obio.c revision 1.70
1 /* $NetBSD: obio.c,v 1.70 2008/04/28 20:23:35 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.70 2008/04/28 20:23:35 martin Exp $"); 34 35 #include "locators.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/malloc.h> 41 42 #ifdef DEBUG 43 #include <sys/proc.h> 44 #include <sys/syslog.h> 45 #endif 46 47 #include <uvm/uvm_extern.h> 48 49 #include <machine/bus.h> 50 #include <sparc/dev/sbusvar.h> 51 #include <machine/autoconf.h> 52 #include <machine/oldmon.h> 53 #include <machine/cpu.h> 54 #include <machine/ctlreg.h> 55 #include <sparc/sparc/asm.h> 56 #include <sparc/sparc/vaddrs.h> 57 #include <sparc/sparc/cpuvar.h> 58 59 struct obio4_softc { 60 struct device sc_dev; /* base device */ 61 bus_space_tag_t sc_bustag; /* parent bus tag */ 62 bus_dma_tag_t sc_dmatag; /* parent bus DMA tag */ 63 }; 64 65 union obio_softc { 66 struct device sc_dev; /* base device */ 67 struct obio4_softc sc_obio; /* sun4 obio */ 68 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ 69 }; 70 71 72 /* autoconfiguration driver */ 73 static int obiomatch(struct device *, struct cfdata *, void *); 74 static void obioattach(struct device *, struct device *, void *); 75 76 CFATTACH_DECL(obio, sizeof(union obio_softc), 77 obiomatch, obioattach, NULL, NULL); 78 79 static int obio_attached; 80 81 /* 82 * This `obio4_busattachargs' data structure only exists to pass down 83 * to obiosearch() the name of a device that must be configured early. 84 */ 85 struct obio4_busattachargs { 86 struct mainbus_attach_args *ma; 87 const char *name; 88 }; 89 90 #if defined(SUN4) 91 static int obioprint(void *, const char *); 92 static int obiosearch(struct device *, struct cfdata *, const int *, void *); 93 static paddr_t obio_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); 94 static int _obio_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, 95 vaddr_t, bus_space_handle_t *); 96 97 /* There's at most one obio bus, so we can allocate the bus tag statically */ 98 static struct sparc_bus_space_tag obio_space_tag; 99 #endif 100 101 /* 102 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 103 * Apparently, the `interrupts' property on obio devices is just 104 * the processor IPL. 105 */ 106 static int intr_obio2ipl[] = { 107 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 108 }; 109 110 static int 111 obiomatch(struct device *parent, struct cfdata *cf, void *aux) 112 { 113 struct mainbus_attach_args *ma = aux; 114 115 if (obio_attached) 116 return 0; 117 118 return (strcmp(cf->cf_name, ma->ma_name) == 0); 119 } 120 121 static void 122 obioattach(struct device *parent, struct device *self, void *aux) 123 { 124 struct mainbus_attach_args *ma = aux; 125 126 obio_attached = 1; 127 128 printf("\n"); 129 130 if (CPU_ISSUN4) { 131 #if defined(SUN4) 132 struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; 133 struct obio4_busattachargs oa; 134 const char *const *cpp; 135 static const char *const special4[] = { 136 /* find these first */ 137 "timer", 138 "dma", /* need this before `esp', if any */ 139 NULL 140 }; 141 142 sc->sc_bustag = ma->ma_bustag; 143 sc->sc_dmatag = ma->ma_dmatag; 144 145 memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); 146 obio_space_tag.cookie = sc; 147 obio_space_tag.parent = sc->sc_bustag; 148 obio_space_tag.sparc_bus_map = _obio_bus_map; 149 obio_space_tag.sparc_bus_mmap = obio_bus_mmap; 150 151 oa.ma = ma; 152 153 /* Find all `early' obio devices */ 154 for (cpp = special4; *cpp != NULL; cpp++) { 155 oa.name = *cpp; 156 config_search_ia(obiosearch, self, "obio", &oa); 157 } 158 159 /* Find all other obio devices */ 160 oa.name = NULL; 161 config_search_ia(obiosearch, self, "obio", &oa); 162 #endif 163 return; 164 } else if (CPU_ISSUN4M) { 165 /* 166 * Attach the on-board I/O bus at on a sun4m. 167 * In this case we treat the obio bus as another sbus slot. 168 */ 169 struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; 170 171 static const char *const special4m[] = { 172 /* find these first */ 173 "eeprom", 174 "counter", 175 #if 0 /* Not all sun4m's have an `auxio' */ 176 "auxio", 177 #endif 178 "", 179 /* place device to ignore here */ 180 "interrupt", 181 NULL 182 }; 183 184 sc->sc_bustag = ma->ma_bustag; 185 sc->sc_dmatag = ma->ma_dmatag; 186 sc->sc_intr2ipl = intr_obio2ipl; 187 188 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 189 } else { 190 printf("obio on this machine?\n"); 191 } 192 } 193 194 #if defined(SUN4) 195 static int 196 obioprint(void *args, const char *busname) 197 { 198 union obio_attach_args *uoba = args; 199 struct obio4_attach_args *oba = &uoba->uoba_oba4; 200 201 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 202 if (oba->oba_pri != -1) 203 aprint_normal(" level %d", oba->oba_pri); 204 205 return (UNCONF); 206 } 207 208 static int 209 _obio_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 210 vaddr_t va, bus_space_handle_t *hp) 211 { 212 213 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 214 obio_find_rom_map(ba, size, hp) == 0) 215 return (0); 216 217 return (bus_space_map2(t->parent, ba, size, flags, va, hp)); 218 } 219 220 static paddr_t 221 obio_bus_mmap(bus_space_tag_t t, bus_addr_t ba, off_t off, int prot, int flags) 222 { 223 224 return (bus_space_mmap(t->parent, ba, off, prot, flags)); 225 } 226 227 static int 228 obiosearch(struct device *parent, struct cfdata *cf, const int *ldesc, 229 void *aux) 230 { 231 struct obio4_busattachargs *oap = aux; 232 union obio_attach_args uoba; 233 struct obio4_attach_args *oba = &uoba.uoba_oba4; 234 int addr; 235 236 /* Check whether we're looking for a specifically named device */ 237 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 238 return (0); 239 240 /* 241 * Avoid sun4m entries which don't have valid PAs. 242 * no point in even probing them. 243 */ 244 addr = cf->cf_loc[OBIOCF_ADDR]; 245 if (addr == -1) 246 return (0); 247 248 /* 249 * On the 4/100 obio addresses must be mapped at 250 * 0x0YYYYYYY, but alias higher up (we avoid the 251 * alias condition because it causes pmap difficulties) 252 * XXX: We also assume that 4/[23]00 obio addresses 253 * must be 0xZYYYYYYY, where (Z != 0) 254 */ 255 if (cpuinfo.cpu_type == CPUTYP_4_100 && (addr & 0xf0000000)) 256 return (0); 257 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) 258 return (0); 259 260 uoba.uoba_isobio4 = 1; 261 oba->oba_bustag = &obio_space_tag; 262 oba->oba_dmatag = oap->ma->ma_dmatag; 263 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); 264 oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; 265 266 if (config_match(parent, cf, &uoba) == 0) 267 return (0); 268 269 config_attach(parent, cf, &uoba, obioprint); 270 return (1); 271 } 272 273 274 /* 275 * If we can find a mapping that was established by the rom, use it. 276 * Else, create a new mapping. 277 */ 278 int 279 obio_find_rom_map(bus_addr_t ba, int len, bus_space_handle_t *hp) 280 { 281 #define getpte(va) lda(va, ASI_PTE) 282 283 u_long pa, pf; 284 int pgtype; 285 u_long va, pte; 286 287 if (len > PAGE_SIZE) 288 return (EINVAL); 289 290 pa = BUS_ADDR_PADDR(ba); 291 pf = pa >> PGSHIFT; 292 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 293 294 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 295 pte = getpte(va); 296 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 297 (pte & PG_PFNUM) != pf) 298 continue; 299 300 /* 301 * Found entry in PROM's pagetable 302 * note: preserve page offset 303 */ 304 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 305 return (0); 306 } 307 308 return (ENOENT); 309 } 310 #endif /* SUN4 */ 311
Indexes created Fri Oct 03 02:09:57 GMT 2025