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Annotation of sys/arch/hp300/dev/dmavar.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: dmavar.h,v 1.7 2005/11/17 23:56:02 miod Exp $ */
        !             2: /*     $NetBSD: dmavar.h,v 1.9 1997/04/01 03:10:59 scottr Exp $        */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1997 Jason R. Thorpe.  All rights reserved.
        !             6:  * Copyright (c) 1982, 1990, 1993
        !             7:  *     The Regents of the University of California.  All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  * 3. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)dmavar.h    8.1 (Berkeley) 6/10/93
        !            34:  */
        !            35:
        !            36: #include <sys/queue.h>
        !            37:
        !            38: /* dmago flags */
        !            39: #define        DMAGO_BYTE      0x00    /* do byte (8 bit) transfers */
        !            40: #define        DMAGO_WORD      0x01    /* do word (16 bit) transfers */
        !            41: #define        DMAGO_LWORD     0x02    /* do longword (32 bit) transfers */
        !            42: #define        DMAGO_PRI       0x04    /* do "priority" DMA */
        !            43: #define        DMAGO_READ      0x08    /* transfer is a read */
        !            44: #define        DMAGO_NOINT     0x80    /* don't interrupt on completion */
        !            45:
        !            46: /* dma "controllers" (channels) */
        !            47: #define        DMA0            0x1
        !            48: #define        DMA1            0x2
        !            49:
        !            50: /*
        !            51:  * A DMA queue entry.  Initiator drivers each have one of these,
        !            52:  * used to queue access to the DMA controller.
        !            53:  */
        !            54: struct dmaqueue {
        !            55:        TAILQ_ENTRY(dmaqueue) dq_list;  /* entry on the queue */
        !            56:        int     dq_chan;                /* OR of channels initiator can use */
        !            57:        void    *dq_softc;              /* initiator's softc */
        !            58:
        !            59:        /*
        !            60:         * These functions are called to start the initiator when
        !            61:         * it has been given the DMA controller, and to stop the
        !            62:         * initiator when the DMA controller has stopped.
        !            63:         */
        !            64:        void    (*dq_start)(void *);
        !            65:        void    (*dq_done)(void *);
        !            66: };
        !            67:
        !            68: #ifdef _KERNEL
        !            69: void   dmainit(void);
        !            70: void   dmago(int, char *, u_int, int);
        !            71: void   dmastop(int);
        !            72: void   dmafree(struct dmaqueue *);
        !            73: int    dmareq(struct dmaqueue *);
        !            74: void   dmacomputeipl(void);
        !            75: #endif /* _KERNEL */