include/asm-mips/irq.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
   7  * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
   8  */
   9 #ifndef _ASM_IRQ_H
  10 #define _ASM_IRQ_H
  11
  12 #include <linux/config.h>
  13 #include <linux/linkage.h>
  14 #include <irq.h>
  15
  16 #ifdef CONFIG_I8259
  17 static inline int irq_canonicalize(int irq)
  18 {
  19         return ((irq == 2) ? 9 : irq);
  20 }
  21 #else
  22 #define irq_canonicalize(irq) (irq)     /* Sane hardware, sane code ... */
  23 #endif
  24
  25 struct pt_regs;
  26
  27 #ifdef CONFIG_PREEMPT
  28
  29 extern asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs);
  30
  31 #else
  32
  33 /*
  34  * do_IRQ handles all normal device IRQ's (the special
  35  * SMP cross-CPU interrupts have their own specific
  36  * handlers).
  37  *
  38  * Ideally there should be away to get this into kernel/irq/handle.c to
  39  * avoid the overhead of a call for just a tiny function ...
  40  */
  41 #define do_IRQ(irq, regs)                                               \
  42 do {                                                                    \
  43         irq_enter();                                                    \
  44         __do_IRQ((irq), (regs));                                        \
  45         irq_exit();                                                     \
  46 } while (0)
  47
  48 #endif
  49
  50 extern void arch_init_irq(void);
  51
  52 struct irqaction;
  53 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
  54
  55 #endif /* _ASM_IRQ_H */