[ARM] 4813/1: Add SMP helper functions for clockevents support
This patch adds the smp_call_function_single and smp_timer_broadcast functions and modifies ipi_timer to call the platform-specific function local_timer_interrupt. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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2 changed files with 37 additions and 2 deletions
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@ -454,6 +454,27 @@ int smp_call_function(void (*func)(void *info), void *info, int retry,
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}
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}
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EXPORT_SYMBOL_GPL(smp_call_function);
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EXPORT_SYMBOL_GPL(smp_call_function);
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int smp_call_function_single(int cpu, void (*func)(void *info), void *info,
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int retry, int wait)
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{
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/* prevent preemption and reschedule on another processor */
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int current_cpu = get_cpu();
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int ret = 0;
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if (cpu == current_cpu) {
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local_irq_disable();
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func(info);
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local_irq_enable();
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} else
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ret = smp_call_function_on_cpu(func, info, retry, wait,
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cpumask_of_cpu(cpu));
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put_cpu();
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return ret;
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}
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EXPORT_SYMBOL_GPL(smp_call_function_single);
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void show_ipi_list(struct seq_file *p)
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void show_ipi_list(struct seq_file *p)
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{
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{
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unsigned int cpu;
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unsigned int cpu;
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@ -481,8 +502,7 @@ void show_local_irqs(struct seq_file *p)
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static void ipi_timer(void)
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static void ipi_timer(void)
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{
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{
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irq_enter();
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irq_enter();
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profile_tick(CPU_PROFILING);
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local_timer_interrupt();
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update_process_times(user_mode(get_irq_regs()));
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irq_exit();
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irq_exit();
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}
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}
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@ -621,6 +641,11 @@ void smp_send_timer(void)
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send_ipi_message(mask, IPI_TIMER);
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send_ipi_message(mask, IPI_TIMER);
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}
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}
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void smp_timer_broadcast(cpumask_t mask)
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{
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send_ipi_message(mask, IPI_TIMER);
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}
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void smp_send_stop(void)
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void smp_send_stop(void)
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{
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{
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cpumask_t mask = cpu_online_map;
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cpumask_t mask = cpu_online_map;
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@ -60,6 +60,11 @@ extern void smp_cross_call(cpumask_t callmap);
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*/
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*/
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extern void smp_send_timer(void);
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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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/*
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* Boot a secondary CPU, and assign it the specified idle task.
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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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* This also gives us the initial stack to use for this CPU.
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@ -96,6 +101,11 @@ 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 int platform_cpu_kill(unsigned int cpu);
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extern void platform_cpu_enable(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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#ifdef CONFIG_LOCAL_TIMERS
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/*
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/*
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* Setup a local timer interrupt for a CPU.
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* Setup a local timer interrupt for a CPU.
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