obio.c revision 1.69
1 /* $NetBSD: obio.c,v 1.69 2005/11/16 00:49:03 uwe 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 1.69 2005/11/16 00:49:03 uwe 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(struct device *, struct cfdata *, void *); 81 static void obioattach(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(void *, const char *); 99 static int obiosearch(struct device *, struct cfdata *, const int *, void *); 100 static paddr_t obio_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); 101 static int _obio_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, 102 vaddr_t, bus_space_handle_t *); 103 104 /* There's at most one obio bus, so we can allocate the bus tag statically */ 105 static struct sparc_bus_space_tag obio_space_tag; 106 #endif 107 108 /* 109 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 110 * Apparently, the `interrupts' property on obio devices is just 111 * the processor IPL. 112 */ 113 static int intr_obio2ipl[] = { 114 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 115 }; 116 117 static int 118 obiomatch(struct device *parent, struct cfdata *cf, void *aux) 119 { 120 struct mainbus_attach_args *ma = aux; 121 122 if (obio_attached) 123 return 0; 124 125 return (strcmp(cf->cf_name, ma->ma_name) == 0); 126 } 127 128 static void 129 obioattach(struct device *parent, struct device *self, void *aux) 130 { 131 struct mainbus_attach_args *ma = aux; 132 133 obio_attached = 1; 134 135 printf("\n"); 136 137 if (CPU_ISSUN4) { 138 #if defined(SUN4) 139 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 140 struct obio4_busattachargs oa; 141 const char *const *cpp; 142 static const char *const special4[] = { 143 /* find these first */ 144 "timer", 145 "dma", /* need this before `esp', if any */ 146 NULL 147 }; 148 149 sc->sc_bustag = ma->ma_bustag; 150 sc->sc_dmatag = ma->ma_dmatag; 151 152 memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); 153 obio_space_tag.cookie = sc; 154 obio_space_tag.parent = sc->sc_bustag; 155 obio_space_tag.sparc_bus_map = _obio_bus_map; 156 obio_space_tag.sparc_bus_mmap = obio_bus_mmap; 157 158 oa.ma = ma; 159 160 /* Find all `early' obio devices */ 161 for (cpp = special4; *cpp != NULL; cpp++) { 162 oa.name = *cpp; 163 config_search_ia(obiosearch, self, "obio", &oa); 164 } 165 166 /* Find all other obio devices */ 167 oa.name = NULL; 168 config_search_ia(obiosearch, self, "obio", &oa); 169 #endif 170 return; 171 } else if (CPU_ISSUN4M) { 172 /* 173 * Attach the on-board I/O bus at on a sun4m. 174 * In this case we treat the obio bus as another sbus slot. 175 */ 176 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 177 178 static const char *const special4m[] = { 179 /* find these first */ 180 "eeprom", 181 "counter", 182 #if 0 /* Not all sun4m's have an `auxio' */ 183 "auxio", 184 #endif 185 "", 186 /* place device to ignore here */ 187 "interrupt", 188 NULL 189 }; 190 191 sc->sc_bustag = ma->ma_bustag; 192 sc->sc_dmatag = ma->ma_dmatag; 193 sc->sc_intr2ipl = intr_obio2ipl; 194 195 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 196 } else { 197 printf("obio on this machine?\n"); 198 } 199 } 200 201 #if defined(SUN4) 202 static int 203 obioprint(void *args, const char *busname) 204 { 205 union obio_attach_args *uoba = args; 206 struct obio4_attach_args *oba = &uoba->uoba_oba4; 207 208 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 209 if (oba->oba_pri != -1) 210 aprint_normal(" level %d", oba->oba_pri); 211 212 return (UNCONF); 213 } 214 215 static int 216 _obio_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 217 vaddr_t va, bus_space_handle_t *hp) 218 { 219 220 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 221 obio_find_rom_map(ba, size, hp) == 0) 222 return (0); 223 224 return (bus_space_map2(t->parent, ba, size, flags, va, hp)); 225 } 226 227 static paddr_t 228 obio_bus_mmap(bus_space_tag_t t, bus_addr_t ba, off_t off, int prot, int flags) 229 { 230 231 return (bus_space_mmap(t->parent, ba, off, prot, flags)); 232 } 233 234 static int 235 obiosearch(struct device *parent, struct cfdata *cf, const int *ldesc, 236 void *aux) 237 { 238 struct obio4_busattachargs *oap = aux; 239 union obio_attach_args uoba; 240 struct obio4_attach_args *oba = &uoba.uoba_oba4; 241 int addr; 242 243 /* Check whether we're looking for a specifically named device */ 244 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 245 return (0); 246 247 /* 248 * Avoid sun4m entries which don't have valid PAs. 249 * no point in even probing them. 250 */ 251 addr = cf->cf_loc[OBIOCF_ADDR]; 252 if (addr == -1) 253 return (0); 254 255 /* 256 * On the 4/100 obio addresses must be mapped at 257 * 0x0YYYYYYY, but alias higher up (we avoid the 258 * alias condition because it causes pmap difficulties) 259 * XXX: We also assume that 4/[23]00 obio addresses 260 * must be 0xZYYYYYYY, where (Z != 0) 261 */ 262 if (cpuinfo.cpu_type == CPUTYP_4_100 && (addr & 0xf0000000)) 263 return (0); 264 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) 265 return (0); 266 267 uoba.uoba_isobio4 = 1; 268 oba->oba_bustag = &obio_space_tag; 269 oba->oba_dmatag = oap->ma->ma_dmatag; 270 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); 271 oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; 272 273 if (config_match(parent, cf, &uoba) == 0) 274 return (0); 275 276 config_attach(parent, cf, &uoba, obioprint); 277 return (1); 278 } 279 280 281 /* 282 * If we can find a mapping that was established by the rom, use it. 283 * Else, create a new mapping. 284 */ 285 int 286 obio_find_rom_map(bus_addr_t ba, int len, bus_space_handle_t *hp) 287 { 288 #define getpte(va) lda(va, ASI_PTE) 289 290 u_long pa, pf; 291 int pgtype; 292 u_long va, pte; 293 294 if (len > PAGE_SIZE) 295 return (EINVAL); 296 297 pa = BUS_ADDR_PADDR(ba); 298 pf = pa >> PGSHIFT; 299 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 300 301 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 302 pte = getpte(va); 303 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 304 (pte & PG_PFNUM) != pf) 305 continue; 306 307 /* 308 * Found entry in PROM's pagetable 309 * note: preserve page offset 310 */ 311 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 312 return (0); 313 } 314 315 return (ENOENT); 316 } 317 #endif /* SUN4 */ 318
Indexes created Thu Sep 25 08:09:54 GMT 2025