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_PC164)     || \
35      defined(CONFIG_ALPHA_LX164)
36# define NR_IRQS	35
37
38#elif defined(CONFIG_ALPHA_MIKASA)
39# define NR_IRQS	32
40
41#elif defined(CONFIG_ALPHA_ALCOR)     || \
42      defined(CONFIG_ALPHA_MIATA)     || \
43      defined(CONFIG_ALPHA_RUFFIAN)   || \
44      defined(CONFIG_ALPHA_RX164)     || \
45      defined(CONFIG_ALPHA_NORITAKE)
46# define NR_IRQS	48
47
48#elif defined(CONFIG_ALPHA_SABLE)     || \
49      defined(CONFIG_ALPHA_SX164)
50# define NR_IRQS	40
51
52#elif defined(CONFIG_ALPHA_DP264) || \
53      defined(CONFIG_ALPHA_SHARK)
54# define NR_IRQS	64
55
56#elif defined(CONFIG_ALPHA_TITAN)
57#define NR_IRQS		80
58
59#elif defined(CONFIG_ALPHA_RAWHIDE) || \
60      defined(CONFIG_ALPHA_TAKARA) || \
61      defined(CONFIG_ALPHA_EIGER)
62# define NR_IRQS	128
63
64#elif defined(CONFIG_ALPHA_WILDFIRE)
65# define NR_IRQS	2048 /* enuff for 8 QBBs */
66
67#elif defined(CONFIG_ALPHA_MARVEL)
68# define NR_IRQS	(32768 + 16) 	/* marvel - 32 pids*/
69
70#else /* everyone else */
71# define NR_IRQS	16
72#endif
73
74static __inline__ int irq_canonicalize(int irq)
75{
76	/*
77	 * XXX is this true for all Alpha's?  The old serial driver
78	 * did it this way for years without any complaints, so....
79	 */
80	return ((irq == 2) ? 9 : irq);
81}
82
83struct pt_regs;
84extern void (*perf_irq)(unsigned long, struct pt_regs *);
85
86#endif /* _ALPHA_IRQ_H */