1 1.15 thorpej /* $NetBSD: dmavar.h,v 1.15 2024/01/16 07:06:59 thorpej Exp $ */ 2 1.10 thorpej 3 1.10 thorpej /*- 4 1.10 thorpej * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 1.10 thorpej * All rights reserved. 6 1.10 thorpej * 7 1.10 thorpej * This code is derived from software contributed to The NetBSD Foundation 8 1.10 thorpej * by Jason R. Thorpe. 9 1.10 thorpej * 10 1.10 thorpej * Redistribution and use in source and binary forms, with or without 11 1.10 thorpej * modification, are permitted provided that the following conditions 12 1.10 thorpej * are met: 13 1.10 thorpej * 1. Redistributions of source code must retain the above copyright 14 1.10 thorpej * notice, this list of conditions and the following disclaimer. 15 1.10 thorpej * 2. Redistributions in binary form must reproduce the above copyright 16 1.10 thorpej * notice, this list of conditions and the following disclaimer in the 17 1.10 thorpej * documentation and/or other materials provided with the distribution. 18 1.10 thorpej * 19 1.10 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.10 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.10 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.10 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.10 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.10 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.10 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.10 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.10 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.10 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.10 thorpej * POSSIBILITY OF SUCH DAMAGE. 30 1.10 thorpej */ 31 1.4 cgd 32 1.1 cgd /* 33 1.3 mycroft * Copyright (c) 1982, 1990, 1993 34 1.3 mycroft * The Regents of the University of California. All rights reserved. 35 1.1 cgd * 36 1.1 cgd * Redistribution and use in source and binary forms, with or without 37 1.1 cgd * modification, are permitted provided that the following conditions 38 1.1 cgd * are met: 39 1.1 cgd * 1. Redistributions of source code must retain the above copyright 40 1.1 cgd * notice, this list of conditions and the following disclaimer. 41 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 42 1.1 cgd * notice, this list of conditions and the following disclaimer in the 43 1.1 cgd * documentation and/or other materials provided with the distribution. 44 1.11 agc * 3. Neither the name of the University nor the names of its contributors 45 1.1 cgd * may be used to endorse or promote products derived from this software 46 1.1 cgd * without specific prior written permission. 47 1.1 cgd * 48 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 1.1 cgd * SUCH DAMAGE. 59 1.1 cgd * 60 1.4 cgd * @(#)dmavar.h 8.1 (Berkeley) 6/10/93 61 1.1 cgd */ 62 1.1 cgd 63 1.7 thorpej #include <sys/queue.h> 64 1.7 thorpej 65 1.1 cgd /* dmago flags */ 66 1.1 cgd #define DMAGO_BYTE 0x00 /* do byte (8 bit) transfers */ 67 1.1 cgd #define DMAGO_WORD 0x01 /* do word (16 bit) transfers */ 68 1.1 cgd #define DMAGO_LWORD 0x02 /* do longword (32 bit) transfers */ 69 1.1 cgd #define DMAGO_PRI 0x04 /* do "priority" DMA */ 70 1.1 cgd #define DMAGO_READ 0x08 /* transfer is a read */ 71 1.1 cgd #define DMAGO_NOINT 0x80 /* don't interrupt on completion */ 72 1.1 cgd 73 1.1 cgd /* dma "controllers" (channels) */ 74 1.1 cgd #define DMA0 0x1 75 1.1 cgd #define DMA1 0x2 76 1.7 thorpej 77 1.7 thorpej /* 78 1.7 thorpej * A DMA queue entry. Initiator drivers each have one of these, 79 1.7 thorpej * used to queue access to the DMA controller. 80 1.7 thorpej */ 81 1.7 thorpej struct dmaqueue { 82 1.7 thorpej TAILQ_ENTRY(dmaqueue) dq_list; /* entry on the queue */ 83 1.7 thorpej int dq_chan; /* OR of channels initiator can use */ 84 1.7 thorpej void *dq_softc; /* initiator's softc */ 85 1.7 thorpej 86 1.7 thorpej /* 87 1.7 thorpej * These functions are called to start the initiator when 88 1.7 thorpej * it has been given the DMA controller, and to stop the 89 1.7 thorpej * initiator when the DMA controller has stopped. 90 1.7 thorpej */ 91 1.12 thorpej void (*dq_start)(void *); 92 1.12 thorpej void (*dq_done)(void *); 93 1.7 thorpej }; 94 1.1 cgd 95 1.5 jtc #ifdef _KERNEL 96 1.12 thorpej void dmainit(void); 97 1.12 thorpej void dmago(int, char *, int, int); 98 1.12 thorpej void dmastop(int); 99 1.12 thorpej void dmafree(struct dmaqueue *); 100 1.12 thorpej int dmareq(struct dmaqueue *); 101 1.15 thorpej void dmaupdateipl(int); 102 1.8 scottr #endif /* _KERNEL */ 103
Indexes created Mon Sep 22 05:09:51 GMT 2025