LXR linux/arch/alpha/include/asm/irq.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ALPHA_IRQ_H
   3#define _ALPHA_IRQ_H
   4
   5/*
   6 *      linux/include/alpha/irq.h
   7 *
   8 *      (C) 1994 Linus Torvalds
   9 */
  10
  11#include <linux/linkage.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# 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      defined(CONFIG_ALPHA_EIGER)
  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
  80static __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
  89struct pt_regs;
  90extern void (*perf_irq)(unsigned long, struct pt_regs *);
  91
  92#endif /* _ALPHA_IRQ_H */
  93