1/*
 2 * arch/sh/kernel/topology.c
 3 *
 4 *  Copyright (C) 2007  Paul Mundt
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10#include <linux/cpu.h>
11#include <linux/cpumask.h>
12#include <linux/init.h>
13#include <linux/percpu.h>
14#include <linux/topology.h>
15#include <linux/node.h>
16#include <linux/nodemask.h>
17#include <linux/export.h>
18
19static DEFINE_PER_CPU(struct cpu, cpu_devices);
20
21cpumask_t cpu_core_map[NR_CPUS];
22EXPORT_SYMBOL(cpu_core_map);
23
24static cpumask_t cpu_coregroup_map(int cpu)
25{
26	/*
27	 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
28	 * simple until we have a method for determining topology..
29	 */
30	return *cpu_possible_mask;
31}
32
33const struct cpumask *cpu_coregroup_mask(int cpu)
34{
35	return &cpu_core_map[cpu];
36}
37
38int arch_update_cpu_topology(void)
39{
40	unsigned int cpu;
41
42	for_each_possible_cpu(cpu)
43		cpu_core_map[cpu] = cpu_coregroup_map(cpu);
44
45	return 0;
46}
47
48static int __init topology_init(void)
49{
50	int i, ret;
51
52#ifdef CONFIG_NEED_MULTIPLE_NODES
53	for_each_online_node(i)
54		register_one_node(i);
55#endif
56
57	for_each_present_cpu(i) {
58		struct cpu *c = &per_cpu(cpu_devices, i);
59
60		c->hotpluggable = 1;
61
62		ret = register_cpu(c, i);
63		if (unlikely(ret))
64			printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
65			       __func__, i, ret);
66	}
67
68#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
69	/*
70	 * In the UP case, make sure the CPU association is still
71	 * registered under each node. Without this, sysfs fails
72	 * to make the connection between nodes other than node0
73	 * and cpu0.
74	 */
75	for_each_online_node(i)
76		if (i != numa_node_id())
77			register_cpu_under_node(raw_smp_processor_id(), i);
78#endif
79
80	return 0;
81}
82subsys_initcall(topology_init);

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * arch/sh/kernel/topology.c
 4 *
 5 *  Copyright (C) 2007  Paul Mundt
 
 
 
 
 6 */
 7#include <linux/cpu.h>
 8#include <linux/cpumask.h>
 9#include <linux/init.h>
10#include <linux/percpu.h>
11#include <linux/topology.h>
12#include <linux/node.h>
13#include <linux/nodemask.h>
14#include <linux/export.h>
15
16static DEFINE_PER_CPU(struct cpu, cpu_devices);
17
18cpumask_t cpu_core_map[NR_CPUS];
19EXPORT_SYMBOL(cpu_core_map);
20
21static cpumask_t cpu_coregroup_map(int cpu)
22{
23	/*
24	 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
25	 * simple until we have a method for determining topology..
26	 */
27	return *cpu_possible_mask;
28}
29
30const struct cpumask *cpu_coregroup_mask(int cpu)
31{
32	return &cpu_core_map[cpu];
33}
34
35int arch_update_cpu_topology(void)
36{
37	unsigned int cpu;
38
39	for_each_possible_cpu(cpu)
40		cpu_core_map[cpu] = cpu_coregroup_map(cpu);
41
42	return 0;
43}
44
45static int __init topology_init(void)
46{
47	int i, ret;
48
49#ifdef CONFIG_NEED_MULTIPLE_NODES
50	for_each_online_node(i)
51		register_one_node(i);
52#endif
53
54	for_each_present_cpu(i) {
55		struct cpu *c = &per_cpu(cpu_devices, i);
56
57		c->hotpluggable = 1;
58
59		ret = register_cpu(c, i);
60		if (unlikely(ret))
61			printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
62			       __func__, i, ret);
63	}
64
65#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
66	/*
67	 * In the UP case, make sure the CPU association is still
68	 * registered under each node. Without this, sysfs fails
69	 * to make the connection between nodes other than node0
70	 * and cpu0.
71	 */
72	for_each_online_node(i)
73		if (i != numa_node_id())
74			register_cpu_under_node(raw_smp_processor_id(), i);
75#endif
76
77	return 0;
78}
79subsys_initcall(topology_init);