1 /* $NetBSD: neptune.c,v 1.23 2021/08/07 16:19:07 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The 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 * 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 /* 33 * Neptune-X -- X68k-ISA Bus Bridge 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: neptune.c,v 1.23 2021/08/07 16:19:07 thorpej Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/frame.h> 47 48 #include <arch/x68k/dev/intiovar.h> 49 #include <arch/x68k/dev/neptunevar.h> 50 51 /* bus_space stuff */ 52 static int neptune_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, 53 int, bus_space_handle_t *); 54 static void neptune_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, 55 bus_size_t); 56 static int neptune_bus_space_subregion(bus_space_tag_t, bus_space_handle_t, 57 bus_size_t, bus_size_t, bus_space_handle_t *); 58 59 static struct x68k_bus_space neptune_bus = { 60 #if 0 61 X68K_NEPUTUNE_BUS, 62 #endif 63 neptune_bus_space_map, neptune_bus_space_unmap, 64 neptune_bus_space_subregion, 65 x68k_bus_space_alloc, x68k_bus_space_free, 66 }; 67 68 69 static int neptune_match(device_t, cfdata_t, void *); 70 static void neptune_attach(device_t, device_t, void *); 71 static int neptune_search(device_t, cfdata_t, const int *, void *); 72 static int neptune_print(void *, const char *); 73 74 CFATTACH_DECL_NEW(neptune, sizeof(struct neptune_softc), 75 neptune_match, neptune_attach, NULL, NULL); 76 77 static int 78 neptune_match(device_t parent, cfdata_t cf, void *aux) 79 { 80 struct intio_attach_args *ia = aux; 81 82 if (strcmp(ia->ia_name, "neptune") != 0) 83 return 0; 84 85 ia->ia_size = 0x400; 86 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY)) 87 return 0; 88 89 /* Neptune is a virtual device. Always there. */ 90 91 return (1); 92 } 93 94 95 static void 96 neptune_attach(device_t parent, device_t self, void *aux) 97 { 98 struct neptune_softc *sc = device_private(self); 99 struct intio_attach_args *ia = aux; 100 struct neptune_attach_args na; 101 int r __diagused; 102 cfdata_t cf; 103 104 ia->ia_size = 0x400; 105 r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE); 106 #ifdef DIAGNOSTIC 107 if (r) 108 panic("IO map for Neptune corruption??"); 109 #endif 110 111 sc->sc_bst = malloc(sizeof(struct x68k_bus_space), M_DEVBUF, M_WAITOK); 112 *sc->sc_bst = neptune_bus; 113 sc->sc_bst->x68k_bus_device = self; 114 115 sc->sc_addr = (vaddr_t)IIOV(ia->ia_addr); 116 117 na.na_bst = sc->sc_bst; 118 na.na_intr = ia->ia_intr; 119 120 cf = config_search(self, &na, 121 CFARGS(.submatch = neptune_search)); 122 if (cf) { 123 aprint_normal(": Neptune-X ISA bridge\n"); 124 config_attach(self, cf, &na, neptune_print, CFARGS_NONE); 125 } else { 126 aprint_normal(": no device found.\n"); 127 intio_map_free_region(parent, ia); 128 } 129 } 130 131 static int 132 neptune_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 133 { 134 struct neptune_attach_args *na = aux; 135 136 na->na_addr = cf->neptune_cf_addr; 137 138 return config_match(parent, cf, na); 139 } 140 141 static int 142 neptune_print(void *aux, const char *name) 143 { 144 struct neptune_attach_args *na = aux; 145 146 /* if (na->na_addr > 0) */ 147 aprint_normal(" addr 0x%06x", na->na_addr); 148 149 return (QUIET); 150 } 151 152 153 /* 154 * neptune bus space stuff. 155 */ 156 static int 157 neptune_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, 158 int flags, bus_space_handle_t *bshp) 159 { 160 struct neptune_softc *sc = device_private(t->x68k_bus_device); 161 vaddr_t start = sc->sc_addr; 162 163 /* 164 * Neptune bus is mapped permanently. 165 */ 166 *bshp = (bus_space_handle_t) ((u_int)start + ((u_int)bpa - 0x200) * 2); 167 168 if (badaddr((void *)*bshp)) { 169 return 1; 170 } 171 172 *bshp |= 0x80000000; /* higher byte (= even address) only */ 173 174 return (0); 175 } 176 177 static void 178 neptune_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, 179 bus_size_t size) 180 { 181 return; 182 } 183 184 static int 185 neptune_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 186 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 187 { 188 189 *nbshp = bsh + offset*2; 190 return (0); 191 } 192
Indexes created Thu Oct 02 07:10:07 GMT 2025