1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 4 * Copyright 2006 by Marius Strobl <marius@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software and 8 * its documentation for any purpose and without fee is hereby 9 * granted, provided that both the above copyright notice and this 10 * permission notice appear in all copies, that both the above 11 * copyright notice and this permission notice appear in all 12 * supporting documentation, and that the name of M.I.T. not be used 13 * in advertising or publicity pertaining to distribution of the 14 * software without specific, written prior permission. M.I.T. makes 15 * no representations about the suitability of this software for any 16 * purpose. It is provided "as is" without express or implied 17 * warranty. 18 * 19 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 20 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 23 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/endian.h> 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/kdb.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/pcpu.h> 47 #include <sys/rman.h> 48 #include <sys/smp.h> 49 50 #include <vm/vm.h> 51 #include <vm/pmap.h> 52 53 #include <dev/ofw/ofw_bus.h> 54 #include <dev/ofw/ofw_bus_subr.h> 55 #include <dev/ofw/openfirm.h> 56 57 #include <machine/bus.h> 58 #include <machine/intr_machdep.h> 59 #include <machine/resource.h> 60 61 /* 62 * The nexus handles root-level resource allocation requests and interrupt 63 * mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY(). 64 */ 65 66 static device_probe_t nexus_probe; 67 static device_attach_t nexus_attach; 68 static bus_setup_intr_t nexus_setup_intr; 69 static bus_teardown_intr_t nexus_teardown_intr; 70 static bus_activate_resource_t nexus_activate_resource; 71 static bus_deactivate_resource_t nexus_deactivate_resource; 72 static int nexus_map_resource(device_t bus, device_t child, int type, 73 struct resource *r, 74 struct resource_map_request *argsp, 75 struct resource_map *map); 76 static int nexus_unmap_resource(device_t bus, device_t child, int type, 77 struct resource *r, struct resource_map *map); 78 79 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); 80 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t, 81 cpuset_t *); 82 #ifdef SMP 83 static bus_bind_intr_t nexus_bind_intr; 84 #endif 85 static bus_config_intr_t nexus_config_intr; 86 static ofw_bus_map_intr_t nexus_ofw_map_intr; 87 88 static device_method_t nexus_methods[] = { 89 /* Device interface */ 90 DEVMETHOD(device_probe, nexus_probe), 91 DEVMETHOD(device_attach, nexus_attach), 92 93 /* Bus interface */ 94 DEVMETHOD(bus_add_child, bus_generic_add_child), 95 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 96 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 97 DEVMETHOD(bus_map_resource, nexus_map_resource), 98 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource), 99 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 100 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 101 #ifdef SMP 102 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 103 #endif 104 DEVMETHOD(bus_config_intr, nexus_config_intr), 105 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), 106 DEVMETHOD(bus_get_cpus, nexus_get_cpus), 107 108 /* ofw_bus interface */ 109 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), 110 111 DEVMETHOD_END 112 }; 113 114 static devclass_t nexus_devclass; 115 116 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 117 EARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0, 118 BUS_PASS_BUS); 119 MODULE_VERSION(nexus, 1); 120 121 static int 122 nexus_probe(device_t dev) 123 { 124 125 device_quiet(dev); /* suppress attach message for neatness */ 126 127 return (BUS_PROBE_DEFAULT); 128 } 129 130 static int 131 nexus_attach(device_t dev) 132 { 133 134 bus_generic_probe(dev); 135 bus_generic_attach(dev); 136 137 return (0); 138 } 139 140 static int 141 nexus_setup_intr(device_t bus __unused, device_t child, struct resource *r, 142 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, 143 void **cookiep) 144 { 145 int error, domain; 146 147 if (r == NULL) 148 panic("%s: NULL interrupt resource!", __func__); 149 150 if (cookiep != NULL) 151 *cookiep = NULL; 152 if ((rman_get_flags(r) & RF_SHAREABLE) == 0) 153 flags |= INTR_EXCL; 154 155 /* We depend here on rman_activate_resource() being idempotent. */ 156 error = rman_activate_resource(r); 157 if (error) 158 return (error); 159 160 if (bus_get_domain(child, &domain) != 0) { 161 if(bootverbose) 162 device_printf(child, "no domain found\n"); 163 domain = 0; 164 } 165 error = powerpc_setup_intr(device_get_nameunit(child), 166 rman_get_start(r), filt, intr, arg, flags, cookiep, domain); 167 168 return (error); 169 } 170 171 static int 172 nexus_teardown_intr(device_t bus __unused, device_t child __unused, 173 struct resource *r, void *ih) 174 { 175 176 if (r == NULL) 177 return (EINVAL); 178 179 return (powerpc_teardown_intr(ih)); 180 } 181 182 static bus_space_tag_t 183 nexus_get_bus_tag(device_t bus __unused, device_t child __unused) 184 { 185 186 #if BYTE_ORDER == LITTLE_ENDIAN 187 return(&bs_le_tag); 188 #else 189 return(&bs_be_tag); 190 #endif 191 } 192 193 static int 194 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 195 cpuset_t *cpuset) 196 { 197 198 switch (op) { 199 #ifdef SMP 200 case INTR_CPUS: 201 if (setsize != sizeof(cpuset_t)) 202 return (EINVAL); 203 *cpuset = all_cpus; 204 return (0); 205 #endif 206 default: 207 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 208 } 209 } 210 211 #ifdef SMP 212 static int 213 nexus_bind_intr(device_t bus __unused, device_t child __unused, 214 struct resource *r, int cpu) 215 { 216 217 return (powerpc_bind_intr(rman_get_start(r), cpu)); 218 } 219 #endif 220 221 static int 222 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 223 enum intr_polarity pol) 224 { 225 226 return (powerpc_config_intr(irq, trig, pol)); 227 } 228 229 static int 230 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, 231 pcell_t *irq) 232 { 233 u_int intr = MAP_IRQ(iparent, irq[0]); 234 if (icells > 1) 235 powerpc_fw_config_intr(intr, irq[1]); 236 return (intr); 237 } 238 239 static int 240 nexus_activate_resource(device_t bus __unused, device_t child __unused, 241 int type, int rid __unused, struct resource *r) 242 { 243 244 if (type == SYS_RES_MEMORY) { 245 vm_paddr_t start; 246 void *p; 247 248 start = (vm_paddr_t) rman_get_start(r); 249 if (bootverbose) 250 printf("nexus mapdev: start %jx, len %jd\n", 251 (uintmax_t)start, rman_get_size(r)); 252 253 p = pmap_mapdev(start, (vm_size_t) rman_get_size(r)); 254 if (p == NULL) 255 return (ENOMEM); 256 rman_set_virtual(r, p); 257 rman_set_bustag(r, &bs_be_tag); 258 rman_set_bushandle(r, (u_long)p); 259 } 260 return (rman_activate_resource(r)); 261 } 262 263 static int 264 nexus_deactivate_resource(device_t bus __unused, device_t child __unused, 265 int type __unused, int rid __unused, struct resource *r) 266 { 267 268 /* 269 * If this is a memory resource, unmap it. 270 */ 271 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 272 bus_size_t psize; 273 274 psize = rman_get_size(r); 275 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); 276 } 277 278 return (rman_deactivate_resource(r)); 279 } 280 281 282 static int 283 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, 284 struct resource_map_request *argsp, struct resource_map *map) 285 { 286 287 struct resource_map_request args; 288 rman_res_t end, length, start; 289 290 /* Resources must be active to be mapped. */ 291 if (!(rman_get_flags(r) & RF_ACTIVE)) 292 return (ENXIO); 293 294 /* Mappings are only supported on I/O and memory resources. */ 295 switch (type) { 296 case SYS_RES_IOPORT: 297 case SYS_RES_MEMORY: 298 break; 299 default: 300 return (EINVAL); 301 } 302 303 resource_init_map_request(&args); 304 if (argsp != NULL) 305 bcopy(argsp, &args, imin(argsp->size, args.size)); 306 307 start = rman_get_start(r) + args.offset; 308 if (args.length == 0) 309 length = rman_get_size(r); 310 else 311 length = args.length; 312 313 end = start + length - 1; 314 if (start > rman_get_end(r) || start < rman_get_start(r)) 315 return (EINVAL); 316 317 if (end > rman_get_end(r) || end < start) 318 return (EINVAL); 319 320 /* 321 * If this is a memory resource, map it into the kernel. 322 */ 323 switch (type) { 324 case SYS_RES_IOPORT: 325 panic("%s:%d SYS_RES_IOPORT handling not implemented", __func__, __LINE__); 326 /* XXX: untested 327 map->r_bushandle = start; 328 map->r_bustag = nexus_get_bus_tag(NULL, NULL); 329 map->r_size = length; 330 map->r_vaddr = NULL; 331 */ 332 break; 333 case SYS_RES_MEMORY: 334 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 335 map->r_bustag = nexus_get_bus_tag(NULL, NULL); 336 map->r_size = length; 337 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 338 break; 339 } 340 341 return (0); 342 343 } 344 345 static int 346 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r, 347 struct resource_map *map) 348 { 349 350 /* 351 * If this is a memory resource, unmap it. 352 */ 353 switch (type) { 354 case SYS_RES_MEMORY: 355 pmap_unmapdev((vm_offset_t)map->r_vaddr, map->r_size); 356 /* FALLTHROUGH */ 357 case SYS_RES_IOPORT: 358 break; 359 default: 360 return (EINVAL); 361 } 362 363 return (0); 364 365 } 366