xref: /netbsd-src/sys/arch/hp300/include/intr.h (revision 2980e352a13e8f0b545a366830c411e7a542ada8)
1 /*	$NetBSD: intr.h,v 1.31 2008/06/22 17:35:14 tsutsui Exp $	*/
2 
3 /*-
4  * Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Jason R. Thorpe.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #ifndef _HP300_INTR_H_
33 #define	_HP300_INTR_H_
34 
35 #include <sys/device.h>
36 #include <sys/queue.h>
37 #include <machine/psl.h>
38 
39 /*
40  * Interrupt "levels".  These are a more abstract representation
41  * of interrupt levels, and do not have the same meaning as m68k
42  * CPU interrupt levels.  They serve the following purposes:
43  *
44  *	- properly order ISRs in the list for that CPU ipl
45  *	- compute CPU PSL values for the spl*() calls.
46  *	- used to create cookie for the splraiseipl().
47  */
48 #define	IPL_NONE	0
49 #define	IPL_SOFTCLOCK	1
50 #define	IPL_SOFTBIO	2
51 #define	IPL_SOFTNET	3
52 #define	IPL_SOFTSERIAL	4
53 #define	IPL_VM		5
54 #define	IPL_SCHED	6
55 #define	IPL_HIGH	7
56 #define	NIPL		8
57 
58 /*
59  * Convert PSL values to m68k CPU IPLs and vice-versa.
60  * Note: CPU IPL values are different from IPL_* used by splraiseipl().
61  */
62 #define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
63 #define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)
64 
65 extern int idepth;
66 
67 static inline bool
68 cpu_intr_p(void)
69 {
70 
71 	return idepth != 0;
72 }
73 
74 extern const uint16_t ipl2psl_table[NIPL];
75 
76 typedef int ipl_t;
77 typedef struct {
78 	uint16_t _psl;
79 } ipl_cookie_t;
80 
81 static inline ipl_cookie_t
82 makeiplcookie(ipl_t ipl)
83 {
84 
85 	return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
86 }
87 
88 static inline int
89 splraiseipl(ipl_cookie_t icookie)
90 {
91 
92 	return _splraise(icookie._psl);
93 }
94 
95 /* These spl calls are _not_ to be used by machine-independent code. */
96 #define	splhil()	splraise1()
97 #define	splkbd()	splhil()
98 
99 /* These spl calls are used by machine-independent code. */
100 /* spl0 requires checking for software interrupts */
101 #define	splsoftbio()	splraise1()
102 #define	splsoftclock()	splraise1()
103 #define	splsoftnet()	splraise1()
104 #define	splsoftserial()	splraise1()
105 #define	splvm()		splraise5()
106 #define	splsched()	spl6()
107 #define	splhigh()	spl7()
108 
109 /* watch out for side effects */
110 #define	splx(s)		((s) & PSL_IPL ? _spl((s)) : spl0())
111 
112 struct hp300_intrhand {
113 	LIST_ENTRY(hp300_intrhand) ih_q;
114 	int (*ih_fn)(void *);
115 	void *ih_arg;
116 	int ih_ipl;
117 	int ih_priority;
118 };
119 
120 struct hp300_intr {
121 	LIST_HEAD(, hp300_intrhand) hi_q;
122 	struct evcnt hi_evcnt;
123 };
124 
125 /* locore.s */
126 int	spl0(void);
127 
128 /* intr.c */
129 void	intr_init(void);
130 void	*intr_establish(int (*)(void *), void *, int, int);
131 void	intr_disestablish(void *);
132 void	intr_dispatch(int);
133 
134 #endif /* _HP300_INTR_H_ */
135