tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */