74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
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/*
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* SMP support for R-Mobile / SH-Mobile
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*
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* Copyright (C) 2010 Magnus Damm
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*
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* Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <asm/localtimer.h>
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static unsigned int __init shmobile_smp_get_core_count(void)
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{
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return 1;
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}
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static void __init shmobile_smp_prepare_cpus(void)
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{
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/* do nothing for now */
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}
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void __cpuinit platform_secondary_init(unsigned int cpu)
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{
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trace_hardirqs_off();
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}
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int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
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{
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return -ENOSYS;
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}
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void __init smp_init_cpus(void)
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{
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unsigned int ncores = shmobile_smp_get_core_count();
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unsigned int i;
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for (i = 0; i < ncores; i++)
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set_cpu_possible(i, true);
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}
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void __init smp_prepare_cpus(unsigned int max_cpus)
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{
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unsigned int ncores = shmobile_smp_get_core_count();
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unsigned int cpu = smp_processor_id();
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int i;
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smp_store_cpu_info(cpu);
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if (max_cpus > ncores)
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max_cpus = ncores;
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for (i = 0; i < max_cpus; i++)
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set_cpu_present(i, true);
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if (max_cpus > 1) {
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shmobile_smp_prepare_cpus();
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/*
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* Enable the local timer or broadcast device for the
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* boot CPU, but only if we have more than one CPU.
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*/
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percpu_timer_setup();
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}
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}
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