include/asm-alpha/irq.h

   1 #ifndef _ALPHA_IRQ_H
   2 #define _ALPHA_IRQ_H
   3
   4 /*
   5  *      linux/include/alpha/irq.h
   6  *
   7  *      (C) 1994 Linus Torvalds
   8  */
   9
  10 #include <linux/linkage.h>
  11 #include <linux/config.h>
  12
  13 #if   defined(CONFIG_ALPHA_GENERIC)
  14
  15 /* Here NR_IRQS is not exact, but rather an upper bound.  This is used
  16    many places throughout the kernel to size static arrays.  That's ok,
  17    we'll use alpha_mv.nr_irqs when we want the real thing.  */
  18
  19 /* When LEGACY_START_ADDRESS is selected, we leave out:
  20      TITAN
  21      WILDFIRE
  22      MARVEL
  23
  24    This helps keep the kernel object size reasonable for the majority
  25    of machines.
  26 */
  27
  28 # if defined(CONFIG_ALPHA_LEGACY_START_ADDRESS)
  29 #  define NR_IRQS      (128)           /* max is RAWHIDE/TAKARA */
  30 # else
  31 #  define NR_IRQS      (32768 + 16)    /* marvel - 32 pids */
  32 # endif
  33
  34 #elif defined(CONFIG_ALPHA_CABRIOLET) || \
  35       defined(CONFIG_ALPHA_EB66P)     || \
  36       defined(CONFIG_ALPHA_EB164)     || \
  37       defined(CONFIG_ALPHA_PC164)     || \
  38       defined(CONFIG_ALPHA_LX164)
  39 # define NR_IRQS        35
  40
  41 #elif defined(CONFIG_ALPHA_EB66)      || \
  42       defined(CONFIG_ALPHA_EB64P)     || \
  43       defined(CONFIG_ALPHA_MIKASA)
  44 # define NR_IRQS        32
  45
  46 #elif defined(CONFIG_ALPHA_ALCOR)     || \
  47       defined(CONFIG_ALPHA_MIATA)     || \
  48       defined(CONFIG_ALPHA_RUFFIAN)   || \
  49       defined(CONFIG_ALPHA_RX164)     || \
  50       defined(CONFIG_ALPHA_NORITAKE)
  51 # define NR_IRQS        48
  52
  53 #elif defined(CONFIG_ALPHA_SABLE)     || \
  54       defined(CONFIG_ALPHA_SX164)
  55 # define NR_IRQS        40
  56
  57 #elif defined(CONFIG_ALPHA_DP264) || \
  58       defined(CONFIG_ALPHA_LYNX)  || \
  59       defined(CONFIG_ALPHA_SHARK) || \
  60       defined(CONFIG_ALPHA_EIGER)
  61 # define NR_IRQS        64
  62
  63 #elif defined(CONFIG_ALPHA_TITAN)
  64 #define NR_IRQS         80
  65
  66 #elif defined(CONFIG_ALPHA_RAWHIDE) || \
  67         defined(CONFIG_ALPHA_TAKARA)
  68 # define NR_IRQS        128
  69
  70 #elif defined(CONFIG_ALPHA_WILDFIRE)
  71 # define NR_IRQS        2048 /* enuff for 8 QBBs */
  72
  73 #elif defined(CONFIG_ALPHA_MARVEL)
  74 # define NR_IRQS        (32768 + 16)    /* marvel - 32 pids*/
  75
  76 #else /* everyone else */
  77 # define NR_IRQS        16
  78 #endif
  79
  80 static __inline__ int irq_canonicalize(int irq)
  81 {
  82         /*
  83          * XXX is this true for all Alpha's?  The old serial driver
  84          * did it this way for years without any complaints, so....
  85          */
  86         return ((irq == 2) ? 9 : irq);
  87 }
  88
  89 extern void disable_irq(unsigned int);
  90 extern void disable_irq_nosync(unsigned int);
  91 extern void enable_irq(unsigned int);
  92
  93 struct pt_regs;
  94 extern void (*perf_irq)(unsigned long, struct pt_regs *);
  95
  96 struct irqaction;
  97 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
  98
  99
 100 #endif /* _ALPHA_IRQ_H */