arch/hexagon/kernel/topology.c

   1 /*
   2  * CPU topology for Hexagon
   3  *
   4  * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 and
   8  * only version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20
  21 #include <linux/cpu.h>
  22 #include <linux/cpumask.h>
  23 #include <linux/init.h>
  24 #include <linux/node.h>
  25 #include <linux/nodemask.h>
  26 #include <linux/percpu.h>
  27
  28 /*  Swiped from MIPS.  */
  29
  30 static DEFINE_PER_CPU(struct cpu, cpu_devices);
  31
  32 static int __init topology_init(void)
  33 {
  34         int i, ret;
  35
  36         for_each_present_cpu(i) {
  37
  38                 /*
  39                  * register_cpu takes a per_cpu pointer and
  40                  * just points it at another per_cpu struct...
  41                  */
  42
  43                 ret = register_cpu(&per_cpu(cpu_devices, i), i);
  44                 if (ret)
  45                         printk(KERN_WARNING "topology_init: register_cpu %d "
  46                                "failed (%d)\n", i, ret);
  47         }
  48
  49         return 0;
  50 }
  51
  52 subsys_initcall(topology_init);