obio.c revision 1.43
1 /* $NetBSD: obio.c,v 1.43 1998/04/07 20:20:03 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1997,1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 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. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 45 #ifdef DEBUG 46 #include <sys/proc.h> 47 #include <sys/syslog.h> 48 #endif 49 50 #include <vm/vm.h> 51 52 #include <machine/bus.h> 53 #include <sparc/dev/sbusvar.h> 54 #include <machine/autoconf.h> 55 #include <machine/pmap.h> 56 #include <machine/oldmon.h> 57 #include <machine/cpu.h> 58 #include <machine/ctlreg.h> 59 #include <sparc/sparc/asm.h> 60 #include <sparc/sparc/vaddrs.h> 61 #include <sparc/sparc/cpuvar.h> 62 63 struct obio4_softc { 64 struct device sc_dev; /* base device */ 65 bus_space_tag_t sc_bustag; /* parent bus tag */ 66 bus_dma_tag_t sc_dmatag; /* parent bus dma tag */ 67 }; 68 69 union obio_softc { 70 struct device sc_dev; /* base device */ 71 struct obio4_softc sc_obio; /* sun4 obio */ 72 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ 73 }; 74 75 76 /* autoconfiguration driver */ 77 static int obiomatch __P((struct device *, struct cfdata *, void *)); 78 static void obioattach __P((struct device *, struct device *, void *)); 79 80 struct cfattach obio_ca = { 81 sizeof(union obio_softc), obiomatch, obioattach 82 }; 83 84 #if defined(SUN4) 85 static int obioprint __P((void *, const char *)); 86 static int obiosearch __P((struct device *, struct cfdata *, void *)); 87 static int obio_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t, 88 int, bus_space_handle_t *)); 89 static int _obio_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t, 90 bus_size_t, int, 91 vm_offset_t, bus_space_handle_t *)); 92 93 static struct sparc_bus_space_tag obio_space_tag = { 94 NULL, /* cookie */ 95 NULL, /* parent bus tag */ 96 _obio_bus_map, /* bus_space_map */ 97 NULL, /* bus_space_unmap */ 98 NULL, /* bus_space_subregion */ 99 NULL, /* bus_space_barrier */ 100 obio_bus_mmap, /* bus_space_mmap */ 101 NULL /* bus_intr_establish */ 102 }; 103 #endif 104 105 /* 106 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 107 * Apparently, the `interrupts' property on obio devices is just 108 * the processor IPL. 109 */ 110 static int intr_obio2ipl[] = { 111 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 112 }; 113 114 int 115 obiomatch(parent, cf, aux) 116 struct device *parent; 117 struct cfdata *cf; 118 void *aux; 119 { 120 struct mainbus_attach_args *ma = aux; 121 122 return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0); 123 } 124 125 void 126 obioattach(parent, self, aux) 127 struct device *parent, *self; 128 void *aux; 129 { 130 struct mainbus_attach_args *ma = aux; 131 132 /* 133 * There is only one obio bus 134 */ 135 if (self->dv_unit > 0) { 136 printf(" unsupported\n"); 137 return; 138 } 139 printf("\n"); 140 141 if (CPU_ISSUN4) { 142 #if defined(SUN4) 143 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 144 145 sc->sc_bustag = ma->ma_bustag; 146 sc->sc_dmatag = ma->ma_dmatag; 147 148 obio_space_tag.cookie = sc; 149 obio_space_tag.parent = sc->sc_bustag; 150 151 (void)config_search(obiosearch, self, aux); 152 #endif 153 return; 154 } else if (CPU_ISSUN4M) { 155 /* 156 * Attach the on-board I/O bus at on a sun4m. 157 * In this case we treat the obio bus as another sbus slot. 158 */ 159 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 160 161 static const char *const special4m[] = { 162 /* find these first */ 163 "eeprom", 164 "counter", 165 #if 0 /* Not all sun4m's have an `auxio' */ 166 "auxio", 167 #endif 168 "", 169 /* place device to ignore here */ 170 "interrupt", 171 NULL 172 }; 173 174 sc->sc_bustag = ma->ma_bustag; 175 sc->sc_dmatag = ma->ma_dmatag; 176 sc->sc_intr2ipl = intr_obio2ipl; 177 178 sbus_attach(sc, "obio", ma->ma_node, ma->ma_bp, special4m); 179 } else { 180 printf("obio on this machine?\n"); 181 } 182 } 183 184 #if defined(SUN4) 185 int 186 obioprint(args, busname) 187 void *args; 188 const char *busname; 189 { 190 union obio_attach_args *uoba = args; 191 struct obio4_attach_args *oba = &uoba->uoba_oba4; 192 193 printf(" addr 0x%lx", (long)oba->oba_paddr); 194 if (oba->oba_pri != -1) 195 printf(" level %d", oba->oba_pri); 196 197 return (UNCONF); 198 } 199 200 int 201 _obio_bus_map(t, btype, paddr, size, flags, vaddr, hp) 202 bus_space_tag_t t; 203 bus_type_t btype; 204 bus_addr_t paddr; 205 bus_size_t size; 206 int flags; 207 vm_offset_t vaddr; 208 bus_space_handle_t *hp; 209 { 210 struct obio4_softc *sc = t->cookie; 211 212 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 213 obio_find_rom_map(paddr, PMAP_OBIO, size, hp) == 0) 214 return (0); 215 216 return (bus_space_map2(sc->sc_bustag, PMAP_OBIO, paddr, 217 size, flags, vaddr, hp)); 218 } 219 220 int 221 obio_bus_mmap(t, btype, paddr, flags, hp) 222 bus_space_tag_t t; 223 bus_type_t btype; 224 bus_addr_t paddr; 225 int flags; 226 bus_space_handle_t *hp; 227 { 228 struct obio4_softc *sc = t->cookie; 229 230 return (bus_space_mmap(sc->sc_bustag, PMAP_OBIO, paddr, flags, hp)); 231 } 232 233 int 234 obiosearch(parent, cf, aux) 235 struct device *parent; 236 struct cfdata *cf; 237 void *aux; 238 { 239 struct mainbus_attach_args *ma = aux; 240 union obio_attach_args uoba; 241 struct obio4_attach_args *oba = &uoba.uoba_oba4; 242 struct bootpath *bp; 243 244 245 /* 246 * Avoid sun4m entries which don't have valid PAs. 247 * no point in even probing them. 248 */ 249 if (cf->cf_loc[0] == -1) 250 return (0); 251 252 /* 253 * On the 4/100 obio addresses must be mapped at 254 * 0x0YYYYYYY, but alias higher up (we avoid the 255 * alias condition because it causes pmap difficulties) 256 * XXX: We also assume that 4/[23]00 obio addresses 257 * must be 0xZYYYYYYY, where (Z != 0) 258 */ 259 if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000)) 260 return (0); 261 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000)) 262 return (0); 263 264 uoba.uoba_isobio4 = 1; 265 oba->oba_bustag = &obio_space_tag; 266 oba->oba_dmatag = ma->ma_dmatag; 267 oba->oba_paddr = cf->cf_loc[0]; 268 oba->oba_pri = cf->cf_loc[1]; 269 270 bp = ma->ma_bp; 271 if (bp != NULL && strcmp(bp->name, "obio") == 0) 272 oba->oba_bp = bp + 1; 273 else 274 oba->oba_bp = NULL; 275 276 if ((*cf->cf_attach->ca_match)(parent, cf, &uoba) == 0) 277 return (0); 278 279 config_attach(parent, cf, &uoba, obioprint); 280 return (1); 281 } 282 283 284 /* 285 * If we can find a mapping that was established by the rom, use it. 286 * Else, create a new mapping. 287 */ 288 int 289 obio_find_rom_map(pa, iospace, len, hp) 290 bus_addr_t pa; 291 bus_type_t iospace; 292 int len; 293 bus_space_handle_t *hp; 294 { 295 #define getpte(va) lda(va, ASI_PTE) 296 297 u_long pf; 298 int pgtype; 299 u_long va, pte; 300 301 if (len > NBPG) 302 return (EINVAL); 303 304 pf = pa >> PGSHIFT; 305 pgtype = PMAP_T2PTE_4(iospace); 306 307 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) { 308 pte = getpte(va); 309 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 310 (pte & PG_PFNUM) != pf) 311 continue; 312 313 /* 314 * Found entry in PROM's pagetable 315 * note: preserve page offset 316 */ 317 *hp = (bus_space_handle_t)(va | ((u_long)pa & PGOFSET)); 318 return (0); 319 } 320 321 return (ENOENT); 322 } 323 #endif /* SUN4 */ 324
Indexes created Tue Sep 23 02:09:52 GMT 2025