1 /* $NetBSD: neptune.c,v 1.11 2005/01/18 07:12:15 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Minoura Makoto. 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 by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Neptune-X -- X68k-ISA Bus Bridge 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: neptune.c,v 1.11 2005/01/18 07:12:15 chs Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/malloc.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/frame.h> 53 54 #include <arch/x68k/dev/intiovar.h> 55 #include <arch/x68k/dev/neptunevar.h> 56 57 /* bus_space stuff */ 58 static int neptune_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, 59 int, bus_space_handle_t *); 60 static void neptune_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, 61 bus_size_t); 62 static int neptune_bus_space_subregion(bus_space_tag_t, bus_space_handle_t, 63 bus_size_t, bus_size_t, bus_space_handle_t *); 64 65 static struct x68k_bus_space neptune_bus = { 66 #if 0 67 X68K_NEPUTUNE_BUS, 68 #endif 69 neptune_bus_space_map, neptune_bus_space_unmap, 70 neptune_bus_space_subregion, 71 x68k_bus_space_alloc, x68k_bus_space_free, 72 }; 73 74 75 static int neptune_match(struct device *, struct cfdata *, void *); 76 static void neptune_attach(struct device *, struct device *, void *); 77 static int neptune_search(struct device *, struct cfdata *cf, void *); 78 static int neptune_print(void *, const char *); 79 80 CFATTACH_DECL(neptune, sizeof(struct neptune_softc), 81 neptune_match, neptune_attach, NULL, NULL); 82 83 static int 84 neptune_match(struct device *parent, struct cfdata *cf, void *aux) 85 { 86 struct intio_attach_args *ia = aux; 87 88 if (strcmp(ia->ia_name, "neptune") != 0) 89 return 0; 90 91 ia->ia_size = 0x400; 92 if (intio_map_allocate_region (parent, ia, INTIO_MAP_TESTONLY)) 93 return 0; 94 95 /* Neptune is a virtual device. Always there. */ 96 97 return (1); 98 } 99 100 101 static void 102 neptune_attach(struct device *parent, struct device *self, void *aux) 103 { 104 struct neptune_softc *sc = (struct neptune_softc *)self; 105 struct intio_attach_args *ia = aux; 106 struct neptune_attach_args na; 107 int r; 108 struct cfdata *cf; 109 110 ia->ia_size = 0x400; 111 r = intio_map_allocate_region (parent, ia, INTIO_MAP_ALLOCATE); 112 #ifdef DIAGNOSTIC 113 if (r) 114 panic ("IO map for Neptune corruption??"); 115 #endif 116 117 sc->sc_bst = malloc(sizeof(struct x68k_bus_space), M_DEVBUF, M_NOWAIT); 118 if (sc->sc_bst == NULL) 119 panic("neptune_attach: can't allocate bus_space structure"); 120 *sc->sc_bst = neptune_bus; 121 sc->sc_bst->x68k_bus_device = self; 122 123 sc->sc_addr = (vaddr_t) (ia->ia_addr - PHYS_INTIODEV + intiobase); 124 125 na.na_bst = sc->sc_bst; 126 na.na_intr = ia->ia_intr; 127 128 cf = config_search (neptune_search, self, &na); 129 if (cf) { 130 printf (": Neptune-X ISA bridge\n"); 131 config_attach(self, cf, &na, neptune_print); 132 } else { 133 printf (": no device found.\n"); 134 intio_map_free_region(parent, ia); 135 } 136 } 137 138 static int 139 neptune_search(struct device *parent, struct cfdata *cf, void *aux) 140 { 141 struct neptune_attach_args *na = aux; 142 143 na->na_addr = cf->neptune_cf_addr; 144 145 return config_match(parent, cf, na); 146 } 147 148 static int 149 neptune_print(void *aux, const char *name) 150 { 151 struct neptune_attach_args *na = aux; 152 153 /* if (na->na_addr > 0) */ 154 aprint_normal (" addr 0x%06x", na->na_addr); 155 156 return (QUIET); 157 } 158 159 160 /* 161 * neptune bus space stuff. 162 */ 163 static int 164 neptune_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, 165 int flags, bus_space_handle_t *bshp) 166 { 167 vaddr_t start = ((struct neptune_softc*) ((struct x68k_bus_space*) t) 168 ->x68k_bus_device)->sc_addr; 169 170 /* 171 * Neptune bus is mapped permanently. 172 */ 173 *bshp = (bus_space_handle_t) ((u_int)start + ((u_int)bpa - 0x200) * 2); 174 175 if (badaddr((caddr_t)*bshp)) { 176 return 1; 177 } 178 179 *bshp |= 0x80000000; /* higher byte (= even address) only */ 180 181 return (0); 182 } 183 184 static void 185 neptune_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, 186 bus_size_t size) 187 { 188 return; 189 } 190 191 static int 192 neptune_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 193 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 194 { 195 196 *nbshp = bsh + offset*2; 197 return (0); 198 } 199