arm/mach-keystone/platsmp.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Keystone SOC SMP platform code
0004  *
0005  * Copyright 2013 Texas Instruments, Inc.
0006  *  Cyril Chemparathy <cyril@ti.com>
0007  *  Santosh Shilimkar <santosh.shillimkar@ti.com>
0008  *
0009  * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
0010  */
0011
0012 #include <linux/init.h>
0013 #include <linux/smp.h>
0014 #include <linux/io.h>
0015 #include <linux/pgtable.h>
0016
0017 #include <asm/smp_plat.h>
0018 #include <asm/prom.h>
0019 #include <asm/tlbflush.h>
0020
0021 #include "keystone.h"
0022
0023 static int keystone_smp_boot_secondary(unsigned int cpu,
0024                         struct task_struct *idle)
0025 {
0026     unsigned long start = virt_to_idmap(&secondary_startup);
0027     int error;
0028
0029     pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
0030          cpu, start);
0031
0032     error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
0033     if (error)
0034         pr_err("CPU %d bringup failed with %d\n", cpu, error);
0035
0036     return error;
0037 }
0038
0039 const struct smp_operations keystone_smp_ops __initconst = {
0040     .smp_boot_secondary = keystone_smp_boot_secondary,
0041 };