arch/arm/mach-keystone/platsmp.c

   1 /*
   2  * Keystone SOC SMP platform code
   3  *
   4  * Copyright 2013 Texas Instruments, Inc.
   5  *      Cyril Chemparathy <cyril@ti.com>
   6  *      Santosh Shilimkar <santosh.shillimkar@ti.com>
   7  *
   8  * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms and conditions of the GNU General Public License,
  12  * version 2, as published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/init.h>
  16 #include <linux/smp.h>
  17 #include <linux/io.h>
  18
  19 #include <asm/smp_plat.h>
  20 #include <asm/prom.h>
  21
  22 #include "keystone.h"
  23
  24 static int keystone_smp_boot_secondary(unsigned int cpu,
  25                                                 struct task_struct *idle)
  26 {
  27         unsigned long start = virt_to_phys(&secondary_startup);
  28         int error;
  29
  30         pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
  31                  cpu, start);
  32
  33         error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
  34         if (error)
  35                 pr_err("CPU %d bringup failed with %d\n", cpu, error);
  36
  37         return error;
  38 }
  39
  40 struct smp_operations keystone_smp_ops __initdata = {
  41         .smp_boot_secondary     = keystone_smp_boot_secondary,
  42 };