1 /* 2 * linux/include/asm-generic/topology.h 3 * 4 * Written by: Matthew Dobson, IBM Corporation 5 * 6 * Copyright (C) 2002, IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <colpatch@us.ibm.com> 26 */ 27 #ifndef _ASM_GENERIC_TOPOLOGY_H 28 #define _ASM_GENERIC_TOPOLOGY_H 29 30 #ifndef CONFIG_NUMA 31 32 /* Other architectures wishing to use this simple topology API should fill 33 in the below functions as appropriate in their own <asm/topology.h> file. */ 34 #ifndef cpu_to_node 35 #define cpu_to_node(cpu) ((void)(cpu),0) 36 #endif 37 #ifndef parent_node 38 #define parent_node(node) ((void)(node),0) 39 #endif 40 #ifndef node_to_cpumask 41 #define node_to_cpumask(node) ((void)node, cpu_online_map) 42 #endif 43 #ifndef node_to_first_cpu 44 #define node_to_first_cpu(node) ((void)(node),0) 45 #endif 46 #ifndef pcibus_to_node 47 #define pcibus_to_node(bus) ((void)(bus), -1) 48 #endif 49 50 #ifndef pcibus_to_cpumask 51 #define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \ 52 CPU_MASK_ALL : \ 53 node_to_cpumask(pcibus_to_node(bus)) \ 54 ) 55 #endif 56 57 #endif /* CONFIG_NUMA */ 58 59 /* returns pointer to cpumask for specified node */ 60 #ifndef node_to_cpumask_ptr 61 62 #define node_to_cpumask_ptr(v, node) \ 63 cpumask_t _##v = node_to_cpumask(node); \ 64 const cpumask_t *v = &_##v 65 66 #define node_to_cpumask_ptr_next(v, node) \ 67 _##v = node_to_cpumask(node) 68 #endif 69 70 #endif /* _ASM_GENERIC_TOPOLOGY_H */ 71