obio.c revision 1.42
1 /* $NetBSD: obio.c,v 1.42 1998/03/29 22:05:05 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 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((void *, bus_type_t, bus_addr_t, int)); 88 static int _obio_bus_map __P((void *, bus_type_t, bus_addr_t, bus_size_t, 89 int, vm_offset_t, bus_space_handle_t *)); 90 91 static struct sparc_bus_space_tag obio_space_tag = { 92 NULL, /* cookie */ 93 _obio_bus_map, /* bus_space_map */ 94 NULL, /* bus_space_unmap */ 95 NULL, /* bus_space_subregion */ 96 NULL, /* bus_space_barrier */ 97 obio_bus_mmap, /* bus_space_mmap */ 98 NULL /* bus_intr_establish */ 99 }; 100 #endif 101 102 /* 103 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 104 * Apparently, the `interrupts' property on obio devices is just 105 * the processor IPL. 106 */ 107 static int intr_obio2ipl[] = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109 }; 110 111 int 112 obiomatch(parent, cf, aux) 113 struct device *parent; 114 struct cfdata *cf; 115 void *aux; 116 { 117 struct mainbus_attach_args *ma = aux; 118 119 return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0); 120 } 121 122 void 123 obioattach(parent, self, aux) 124 struct device *parent, *self; 125 void *aux; 126 { 127 struct mainbus_attach_args *ma = aux; 128 129 /* 130 * There is only one obio bus 131 */ 132 if (self->dv_unit > 0) { 133 printf(" unsupported\n"); 134 return; 135 } 136 printf("\n"); 137 138 if (CPU_ISSUN4) { 139 #if defined(SUN4) 140 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 141 142 sc->sc_bustag = ma->ma_bustag; 143 sc->sc_dmatag = ma->ma_dmatag; 144 145 obio_space_tag.cookie = sc; 146 147 /* Propagate assorted parent functions */ 148 obio_space_tag.sparc_intr_establish = 149 ma->ma_bustag->sparc_intr_establish; 150 obio_space_tag.sparc_bus_unmap = 151 ma->ma_bustag->sparc_bus_unmap; 152 153 (void)config_search(obiosearch, self, aux); 154 #endif 155 return; 156 } else if (CPU_ISSUN4M) { 157 /* 158 * Attach the on-board I/O bus at on a sun4m. 159 * In this case we treat the obio bus as another sbus slot. 160 */ 161 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 162 163 static const char *const special4m[] = { 164 /* find these first */ 165 "eeprom", 166 "counter", 167 #if 0 /* Not all sun4m's have an `auxio' */ 168 "auxio", 169 #endif 170 "", 171 /* place device to ignore here */ 172 "interrupt", 173 NULL 174 }; 175 176 sc->sc_bustag = ma->ma_bustag; 177 sc->sc_dmatag = ma->ma_dmatag; 178 sc->sc_intr2ipl = intr_obio2ipl; 179 180 sbus_attach(sc, "obio", ma->ma_node, ma->ma_bp, special4m); 181 } else { 182 printf("obio on this machine?\n"); 183 } 184 } 185 186 #if defined(SUN4) 187 int 188 obioprint(args, busname) 189 void *args; 190 const char *busname; 191 { 192 union obio_attach_args *uoba = args; 193 struct obio4_attach_args *oba = &uoba->uoba_oba4; 194 195 printf(" addr 0x%lx", (long)oba->oba_paddr); 196 if (oba->oba_pri != -1) 197 printf(" level %d", oba->oba_pri); 198 199 return (UNCONF); 200 } 201 202 int 203 _obio_bus_map(cookie, btype, paddr, size, flags, vaddr, hp) 204 void *cookie; 205 bus_type_t btype; 206 bus_addr_t paddr; 207 bus_size_t size; 208 int flags; 209 vm_offset_t vaddr; 210 bus_space_handle_t *hp; 211 { 212 struct obio4_softc *sc = cookie; 213 214 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 215 obio_find_rom_map(paddr, PMAP_OBIO, size, hp) == 0) 216 return (0); 217 218 return (bus_space_map2(sc->sc_bustag, PMAP_OBIO, paddr, 219 size, flags, vaddr, hp)); 220 } 221 222 int 223 obio_bus_mmap(cookie, btype, paddr, flags) 224 void *cookie; 225 bus_type_t btype; 226 bus_addr_t paddr; 227 int flags; 228 { 229 struct obio4_softc *sc = cookie; 230 231 return (bus_space_mmap(sc->sc_bustag, PMAP_OBIO, paddr, flags)); 232 } 233 234 int 235 obiosearch(parent, cf, aux) 236 struct device *parent; 237 struct cfdata *cf; 238 void *aux; 239 { 240 struct mainbus_attach_args *ma = aux; 241 union obio_attach_args uoba; 242 struct obio4_attach_args *oba = &uoba.uoba_oba4; 243 struct bootpath *bp; 244 245 246 /* 247 * Avoid sun4m entries which don't have valid PAs. 248 * no point in even probing them. 249 */ 250 if (cf->cf_loc[0] == -1) 251 return (0); 252 253 /* 254 * On the 4/100 obio addresses must be mapped at 255 * 0x0YYYYYYY, but alias higher up (we avoid the 256 * alias condition because it causes pmap difficulties) 257 * XXX: We also assume that 4/[23]00 obio addresses 258 * must be 0xZYYYYYYY, where (Z != 0) 259 */ 260 if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000)) 261 return (0); 262 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000)) 263 return (0); 264 265 uoba.uoba_isobio4 = 1; 266 oba->oba_bustag = &obio_space_tag; 267 oba->oba_dmatag = ma->ma_dmatag; 268 oba->oba_paddr = cf->cf_loc[0]; 269 oba->oba_pri = cf->cf_loc[1]; 270 271 bp = ma->ma_bp; 272 if (bp != NULL && strcmp(bp->name, "obio") == 0) 273 oba->oba_bp = bp + 1; 274 else 275 oba->oba_bp = NULL; 276 277 if ((*cf->cf_attach->ca_match)(parent, cf, &uoba) == 0) 278 return (0); 279 280 config_attach(parent, cf, &uoba, obioprint); 281 return (1); 282 } 283 284 285 /* 286 * If we can find a mapping that was established by the rom, use it. 287 * Else, create a new mapping. 288 */ 289 int 290 obio_find_rom_map(pa, iospace, len, hp) 291 bus_addr_t pa; 292 bus_type_t iospace; 293 int len; 294 bus_space_handle_t *hp; 295 { 296 #define getpte(va) lda(va, ASI_PTE) 297 298 u_long pf; 299 int pgtype; 300 u_long va, pte; 301 302 if (len > NBPG) 303 return (EINVAL); 304 305 pf = pa >> PGSHIFT; 306 pgtype = PMAP_T2PTE_4(iospace); 307 308 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) { 309 pte = getpte(va); 310 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 311 (pte & PG_PFNUM) != pf) 312 continue; 313 314 /* 315 * Found entry in PROM's pagetable 316 * note: preserve page offset 317 */ 318 *hp = (bus_space_handle_t)(va | ((u_long)pa & PGOFSET)); 319 return (0); 320 } 321 322 return (ENOENT); 323 } 324 #endif /* SUN4 */ 325
Indexes created Mon Sep 22 13:09:51 GMT 2025