linux/arch/arm/mach-keystone/platsmp.c
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   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#include <linux/pgtable.h>
  16
  17#include <asm/smp_plat.h>
  18#include <asm/prom.h>
  19#include <asm/tlbflush.h>
  20
  21#include "keystone.h"
  22
  23static 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
  39const struct smp_operations keystone_smp_ops __initconst = {
  40        .smp_boot_secondary     = keystone_smp_boot_secondary,
  41};
  42