intr.h revision 1.18 
1/*	$NetBSD: intr.h,v 1.18 2007/12/03 15:33:32 ad 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	_EVBARM_INTR_H_
39#define	_EVBARM_INTR_H_
40
41#ifdef _KERNEL
42
43/* Interrupt priority "levels". */
44#define	IPL_NONE	0	/* nothing */
45#define	IPL_SOFTCLOCK	1	/* clock */
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#ifdef __OLD_INTERRUPT_CODE	/* XXX XXX XXX */
68
69/* Software interrupt priority levels */
70
71#define SOFTIRQ_CLOCK   0
72#define SOFTIRQ_BIO     1
73#define SOFTIRQ_NET     2
74#define SOFTIRQ_SERIAL  3
75
76#define SOFTIRQ_BIT(x)  (1 << x)
77
78#include <arm/arm32/psl.h>
79
80#else /* ! __OLD_INTERRUPT_CODE */
81
82#define	__NEWINTR	/* enables new hooks in cpu_fork()/cpu_switch() */
83
84#ifndef _LOCORE
85
86#include <sys/device.h>
87#include <sys/queue.h>
88
89#if defined(_LKM)
90
91int	_splraise(int);
92int	_spllower(int);
93void	splx(int);
94void	_setsoftintr(int);
95
96#else	/* _LKM */
97
98#include "opt_arm_intr_impl.h"
99
100#if defined(ARM_INTR_IMPL)
101
102/*
103 * Each board needs to define the following functions:
104 *
105 * int	_splraise(int);
106 * int	_spllower(int);
107 * void	splx(int);
108 * void	_setsoftintr(int);
109 *
110 * These may be defined as functions, static inline functions, or macros,
111 * but there must be a _spllower() and splx() defined as functions callable
112 * from assembly language (for cpu_switch()).  However, since it's quite
113 * useful to be able to inline splx(), you could do something like the
114 * following:
115 *
116 * in <boardtype>_intr.h:
117 * 	static inline int
118 *	boardtype_splx(int spl)
119 *	{...}
120 *
121 *	#define splx(nspl)	boardtype_splx(nspl)
122 *	...
123 * and in boardtype's machdep code:
124 *
125 *	...
126 *	#undef splx
127 *	int
128 *	splx(int spl)
129 *	{
130 *		return boardtype_splx(spl);
131 *	}
132 */
133
134#include ARM_INTR_IMPL
135
136#else /* ARM_INTR_IMPL */
137
138#error ARM_INTR_IMPL not defined.
139
140#endif	/* ARM_INTR_IMPL */
141
142#endif /* _LKM */
143
144#define	splsoft()	_splraise(IPL_SOFT)
145
146typedef uint8_t ipl_t;
147typedef struct {
148	ipl_t _ipl;
149} ipl_cookie_t;
150
151static inline ipl_cookie_t
152makeiplcookie(ipl_t ipl)
153{
154
155	return (ipl_cookie_t){._ipl = ipl};
156}
157
158static inline int
159splraiseipl(ipl_cookie_t icookie)
160{
161
162	return _splraise(icookie._ipl);
163}
164
165#define	spl0()		_spllower(IPL_NONE)
166
167#include <sys/spl.h>
168
169/* Use generic software interrupt support. */
170#include <arm/softintr.h>
171
172#endif /* ! _LOCORE */
173
174#endif /* __OLD_INTERRUPT_CODE */
175
176#endif /* _KERNEL */
177
178#endif	/* _EVBARM_INTR_H_ */
179