obio.c revision 1.41
1 /* $NetBSD: obio.c,v 1.41 1998/03/23 17:21:52 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 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 #if defined(SUN4) 81 static int obioprint __P((void *, const char *)); 82 static int obiosearch __P((struct device *, struct cfdata *, void *)); 83 static int obio_bus_mmap __P((void *, bus_type_t, bus_addr_t, int)); 84 static int obio_find_rom_map __P((bus_addr_t, bus_type_t, int, 85 bus_space_handle_t *)); 86 #endif 87 88 struct cfattach obio_ca = { 89 sizeof(union obio_softc), obiomatch, obioattach 90 }; 91 92 #if defined(SUN4) 93 static struct sparc_bus_space_tag obio_space_tag = { 94 NULL, /* cookie */ 95 NULL, /* bus_space_map */ 96 NULL, /* bus_space_unmap */ 97 NULL, /* bus_space_subregion */ 98 NULL, /* bus_space_barrier */ 99 obio_bus_mmap, /* bus_space_mmap */ 100 NULL /* bus_intr_establish */ 101 }; 102 #endif 103 104 /* 105 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 106 * Apparently, the `interrupts' property on obio devices is just 107 * the processor IPL. 108 */ 109 static int intr_obio2ipl[] = { 110 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 111 }; 112 113 int 114 obiomatch(parent, cf, aux) 115 struct device *parent; 116 struct cfdata *cf; 117 void *aux; 118 { 119 struct mainbus_attach_args *ma = aux; 120 121 return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0); 122 } 123 124 #if defined(SUN4) 125 int 126 obioprint(args, busname) 127 void *args; 128 const char *busname; 129 { 130 union obio_attach_args *uoba = args; 131 struct obio4_attach_args *oba = &uoba->uoba_oba4; 132 133 printf(" addr %p", oba->oba_paddr); 134 if (oba->oba_pri != -1) 135 printf(" level %d", oba->oba_pri); 136 137 return (UNCONF); 138 } 139 #endif 140 141 void 142 obioattach(parent, self, aux) 143 struct device *parent, *self; 144 void *aux; 145 { 146 struct mainbus_attach_args *ma = aux; 147 148 /* 149 * There is only one obio bus 150 */ 151 if (self->dv_unit > 0) { 152 printf(" unsupported\n"); 153 return; 154 } 155 printf("\n"); 156 157 if (CPU_ISSUN4) { 158 #if defined(SUN4) 159 /* Propagate interrupt establish function */ 160 obio_space_tag.sparc_intr_establish = 161 ma->ma_bustag->sparc_intr_establish; 162 163 (void)config_search(obiosearch, self, aux); 164 #endif 165 return; 166 } else if (CPU_ISSUN4M) { 167 /* 168 * Attach the on-board I/O bus at on a sun4m. 169 * In this case we treat the obio bus as another sbus slot. 170 */ 171 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 172 173 static const char *const special4m[] = { 174 /* find these first */ 175 "eeprom", 176 "counter", 177 #if 0 /* Not all sun4m's have an `auxio' */ 178 "auxio", 179 #endif 180 "", 181 /* place device to ignore here */ 182 "interrupt", 183 NULL 184 }; 185 186 sc->sc_bustag = ma->ma_bustag; 187 sc->sc_dmatag = ma->ma_dmatag; 188 sc->sc_intr2ipl = intr_obio2ipl; 189 190 sbus_attach(sc, "obio", ma->ma_node, ma->ma_bp, special4m); 191 } else { 192 printf("obio on this machine?\n"); 193 } 194 } 195 196 197 int 198 obio_bus_probe(tag, addr, offset, size, callback, arg) 199 bus_space_tag_t tag; 200 void *addr; 201 int offset; 202 size_t size; 203 int (*callback) __P((void *, void *)); 204 void *arg; 205 { 206 #if defined(SUN4) 207 bus_addr_t paddr = (long)addr + offset; 208 bus_space_handle_t bh; 209 caddr_t tmp; 210 int result; 211 212 if (sparc_bus_map(0, PMAP_OBIO, paddr, size, 0, TMPMAP_VA, &bh) != 0) 213 return (0); 214 215 tmp = (caddr_t)bh; 216 result = probeget(tmp + offset, size) != -1; 217 if (result && callback != NULL) 218 result = (*callback)(tmp, arg); 219 pmap_remove(pmap_kernel(), TMPMAP_VA, TMPMAP_VA+NBPG); 220 return (result); 221 #else 222 return (ENXIO); 223 #endif /*SUN4*/ 224 } 225 226 int 227 obio_bus_map(tag, addr, offset, size, flags, vaddr, hp) 228 bus_space_tag_t tag; 229 void *addr; 230 int offset; 231 size_t size; 232 int flags; 233 void *vaddr; 234 bus_space_handle_t *hp; 235 { 236 #if defined(SUN4) 237 bus_addr_t paddr = (long)addr + offset; 238 239 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 240 obio_find_rom_map(paddr, PMAP_OBIO, size, hp) == 0) 241 return (0); 242 243 return (sparc_bus_map(0, PMAP_OBIO, paddr, size, flags, 244 (vm_offset_t)vaddr, hp)); 245 #else 246 return (ENXIO); 247 #endif /*SUN4*/ 248 } 249 250 #if defined(SUN4) 251 int 252 obio_bus_mmap(cookie, btype, paddr, flags) 253 void *cookie; 254 bus_type_t btype; 255 bus_addr_t paddr; 256 int flags; 257 { 258 259 return (sparc_bus_mmap(0, PMAP_OBIO, paddr, flags)); 260 } 261 262 int 263 obiosearch(parent, cf, aux) 264 struct device *parent; 265 struct cfdata *cf; 266 void *aux; 267 { 268 struct mainbus_attach_args *ma = aux; 269 union obio_attach_args uoba; 270 struct obio4_attach_args *oba = &uoba.uoba_oba4; 271 struct bootpath *bp; 272 273 274 /* 275 * Avoid sun4m entries which don't have valid PAs. 276 * no point in even probing them. 277 */ 278 if (cf->cf_loc[0] == -1) 279 return (0); 280 281 /* 282 * On the 4/100 obio addresses must be mapped at 283 * 0x0YYYYYYY, but alias higher up (we avoid the 284 * alias condition because it causes pmap difficulties) 285 * XXX: We also assume that 4/[23]00 obio addresses 286 * must be 0xZYYYYYYY, where (Z != 0) 287 */ 288 if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000)) 289 return (0); 290 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000)) 291 return (0); 292 293 uoba.uoba_isobio4 = 1; 294 oba->oba_bustag = &obio_space_tag; 295 oba->oba_dmatag = ma->ma_dmatag; 296 oba->oba_paddr = (void *)cf->cf_loc[0]; 297 oba->oba_pri = cf->cf_loc[1]; 298 299 bp = ma->ma_bp; 300 if (bp != NULL && strcmp(bp->name, "obio") == 0) 301 oba->oba_bp = bp + 1; 302 else 303 oba->oba_bp = NULL; 304 305 if ((*cf->cf_attach->ca_match)(parent, cf, &uoba) == 0) 306 return (0); 307 308 config_attach(parent, cf, &uoba, obioprint); 309 return (1); 310 } 311 312 313 /* 314 * If we can find a mapping that was established by the rom, use it. 315 * Else, create a new mapping. 316 */ 317 int 318 obio_find_rom_map(pa, iospace, len, hp) 319 bus_addr_t pa; 320 bus_type_t iospace; 321 int len; 322 bus_space_handle_t *hp; 323 { 324 #define getpte(va) lda(va, ASI_PTE) 325 326 u_long pf; 327 int pgtype; 328 u_long va, pte; 329 330 if (len <= NBPG) 331 return (EINVAL); 332 333 pf = pa >> PGSHIFT; 334 pgtype = PMAP_T2PTE_4(iospace); 335 336 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) { 337 pte = getpte(va); 338 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 339 (pte & PG_PFNUM) != pf) 340 continue; 341 342 /* 343 * Found entry in PROM's pagetable 344 * note: preserve page offset 345 */ 346 *hp = (bus_space_handle_t)(va | ((u_long)pa & PGOFSET)); 347 return (0); 348 } 349 350 return (ENOENT); 351 } 352 #endif /* SUN4 */ 353
Indexes created Fri Oct 03 02:09:57 GMT 2025