| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 76 | for (i = 0; i < MAX_NUMNODES; i++) { |
| 77 | if (node_online(i)) |
| 78 | arch_register_node(i); |
| 79 | } |
| 80 | for (i = 0; i < NR_CPUS; i++) |
| 81 | if (cpu_possible(i)) arch_register_cpu(i); |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | #else /* !CONFIG_NUMA */ |
| 86 | |
| 87 | static int __init topology_init(void) |
| 88 | { |
| 89 | int i; |
| 90 | |
| 91 | for (i = 0; i < NR_CPUS; i++) |
| 92 | if (cpu_possible(i)) arch_register_cpu(i); |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | #endif /* CONFIG_NUMA */ |
| 97 | |
| 98 | subsys_initcall(topology_init); |