arch/arm/mach-shmobile/platsmp.c

   1 /*
   2  * SMP support for R-Mobile / SH-Mobile
   3  *
   4  * Copyright (C) 2010  Magnus Damm
   5  * Copyright (C) 2011  Paul Mundt
   6  *
   7  * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #include <linux/init.h>
  14 #include <linux/smp.h>
  15 #include <asm/hardware/gic.h>
  16
  17 void __init shmobile_smp_init_cpus(unsigned int ncores)
  18 {
  19         unsigned int i;
  20
  21         if (ncores > nr_cpu_ids) {
  22                 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
  23                         ncores, nr_cpu_ids);
  24                 ncores = nr_cpu_ids;
  25         }
  26
  27         for (i = 0; i < ncores; i++)
  28                 set_cpu_possible(i, true);
  29
  30         set_smp_cross_call(gic_raise_softirq);
  31 }