arch/arm/include/asm/localtimer.h

   1 /*
   2  *  arch/arm/include/asm/localtimer.h
   3  *
   4  *  Copyright (C) 2004-2005 ARM Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __ASM_ARM_LOCALTIMER_H
  11 #define __ASM_ARM_LOCALTIMER_H
  12
  13 #include <linux/interrupt.h>
  14
  15 struct clock_event_device;
  16
  17 /*
  18  * Setup a per-cpu timer, whether it be a local timer or dummy broadcast
  19  */
  20 void percpu_timer_setup(void);
  21
  22 /*
  23  * Per-cpu timer IRQ handler
  24  */
  25 irqreturn_t percpu_timer_handler(int irq, void *dev_id);
  26
  27 #ifdef CONFIG_LOCAL_TIMERS
  28
  29 #ifdef CONFIG_HAVE_ARM_TWD
  30
  31 #include "smp_twd.h"
  32
  33 #define local_timer_ack()       twd_timer_ack()
  34
  35 #else
  36
  37 /*
  38  * Platform provides this to acknowledge a local timer IRQ.
  39  * Returns true if the local timer IRQ is to be processed.
  40  */
  41 int local_timer_ack(void);
  42
  43 #endif
  44
  45 /*
  46  * Setup a local timer interrupt for a CPU.
  47  */
  48 int local_timer_setup(struct clock_event_device *);
  49
  50 #else
  51
  52 static inline int local_timer_setup(struct clock_event_device *evt)
  53 {
  54         return -ENXIO;
  55 }
  56 #endif
  57
  58 #endif