1 /* $NetBSD: intr.h,v 1.12 2020/07/27 12:32:54 skrll 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 _IYONIX_INTR_H_
39 #define _IYONIX_INTR_H_
40
41 #ifdef _KERNEL
42
43 /* Interrupt priority "levels". */
44 #define IPL_NONE 0 /* nothing */
45 #define IPL_SOFTCLOCK 1 /* software clock interrupt */
46 #define IPL_SOFTBIO 2 /* generic software interrupts */
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 /* scheduler */
51 #define IPL_HIGH 6 /* everything */
52
53 #define NIPL 7
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 #if defined(_MODULE)
70
71 int _splraise(int);
72 int _spllower(int);
73 void splx(int);
74
75 #else /* _MODULE */
76
77 #include "opt_arm_intr_impl.h"
78
79 #if defined(ARM_INTR_IMPL)
80
81 /*
82 * Each board needs to define the following functions:
83 *
84 * int _splraise(int);
85 * int _spllower(int);
86 * void splx(int);
87 * void _setsoftintr(int);
88 *
89 * These may be defined as functions, static inline functions, or macros,
90 * but there must be a _spllower() and splx() defined as functions callable
91 * from assembly language (for cpu_switch()). However, since it's quite
92 * useful to be able to inline splx(), you could do something like the
93 * following:
94 *
95 * in <boardtype>_intr.h:
96 * static inline int
97 * boardtype_splx(int spl)
98 * {...}
99 *
100 * #define splx(nspl) boardtype_splx(nspl)
101 * ...
102 * and in boardtype's machdep code:
103 *
104 * ...
105 * #undef splx
106 * int
107 * splx(int spl)
108 * {
109 * return boardtype_splx(spl);
110 * }
111 */
112
113 #include ARM_INTR_IMPL
114
115 #else /* ARM_INTR_IMPL */
116
117 #error ARM_INTR_IMPL not defined.
118
119 #endif /* ARM_INTR_IMPL */
120
121 #endif /* _MODULE */
122
123 typedef uint8_t ipl_t;
124 typedef struct {
125 ipl_t _ipl;
126 } ipl_cookie_t;
127
128 static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)129 makeiplcookie(ipl_t ipl)
130 {
131
132 return (ipl_cookie_t){._ipl = ipl};
133 }
134
135 static inline int
splraiseipl(ipl_cookie_t icookie)136 splraiseipl(ipl_cookie_t icookie)
137 {
138
139 return _splraise(icookie._ipl);
140 }
141
142 #define spl0() _spllower(IPL_NONE)
143
144 #include <sys/spl.h>
145
146 #endif /* ! _LOCORE */
147
148 #endif /* _KERNEL */
149
150 #endif /* _IYONIX_INTR_H_ */
151