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Create a temporary page table to startup secondary processors. This page table must have a 1:1 virtual/physical mapping for the kernel in addition to the standard mappings to ensure that the secondary CPU can enable its MMU safely. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
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* linux/include/asm-arm/smp.h
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*
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* Copyright (C) 2004-2005 ARM Ltd.
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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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#ifndef __ASM_ARM_SMP_H
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#define __ASM_ARM_SMP_H
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#include <linux/config.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/thread_info.h>
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#include <asm/arch/smp.h>
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#ifndef CONFIG_SMP
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# error "<asm-arm/smp.h> included in non-SMP build"
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#endif
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#define smp_processor_id() (current_thread_info()->cpu)
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extern cpumask_t cpu_present_mask;
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#define cpu_possible_map cpu_present_mask
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/*
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* at the moment, there's not a big penalty for changing CPUs
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* (the >big< penalty is running SMP in the first place)
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*/
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#define PROC_CHANGE_PENALTY 15
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struct seq_file;
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/*
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* generate IPI list text
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*/
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extern void show_ipi_list(struct seq_file *p);
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/*
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* Move global data into per-processor storage.
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*/
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extern void smp_store_cpu_info(unsigned int cpuid);
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/*
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* Raise an IPI cross call on CPUs in callmap.
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*/
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extern void smp_cross_call(cpumask_t callmap);
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/*
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* Boot a secondary CPU, and assign it the specified idle task.
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* This also gives us the initial stack to use for this CPU.
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*/
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extern int boot_secondary(unsigned int cpu, struct task_struct *);
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/*
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* Perform platform specific initialisation of the specified CPU.
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*/
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extern void platform_secondary_init(unsigned int cpu);
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/*
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* Initial data for bringing up a secondary CPU.
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*/
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struct secondary_data {
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unsigned long pgdir;
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void *stack;
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};
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extern struct secondary_data secondary_data;
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#endif /* ifndef __ASM_ARM_SMP_H */
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