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/*
* 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,
};
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