obio.c revision 1.64
1 /* $NetBSD: obio.c,v 1.64 2003/07/15 00:04:55 lukem 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 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.64 2003/07/15 00:04:55 lukem Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 47 #ifdef DEBUG 48 #include <sys/proc.h> 49 #include <sys/syslog.h> 50 #endif 51 52 #include <uvm/uvm_extern.h> 53 54 #include <machine/bus.h> 55 #include <sparc/dev/sbusvar.h> 56 #include <machine/autoconf.h> 57 #include <machine/oldmon.h> 58 #include <machine/cpu.h> 59 #include <machine/ctlreg.h> 60 #include <sparc/sparc/asm.h> 61 #include <sparc/sparc/vaddrs.h> 62 #include <sparc/sparc/cpuvar.h> 63 64 struct obio4_softc { 65 struct device sc_dev; /* base device */ 66 bus_space_tag_t sc_bustag; /* parent bus tag */ 67 bus_dma_tag_t sc_dmatag; /* parent bus DMA tag */ 68 }; 69 70 union obio_softc { 71 struct device sc_dev; /* base device */ 72 struct obio4_softc sc_obio; /* sun4 obio */ 73 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ 74 }; 75 76 77 /* autoconfiguration driver */ 78 static int obiomatch __P((struct device *, struct cfdata *, void *)); 79 static void obioattach __P((struct device *, struct device *, void *)); 80 81 CFATTACH_DECL(obio, sizeof(union obio_softc), 82 obiomatch, obioattach, NULL, NULL); 83 84 /* 85 * This `obio4_busattachargs' data structure only exists to pass down 86 * to obiosearch() the name of a device that must be configured early. 87 */ 88 struct obio4_busattachargs { 89 struct mainbus_attach_args *ma; 90 const char *name; 91 }; 92 93 #if defined(SUN4) 94 static int obioprint __P((void *, const char *)); 95 static int obiosearch __P((struct device *, struct cfdata *, void *)); 96 static paddr_t obio_bus_mmap __P((bus_space_tag_t, bus_addr_t, off_t, 97 int, int)); 98 static int _obio_bus_map __P((bus_space_tag_t, bus_addr_t, 99 bus_size_t, int, 100 vaddr_t, bus_space_handle_t *)); 101 102 static struct sparc_bus_space_tag obio_space_tag = { 103 NULL, /* cookie */ 104 NULL, /* parent bus tag */ 105 NULL, /* ranges */ 106 0, /* nranges */ 107 _obio_bus_map, /* bus_space_map */ 108 NULL, /* bus_space_unmap */ 109 NULL, /* bus_space_subregion */ 110 NULL, /* bus_space_barrier */ 111 obio_bus_mmap, /* bus_space_mmap */ 112 NULL, /* bus_intr_establish */ 113 #if __FULL_SPARC_BUS_SPACE 114 NULL, /* read_1 */ 115 NULL, /* read_2 */ 116 NULL, /* read_4 */ 117 NULL, /* read_8 */ 118 NULL, /* write_1 */ 119 NULL, /* write_2 */ 120 NULL, /* write_4 */ 121 NULL, /* write_8 */ 122 #endif 123 }; 124 #endif 125 126 /* 127 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 128 * Apparently, the `interrupts' property on obio devices is just 129 * the processor IPL. 130 */ 131 static int intr_obio2ipl[] = { 132 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 133 }; 134 135 int 136 obiomatch(parent, cf, aux) 137 struct device *parent; 138 struct cfdata *cf; 139 void *aux; 140 { 141 struct mainbus_attach_args *ma = aux; 142 143 return (strcmp(cf->cf_name, ma->ma_name) == 0); 144 } 145 146 void 147 obioattach(parent, self, aux) 148 struct device *parent, *self; 149 void *aux; 150 { 151 struct mainbus_attach_args *ma = aux; 152 153 /* 154 * There is only one obio bus 155 */ 156 if (self->dv_unit > 0) { 157 printf(" unsupported\n"); 158 return; 159 } 160 printf("\n"); 161 162 if (CPU_ISSUN4) { 163 #if defined(SUN4) 164 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 165 struct obio4_busattachargs oa; 166 const char *const *cpp; 167 static const char *const special4[] = { 168 /* find these first */ 169 "timer", 170 "dma", /* need this before `esp', if any */ 171 NULL 172 }; 173 174 sc->sc_bustag = ma->ma_bustag; 175 sc->sc_dmatag = ma->ma_dmatag; 176 177 obio_space_tag.cookie = sc; 178 obio_space_tag.parent = sc->sc_bustag; 179 180 oa.ma = ma; 181 182 /* Find all `early' obio devices */ 183 for (cpp = special4; *cpp != NULL; cpp++) { 184 oa.name = *cpp; 185 (void)config_search(obiosearch, self, &oa); 186 } 187 188 /* Find all other obio devices */ 189 oa.name = NULL; 190 (void)config_search(obiosearch, self, &oa); 191 #endif 192 return; 193 } else if (CPU_ISSUN4M) { 194 /* 195 * Attach the on-board I/O bus at on a sun4m. 196 * In this case we treat the obio bus as another sbus slot. 197 */ 198 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 199 200 static const char *const special4m[] = { 201 /* find these first */ 202 "eeprom", 203 "counter", 204 #if 0 /* Not all sun4m's have an `auxio' */ 205 "auxio", 206 #endif 207 "", 208 /* place device to ignore here */ 209 "interrupt", 210 NULL 211 }; 212 213 sc->sc_bustag = ma->ma_bustag; 214 sc->sc_dmatag = ma->ma_dmatag; 215 sc->sc_intr2ipl = intr_obio2ipl; 216 217 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 218 } else { 219 printf("obio on this machine?\n"); 220 } 221 } 222 223 #if defined(SUN4) 224 int 225 obioprint(args, busname) 226 void *args; 227 const char *busname; 228 { 229 union obio_attach_args *uoba = args; 230 struct obio4_attach_args *oba = &uoba->uoba_oba4; 231 232 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 233 if (oba->oba_pri != -1) 234 aprint_normal(" level %d", oba->oba_pri); 235 236 return (UNCONF); 237 } 238 239 int 240 _obio_bus_map(t, ba, size, flags, va, hp) 241 bus_space_tag_t t; 242 bus_addr_t ba; 243 bus_size_t size; 244 int flags; 245 vaddr_t va; 246 bus_space_handle_t *hp; 247 { 248 struct obio4_softc *sc = t->cookie; 249 250 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 251 obio_find_rom_map(ba, size, hp) == 0) 252 return (0); 253 254 return (bus_space_map2(sc->sc_bustag, ba, size, flags, va, hp)); 255 } 256 257 paddr_t 258 obio_bus_mmap(t, ba, off, prot, flags) 259 bus_space_tag_t t; 260 bus_addr_t ba; 261 off_t off; 262 int prot; 263 int flags; 264 { 265 struct obio4_softc *sc = t->cookie; 266 267 return (bus_space_mmap(sc->sc_bustag, ba, off, prot, flags)); 268 } 269 270 int 271 obiosearch(parent, cf, aux) 272 struct device *parent; 273 struct cfdata *cf; 274 void *aux; 275 { 276 struct obio4_busattachargs *oap = aux; 277 union obio_attach_args uoba; 278 struct obio4_attach_args *oba = &uoba.uoba_oba4; 279 280 /* Check whether we're looking for a specifically named device */ 281 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 282 return (0); 283 284 /* 285 * Avoid sun4m entries which don't have valid PAs. 286 * no point in even probing them. 287 */ 288 if (cf->cf_loc[0] == -1) 289 return (0); 290 291 /* 292 * On the 4/100 obio addresses must be mapped at 293 * 0x0YYYYYYY, but alias higher up (we avoid the 294 * alias condition because it causes pmap difficulties) 295 * XXX: We also assume that 4/[23]00 obio addresses 296 * must be 0xZYYYYYYY, where (Z != 0) 297 */ 298 if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000)) 299 return (0); 300 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000)) 301 return (0); 302 303 uoba.uoba_isobio4 = 1; 304 oba->oba_bustag = &obio_space_tag; 305 oba->oba_dmatag = oap->ma->ma_dmatag; 306 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, cf->cf_loc[0]); 307 oba->oba_pri = cf->cf_loc[1]; 308 309 if (config_match(parent, cf, &uoba) == 0) 310 return (0); 311 312 config_attach(parent, cf, &uoba, obioprint); 313 return (1); 314 } 315 316 317 /* 318 * If we can find a mapping that was established by the rom, use it. 319 * Else, create a new mapping. 320 */ 321 int 322 obio_find_rom_map(ba, len, hp) 323 bus_addr_t ba; 324 int len; 325 bus_space_handle_t *hp; 326 { 327 #define getpte(va) lda(va, ASI_PTE) 328 329 u_long pa, pf; 330 int pgtype; 331 u_long va, pte; 332 333 if (len > PAGE_SIZE) 334 return (EINVAL); 335 336 pa = BUS_ADDR_PADDR(ba); 337 pf = pa >> PGSHIFT; 338 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 339 340 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 341 pte = getpte(va); 342 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 343 (pte & PG_PFNUM) != pf) 344 continue; 345 346 /* 347 * Found entry in PROM's pagetable 348 * note: preserve page offset 349 */ 350 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 351 return (0); 352 } 353 354 return (ENOENT); 355 } 356 #endif /* SUN4 */ 357
Indexes created Mon Sep 22 21:09:42 GMT 2025