1 /* $NetBSD: mbio.c,v 1.21 2021/08/07 16:19:06 thorpej 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 Adam Glass, Gordon W. Ross, and Matthew Fredette. 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: mbio.c,v 1.21 2021/08/07 16:19:06 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <machine/autoconf.h> 42 #include <machine/pmap.h> 43 44 #include <sun2/sun2/control.h> 45 #include <sun2/sun2/machdep.h> 46 #include <sun2/sun2/mbio.h> 47 48 /* Does this machine have a Multibus? */ 49 extern int cpu_has_multibus; 50 51 static int mbio_match(device_t, cfdata_t, void *); 52 static void mbio_attach(device_t, device_t, void *); 53 54 struct mbio_softc { 55 device_t sc_dev; /* base device */ 56 bus_space_tag_t sc_bustag; /* parent bus tag */ 57 bus_dma_tag_t sc_dmatag; /* parent bus dma tag */ 58 }; 59 60 CFATTACH_DECL_NEW(mbio, sizeof(struct mbio_softc), 61 mbio_match, mbio_attach, NULL, NULL); 62 63 static int mbio_attached; 64 65 static paddr_t mbio_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t, 66 int, int); 67 static int _mbio_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t, 68 int, vaddr_t, bus_space_handle_t *); 69 70 static struct sun68k_bus_space_tag mbio_space_tag = { 71 NULL, /* cookie */ 72 NULL, /* parent bus tag */ 73 _mbio_bus_map, /* bus_space_map */ 74 NULL, /* bus_space_unmap */ 75 NULL, /* bus_space_subregion */ 76 NULL, /* bus_space_barrier */ 77 mbio_bus_mmap, /* bus_space_mmap */ 78 NULL, /* bus_intr_establish */ 79 NULL, /* bus_space_peek_N */ 80 NULL /* bus_space_poke_N */ 81 }; 82 83 static int 84 mbio_match(device_t parent, cfdata_t cf, void *aux) 85 { 86 struct mainbus_attach_args *ma = aux; 87 88 if (mbio_attached) 89 return 0; 90 91 return (cpu_has_multibus && 92 (ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0)); 93 } 94 95 static void 96 mbio_attach(device_t parent, device_t self, void *aux) 97 { 98 struct mainbus_attach_args *ma = aux; 99 struct mbio_softc *sc = device_private(self); 100 struct mbio_attach_args mba; 101 const char *const *cpp; 102 static const char *const special[] = { 103 /* find these first */ 104 NULL 105 }; 106 107 mbio_attached = 1; 108 109 sc->sc_dev = self; 110 aprint_normal("\n"); 111 112 sc->sc_bustag = ma->ma_bustag; 113 sc->sc_dmatag = ma->ma_dmatag; 114 115 mbio_space_tag.cookie = sc; 116 mbio_space_tag.parent = sc->sc_bustag; 117 118 /* 119 * Prepare the skeleton attach arguments for our devices. 120 * The values we give in the locators are indications to 121 * sun68k_bus_search about which locators must and must not 122 * be defined. 123 */ 124 mba = *ma; 125 mba.mba_bustag = &mbio_space_tag; 126 mba.mba_paddr = LOCATOR_REQUIRED; 127 mba.mba_pri = LOCATOR_OPTIONAL; 128 129 /* Find all `early' mbio devices */ 130 for (cpp = special; *cpp != NULL; cpp++) { 131 mba.mba_name = *cpp; 132 config_search(self, &mba, 133 CFARGS(.search = sun68k_bus_search)); 134 } 135 136 /* Find all other mbio devices */ 137 mba.mba_name = NULL; 138 config_search(self, &mba, 139 CFARGS(.search = sun68k_bus_search)); 140 } 141 142 int 143 _mbio_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, 144 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp) 145 { 146 struct mbio_softc *sc = t->cookie; 147 148 if ((paddr + size) > MBIO_SIZE) 149 panic("%s: out of range", __func__); 150 151 return bus_space_map2(sc->sc_bustag, PMAP_MBIO, paddr, 152 size, flags | _SUN68K_BUS_MAP_USE_PROM, vaddr, hp); 153 } 154 155 paddr_t 156 mbio_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off, 157 int prot, int flags) 158 { 159 struct mbio_softc *sc = t->cookie; 160 161 return bus_space_mmap2(sc->sc_bustag, PMAP_MBIO, paddr, off, 162 prot, flags); 163 } 164
Indexes created Sun Oct 25 00:26:45 UTC 2026