a8655e83fc
This patch adds dummy local timers for each CPU so that the board clock device is used to broadcast events to the other CPUs. The patch also adds the declaration for the dummy_timer_setup function (the equivalent of local_timer_setup when CONFIG_LOCAL_TIMERS is not set). Due to the way clockevents work, the dummy timer on the first CPU has to be registered before the board timer. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
144 lines
3 KiB
C
144 lines
3 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/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 raw_smp_processor_id() (current_thread_info()->cpu)
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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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* Called from assembly code, this handles an IPI.
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*/
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asmlinkage void do_IPI(struct pt_regs *regs);
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/*
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* Setup the SMP cpu_possible_map
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*/
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extern void smp_init_cpus(void);
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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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* Broadcast a timer interrupt to the other CPUs.
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*/
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extern void smp_send_timer(void);
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/*
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* Broadcast a clock event to other CPUs.
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*/
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extern void smp_timer_broadcast(cpumask_t mask);
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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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* Called from platform specific assembly code, this is the
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* secondary CPU entry point.
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*/
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asmlinkage void secondary_start_kernel(void);
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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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extern int __cpu_disable(void);
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extern int mach_cpu_disable(unsigned int cpu);
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extern void __cpu_die(unsigned int cpu);
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extern void cpu_die(void);
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extern void platform_cpu_die(unsigned int cpu);
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extern int platform_cpu_kill(unsigned int cpu);
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extern void platform_cpu_enable(unsigned int cpu);
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/*
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* Local timer interrupt handling function (can be IPI'ed).
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*/
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extern void local_timer_interrupt(void);
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#ifdef CONFIG_LOCAL_TIMERS
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/*
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* Stop a local timer interrupt.
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*/
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extern void local_timer_stop(unsigned int cpu);
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/*
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* Platform provides this to acknowledge a local timer IRQ
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*/
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extern int local_timer_ack(void);
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#else
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static inline void local_timer_stop(unsigned int cpu)
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{
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}
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#endif
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/*
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* Setup a local timer interrupt for a CPU.
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*/
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extern void local_timer_setup(unsigned int cpu);
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/*
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* show local interrupt info
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*/
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extern void show_local_irqs(struct seq_file *);
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/*
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* Called from assembly, this is the local timer IRQ handler
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*/
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asmlinkage void do_local_timer(struct pt_regs *);
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#endif /* ifndef __ASM_ARM_SMP_H */
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