intr.h revision 1.32 
1/*	$NetBSD: intr.h,v 1.32 2023/07/11 17:55:04 riastradh 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#if defined(_KERNEL) || defined(_KMEMUSER)
36typedef struct {
37	uint16_t _ipl;
38} ipl_cookie_t;
39#endif
40
41#ifdef _KERNEL
42
43/* spl0 requires checking for software interrupts */
44
45#define	IPL_NONE	0
46#define	IPL_SOFTCLOCK	1
47#define	IPL_SOFTBIO	2
48#define	IPL_SOFTNET	3
49#define	IPL_SOFTSERIAL	4
50#define	IPL_VM		5
51#define	IPL_SCHED	6
52#define	IPL_HIGH	7
53#define	NIPL		8
54
55/*
56 * This array contains the appropriate PSL_S|PSL_IPL? values
57 * to raise interrupt priority to the requested level.
58 */
59extern uint16_t ipl2psl_table[NIPL];
60
61/* These spl calls are _not_ to be used by machine-independent code. */
62#define	splzs()		splserial()
63
64/*
65 * These should be used for:
66 * 1) ensuring mutual exclusion (why use processor level?)
67 * 2) allowing faster devices to take priority
68 */
69
70/* watch out for side effects */
71#define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())
72
73
74typedef int ipl_t;
75
76static inline ipl_cookie_t
77makeiplcookie(ipl_t ipl)
78{
79
80	return (ipl_cookie_t){._ipl = ipl};
81}
82
83static inline int
84splraiseipl(ipl_cookie_t icookie)
85{
86
87	return _splraise(ipl2psl_table[icookie._ipl]);
88}
89
90#include <sys/spl.h>
91
92/* intr.c */
93void	intr_init(void);
94void	intr_establish(int (*)(void *), void *, int);
95void	intr_disestablish(int);
96void	intr_dispatch(int);
97
98/* locore.s */
99int	spl0(void);
100#endif /* _KERNEL */
101
102#endif /* _MAC68K_INTR_H_ */
103