intr.h revision 1.16 
1/* 	$NetBSD: intr.h,v 1.16 2012/06/10 13:15:24 skrll 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(_LKM)
76
77int	_splraise(int);
78int	_spllower(int);
79void	splx(int);
80void	_setsoftintr(int);
81
82#else	/* _LKM */
83
84#include "opt_arm_intr_impl.h"
85
86#if defined(ARM_INTR_IMPL)
87
88/*
89 * Each board needs to define the following functions:
90 *
91 * int	_splraise(int);
92 * int	_spllower(int);
93 * void	splx(int);
94 * void	_setsoftintr(int);
95 *
96 * These may be defined as functions, static inline functions, or macros,
97 * but there must be a _spllower() and splx() defined as functions callable
98 * from assembly language (for cpu_switch()).  However, since it's quite
99 * useful to be able to inline splx(), you could do something like the
100 * following:
101 *
102 * in <boardtype>_intr.h:
103 * 	static inline int
104 *	boardtype_splx(int spl)
105 *	{...}
106 *
107 *	#define splx(nspl)	boardtype_splx(nspl)
108 *	...
109 * and in boardtype's machdep code:
110 *
111 *	...
112 *	#undef splx
113 *	int
114 *	splx(int spl)
115 *	{
116 *		return boardtype_splx(spl);
117 *	}
118 */
119
120#include ARM_INTR_IMPL
121
122#else	/* ARM_INTR_IMPL */
123
124#error ARM_INTR_IMPL not defined.
125
126#endif	/* ARM_INTR_IMPL */
127
128#endif	/* _LKM */
129
130#define splsoft()	_splraise(IPL_SOFT)
131
132typedef uint8_t ipl_t;
133typedef struct {
134	ipl_t _ipl;
135} ipl_cookie_t;
136
137static inline ipl_cookie_t
138makeiplcookie(ipl_t ipl)
139{
140
141	return (ipl_cookie_t){._ipl = ipl};
142}
143
144static inline int
145splraiseipl(ipl_cookie_t icookie)
146{
147
148	return _splraise(icookie._ipl);
149}
150
151#define	spl0()		_spllower(IPL_NONE)
152
153#include <sys/spl.h>
154
155#endif	/* ! _LOCORE */
156
157#endif	/* __OLD_INTERRUPT_CODE */
158
159#endif	/* _KERNEL */
160
161#endif	/* _HPCARM_INTR_H */
162