bios.c revision 115683
1/*- 2 * Copyright (c) 1997 Michael Smith 3 * Copyright (c) 1998 Jonathan Lemon 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/amd64/amd64/bios.c 115683 2003-06-02 06:43:15Z obrien $"); 31 32/* 33 * Code for dealing with the BIOS in x86 PC systems. 34 */ 35 36#include "opt_isa.h" 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/kernel.h> 41#include <sys/malloc.h> 42#include <sys/bus.h> 43#include <sys/pcpu.h> 44#include <vm/vm.h> 45#include <vm/pmap.h> 46#include <machine/md_var.h> 47#include <machine/segments.h> 48#include <machine/stdarg.h> 49#include <machine/vmparam.h> 50#include <machine/pc/bios.h> 51#ifdef DEV_ISA 52#include <isa/isavar.h> 53#include <isa/pnpreg.h> 54#include <isa/pnpvar.h> 55#endif 56 57#define BIOS_START 0xe0000 58#define BIOS_SIZE 0x20000 59 60/* exported lookup results */ 61struct bios32_SDentry PCIbios; 62struct PnPBIOS_table *PnPBIOStable; 63 64static u_int bios32_SDCI; 65 66/* start fairly early */ 67static void bios32_init(void *junk); 68SYSINIT(bios32, SI_SUB_CPU, SI_ORDER_ANY, bios32_init, NULL); 69 70/* 71 * bios32_init 72 * 73 * Locate various bios32 entities. 74 */ 75static void 76bios32_init(void *junk) 77{ 78 u_long sigaddr; 79 struct bios32_SDheader *sdh; 80 struct PnPBIOS_table *pt; 81 u_int8_t ck, *cv; 82 int i; 83 char *p; 84 85 /* 86 * BIOS32 Service Directory, PCI BIOS 87 */ 88 89 /* look for the signature */ 90 if ((sigaddr = bios_sigsearch(0, "_32_", 4, 16, 0)) != 0) { 91 92 /* get a virtual pointer to the structure */ 93 sdh = (struct bios32_SDheader *)(uintptr_t)BIOS_PADDRTOVADDR(sigaddr); 94 for (cv = (u_int8_t *)sdh, ck = 0, i = 0; i < (sdh->len * 16); i++) { 95 ck += cv[i]; 96 } 97 /* If checksum is OK, enable use of the entrypoint */ 98 if ((ck == 0) && (BIOS_START <= sdh->entry ) && 99 (sdh->entry < (BIOS_START + BIOS_SIZE))) { 100 bios32_SDCI = BIOS_PADDRTOVADDR(sdh->entry); 101 if (bootverbose) { 102 printf("bios32: Found BIOS32 Service Directory header at %p\n", sdh); 103 printf("bios32: Entry = 0x%x (%x) Rev = %d Len = %d\n", 104 sdh->entry, bios32_SDCI, sdh->revision, sdh->len); 105 } 106 107 /* Allow user override of PCI BIOS search */ 108 if (((p = getenv("machdep.bios.pci")) == NULL) || strcmp(p, "disable")) { 109 110 /* See if there's a PCI BIOS entrypoint here */ 111 PCIbios.ident.id = 0x49435024; /* PCI systems should have this */ 112 if (!bios32_SDlookup(&PCIbios) && bootverbose) 113 printf("pcibios: PCI BIOS entry at 0x%x+0x%x\n", PCIbios.base, PCIbios.entry); 114 } 115 if (p != NULL) 116 freeenv(p); 117 } else { 118 printf("bios32: Bad BIOS32 Service Directory\n"); 119 } 120 } 121 122 /* 123 * PnP BIOS 124 * 125 * Allow user override of PnP BIOS search 126 */ 127 if ((((p = getenv("machdep.bios.pnp")) == NULL) || strcmp(p, "disable")) && 128 ((sigaddr = bios_sigsearch(0, "$PnP", 4, 16, 0)) != 0)) { 129 130 /* get a virtual pointer to the structure */ 131 pt = (struct PnPBIOS_table *)(uintptr_t)BIOS_PADDRTOVADDR(sigaddr); 132 for (cv = (u_int8_t *)pt, ck = 0, i = 0; i < pt->len; i++) { 133 ck += cv[i]; 134 } 135 /* If checksum is OK, enable use of the entrypoint */ 136 if (ck == 0) { 137 PnPBIOStable = pt; 138 if (bootverbose) { 139 printf("pnpbios: Found PnP BIOS data at %p\n", pt); 140 printf("pnpbios: Entry = %x:%x Rev = %d.%d\n", 141 pt->pmentrybase, pt->pmentryoffset, pt->version >> 4, pt->version & 0xf); 142 if ((pt->control & 0x3) == 0x01) 143 printf("pnpbios: Event flag at %x\n", pt->evflagaddr); 144 if (pt->oemdevid != 0) 145 printf("pnpbios: OEM ID %x\n", pt->oemdevid); 146 147 } 148 } else { 149 printf("pnpbios: Bad PnP BIOS data checksum\n"); 150 } 151 } 152 if (p != NULL) 153 freeenv(p); 154 if (bootverbose) { 155 /* look for other know signatures */ 156 printf("Other BIOS signatures found:\n"); 157 } 158} 159 160/* 161 * bios32_SDlookup 162 * 163 * Query the BIOS32 Service Directory for the service named in (ent), 164 * returns nonzero if the lookup fails. The caller must fill in 165 * (ent->ident), the remainder are populated on a successful lookup. 166 */ 167int 168bios32_SDlookup(struct bios32_SDentry *ent) 169{ 170 struct bios_regs args; 171 172 if (bios32_SDCI == 0) 173 return (1); 174 175 args.eax = ent->ident.id; /* set up arguments */ 176 args.ebx = args.ecx = args.edx = 0; 177 bios32(&args, bios32_SDCI, GSEL(GCODE_SEL, SEL_KPL)); 178 if ((args.eax & 0xff) == 0) { /* success? */ 179 ent->base = args.ebx; 180 ent->len = args.ecx; 181 ent->entry = args.edx; 182 ent->ventry = BIOS_PADDRTOVADDR(ent->base + ent->entry); 183 return (0); /* all OK */ 184 } 185 return (1); /* failed */ 186} 187 188 189/* 190 * bios_sigsearch 191 * 192 * Search some or all of the BIOS region for a signature string. 193 * 194 * (start) Optional offset returned from this function 195 * (for searching for multiple matches), or NULL 196 * to start the search from the base of the BIOS. 197 * Note that this will be a _physical_ address in 198 * the range 0xe0000 - 0xfffff. 199 * (sig) is a pointer to the byte(s) of the signature. 200 * (siglen) number of bytes in the signature. 201 * (paralen) signature paragraph (alignment) size. 202 * (sigofs) offset of the signature within the paragraph. 203 * 204 * Returns the _physical_ address of the found signature, 0 if the 205 * signature was not found. 206 */ 207 208u_int32_t 209bios_sigsearch(u_int32_t start, u_char *sig, int siglen, int paralen, int sigofs) 210{ 211 u_char *sp, *end; 212 213 /* compute the starting address */ 214 if ((start >= BIOS_START) && (start <= (BIOS_START + BIOS_SIZE))) { 215 sp = (char *)BIOS_PADDRTOVADDR(start); 216 } else if (start == 0) { 217 sp = (char *)BIOS_PADDRTOVADDR(BIOS_START); 218 } else { 219 return 0; /* bogus start address */ 220 } 221 222 /* compute the end address */ 223 end = (u_char *)BIOS_PADDRTOVADDR(BIOS_START + BIOS_SIZE); 224 225 /* loop searching */ 226 while ((sp + sigofs + siglen) < end) { 227 228 /* compare here */ 229 if (!bcmp(sp + sigofs, sig, siglen)) { 230 /* convert back to physical address */ 231 return((u_int32_t)BIOS_VADDRTOPADDR(sp)); 232 } 233 sp += paralen; 234 } 235 return(0); 236} 237 238/* 239 * do not staticize, used by bioscall.s 240 */ 241union { 242 struct { 243 u_short offset; 244 u_short segment; 245 } vec16; 246 struct { 247 u_int offset; 248 u_short segment; 249 } vec32; 250} bioscall_vector; /* bios jump vector */ 251 252void 253set_bios_selectors(struct bios_segments *seg, int flags) 254{ 255 struct soft_segment_descriptor ssd = { 256 0, /* segment base address (overwritten) */ 257 0, /* length (overwritten) */ 258 SDT_MEMERA, /* segment type (overwritten) */ 259 0, /* priority level */ 260 1, /* descriptor present */ 261 0, 0, 262 1, /* descriptor size (overwritten) */ 263 0 /* granularity == byte units */ 264 }; 265 union descriptor *p_gdt; 266 267#ifdef SMP 268 p_gdt = &gdt[PCPU_GET(cpuid) * NGDT]; 269#else 270 p_gdt = gdt; 271#endif 272 273 ssd.ssd_base = seg->code32.base; 274 ssd.ssd_limit = seg->code32.limit; 275 ssdtosd(&ssd, &p_gdt[GBIOSCODE32_SEL].sd); 276 277 ssd.ssd_def32 = 0; 278 if (flags & BIOSCODE_FLAG) { 279 ssd.ssd_base = seg->code16.base; 280 ssd.ssd_limit = seg->code16.limit; 281 ssdtosd(&ssd, &p_gdt[GBIOSCODE16_SEL].sd); 282 } 283 284 ssd.ssd_type = SDT_MEMRWA; 285 if (flags & BIOSDATA_FLAG) { 286 ssd.ssd_base = seg->data.base; 287 ssd.ssd_limit = seg->data.limit; 288 ssdtosd(&ssd, &p_gdt[GBIOSDATA_SEL].sd); 289 } 290 291 if (flags & BIOSUTIL_FLAG) { 292 ssd.ssd_base = seg->util.base; 293 ssd.ssd_limit = seg->util.limit; 294 ssdtosd(&ssd, &p_gdt[GBIOSUTIL_SEL].sd); 295 } 296 297 if (flags & BIOSARGS_FLAG) { 298 ssd.ssd_base = seg->args.base; 299 ssd.ssd_limit = seg->args.limit; 300 ssdtosd(&ssd, &p_gdt[GBIOSARGS_SEL].sd); 301 } 302} 303 304extern int vm86pa; 305extern void bios16_jmp(void); 306 307/* 308 * this routine is really greedy with selectors, and uses 5: 309 * 310 * 32-bit code selector: to return to kernel 311 * 16-bit code selector: for running code 312 * data selector: for 16-bit data 313 * util selector: extra utility selector 314 * args selector: to handle pointers 315 * 316 * the util selector is set from the util16 entry in bios16_args, if a 317 * "U" specifier is seen. 318 * 319 * See <machine/pc/bios.h> for description of format specifiers 320 */ 321int 322bios16(struct bios_args *args, char *fmt, ...) 323{ 324 char *p, *stack, *stack_top; 325 va_list ap; 326 int flags = BIOSCODE_FLAG | BIOSDATA_FLAG; 327 u_int i, arg_start, arg_end; 328 pt_entry_t *pte; 329 pd_entry_t *ptd; 330 331 arg_start = 0xffffffff; 332 arg_end = 0; 333 334 /* 335 * Some BIOS entrypoints attempt to copy the largest-case 336 * argument frame (in order to generalise handling for 337 * different entry types). If our argument frame is 338 * smaller than this, the BIOS will reach off the top of 339 * our constructed stack segment. Pad the top of the stack 340 * with some garbage to avoid this. 341 */ 342 stack = (caddr_t)PAGE_SIZE - 32; 343 344 va_start(ap, fmt); 345 for (p = fmt; p && *p; p++) { 346 switch (*p) { 347 case 'p': /* 32-bit pointer */ 348 i = va_arg(ap, u_int); 349 arg_start = min(arg_start, i); 350 arg_end = max(arg_end, i); 351 flags |= BIOSARGS_FLAG; 352 stack -= 4; 353 break; 354 355 case 'i': /* 32-bit integer */ 356 i = va_arg(ap, u_int); 357 stack -= 4; 358 break; 359 360 case 'U': /* 16-bit selector */ 361 flags |= BIOSUTIL_FLAG; 362 /* FALLTHROUGH */ 363 case 'D': /* 16-bit selector */ 364 case 'C': /* 16-bit selector */ 365 stack -= 2; 366 break; 367 368 case 's': /* 16-bit integer passed as an int */ 369 i = va_arg(ap, int); 370 stack -= 2; 371 break; 372 373 default: 374 return (EINVAL); 375 } 376 } 377 378 if (flags & BIOSARGS_FLAG) { 379 if (arg_end - arg_start > ctob(16)) 380 return (EACCES); 381 args->seg.args.base = arg_start; 382 args->seg.args.limit = 0xffff; 383 } 384 385 args->seg.code32.base = (u_int)&bios16_jmp & PG_FRAME; 386 args->seg.code32.limit = 0xffff; 387 388 ptd = (pd_entry_t *)rcr3(); 389#ifdef PAE 390 if (ptd == IdlePDPT) 391#else 392 if (ptd == IdlePTD) 393#endif 394 { 395 /* 396 * no page table, so create one and install it. 397 */ 398 pte = (pt_entry_t *)malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 399 ptd = (pd_entry_t *)((u_int)IdlePTD + KERNBASE); 400 *ptd = vtophys(pte) | PG_RW | PG_V; 401 } else { 402 /* 403 * this is a user-level page table 404 */ 405 pte = PTmap; 406 } 407 /* 408 * install pointer to page 0. we don't need to flush the tlb, 409 * since there should not be a previous mapping for page 0. 410 */ 411 *pte = (vm86pa - PAGE_SIZE) | PG_RW | PG_V; 412 413 stack_top = stack; 414 va_start(ap, fmt); 415 for (p = fmt; p && *p; p++) { 416 switch (*p) { 417 case 'p': /* 32-bit pointer */ 418 i = va_arg(ap, u_int); 419 *(u_int *)stack = (i - arg_start) | 420 (GSEL(GBIOSARGS_SEL, SEL_KPL) << 16); 421 stack += 4; 422 break; 423 424 case 'i': /* 32-bit integer */ 425 i = va_arg(ap, u_int); 426 *(u_int *)stack = i; 427 stack += 4; 428 break; 429 430 case 'U': /* 16-bit selector */ 431 *(u_short *)stack = GSEL(GBIOSUTIL_SEL, SEL_KPL); 432 stack += 2; 433 break; 434 435 case 'D': /* 16-bit selector */ 436 *(u_short *)stack = GSEL(GBIOSDATA_SEL, SEL_KPL); 437 stack += 2; 438 break; 439 440 case 'C': /* 16-bit selector */ 441 *(u_short *)stack = GSEL(GBIOSCODE16_SEL, SEL_KPL); 442 stack += 2; 443 break; 444 445 case 's': /* 16-bit integer passed as an int */ 446 i = va_arg(ap, int); 447 *(u_short *)stack = i; 448 stack += 2; 449 break; 450 451 default: 452 return (EINVAL); 453 } 454 } 455 456 set_bios_selectors(&args->seg, flags); 457 bioscall_vector.vec16.offset = (u_short)args->entry; 458 bioscall_vector.vec16.segment = GSEL(GBIOSCODE16_SEL, SEL_KPL); 459 460 i = bios16_call(&args->r, stack_top); 461 462 if (pte == PTmap) { 463 *pte = 0; /* remove entry */ 464 } else { 465 *ptd = 0; /* remove page table */ 466 free(pte, M_TEMP); /* ... and free it */ 467 } 468 469 /* 470 * XXX only needs to be invlpg(0) but that doesn't work on the 386 471 */ 472 pmap_invalidate_all(kernel_pmap); 473 474 return (i); 475} 476 477#ifdef DEV_ISA 478/* 479 * PnP BIOS interface; enumerate devices only known to the system 480 * BIOS and save information about them for later use. 481 */ 482 483struct pnp_sysdev 484{ 485 u_int16_t size; 486 u_int8_t handle; 487 u_int32_t devid; 488 u_int8_t type[3]; 489 u_int16_t attrib; 490#define PNPATTR_NODISABLE (1<<0) /* can't be disabled */ 491#define PNPATTR_NOCONFIG (1<<1) /* can't be configured */ 492#define PNPATTR_OUTPUT (1<<2) /* can be primary output */ 493#define PNPATTR_INPUT (1<<3) /* can be primary input */ 494#define PNPATTR_BOOTABLE (1<<4) /* can be booted from */ 495#define PNPATTR_DOCK (1<<5) /* is a docking station */ 496#define PNPATTR_REMOVEABLE (1<<6) /* device is removeable */ 497#define PNPATTR_CONFIG_STATIC (0) 498#define PNPATTR_CONFIG_DYNAMIC (1) 499#define PNPATTR_CONFIG_DYNONLY (3) 500#define PNPATTR_CONFIG(a) (((a) >> 7) & 0x3) 501 /* device-specific data comes here */ 502 u_int8_t devdata[0]; 503} __packed; 504 505/* We have to cluster arguments within a 64k range for the bios16 call */ 506struct pnp_sysdevargs 507{ 508 u_int16_t next; 509 struct pnp_sysdev node; 510}; 511 512/* 513 * This function is called after the bus has assigned resource 514 * locations for a logical device. 515 */ 516static void 517pnpbios_set_config(void *arg, struct isa_config *config, int enable) 518{ 519} 520 521/* 522 * Quiz the PnP BIOS, build a list of PNP IDs and resource data. 523 */ 524static void 525pnpbios_identify(driver_t *driver, device_t parent) 526{ 527 struct PnPBIOS_table *pt = PnPBIOStable; 528 struct bios_args args; 529 struct pnp_sysdev *pd; 530 struct pnp_sysdevargs *pda; 531 u_int16_t ndevs, bigdev; 532 int error, currdev; 533 u_int8_t *devnodebuf, tag; 534 u_int32_t *devid, *compid; 535 int idx, left; 536 device_t dev; 537 538 /* no PnP BIOS information */ 539 if (pt == NULL) 540 return; 541 542 /* ACPI already active */ 543 if (devclass_get_softc(devclass_find("ACPI"), 0) != NULL) 544 return; 545 546 /* get count of PnP devices */ 547 bzero(&args, sizeof(args)); 548 args.seg.code16.base = BIOS_PADDRTOVADDR(pt->pmentrybase); 549 args.seg.code16.limit = 0xffff; /* XXX ? */ 550 args.seg.data.base = BIOS_PADDRTOVADDR(pt->pmdataseg); 551 args.seg.data.limit = 0xffff; 552 args.entry = pt->pmentryoffset; 553 554 if ((error = bios16(&args, PNP_COUNT_DEVNODES, &ndevs, &bigdev)) || (args.r.eax & 0xff)) 555 printf("pnpbios: error %d/%x getting device count/size limit\n", error, args.r.eax); 556 ndevs &= 0xff; /* clear high byte garbage */ 557 if (bootverbose) 558 printf("pnpbios: %d devices, largest %d bytes\n", ndevs, bigdev); 559 560 devnodebuf = malloc(bigdev + (sizeof(struct pnp_sysdevargs) - sizeof(struct pnp_sysdev)), 561 M_DEVBUF, M_NOWAIT); 562 pda = (struct pnp_sysdevargs *)devnodebuf; 563 pd = &pda->node; 564 565 for (currdev = 0, left = ndevs; (currdev != 0xff) && (left > 0); left--) { 566 567 bzero(pd, bigdev); 568 pda->next = currdev; 569 /* get current configuration */ 570 if ((error = bios16(&args, PNP_GET_DEVNODE, &pda->next, &pda->node, 1))) { 571 printf("pnpbios: error %d making BIOS16 call\n", error); 572 break; 573 } 574 if ((error = (args.r.eax & 0xff))) { 575 if (bootverbose) 576 printf("pnpbios: %s 0x%x fetching node %d\n", error & 0x80 ? "error" : "warning", error, currdev); 577 if (error & 0x80) 578 break; 579 } 580 currdev = pda->next; 581 if (pd->size < sizeof(struct pnp_sysdev)) { 582 printf("pnpbios: bogus system node data, aborting scan\n"); 583 break; 584 } 585 586 /* 587 * If we are in APIC_IO mode, we should ignore the ISA PIC if it 588 * shows up. Likewise, in !APIC_IO mode, we should ignore the 589 * APIC (less important). 590 * This is significant because the ISA PIC will claim IRQ 2 (which 591 * it uses for chaining), while in APIC mode this is a valid IRQ 592 * available for general use. 593 */ 594#ifdef APIC_IO 595 if (!strcmp(pnp_eisaformat(pd->devid), "PNP0000")) /* ISA PIC */ 596 continue; 597#else 598 if (!strcmp(pnp_eisaformat(pd->devid), "PNP0003")) /* APIC */ 599 continue; 600#endif 601 602 /* Add the device and parse its resources */ 603 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 604 isa_set_vendorid(dev, pd->devid); 605 isa_set_logicalid(dev, pd->devid); 606 /* 607 * It appears that some PnP BIOS doesn't allow us to re-enable 608 * the embedded system device once it is disabled. We shall 609 * mark all system device nodes as "cannot be disabled", regardless 610 * of actual settings in the device attribute byte. 611 * XXX 612 isa_set_configattr(dev, 613 ((pd->attrib & PNPATTR_NODISABLE) ? 0 : ISACFGATTR_CANDISABLE) | 614 ((!(pd->attrib & PNPATTR_NOCONFIG) && 615 PNPATTR_CONFIG(pd->attrib) != PNPATTR_CONFIG_STATIC) 616 ? ISACFGATTR_DYNAMIC : 0)); 617 */ 618 isa_set_configattr(dev, 619 (!(pd->attrib & PNPATTR_NOCONFIG) && 620 PNPATTR_CONFIG(pd->attrib) != PNPATTR_CONFIG_STATIC) 621 ? ISACFGATTR_DYNAMIC : 0); 622 ISA_SET_CONFIG_CALLBACK(parent, dev, pnpbios_set_config, 0); 623 pnp_parse_resources(dev, &pd->devdata[0], 624 pd->size - sizeof(struct pnp_sysdev), 0); 625 if (!device_get_desc(dev)) 626 device_set_desc_copy(dev, pnp_eisaformat(pd->devid)); 627 628 /* Find device IDs */ 629 devid = &pd->devid; 630 compid = NULL; 631 632 /* look for a compatible device ID too */ 633 left = pd->size - sizeof(struct pnp_sysdev); 634 idx = 0; 635 while (idx < left) { 636 tag = pd->devdata[idx++]; 637 if (PNP_RES_TYPE(tag) == 0) { 638 /* Small resource */ 639 switch (PNP_SRES_NUM(tag)) { 640 case PNP_TAG_COMPAT_DEVICE: 641 compid = (u_int32_t *)(pd->devdata + idx); 642 if (bootverbose) 643 printf("pnpbios: node %d compat ID 0x%08x\n", pd->handle, *compid); 644 /* FALLTHROUGH */ 645 case PNP_TAG_END: 646 idx = left; 647 break; 648 default: 649 idx += PNP_SRES_LEN(tag); 650 break; 651 } 652 } else 653 /* Large resource, skip it */ 654 idx += *(u_int16_t *)(pd->devdata + idx) + 2; 655 } 656 if (bootverbose) { 657 printf("pnpbios: handle %d device ID %s (%08x)", 658 pd->handle, pnp_eisaformat(*devid), *devid); 659 if (compid != NULL) 660 printf(" compat ID %s (%08x)", 661 pnp_eisaformat(*compid), *compid); 662 printf("\n"); 663 } 664 } 665} 666 667static device_method_t pnpbios_methods[] = { 668 /* Device interface */ 669 DEVMETHOD(device_identify, pnpbios_identify), 670 671 { 0, 0 } 672}; 673 674static driver_t pnpbios_driver = { 675 "pnpbios", 676 pnpbios_methods, 677 1, /* no softc */ 678}; 679 680static devclass_t pnpbios_devclass; 681 682DRIVER_MODULE(pnpbios, isa, pnpbios_driver, pnpbios_devclass, 0, 0); 683#endif /* DEV_ISA */ 684