1 /* $NetBSD: obio.c,v 1.66 2004/12/14 02:32:03 chs 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 1.66 2004/12/14 02:32:03 chs 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 *, void *)); 100 static paddr_t obio_bus_mmap __P((bus_space_tag_t, bus_addr_t, off_t, 101 int, int)); 102 static int _obio_bus_map __P((bus_space_tag_t, bus_addr_t, 103 bus_size_t, int, 104 vaddr_t, bus_space_handle_t *)); 105 106 /* There's at most one obio bus, so we can allocate the bus tag statically */ 107 static struct sparc_bus_space_tag obio_space_tag; 108 #endif 109 110 /* 111 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 112 * Apparently, the `interrupts' property on obio devices is just 113 * the processor IPL. 114 */ 115 static int intr_obio2ipl[] = { 116 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 117 }; 118 119 int 120 obiomatch(parent, cf, aux) 121 struct device *parent; 122 struct cfdata *cf; 123 void *aux; 124 { 125 struct mainbus_attach_args *ma = aux; 126 127 if (obio_attached) 128 return 0; 129 130 return (strcmp(cf->cf_name, ma->ma_name) == 0); 131 } 132 133 void 134 obioattach(parent, self, aux) 135 struct device *parent, *self; 136 void *aux; 137 { 138 struct mainbus_attach_args *ma = aux; 139 140 obio_attached = 1; 141 142 printf("\n"); 143 144 if (CPU_ISSUN4) { 145 #if defined(SUN4) 146 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 147 struct obio4_busattachargs oa; 148 const char *const *cpp; 149 static const char *const special4[] = { 150 /* find these first */ 151 "timer", 152 "dma", /* need this before `esp', if any */ 153 NULL 154 }; 155 156 sc->sc_bustag = ma->ma_bustag; 157 sc->sc_dmatag = ma->ma_dmatag; 158 159 memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); 160 obio_space_tag.cookie = sc; 161 obio_space_tag.parent = sc->sc_bustag; 162 obio_space_tag.sparc_bus_map = _obio_bus_map; 163 obio_space_tag.sparc_bus_mmap = obio_bus_mmap; 164 165 oa.ma = ma; 166 167 /* Find all `early' obio devices */ 168 for (cpp = special4; *cpp != NULL; cpp++) { 169 oa.name = *cpp; 170 (void)config_search(obiosearch, self, &oa); 171 } 172 173 /* Find all other obio devices */ 174 oa.name = NULL; 175 (void)config_search(obiosearch, self, &oa); 176 #endif 177 return; 178 } else if (CPU_ISSUN4M) { 179 /* 180 * Attach the on-board I/O bus at on a sun4m. 181 * In this case we treat the obio bus as another sbus slot. 182 */ 183 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 184 185 static const char *const special4m[] = { 186 /* find these first */ 187 "eeprom", 188 "counter", 189 #if 0 /* Not all sun4m's have an `auxio' */ 190 "auxio", 191 #endif 192 "", 193 /* place device to ignore here */ 194 "interrupt", 195 NULL 196 }; 197 198 sc->sc_bustag = ma->ma_bustag; 199 sc->sc_dmatag = ma->ma_dmatag; 200 sc->sc_intr2ipl = intr_obio2ipl; 201 202 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 203 } else { 204 printf("obio on this machine?\n"); 205 } 206 } 207 208 #if defined(SUN4) 209 int 210 obioprint(args, busname) 211 void *args; 212 const char *busname; 213 { 214 union obio_attach_args *uoba = args; 215 struct obio4_attach_args *oba = &uoba->uoba_oba4; 216 217 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 218 if (oba->oba_pri != -1) 219 aprint_normal(" level %d", oba->oba_pri); 220 221 return (UNCONF); 222 } 223 224 int 225 _obio_bus_map(t, ba, size, flags, va, hp) 226 bus_space_tag_t t; 227 bus_addr_t ba; 228 bus_size_t size; 229 int flags; 230 vaddr_t va; 231 bus_space_handle_t *hp; 232 { 233 234 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 235 obio_find_rom_map(ba, size, hp) == 0) 236 return (0); 237 238 return (bus_space_map2(t->parent, ba, size, flags, va, hp)); 239 } 240 241 paddr_t 242 obio_bus_mmap(t, ba, off, prot, flags) 243 bus_space_tag_t t; 244 bus_addr_t ba; 245 off_t off; 246 int prot; 247 int flags; 248 { 249 250 return (bus_space_mmap(t->parent, ba, off, prot, flags)); 251 } 252 253 int 254 obiosearch(parent, cf, aux) 255 struct device *parent; 256 struct cfdata *cf; 257 void *aux; 258 { 259 struct obio4_busattachargs *oap = aux; 260 union obio_attach_args uoba; 261 struct obio4_attach_args *oba = &uoba.uoba_oba4; 262 int addr; 263 264 /* Check whether we're looking for a specifically named device */ 265 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 266 return (0); 267 268 /* 269 * Avoid sun4m entries which don't have valid PAs. 270 * no point in even probing them. 271 */ 272 addr = cf->cf_loc[OBIOCF_ADDR]; 273 if (addr == -1) 274 return (0); 275 276 /* 277 * On the 4/100 obio addresses must be mapped at 278 * 0x0YYYYYYY, but alias higher up (we avoid the 279 * alias condition because it causes pmap difficulties) 280 * XXX: We also assume that 4/[23]00 obio addresses 281 * must be 0xZYYYYYYY, where (Z != 0) 282 */ 283 if (cpuinfo.cpu_type == CPUTYP_4_100 && (addr & 0xf0000000)) 284 return (0); 285 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) 286 return (0); 287 288 uoba.uoba_isobio4 = 1; 289 oba->oba_bustag = &obio_space_tag; 290 oba->oba_dmatag = oap->ma->ma_dmatag; 291 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); 292 oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; 293 294 if (config_match(parent, cf, &uoba) == 0) 295 return (0); 296 297 config_attach(parent, cf, &uoba, obioprint); 298 return (1); 299 } 300 301 302 /* 303 * If we can find a mapping that was established by the rom, use it. 304 * Else, create a new mapping. 305 */ 306 int 307 obio_find_rom_map(ba, len, hp) 308 bus_addr_t ba; 309 int len; 310 bus_space_handle_t *hp; 311 { 312 #define getpte(va) lda(va, ASI_PTE) 313 314 u_long pa, pf; 315 int pgtype; 316 u_long va, pte; 317 318 if (len > PAGE_SIZE) 319 return (EINVAL); 320 321 pa = BUS_ADDR_PADDR(ba); 322 pf = pa >> PGSHIFT; 323 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 324 325 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 326 pte = getpte(va); 327 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 328 (pte & PG_PFNUM) != pf) 329 continue; 330 331 /* 332 * Found entry in PROM's pagetable 333 * note: preserve page offset 334 */ 335 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 336 return (0); 337 } 338 339 return (ENOENT); 340 } 341 #endif /* SUN4 */ 342