intr.h revision 1.16 
1/*	$NetBSD: intr.h,v 1.16 2007/02/16 02:53:49 ad Exp $	*/
2
3/*
4 *
5 * Copyright (c) 1998 NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Minoura Makoto and Jason R. Thorpe.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *      This product includes software developed by The NetBSD Foundation
22 *	Inc. and its contributers.
23 * 4. The name of the author may not be used to endorse or promote products
24 *    derived from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#ifndef _NEWS68K_INTR_H_
39#define	_NEWS68K_INTR_H_
40
41#include <sys/device.h>
42#include <sys/queue.h>
43#include <machine/psl.h>
44#include <m68k/asm_single.h>
45
46#ifdef _KERNEL
47#define	IPL_NONE	0
48#define	IPL_SOFTCLOCK	1
49#define	IPL_SOFTNET	2
50#define	IPL_SOFTSERIAL	3
51#define	IPL_SOFT	4
52#define	IPL_BIO		5
53#define	IPL_NET		6
54#define	IPL_TTY		7
55#define	IPL_VM		8
56#define	IPL_SERIAL	9
57#define	IPL_CLOCK	10
58#define	IPL_STATCLOCK	IPL_CLOCK
59#define	IPL_HIGH	11
60#define	IPL_SCHED	IPL_HIGH
61#define	IPL_LOCK	IPL_HIGH
62#define	NIPL		12
63
64#define	SI_SOFTSERIAL	0
65#define	SI_SOFTNET	1
66#define	SI_SOFTCLOCK	2
67#define	SI_SOFT		3
68
69#define	SI_NQUEUES	4
70
71#define	SI_QUEUENAMES {							\
72	"serial",							\
73	"net",								\
74	"clock",							\
75	"misc",								\
76}
77
78typedef int ipl_t;
79typedef struct {
80	ipl_t _psl;
81} ipl_cookie_t;
82
83ipl_cookie_t makeiplcookie(ipl_t);
84
85static inline int
86splraiseipl(ipl_cookie_t icookie)
87{
88
89	return _splraise(icookie._psl);
90}
91
92static __inline void
93splx(int sr)
94{
95
96	__asm volatile("movw %0,%%sr" : : "di" (sr));
97}
98
99/*
100 * news68k can handle software interrupts by its own hardware
101 * so has no need to check for any simulated interrupts, etc.
102 */
103#define	spl0()		_spl0()
104
105#define	splsoft()	splraise2()
106#define	splsoftclock()	splsoft()
107#define	splsoftnet()	splsoft()
108#define	splsoftserial()	splsoft()
109#define	splbio()	splraise4()
110#define	splnet()	splraise4()
111#define	spltty()	splraise5()
112#define	splvm()		splraise5()
113#define	splserial()	splraise5()
114#define	splclock()	splraise6()
115#define	splstatclock()	splclock()
116#define	splhigh()	spl7()
117#define	splsched()	spl7()
118#define	spllock()	spl7()
119
120/*
121 * simulated software interrupt register
122 */
123#define SOFTINTR_IPL	2
124extern volatile uint8_t *ctrl_int2;
125
126#define	setsoft(x)		(x = 0)
127#define	softintr_assert()	(*ctrl_int2 = 0xff)
128#define	softintr_clear()	(*ctrl_int2 = 0)
129
130struct news68k_soft_intrhand {
131	LIST_ENTRY(news68k_soft_intrhand) sih_q;
132	struct news68k_soft_intr *sih_intrhead;
133	void (*sih_fn)(void *);
134	void *sih_arg;
135	volatile int sih_pending;
136};
137
138struct news68k_soft_intr {
139	LIST_HEAD(, news68k_soft_intrhand) nsi_q;
140	struct evcnt nsi_evcnt;
141	volatile unsigned char nsi_ssir;
142};
143
144void *softintr_establish(int, void (*)(void *), void *);
145void softintr_disestablish(void *);
146void softintr_init(void);
147void softintr_dispatch(void);
148
149#define	softintr_schedule(arg)					\
150	do {							\
151		struct news68k_soft_intrhand *__sih = (arg);	\
152		__sih->sih_pending = 1;				\
153		setsoft(__sih->sih_intrhead->nsi_ssir);		\
154		softintr_assert();				\
155	} while (/*CONSTCOND*/ 0)
156
157/* XXX For legacy software interrupts */
158extern struct news68k_soft_intrhand *softnet_intrhand;
159
160#define	setsoftnet()	softintr_schedule(softnet_intrhand)
161
162#endif /* _KERNEL */
163
164#endif /* _NEWS68K_INTR_H_ */
165