legacy.c revision 66416
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 * $FreeBSD: head/sys/i386/i386/legacy.c 66416 2000-09-28 00:37:32Z peter $ 30 */ 31 32/* 33 * This code implements a `root nexus' for Intel Architecture 34 * machines. The function of the root nexus is to serve as an 35 * attachment point for both processors and buses, and to manage 36 * resources which are common to all of them. In particular, 37 * this code implements the core resource managers for interrupt 38 * requests, DMA requests (which rightfully should be a part of the 39 * ISA code but it's easier to do it here for now), I/O port addresses, 40 * and I/O memory address space. 41 */ 42 43#include "mca.h" 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 <machine/bus.h> 52#include <sys/rman.h> 53#include <sys/interrupt.h> 54 55#include <machine/vmparam.h> 56#include <vm/vm.h> 57#include <vm/pmap.h> 58#include <machine/pmap.h> 59 60#include <machine/nexusvar.h> 61#include <machine/resource.h> 62#ifdef APIC_IO 63#include <machine/smp.h> 64#include <machine/mpapic.h> 65#endif 66 67#include <isa/isavar.h> 68#ifdef PC98 69#include <pc98/pc98/pc98.h> 70#else 71#include <i386/isa/isa.h> 72#endif 73#include <sys/proc.h> 74#include <i386/isa/icu.h> 75#include <i386/isa/intr_machdep.h> 76#include <sys/rtprio.h> 77 78MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 79 80struct nexus_device { 81 struct resource_list nx_resources; 82 int nx_pcibus; 83}; 84 85#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 86 87static struct rman irq_rman, drq_rman, port_rman, mem_rman; 88 89static int nexus_probe(device_t); 90static int nexus_attach(device_t); 91static int nexus_print_resources(struct resource_list *rl, const char *name, int type, 92 const char *format); 93static int nexus_print_all_resources(device_t dev); 94static int nexus_print_child(device_t, device_t); 95static device_t nexus_add_child(device_t bus, int order, const char *name, 96 int unit); 97static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 98 u_long, u_long, u_long, u_int); 99static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); 100static int nexus_write_ivar(device_t, device_t, int, uintptr_t); 101static int nexus_activate_resource(device_t, device_t, int, int, 102 struct resource *); 103static int nexus_deactivate_resource(device_t, device_t, int, int, 104 struct resource *); 105static int nexus_release_resource(device_t, device_t, int, int, 106 struct resource *); 107static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 108 void (*)(void *), void *, void **); 109static int nexus_teardown_intr(device_t, device_t, struct resource *, 110 void *); 111static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); 112static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *); 113static void nexus_delete_resource(device_t, device_t, int, int); 114 115static device_method_t nexus_methods[] = { 116 /* Device interface */ 117 DEVMETHOD(device_probe, nexus_probe), 118 DEVMETHOD(device_attach, nexus_attach), 119 DEVMETHOD(device_detach, bus_generic_detach), 120 DEVMETHOD(device_shutdown, bus_generic_shutdown), 121 DEVMETHOD(device_suspend, bus_generic_suspend), 122 DEVMETHOD(device_resume, bus_generic_resume), 123 124 /* Bus interface */ 125 DEVMETHOD(bus_print_child, nexus_print_child), 126 DEVMETHOD(bus_add_child, nexus_add_child), 127 DEVMETHOD(bus_read_ivar, nexus_read_ivar), 128 DEVMETHOD(bus_write_ivar, nexus_write_ivar), 129 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 130 DEVMETHOD(bus_release_resource, nexus_release_resource), 131 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 132 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 133 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 134 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 135 DEVMETHOD(bus_set_resource, nexus_set_resource), 136 DEVMETHOD(bus_get_resource, nexus_get_resource), 137 DEVMETHOD(bus_delete_resource, nexus_delete_resource), 138 139 { 0, 0 } 140}; 141 142static driver_t nexus_driver = { 143 "nexus", 144 nexus_methods, 145 1, /* no softc */ 146}; 147static devclass_t nexus_devclass; 148 149DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 150 151static int 152nexus_probe(device_t dev) 153{ 154 155 device_quiet(dev); /* suppress attach message for neatness */ 156 157 /* 158 * XXX working notes: 159 * 160 * - IRQ resource creation should be moved to the PIC/APIC driver. 161 * - DRQ resource creation should be moved to the DMAC driver. 162 * - The above should be sorted to probe earlier than any child busses. 163 * 164 * - Leave I/O and memory creation here, as child probes may need them. 165 * (especially eg. ACPI) 166 */ 167 168 /* 169 * IRQ's are on the mainboard on old systems, but on the ISA part 170 * of PCI->ISA bridges. There would be multiple sets of IRQs on 171 * multi-ISA-bus systems. PCI interrupts are routed to the ISA 172 * component, so in a way, PCI can be a partial child of an ISA bus(!). 173 * APIC interrupts are global though. 174 * 175 * XXX We depend on the AT PIC driver correctly claiming IRQ 2 176 * to prevent its reuse elsewhere in the !APIC_IO case. 177 */ 178 irq_rman.rm_start = 0; 179 irq_rman.rm_type = RMAN_ARRAY; 180 irq_rman.rm_descr = "Interrupt request lines"; 181#ifdef APIC_IO 182 irq_rman.rm_end = APIC_INTMAPSIZE - 1; 183#else 184 irq_rman.rm_end = 15; 185#endif 186 if (rman_init(&irq_rman) 187 || rman_manage_region(&irq_rman, 188 irq_rman.rm_start, irq_rman.rm_end)) 189 panic("nexus_probe irq_rman"); 190 191 /* 192 * ISA DMA on PCI systems is implemented in the ISA part of each 193 * PCI->ISA bridge and the channels can be duplicated if there are 194 * multiple bridges. (eg: laptops with docking stations) 195 */ 196 drq_rman.rm_start = 0; 197#ifdef PC98 198 drq_rman.rm_end = 3; 199#else 200 drq_rman.rm_end = 7; 201#endif 202 drq_rman.rm_type = RMAN_ARRAY; 203 drq_rman.rm_descr = "DMA request lines"; 204 /* XXX drq 0 not available on some machines */ 205 if (rman_init(&drq_rman) 206 || rman_manage_region(&drq_rman, 207 drq_rman.rm_start, drq_rman.rm_end)) 208 panic("nexus_probe drq_rman"); 209 210 /* 211 * However, IO ports and Memory truely are global at this level, 212 * as are APIC interrupts (however many IO APICS there turn out 213 * to be on large systems..) 214 */ 215 port_rman.rm_start = 0; 216 port_rman.rm_end = 0xffff; 217 port_rman.rm_type = RMAN_ARRAY; 218 port_rman.rm_descr = "I/O ports"; 219 if (rman_init(&port_rman) 220 || rman_manage_region(&port_rman, 0, 0xffff)) 221 panic("nexus_probe port_rman"); 222 223 mem_rman.rm_start = 0; 224 mem_rman.rm_end = ~0u; 225 mem_rman.rm_type = RMAN_ARRAY; 226 mem_rman.rm_descr = "I/O memory addresses"; 227 if (rman_init(&mem_rman) 228 || rman_manage_region(&mem_rman, 0, ~0)) 229 panic("nexus_probe mem_rman"); 230 231 return bus_generic_probe(dev); 232} 233 234static int 235nexus_attach(device_t dev) 236{ 237 device_t child; 238 239 /* 240 * First, deal with the children we know about already 241 */ 242 bus_generic_attach(dev); 243 /* 244 * And if we didn't see EISA or ISA on a pci bridge, create some 245 * connection points now so they show up "on motherboard". 246 */ 247 if (!devclass_get_device(devclass_find("eisa"), 0)) { 248 child = device_add_child(dev, "eisa", 0); 249 if (child == NULL) 250 panic("nexus_attach eisa"); 251 device_probe_and_attach(child); 252 } 253#if NMCA > 0 254 if (!devclass_get_device(devclass_find("mca"), 0)) { 255 child = device_add_child(dev, "mca", 0); 256 if (child == 0) 257 panic("nexus_probe mca"); 258 device_probe_and_attach(child); 259 } 260#endif 261 if (!devclass_get_device(devclass_find("isa"), 0)) { 262 child = device_add_child(dev, "isa", 0); 263 if (child == NULL) 264 panic("nexus_attach isa"); 265 device_probe_and_attach(child); 266 } 267 268 return 0; 269} 270 271static int 272nexus_print_resources(struct resource_list *rl, const char *name, int type, 273 const char *format) 274{ 275 struct resource_list_entry *rle; 276 int printed, retval; 277 278 printed = 0; 279 retval = 0; 280 /* Yes, this is kinda cheating */ 281 SLIST_FOREACH(rle, rl, link) { 282 if (rle->type == type) { 283 if (printed == 0) 284 retval += printf(" %s ", name); 285 else if (printed > 0) 286 retval += printf(","); 287 printed++; 288 retval += printf(format, rle->start); 289 if (rle->count > 1) { 290 retval += printf("-"); 291 retval += printf(format, rle->start + 292 rle->count - 1); 293 } 294 } 295 } 296 return retval; 297} 298 299static int 300nexus_print_all_resources(device_t dev) 301{ 302 struct nexus_device *ndev = DEVTONX(dev); 303 struct resource_list *rl = &ndev->nx_resources; 304 int retval = 0; 305 306 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1) 307 retval += printf(" at"); 308 309 retval += nexus_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 310 retval += nexus_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 311 retval += nexus_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 312 313 return retval; 314} 315 316static int 317nexus_print_child(device_t bus, device_t child) 318{ 319 struct nexus_device *ndev = DEVTONX(child); 320 int retval = 0; 321 322 retval += bus_print_child_header(bus, child); 323 retval += nexus_print_all_resources(child); 324 if (ndev->nx_pcibus != -1) 325 retval += printf(" pcibus %d", ndev->nx_pcibus); 326 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 327 328 return (retval); 329} 330 331static device_t 332nexus_add_child(device_t bus, int order, const char *name, int unit) 333{ 334 device_t child; 335 struct nexus_device *ndev; 336 337 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT); 338 if (!ndev) 339 return(0); 340 bzero(ndev, sizeof(struct nexus_device)); 341 resource_list_init(&ndev->nx_resources); 342 ndev->nx_pcibus = -1; 343 344 child = device_add_child_ordered(bus, order, name, unit); 345 346 /* should we free this in nexus_child_detached? */ 347 device_set_ivars(child, ndev); 348 349 return(child); 350} 351 352static int 353nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 354{ 355 struct nexus_device *ndev = DEVTONX(child); 356 357 switch (which) { 358 case NEXUS_IVAR_PCIBUS: 359 *result = ndev->nx_pcibus; 360 break; 361 default: 362 return ENOENT; 363 } 364 return 0; 365} 366 367 368static int 369nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 370{ 371 struct nexus_device *ndev = DEVTONX(child); 372 373 switch (which) { 374 case NEXUS_IVAR_PCIBUS: 375 ndev->nx_pcibus = value; 376 break; 377 default: 378 return ENOENT; 379 } 380 return 0; 381} 382 383 384/* 385 * Allocate a resource on behalf of child. NB: child is usually going to be a 386 * child of one of our descendants, not a direct child of nexus0. 387 * (Exceptions include npx.) 388 */ 389static struct resource * 390nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 391 u_long start, u_long end, u_long count, u_int flags) 392{ 393 struct nexus_device *ndev = DEVTONX(child); 394 struct resource *rv; 395 struct resource_list_entry *rle; 396 struct rman *rm; 397 int needactivate = flags & RF_ACTIVE; 398 399 /* 400 * If this is an allocation of the "default" range for a given RID, and 401 * we know what the resources for this device are (ie. they aren't maintained 402 * by a child bus), then work out the start/end values. 403 */ 404 if ((start == 0UL) && (end == ~0UL) && (count == 1)) { 405 if (ndev == NULL) 406 return(NULL); 407 rle = resource_list_find(&ndev->nx_resources, type, *rid); 408 if (rle == NULL) 409 return(NULL); 410 start = rle->start; 411 end = rle->end; 412 count = rle->count; 413 } 414 415 flags &= ~RF_ACTIVE; 416 417 switch (type) { 418 case SYS_RES_IRQ: 419 rm = &irq_rman; 420 break; 421 422 case SYS_RES_DRQ: 423 rm = &drq_rman; 424 break; 425 426 case SYS_RES_IOPORT: 427 rm = &port_rman; 428 break; 429 430 case SYS_RES_MEMORY: 431 rm = &mem_rman; 432 break; 433 434 default: 435 return 0; 436 } 437 438 rv = rman_reserve_resource(rm, start, end, count, flags, child); 439 if (rv == 0) 440 return 0; 441 442 if (type == SYS_RES_MEMORY) { 443 rman_set_bustag(rv, I386_BUS_SPACE_MEM); 444 } else if (type == SYS_RES_IOPORT) { 445 rman_set_bustag(rv, I386_BUS_SPACE_IO); 446#ifdef PC98 447 /* PC-98: the type of bus_space_handle_t is the structure. */ 448 rv->r_bushandle.bsh_base = rv->r_start; 449 rv->r_bushandle.bsh_iat = NULL; 450 rv->r_bushandle.bsh_iatsz = 0; 451 rv->r_bushandle.bsh_res = NULL; 452 rv->r_bushandle.bsh_ressz = 0; 453#else 454 /* IBM-PC: the type of bus_space_handle_t is u_int */ 455 rman_set_bushandle(rv, rv->r_start); 456#endif 457 } 458 459 if (needactivate) { 460 if (bus_activate_resource(child, type, *rid, rv)) { 461 rman_release_resource(rv); 462 return 0; 463 } 464 } 465 466 return rv; 467} 468 469static int 470nexus_activate_resource(device_t bus, device_t child, int type, int rid, 471 struct resource *r) 472{ 473 /* 474 * If this is a memory resource, map it into the kernel. 475 */ 476 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) { 477 caddr_t vaddr = 0; 478 479 if (r->r_end < 1024 * 1024) { 480 /* 481 * The first 1Mb is mapped at KERNBASE. 482 */ 483 vaddr = (caddr_t)(uintptr_t)(KERNBASE + r->r_start); 484 } else { 485 u_int32_t paddr; 486 u_int32_t psize; 487 u_int32_t poffs; 488 489 paddr = r->r_start; 490 psize = r->r_end - r->r_start; 491 492 poffs = paddr - trunc_page(paddr); 493 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs; 494 } 495 rman_set_virtual(r, vaddr); 496#ifdef PC98 497 /* PC-98: the type of bus_space_handle_t is the structure. */ 498 r->r_bushandle.bsh_base = (bus_addr_t) vaddr; 499 r->r_bushandle.bsh_iat = NULL; 500 r->r_bushandle.bsh_iatsz = 0; 501 r->r_bushandle.bsh_res = NULL; 502 r->r_bushandle.bsh_ressz = 0; 503#else 504 /* IBM-PC: the type of bus_space_handle_t is u_int */ 505 rman_set_bushandle(r, (bus_space_handle_t) vaddr); 506#endif 507 } 508 return (rman_activate_resource(r)); 509} 510 511static int 512nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 513 struct resource *r) 514{ 515 /* 516 * If this is a memory resource, unmap it. 517 */ 518 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) && (r->r_end >= 1024 * 1024)) { 519 u_int32_t psize; 520 521 psize = r->r_end - r->r_start; 522 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); 523 } 524 525 return (rman_deactivate_resource(r)); 526} 527 528static int 529nexus_release_resource(device_t bus, device_t child, int type, int rid, 530 struct resource *r) 531{ 532 if (r->r_flags & RF_ACTIVE) { 533 int error = bus_deactivate_resource(child, type, rid, r); 534 if (error) 535 return error; 536 } 537 return (rman_release_resource(r)); 538} 539 540/* 541 * Currently this uses the really grody interface from kern/kern_intr.c 542 * (which really doesn't belong in kern/anything.c). Eventually, all of 543 * the code in kern_intr.c and machdep_intr.c should get moved here, since 544 * this is going to be the official interface. 545 */ 546static int 547nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 548 int flags, void (*ihand)(void *), void *arg, void **cookiep) 549{ 550 driver_t *driver; 551 int error, icflags; 552 int pri; /* interrupt thread priority */ 553 554 /* somebody tried to setup an irq that failed to allocate! */ 555 if (irq == NULL) 556 panic("nexus_setup_intr: NULL irq resource!"); 557 558 *cookiep = 0; 559 if (irq->r_flags & RF_SHAREABLE) 560 icflags = 0; 561 else 562 icflags = INTR_EXCL; 563 564 driver = device_get_driver(child); 565 pri = ithread_priority(flags); 566 if (flags & INTR_FAST) 567 icflags |= INTR_FAST; 568 569 /* 570 * We depend here on rman_activate_resource() being idempotent. 571 */ 572 error = rman_activate_resource(irq); 573 if (error) 574 return (error); 575 576 *cookiep = inthand_add(device_get_nameunit(child), irq->r_start, 577 ihand, arg, pri, icflags); 578 if (*cookiep == NULL) 579 error = EINVAL; /* XXX ??? */ 580 581 return (error); 582} 583 584static int 585nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 586{ 587 return (inthand_remove(ih)); 588} 589 590static int 591nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 592{ 593 struct nexus_device *ndev = DEVTONX(child); 594 struct resource_list *rl = &ndev->nx_resources; 595 596 /* XXX this should return a success/failure indicator */ 597 resource_list_add(rl, type, rid, start, start + count - 1, count); 598 return(0); 599} 600 601static int 602nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 603{ 604 struct nexus_device *ndev = DEVTONX(child); 605 struct resource_list *rl = &ndev->nx_resources; 606 struct resource_list_entry *rle; 607 608 rle = resource_list_find(rl, type, rid); 609 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", 610 type, rid, startp, countp, rle); 611 if (!rle) 612 return(ENOENT); 613 if (startp) 614 *startp = rle->start; 615 if (countp) 616 *countp = rle->count; 617 return(0); 618} 619 620static void 621nexus_delete_resource(device_t dev, device_t child, int type, int rid) 622{ 623 struct nexus_device *ndev = DEVTONX(child); 624 struct resource_list *rl = &ndev->nx_resources; 625 626 resource_list_delete(rl, type, rid); 627} 628 629/* 630 * Placeholder which claims PnP 'devices' which describe system 631 * resources. 632 */ 633static struct isa_pnp_id sysresource_ids[] = { 634 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 635 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 636 { 0 } 637}; 638 639static int 640sysresource_probe(device_t dev) 641{ 642 int result; 643 644 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 645 device_quiet(dev); 646 } 647 return(result); 648} 649 650static int 651sysresource_attach(device_t dev) 652{ 653 return(0); 654} 655 656static device_method_t sysresource_methods[] = { 657 /* Device interface */ 658 DEVMETHOD(device_probe, sysresource_probe), 659 DEVMETHOD(device_attach, sysresource_attach), 660 DEVMETHOD(device_detach, bus_generic_detach), 661 DEVMETHOD(device_shutdown, bus_generic_shutdown), 662 DEVMETHOD(device_suspend, bus_generic_suspend), 663 DEVMETHOD(device_resume, bus_generic_resume), 664 { 0, 0 } 665}; 666 667static driver_t sysresource_driver = { 668 "sysresource", 669 sysresource_methods, 670 1, /* no softc */ 671}; 672 673static devclass_t sysresource_devclass; 674 675DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 676