intr.h revision 1.26 
1/*	$NetBSD: intr.h,v 1.26 2011/03/06 14:54:47 tsutsui Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Minoura Makoto and 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 _NEWS68K_INTR_H_
33#define	_NEWS68K_INTR_H_
34
35#include <sys/evcnt.h>
36#include <sys/queue.h>
37#include <machine/psl.h>
38#include <m68k/asm_single.h>
39
40#define	IPL_NONE	0
41#define	IPL_SOFTCLOCK	1
42#define	IPL_SOFTBIO	2
43#define	IPL_SOFTNET	3
44#define	IPL_SOFTSERIAL	4
45#define	IPL_VM		5
46#define	IPL_SCHED	6
47#define	IPL_HIGH	7
48#define	NIPL		8
49
50extern int idepth;
51
52static inline bool
53cpu_intr_p(void)
54{
55
56	return idepth != 0;
57}
58
59extern const uint16_t ipl2psl_table[NIPL];
60
61typedef int ipl_t;
62typedef struct {
63	uint16_t _psl;
64} ipl_cookie_t;
65
66static inline ipl_cookie_t
67makeiplcookie(ipl_t ipl)
68{
69
70	return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
71}
72
73static inline int
74splraiseipl(ipl_cookie_t icookie)
75{
76
77	return _splraise(icookie._psl);
78}
79
80static inline void
81splx(int sr)
82{
83
84	__asm volatile("movw %0,%%sr" : : "di" (sr));
85}
86
87/*
88 * news68k can handle software interrupts by its own hardware
89 * so has no need to check for any simulated interrupts, etc.
90 */
91#define	spl0()		_spl0()
92
93#define	splsoftbio()	splraise2()
94#define	splsoftclock()	splraise2()
95#define	splsoftnet()	splraise2()
96#define	splsoftserial()	splraise2()
97#define	splvm()		splraise5()
98#define	splhigh()	spl7()
99#define	splsched()	spl7()
100
101#endif /* _NEWS68K_INTR_H_ */
102