Annotation of sys/arch/arm/include/softintr.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: softintr.h,v 1.2 2007/05/10 17:59:24 deraadt Exp $ */
2: /* $NetBSD: softintr.h,v 1.1 2002/01/29 22:54:14 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 2001 Wasabi Systems, Inc.
6: * All rights reserved.
7: *
8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
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: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed for the NetBSD Project by
21: * Wasabi Systems, Inc.
22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: #ifndef _ARM_SOFTINTR_H_
40: #define _ARM_SOFTINTR_H_
41:
42: #ifdef _KERNEL
43:
44: /*
45: * Generic software interrupt support for all ARM platforms.
46: *
47: * To use this code, include <arm/softintr.h> from your platform's
48: * <machine/intr.h>.
49: */
50:
51: #define SI_SOFT 0 /* for IPL_SOFT */
52: #define SI_SOFTCLOCK 1 /* for IPL_SOFTCLOCK */
53: #define SI_SOFTNET 2 /* for IPL_SOFTNET */
54: #define SI_SOFTSERIAL 3 /* for IPL_SOFTSERIAL */
55:
56: #define SI_NQUEUES 4
57:
58: #define SI_QUEUENAMES { \
59: "generic", \
60: "clock", \
61: "net", \
62: "serial", \
63: }
64:
65: struct soft_intrhand {
66: TAILQ_ENTRY(soft_intrhand) sih_list;
67: void (*sih_func)(void *);
68: void *sih_arg;
69: struct soft_intrq *sih_siq;
70: int sih_pending;
71: };
72:
73: struct soft_intrq {
74: TAILQ_HEAD(, soft_intrhand) siq_list;
75: int siq_si;
76: };
77:
78: void *softintr_establish(int, void (*)(void *), void *);
79: void softintr_disestablish(void *);
80: void softintr_init(void);
81: void softintr_dispatch(int);
82:
83: #define softintr_schedule(arg) \
84: do { \
85: struct soft_intrhand *__sih = (arg); \
86: struct soft_intrq *__siq = __sih->sih_siq; \
87: int __s; \
88: \
89: __s = splhigh(); \
90: if (__sih->sih_pending == 0) { \
91: TAILQ_INSERT_TAIL(&__siq->siq_list, __sih, sih_list); \
92: __sih->sih_pending = 1; \
93: _setsoftintr(__siq->siq_si); \
94: } \
95: splx(__s); \
96: } while (/*CONSTCOND*/0)
97:
98: /* XXX For legacy software interrupts. */
99: extern struct soft_intrhand *softnet_intrhand;
100:
101: #define setsoftnet() softintr_schedule(softnet_intrhand)
102:
103: #endif /* _KERNEL */
104:
105: #endif /* _ARM_SOFTINTR_H_ */
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