97 lines
2.0 KiB
C
97 lines
2.0 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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* Copyright (C) 2011 Paul Mundt
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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/hardware/gic.h>
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#include <asm/mach-types.h>
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#include <mach/common.h>
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#define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2())
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#define is_r8a7779() machine_is_marzen()
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static unsigned int __init shmobile_smp_get_core_count(void)
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{
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if (is_sh73a0())
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return sh73a0_get_core_count();
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if (is_r8a7779())
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return r8a7779_get_core_count();
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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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if (is_sh73a0())
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sh73a0_smp_prepare_cpus();
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if (is_r8a7779())
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r8a7779_smp_prepare_cpus();
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}
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int shmobile_platform_cpu_kill(unsigned int cpu)
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{
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if (is_r8a7779())
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return r8a7779_platform_cpu_kill(cpu);
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return 1;
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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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if (is_sh73a0())
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sh73a0_secondary_init(cpu);
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if (is_r8a7779())
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r8a7779_secondary_init(cpu);
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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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if (is_sh73a0())
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return sh73a0_boot_secondary(cpu);
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if (is_r8a7779())
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return r8a7779_boot_secondary(cpu);
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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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if (ncores > nr_cpu_ids) {
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pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
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ncores, nr_cpu_ids);
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ncores = nr_cpu_ids;
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}
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for (i = 0; i < ncores; i++)
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set_cpu_possible(i, true);
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set_smp_cross_call(gic_raise_softirq);
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}
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void __init platform_smp_prepare_cpus(unsigned int max_cpus)
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{
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shmobile_smp_prepare_cpus();
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}
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