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 struct clock_event_device;
  14
  15 /*
  16  * Setup a per-cpu timer, whether it be a local timer or dummy broadcast
  17  */
  18 void percpu_timer_setup(void);
  19
  20 /*
  21  * Called from assembly, this is the local timer IRQ handler
  22  */
  23 asmlinkage void do_local_timer(struct pt_regs *);
  24
  25
  26 #ifdef CONFIG_LOCAL_TIMERS
  27
  28 #ifdef CONFIG_HAVE_ARM_TWD
  29
  30 #include "smp_twd.h"
  31
  32 #define local_timer_ack()       twd_timer_ack()
  33
  34 #else
  35
  36 /*
  37  * Platform provides this to acknowledge a local timer IRQ.
  38  * Returns true if the local timer IRQ is to be processed.
  39  */
  40 int local_timer_ack(void);
  41
  42 #endif
  43
  44 /*
  45  * Setup a local timer interrupt for a CPU.
  46  */
  47 int local_timer_setup(struct clock_event_device *);
  48
  49 #else
  50
  51 static inline int local_timer_setup(struct clock_event_device *evt)
  52 {
  53         return -ENXIO;
  54 }
  55 #endif
  56
  57 #endif