isa.c revision 26309
1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 37 * $Id: isa.c,v 1.87 1997/05/29 05:56:12 fsmp Exp $ 38 */ 39 40/* 41 * code to manage AT bus 42 * 43 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44 * Fixed uninitialized variable problem and added code to deal 45 * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46 * mode DMA count compution and reorganized DMA setup code in 47 * isa_dmastart() 48 */ 49 50#include "opt_auto_eoi.h" 51 52#include <sys/param.h> 53#include <sys/systm.h> 54#include <sys/buf.h> 55#include <sys/syslog.h> 56#include <sys/malloc.h> 57#include <machine/ipl.h> 58#include <machine/md_var.h> 59#include <machine/segments.h> 60#if defined(APIC_IO) 61#include <machine/smp.h> 62#include <machine/apic.h> 63#endif /* APIC_IO */ 64#include <vm/vm.h> 65#include <vm/vm_param.h> 66#include <vm/pmap.h> 67#include <i386/isa/isa_device.h> 68#include <i386/isa/isa.h> 69#include <i386/isa/icu.h> 70#include <i386/isa/ic/i8237.h> 71#include "vector.h" 72 73#include <sys/interrupt.h> 74 75#ifdef APIC_IO 76/* 77 * This is to accommodate "mixed-mode" programming for 78 * motherboards that don't connect the 8254 to the IO APIC. 79 */ 80#define AUTO_EOI_1 81#endif 82 83/* 84** Register definitions for DMA controller 1 (channels 0..3): 85*/ 86#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 87#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 88#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 89#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 90 91/* 92** Register definitions for DMA controller 2 (channels 4..7): 93*/ 94#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 95#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 96#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 97#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 98 99u_long *intr_countp[ICU_LEN]; 100inthand2_t *intr_handler[ICU_LEN]; 101u_int intr_mask[ICU_LEN]; 102u_int* intr_mptr[ICU_LEN]; 103int intr_unit[ICU_LEN]; 104 105static inthand_t *fastintr[ICU_LEN] = { 106 &IDTVEC(fastintr0), &IDTVEC(fastintr1), 107 &IDTVEC(fastintr2), &IDTVEC(fastintr3), 108 &IDTVEC(fastintr4), &IDTVEC(fastintr5), 109 &IDTVEC(fastintr6), &IDTVEC(fastintr7), 110 &IDTVEC(fastintr8), &IDTVEC(fastintr9), 111 &IDTVEC(fastintr10), &IDTVEC(fastintr11), 112 &IDTVEC(fastintr12), &IDTVEC(fastintr13), 113 &IDTVEC(fastintr14), &IDTVEC(fastintr15) 114#if defined(APIC_IO) 115 , &IDTVEC(fastintr16), &IDTVEC(fastintr17), 116 &IDTVEC(fastintr18), &IDTVEC(fastintr19), 117 &IDTVEC(fastintr20), &IDTVEC(fastintr21), 118 &IDTVEC(fastintr22), &IDTVEC(fastintr23) 119#endif /* APIC_IO */ 120}; 121 122static inthand_t *slowintr[ICU_LEN] = { 123 &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 124 &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 125 &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 126 &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 127#if defined(APIC_IO) 128 , &IDTVEC(intr16), &IDTVEC(intr17), &IDTVEC(intr18), &IDTVEC(intr19), 129 &IDTVEC(intr20), &IDTVEC(intr21), &IDTVEC(intr22), &IDTVEC(intr23) 130#endif /* APIC_IO */ 131}; 132 133static void config_isadev __P((struct isa_device *isdp, u_int *mp)); 134static void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 135 int reconfig)); 136static void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 137 int item, char const *whatnot, char const *reason, 138 char const *format)); 139static int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 140 u_int checkbits)); 141static int isa_dmarangecheck __P((caddr_t va, u_int length, int chan)); 142static inthand2_t isa_strayintr; 143static void register_imask __P((struct isa_device *dvp, u_int mask)); 144 145/* 146 * print a conflict message 147 */ 148static void 149conflict(dvp, tmpdvp, item, whatnot, reason, format) 150 struct isa_device *dvp; 151 struct isa_device *tmpdvp; 152 int item; 153 char const *whatnot; 154 char const *reason; 155 char const *format; 156{ 157 printf("%s%d not %sed due to %s conflict with %s%d at ", 158 dvp->id_driver->name, dvp->id_unit, whatnot, reason, 159 tmpdvp->id_driver->name, tmpdvp->id_unit); 160 printf(format, item); 161 printf("\n"); 162} 163 164/* 165 * Check to see if things are already in use, like IRQ's, I/O addresses 166 * and Memory addresses. 167 */ 168static int 169haveseen(dvp, tmpdvp, checkbits) 170 struct isa_device *dvp; 171 struct isa_device *tmpdvp; 172 u_int checkbits; 173{ 174 /* 175 * Only check against devices that have already been found and are not 176 * unilaterally allowed to conflict anyway. 177 */ 178 if (tmpdvp->id_alive && !dvp->id_conflicts) { 179 char const *whatnot; 180 181 whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 182 /* 183 * Check for I/O address conflict. We can only check the 184 * starting address of the device against the range of the 185 * device that has already been probed since we do not 186 * know how many I/O addresses this device uses. 187 */ 188 if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 189 if ((dvp->id_iobase >= tmpdvp->id_iobase) && 190 (dvp->id_iobase <= 191 (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 192 conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 193 "I/O address", "0x%x"); 194 return 1; 195 } 196 } 197 /* 198 * Check for Memory address conflict. We can check for 199 * range overlap, but it will not catch all cases since the 200 * driver may adjust the msize paramater during probe, for 201 * now we just check that the starting address does not 202 * fall within any allocated region. 203 * XXX could add a second check after the probe for overlap, 204 * since at that time we would know the full range. 205 * XXX KERNBASE is a hack, we should have vaddr in the table! 206 */ 207 if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 208 if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 209 (KERNBASE + dvp->id_maddr <= 210 (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 211 conflict(dvp, tmpdvp, (int)dvp->id_maddr, 212 whatnot, "maddr", "0x%x"); 213 return 1; 214 } 215 } 216 /* 217 * Check for IRQ conflicts. 218 */ 219 if (checkbits & CC_IRQ && tmpdvp->id_irq) { 220 if (tmpdvp->id_irq == dvp->id_irq) { 221 conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 222 whatnot, "irq", "%d"); 223 return 1; 224 } 225 } 226 /* 227 * Check for DRQ conflicts. 228 */ 229 if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 230 if (tmpdvp->id_drq == dvp->id_drq) { 231 conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 232 "drq", "%d"); 233 return 1; 234 } 235 } 236 } 237 return 0; 238} 239 240#ifdef RESOURCE_CHECK 241#include <sys/drvresource.h> 242 243static int 244checkone (struct isa_device *dvp, int type, addr_t low, addr_t high, 245 char *resname, char *resfmt, int attaching) 246{ 247 int result = 0; 248 if (bootverbose) { 249 if (low == high) 250 printf("\tcheck %s: 0x%x\n", resname, low); 251 else 252 printf("\tcheck %s: 0x%x to 0x%x\n", 253 resname, low, high); 254 } 255 if (resource_check(type, RESF_NONE, low, high) != NULL) { 256 char *whatnot = attaching ? "attach" : "prob"; 257 static struct isa_device dummydev; 258 static struct isa_driver dummydrv; 259 struct isa_device *tmpdvp = &dummydev; 260 261 dummydev.id_driver = &dummydrv; 262 dummydev.id_unit = 0; 263 dummydrv.name = "pci"; 264 conflict(dvp, tmpdvp, low, whatnot, resname, resfmt); 265 result = 1; 266 } else if (attaching) { 267 if (low == high) 268 printf("\tregister %s: 0x%x\n", resname, low); 269 else 270 printf("\tregister %s: 0x%x to 0x%x\n", 271 resname, low, high); 272 resource_claim(dvp, type, RESF_NONE, low, high); 273 } 274 return (result); 275} 276 277static int 278check_pciconflict(struct isa_device *dvp, int checkbits) 279{ 280 int result = 0; 281 int attaching = (checkbits & CC_ATTACH) != 0; 282 283 if (checkbits & CC_MEMADDR) { 284 long maddr = dvp->id_maddr; 285 long msize = dvp->id_msize; 286 if (msize > 0) { 287 if (checkone(dvp, REST_MEM, maddr, maddr + msize - 1, 288 "maddr", "0x%x", attaching) != 0) { 289 result = 1; 290 attaching = 0; 291 } 292 } 293 } 294 if (checkbits & CC_IOADDR) { 295 unsigned iobase = dvp->id_iobase; 296 unsigned iosize = dvp->id_alive; 297 if (iosize == -1) 298 iosize = 1; /* XXX can't do much about this ... */ 299 if (iosize > 0) { 300 if (checkone(dvp, REST_PORT, iobase, iobase + iosize -1, 301 "I/O address", "0x%x", attaching) != 0) { 302 result = 1; 303 attaching = 0; 304 } 305 } 306 } 307 if (checkbits & CC_IRQ) { 308 int irq = ffs(dvp->id_irq) - 1; 309 if (irq >= 0) { 310 if (checkone(dvp, REST_INT, irq, irq, 311 "irq", "%d", attaching) != 0) { 312 result = 1; 313 attaching = 0; 314 } 315 } 316 } 317 if (checkbits & CC_DRQ) { 318 int drq = dvp->id_drq; 319 if (drq >= 0) { 320 if (checkone(dvp, REST_DMA, drq, drq, 321 "drq", "%d", attaching) != 0) { 322 result = 1; 323 attaching = 0; 324 } 325 } 326 } 327 if (result != 0) 328 resource_free (dvp); 329 return (result); 330} 331#endif /* RESOURCE_CHECK */ 332 333/* 334 * Search through all the isa_devtab_* tables looking for anything that 335 * conflicts with the current device. 336 */ 337int 338haveseen_isadev(dvp, checkbits) 339 struct isa_device *dvp; 340 u_int checkbits; 341{ 342 struct isa_device *tmpdvp; 343 int status = 0; 344 345 for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 346 status |= haveseen(dvp, tmpdvp, checkbits); 347 if (status) 348 return status; 349 } 350 for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 351 status |= haveseen(dvp, tmpdvp, checkbits); 352 if (status) 353 return status; 354 } 355 for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 356 status |= haveseen(dvp, tmpdvp, checkbits); 357 if (status) 358 return status; 359 } 360 for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 361 status |= haveseen(dvp, tmpdvp, checkbits); 362 if (status) 363 return status; 364 } 365#ifdef RESOURCE_CHECK 366 if (!dvp->id_conflicts) { 367 status = check_pciconflict(dvp, checkbits); 368 } else if (bootverbose) 369 printf("\tnot checking for resource conflicts ...\n"); 370 } 371#endif /* RESOURCE_CHECK */ 372 return(status); 373} 374 375/* 376 * Configure all ISA devices 377 */ 378void 379isa_configure() { 380 struct isa_device *dvp; 381 382 splhigh(); 383 printf("Probing for devices on the ISA bus:\n"); 384 /* First probe all the sensitive probes */ 385 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 386 if (dvp->id_driver->sensitive_hw) 387 config_isadev(dvp, &tty_imask); 388 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 389 if (dvp->id_driver->sensitive_hw) 390 config_isadev(dvp, &bio_imask); 391 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 392 if (dvp->id_driver->sensitive_hw) 393 config_isadev(dvp, &net_imask); 394 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 395 if (dvp->id_driver->sensitive_hw) 396 config_isadev(dvp, (u_int *)NULL); 397 398 /* Then all the bad ones */ 399 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 400 if (!dvp->id_driver->sensitive_hw) 401 config_isadev(dvp, &tty_imask); 402 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 403 if (!dvp->id_driver->sensitive_hw) 404 config_isadev(dvp, &bio_imask); 405 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 406 if (!dvp->id_driver->sensitive_hw) 407 config_isadev(dvp, &net_imask); 408 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 409 if (!dvp->id_driver->sensitive_hw) 410 config_isadev(dvp, (u_int *)NULL); 411 412 bio_imask |= SWI_CLOCK_MASK; 413 net_imask |= SWI_NET_MASK; 414 tty_imask |= SWI_TTY_MASK; 415 416/* 417 * XXX we should really add the tty device to net_imask when the line is 418 * switched to SLIPDISC, and then remove it when it is switched away from 419 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 420 * of them is running slip. 421 * 422 * XXX actually, blocking all ttys during a splimp doesn't matter so much 423 * with sio because the serial interrupt layer doesn't use tty_imask. Only 424 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 425 * during spltty. 426 */ 427#include "sl.h" 428#if NSL > 0 429 net_imask |= tty_imask; 430 tty_imask = net_imask; 431#endif 432 433 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 434 435 if (bootverbose) 436 printf("imasks: bio %x, tty %x, net %x\n", 437 bio_imask, tty_imask, net_imask); 438 439 /* 440 * Finish initializing intr_mask[]. Note that the partly 441 * constructed masks aren't actually used since we're at splhigh. 442 * For fully dynamic initialization, register_intr() and 443 * icu_unset() will have to adjust the masks for _all_ 444 * interrupts and for tty_imask, etc. 445 */ 446 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 447 register_imask(dvp, tty_imask); 448 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 449 register_imask(dvp, bio_imask); 450 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 451 register_imask(dvp, net_imask); 452 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 453 register_imask(dvp, SWI_CLOCK_MASK); 454 spl0(); 455} 456 457/* 458 * Configure an ISA device. 459 */ 460 461 462static void 463config_isadev(isdp, mp) 464 struct isa_device *isdp; 465 u_int *mp; 466{ 467 config_isadev_c(isdp, mp, 0); 468} 469 470void 471reconfig_isadev(isdp, mp) 472 struct isa_device *isdp; 473 u_int *mp; 474{ 475 config_isadev_c(isdp, mp, 1); 476} 477 478static void 479config_isadev_c(isdp, mp, reconfig) 480 struct isa_device *isdp; 481 u_int *mp; 482 int reconfig; 483{ 484 u_int checkbits; 485 int id_alive; 486 int last_alive; 487 struct isa_driver *dp = isdp->id_driver; 488 489 if (!isdp->id_enabled) { 490 printf("%s%d: disabled, not probed.\n", 491 dp->name, isdp->id_unit); 492 return; 493 } 494 checkbits = CC_DRQ | CC_IOADDR | CC_MEMADDR; 495 if (!reconfig && haveseen_isadev(isdp, checkbits)) 496 return; 497 if (!reconfig && isdp->id_maddr) { 498 isdp->id_maddr -= ISA_HOLE_START; 499 isdp->id_maddr += atdevbase; 500 } 501 if (reconfig) { 502 last_alive = isdp->id_alive; 503 isdp->id_reconfig = 1; 504 } 505 else { 506 last_alive = 0; 507 isdp->id_reconfig = 0; 508 } 509 id_alive = (*dp->probe)(isdp); 510 if (id_alive) { 511 /* 512 * Only print the I/O address range if id_alive != -1 513 * Right now this is a temporary fix just for the new 514 * NPX code so that if it finds a 486 that can use trap 515 * 16 it will not report I/O addresses. 516 * Rod Grimes 04/26/94 517 */ 518 if (!isdp->id_reconfig) { 519 printf("%s%d", dp->name, isdp->id_unit); 520 if (id_alive != -1) { 521 if (isdp->id_iobase == -1) 522 printf(" at ?"); 523 else { 524 printf(" at 0x%x", isdp->id_iobase); 525 if (isdp->id_iobase + id_alive - 1 != 526 isdp->id_iobase) { 527 printf("-0x%x", 528 isdp->id_iobase + id_alive - 1); 529 } 530 } 531 } 532 if (isdp->id_irq) 533 printf(" irq %d", ffs(isdp->id_irq) - 1); 534 if (isdp->id_drq != -1) 535 printf(" drq %d", isdp->id_drq); 536 if (isdp->id_maddr) 537 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 538 if (isdp->id_msize) 539 printf(" msize %d", isdp->id_msize); 540 if (isdp->id_flags) 541 printf(" flags 0x%x", isdp->id_flags); 542 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 543 printf(" on motherboard"); 544 } else if (isdp->id_iobase >= 0x1000 && 545 !(isdp->id_iobase & 0x300)) { 546 printf (" on eisa slot %d", 547 isdp->id_iobase >> 12); 548 } else { 549 printf (" on isa"); 550 } 551 printf("\n"); 552 /* 553 * Check for conflicts again. The driver may have 554 * changed *dvp. We should weaken the early check 555 * since the driver may have been able to change 556 * *dvp to avoid conflicts if given a chance. We 557 * already skip the early check for IRQs and force 558 * a check for IRQs in the next group of checks. 559 */ 560 checkbits |= CC_IRQ; 561 if (haveseen_isadev(isdp, checkbits)) { 562 return; 563 } 564 isdp->id_alive = id_alive; 565 } 566 (*dp->attach)(isdp); 567 if (isdp->id_irq) { 568#if defined(APIC_IO) 569 /* 570 * Some motherboards use upper IRQs for traditional 571 * ISA INTerrupt sources. In particular we have 572 * seen the secondary IDE connected to IRQ20. 573 * This code detects and fixes this situation. 574 */ 575 u_int apic_mask; 576 int rirq; 577 578 apic_mask = get_isa_apic_mask(isdp->id_irq); 579 if (apic_mask != isdp->id_irq) { 580 rirq = ffs(isdp->id_irq) - 1; 581 isdp->id_irq = apic_mask; 582 undirect_isa_irq(rirq); /* free for ISA */ 583 } 584#endif /* APIC_IO */ 585 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 586 isdp->id_ri_flags, isdp->id_intr, 587 mp, isdp->id_unit); 588 } 589 } else { 590 if (isdp->id_reconfig) { 591 (*dp->attach)(isdp); /* reconfiguration attach */ 592 } 593 if (!last_alive) { 594 if (!isdp->id_reconfig) { 595 printf("%s%d not found", 596 dp->name, isdp->id_unit); 597 if (isdp->id_iobase != -1) 598 printf(" at 0x%x", isdp->id_iobase); 599 printf("\n"); 600 } 601 } 602 else { 603#if 0 604 /* This code has not been tested.... */ 605 if (isdp->id_irq) { 606 icu_unset(ffs(isdp->id_irq) - 1, 607 isdp->id_intr); 608 if (mp) 609 INTRUNMASK(*mp, isdp->id_irq); 610 } 611#else 612 printf ("icu_unset() not supported here ...\n"); 613#endif 614 } 615 } 616} 617 618/* 619 * Fill in default interrupt table (in case of spuruious interrupt 620 * during configuration of kernel, setup interrupt control unit 621 */ 622void 623isa_defaultirq() 624{ 625 int i; 626 627 /* icu vectors */ 628 for (i = 0; i < ICU_LEN; i++) 629 icu_unset(i, (inthand2_t *)NULL); 630 631 /* initialize 8259's */ 632 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 633 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 634 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 635#ifdef AUTO_EOI_1 636 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 637#else 638 outb(IO_ICU1+1, 1); /* 8086 mode */ 639#endif 640 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 641 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 642 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 643 644 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 645 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 646 outb(IO_ICU2+1,2); /* my slave id is 2 */ 647#ifdef AUTO_EOI_2 648 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 649#else 650 outb(IO_ICU2+1,1); /* 8086 mode */ 651#endif 652 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 653 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 654} 655 656static caddr_t dma_bouncebuf[8]; 657static u_int dma_bouncebufsize[8]; 658static u_int8_t dma_bounced = 0; 659static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 660static u_int8_t dma_inuse = 0; /* User for acquire/release */ 661 662#define VALID_DMA_MASK (7) 663 664/* high byte of address is stored in this port for i-th dma channel */ 665static int dmapageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 666 667/* 668 * Setup a DMA channel's bounce buffer. 669 */ 670void 671isa_dmainit(chan, bouncebufsize) 672 int chan; 673 u_int bouncebufsize; 674{ 675 void *buf; 676 677#ifdef DIAGNOSTIC 678 if (chan & ~VALID_DMA_MASK) 679 panic("isa_dmainit: channel out of range"); 680 681 if (dma_bouncebuf[chan] != NULL) 682 panic("isa_dmainit: impossible request"); 683#endif 684 685 dma_bouncebufsize[chan] = bouncebufsize; 686 687 /* Try malloc() first. It works better if it works. */ 688 buf = malloc(bouncebufsize, M_DEVBUF, M_NOWAIT); 689 if (buf != NULL) { 690 if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 691 dma_bouncebuf[chan] = buf; 692 return; 693 } 694 free(buf, M_DEVBUF); 695 } 696 buf = contigmalloc(bouncebufsize, M_DEVBUF, M_NOWAIT, 0ul, 0xfffffful, 697 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 698 if (buf == NULL) 699 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 700 else 701 dma_bouncebuf[chan] = buf; 702} 703 704/* 705 * Register a DMA channel's usage. Usually called from a device driver 706 * in open() or during it's initialization. 707 */ 708int 709isa_dma_acquire(chan) 710 int chan; 711{ 712#ifdef DIAGNOSTIC 713 if (chan & ~VALID_DMA_MASK) 714 panic("isa_dma_acquire: channel out of range"); 715#endif 716 717 if (dma_inuse & (1 << chan)) { 718 printf("isa_dma_acquire: channel %d already in use\n", chan); 719 return (EBUSY); 720 } 721 dma_inuse |= (1 << chan); 722 723 return (0); 724} 725 726/* 727 * Unregister a DMA channel's usage. Usually called from a device driver 728 * during close() or during it's shutdown. 729 */ 730void 731isa_dma_release(chan) 732 int chan; 733{ 734#ifdef DIAGNOSTIC 735 if (chan & ~VALID_DMA_MASK) 736 panic("isa_dma_release: channel out of range"); 737 738 if (dma_inuse & (1 << chan) == 0) 739 printf("isa_dma_release: channel %d not in use\n", chan); 740#endif 741 742 if (dma_busy & (1 << chan)) { 743 dma_busy &= ~(1 << chan); 744 /* 745 * XXX We should also do "dma_bounced &= (1 << chan);" 746 * because we are acting on behalf of isa_dmadone() which 747 * was not called to end the last DMA operation. This does 748 * not matter now, but it may in the future. 749 */ 750 } 751 752 dma_inuse &= ~(1 << chan); 753} 754 755/* 756 * isa_dmacascade(): program 8237 DMA controller channel to accept 757 * external dma control by a board. 758 */ 759void isa_dmacascade(chan) 760 int chan; 761{ 762#ifdef DIAGNOSTIC 763 if (chan & ~VALID_DMA_MASK) 764 panic("isa_dmacascade: channel out of range"); 765#endif 766 767 /* set dma channel mode, and set dma channel mode */ 768 if ((chan & 4) == 0) { 769 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 770 outb(DMA1_SMSK, chan); 771 } else { 772 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 773 outb(DMA2_SMSK, chan & 3); 774 } 775} 776 777/* 778 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 779 * problems by using a bounce buffer. 780 */ 781void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 782{ 783 vm_offset_t phys; 784 int waport; 785 caddr_t newaddr; 786 787#ifdef DIAGNOSTIC 788 if (chan & ~VALID_DMA_MASK) 789 panic("isa_dmastart: channel out of range"); 790 791 if ((chan < 4 && nbytes > (1<<16)) 792 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 793 panic("isa_dmastart: impossible request"); 794 795 if (dma_inuse & (1 << chan) == 0) 796 printf("isa_dmastart: channel %d not acquired\n", chan); 797#endif 798 799#if 0 800 /* 801 * XXX This should be checked, but drivers like ad1848 only call 802 * isa_dmastart() once because they use Auto DMA mode. If we 803 * leave this in, drivers that do this will print this continuously. 804 */ 805 if (dma_busy & (1 << chan)) 806 printf("isa_dmastart: channel %d busy\n", chan); 807#endif 808 809 dma_busy |= (1 << chan); 810 811 if (isa_dmarangecheck(addr, nbytes, chan)) { 812 if (dma_bouncebuf[chan] == NULL 813 || dma_bouncebufsize[chan] < nbytes) 814 panic("isa_dmastart: bad bounce buffer"); 815 dma_bounced |= (1 << chan); 816 newaddr = dma_bouncebuf[chan]; 817 818 /* copy bounce buffer on write */ 819 if (!(flags & B_READ)) 820 bcopy(addr, newaddr, nbytes); 821 addr = newaddr; 822 } 823 824 /* translate to physical */ 825 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 826 827 if ((chan & 4) == 0) { 828 /* 829 * Program one of DMA channels 0..3. These are 830 * byte mode channels. 831 */ 832 /* set dma channel mode, and reset address ff */ 833 834 /* If B_RAW flag is set, then use autoinitialise mode */ 835 if (flags & B_RAW) { 836 if (flags & B_READ) 837 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 838 else 839 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 840 } 841 else 842 if (flags & B_READ) 843 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 844 else 845 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 846 outb(DMA1_FFC, 0); 847 848 /* send start address */ 849 waport = DMA1_CHN(chan); 850 outb(waport, phys); 851 outb(waport, phys>>8); 852 outb(dmapageport[chan], phys>>16); 853 854 /* send count */ 855 outb(waport + 1, --nbytes); 856 outb(waport + 1, nbytes>>8); 857 858 /* unmask channel */ 859 outb(DMA1_SMSK, chan); 860 } else { 861 /* 862 * Program one of DMA channels 4..7. These are 863 * word mode channels. 864 */ 865 /* set dma channel mode, and reset address ff */ 866 867 /* If B_RAW flag is set, then use autoinitialise mode */ 868 if (flags & B_RAW) { 869 if (flags & B_READ) 870 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 871 else 872 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 873 } 874 else 875 if (flags & B_READ) 876 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 877 else 878 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 879 outb(DMA2_FFC, 0); 880 881 /* send start address */ 882 waport = DMA2_CHN(chan - 4); 883 outb(waport, phys>>1); 884 outb(waport, phys>>9); 885 outb(dmapageport[chan], phys>>16); 886 887 /* send count */ 888 nbytes >>= 1; 889 outb(waport + 2, --nbytes); 890 outb(waport + 2, nbytes>>8); 891 892 /* unmask channel */ 893 outb(DMA2_SMSK, chan & 3); 894 } 895} 896 897void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 898{ 899#ifdef DIAGNOSTIC 900 if (chan & ~VALID_DMA_MASK) 901 panic("isa_dmadone: channel out of range"); 902 903 if (dma_inuse & (1 << chan) == 0) 904 printf("isa_dmadone: channel %d not acquired\n", chan); 905#endif 906 907#if 0 908 /* 909 * XXX This should be checked, but drivers like ad1848 only call 910 * isa_dmastart() once because they use Auto DMA mode. If we 911 * leave this in, drivers that do this will print this continuously. 912 */ 913 if (dma_busy & (1 << chan) == 0) 914 printf("isa_dmadone: channel %d not busy\n", chan); 915#endif 916 917 if (dma_bounced & (1 << chan)) { 918 /* copy bounce buffer on read */ 919 if (flags & B_READ) 920 bcopy(dma_bouncebuf[chan], addr, nbytes); 921 922 dma_bounced &= ~(1 << chan); 923 } 924 dma_busy &= ~(1 << chan); 925} 926 927/* 928 * Check for problems with the address range of a DMA transfer 929 * (non-contiguous physical pages, outside of bus address space, 930 * crossing DMA page boundaries). 931 * Return true if special handling needed. 932 */ 933 934static int 935isa_dmarangecheck(caddr_t va, u_int length, int chan) { 936 vm_offset_t phys, priorpage = 0, endva; 937 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 938 939 endva = (vm_offset_t)round_page(va + length); 940 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 941 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 942#define ISARAM_END RAM_END 943 if (phys == 0) 944 panic("isa_dmacheck: no physical page present"); 945 if (phys >= ISARAM_END) 946 return (1); 947 if (priorpage) { 948 if (priorpage + PAGE_SIZE != phys) 949 return (1); 950 /* check if crossing a DMA page boundary */ 951 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 952 return (1); 953 } 954 priorpage = phys; 955 } 956 return (0); 957} 958 959#define NMI_PARITY (1 << 7) 960#define NMI_IOCHAN (1 << 6) 961#define ENMI_WATCHDOG (1 << 7) 962#define ENMI_BUSTIMER (1 << 6) 963#define ENMI_IOSTATUS (1 << 5) 964 965/* 966 * Handle a NMI, possibly a machine check. 967 * return true to panic system, false to ignore. 968 */ 969int 970isa_nmi(cd) 971 int cd; 972{ 973 int isa_port = inb(0x61); 974 int eisa_port = inb(0x461); 975 if(isa_port & NMI_PARITY) { 976 panic("RAM parity error, likely hardware failure."); 977 } else if(isa_port & NMI_IOCHAN) { 978 panic("I/O channel check, likely hardware failure."); 979 } else if(eisa_port & ENMI_WATCHDOG) { 980 panic("EISA watchdog timer expired, likely hardware failure."); 981 } else if(eisa_port & ENMI_BUSTIMER) { 982 panic("EISA bus timeout, likely hardware failure."); 983 } else if(eisa_port & ENMI_IOSTATUS) { 984 panic("EISA I/O port status error."); 985 } else { 986 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 987 return(0); 988 } 989} 990 991/* 992 * Caught a stray interrupt, notify 993 */ 994static void 995isa_strayintr(d) 996 int d; 997{ 998 999 /* DON'T BOTHER FOR NOW! */ 1000 /* for some reason, we get bursts of intr #7, even if not enabled! */ 1001 /* 1002 * Well the reason you got bursts of intr #7 is because someone 1003 * raised an interrupt line and dropped it before the 8259 could 1004 * prioritize it. This is documented in the intel data book. This 1005 * means you have BAD hardware! I have changed this so that only 1006 * the first 5 get logged, then it quits logging them, and puts 1007 * out a special message. rgrimes 3/25/1993 1008 */ 1009 /* 1010 * XXX TODO print a different message for #7 if it is for a 1011 * glitch. Glitches can be distinguished from real #7's by 1012 * testing that the in-service bit is _not_ set. The test 1013 * must be done before sending an EOI so it can't be done if 1014 * we are using AUTO_EOI_1. 1015 */ 1016 if (intrcnt[NR_DEVICES + d] <= 5) 1017 log(LOG_ERR, "stray irq %d\n", d); 1018 if (intrcnt[NR_DEVICES + d] == 5) 1019 log(LOG_CRIT, 1020 "too many stray irq %d's; not logging any more\n", d); 1021} 1022 1023/* 1024 * Find the highest priority enabled display device. Since we can't 1025 * distinguish display devices from ttys, depend on display devices 1026 * being sensitive and before sensitive non-display devices (if any) 1027 * in isa_devtab_tty. 1028 * 1029 * XXX we should add capability flags IAMDISPLAY and ISUPPORTCONSOLES. 1030 */ 1031struct isa_device * 1032find_display() 1033{ 1034 struct isa_device *dvp; 1035 1036 for (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) 1037 if (dvp->id_driver->sensitive_hw && dvp->id_enabled) 1038 return (dvp); 1039 return (NULL); 1040} 1041 1042/* 1043 * find an ISA device in a given isa_devtab_* table, given 1044 * the table to search, the expected id_driver entry, and the unit number. 1045 * 1046 * this function is defined in isa_device.h, and this location is debatable; 1047 * i put it there because it's useless w/o, and directly operates on 1048 * the other stuff in that file. 1049 * 1050 */ 1051 1052struct isa_device *find_isadev(table, driverp, unit) 1053 struct isa_device *table; 1054 struct isa_driver *driverp; 1055 int unit; 1056{ 1057 if (driverp == NULL) /* sanity check */ 1058 return (NULL); 1059 1060 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 1061 if (table->id_driver == 0) 1062 return NULL; 1063 1064 table++; 1065 } 1066 1067 return (table); 1068} 1069 1070/* 1071 * Return nonzero if a (masked) irq is pending for a given device. 1072 */ 1073#if defined(APIC_IO) 1074 1075int 1076isa_irq_pending(dvp) 1077 struct isa_device *dvp; 1078{ 1079 /* read APIC IRR containing the 16 ISA INTerrupts */ 1080 return ((lapic__irr1 & 0x00ffffff) 1081 & (u_int32_t)dvp->id_irq) ? 1 : 0; 1082} 1083 1084/* 1085 * an 8259 specific routine, 1086 * for use by boot probes in certain device drivers. 1087 */ 1088int 1089icu_irq_pending(dvp) 1090 struct isa_device *dvp; 1091{ 1092 unsigned id_irq; 1093 id_irq = dvp->id_irq; 1094 if (id_irq & 0xff) 1095 return (inb(IO_ICU1) & id_irq); 1096 return (inb(IO_ICU2) & (id_irq >> 8)); 1097} 1098 1099#else /* APIC_IO */ 1100 1101int 1102isa_irq_pending(dvp) 1103 struct isa_device *dvp; 1104{ 1105 unsigned id_irq; 1106 id_irq = dvp->id_irq; 1107 if (id_irq & 0xff) 1108 return (inb(IO_ICU1) & id_irq); 1109 return (inb(IO_ICU2) & (id_irq >> 8)); 1110} 1111 1112#endif /* APIC_IO */ 1113 1114int 1115update_intr_masks(void) 1116{ 1117 int intr, n=0; 1118 u_int mask,*maskptr; 1119 1120 for (intr=0; intr < ICU_LEN; intr ++) { 1121#if defined(APIC_IO) 1122 /* no 8259 SLAVE to ignore */ 1123#else 1124 if (intr==2) continue; /* ignore 8259 SLAVE output */ 1125#endif /* APIC_IO */ 1126 maskptr = intr_mptr[intr]; 1127 if (!maskptr) continue; 1128 *maskptr |= 1 << intr; 1129 mask = *maskptr; 1130 if (mask != intr_mask[intr]) { 1131#if 0 1132 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 1133 intr, intr_mask[intr], mask, maskptr); 1134#endif 1135 intr_mask[intr]=mask; 1136 n++; 1137 } 1138 1139 } 1140 return (n); 1141} 1142 1143/* 1144 * The find_device_id function is only required because of the way the 1145 * device names are currently stored for reporting in systat or vmstat. 1146 * In fact, those programs should be modified to use the sysctl interface 1147 * to obtain a list of driver names by traversing intreclist_head[irq]. 1148 */ 1149 1150static int 1151find_device_id(int irq) 1152{ 1153 char buf[16]; 1154 char *cp; 1155 int free_id, id; 1156 1157 sprintf(buf, "pci irq%d", irq); 1158 cp = intrnames; 1159 /* default to 0, which corresponds to clk0 */ 1160 free_id = 0; 1161 1162 for (id = 0; id < NR_DEVICES; id++) { 1163 if (strcmp(cp, buf) == 0) 1164 return (id); 1165 if (free_id == 0 && strcmp(cp, "pci irqnn") == 0) 1166 free_id = id; 1167 while (*cp++ != '\0'); 1168 } 1169#if 0 1170 if (free_id == 0) { 1171 /* 1172 * All pci irq counters are in use, perhaps because config 1173 * is old so there aren't any. Abuse the clk0 counter. 1174 */ 1175 printf("\tcounting shared irq%d as clk0 irq\n", irq); 1176 } 1177#endif 1178 return (free_id); 1179} 1180 1181void 1182update_intrname(int intr, int device_id) 1183{ 1184 char *cp; 1185 int id; 1186 1187 if (device_id == -1) 1188 device_id = find_device_id(intr); 1189 1190 if ((u_int)device_id >= NR_DEVICES) 1191 return; 1192 1193 intr_countp[intr] = &intrcnt[device_id]; 1194 1195 for (cp = intrnames, id = 0; id <= device_id; id++) 1196 while (*cp++ != '\0') 1197 ; 1198 if (cp > eintrnames) 1199 return; 1200 if (intr < 10) { 1201 cp[-3] = intr + '0'; 1202 cp[-2] = ' '; 1203 } else if (intr < 20) { 1204 cp[-3] = '1'; 1205 cp[-2] = intr - 10 + '0'; 1206 } else { 1207 cp[-3] = '2'; 1208 cp[-2] = intr - 20 + '0'; 1209 } 1210} 1211 1212int 1213icu_setup(int intr, inthand2_t *handler, void *arg, u_int *maskptr, int flags) 1214{ 1215 u_long ef; 1216 u_int mask = (maskptr ? *maskptr : 0); 1217 1218#if defined(APIC_IO) 1219 if ((u_int)intr >= ICU_LEN) /* no 8259 SLAVE to ignore */ 1220#else 1221 if ((u_int)intr >= ICU_LEN || intr == 2) 1222#endif /* APIC_IO */ 1223 if (intr_handler[intr] != isa_strayintr) 1224 return (EBUSY); 1225 1226 ef = read_eflags(); 1227 disable_intr(); 1228 intr_handler[intr] = handler; 1229 intr_mptr[intr] = maskptr; 1230 intr_mask[intr] = mask | (1 << intr); 1231 intr_unit[intr] = arg; 1232 setidt(ICU_OFFSET + intr, 1233 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1234 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1235 INTREN(1 << intr); 1236 write_eflags(ef); 1237 return (0); 1238} 1239 1240static void 1241register_imask(dvp, mask) 1242 struct isa_device *dvp; 1243 u_int mask; 1244{ 1245 if (dvp->id_alive && dvp->id_irq) { 1246 int intr; 1247 1248 intr = ffs(dvp->id_irq) - 1; 1249 intr_mask[intr] = mask | (1 <<intr); 1250 } 1251 (void) update_intr_masks(); 1252} 1253 1254int 1255icu_unset(intr, handler) 1256 int intr; 1257 inthand2_t *handler; 1258{ 1259 u_long ef; 1260 1261 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1262 return (EINVAL); 1263 1264 INTRDIS(1 << intr); 1265 ef = read_eflags(); 1266 disable_intr(); 1267 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1268 intr_handler[intr] = isa_strayintr; 1269 intr_mptr[intr] = NULL; 1270 intr_mask[intr] = HWI_MASK | SWI_MASK; 1271 intr_unit[intr] = intr; 1272 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, 1273 GSEL(GCODE_SEL, SEL_KPL)); 1274 write_eflags(ef); 1275 return (0); 1276} 1277