arch/arm/mach-keystone/platsmp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Keystone SOC SMP platform code
   4  *
   5  * Copyright 2013 Texas Instruments, Inc.
   6  *      Cyril Chemparathy <cyril@ti.com>
   7  *      Santosh Shilimkar <santosh.shillimkar@ti.com>
   8  *
   9  * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/smp.h>
  14 #include <linux/io.h>
  15
  16 #include <asm/smp_plat.h>
  17 #include <asm/prom.h>
  18 #include <asm/tlbflush.h>
  19 #include <asm/pgtable.h>
  20
  21 #include "keystone.h"
  22
  23 static int keystone_smp_boot_secondary(unsigned int cpu,
  24                                                 struct task_struct *idle)
  25 {
  26         unsigned long start = virt_to_idmap(&secondary_startup);
  27         int error;
  28
  29         pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
  30                  cpu, start);
  31
  32         error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
  33         if (error)
  34                 pr_err("CPU %d bringup failed with %d\n", cpu, error);
  35
  36         return error;
  37 }
  38
  39 const struct smp_operations keystone_smp_ops __initconst = {
  40         .smp_boot_secondary     = keystone_smp_boot_secondary,
  41 };