arch/arm/include/asm/mach/irq.h

   1 /*
   2  *  arch/arm/include/asm/mach/irq.h
   3  *
   4  *  Copyright (C) 1995-2000 Russell King.
   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_MACH_IRQ_H
  11 #define __ASM_ARM_MACH_IRQ_H
  12
  13 #include <linux/irq.h>
  14
  15 struct seq_file;
  16
  17 /*
  18  * This is internal.  Do not use it.
  19  */
  20 extern void init_FIQ(void);
  21 extern int show_fiq_list(struct seq_file *, int);
  22
  23 #ifdef CONFIG_MULTI_IRQ_HANDLER
  24 extern void (*handle_arch_irq)(struct pt_regs *);
  25 #endif
  26
  27 /*
  28  * This is for easy migration, but should be changed in the source
  29  */
  30 #define do_bad_IRQ(irq,desc)                            \
  31 do {                                                    \
  32         raw_spin_lock(&desc->lock);                     \
  33         handle_bad_irq(irq, desc);                      \
  34         raw_spin_unlock(&desc->lock);                   \
  35 } while(0)
  36
  37 #ifndef __ASSEMBLY__
  38 /*
  39  * Entry/exit functions for chained handlers where the primary IRQ chip
  40  * may implement either fasteoi or level-trigger flow control.
  41  */
  42 static inline void chained_irq_enter(struct irq_chip *chip,
  43                                      struct irq_desc *desc)
  44 {
  45         /* FastEOI controllers require no action on entry. */
  46         if (chip->irq_eoi)
  47                 return;
  48
  49         if (chip->irq_mask_ack) {
  50                 chip->irq_mask_ack(&desc->irq_data);
  51         } else {
  52                 chip->irq_mask(&desc->irq_data);
  53                 if (chip->irq_ack)
  54                         chip->irq_ack(&desc->irq_data);
  55         }
  56 }
  57
  58 static inline void chained_irq_exit(struct irq_chip *chip,
  59                                     struct irq_desc *desc)
  60 {
  61         if (chip->irq_eoi)
  62                 chip->irq_eoi(&desc->irq_data);
  63         else
  64                 chip->irq_unmask(&desc->irq_data);
  65 }
  66 #endif
  67
  68 #endif