mirror of https://gitee.com/openkylin/linux.git
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
|
|
* arch/sh/kernel/topology.c
|
|
*
|
|
* Copyright (C) 2007 Paul Mundt
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/cpu.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/init.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/node.h>
|
|
#include <linux/nodemask.h>
|
|
|
|
static DEFINE_PER_CPU(struct cpu, cpu_devices);
|
|
|
|
cpumask_t cpu_core_map[NR_CPUS];
|
|
|
|
static cpumask_t cpu_coregroup_map(unsigned int cpu)
|
|
{
|
|
/*
|
|
* Presently all SH-X3 SMP cores are multi-cores, so just keep it
|
|
* simple until we have a method for determining topology..
|
|
*/
|
|
return cpu_possible_map;
|
|
}
|
|
|
|
const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
|
|
{
|
|
return &cpu_core_map[cpu];
|
|
}
|
|
|
|
int arch_update_cpu_topology(void)
|
|
{
|
|
unsigned int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init topology_init(void)
|
|
{
|
|
int i, ret;
|
|
|
|
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
|
for_each_online_node(i)
|
|
register_one_node(i);
|
|
#endif
|
|
|
|
for_each_present_cpu(i) {
|
|
struct cpu *c = &per_cpu(cpu_devices, i);
|
|
|
|
c->hotpluggable = 1;
|
|
|
|
ret = register_cpu(c, i);
|
|
if (unlikely(ret))
|
|
printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
|
|
__func__, i, ret);
|
|
}
|
|
|
|
#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
|
|
/*
|
|
* In the UP case, make sure the CPU association is still
|
|
* registered under each node. Without this, sysfs fails
|
|
* to make the connection between nodes other than node0
|
|
* and cpu0.
|
|
*/
|
|
for_each_online_node(i)
|
|
if (i != numa_node_id())
|
|
register_cpu_under_node(raw_smp_processor_id(), i);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
subsys_initcall(topology_init);
|