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