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/errno.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  * Called from assembly, this is the local timer IRQ handler
  24  */
  25 asmlinkage void do_local_timer(struct pt_regs *);
  26
  27
  28 #ifdef CONFIG_LOCAL_TIMERS
  29
  30 #ifdef CONFIG_HAVE_ARM_TWD
  31
  32 #include "smp_twd.h"
  33
  34 #define local_timer_ack()       twd_timer_ack()
  35
  36 #else
  37
  38 /*
  39  * Platform provides this to acknowledge a local timer IRQ.
  40  * Returns true if the local timer IRQ is to be processed.
  41  */
  42 int local_timer_ack(void);
  43
  44 #endif
  45
  46 /*
  47  * Setup a local timer interrupt for a CPU.
  48  */
  49 int local_timer_setup(struct clock_event_device *);
  50
  51 #else
  52
  53 static inline int local_timer_setup(struct clock_event_device *evt)
  54 {
  55         return -ENXIO;
  56 }
  57 #endif
  58
  59 #endif