1/*
 2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 3 *
 4 *   This program is free software; you can redistribute it and/or
 5 *   modify it under the terms of the GNU General Public License
 6 *   as published by the Free Software Foundation, version 2.
 7 *
 8 *   This program is distributed in the hope that it will be useful, but
 9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#ifndef _ASM_TILE_TOPOLOGY_H
16#define _ASM_TILE_TOPOLOGY_H
17
18#ifdef CONFIG_NUMA
19
20#include <linux/cpumask.h>
21
22/* Mappings between logical cpu number and node number. */
23extern struct cpumask node_2_cpu_mask[];
24extern char cpu_2_node[];
25
26/* Returns the number of the node containing CPU 'cpu'. */
27static inline int cpu_to_node(int cpu)
28{
29	return cpu_2_node[cpu];
30}
31
32/*
33 * Returns the number of the node containing Node 'node'.
34 * This architecture is flat, so it is a pretty simple function!
35 */
36#define parent_node(node) (node)
37
38/* Returns a bitmask of CPUs on Node 'node'. */
39static inline const struct cpumask *cpumask_of_node(int node)
40{
41	return &node_2_cpu_mask[node];
42}
43
44/* For now, use numa node -1 for global allocation. */
45#define pcibus_to_node(bus)		((void)(bus), -1)
46
47#endif /* CONFIG_NUMA */
48
49#include <asm-generic/topology.h>
50
51#ifdef CONFIG_SMP
52#define topology_physical_package_id(cpu)       ((void)(cpu), 0)
53#define topology_core_id(cpu)                   (cpu)
54#define topology_core_cpumask(cpu)              ((void)(cpu), cpu_online_mask)
55#define topology_sibling_cpumask(cpu)           cpumask_of(cpu)
56#endif
57
58#endif /* _ASM_TILE_TOPOLOGY_H */