| 1 | /* |
| 2 | * Copyright 1998 Massachusetts Institute of Technology |
| 3 | * Copyright (c) 2008 The DragonFly Project. |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute this software and |
| 6 | * its documentation for any purpose and without fee is hereby |
| 7 | * granted, provided that both the above copyright notice and this |
| 8 | * permission notice appear in all copies, that both the above |
| 9 | * copyright notice and this permission notice appear in all |
| 10 | * supporting documentation, and that the name of M.I.T. not be used |
| 11 | * in advertising or publicity pertaining to distribution of the |
| 12 | * software without specific, written prior permission. M.I.T. makes |
| 13 | * no representations about the suitability of this software for any |
| 14 | * purpose. It is provided "as is" without express or implied |
| 15 | * warranty. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS |
| 18 | * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 19 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT |
| 21 | * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 24 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 27 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | * |
| 30 | * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $ |
| 31 | * $DragonFly: src/sys/platform/pc64/amd64/nexus.c,v 1.1 2008/08/29 17:07:10 dillon Exp $ |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * This code implements a `root nexus' for Intel Architecture |
| 36 | * machines. The function of the root nexus is to serve as an |
| 37 | * attachment point for both processors and buses, and to manage |
| 38 | * resources which are common to all of them. In particular, |
| 39 | * this code implements the core resource managers for interrupt |
| 40 | * requests, DMA requests (which rightfully should be a part of the |
| 41 | * ISA code but it's easier to do it here for now), I/O port addresses, |
| 42 | * and I/O memory address space. |
| 43 | */ |
| 44 | |
| 45 | #include <sys/param.h> |
| 46 | #include <sys/systm.h> |
| 47 | #include <sys/bus.h> |
| 48 | #include <sys/kernel.h> |
| 49 | #include <sys/malloc.h> |
| 50 | #include <sys/module.h> |
| 51 | #include <sys/rman.h> |
| 52 | |
| 53 | #include <machine/vmparam.h> |
| 54 | #include <vm/vm.h> |
| 55 | #include <vm/pmap.h> |
| 56 | #include <machine/pmap.h> |
| 57 | |
| 58 | #include <machine/nexusvar.h> |
| 59 | #include <machine/smp.h> |
| 60 | #include <machine_base/apic/mpapic.h> |
| 61 | #include <machine_base/isa/intr_machdep.h> |
| 62 | |
| 63 | #define I386_BUS_SPACE_IO 0 /* space is i/o space */ |
| 64 | #define I386_BUS_SPACE_MEM 1 /* space is mem space */ |
| 65 | |
| 66 | static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); |
| 67 | struct nexus_device { |
| 68 | struct resource_list nx_resources; |
| 69 | int nx_pcibus; |
| 70 | }; |
| 71 | |
| 72 | #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) |
| 73 | |
| 74 | static struct rman irq_rman, drq_rman, port_rman, mem_rman; |
| 75 | |
| 76 | static int nexus_probe(device_t); |
| 77 | static int nexus_attach(device_t); |
| 78 | static int nexus_print_all_resources(device_t dev); |
| 79 | static int nexus_print_child(device_t, device_t); |
| 80 | static device_t nexus_add_child(device_t bus, device_t parent, int order, |
| 81 | const char *name, int unit); |
| 82 | static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, |
| 83 | u_long, u_long, u_long, u_int); |
| 84 | static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); |
| 85 | static int nexus_write_ivar(device_t, device_t, int, uintptr_t); |
| 86 | static int nexus_activate_resource(device_t, device_t, int, int, |
| 87 | struct resource *); |
| 88 | static int nexus_deactivate_resource(device_t, device_t, int, int, |
| 89 | struct resource *); |
| 90 | static int nexus_release_resource(device_t, device_t, int, int, |
| 91 | struct resource *); |
| 92 | static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, |
| 93 | void (*)(void *), void *, |
| 94 | void **, lwkt_serialize_t); |
| 95 | static int nexus_teardown_intr(device_t, device_t, struct resource *, |
| 96 | void *); |
| 97 | static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); |
| 98 | static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *); |
| 99 | static void nexus_delete_resource(device_t, device_t, int, int); |
| 100 | |
| 101 | /* |
| 102 | * The device_identify method will cause nexus to automatically associate |
| 103 | * and attach to the root bus. |
| 104 | */ |
| 105 | static device_method_t nexus_methods[] = { |
| 106 | /* Device interface */ |
| 107 | DEVMETHOD(device_identify, bus_generic_identify), |
| 108 | DEVMETHOD(device_probe, nexus_probe), |
| 109 | DEVMETHOD(device_attach, nexus_attach), |
| 110 | DEVMETHOD(device_detach, bus_generic_detach), |
| 111 | DEVMETHOD(device_shutdown, bus_generic_shutdown), |
| 112 | DEVMETHOD(device_suspend, bus_generic_suspend), |
| 113 | DEVMETHOD(device_resume, bus_generic_resume), |
| 114 | |
| 115 | /* Bus interface */ |
| 116 | DEVMETHOD(bus_print_child, nexus_print_child), |
| 117 | DEVMETHOD(bus_add_child, nexus_add_child), |
| 118 | DEVMETHOD(bus_read_ivar, nexus_read_ivar), |
| 119 | DEVMETHOD(bus_write_ivar, nexus_write_ivar), |
| 120 | DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), |
| 121 | DEVMETHOD(bus_release_resource, nexus_release_resource), |
| 122 | DEVMETHOD(bus_activate_resource, nexus_activate_resource), |
| 123 | DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), |
| 124 | DEVMETHOD(bus_setup_intr, nexus_setup_intr), |
| 125 | DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), |
| 126 | DEVMETHOD(bus_set_resource, nexus_set_resource), |
| 127 | DEVMETHOD(bus_get_resource, nexus_get_resource), |
| 128 | DEVMETHOD(bus_delete_resource, nexus_delete_resource), |
| 129 | |
| 130 | { 0, 0 } |
| 131 | }; |
| 132 | |
| 133 | static driver_t nexus_driver = { |
| 134 | "nexus", |
| 135 | nexus_methods, |
| 136 | 1, /* no softc */ |
| 137 | }; |
| 138 | static devclass_t nexus_devclass; |
| 139 | |
| 140 | DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); |
| 141 | |
| 142 | static int |
| 143 | nexus_probe(device_t dev) |
| 144 | { |
| 145 | device_quiet(dev); /* suppress attach message for neatness */ |
| 146 | |
| 147 | /* |
| 148 | * IRQ's are on the mainboard on old systems, but on the ISA part |
| 149 | * of PCI->ISA bridges. There would be multiple sets of IRQs on |
| 150 | * multi-ISA-bus systems. PCI interrupts are routed to the ISA |
| 151 | * component, so in a way, PCI can be a partial child of an ISA bus(!). |
| 152 | * APIC interrupts are global though. |
| 153 | * In the non-APIC case, disallow the use of IRQ 2. |
| 154 | */ |
| 155 | irq_rman.rm_start = 0; |
| 156 | irq_rman.rm_type = RMAN_ARRAY; |
| 157 | irq_rman.rm_descr = "Interrupt request lines"; |
| 158 | #ifdef APIC_IO |
| 159 | irq_rman.rm_end = APIC_INTMAPSIZE - 1; |
| 160 | if (rman_init(&irq_rman) |
| 161 | || rman_manage_region(&irq_rman, |
| 162 | irq_rman.rm_start, irq_rman.rm_end)) |
| 163 | panic("nexus_probe irq_rman"); |
| 164 | #else |
| 165 | irq_rman.rm_end = 15; |
| 166 | if (rman_init(&irq_rman) |
| 167 | || rman_manage_region(&irq_rman, irq_rman.rm_start, 1) |
| 168 | || rman_manage_region(&irq_rman, 3, irq_rman.rm_end)) |
| 169 | panic("nexus_probe irq_rman"); |
| 170 | #endif |
| 171 | |
| 172 | /* |
| 173 | * ISA DMA on PCI systems is implemented in the ISA part of each |
| 174 | * PCI->ISA bridge and the channels can be duplicated if there are |
| 175 | * multiple bridges. (eg: laptops with docking stations) |
| 176 | */ |
| 177 | drq_rman.rm_start = 0; |
| 178 | drq_rman.rm_end = 7; |
| 179 | drq_rman.rm_type = RMAN_ARRAY; |
| 180 | drq_rman.rm_descr = "DMA request lines"; |
| 181 | /* XXX drq 0 not available on some machines */ |
| 182 | if (rman_init(&drq_rman) |
| 183 | || rman_manage_region(&drq_rman, |
| 184 | drq_rman.rm_start, drq_rman.rm_end)) |
| 185 | panic("nexus_probe drq_rman"); |
| 186 | |
| 187 | /* |
| 188 | * However, IO ports and Memory truely are global at this level, |
| 189 | * as are APIC interrupts (however many IO APICS there turn out |
| 190 | * to be on large systems..) |
| 191 | */ |
| 192 | port_rman.rm_start = 0; |
| 193 | port_rman.rm_end = 0xffff; |
| 194 | port_rman.rm_type = RMAN_ARRAY; |
| 195 | port_rman.rm_descr = "I/O ports"; |
| 196 | if (rman_init(&port_rman) |
| 197 | || rman_manage_region(&port_rman, 0, 0xffff)) |
| 198 | panic("nexus_probe port_rman"); |
| 199 | |
| 200 | mem_rman.rm_start = 0; |
| 201 | mem_rman.rm_end = ~0u; |
| 202 | mem_rman.rm_type = RMAN_ARRAY; |
| 203 | mem_rman.rm_descr = "I/O memory addresses"; |
| 204 | if (rman_init(&mem_rman) |
| 205 | || rman_manage_region(&mem_rman, 0, ~0)) |
| 206 | panic("nexus_probe mem_rman"); |
| 207 | |
| 208 | return bus_generic_probe(dev); |
| 209 | } |
| 210 | |
| 211 | static int |
| 212 | nexus_attach(device_t dev) |
| 213 | { |
| 214 | device_t child; |
| 215 | |
| 216 | /* |
| 217 | * First, let our child driver's identify any child devices that |
| 218 | * they can find. Once that is done attach any devices that we |
| 219 | * found. |
| 220 | */ |
| 221 | #if 0 /* FUTURE */ |
| 222 | bus_generic_probe(dev); |
| 223 | #endif |
| 224 | bus_generic_attach(dev); |
| 225 | |
| 226 | /* |
| 227 | * And if we didn't see EISA or ISA on a pci bridge, create some |
| 228 | * connection points now so they show up "on motherboard". |
| 229 | */ |
| 230 | if (!devclass_get_device(devclass_find("eisa"), 0)) { |
| 231 | child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0); |
| 232 | if (child == NULL) |
| 233 | panic("nexus_attach eisa"); |
| 234 | device_probe_and_attach(child); |
| 235 | } |
| 236 | if (!devclass_get_device(devclass_find("isa"), 0)) { |
| 237 | child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0); |
| 238 | if (child == NULL) |
| 239 | panic("nexus_attach isa"); |
| 240 | device_probe_and_attach(child); |
| 241 | } |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static int |
| 247 | nexus_print_all_resources(device_t dev) |
| 248 | { |
| 249 | struct nexus_device *ndev = DEVTONX(dev); |
| 250 | struct resource_list *rl = &ndev->nx_resources; |
| 251 | int retval = 0; |
| 252 | |
| 253 | if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1) |
| 254 | retval += kprintf(" at"); |
| 255 | |
| 256 | retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); |
| 257 | retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); |
| 258 | retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); |
| 259 | |
| 260 | return retval; |
| 261 | } |
| 262 | |
| 263 | static int |
| 264 | nexus_print_child(device_t bus, device_t child) |
| 265 | { |
| 266 | struct nexus_device *ndev = DEVTONX(child); |
| 267 | int retval = 0; |
| 268 | |
| 269 | retval += bus_print_child_header(bus, child); |
| 270 | retval += nexus_print_all_resources(child); |
| 271 | if (ndev->nx_pcibus != -1) |
| 272 | retval += kprintf(" pcibus %d", ndev->nx_pcibus); |
| 273 | retval += kprintf(" on motherboard\n"); |
| 274 | |
| 275 | return (retval); |
| 276 | } |
| 277 | |
| 278 | static device_t |
| 279 | nexus_add_child(device_t bus, device_t parent, int order, |
| 280 | const char *name, int unit) |
| 281 | { |
| 282 | device_t child; |
| 283 | struct nexus_device *ndev; |
| 284 | |
| 285 | ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO); |
| 286 | if (!ndev) |
| 287 | return(0); |
| 288 | resource_list_init(&ndev->nx_resources); |
| 289 | ndev->nx_pcibus = -1; |
| 290 | |
| 291 | child = device_add_child_ordered(parent, order, name, unit); |
| 292 | |
| 293 | /* should we free this in nexus_child_detached? */ |
| 294 | device_set_ivars(child, ndev); |
| 295 | |
| 296 | return(child); |
| 297 | } |
| 298 | |
| 299 | static int |
| 300 | nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) |
| 301 | { |
| 302 | struct nexus_device *ndev = DEVTONX(child); |
| 303 | |
| 304 | switch (which) { |
| 305 | case NEXUS_IVAR_PCIBUS: |
| 306 | *result = ndev->nx_pcibus; |
| 307 | break; |
| 308 | default: |
| 309 | return ENOENT; |
| 310 | } |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | static int |
| 315 | nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) |
| 316 | { |
| 317 | struct nexus_device *ndev = DEVTONX(child); |
| 318 | |
| 319 | switch (which) { |
| 320 | case NEXUS_IVAR_PCIBUS: |
| 321 | ndev->nx_pcibus = value; |
| 322 | break; |
| 323 | default: |
| 324 | return ENOENT; |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * Allocate a resource on behalf of child. NB: child is usually going to be a |
| 331 | * child of one of our descendants, not a direct child of nexus0. |
| 332 | * (Exceptions include npx.) |
| 333 | */ |
| 334 | static struct resource * |
| 335 | nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, |
| 336 | u_long start, u_long end, u_long count, u_int flags) |
| 337 | { |
| 338 | struct nexus_device *ndev = DEVTONX(child); |
| 339 | struct resource *rv; |
| 340 | struct resource_list_entry *rle; |
| 341 | struct rman *rm; |
| 342 | int needactivate = flags & RF_ACTIVE; |
| 343 | |
| 344 | /* |
| 345 | * If this is an allocation of the "default" range for a given RID, and |
| 346 | * we know what the resources for this device are (ie. they aren't maintained |
| 347 | * by a child bus), then work out the start/end values. |
| 348 | */ |
| 349 | if ((start == 0UL) && (end == ~0UL) && (count == 1)) { |
| 350 | if (ndev == NULL) |
| 351 | return(NULL); |
| 352 | rle = resource_list_find(&ndev->nx_resources, type, *rid); |
| 353 | if (rle == NULL) |
| 354 | return(NULL); |
| 355 | start = rle->start; |
| 356 | end = rle->end; |
| 357 | count = rle->count; |
| 358 | } |
| 359 | |
| 360 | flags &= ~RF_ACTIVE; |
| 361 | |
| 362 | switch (type) { |
| 363 | case SYS_RES_IRQ: |
| 364 | rm = &irq_rman; |
| 365 | break; |
| 366 | |
| 367 | case SYS_RES_DRQ: |
| 368 | rm = &drq_rman; |
| 369 | break; |
| 370 | |
| 371 | case SYS_RES_IOPORT: |
| 372 | rm = &port_rman; |
| 373 | break; |
| 374 | |
| 375 | case SYS_RES_MEMORY: |
| 376 | rm = &mem_rman; |
| 377 | break; |
| 378 | |
| 379 | default: |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | rv = rman_reserve_resource(rm, start, end, count, flags, child); |
| 384 | if (rv == 0) |
| 385 | return 0; |
| 386 | |
| 387 | if (type == SYS_RES_MEMORY) { |
| 388 | rman_set_bustag(rv, I386_BUS_SPACE_MEM); |
| 389 | } else if (type == SYS_RES_IOPORT) { |
| 390 | rman_set_bustag(rv, I386_BUS_SPACE_IO); |
| 391 | rman_set_bushandle(rv, rv->r_start); |
| 392 | } |
| 393 | |
| 394 | if (needactivate) { |
| 395 | if (bus_activate_resource(child, type, *rid, rv)) { |
| 396 | rman_release_resource(rv); |
| 397 | return 0; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | return rv; |
| 402 | } |
| 403 | |
| 404 | static int |
| 405 | nexus_activate_resource(device_t bus, device_t child, int type, int rid, |
| 406 | struct resource *r) |
| 407 | { |
| 408 | /* |
| 409 | * If this is a memory resource, map it into the kernel. |
| 410 | */ |
| 411 | if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) { |
| 412 | caddr_t vaddr = 0; |
| 413 | |
| 414 | if (rman_get_end(r) < 1024 * 1024) { |
| 415 | /* |
| 416 | * The first 1Mb is mapped at KERNBASE. |
| 417 | */ |
| 418 | vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r)); |
| 419 | } else { |
| 420 | u_int64_t paddr; |
| 421 | u_int64_t psize; |
| 422 | u_int32_t poffs; |
| 423 | |
| 424 | paddr = rman_get_start(r); |
| 425 | psize = rman_get_size(r); |
| 426 | |
| 427 | poffs = paddr - trunc_page(paddr); |
| 428 | vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs; |
| 429 | } |
| 430 | rman_set_virtual(r, vaddr); |
| 431 | /* IBM-PC: the type of bus_space_handle_t is u_int */ |
| 432 | rman_set_bushandle(r, (bus_space_handle_t) vaddr); |
| 433 | } |
| 434 | return (rman_activate_resource(r)); |
| 435 | } |
| 436 | |
| 437 | static int |
| 438 | nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, |
| 439 | struct resource *r) |
| 440 | { |
| 441 | /* |
| 442 | * If this is a memory resource, unmap it. |
| 443 | */ |
| 444 | if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) && |
| 445 | (rman_get_end(r) >= 1024 * 1024)) { |
| 446 | u_int32_t psize; |
| 447 | |
| 448 | psize = rman_get_size(r); |
| 449 | pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); |
| 450 | } |
| 451 | |
| 452 | return (rman_deactivate_resource(r)); |
| 453 | } |
| 454 | |
| 455 | static int |
| 456 | nexus_release_resource(device_t bus, device_t child, int type, int rid, |
| 457 | struct resource *r) |
| 458 | { |
| 459 | if (rman_get_flags(r) & RF_ACTIVE) { |
| 460 | int error = bus_deactivate_resource(child, type, rid, r); |
| 461 | if (error) |
| 462 | return error; |
| 463 | } |
| 464 | return (rman_release_resource(r)); |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * Currently this uses the really grody interface from kern/kern_intr.c |
| 469 | * (which really doesn't belong in kern/anything.c). Eventually, all of |
| 470 | * the code in kern_intr.c and machdep_intr.c should get moved here, since |
| 471 | * this is going to be the official interface. |
| 472 | */ |
| 473 | static int |
| 474 | nexus_setup_intr(device_t bus, device_t child, struct resource *irq, |
| 475 | int flags, void (*ihand)(void *), void *arg, |
| 476 | void **cookiep, lwkt_serialize_t serializer) |
| 477 | { |
| 478 | driver_t *driver; |
| 479 | int error, icflags; |
| 480 | |
| 481 | /* somebody tried to setup an irq that failed to allocate! */ |
| 482 | if (irq == NULL) |
| 483 | panic("nexus_setup_intr: NULL irq resource!"); |
| 484 | |
| 485 | *cookiep = 0; |
| 486 | icflags = flags; |
| 487 | if ((irq->r_flags & RF_SHAREABLE) == 0) |
| 488 | icflags |= INTR_EXCL; |
| 489 | |
| 490 | driver = device_get_driver(child); |
| 491 | |
| 492 | /* |
| 493 | * We depend here on rman_activate_resource() being idempotent. |
| 494 | */ |
| 495 | error = rman_activate_resource(irq); |
| 496 | if (error) |
| 497 | return (error); |
| 498 | |
| 499 | /* |
| 500 | * XXX cast the interrupt handler function to an inthand2_t. The |
| 501 | * difference is that an additional frame argument is passed which |
| 502 | * we do not currently want to expose the BUS subsystem to. |
| 503 | */ |
| 504 | *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg, |
| 505 | device_get_nameunit(child), serializer, |
| 506 | icflags); |
| 507 | if (*cookiep == NULL) |
| 508 | error = EINVAL; |
| 509 | return (error); |
| 510 | } |
| 511 | |
| 512 | static int |
| 513 | nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) |
| 514 | { |
| 515 | if (ih) { |
| 516 | unregister_int(ih); |
| 517 | return (0); |
| 518 | } |
| 519 | return(-1); |
| 520 | } |
| 521 | |
| 522 | static int |
| 523 | nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) |
| 524 | { |
| 525 | struct nexus_device *ndev = DEVTONX(child); |
| 526 | struct resource_list *rl = &ndev->nx_resources; |
| 527 | |
| 528 | /* XXX this should return a success/failure indicator */ |
| 529 | resource_list_add(rl, type, rid, start, start + count - 1, count); |
| 530 | return(0); |
| 531 | } |
| 532 | |
| 533 | static int |
| 534 | nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) |
| 535 | { |
| 536 | struct nexus_device *ndev = DEVTONX(child); |
| 537 | struct resource_list *rl = &ndev->nx_resources; |
| 538 | struct resource_list_entry *rle; |
| 539 | |
| 540 | rle = resource_list_find(rl, type, rid); |
| 541 | device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", |
| 542 | type, rid, startp, countp, rle); |
| 543 | if (!rle) |
| 544 | return(ENOENT); |
| 545 | if (startp) |
| 546 | *startp = rle->start; |
| 547 | if (countp) |
| 548 | *countp = rle->count; |
| 549 | return(0); |
| 550 | } |
| 551 | |
| 552 | static void |
| 553 | nexus_delete_resource(device_t dev, device_t child, int type, int rid) |
| 554 | { |
| 555 | struct nexus_device *ndev = DEVTONX(child); |
| 556 | struct resource_list *rl = &ndev->nx_resources; |
| 557 | |
| 558 | resource_list_delete(rl, type, rid); |
| 559 | } |
| 560 | |
| 561 | /* |
| 562 | * Temporary Debugging |
| 563 | */ |
| 564 | |
| 565 | static void PCHAR_(int, void * __unused); |
| 566 | |
| 567 | int |
| 568 | kprintf0(const char *fmt, ...) |
| 569 | { |
| 570 | return 0; |
| 571 | __va_list ap; |
| 572 | int retval; |
| 573 | |
| 574 | __va_start(ap, fmt); |
| 575 | retval = kvcprintf(fmt, PCHAR_, NULL, 10, ap); |
| 576 | __va_end(ap); |
| 577 | return (retval); |
| 578 | } |
| 579 | |
| 580 | static void |
| 581 | PCHAR_(int c, void *dummy __unused) |
| 582 | { |
| 583 | const int COMC_TXWAIT = 0x40000; |
| 584 | const int COMPORT = 0x3f8; |
| 585 | const int LSR_TXRDY = 0x20; |
| 586 | const int com_lsr = 5; |
| 587 | const int com_data = 0; |
| 588 | int wait; |
| 589 | |
| 590 | for (wait = COMC_TXWAIT; wait > 0; wait--) { |
| 591 | if (inb(COMPORT + com_lsr) & LSR_TXRDY) { |
| 592 | outb(COMPORT + com_data, (u_char)c); |
| 593 | break; |
| 594 | } |
| 595 | } |
| 596 | } |
| 597 | |