| /* |
| * Keystone SOC SMP platform code |
| * |
| * Copyright 2013 Texas Instruments, Inc. |
| * Cyril Chemparathy <cyril@ti.com> |
| * Santosh Shilimkar <santosh.shillimkar@ti.com> |
| * |
| * Based on platsmp.c, Copyright (C) 2002 ARM Ltd. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/smp.h> |
| #include <linux/io.h> |
| |
| #include <asm/smp_plat.h> |
| #include <asm/prom.h> |
| |
| #include "keystone.h" |
| |
| static int __cpuinit keystone_smp_boot_secondary(unsigned int cpu, |
| struct task_struct *idle) |
| { |
| unsigned long start = virt_to_phys(&secondary_startup); |
| int error; |
| |
| pr_debug("keystone-smp: booting cpu %d, vector %08lx\n", |
| cpu, start); |
| |
| asm volatile ( |
| "mov r0, #0\n" /* power on cmd */ |
| "mov r1, %1\n" /* cpu */ |
| "mov r2, %2\n" /* start */ |
| ".inst 0xe1600070\n" /* smc #0 */ |
| "mov %0, r0\n" |
| : "=r" (error) |
| : "r"(cpu), "r"(start) |
| : "cc", "r0", "r1", "r2", "memory" |
| ); |
| |
| pr_debug("keystone-smp: monitor returned %d\n", error); |
| |
| return error; |
| } |
| |
| struct smp_operations keystone_smp_ops __initdata = { |
| .smp_init_cpus = arm_dt_init_cpu_maps, |
| .smp_boot_secondary = keystone_smp_boot_secondary, |
| }; |