forked from Minki/linux
fecf84c14f
Update the KZM9G defconfig and the code in platsmp.c to support SMP on the sh73a0 based KZM9G board. Also fix up the earlyprintk setting that was previously incorrect. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
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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() || machine_is_kzm9g())
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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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