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 86static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 87 88#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 89 90struct rman irq_rman, drq_rman, port_rman, mem_rman; 91 92static int nexus_print_all_resources(device_t dev); 93 94static device_probe_t nexus_probe; 95static device_attach_t nexus_attach; 96 97static bus_add_child_t nexus_add_child; 98static bus_print_child_t nexus_print_child; 99 100static bus_alloc_resource_t nexus_alloc_resource; 101static bus_get_resource_list_t nexus_get_reslist; 102static bus_get_rman_t nexus_get_rman; 103static bus_map_resource_t nexus_map_resource; 104static bus_unmap_resource_t nexus_unmap_resource; 105 106#ifdef SMP 107static bus_bind_intr_t nexus_bind_intr; 108#endif 109static bus_config_intr_t nexus_config_intr; 110static bus_describe_intr_t nexus_describe_intr; 111static bus_resume_intr_t nexus_resume_intr; 112static bus_setup_intr_t nexus_setup_intr; 113static bus_suspend_intr_t nexus_suspend_intr; 114static bus_teardown_intr_t nexus_teardown_intr; 115 116static bus_get_cpus_t nexus_get_cpus; 117 118#if defined(DEV_APIC) && defined(DEV_PCI) 119static pcib_alloc_msi_t nexus_alloc_msi; 120static pcib_release_msi_t nexus_release_msi; 121static pcib_alloc_msix_t nexus_alloc_msix; 122static pcib_release_msix_t nexus_release_msix; 123static pcib_map_msi_t nexus_map_msi; 124#endif 125 126static 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 172DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 173 174DRIVER_MODULE(nexus, root, nexus_driver, 0, 0); 175 176static int 177nexus_probe(device_t dev) 178{ 179 180 device_quiet(dev); /* suppress attach message for neatness */ 181 return (BUS_PROBE_GENERIC); 182} 183 184void 185nexus_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 260static int 261nexus_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 278static int 279nexus_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 295static int 296nexus_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 309static device_t 310nexus_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 328static struct rman * 329nexus_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 */ 349static struct resource * 350nexus_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 378static int 379nexus_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 429static int 430nexus_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 */ 455static int 456nexus_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 struct intsrc *isrc; 462 463 /* somebody tried to setup an irq that failed to allocate! */ 464 if (irq == NULL) 465 panic("nexus_setup_intr: NULL irq resource!"); 466 467 *cookiep = NULL; 468 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 469 flags |= INTR_EXCL; 470 471 /* 472 * We depend here on rman_activate_resource() being idempotent. 473 */ 474 error = rman_activate_resource(irq); 475 if (error != 0) 476 return (error); 477 if (bus_get_domain(child, &domain) != 0) 478 domain = 0; 479 480 isrc = intr_lookup_source(rman_get_start(irq)); 481 if (isrc == NULL) 482 return (EINVAL); 483 error = intr_add_handler(isrc, device_get_nameunit(child), 484 filter, ihand, arg, flags, cookiep, domain); 485 if (error == 0) 486 rman_set_irq_cookie(irq, *cookiep); 487 488 return (error); 489} 490 491static int 492nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 493{ 494 int error; 495 496 error = intr_remove_handler(ih); 497 if (error == 0) 498 rman_set_irq_cookie(r, NULL); 499 return (error); 500} 501 502static int 503nexus_suspend_intr(device_t dev, device_t child, struct resource *irq) 504{ 505 return (intr_event_suspend_handler(rman_get_irq_cookie(irq))); 506} 507 508static int 509nexus_resume_intr(device_t dev, device_t child, struct resource *irq) 510{ 511 return (intr_event_resume_handler(rman_get_irq_cookie(irq))); 512} 513 514#ifdef SMP 515static int 516nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 517{ 518 struct intsrc *isrc; 519 520 isrc = intr_lookup_source(rman_get_start(irq)); 521 if (isrc == NULL) 522 return (EINVAL); 523 return (intr_event_bind(isrc->is_event, cpu)); 524} 525#endif 526 527static int 528nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 529 enum intr_polarity pol) 530{ 531 struct intsrc *isrc; 532 533 isrc = intr_lookup_source(irq); 534 if (isrc == NULL) 535 return (EINVAL); 536 return (intr_config_intr(isrc, trig, pol)); 537} 538 539static int 540nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 541 void *cookie, const char *descr) 542{ 543 struct intsrc *isrc; 544 545 isrc = intr_lookup_source(rman_get_start(irq)); 546 if (isrc == NULL) 547 return (EINVAL); 548 return (intr_describe(isrc, cookie, descr)); 549} 550 551static struct resource_list * 552nexus_get_reslist(device_t dev, device_t child) 553{ 554 struct nexus_device *ndev = DEVTONX(child); 555 556 return (&ndev->nx_resources); 557} 558 559static int 560nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 561 cpuset_t *cpuset) 562{ 563 564 switch (op) { 565#ifdef SMP 566 case INTR_CPUS: 567 if (setsize != sizeof(cpuset_t)) 568 return (EINVAL); 569 *cpuset = intr_cpus; 570 return (0); 571#endif 572 default: 573 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 574 } 575} 576 577/* Called from the MSI code to add new IRQs to the IRQ rman. */ 578void 579nexus_add_irq(u_long irq) 580{ 581 582 if (rman_manage_region(&irq_rman, irq, irq) != 0) 583 panic("%s: failed", __func__); 584} 585 586#if defined(DEV_APIC) && defined(DEV_PCI) 587static int 588nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 589{ 590 591 return (msix_alloc(dev, irq)); 592} 593 594static int 595nexus_release_msix(device_t pcib, device_t dev, int irq) 596{ 597 598 return (msix_release(irq)); 599} 600 601static int 602nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 603{ 604 605 return (msi_alloc(dev, count, maxcount, irqs)); 606} 607 608static int 609nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 610{ 611 612 return (msi_release(irqs, count)); 613} 614 615static int 616nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 617{ 618 619 return (msi_map(irq, addr, data)); 620} 621#endif /* DEV_APIC && DEV_PCI */ 622 623/* Placeholder for system RAM. */ 624static void 625ram_identify(driver_t *driver, device_t parent) 626{ 627 628 if (resource_disabled("ram", 0)) 629 return; 630 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 631 panic("ram_identify"); 632} 633 634static int 635ram_probe(device_t dev) 636{ 637 638 device_quiet(dev); 639 device_set_desc(dev, "System RAM"); 640 return (0); 641} 642 643static int 644ram_attach(device_t dev) 645{ 646 struct bios_smap *smapbase, *smap, *smapend; 647 struct resource *res; 648 rman_res_t length; 649 vm_paddr_t *p; 650 caddr_t kmdp; 651 uint32_t smapsize; 652 int error, rid; 653 654 /* Retrieve the system memory map from the loader. */ 655 kmdp = preload_search_by_type("elf kernel"); 656 if (kmdp == NULL) 657 kmdp = preload_search_by_type(ELF_KERN_STR); 658 smapbase = (struct bios_smap *)preload_search_info(kmdp, 659 MODINFO_METADATA | MODINFOMD_SMAP); 660 if (smapbase != NULL) { 661 smapsize = *((u_int32_t *)smapbase - 1); 662 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 663 664 rid = 0; 665 for (smap = smapbase; smap < smapend; smap++) { 666 if (smap->type != SMAP_TYPE_MEMORY || 667 smap->length == 0) 668 continue; 669 if (smap->base > mem_rman.rm_end) 670 continue; 671 length = smap->base + smap->length > mem_rman.rm_end ? 672 mem_rman.rm_end - smap->base : smap->length; 673 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 674 smap->base, length); 675 if (error) 676 panic( 677 "ram_attach: resource %d failed set with %d", 678 rid, error); 679 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 680 0); 681 if (res == NULL) 682 panic("ram_attach: resource %d failed to attach", 683 rid); 684 rid++; 685 } 686 return (0); 687 } 688 689 /* 690 * If the system map is not available, fall back to using 691 * dump_avail[]. We use the dump_avail[] array rather than 692 * phys_avail[] for the memory map as phys_avail[] contains 693 * holes for kernel memory, page 0, the message buffer, and 694 * the dcons buffer. We test the end address in the loop 695 * instead of the start since the start address for the first 696 * segment is 0. 697 */ 698 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 699 if (p[0] > mem_rman.rm_end) 700 break; 701 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) - 702 p[0]; 703 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 704 length); 705 if (error) 706 panic("ram_attach: resource %d failed set with %d", rid, 707 error); 708 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 709 if (res == NULL) 710 panic("ram_attach: resource %d failed to attach", rid); 711 } 712 return (0); 713} 714 715static device_method_t ram_methods[] = { 716 /* Device interface */ 717 DEVMETHOD(device_identify, ram_identify), 718 DEVMETHOD(device_probe, ram_probe), 719 DEVMETHOD(device_attach, ram_attach), 720 721 DEVMETHOD_END 722}; 723 724static driver_t ram_driver = { 725 "ram", 726 ram_methods, 727 1, /* no softc */ 728}; 729 730DRIVER_MODULE(ram, nexus, ram_driver, 0, 0); 731 732#ifdef DEV_ISA 733/* 734 * Placeholder which claims PnP 'devices' which describe system 735 * resources. 736 */ 737static struct isa_pnp_id sysresource_ids[] = { 738 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 739 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 740 { 0 } 741}; 742 743static int 744sysresource_probe(device_t dev) 745{ 746 int result; 747 748 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 749 device_quiet(dev); 750 } 751 return (result); 752} 753 754static int 755sysresource_attach(device_t dev) 756{ 757 return (0); 758} 759 760static device_method_t sysresource_methods[] = { 761 /* Device interface */ 762 DEVMETHOD(device_probe, sysresource_probe), 763 DEVMETHOD(device_attach, sysresource_attach), 764 DEVMETHOD(device_detach, bus_generic_detach), 765 DEVMETHOD(device_shutdown, bus_generic_shutdown), 766 DEVMETHOD(device_suspend, bus_generic_suspend), 767 DEVMETHOD(device_resume, bus_generic_resume), 768 769 DEVMETHOD_END 770}; 771 772static driver_t sysresource_driver = { 773 "sysresource", 774 sysresource_methods, 775 1, /* no softc */ 776}; 777 778DRIVER_MODULE(sysresource, isa, sysresource_driver, 0, 0); 779ISA_PNP_INFO(sysresource_ids); 780#endif /* DEV_ISA */ 781