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Annotation of sys/arch/arm/include/softintr.h, Revision 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_ */