1 /* $NetBSD: intr.h,v 1.33 2024/02/28 13:05:40 thorpej 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)
36 typedef 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 */
59 extern 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
74 typedef int ipl_t;
75
76 static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)77 makeiplcookie(ipl_t ipl)
78 {
79
80 return (ipl_cookie_t){._ipl = ipl};
81 }
82
83 static inline int
splraiseipl(ipl_cookie_t icookie)84 splraiseipl(ipl_cookie_t icookie)
85 {
86
87 return _splraise(ipl2psl_table[icookie._ipl]);
88 }
89
90 #include <sys/spl.h>
91
92 /* intr.c */
93 struct clockframe;
94 void intr_init(void);
95 void intr_establish(int (*)(void *), void *, int);
96 void intr_disestablish(int);
97 void intr_dispatch(struct clockframe);
98
99 /* locore.s */
100 int spl0(void);
101 #endif /* _KERNEL */
102
103 #endif /* _MAC68K_INTR_H_ */
104