obio.c revision 1.73
1 /* $NetBSD: obio.c,v 1.73 2012/10/27 17:18:11 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 * 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 1.73 2012/10/27 17:18:11 chs 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 <sys/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 device_t 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 obio4_softc sc_obio; /* sun4 obio */ 67 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ 68 }; 69 70 71 /* autoconfiguration driver */ 72 static int obiomatch(device_t, cfdata_t, void *); 73 static void obioattach(device_t, device_t, void *); 74 75 CFATTACH_DECL_NEW(obio, sizeof(union obio_softc), 76 obiomatch, obioattach, NULL, NULL); 77 78 static int obio_attached; 79 80 /* 81 * This `obio4_busattachargs' data structure only exists to pass down 82 * to obiosearch() the name of a device that must be configured early. 83 */ 84 struct obio4_busattachargs { 85 struct mainbus_attach_args *ma; 86 const char *name; 87 }; 88 89 #if defined(SUN4) 90 static int obioprint(void *, const char *); 91 static int obiosearch(device_t, struct cfdata *, const int *, void *); 92 static paddr_t obio_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); 93 static int _obio_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, 94 vaddr_t, bus_space_handle_t *); 95 96 /* There's at most one obio bus, so we can allocate the bus tag statically */ 97 static struct sparc_bus_space_tag obio_space_tag; 98 #endif 99 100 /* 101 * Translate obio `interrupts' property value to processor IPL (see sbus.c) 102 * Apparently, the `interrupts' property on obio devices is just 103 * the processor IPL. 104 */ 105 static int intr_obio2ipl[] = { 106 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 107 }; 108 109 static int 110 obiomatch(device_t parent, struct cfdata *cf, void *aux) 111 { 112 struct mainbus_attach_args *ma = aux; 113 114 if (obio_attached) 115 return 0; 116 117 return (strcmp(cf->cf_name, ma->ma_name) == 0); 118 } 119 120 static void 121 obioattach(device_t parent, device_t self, void *aux) 122 { 123 struct mainbus_attach_args *ma = aux; 124 125 obio_attached = 1; 126 127 printf("\n"); 128 129 if (CPU_ISSUN4) { 130 #if defined(SUN4) 131 union obio_softc *usc = device_private(self); 132 struct obio4_softc *sc = &usc->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_dev = self; 143 sc->sc_bustag = ma->ma_bustag; 144 sc->sc_dmatag = ma->ma_dmatag; 145 146 memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); 147 obio_space_tag.cookie = sc; 148 obio_space_tag.parent = sc->sc_bustag; 149 obio_space_tag.sparc_bus_map = _obio_bus_map; 150 obio_space_tag.sparc_bus_mmap = obio_bus_mmap; 151 152 oa.ma = ma; 153 154 /* Find all `early' obio devices */ 155 for (cpp = special4; *cpp != NULL; cpp++) { 156 oa.name = *cpp; 157 config_search_ia(obiosearch, self, "obio", &oa); 158 } 159 160 /* Find all other obio devices */ 161 oa.name = NULL; 162 config_search_ia(obiosearch, self, "obio", &oa); 163 #endif 164 return; 165 } else if (CPU_ISSUN4M) { 166 /* 167 * Attach the on-board I/O bus at on a sun4m. 168 * In this case we treat the obio bus as another sbus slot. 169 */ 170 union obio_softc *usc = device_private(self); 171 struct sbus_softc *sc = &usc->sc_sbus; 172 173 static const char *const special4m[] = { 174 /* find these first */ 175 "eeprom", 176 "counter", 177 #if 0 /* Not all sun4m's have an `auxio' */ 178 "auxio", 179 #endif 180 "", 181 /* place device to ignore here */ 182 "interrupt", 183 NULL 184 }; 185 186 sc->sc_dev = self; 187 sc->sc_bustag = ma->ma_bustag; 188 sc->sc_dmatag = ma->ma_dmatag; 189 sc->sc_intr2ipl = intr_obio2ipl; 190 191 sbus_attach_common(sc, "obio", ma->ma_node, special4m); 192 } else { 193 printf("obio on this machine?\n"); 194 } 195 } 196 197 #if defined(SUN4) 198 static int 199 obioprint(void *args, const char *busname) 200 { 201 union obio_attach_args *uoba = args; 202 struct obio4_attach_args *oba = &uoba->uoba_oba4; 203 204 aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); 205 if (oba->oba_pri != -1) 206 aprint_normal(" level %d", oba->oba_pri); 207 208 return (UNCONF); 209 } 210 211 static int 212 _obio_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 213 vaddr_t va, bus_space_handle_t *hp) 214 { 215 216 if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && 217 obio_find_rom_map(ba, size, hp) == 0) 218 return (0); 219 220 return (bus_space_map2(t->parent, ba, size, flags, va, hp)); 221 } 222 223 static paddr_t 224 obio_bus_mmap(bus_space_tag_t t, bus_addr_t ba, off_t off, int prot, int flags) 225 { 226 227 return (bus_space_mmap(t->parent, ba, off, prot, flags)); 228 } 229 230 static int 231 obiosearch(device_t parent, struct cfdata *cf, const int *ldesc, 232 void *aux) 233 { 234 struct obio4_busattachargs *oap = aux; 235 union obio_attach_args uoba; 236 struct obio4_attach_args *oba = &uoba.uoba_oba4; 237 int addr; 238 239 /* Check whether we're looking for a specifically named device */ 240 if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) 241 return (0); 242 243 /* 244 * Avoid sun4m entries which don't have valid PAs. 245 * no point in even probing them. 246 */ 247 addr = cf->cf_loc[OBIOCF_ADDR]; 248 if (addr == -1) 249 return (0); 250 251 /* 252 * On the 4/100 obio addresses must be mapped at 253 * 0x0YYYYYYY, but alias higher up (we avoid the 254 * alias condition because it causes pmap difficulties) 255 * XXX: We also assume that 4/[23]00 obio addresses 256 * must be 0xZYYYYYYY, where (Z != 0) 257 */ 258 if (cpuinfo.cpu_type == CPUTYP_4_100 && (addr & 0xf0000000)) 259 return (0); 260 if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) 261 return (0); 262 263 uoba.uoba_isobio4 = 1; 264 oba->oba_bustag = &obio_space_tag; 265 oba->oba_dmatag = oap->ma->ma_dmatag; 266 oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); 267 oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; 268 269 if (config_match(parent, cf, &uoba) == 0) 270 return (0); 271 272 config_attach(parent, cf, &uoba, obioprint); 273 return (1); 274 } 275 276 277 /* 278 * If we can find a mapping that was established by the rom, use it. 279 * Else, create a new mapping. 280 */ 281 int 282 obio_find_rom_map(bus_addr_t ba, int len, bus_space_handle_t *hp) 283 { 284 #define getpte(va) lda(va, ASI_PTE) 285 286 u_long pa, pf; 287 int pgtype; 288 u_long va, pte; 289 290 if (len > PAGE_SIZE) 291 return (EINVAL); 292 293 pa = BUS_ADDR_PADDR(ba); 294 pf = pa >> PGSHIFT; 295 pgtype = PMAP_T2PTE_4(PMAP_OBIO); 296 297 for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 298 pte = getpte(va); 299 if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || 300 (pte & PG_PFNUM) != pf) 301 continue; 302 303 /* 304 * Found entry in PROM's pagetable 305 * note: preserve page offset 306 */ 307 *hp = (bus_space_handle_t)(va | (pa & PGOFSET)); 308 return (0); 309 } 310 311 return (ENOENT); 312 } 313 #endif /* SUN4 */ 314
Indexes created Tue Sep 23 07:09:52 GMT 2025