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Linux kernel mirror (for testing)
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linux
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 */