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__FBSDID("$FreeBSD$"); 32 33/* 34 * This code implements a `root nexus' for Intel Architecture 35 * machines. The function of the root nexus is to serve as an 36 * attachment point for both processors and buses, and to manage 37 * resources which are common to all of them. In particular, 38 * this code implements the core resource managers for interrupt 39 * requests, DMA requests (which rightfully should be a part of the 40 * ISA code but it's easier to do it here for now), I/O port addresses, 41 * and I/O memory address space. 42 */ 43 44#ifdef __amd64__ 45#define DEV_APIC 46#else 47#include "opt_apic.h" 48#endif 49#include "opt_isa.h" 50 51#include <sys/param.h> 52#include <sys/systm.h> 53#include <sys/bus.h> 54#include <sys/kernel.h> 55#include <sys/linker.h> 56#include <sys/malloc.h> 57#include <sys/module.h> 58#include <machine/bus.h> 59#include <machine/intr_machdep.h> 60#include <sys/rman.h> 61#include <sys/interrupt.h> 62 63#include <machine/vmparam.h> 64#include <vm/vm.h> 65#include <vm/pmap.h> 66#include <machine/pmap.h> 67 68#include <machine/metadata.h> 69#include <machine/nexusvar.h> 70#include <machine/resource.h> 71#include <machine/pc/bios.h> 72 73#ifdef DEV_APIC 74#include "pcib_if.h" 75#endif 76 77#ifdef DEV_ISA 78#include <isa/isavar.h> 79#ifdef PC98 80#include <pc98/cbus/cbus.h> 81#else 82#include <x86/isa/isa.h> 83#endif 84#endif 85#include <sys/rtprio.h> 86 87#define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel") 88 89static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 90 91#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 92 93struct rman irq_rman, drq_rman, port_rman, mem_rman; 94 95static int nexus_probe(device_t); 96static int nexus_attach(device_t); 97static int nexus_print_all_resources(device_t dev); 98static int nexus_print_child(device_t, device_t); 99static device_t nexus_add_child(device_t bus, u_int order, const char *name, 100 int unit); 101static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 102 u_long, u_long, u_long, u_int); 103static int nexus_adjust_resource(device_t, device_t, int, struct resource *, 104 u_long, u_long); 105#ifdef SMP 106static int nexus_bind_intr(device_t, device_t, struct resource *, int); 107#endif 108static int nexus_config_intr(device_t, int, enum intr_trigger, 109 enum intr_polarity); 110static int nexus_describe_intr(device_t dev, device_t child, 111 struct resource *irq, void *cookie, 112 const char *descr); 113static int nexus_activate_resource(device_t, device_t, int, int, 114 struct resource *); 115static int nexus_deactivate_resource(device_t, device_t, int, int, 116 struct resource *); 117static int nexus_release_resource(device_t, device_t, int, int, 118 struct resource *); 119static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 120 driver_filter_t filter, void (*)(void *), void *, 121 void **); 122static int nexus_teardown_intr(device_t, device_t, struct resource *, 123 void *); 124static struct resource_list *nexus_get_reslist(device_t dev, device_t child); 125static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); 126static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *); 127static void nexus_delete_resource(device_t, device_t, int, int); 128#ifdef DEV_APIC 129static int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs); 130static int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs); 131static int nexus_alloc_msix(device_t pcib, device_t dev, int *irq); 132static int nexus_release_msix(device_t pcib, device_t dev, int irq); 133static int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data); 134#endif 135 136static device_method_t nexus_methods[] = { 137 /* Device interface */ 138 DEVMETHOD(device_probe, nexus_probe), 139 DEVMETHOD(device_attach, nexus_attach), 140 DEVMETHOD(device_detach, bus_generic_detach), 141 DEVMETHOD(device_shutdown, bus_generic_shutdown), 142 DEVMETHOD(device_suspend, bus_generic_suspend), 143 DEVMETHOD(device_resume, bus_generic_resume), 144 145 /* Bus interface */ 146 DEVMETHOD(bus_print_child, nexus_print_child), 147 DEVMETHOD(bus_add_child, nexus_add_child), 148 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 149 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource), 150 DEVMETHOD(bus_release_resource, nexus_release_resource), 151 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 152 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 153 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 154 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 155#ifdef SMP 156 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 157#endif 158 DEVMETHOD(bus_config_intr, nexus_config_intr), 159 DEVMETHOD(bus_describe_intr, nexus_describe_intr), 160 DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 161 DEVMETHOD(bus_set_resource, nexus_set_resource), 162 DEVMETHOD(bus_get_resource, nexus_get_resource), 163 DEVMETHOD(bus_delete_resource, nexus_delete_resource), 164 165 /* pcib interface */ 166#ifdef DEV_APIC 167 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi), 168 DEVMETHOD(pcib_release_msi, nexus_release_msi), 169 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix), 170 DEVMETHOD(pcib_release_msix, nexus_release_msix), 171 DEVMETHOD(pcib_map_msi, nexus_map_msi), 172#endif 173 174 { 0, 0 } 175}; 176 177DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 178static devclass_t nexus_devclass; 179 180DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 181 182static int 183nexus_probe(device_t dev) 184{ 185 186 device_quiet(dev); /* suppress attach message for neatness */ 187 return (BUS_PROBE_GENERIC); 188} 189 190void 191nexus_init_resources(void) 192{ 193 int irq; 194 195 /* 196 * XXX working notes: 197 * 198 * - IRQ resource creation should be moved to the PIC/APIC driver. 199 * - DRQ resource creation should be moved to the DMAC driver. 200 * - The above should be sorted to probe earlier than any child busses. 201 * 202 * - Leave I/O and memory creation here, as child probes may need them. 203 * (especially eg. ACPI) 204 */ 205 206 /* 207 * IRQ's are on the mainboard on old systems, but on the ISA part 208 * of PCI->ISA bridges. There would be multiple sets of IRQs on 209 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 210 * component, so in a way, PCI can be a partial child of an ISA bus(!). 211 * APIC interrupts are global though. 212 */ 213 irq_rman.rm_start = 0; 214 irq_rman.rm_type = RMAN_ARRAY; 215 irq_rman.rm_descr = "Interrupt request lines"; 216 irq_rman.rm_end = NUM_IO_INTS - 1; 217 if (rman_init(&irq_rman)) 218 panic("nexus_init_resources irq_rman"); 219 220 /* 221 * We search for regions of existing IRQs and add those to the IRQ 222 * resource manager. 223 */ 224 for (irq = 0; irq < NUM_IO_INTS; irq++) 225 if (intr_lookup_source(irq) != NULL) 226 if (rman_manage_region(&irq_rman, irq, irq) != 0) 227 panic("nexus_init_resources irq_rman add"); 228 229 /* 230 * ISA DMA on PCI systems is implemented in the ISA part of each 231 * PCI->ISA bridge and the channels can be duplicated if there are 232 * multiple bridges. (eg: laptops with docking stations) 233 */ 234 drq_rman.rm_start = 0; 235#ifdef PC98 236 drq_rman.rm_end = 3; 237#else 238 drq_rman.rm_end = 7; 239#endif 240 drq_rman.rm_type = RMAN_ARRAY; 241 drq_rman.rm_descr = "DMA request lines"; 242 /* XXX drq 0 not available on some machines */ 243 if (rman_init(&drq_rman) 244 || rman_manage_region(&drq_rman, 245 drq_rman.rm_start, drq_rman.rm_end)) 246 panic("nexus_init_resources drq_rman"); 247 248 /* 249 * However, IO ports and Memory truely are global at this level, 250 * as are APIC interrupts (however many IO APICS there turn out 251 * to be on large systems..) 252 */ 253 port_rman.rm_start = 0; 254 port_rman.rm_end = 0xffff; 255 port_rman.rm_type = RMAN_ARRAY; 256 port_rman.rm_descr = "I/O ports"; 257 if (rman_init(&port_rman) 258 || rman_manage_region(&port_rman, 0, 0xffff)) 259 panic("nexus_init_resources port_rman"); 260 261 mem_rman.rm_start = 0; 262 mem_rman.rm_end = ~0ul; 263 mem_rman.rm_type = RMAN_ARRAY; 264 mem_rman.rm_descr = "I/O memory addresses"; 265 if (rman_init(&mem_rman) 266 || rman_manage_region(&mem_rman, 0, ~0)) 267 panic("nexus_init_resources mem_rman"); 268} 269 270static int 271nexus_attach(device_t dev) 272{ 273 274 nexus_init_resources(); 275 bus_generic_probe(dev); 276 277 /* 278 * Explicitly add the legacy0 device here. Other platform 279 * types (such as ACPI), use their own nexus(4) subclass 280 * driver to override this routine and add their own root bus. 281 */ 282 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL) 283 panic("legacy: could not attach"); 284 bus_generic_attach(dev); 285 return 0; 286} 287 288static int 289nexus_print_all_resources(device_t dev) 290{ 291 struct nexus_device *ndev = DEVTONX(dev); 292 struct resource_list *rl = &ndev->nx_resources; 293 int retval = 0; 294 295 if (STAILQ_FIRST(rl)) 296 retval += printf(" at"); 297 298 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 299 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 300 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 301 302 return retval; 303} 304 305static int 306nexus_print_child(device_t bus, device_t child) 307{ 308 int retval = 0; 309 310 retval += bus_print_child_header(bus, child); 311 retval += nexus_print_all_resources(child); 312 if (device_get_flags(child)) 313 retval += printf(" flags %#x", device_get_flags(child)); 314 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 315 316 return (retval); 317} 318 319static device_t 320nexus_add_child(device_t bus, u_int order, const char *name, int unit) 321{ 322 device_t child; 323 struct nexus_device *ndev; 324 325 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 326 if (!ndev) 327 return(0); 328 resource_list_init(&ndev->nx_resources); 329 330 child = device_add_child_ordered(bus, order, name, unit); 331 332 /* should we free this in nexus_child_detached? */ 333 device_set_ivars(child, ndev); 334 335 return(child); 336} 337 338static struct rman * 339nexus_rman(int type) 340{ 341 switch (type) { 342 case SYS_RES_IRQ: 343 return (&irq_rman); 344 case SYS_RES_DRQ: 345 return (&drq_rman); 346 case SYS_RES_IOPORT: 347 return (&port_rman); 348 case SYS_RES_MEMORY: 349 return (&mem_rman); 350 default: 351 return (NULL); 352 } 353} 354 355/* 356 * Allocate a resource on behalf of child. NB: child is usually going to be a 357 * child of one of our descendants, not a direct child of nexus0. 358 * (Exceptions include npx.) 359 */ 360static struct resource * 361nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 362 u_long start, u_long end, u_long count, u_int flags) 363{ 364 struct nexus_device *ndev = DEVTONX(child); 365 struct resource *rv; 366 struct resource_list_entry *rle; 367 struct rman *rm; 368 int needactivate = flags & RF_ACTIVE; 369 370 /* 371 * If this is an allocation of the "default" range for a given RID, and 372 * we know what the resources for this device are (ie. they aren't maintained 373 * by a child bus), then work out the start/end values. 374 */ 375 if ((start == 0UL) && (end == ~0UL) && (count == 1)) { 376 if (ndev == NULL) 377 return(NULL); 378 rle = resource_list_find(&ndev->nx_resources, type, *rid); 379 if (rle == NULL) 380 return(NULL); 381 start = rle->start; 382 end = rle->end; 383 count = rle->count; 384 } 385 386 flags &= ~RF_ACTIVE; 387 rm = nexus_rman(type); 388 if (rm == NULL) 389 return (NULL); 390 391 rv = rman_reserve_resource(rm, start, end, count, flags, child); 392 if (rv == 0) 393 return 0; 394 rman_set_rid(rv, *rid); 395 396 if (needactivate) { 397 if (bus_activate_resource(child, type, *rid, rv)) { 398 rman_release_resource(rv); 399 return 0; 400 } 401 } 402 403 return rv; 404} 405 406static int 407nexus_adjust_resource(device_t bus, device_t child, int type, 408 struct resource *r, u_long start, u_long end) 409{ 410 struct rman *rm; 411 412 rm = nexus_rman(type); 413 if (rm == NULL) 414 return (ENXIO); 415 if (!rman_is_region_manager(r, rm)) 416 return (EINVAL); 417 return (rman_adjust_resource(r, start, end)); 418} 419 420static int 421nexus_activate_resource(device_t bus, device_t child, int type, int rid, 422 struct resource *r) 423{ 424#ifdef PC98 425 bus_space_handle_t bh; 426 int error; 427#endif 428 void *vaddr; 429 430 /* 431 * If this is a memory resource, map it into the kernel. 432 */ 433 switch (type) { 434 case SYS_RES_IOPORT: 435#ifdef PC98 436 error = i386_bus_space_handle_alloc(X86_BUS_SPACE_IO, 437 rman_get_start(r), rman_get_size(r), &bh); 438 if (error) 439 return (error); 440 rman_set_bushandle(r, bh); 441#else 442 rman_set_bushandle(r, rman_get_start(r)); 443#endif 444 rman_set_bustag(r, X86_BUS_SPACE_IO); 445 break; 446 case SYS_RES_MEMORY: 447#ifdef PC98 448 error = i386_bus_space_handle_alloc(X86_BUS_SPACE_MEM, 449 rman_get_start(r), rman_get_size(r), &bh); 450 if (error) 451 return (error); 452#endif 453 vaddr = pmap_mapdev(rman_get_start(r), rman_get_size(r)); 454 rman_set_virtual(r, vaddr); 455 rman_set_bustag(r, X86_BUS_SPACE_MEM); 456#ifdef PC98 457 /* PC-98: the type of bus_space_handle_t is the structure. */ 458 bh->bsh_base = (bus_addr_t) vaddr; 459 rman_set_bushandle(r, bh); 460#else 461 /* IBM-PC: the type of bus_space_handle_t is u_int */ 462 rman_set_bushandle(r, (bus_space_handle_t) vaddr); 463#endif 464 } 465 return (rman_activate_resource(r)); 466} 467 468static int 469nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 470 struct resource *r) 471{ 472 473 /* 474 * If this is a memory resource, unmap it. 475 */ 476 if (type == SYS_RES_MEMORY) { 477 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), 478 rman_get_size(r)); 479 } 480#ifdef PC98 481 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 482 bus_space_handle_t bh; 483 484 bh = rman_get_bushandle(r); 485 i386_bus_space_handle_free(rman_get_bustag(r), bh, bh->bsh_sz); 486 } 487#endif 488 return (rman_deactivate_resource(r)); 489} 490 491static int 492nexus_release_resource(device_t bus, device_t child, int type, int rid, 493 struct resource *r) 494{ 495 if (rman_get_flags(r) & RF_ACTIVE) { 496 int error = bus_deactivate_resource(child, type, rid, r); 497 if (error) 498 return error; 499 } 500 return (rman_release_resource(r)); 501} 502 503/* 504 * Currently this uses the really grody interface from kern/kern_intr.c 505 * (which really doesn't belong in kern/anything.c). Eventually, all of 506 * the code in kern_intr.c and machdep_intr.c should get moved here, since 507 * this is going to be the official interface. 508 */ 509static int 510nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 511 int flags, driver_filter_t filter, void (*ihand)(void *), 512 void *arg, void **cookiep) 513{ 514 int error; 515 516 /* somebody tried to setup an irq that failed to allocate! */ 517 if (irq == NULL) 518 panic("nexus_setup_intr: NULL irq resource!"); 519 520 *cookiep = 0; 521 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0) 522 flags |= INTR_EXCL; 523 524 /* 525 * We depend here on rman_activate_resource() being idempotent. 526 */ 527 error = rman_activate_resource(irq); 528 if (error) 529 return (error); 530 531 error = intr_add_handler(device_get_nameunit(child), 532 rman_get_start(irq), filter, ihand, arg, flags, cookiep); 533 534 return (error); 535} 536 537static int 538nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 539{ 540 return (intr_remove_handler(ih)); 541} 542 543#ifdef SMP 544static int 545nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) 546{ 547 return (intr_bind(rman_get_start(irq), cpu)); 548} 549#endif 550 551static int 552nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 553 enum intr_polarity pol) 554{ 555 return (intr_config_intr(irq, trig, pol)); 556} 557 558static int 559nexus_describe_intr(device_t dev, device_t child, struct resource *irq, 560 void *cookie, const char *descr) 561{ 562 563 return (intr_describe(rman_get_start(irq), cookie, descr)); 564} 565 566static struct resource_list * 567nexus_get_reslist(device_t dev, device_t child) 568{ 569 struct nexus_device *ndev = DEVTONX(child); 570 571 return (&ndev->nx_resources); 572} 573 574static int 575nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 576{ 577 struct nexus_device *ndev = DEVTONX(child); 578 struct resource_list *rl = &ndev->nx_resources; 579 580 /* XXX this should return a success/failure indicator */ 581 resource_list_add(rl, type, rid, start, start + count - 1, count); 582 return(0); 583} 584 585static int 586nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 587{ 588 struct nexus_device *ndev = DEVTONX(child); 589 struct resource_list *rl = &ndev->nx_resources; 590 struct resource_list_entry *rle; 591 592 rle = resource_list_find(rl, type, rid); 593 if (!rle) 594 return(ENOENT); 595 if (startp) 596 *startp = rle->start; 597 if (countp) 598 *countp = rle->count; 599 return(0); 600} 601 602static void 603nexus_delete_resource(device_t dev, device_t child, int type, int rid) 604{ 605 struct nexus_device *ndev = DEVTONX(child); 606 struct resource_list *rl = &ndev->nx_resources; 607 608 resource_list_delete(rl, type, rid); 609} 610 611/* Called from the MSI code to add new IRQs to the IRQ rman. */ 612void 613nexus_add_irq(u_long irq) 614{ 615 616 if (rman_manage_region(&irq_rman, irq, irq) != 0) 617 panic("%s: failed", __func__); 618} 619 620#ifdef DEV_APIC 621static int 622nexus_alloc_msix(device_t pcib, device_t dev, int *irq) 623{ 624 625 return (msix_alloc(dev, irq)); 626} 627 628static int 629nexus_release_msix(device_t pcib, device_t dev, int irq) 630{ 631 632 return (msix_release(irq)); 633} 634 635static int 636nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs) 637{ 638 639 return (msi_alloc(dev, count, maxcount, irqs)); 640} 641 642static int 643nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs) 644{ 645 646 return (msi_release(irqs, count)); 647} 648 649static int 650nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data) 651{ 652 653 return (msi_map(irq, addr, data)); 654} 655#endif 656 657/* Placeholder for system RAM. */ 658static void 659ram_identify(driver_t *driver, device_t parent) 660{ 661 662 if (resource_disabled("ram", 0)) 663 return; 664 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL) 665 panic("ram_identify"); 666} 667 668static int 669ram_probe(device_t dev) 670{ 671 672 device_quiet(dev); 673 device_set_desc(dev, "System RAM"); 674 return (0); 675} 676 677static int 678ram_attach(device_t dev) 679{ 680 struct bios_smap *smapbase, *smap, *smapend; 681 struct resource *res; 682 vm_paddr_t *p; 683 caddr_t kmdp; 684 uint32_t smapsize; 685 int error, rid; 686 687 /* Retrieve the system memory map from the loader. */ 688 kmdp = preload_search_by_type("elf kernel"); 689 if (kmdp == NULL) 690 kmdp = preload_search_by_type(ELF_KERN_STR); 691 if (kmdp != NULL) 692 smapbase = (struct bios_smap *)preload_search_info(kmdp, 693 MODINFO_METADATA | MODINFOMD_SMAP); 694 else 695 smapbase = NULL; 696 if (smapbase != NULL) { 697 smapsize = *((u_int32_t *)smapbase - 1); 698 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); 699 700 rid = 0; 701 for (smap = smapbase; smap < smapend; smap++) { 702 if (smap->type != SMAP_TYPE_MEMORY || 703 smap->length == 0) 704 continue; 705#ifdef __i386__ 706 /* 707 * Resources use long's to track resources, so 708 * we can't include memory regions above 4GB. 709 */ 710 if (smap->base > ~0ul) 711 continue; 712#endif 713 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, 714 smap->base, smap->length); 715 if (error) 716 panic( 717 "ram_attach: resource %d failed set with %d", 718 rid, error); 719 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 720 0); 721 if (res == NULL) 722 panic("ram_attach: resource %d failed to attach", 723 rid); 724 rid++; 725 } 726 return (0); 727 } 728 729 /* 730 * If the system map is not available, fall back to using 731 * dump_avail[]. We use the dump_avail[] array rather than 732 * phys_avail[] for the memory map as phys_avail[] contains 733 * holes for kernel memory, page 0, the message buffer, and 734 * the dcons buffer. We test the end address in the loop 735 * instead of the start since the start address for the first 736 * segment is 0. 737 */ 738 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) { 739#ifdef PAE 740 /* 741 * Resources use long's to track resources, so we can't 742 * include memory regions above 4GB. 743 */ 744 if (p[0] > ~0ul) 745 break; 746#endif 747 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0], 748 p[1] - p[0]); 749 if (error) 750 panic("ram_attach: resource %d failed set with %d", rid, 751 error); 752 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); 753 if (res == NULL) 754 panic("ram_attach: resource %d failed to attach", rid); 755 } 756 return (0); 757} 758 759static device_method_t ram_methods[] = { 760 /* Device interface */ 761 DEVMETHOD(device_identify, ram_identify), 762 DEVMETHOD(device_probe, ram_probe), 763 DEVMETHOD(device_attach, ram_attach), 764 { 0, 0 } 765}; 766 767static driver_t ram_driver = { 768 "ram", 769 ram_methods, 770 1, /* no softc */ 771}; 772 773static devclass_t ram_devclass; 774 775DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, 0, 0); 776 777#ifdef DEV_ISA 778/* 779 * Placeholder which claims PnP 'devices' which describe system 780 * resources. 781 */ 782static struct isa_pnp_id sysresource_ids[] = { 783 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 784 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 785 { 0 } 786}; 787 788static int 789sysresource_probe(device_t dev) 790{ 791 int result; 792 793 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 794 device_quiet(dev); 795 } 796 return(result); 797} 798 799static int 800sysresource_attach(device_t dev) 801{ 802 return(0); 803} 804 805static device_method_t sysresource_methods[] = { 806 /* Device interface */ 807 DEVMETHOD(device_probe, sysresource_probe), 808 DEVMETHOD(device_attach, sysresource_attach), 809 DEVMETHOD(device_detach, bus_generic_detach), 810 DEVMETHOD(device_shutdown, bus_generic_shutdown), 811 DEVMETHOD(device_suspend, bus_generic_suspend), 812 DEVMETHOD(device_resume, bus_generic_resume), 813 { 0, 0 } 814}; 815 816static driver_t sysresource_driver = { 817 "sysresource", 818 sysresource_methods, 819 1, /* no softc */ 820}; 821 822static devclass_t sysresource_devclass; 823 824DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 825#endif /* DEV_ISA */ 826