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 set_numa_node
38 #define set_numa_node(node)
39 #endif
40 #ifndef set_cpu_numa_node
41 #define set_cpu_numa_node(cpu, node)
42 #endif
43 #ifndef cpu_to_mem
44 #define cpu_to_mem(cpu)		((void)(cpu),0)
45 #endif
46 
47 #ifndef cpumask_of_node
48   #ifdef CONFIG_NEED_MULTIPLE_NODES
49     #define cpumask_of_node(node)	((node) == 0 ? cpu_online_mask : cpu_none_mask)
50   #else
51     #define cpumask_of_node(node)	((void)(node), cpu_online_mask)
52   #endif
53 #endif
54 #ifndef pcibus_to_node
55 #define pcibus_to_node(bus)	((void)(bus), -1)
56 #endif
57 
58 #ifndef cpumask_of_pcibus
59 #define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
60 				 cpu_all_mask :				\
61 				 cpumask_of_node(pcibus_to_node(bus)))
62 #endif
63 
64 #endif	/* CONFIG_NUMA */
65 
66 #if !defined(CONFIG_NUMA) || !defined(CONFIG_HAVE_MEMORYLESS_NODES)
67 
68 #ifndef set_numa_mem
69 #define set_numa_mem(node)
70 #endif
71 #ifndef set_cpu_numa_mem
72 #define set_cpu_numa_mem(cpu, node)
73 #endif
74 
75 #endif	/* !CONFIG_NUMA || !CONFIG_HAVE_MEMORYLESS_NODES */
76 
77 #endif /* _ASM_GENERIC_TOPOLOGY_H */
78