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