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/arch/alpha/include/asm/topology.h

http://github.com/mirrors/linux
C Header | 51 lines | 35 code | 14 blank | 2 comment | 5 complexity | f2ce8c751635b507b2bc87e23847f4a3 MD5 | raw file
 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_ALPHA_TOPOLOGY_H
 3#define _ASM_ALPHA_TOPOLOGY_H
 4
 5#include <linux/smp.h>
 6#include <linux/threads.h>
 7#include <linux/numa.h>
 8#include <asm/machvec.h>
 9
10#ifdef CONFIG_NUMA
11static inline int cpu_to_node(int cpu)
12{
13	int node;
14	
15	if (!alpha_mv.cpuid_to_nid)
16		return 0;
17
18	node = alpha_mv.cpuid_to_nid(cpu);
19
20#ifdef DEBUG_NUMA
21	BUG_ON(node < 0);
22#endif
23
24	return node;
25}
26
27extern struct cpumask node_to_cpumask_map[];
28/* FIXME: This is dumb, recalculating every time.  But simple. */
29static const struct cpumask *cpumask_of_node(int node)
30{
31	int cpu;
32
33	if (node == NUMA_NO_NODE)
34		return cpu_all_mask;
35
36	cpumask_clear(&node_to_cpumask_map[node]);
37
38	for_each_online_cpu(cpu) {
39		if (cpu_to_node(cpu) == node)
40			cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
41	}
42
43	return &node_to_cpumask_map[node];
44}
45
46#define cpumask_of_pcibus(bus)	(cpu_online_mask)
47
48#endif /* !CONFIG_NUMA */
49# include <asm-generic/topology.h>
50
51#endif /* _ASM_ALPHA_TOPOLOGY_H */