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);

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