1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 /* 32 * This code implements a `root nexus' for Intel Architecture 33 * machines. The function of the root nexus is to serve as an 34 * attachment point for both processors and buses, and to manage 35 * resources which are common to all of them. In particular, 36 * this code implements the core resource managers for interrupt 37 * requests, DMA requests (which rightfully should be a part of the 38 * ISA code but it's easier to do it here for now), I/O port addresses, 39 * and I/O memory address space. 40 */ 41 42 #ifdef __amd64__ 43 #define DEV_APIC 44 #else 45 #include "opt_apic.h" 46 #endif 47 #include "opt_isa.h" 48 #include "opt_pci.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/bus.h> 53 #include <sys/interrupt.h> 54 #include <sys/kernel.h> 55 #include <sys/linker.h> 56 #include <sys/malloc.h> 57 #include <sys/module.h> 58 #include <sys/rman.h> 59 60 #include <vm/vm.h> 61 #include <vm/vm_param.h> 62 #include <vm/vm_page.h> 63 #include <vm/vm_phys.h> 64 #include <vm/vm_dumpset.h> 65 #include <vm/pmap.h> 66 67 #include <machine/bus.h> 68 #include <machine/intr_machdep.h> 69 #include <machine/md_var.h> 70 #include <machine/metadata.h> 71 #include <machine/nexusvar.h> 72 #include <machine/pc/bios.h> 73 #include <machine/resource.h> 74 75 #ifdef DEV_APIC 76 #include "pcib_if.h" 77 #endif 78 79 #ifdef DEV_ISA 80 #include <isa/isavar.h> 81 #include <isa/isareg.h> 82 #endif 83 84 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel") 85 86 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 87 88 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 89 90 struct rman irq_rman, drq_rman, port_rman, mem_rman; 91 92 static int nexus_print_all_resources(device_t dev); 93 94 static device_probe_t nexus_probe; 95 static device_attach_t nexus_attach; 96 97 static bus_add_child_t nexus_add_child; 98 static bus_print_child_t nexus_print_child; 99 100 static bus_alloc_resource_t nexus_alloc_resource; 101 static bus_get_resource_list_t nexus_get_reslist; 102 static bus_get_rman_t nexus_get_rman; 103 static bus_map_resource_t nexus_map_resource; 104 static bus_unmap_resource_t nexus_unmap_resource; 105 106 #ifdef SMP 107 static bus_bind_intr_t nexus_bind_intr; 108 #endif 109 static bus_config_intr_t nexus_config_intr; 110 static bus_describe_intr_t nexus_describe_intr; 111 static bus_resume_intr_t nexus_resume_intr; 112 static bus_setup_intr_t nexus_setup_intr; 113 static bus_suspend_intr_t nexus_suspend_intr; 114 static bus_teardown_intr_t nexus_teardown_intr; 115 116 static bus_get_cpus_t nexus_get_cpus; 117 118 #if defined(DEV_APIC) && defined(DEV_PCI) 119 static pcib_alloc_msi_t nexus_alloc_msi; 120 static pcib_release_msi_t nexus_release_msi; 121 static pcib_alloc_msix_t nexus_alloc_msix; 122 static pcib_release_msix_t nexus_release_msix; 123 static pcib_map_msi_t nexus_map_msi; 124 #endif 125 126 static device_method_t nexus_methods[] = { 127 /* Device interface */ 128 DEVMETHOD(device_probe, nexus_probe), 129 DEVMETHOD(device_attach, nexus_attach), 130 DEVMETHOD(device_detach, bus_generic_detach), 131 DEVMETHOD(device_shutdown, bus_generic_shutdown), 132 DEVMETHOD(device_suspend, bus_generic_suspend), 133 DEVMETHOD(device_resume, bus_generic_resume), 134 135 /* Bus interface */ 136 DEVMETHOD(bus_print_child, nexus_print_child), 137 DEVMETHOD(bus_add_child, nexus_add_child), 138 DEVMETHOD(bus_activate_resource, bus_generic_rman_activate_resource), 139 DEVMETHOD(bus_adjust_resource, bus_generic_rman_adjust_resource), 140 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 141 DEVMETHOD(bus_deactivate_resource, bus_generic_rman_deactivate_resource), 142 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 143 DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 144 DEVMETHOD(bus_get_rman, nexus_get_rman), 145 DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource), 146 DEVMETHOD(bus_map_resource, nexus_map_resource), 147 DEVMETHOD(bus_release_resource, bus_generic_rman_release_resource), 148 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 149 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource), 150 #ifdef SMP 151 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 152 #endif 153 DEVMETHOD(bus_config_intr, nexus_config_intr), 154 DEVMETHOD(bus_describe_intr, nexus_describe_intr), 155 DEVMETHOD(bus_resume_intr, nexus_resume_intr), 156 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 157 DEVMETHOD(bus_suspend_intr, nexus_suspend_intr), 158 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 159 DEVMETHOD(bus_get_cpus, nexus_get_cpus), 160 161 /* pcib interface */ 162 #if defined(DEV_APIC) && defined(DEV_PCI) 163 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi), 164 DEVMETHOD(pcib_release_msi, nexus_release_msi), 165 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix), 166 DEVMETHOD(pcib_release_msix, nexus_release_msix), 167 DEVMETHOD(pcib_map_msi, nexus_map_msi), 168 #endif 169 DEVMETHOD_END 170 }; 171 172 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 173 174 DRIVER_MODULE(nexus, root, nexus_driver, 0, 0); 175 176 static int 177 nexus_probe(device_t dev) 178 { 179 180 device_quiet(dev); /* suppress attach message for neatness */ 181 return (BUS_PROBE_GENERIC); 182 } 183 184 void 185 nexus_init_resources(void) 186 { 187 int irq; 188 189 /* 190 * XXX working notes: 191 * 192 * - IRQ resource creation should be moved to the PIC/APIC driver. 193 * - DRQ resource creation should be moved to the DMAC driver. 194 * - The above should be sorted to probe earlier than any child buses. 195 * 196 * - Leave I/O and memory creation here, as child probes may need them. 197 * (especially eg. ACPI) 198 */ 199 200 /* 201 * IRQ's are on the mainboard on old systems, but on the ISA part 202 * of PCI->ISA bridges. There would be multiple sets of IRQs on 203 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 204 * component, so in a way, PCI can be a partial child of an ISA bus(!). 205 * APIC interrupts are global though. 206 */ 207 irq_rman.rm_start = 0; 208 irq_rman.rm_type = RMAN_ARRAY; 209 irq_rman.rm_descr = "Interrupt request lines"; 210 irq_rman.rm_end = num_io_irqs - 1; 211 if (rman_init(&irq_rman)) 212 panic("nexus_init_resources irq_rman"); 213 214 /* 215 * We search for regions of existing IRQs and add those to the IRQ 216 * resource manager. 217 */ 218 for (irq = 0; irq < num_io_irqs; irq++) 219 if (intr_lookup_source(irq) != NULL) 220 if (rman_manage_region(&irq_rman, irq, irq) != 0) 221 panic("nexus_init_resources irq_rman add"); 222 223 /* 224 * ISA DMA on PCI systems is implemented in the ISA part of each 225 * PCI->ISA bridge and the channels can be duplicated if there are 226 * multiple bridges. (eg: laptops with docking stations) 227 */ 228 drq_rman.rm_start = 0; 229 drq_rman.rm_end = 7; 230 drq_rman.rm_type = RMAN_ARRAY; 231 drq_rman.rm_descr = "DMA request lines"; 232 /* XXX drq 0 not available on some machines */ 233 if (rman_init(&drq_rman) 234 || rman_manage_region(&drq_rman, 235 drq_rman.rm_start, drq_rman.rm_end)) 236 panic("nexus_init_resources drq_rman"); 237 238 /* 239 * However, IO ports and Memory truely are global at this level, 240 * as are APIC interrupts (however many IO APICS there turn out 241 * to be on large systems..) 242 */ 243 port_rman.rm_start = 0; 244 port_rman.rm_end = 0xffff; 245 port_rman.rm_type = RMAN_ARRAY; 246 port_rman.rm_descr = "I/O ports"; 247 if (rman_init(&port_rman) 248 || rman_manage_region(&port_rman, 0, 0xffff)) 249 panic("nexus_init_resources port_rman"); 250 251 mem_rman.rm_start = 0; 252 mem_rman.rm_end = cpu_getmaxphyaddr(); 253 mem_rman.rm_type = RMAN_ARRAY; 254 mem_rman.rm_descr = "I/O memory addresses"; 255 if (rman_init(&mem_rman) 256 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end)) 257 panic("nexus_init_resources mem_rman"); 258 } 259 260 static int 261 nexus_attach(device_t dev) 262 { 263 264 nexus_init_resources(); 265 bus_generic_probe(dev); 266 267 /* 268 * Explicitly add the legacy0 device here. Other platform 269 * types (such as ACPI), use their own nexus(4) subclass 270 * driver to override this routine and add their own root bus. 271 */ 272 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL) 273 panic("legacy: could not attach"); 274 bus_generic_attach(dev); 275 return (0); 276 } 277 278 static int 279 nexus_print_all_resources(device_t dev) 280 { 281 struct nexus_device *ndev = DEVTONX(dev); 282 struct resource_list *rl = &ndev->nx_resources; 283 int retval = 0; 284 285 if (STAILQ_FIRST(rl)) 286 retval += printf(" at"); 287 288 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 289 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 290 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 291 292 return (retval); 293 } 294 295 static int 296 nexus_print_child(device_t bus, device_t child) 297 { 298 int retval = 0; 299 300 retval += bus_print_child_header(bus, child); 301 retval += nexus_print_all_resources(child); 302 if (device_get_flags(child)) 303 retval += printf(" flags %#x", device_get_flags(child)); 304 retval += printf("\n"); 305 306 return (retval); 307 } 308 309 static device_t 310 nexus_add_child(device_t bus, u_int order, const char *name, int unit) 311 { 312 device_t child; 313 struct nexus_device *ndev; 314 315 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 316 if (!ndev) 317 return (0); 318 resource_list_init(&ndev->nx_resources); 319 320 child = device_add_child_ordered(bus, order, name, unit); 321 322 /* should we free this in nexus_child_detached? */ 323 device_set_ivars(child, ndev); 324 325 return (child); 326 } 327 328 static struct rman * 329 nexus_get_rman(device_t bus, int type, u_int flags) 330 { 331 switch (type) { 332 case SYS_RES_IRQ: 333 return (&irq_rman); 334 case SYS_RES_DRQ: 335 return (&drq_rman); 336 case SYS_RES_IOPORT: 337 return (&port_rman); 338 case SYS_RES_MEMORY: 339 return (&mem_rman); 340 default: 341 return (NULL); 342 } 343 } 344 345 /* 346 * Allocate a resource on behalf of child. NB: child is usually going to be a 347 * child of one of our descendants, not a direct child of nexus0. 348 */ 349 static struct resource * 350 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 351 rman_res_t start, rman_res_t end, rman_res_t count, 352 u_int flags) 353 { 354 struct nexus_device *ndev = DEVTONX(child); 355 struct resource_list_entry *rle; 356 357 /* 358 * If this is an allocation of the "default" range for a given 359 * RID, and we know what the resources for this device are 360 * (ie. they aren't maintained by a child bus), then work out 361 * the start/end values. 362 */ 363 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { 364 if (device_get_parent(child) != bus || ndev == NULL) 365 return (NULL); 366 rle = resource_list_find(&ndev->nx_resources, type, *rid); 367 if (rle == NULL) 368 return (NULL); 369 start = rle->start; 370 end = rle->end; 371 count = rle->count; 372 } 373 374 return (bus_generic_rman_alloc_resource(bus, child, type, rid, 375 start, end, count, flags)); 376 } 377 378 static int 379 nexus_map_resource(device_t bus, device_t child, struct resource *r, 380 struct resource_map_request *argsp, struct resource_map *map) 381 { 382 struct resource_map_request args; 383 rman_res_t length, start; 384 int error, type; 385 386 /* Resources must be active to be mapped. */ 387 if (!(rman_get_flags(r) & RF_ACTIVE)) 388 return (ENXIO); 389 390 /* Mappings are only supported on I/O and memory resources. */ 391 type = rman_get_type(r); 392 switch (type) { 393 case SYS_RES_IOPORT: 394 case SYS_RES_MEMORY: 395 break; 396 default: 397 return (EINVAL); 398 } 399 400 resource_init_map_request(&args); 401 error = resource_validate_map_request(r, argsp, &args, &start, &length); 402 if (error) 403 return (error); 404 405 /* 406 * If this is a memory resource, map it into the kernel. 407 */ 408 switch (type) { 409 case SYS_RES_IOPORT: 410 map->r_bushandle = start; 411 map->r_bustag = X86_BUS_SPACE_IO; 412 map->r_size = length; 413 map->r_vaddr = NULL; 414 break; 415 case SYS_RES_MEMORY: 416 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr); 417 map->r_bustag = X86_BUS_SPACE_MEM; 418 map->r_size = length; 419 420 /* 421 * The handle is the virtual address. 422 */ 423 map->r_bushandle = (bus_space_handle_t)map->r_vaddr; 424 break; 425 } 426 return (0); 427 } 428 429 static int 430 nexus_unmap_resource(device_t bus, device_t child, struct resource *r, 431 struct resource_map *map) 432 { 433 434 /* 435 * If this is a memory resource, unmap it. 436 */ 437 switch (rman_get_type(r)) { 438 case SYS_RES_MEMORY: 439 pmap_unmapdev(map->r_vaddr, map->r_size); 440 /* FALLTHROUGH */ 441 case SYS_RES_IOPORT: 442 break; 443 default: 444 return (EINVAL); 445 } 446 return (0); 447 } 448 449 /* 450 * Currently this uses the really grody interface from kern/kern_intr.c 451 * (which really doesn't belong in kern/anything.c). Eventually, all of 452 * the code in kern_intr.c and machdep_intr.c should get moved here, since 453 * this is going to be the official interface. 454 */ 455 static int 456 nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 457 int flags, driver_filter_t filter, void (*ihand)(void *), 458 void *arg, void **cookiep) 459 { 460 int error, domain; 461 462 /* somebody tried to setup an irq that failed to allocate! */ 463 if (irq == NULL) 464 panic("nexus_setup_intr: NULL irq resource!"); 465 466 *cookiep = NULL; 467 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 468 flags |= INTR_EXCL; 469 470 /* 471 * We depend here on rman_activate_resource() being idempotent. 472 */ 473 error = rman_activate_resource(irq); 474 if (error != 0) 475 return (error); 476 if (bus_get_domain(child, &domain) != 0) 477 domain = 0; 478 479 error = intr_add_handler(device_get_nameunit(child), 480 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain); 481 if (error == 0) 482 rman_set_irq_cookie(irq, *cookiep); 483 484 return (error); 485 } 486 487 static int 488 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 489 { 490 int error; 491 492 error = intr_remove_handler(ih); 493 if (error == 0) 494 rman_set_irq_cookie(r, NULL); 495 return (error); 496 } 497 498 static int 499 nexus_suspend_intr(device_t dev, device_t child, struct resource *irq) 500 { 501 return (intr_event_suspend_handler(rman_get_irq_cookie(irq))); 502 } 503 504 static int 505 nexus_resume_intr(device_t dev, device_t child, struct resource *irq) 506 { 507 return (intr_event_resume_handler(rman_get_irq_cookie(irq))); 508 } 509 510 #ifdef SMP 511 static int 512 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 513 { 514 struct intsrc *isrc; 515 516 isrc = intr_lookup_source(rman_get_start(irq)); 517 if (isrc == NULL) 518 return (EINVAL); 519 return (intr_event_bind(isrc->is_event, cpu)); 520 } 521 #endif 522 523 static int 524 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 525 enum intr_polarity pol) 526 { 527 return (intr_config_intr(irq, trig, pol)); 528 } 529 530 static int 531 nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 532 void *cookie, const char *descr) 533 { 534 535 return (intr_describe(rman_get_start(irq), cookie, descr)); 536 } 537 538 static struct resource_list * 539 nexus_get_reslist(device_t dev, device_t child) 540 { 541 struct nexus_device *ndev = DEVTONX(child); 542 543 return (&ndev->nx_resources); 544 } 545 546 static int 547 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 548 cpuset_t *cpuset) 549 { 550 551 switch (op) { 552 #ifdef SMP 553 case INTR_CPUS: 554 if (setsize != sizeof(cpuset_t)) 555 return (EINVAL); 556 *cpuset = intr_cpus; 557 return (0); 558 #endif 559 default: 560 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 561 } 562 } 563 564 /* Called from the MSI code to add new IRQs to the IRQ rman. */ 565 void 566 nexus_add_irq(u_long irq) 567 { 568 569 if (rman_manage_region(&irq_rman, irq, irq) != 0) 570 panic("%s: failed", __func__); 571 } 572 573 #if defined(DEV_APIC) && defined(DEV_PCI) 574 static int 575 nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 576 { 577 578 return (msix_alloc(dev, irq)); 579 } 580 581 static int 582 nexus_release_msix(device_t pcib, device_t dev, int irq) 583 { 584 585 return (msix_release(irq)); 586 } 587 588 static int 589 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 590 { 591 592 return (msi_alloc(dev, count, maxcount, irqs)); 593 } 594 595 static int 596 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 597 { 598 599 return (msi_release(irqs, count)); 600 } 601 602 static int 603 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 604 { 605 606 return (msi_map(irq, addr, data)); 607 } 608 #endif /* DEV_APIC && DEV_PCI */ 609 610 /* Placeholder for system RAM. */ 611 static void 612 ram_identify(driver_t *driver, device_t parent) 613 { 614 615 if (resource_disabled("ram", 0)) 616 return; 617 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 618 panic("ram_identify"); 619 } 620 621 static int 622 ram_probe(device_t dev) 623 { 624 625 device_quiet(dev); 626 device_set_desc(dev, "System RAM"); 627 return (0); 628 } 629 630 static int 631 ram_attach(device_t dev) 632 { 633 struct bios_smap *smapbase, *smap, *smapend; 634 struct resource *res; 635 rman_res_t length; 636 vm_paddr_t *p; 637 caddr_t kmdp; 638 uint32_t smapsize; 639 int error, rid; 640 641 /* Retrieve the system memory map from the loader. */ 642 kmdp = preload_search_by_type("elf kernel"); 643 if (kmdp == NULL) 644 kmdp = preload_search_by_type(ELF_KERN_STR); 645 smapbase = (struct bios_smap *)preload_search_info(kmdp, 646 MODINFO_METADATA | MODINFOMD_SMAP); 647 if (smapbase != NULL) { 648 smapsize = *((u_int32_t *)smapbase - 1); 649 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 650 651 rid = 0; 652 for (smap = smapbase; smap < smapend; smap++) { 653 if (smap->type != SMAP_TYPE_MEMORY || 654 smap->length == 0) 655 continue; 656 if (smap->base > mem_rman.rm_end) 657 continue; 658 length = smap->base + smap->length > mem_rman.rm_end ? 659 mem_rman.rm_end - smap->base : smap->length; 660 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 661 smap->base, length); 662 if (error) 663 panic( 664 "ram_attach: resource %d failed set with %d", 665 rid, error); 666 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 667 0); 668 if (res == NULL) 669 panic("ram_attach: resource %d failed to attach", 670 rid); 671 rid++; 672 } 673 return (0); 674 } 675 676 /* 677 * If the system map is not available, fall back to using 678 * dump_avail[]. We use the dump_avail[] array rather than 679 * phys_avail[] for the memory map as phys_avail[] contains 680 * holes for kernel memory, page 0, the message buffer, and 681 * the dcons buffer. We test the end address in the loop 682 * instead of the start since the start address for the first 683 * segment is 0. 684 */ 685 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 686 if (p[0] > mem_rman.rm_end) 687 break; 688 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) - 689 p[0]; 690 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 691 length); 692 if (error) 693 panic("ram_attach: resource %d failed set with %d", rid, 694 error); 695 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 696 if (res == NULL) 697 panic("ram_attach: resource %d failed to attach", rid); 698 } 699 return (0); 700 } 701 702 static device_method_t ram_methods[] = { 703 /* Device interface */ 704 DEVMETHOD(device_identify, ram_identify), 705 DEVMETHOD(device_probe, ram_probe), 706 DEVMETHOD(device_attach, ram_attach), 707 708 DEVMETHOD_END 709 }; 710 711 static driver_t ram_driver = { 712 "ram", 713 ram_methods, 714 1, /* no softc */ 715 }; 716 717 DRIVER_MODULE(ram, nexus, ram_driver, 0, 0); 718 719 #ifdef DEV_ISA 720 /* 721 * Placeholder which claims PnP 'devices' which describe system 722 * resources. 723 */ 724 static struct isa_pnp_id sysresource_ids[] = { 725 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 726 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 727 { 0 } 728 }; 729 730 static int 731 sysresource_probe(device_t dev) 732 { 733 int result; 734 735 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 736 device_quiet(dev); 737 } 738 return (result); 739 } 740 741 static int 742 sysresource_attach(device_t dev) 743 { 744 return (0); 745 } 746 747 static device_method_t sysresource_methods[] = { 748 /* Device interface */ 749 DEVMETHOD(device_probe, sysresource_probe), 750 DEVMETHOD(device_attach, sysresource_attach), 751 DEVMETHOD(device_detach, bus_generic_detach), 752 DEVMETHOD(device_shutdown, bus_generic_shutdown), 753 DEVMETHOD(device_suspend, bus_generic_suspend), 754 DEVMETHOD(device_resume, bus_generic_resume), 755 756 DEVMETHOD_END 757 }; 758 759 static driver_t sysresource_driver = { 760 "sysresource", 761 sysresource_methods, 762 1, /* no softc */ 763 }; 764 765 DRIVER_MODULE(sysresource, isa, sysresource_driver, 0, 0); 766 ISA_PNP_INFO(sysresource_ids); 767 #endif /* DEV_ISA */ 768