intr.h revision 1.20 
1/*	$NetBSD: intr.h,v 1.20 2008/04/27 18:58:46 matt 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#ifdef __HAVE_FAST_SOFTINTS
45#define	IPL_NONE	0		/* nothing */
46#define	IPL_SOFTCLOCK	1		/* clock */
47#define	IPL_SOFTBIO	2		/* block I/O */
48#define	IPL_SOFTNET	3		/* software network interrupt */
49#define	IPL_SOFTSERIAL	4		/* software serial interrupt */
50#define	IPL_VM		5		/* memory allocation */
51#define	IPL_SCHED	6		/* clock interrupt */
52#define	IPL_HIGH	7		/* everything */
53
54#define	NIPL		8
55#else
56#define	IPL_NONE	0		/* nothing */
57#define	IPL_SOFTCLOCK	IPL_NONE	/* clock */
58#define	IPL_SOFTBIO	IPL_NONE	/* block I/O */
59#define	IPL_SOFTNET	IPL_NONE	/* software network interrupt */
60#define	IPL_SOFTSERIAL	IPL_NONE	/* software serial interrupt */
61#define	IPL_VM		1		/* memory allocation */
62#define	IPL_SCHED	2		/* clock interrupt */
63#define	IPL_HIGH	3		/* everything */
64
65#define	NIPL		4
66#endif
67
68/* Interrupt sharing types. */
69#define	IST_NONE	0	/* none */
70#define	IST_PULSE	1	/* pulsed */
71#define	IST_EDGE	2	/* edge-triggered */
72#define	IST_LEVEL	3	/* level-triggered */
73
74#define IST_LEVEL_LOW	IST_LEVEL
75#define IST_LEVEL_HIGH	4
76#define IST_EDGE_FALLING IST_EDGE
77#define IST_EDGE_RISING	5
78#define IST_EDGE_BOTH	6
79#define IST_SOFT	7
80
81#ifdef __OLD_INTERRUPT_CODE	/* XXX XXX XXX */
82
83/* Software interrupt priority levels */
84
85#ifdef __HAVE_FAST_SOFTINTS
86#define SOFTIRQ_CLOCK   0
87#define SOFTIRQ_BIO     1
88#define SOFTIRQ_NET     2
89#define SOFTIRQ_SERIAL  3
90
91#define SOFTIRQ_BIT(x)  (1 << x)
92#endif
93
94#include <arm/arm32/psl.h>
95
96#else /* ! __OLD_INTERRUPT_CODE */
97
98#define	__NEWINTR	/* enables new hooks in cpu_fork()/cpu_switch() */
99
100#ifndef _LOCORE
101
102#include <sys/device.h>
103#include <sys/queue.h>
104
105#if defined(_LKM)
106
107int	_splraise(int);
108int	_spllower(int);
109void	splx(int);
110#ifdef __HAVE_FAST_SOFTINTS
111void	_setsoftintr(int);
112#endif
113
114#else	/* _LKM */
115
116#include "opt_arm_intr_impl.h"
117
118#if defined(ARM_INTR_IMPL)
119
120/*
121 * Each board needs to define the following functions:
122 *
123 * int	_splraise(int);
124 * int	_spllower(int);
125 * void	splx(int);
126 *
127 * These may be defined as functions, static inline functions, or macros,
128 * but there must be a _spllower() and splx() defined as functions callable
129 * from assembly language (for cpu_switch()).  However, since it's quite
130 * useful to be able to inline splx(), you could do something like the
131 * following:
132 *
133 * in <boardtype>_intr.h:
134 * 	static inline int
135 *	boardtype_splx(int spl)
136 *	{...}
137 *
138 *	#define splx(nspl)	boardtype_splx(nspl)
139 *	...
140 * and in boardtype's machdep code:
141 *
142 *	...
143 *	#undef splx
144 *	int
145 *	splx(int spl)
146 *	{
147 *		return boardtype_splx(spl);
148 *	}
149 */
150
151#include ARM_INTR_IMPL
152
153#else /* ARM_INTR_IMPL */
154
155#error ARM_INTR_IMPL not defined.
156
157#endif	/* ARM_INTR_IMPL */
158
159#endif /* _LKM */
160
161typedef uint8_t ipl_t;
162typedef struct {
163	ipl_t _ipl;
164} ipl_cookie_t;
165
166static inline ipl_cookie_t
167makeiplcookie(ipl_t ipl)
168{
169
170	return (ipl_cookie_t){._ipl = ipl};
171}
172
173static inline int
174splraiseipl(ipl_cookie_t icookie)
175{
176
177	return _splraise(icookie._ipl);
178}
179
180#define	spl0()		_spllower(IPL_NONE)
181
182#include <sys/spl.h>
183
184#endif /* ! _LOCORE */
185
186#endif /* __OLD_INTERRUPT_CODE */
187
188#endif /* _KERNEL */
189
190#endif	/* _EVBARM_INTR_H_ */
191