1/*	$NetBSD: intr.h,v 1.30 2008/06/19 13:56:22 tsutsui Exp $	*/
2
3/*
4 * Copyright (C) 1997 Scott Reynolds
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. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef _MAC68K_INTR_H_
31#define _MAC68K_INTR_H_
32
33#include <machine/psl.h>
34
35#ifdef _KERNEL
36
37/* spl0 requires checking for software interrupts */
38
39#define	IPL_NONE	0
40#define	IPL_SOFTCLOCK	1
41#define	IPL_SOFTBIO	2
42#define	IPL_SOFTNET	3
43#define	IPL_SOFTSERIAL	4
44#define	IPL_VM		5
45#define	IPL_SCHED	6
46#define	IPL_HIGH	7
47#define	NIPL		8
48
49/*
50 * This array contains the appropriate PSL_S|PSL_IPL? values
51 * to raise interrupt priority to the requested level.
52 */
53extern uint16_t ipl2psl_table[NIPL];
54
55/* These spl calls are _not_ to be used by machine-independent code. */
56#define	splzs()		splserial()
57
58/*
59 * These should be used for:
60 * 1) ensuring mutual exclusion (why use processor level?)
61 * 2) allowing faster devices to take priority
62 */
63
64/* watch out for side effects */
65#define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())
66
67
68typedef int ipl_t;
69typedef struct {
70	uint16_t _ipl;
71} ipl_cookie_t;
72
73static inline ipl_cookie_t
74makeiplcookie(ipl_t ipl)
75{
76
77	return (ipl_cookie_t){._ipl = ipl};
78}
79
80static inline int
81splraiseipl(ipl_cookie_t icookie)
82{
83
84	return _splraise(ipl2psl_table[icookie._ipl]);
85}
86
87#include <sys/spl.h>
88
89/* intr.c */
90void	intr_init(void);
91void	intr_establish(int (*)(void *), void *, int);
92void	intr_disestablish(int);
93void	intr_dispatch(int);
94
95/* locore.s */
96int	spl0(void);
97#endif /* _KERNEL */
98
99#endif /* _MAC68K_INTR_H_ */
100