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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 <asm/tlbflush.h>
#include <asm/pgtable.h>
#include "keystone.h"
static int keystone_smp_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
unsigned long start = virt_to_idmap(&secondary_startup);
int error;
pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
cpu, start);
error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
if (error)
pr_err("CPU %d bringup failed with %d\n", cpu, error);
return error;
}
#ifdef CONFIG_ARM_LPAE
static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
{
pgd_t *pgd0 = pgd_offset_k(0);
cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
local_flush_tlb_all();
}
#else
static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
{}
#endif
struct smp_operations keystone_smp_ops __initdata = {
.smp_boot_secondary = keystone_smp_boot_secondary,
.smp_secondary_init = keystone_smp_secondary_initmem,
};
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