.h> |
| |
| static DEFINE_PER_CPU(struct x86_cpu, cpu_devices); |
| |
| int __cpuinit arch_register_cpu(int num) |
| { |
| /* |
| * CPU0 cannot be offlined due to several |
| * restrictions and assumptions in kernel. This basically |
| * doesnt add a control file, one cannot attempt to offline |
| * BSP. |
| * |
| * Also certain PCI quirks require not to enable hotplug control |
| * for all CPU's. |
| */ |
| #ifdef CONFIG_HOTPLUG_CPU |
| if (num) |
| per_cpu(cpu_devices, num).cpu.hotpluggable = 1; |
| #endif |
| |
| return register_cpu(&per_cpu(cpu_devices, num).cpu, num); |
| } |
| |
| #ifdef CONFIG_HOTPLUG_CPU |
| void arch_unregister_cpu(int num) |
| { |
| return unregister_cpu(&per_cpu(cpu_devices, num).cpu); |
| } |
| EXPORT_SYMBOL(arch_register_cpu); |
| EXPORT_SYMBOL(arch_unregister_cpu); |
| #endif /*CONFIG_HOTPLUG_CPU*/ |
| |
| static int __init topology_init(void) |
| { |
| int i; |
| |
| #ifdef CONFIG_NUMA |
| for_each_online_node(i) |
| register_one_node(i); |
| #endif /* CONFIG_NUMA */ |
| |
| for_each_present_cpu(i) |
| arch_register_cpu(i); |
| return 0; |
| } |
| |
| subsys_initcall(topology_init); |