58 lines
1.4 KiB
C
58 lines
1.4 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 <asm/tlbflush.h>
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#include <asm/pgtable.h>
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#include "keystone.h"
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static int 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_idmap(&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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error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
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if (error)
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pr_err("CPU %d bringup failed with %d\n", cpu, error);
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return error;
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}
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#ifdef CONFIG_ARM_LPAE
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static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
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{
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pgd_t *pgd0 = pgd_offset_k(0);
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cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
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local_flush_tlb_all();
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}
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#else
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static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
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{}
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#endif
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struct smp_operations keystone_smp_ops __initdata = {
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.smp_boot_secondary = keystone_smp_boot_secondary,
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.smp_secondary_init = keystone_smp_secondary_initmem,
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};
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