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