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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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428ab280a0
MIPS doesn't do CPU hotplugging yet but since many of the functions don't even have an __init let's fix this right. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/*
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* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can distribute it and/or modify it
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* 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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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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*/
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/*
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* Simulator Platform-specific hooks for SMP operation
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/cpumask.h>
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#include <linux/interrupt.h>
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#include <linux/smp.h>
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#include <asm/atomic.h>
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#include <asm/cpu.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/mmu_context.h>
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#ifdef CONFIG_MIPS_MT_SMTC
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#include <asm/smtc_ipi.h>
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#endif /* CONFIG_MIPS_MT_SMTC */
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/* VPE/SMP Prototype implements platform interfaces directly */
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#if !defined(CONFIG_MIPS_MT_SMP)
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/*
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* Cause the specified action to be performed on a targeted "CPU"
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*/
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void core_send_ipi(int cpu, unsigned int action)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
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#endif /* CONFIG_MIPS_MT_SMTC */
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/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
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}
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/*
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* Platform "CPU" startup hook
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*/
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void __cpuinit prom_boot_secondary(int cpu, struct task_struct *idle)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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smtc_boot_secondary(cpu, idle);
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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/*
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* Post-config but pre-boot cleanup entry point
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*/
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void __cpuinit prom_init_secondary(void)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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void smtc_init_secondary(void);
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smtc_init_secondary();
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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void plat_smp_setup(void)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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if (read_c0_config3() & (1 << 2))
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mipsmt_build_cpu_map(0);
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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/*
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* Platform SMP pre-initialization
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*/
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void plat_prepare_cpus(unsigned int max_cpus)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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/*
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* As noted above, we can assume a single CPU for now
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* but it may be multithreaded.
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*/
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if (read_c0_config3() & (1 << 2)) {
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mipsmt_prepare_cpus();
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}
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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/*
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* SMP initialization finalization entry point
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*/
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void __cpuinit prom_smp_finish(void)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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smtc_smp_finish();
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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/*
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* Hook for after all CPUs are online
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*/
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void prom_cpus_done(void)
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{
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#ifdef CONFIG_MIPS_MT_SMTC
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#endif /* CONFIG_MIPS_MT_SMTC */
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}
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#endif /* CONFIG_MIPS32R2_MT_SMP */
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