1 /* $NetBSD: mainbus.c,v 1.20 2008/04/28 20:23:27 martin Exp $ */ 2 3 /* 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.20 2008/04/28 20:23:27 martin Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/device.h> 37 #include <sys/systm.h> 38 39 #define _M68K_BUS_DMA_PRIVATE 40 #include <machine/autoconf.h> 41 42 static int mainbus_match(struct device *, struct cfdata *, void *); 43 static void mainbus_attach(struct device *, struct device *, void *); 44 static int mainbus_search(struct device *, struct cfdata *, 45 const int *ldesc, void *); 46 47 CFATTACH_DECL(mainbus, sizeof(struct device), 48 mainbus_match, mainbus_attach, NULL, NULL); 49 50 struct m68k_bus_dma_tag mac68k_bus_dma_tag = { 51 NULL, /* _cookie */ 52 53 0, /* _boundary */ 54 55 _bus_dmamap_create, /* _dmamap_create */ 56 _bus_dmamap_destroy, /* _dmamap_destroy */ 57 _bus_dmamap_load_direct, /* _dmamap_load */ 58 _bus_dmamap_load_mbuf_direct, /* _dmamap_load_mbuf */ 59 _bus_dmamap_load_uio_direct, /* _dmamap_load_uio */ 60 _bus_dmamap_load_raw_direct, /* _dmamap_load_raw */ 61 _bus_dmamap_unload, /* _dmamap_unload */ 62 _bus_dmamap_sync, /* _dmamap_sync */ 63 64 _bus_dmamem_alloc, /* _dmamem_alloc */ 65 _bus_dmamem_free, /* _dmamem_free */ 66 _bus_dmamem_map, /* _dmamem_map */ 67 _bus_dmamem_unmap, /* _dmamem_unmap */ 68 _bus_dmamem_mmap /* _dmamem_mmap */ 69 }; 70 71 static int 72 mainbus_match(struct device *parent, struct cfdata *cf, void *aux) 73 { 74 static int mainbus_matched = 0; 75 76 /* Allow only one instance. */ 77 if (mainbus_matched) 78 return (0); 79 80 mainbus_matched = 1; 81 return 1; 82 } 83 84 static void 85 mainbus_attach(struct device *parent, struct device *self, void *aux) 86 { 87 struct mainbus_attach_args mba; 88 89 printf("\n"); 90 91 mba.mba_bst = MAC68K_BUS_SPACE_MEM; 92 mba.mba_dmat = &mac68k_bus_dma_tag; 93 94 /* Search for and attach children. */ 95 config_search_ia(mainbus_search, self, "mainbus", &mba); 96 } 97 98 static int 99 mainbus_search(struct device *parent, struct cfdata *cf, 100 const int *ldesc, void *aux) 101 { 102 if (config_match(parent, cf, aux) > 0) 103 config_attach(parent, cf, aux, NULL); 104 return 0; 105 } 106