1/* $NetBSD: intr.h,v 1.22 2021/06/05 21:24:17 christos Exp $ */
2
3/*
4 * Copyright (c) 1997 Mark Brinicombe.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Mark Brinicombe
18 * for the NetBSD Project.
19 * 4. The name of the company nor the name of the author may be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef _HPCARM_INTR_H_
37#define _HPCARM_INTR_H_
38
39#ifdef _KERNEL
40
41#define IPL_NONE 0
42#define IPL_SOFTCLOCK 1
43#define IPL_SOFTBIO 2
44#define IPL_SOFTNET 3
45#define IPL_SOFTSERIAL 4
46#define IPL_VM 5
47#define IPL_SCHED 6
48#define IPL_HIGH 7
49
50#define NIPL 8
51
52#define IST_UNUSABLE -1 /* interrupt cannot be used */
53#define IST_NONE 0 /* none (dummy) */
54#define IST_PULSE 1 /* pulsed */
55#define IST_EDGE 2 /* edge-triggered */
56#define IST_LEVEL 3 /* level-triggered */
57
58#define IST_LEVEL_LOW IST_LEVEL
59#define IST_LEVEL_HIGH 4
60#define IST_EDGE_FALLING IST_EDGE
61#define IST_EDGE_RISING 5
62#define IST_EDGE_BOTH 6
63
64#ifdef __OLD_INTERRUPT_CODE /* XXX XXX XXX */
65
66#include <machine/irqhandler.h>
67#include <arm/arm32/psl.h>
68
69#else /* !__OLD_INTERRUPT_CODE */
70
71#ifndef _LOCORE
72
73#include <sys/queue.h>
74
75#if defined(_MODULE)
76
77int _splraise(int);
78int _spllower(int);
79void splx(int);
80
81#else /* _MODULE */
82
83#include "opt_arm_intr_impl.h"
84
85#if defined(ARM_INTR_IMPL)
86
87/*
88 * Each board needs to define the following functions:
89 *
90 * int _splraise(int);
91 * int _spllower(int);
92 * void splx(int);
93 * void _setsoftintr(int);
94 *
95 * These may be defined as functions, static inline functions, or macros,
96 * but there must be a _spllower() and splx() defined as functions callable
97 * from assembly language (for cpu_switch()). However, since it's quite
98 * useful to be able to inline splx(), you could do something like the
99 * following:
100 *
101 * in <boardtype>_intr.h:
102 * static inline int
103 * boardtype_splx(int spl)
104 * {...}
105 *
106 * #define splx(nspl) boardtype_splx(nspl)
107 * ...
108 * and in boardtype's machdep code:
109 *
110 * ...
111 * #undef splx
112 * int
113 * splx(int spl)
114 * {
115 * return boardtype_splx(spl);
116 * }
117 */
118
119#include ARM_INTR_IMPL
120
121#else /* ARM_INTR_IMPL */
122
123#error ARM_INTR_IMPL not defined.
124
125#endif /* ARM_INTR_IMPL */
126
127#endif /* _MODULE */
128
129typedef uint8_t ipl_t;
130typedef struct {
131 ipl_t _ipl;
132} ipl_cookie_t;
133
134static inline ipl_cookie_t
135makeiplcookie(ipl_t ipl)
136{
137
138 return (ipl_cookie_t){._ipl = ipl};
139}
140
141static inline int
142splraiseipl(ipl_cookie_t icookie)
143{
144
145 return _splraise(icookie._ipl);
146}
147
148#define spl0() _spllower(IPL_NONE)
149
150#include <sys/spl.h>
151
152#endif /* ! _LOCORE */
153
154#endif /* __OLD_INTERRUPT_CODE */
155
156#endif /* _KERNEL */
157
158#endif /* _HPCARM_INTR_H */