include/asm-v850/irq.h

   1 /*
   2  * include/asm-v850/irq.h -- Machine interrupt handling
   3  *
   4  *  Copyright (C) 2001,02,04  NEC Electronics Corporation
   5  *  Copyright (C) 2001,02,04  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #ifndef __V850_IRQ_H__
  15 #define __V850_IRQ_H__
  16
  17 #include <asm/machdep.h>
  18
  19 /* Default NUM_MACH_IRQS.  */
  20 #ifndef NUM_MACH_IRQS
  21 #define NUM_MACH_IRQS   NUM_CPU_IRQS
  22 #endif
  23
  24 /* NMIs have IRQ numbers from FIRST_NMI to FIRST_NMI+NUM_NMIS-1.  */
  25 #define FIRST_NMI       NUM_MACH_IRQS
  26 #define IRQ_NMI(n)      (FIRST_NMI + (n))
  27 /* v850 processors have 3 non-maskable interrupts.  */
  28 #define NUM_NMIS        3
  29
  30 /* Includes both maskable and non-maskable irqs.  */
  31 #define NR_IRQS         (NUM_MACH_IRQS + NUM_NMIS)
  32
  33
  34 #ifndef __ASSEMBLY__
  35
  36 struct pt_regs;
  37 struct hw_interrupt_type;
  38 struct irqaction;
  39
  40 #define irq_canonicalize(irq)   (irq)
  41
  42 /* Initialize irq handling for IRQs.
  43    BASE_IRQ, BASE_IRQ+INTERVAL, ..., BASE_IRQ+NUM*INTERVAL
  44    to IRQ_TYPE.  An IRQ_TYPE of 0 means to use a generic interrupt type.  */
  45 extern void
  46 init_irq_handlers (int base_irq, int num, int interval,
  47                    struct hw_interrupt_type *irq_type);
  48
  49 typedef void (*irq_handler_t)(int irq, void *data, struct pt_regs *regs);
  50
  51 /* Handle interrupt IRQ.  REGS are the registers at the time of ther
  52    interrupt.  */
  53 extern unsigned int handle_irq (int irq, struct pt_regs *regs);
  54
  55
  56 /* Enable interrupt handling on an irq.  */
  57 extern void enable_irq(unsigned int irq);
  58
  59 /* Disable an irq and wait for completion.  */
  60 extern void disable_irq (unsigned int irq);
  61
  62 /* Disable an irq without waiting. */
  63 extern void disable_irq_nosync (unsigned int irq);
  64
  65 #endif /* !__ASSEMBLY__ */
  66
  67 #endif /* __V850_IRQ_H__ */