1/* $NetBSD: intr.h,v 1.12 2021/06/05 21:24:17 christos Exp $ */
2
3/*
4 * Copyright (c) 2001, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#ifndef _ZAURUS_INTR_H_
39#define _ZAURUS_INTR_H_
40
41#ifdef _KERNEL
42
43/* Interrupt priority "levels". */
44#define IPL_NONE 0 /* nothing */
45#define IPL_SOFTCLOCK 1 /* timeouts */
46#define IPL_SOFTBIO 2 /* block I/O */
47#define IPL_SOFTNET 3 /* software network interrupt */
48#define IPL_SOFTSERIAL 4 /* software serial interrupt */
49#define IPL_VM 5 /* memory allocation */
50#define IPL_SCHED 6 /* clock interrupt */
51#define IPL_HIGH 7 /* everything */
52
53#define NIPL 8
54
55/* Interrupt sharing types. */
56#define IST_NONE 0 /* none */
57#define IST_PULSE 1 /* pulsed */
58#define IST_EDGE 2 /* edge-triggered */
59#define IST_LEVEL 3 /* level-triggered */
60
61#define IST_LEVEL_LOW IST_LEVEL
62#define IST_LEVEL_HIGH 4
63#define IST_EDGE_FALLING IST_EDGE
64#define IST_EDGE_RISING 5
65#define IST_EDGE_BOTH 6
66
67#ifndef _LOCORE
68
69#include <sys/queue.h>
70
71#if defined(_MODULE)
72
73int _splraise(int);
74int _spllower(int);
75void splx(int);
76
77#else /* _MODULE */
78
79#include "opt_arm_intr_impl.h"
80
81#if defined(ARM_INTR_IMPL)
82
83/*
84 * Each board needs to define the following functions:
85 *
86 * int _splraise(int);
87 * int _spllower(int);
88 * void splx(int);
89 *
90 * These may be defined as functions, static inline functions, or macros,
91 * but there must be a _spllower() and splx() defined as functions callable
92 * from assembly language (for cpu_switch()). However, since it's quite
93 * useful to be able to inline splx(), you could do something like the
94 * following:
95 *
96 * in <boardtype>_intr.h:
97 * static inline int
98 * boardtype_splx(int spl)
99 * {...}
100 *
101 * #define splx(nspl) boardtype_splx(nspl)
102 * ...
103 * and in boardtype's machdep code:
104 *
105 * ...
106 * #undef splx
107 * int
108 * splx(int spl)
109 * {
110 * return boardtype_splx(spl);
111 * }
112 */
113
114#include ARM_INTR_IMPL
115
116#else /* ARM_INTR_IMPL */
117
118#error ARM_INTR_IMPL not defined.
119
120#endif /* ARM_INTR_IMPL */
121
122#endif /* _MODULE */
123
124typedef uint8_t ipl_t;
125typedef struct {
126 ipl_t _ipl;
127} ipl_cookie_t;
128
129static inline ipl_cookie_t
130makeiplcookie(ipl_t ipl)
131{
132
133 return (ipl_cookie_t){._ipl = ipl};
134}
135
136static inline int
137splraiseipl(ipl_cookie_t icookie)
138{
139
140 return _splraise(icookie._ipl);
141}
142
143#define spl0() _spllower(IPL_NONE)
144
145#include <sys/spl.h>
146
147#endif /* ! _LOCORE */
148
149#endif /* _KERNEL */
150
151#endif /* _ZAURUS_INTR_H_ */