obio.c revision 1.67
1 /* $NetBSD: obio.c,v 1.67 2005/06/30 17:03:54 drochner 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 1.67 2005/06/30 17:03:54 drochner Exp $"); 41 42 #include "locators.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/malloc.h> 48 49 #ifdef DEBUG 50 #include <sys/proc.h> 51 #include <sys/syslog.h> 52 #endif 53 54 #include <uvm/uvm_extern.h> 55 56 #include <machine/bus.h> 57 #include <sparc/dev/sbusvar.h> 58 #include <machine/autoconf.h> 59 #include <machine/oldmon.h> 60 #include <machine/cpu.h> 61 #include <machine/ctlreg.h> 62 #include <sparc/sparc/asm.h> 63 #include <sparc/sparc/vaddrs.h> 64 #include <sparc/sparc/cpuvar.h> 65 66 struct obio4_softc { 67 struct device sc_dev; /* base device */ 68 bus_space_tag_t sc_bustag; /* parent bus tag */ 69 bus_dma_tag_t sc_dmatag; /* parent bus DMA tag */ 70 }; 71 72 union obio_softc { 73 struct device sc_dev; /* base device */ 74 struct obio4_softc sc_obio; /* sun4 obio */ 75 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ 76 }; 77 78 79 /* autoconfiguration driver */ 80 static int obiomatch __P((struct device *, struct cfdata *, void *)); 81 static void obioattach __P((struct device *, struct device *, void *)); 82 83 CFATTACH_DECL(obio, sizeof(union obio_softc), 84 obiomatch, obioattach, NULL, NULL); 85 86 static int obio_attached; 87 88 /* 89 * This `obio4_busattachargs' data structure only exists to pass down 90 * to obiosearch() the name of a device that must be configured early. 91 */ 92 struct obio4_busattachargs { 93 struct mainbus_attach_args *ma; 94 const char *name; 95 }; 96 97 #if defined(SUN4) 98 static int obioprint __P((void *, const char *)); 99 static int obiosearch __P((struct device *, struct cfdata *, 100 const locdesc_t *, void *)); 101 static paddr_t obio_bus_mmap __P((bus_space_tag_t, bus_addr_t, off_t, 102 int, int)); 103 static int _obio_bus_map __P((bus_space_tag_t, bus_addr_t, 104 bus_size_t, int, 105 vaddr_t, bus_space_handle_t *)); 106 107 /* There's at most one obio bus, so we can allocate the bus tag statically */ 108 static struct sparc_bus_space_tag obio_space_tag; 109 #endif 110 111 /* 112 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 113 * Apparently, the `interrupts' property on obio devices is just 114 * the processor IPL. 115 */ 116 static int intr_obio2ipl[] = { 117 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 118 }; 119 120 int 121 obiomatch(parent, cf, aux) 122 struct device *parent; 123 struct cfdata *cf; 124 void *aux; 125 { 126 struct mainbus_attach_args *ma = aux; 127 128 if (obio_attached) 129 return 0; 130 131 return (strcmp(cf->cf_name, ma->ma_name) == 0); 132 } 133 134 void 135 obioattach(parent, self, aux) 136 struct device *parent, *self; 137 void *aux; 138 { 139 struct mainbus_attach_args *ma = aux; 140 141 obio_attached = 1; 142 143 printf("\n"); 144 145 if (CPU_ISSUN4) { 146 #if defined(SUN4) 147 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 148 struct obio4_busattachargs oa; 149 const char *const *cpp; 150 static const char *const special4[] = { 151 /* find these first */ 152 "timer", 153 "dma", /* need this before `esp', if any */ 154 NULL 155 }; 156 157 sc->sc_bustag = ma->ma_bustag; 158 sc->sc_dmatag = ma->ma_dmatag; 159 160 memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); 161 obio_space_tag.cookie = sc; 162 obio_space_tag.parent = sc->sc_bustag; 163 obio_space_tag.sparc_bus_map = _obio_bus_map; 164 obio_space_tag.sparc_bus_mmap = obio_bus_mmap; 165 166 oa.ma = ma; 167 168 /* Find all `early' obio devices */ 169 for (cpp = special4; *cpp != NULL; cpp++) { 170 oa.name = *cpp; 171 config_search_ia(obiosearch, self, "obio", &oa); 172 } 173 174 /* Find all other obio devices */ 175 oa.name = NULL; 176 config_search_ia(obiosearch, self, "obio", &oa); 177 #endif 178 return; 179 } else if (CPU_ISSUN4M) { 180 /* 181 * Attach the on-board I/O bus at on a sun4m. 182 * In this case we treat the obio bus as another sbus slot. 183 */ 184 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 185 186 static const char *const special4m[] = { 187 /* find these first */ 188 "eeprom", 189 "counter", 190 #if 0 /* Not all sun4m's have an `auxio' */ 191 "auxio", 192 #endif 193 "", 194 /* place device to ignore here */ 195 "interrupt", 196 NULL 197 }; 198 199 sc->sc_bustag = ma->ma_bustag; 200 sc->sc_dmatag = ma->ma_dmatag; 201 sc->sc_intr2ipl = intr_obio2ipl; 202 203 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 204 } else { 205 printf("obio on this machine?\n"); 206 } 207 } 208 209 #if defined(SUN4) 210 int 211 obioprint(args, busname) 212 void *args; 213 const char *busname; 214 { 215 union obio_attach_args *uoba = args; 216 struct obio4_attach_args *oba = &uoba->uoba_oba4; 217 218 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 219 if (oba->oba_pri != -1) 220 aprint_normal(" level %d", oba->oba_pri); 221 222 return (UNCONF); 223 } 224 225 int 226 _obio_bus_map(t, ba, size, flags, va, hp) 227 bus_space_tag_t t; 228 bus_addr_t ba; 229 bus_size_t size; 230 int flags; 231 vaddr_t va; 232 bus_space_handle_t *hp; 233 { 234 235 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 236 obio_find_rom_map(ba, size, hp) == 0) 237 return (0); 238 239 return (bus_space_map2(t->parent, ba, size, flags, va, hp)); 240 } 241 242 paddr_t 243 obio_bus_mmap(t, ba, off, prot, flags) 244 bus_space_tag_t t; 245 bus_addr_t ba; 246 off_t off; 247 int prot; 248 int flags; 249 { 250 251 return (bus_space_mmap(t->parent, ba, off, prot, flags)); 252 } 253 254 int 255 obiosearch(parent, cf, ldesc, aux) 256 struct device *parent; 257 struct cfdata *cf; 258 const locdesc_t *ldesc; 259 void *aux; 260 { 261 struct obio4_busattachargs *oap = aux; 262 union obio_attach_args uoba; 263 struct obio4_attach_args *oba = &uoba.uoba_oba4; 264 int addr; 265 266 /* Check whether we're looking for a specifically named device */ 267 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 268 return (0); 269 270 /* 271 * Avoid sun4m entries which don't have valid PAs. 272 * no point in even probing them. 273 */ 274 addr = cf->cf_loc[OBIOCF_ADDR]; 275 if (addr == -1) 276 return (0); 277 278 /* 279 * On the 4/100 obio addresses must be mapped at 280 * 0x0YYYYYYY, but alias higher up (we avoid the 281 * alias condition because it causes pmap difficulties) 282 * XXX: We also assume that 4/[23]00 obio addresses 283 * must be 0xZYYYYYYY, where (Z != 0) 284 */ 285 if (cpuinfo.cpu_type == CPUTYP_4_100 && (addr & 0xf0000000)) 286 return (0); 287 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) 288 return (0); 289 290 uoba.uoba_isobio4 = 1; 291 oba->oba_bustag = &obio_space_tag; 292 oba->oba_dmatag = oap->ma->ma_dmatag; 293 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); 294 oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; 295 296 if (config_match(parent, cf, &uoba) == 0) 297 return (0); 298 299 config_attach(parent, cf, &uoba, obioprint); 300 return (1); 301 } 302 303 304 /* 305 * If we can find a mapping that was established by the rom, use it. 306 * Else, create a new mapping. 307 */ 308 int 309 obio_find_rom_map(ba, len, hp) 310 bus_addr_t ba; 311 int len; 312 bus_space_handle_t *hp; 313 { 314 #define getpte(va) lda(va, ASI_PTE) 315 316 u_long pa, pf; 317 int pgtype; 318 u_long va, pte; 319 320 if (len > PAGE_SIZE) 321 return (EINVAL); 322 323 pa = BUS_ADDR_PADDR(ba); 324 pf = pa >> PGSHIFT; 325 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 326 327 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 328 pte = getpte(va); 329 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 330 (pte & PG_PFNUM) != pf) 331 continue; 332 333 /* 334 * Found entry in PROM's pagetable 335 * note: preserve page offset 336 */ 337 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 338 return (0); 339 } 340 341 return (ENOENT); 342 } 343 #endif /* SUN4 */ 344
Indexes created Wed Sep 24 15:09:51 GMT 2025