isa.c revision 16733
156893Sfenner/*- 256893Sfenner * Copyright (c) 1991 The Regents of the University of California. 356893Sfenner * All rights reserved. 4127668Sbms * 556893Sfenner * This code is derived from software contributed to Berkeley by 656893Sfenner * William Jolitz. 756893Sfenner * 856893Sfenner * Redistribution and use in source and binary forms, with or without 956893Sfenner * modification, are permitted provided that the following conditions 1056893Sfenner * are met: 1156893Sfenner * 1. Redistributions of source code must retain the above copyright 1256893Sfenner * notice, this list of conditions and the following disclaimer. 1356893Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1456893Sfenner * notice, this list of conditions and the following disclaimer in the 1556893Sfenner * documentation and/or other materials provided with the distribution. 16127668Sbms * 3. All advertising materials mentioning features or use of this software 1756893Sfenner * must display the following acknowledgement: 1856893Sfenner * This product includes software developed by the University of 1956893Sfenner * California, Berkeley and its contributors. 2056893Sfenner * 4. Neither the name of the University nor the names of its contributors 2156893Sfenner * may be used to endorse or promote products derived from this software 2256893Sfenner * without specific prior written permission. 2356893Sfenner * 2456893Sfenner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2556893Sfenner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2656893Sfenner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2756893Sfenner * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2856893Sfenner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2956893Sfenner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3056893Sfenner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3156893Sfenner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3256893Sfenner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3356893Sfenner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3456893Sfenner * SUCH DAMAGE. 3556893Sfenner * 3656893Sfenner * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 3756893Sfenner * $Id: isa.c,v 1.70 1996/05/02 10:43:09 phk Exp $ 3856893Sfenner */ 3956893Sfenner 4056893Sfenner/* 4156893Sfenner * code to manage AT bus 42127668Sbms * 4356893Sfenner * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 4456893Sfenner * Fixed uninitialized variable problem and added code to deal 45127668Sbms * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46190207Srpaulo * mode DMA count compution and reorganized DMA setup code in 4756893Sfenner * isa_dmastart() 4856893Sfenner */ 4956893Sfenner 5056893Sfenner#include "opt_auto_eoi.h" 5156893Sfenner 5256893Sfenner#include <sys/param.h> 5356893Sfenner#include <sys/systm.h> 5456893Sfenner#include <sys/sysctl.h> 5556893Sfenner#include <sys/buf.h> 5656893Sfenner#include <sys/syslog.h> 5756893Sfenner#include <sys/malloc.h> 5856893Sfenner#include <machine/md_var.h> 5956893Sfenner#include <machine/segments.h> 6056893Sfenner#include <vm/vm.h> 6156893Sfenner#include <vm/vm_param.h> 6256893Sfenner#include <vm/pmap.h> 6356893Sfenner#include <i386/isa/isa_device.h> 6456893Sfenner#include <i386/isa/isa.h> 6556893Sfenner#include <i386/isa/icu.h> 6656893Sfenner#include <i386/isa/ic/i8237.h> 6756893Sfenner#include <sys/devconf.h> 6856893Sfenner#include "vector.h" 6956893Sfenner 7056893Sfenner/* 7156893Sfenner** Register definitions for DMA controller 1 (channels 0..3): 7256893Sfenner*/ 7356893Sfenner#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 7456893Sfenner#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 7556893Sfenner#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 7656893Sfenner#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 7756893Sfenner 7856893Sfenner/* 7956893Sfenner** Register definitions for DMA controller 2 (channels 4..7): 8056893Sfenner*/ 8156893Sfenner#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 8256893Sfenner#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 8356893Sfenner#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 8456893Sfenner#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 8556893Sfenner 8656893Sfenneru_long *intr_countp[ICU_LEN]; 8756893Sfennerinthand2_t *intr_handler[ICU_LEN]; 8856893Sfenneru_int intr_mask[ICU_LEN]; 8956893Sfenneru_int* intr_mptr[ICU_LEN]; 9056893Sfennerint intr_unit[ICU_LEN]; 9156893Sfenner 9256893Sfennerextern struct kern_devconf kdc_cpu0; 9356893Sfenner 9456893Sfennerstruct kern_devconf kdc_isa0 = { 9556893Sfenner 0, 0, 0, /* filled in by dev_attach */ 9656893Sfenner "isa", 0, { MDDT_BUS, 0 }, 9756893Sfenner 0, 0, 0, BUS_EXTERNALLEN, 9856893Sfenner &kdc_cpu0, /* parent is the CPU */ 9956893Sfenner 0, /* no parentdata */ 10056893Sfenner DC_BUSY, /* busses are always busy */ 10156893Sfenner "ISA bus", 10256893Sfenner DC_CLS_BUS /* class */ 10356893Sfenner}; 10456893Sfenner 10556893Sfennerstatic inthand_t *fastintr[ICU_LEN] = { 10656893Sfenner &IDTVEC(fastintr0), &IDTVEC(fastintr1), 10756893Sfenner &IDTVEC(fastintr2), &IDTVEC(fastintr3), 10856893Sfenner &IDTVEC(fastintr4), &IDTVEC(fastintr5), 10956893Sfenner &IDTVEC(fastintr6), &IDTVEC(fastintr7), 11056893Sfenner &IDTVEC(fastintr8), &IDTVEC(fastintr9), 11156893Sfenner &IDTVEC(fastintr10), &IDTVEC(fastintr11), 11256893Sfenner &IDTVEC(fastintr12), &IDTVEC(fastintr13), 11356893Sfenner &IDTVEC(fastintr14), &IDTVEC(fastintr15) 11456893Sfenner}; 11556893Sfenner 11656893Sfennerstatic inthand_t *slowintr[ICU_LEN] = { 11756893Sfenner &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 11856893Sfenner &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 11956893Sfenner &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 12056893Sfenner &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 12156893Sfenner}; 12256893Sfenner 12356893Sfennerstatic void config_isadev __P((struct isa_device *isdp, u_int *mp)); 12456893Sfennerstatic void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 12556893Sfenner int reconfig)); 12656893Sfennerstatic void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 127127668Sbms int item, char const *whatnot, char const *reason, 12856893Sfenner char const *format)); 12956893Sfennerstatic int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 13056893Sfenner u_int checkbits)); 13156893Sfennerstatic int isa_dmarangecheck __P((caddr_t va, u_int length, int chan)); 13256893Sfennerstatic inthand2_t isa_strayintr; 13356893Sfennerstatic void register_imask __P((struct isa_device *dvp, u_int mask)); 13456893Sfenner 135127668Sbms/* 13656893Sfenner * print a conflict message 13756893Sfenner */ 13856893Sfennerstatic void 139127668Sbmsconflict(dvp, tmpdvp, item, whatnot, reason, format) 14056893Sfenner struct isa_device *dvp; 14156893Sfenner struct isa_device *tmpdvp; 14256893Sfenner int item; 14356893Sfenner char const *whatnot; 14456893Sfenner char const *reason; 14556893Sfenner char const *format; 14656893Sfenner{ 14756893Sfenner printf("%s%d not %sed due to %s conflict with %s%d at ", 14856893Sfenner dvp->id_driver->name, dvp->id_unit, whatnot, reason, 14956893Sfenner tmpdvp->id_driver->name, tmpdvp->id_unit); 15056893Sfenner printf(format, item); 15156893Sfenner printf("\n"); 15256893Sfenner} 15356893Sfenner 15456893Sfenner/* 15556893Sfenner * Check to see if things are already in use, like IRQ's, I/O addresses 15656893Sfenner * and Memory addresses. 15756893Sfenner */ 15875115Sfennerstatic int 15956893Sfennerhaveseen(dvp, tmpdvp, checkbits) 16056893Sfenner struct isa_device *dvp; 16156893Sfenner struct isa_device *tmpdvp; 16275115Sfenner u_int checkbits; 16375115Sfenner{ 16456893Sfenner /* 16556893Sfenner * Only check against devices that have already been found and are not 16656893Sfenner * unilaterally allowed to conflict anyway. 16756893Sfenner */ 16856893Sfenner if (tmpdvp->id_alive && !dvp->id_conflicts) { 16956893Sfenner char const *whatnot; 17056893Sfenner 17156893Sfenner whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 17256893Sfenner /* 17356893Sfenner * Check for I/O address conflict. We can only check the 17456893Sfenner * starting address of the device against the range of the 17556893Sfenner * device that has already been probed since we do not 17656893Sfenner * know how many I/O addresses this device uses. 177127668Sbms */ 17856893Sfenner if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 17956893Sfenner if ((dvp->id_iobase >= tmpdvp->id_iobase) && 18056893Sfenner (dvp->id_iobase <= 18156893Sfenner (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 18256893Sfenner conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 18356893Sfenner "I/O address", "0x%x"); 18456893Sfenner return 1; 18556893Sfenner } 18656893Sfenner } 18756893Sfenner /* 18856893Sfenner * Check for Memory address conflict. We can check for 18956893Sfenner * range overlap, but it will not catch all cases since the 19056893Sfenner * driver may adjust the msize paramater during probe, for 19156893Sfenner * now we just check that the starting address does not 19256893Sfenner * fall within any allocated region. 19356893Sfenner * XXX could add a second check after the probe for overlap, 19456893Sfenner * since at that time we would know the full range. 19556893Sfenner * XXX KERNBASE is a hack, we should have vaddr in the table! 19656893Sfenner */ 19756893Sfenner if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 19856893Sfenner if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 19956893Sfenner (KERNBASE + dvp->id_maddr <= 20056893Sfenner (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 20156893Sfenner conflict(dvp, tmpdvp, (int)dvp->id_maddr, 20256893Sfenner whatnot, "maddr", "0x%x"); 20356893Sfenner return 1; 20456893Sfenner } 20556893Sfenner } 20656893Sfenner /* 20756893Sfenner * Check for IRQ conflicts. 20856893Sfenner */ 20956893Sfenner if (checkbits & CC_IRQ && tmpdvp->id_irq) { 21056893Sfenner if (tmpdvp->id_irq == dvp->id_irq) { 21156893Sfenner conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 21256893Sfenner whatnot, "irq", "%d"); 21356893Sfenner return 1; 21456893Sfenner } 21556893Sfenner } 21656893Sfenner /* 21756893Sfenner * Check for DRQ conflicts. 21856893Sfenner */ 21975115Sfenner if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 22056893Sfenner if (tmpdvp->id_drq == dvp->id_drq) { 22156893Sfenner conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 22256893Sfenner "drq", "%d"); 22356893Sfenner return 1; 22456893Sfenner } 22556893Sfenner } 22656893Sfenner } 22756893Sfenner return 0; 22856893Sfenner} 22956893Sfenner 23056893Sfenner/* 23156893Sfenner * Search through all the isa_devtab_* tables looking for anything that 23256893Sfenner * conflicts with the current device. 23356893Sfenner */ 23456893Sfennerint 23556893Sfennerhaveseen_isadev(dvp, checkbits) 23656893Sfenner struct isa_device *dvp; 23756893Sfenner u_int checkbits; 23856893Sfenner{ 23956893Sfenner struct isa_device *tmpdvp; 24056893Sfenner int status = 0; 24156893Sfenner 24256893Sfenner for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 24356893Sfenner status |= haveseen(dvp, tmpdvp, checkbits); 24456893Sfenner if (status) 24556893Sfenner return status; 24656893Sfenner } 24756893Sfenner for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 24856893Sfenner status |= haveseen(dvp, tmpdvp, checkbits); 24956893Sfenner if (status) 25056893Sfenner return status; 25156893Sfenner } 25256893Sfenner for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 25356893Sfenner status |= haveseen(dvp, tmpdvp, checkbits); 25456893Sfenner if (status) 25556893Sfenner return status; 25656893Sfenner } 25756893Sfenner for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 25856893Sfenner status |= haveseen(dvp, tmpdvp, checkbits); 25975115Sfenner if (status) 26056893Sfenner return status; 26156893Sfenner } 26256893Sfenner return(status); 26356893Sfenner} 26456893Sfenner 26556893Sfenner/* 26656893Sfenner * Configure all ISA devices 26756893Sfenner */ 26856893Sfennervoid 26956893Sfennerisa_configure() { 27056893Sfenner struct isa_device *dvp; 27156893Sfenner 27256893Sfenner dev_attach(&kdc_isa0); 27356893Sfenner 27456893Sfenner splhigh(); 27575115Sfenner printf("Probing for devices on the ISA bus:\n"); 27656893Sfenner /* First probe all the sensitive probes */ 27756893Sfenner for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 27856893Sfenner if (dvp->id_driver->sensitive_hw) 27956893Sfenner config_isadev(dvp, &tty_imask); 28056893Sfenner for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 28156893Sfenner if (dvp->id_driver->sensitive_hw) 282 config_isadev(dvp, &bio_imask); 283 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 284 if (dvp->id_driver->sensitive_hw) 285 config_isadev(dvp, &net_imask); 286 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 287 if (dvp->id_driver->sensitive_hw) 288 config_isadev(dvp, (u_int *)NULL); 289 290 /* Then all the bad ones */ 291 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 292 if (!dvp->id_driver->sensitive_hw) 293 config_isadev(dvp, &tty_imask); 294 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 295 if (!dvp->id_driver->sensitive_hw) 296 config_isadev(dvp, &bio_imask); 297 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 298 if (!dvp->id_driver->sensitive_hw) 299 config_isadev(dvp, &net_imask); 300 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 301 if (!dvp->id_driver->sensitive_hw) 302 config_isadev(dvp, (u_int *)NULL); 303 304 bio_imask |= SWI_CLOCK_MASK; 305 net_imask |= SWI_NET_MASK; 306 tty_imask |= SWI_TTY_MASK; 307 308/* 309 * XXX we should really add the tty device to net_imask when the line is 310 * switched to SLIPDISC, and then remove it when it is switched away from 311 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 312 * of them is running slip. 313 * 314 * XXX actually, blocking all ttys during a splimp doesn't matter so much 315 * with sio because the serial interrupt layer doesn't use tty_imask. Only 316 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 317 * during spltty. 318 */ 319#include "sl.h" 320#if NSL > 0 321 net_imask |= tty_imask; 322 tty_imask = net_imask; 323#endif 324 325 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 326 327 if (bootverbose) 328 printf("imasks: bio %x, tty %x, net %x\n", 329 bio_imask, tty_imask, net_imask); 330 331 /* 332 * Finish initializing intr_mask[]. Note that the partly 333 * constructed masks aren't actually used since we're at splhigh. 334 * For fully dynamic initialization, register_intr() and 335 * unregister_intr() will have to adjust the masks for _all_ 336 * interrupts and for tty_imask, etc. 337 */ 338 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 339 register_imask(dvp, tty_imask); 340 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 341 register_imask(dvp, bio_imask); 342 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 343 register_imask(dvp, net_imask); 344 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 345 register_imask(dvp, SWI_CLOCK_MASK); 346 spl0(); 347} 348 349/* 350 * Configure an ISA device. 351 */ 352 353 354static void 355config_isadev(isdp, mp) 356 struct isa_device *isdp; 357 u_int *mp; 358{ 359 config_isadev_c(isdp, mp, 0); 360} 361 362void 363reconfig_isadev(isdp, mp) 364 struct isa_device *isdp; 365 u_int *mp; 366{ 367 config_isadev_c(isdp, mp, 1); 368} 369 370static void 371config_isadev_c(isdp, mp, reconfig) 372 struct isa_device *isdp; 373 u_int *mp; 374 int reconfig; 375{ 376 u_int checkbits; 377 int id_alive; 378 int last_alive; 379 struct isa_driver *dp = isdp->id_driver; 380 381 if (!isdp->id_enabled) { 382 printf("%s%d: disabled, not probed.\n", 383 dp->name, isdp->id_unit); 384 return; 385 } 386 checkbits = CC_DRQ | CC_IOADDR | CC_MEMADDR; 387 if (!reconfig && haveseen_isadev(isdp, checkbits)) 388 return; 389 if (!reconfig && isdp->id_maddr) { 390 isdp->id_maddr -= 0xa0000; /* XXX should be a define */ 391 isdp->id_maddr += atdevbase; 392 } 393 if (reconfig) { 394 last_alive = isdp->id_alive; 395 isdp->id_reconfig = 1; 396 } 397 else { 398 last_alive = 0; 399 isdp->id_reconfig = 0; 400 } 401 id_alive = (*dp->probe)(isdp); 402 if (id_alive) { 403 /* 404 * Only print the I/O address range if id_alive != -1 405 * Right now this is a temporary fix just for the new 406 * NPX code so that if it finds a 486 that can use trap 407 * 16 it will not report I/O addresses. 408 * Rod Grimes 04/26/94 409 */ 410 if (!isdp->id_reconfig) { 411 printf("%s%d", dp->name, isdp->id_unit); 412 if (id_alive != -1) { 413 printf(" at 0x%x", isdp->id_iobase); 414 if (isdp->id_iobase + id_alive - 1 != 415 isdp->id_iobase) { 416 printf("-0x%x", 417 isdp->id_iobase + id_alive - 1); 418 } 419 } 420 if (isdp->id_irq) 421 printf(" irq %d", ffs(isdp->id_irq) - 1); 422 if (isdp->id_drq != -1) 423 printf(" drq %d", isdp->id_drq); 424 if (isdp->id_maddr) 425 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 426 if (isdp->id_msize) 427 printf(" msize %d", isdp->id_msize); 428 if (isdp->id_flags) 429 printf(" flags 0x%x", isdp->id_flags); 430 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 431 printf(" on motherboard"); 432 } else if (isdp->id_iobase >= 0x1000 && 433 !(isdp->id_iobase & 0x300)) { 434 printf (" on eisa slot %d", 435 isdp->id_iobase >> 12); 436 } else { 437 printf (" on isa"); 438 } 439 printf("\n"); 440 /* 441 * Check for conflicts again. The driver may have 442 * changed *dvp. We should weaken the early check 443 * since the driver may have been able to change 444 * *dvp to avoid conflicts if given a chance. We 445 * already skip the early check for IRQs and force 446 * a check for IRQs in the next group of checks. 447 */ 448 checkbits |= CC_IRQ; 449 if (haveseen_isadev(isdp, checkbits)) 450 return; 451 isdp->id_alive = id_alive; 452 } 453 (*dp->attach)(isdp); 454 if (isdp->id_irq) { 455 if (mp) 456 INTRMASK(*mp, isdp->id_irq); 457 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 458 isdp->id_ri_flags, isdp->id_intr, 459 mp, isdp->id_unit); 460 INTREN(isdp->id_irq); 461 } 462 } else { 463 if (isdp->id_reconfig) { 464 (*dp->attach)(isdp); /* reconfiguration attach */ 465 } 466 if (!last_alive) { 467 if (!isdp->id_reconfig) { 468 printf("%s%d not found", 469 dp->name, isdp->id_unit); 470 if (isdp->id_iobase) { 471 printf(" at 0x%x", isdp->id_iobase); 472 } 473 printf("\n"); 474 } 475 } 476 else { 477 /* This code has not been tested.... */ 478 if (isdp->id_irq) { 479 INTRDIS(isdp->id_irq); 480 unregister_intr(ffs(isdp->id_irq) - 1, 481 isdp->id_intr); 482 if (mp) 483 INTRUNMASK(*mp, isdp->id_irq); 484 } 485 } 486 } 487} 488 489/* 490 * Provide ISA-specific device information to user programs using the 491 * hw.devconf interface. 492 */ 493int 494isa_externalize(struct isa_device *id, struct sysctl_req *req) 495{ 496 return (SYSCTL_OUT(req, id, sizeof *id)); 497} 498 499/* 500 * This is used to forcibly reconfigure an ISA device. It currently just 501 * returns an error 'cos you can't do that yet. It is here to demonstrate 502 * what the `internalize' routine is supposed to do. 503 */ 504int 505isa_internalize(struct isa_device *id, struct sysctl_req *req) 506{ 507 struct isa_device myid; 508 int rv; 509 510 rv = SYSCTL_IN(req, &myid, sizeof *id); 511 if(rv) 512 return rv; 513 514 rv = EOPNOTSUPP; 515 /* code would go here to validate the configuration request */ 516 /* code would go here to actually perform the reconfiguration */ 517 return rv; 518} 519 520int 521isa_generic_externalize(struct kern_devconf *kdc, struct sysctl_req *req) 522{ 523 return isa_externalize(kdc->kdc_isa, req); 524} 525 526/* 527 * Fill in default interrupt table (in case of spuruious interrupt 528 * during configuration of kernel, setup interrupt control unit 529 */ 530void 531isa_defaultirq() 532{ 533 int i; 534 535 /* icu vectors */ 536 for (i = 0; i < ICU_LEN; i++) 537 unregister_intr(i, (inthand2_t *)NULL); 538 539 /* initialize 8259's */ 540 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 541 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 542 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 543#ifdef AUTO_EOI_1 544 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 545#else 546 outb(IO_ICU1+1, 1); /* 8086 mode */ 547#endif 548 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 549 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 550 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 551 552 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 553 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 554 outb(IO_ICU2+1,2); /* my slave id is 2 */ 555#ifdef AUTO_EOI_2 556 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 557#else 558 outb(IO_ICU2+1,1); /* 8086 mode */ 559#endif 560 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 561 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 562} 563 564static caddr_t dma_bouncebuf[8]; 565static u_int dma_bouncebufsize[8]; 566static u_int8_t dma_bounced = 0; 567static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 568static u_int8_t dma_inuse = 0; /* User for acquire/release */ 569 570#define VALID_DMA_MASK (7) 571 572/* high byte of address is stored in this port for i-th dma channel */ 573static short dmapageport[8] = 574 { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 575 576/* 577 * Setup a DMA channel's bounce buffer. 578 */ 579void 580isa_dmainit(chan, bouncebufsize) 581 int chan; 582 u_int bouncebufsize; 583{ 584 void *buf; 585 586#ifdef DIAGNOSTIC 587 if (chan & ~VALID_DMA_MASK) 588 panic("isa_dmainit: channel out of range"); 589 590 if (dma_bouncebuf[chan] != NULL) 591 panic("isa_dmainit: impossible request"); 592#endif 593 594 dma_bouncebufsize[chan] = bouncebufsize; 595 596 /* Try malloc() first. It works better if it works. */ 597 buf = malloc(bouncebufsize, M_DEVBUF, M_NOWAIT); 598 if (buf != NULL) { 599 if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 600 dma_bouncebuf[chan] = buf; 601 return; 602 } 603 free(buf, M_DEVBUF); 604 } 605 buf = contigmalloc(bouncebufsize, M_DEVBUF, M_NOWAIT, 0ul, 0xfffffful, 606 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 607 if (buf == NULL) 608 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 609 else 610 dma_bouncebuf[chan] = buf; 611} 612 613/* 614 * Register a DMA channel's usage. Usually called from a device driver 615 * in open() or during it's initialization. 616 */ 617int 618isa_dma_acquire(chan) 619 int chan; 620{ 621#ifdef DIAGNOSTIC 622 if (chan & ~VALID_DMA_MASK) 623 panic("isa_dma_acquire: channel out of range"); 624#endif 625 626 if (dma_inuse & (1 << chan)) { 627 printf("isa_dma_acquire: channel %d already in use\n", chan); 628 return (EBUSY); 629 } 630 dma_inuse |= (1 << chan); 631 632 return (0); 633} 634 635/* 636 * Unregister a DMA channel's usage. Usually called from a device driver 637 * during close() or during it's shutdown. 638 */ 639void 640isa_dma_release(chan) 641 int chan; 642{ 643#ifdef DIAGNOSTIC 644 if (chan & ~VALID_DMA_MASK) 645 panic("isa_dma_release: channel out of range"); 646 647 if (dma_inuse & (1 << chan) == 0) 648 printf("isa_dma_release: channel %d not in use\n", chan); 649#endif 650 651 if (dma_busy & (1 << chan)) { 652 dma_busy &= ~(1 << chan); 653 /* 654 * XXX We should also do "dma_bounced &= (1 << chan);" 655 * because we are acting on behalf of isa_dmadone() which 656 * was not called to end the last DMA operation. This does 657 * not matter now, but it may in the future. 658 */ 659 } 660 661 dma_inuse &= ~(1 << chan); 662} 663 664/* 665 * isa_dmacascade(): program 8237 DMA controller channel to accept 666 * external dma control by a board. 667 */ 668void isa_dmacascade(chan) 669 int chan; 670{ 671#ifdef DIAGNOSTIC 672 if (chan & ~VALID_DMA_MASK) 673 panic("isa_dmacascade: channel out of range"); 674#endif 675 676 /* set dma channel mode, and set dma channel mode */ 677 if ((chan & 4) == 0) { 678 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 679 outb(DMA1_SMSK, chan); 680 } else { 681 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 682 outb(DMA2_SMSK, chan & 3); 683 } 684} 685 686/* 687 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 688 * problems by using a bounce buffer. 689 */ 690void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 691{ 692 vm_offset_t phys; 693 int waport; 694 caddr_t newaddr; 695 696#ifdef DIAGNOSTIC 697 if (chan & ~VALID_DMA_MASK) 698 panic("isa_dmastart: channel out of range"); 699 700 if ((chan < 4 && nbytes > (1<<16)) 701 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 702 panic("isa_dmastart: impossible request"); 703 704 if (dma_inuse & (1 << chan) == 0) 705 printf("isa_dmastart: channel %d not acquired\n", chan); 706#endif 707 708 if (dma_busy & (1 << chan)) 709 printf("isa_dmastart: channel %d busy\n", chan); 710 711 dma_busy |= (1 << chan); 712 713 if (isa_dmarangecheck(addr, nbytes, chan)) { 714 if (dma_bouncebuf[chan] == NULL 715 || dma_bouncebufsize[chan] < nbytes) 716 panic("isa_dmastart: bad bounce buffer"); 717 dma_bounced |= (1 << chan); 718 newaddr = dma_bouncebuf[chan]; 719 720 /* copy bounce buffer on write */ 721 if (!(flags & B_READ)) 722 bcopy(addr, newaddr, nbytes); 723 addr = newaddr; 724 } 725 726 /* translate to physical */ 727 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 728 729 if ((chan & 4) == 0) { 730 /* 731 * Program one of DMA channels 0..3. These are 732 * byte mode channels. 733 */ 734 /* set dma channel mode, and reset address ff */ 735 736 /* If B_RAW flag is set, then use autoinitialise mode */ 737 if (flags & B_RAW) { 738 if (flags & B_READ) 739 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 740 else 741 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 742 } 743 else 744 if (flags & B_READ) 745 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 746 else 747 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 748 outb(DMA1_FFC, 0); 749 750 /* send start address */ 751 waport = DMA1_CHN(chan); 752 outb(waport, phys); 753 outb(waport, phys>>8); 754 outb(dmapageport[chan], phys>>16); 755 756 /* send count */ 757 outb(waport + 1, --nbytes); 758 outb(waport + 1, nbytes>>8); 759 760 /* unmask channel */ 761 outb(DMA1_SMSK, chan); 762 } else { 763 /* 764 * Program one of DMA channels 4..7. These are 765 * word mode channels. 766 */ 767 /* set dma channel mode, and reset address ff */ 768 769 /* If B_RAW flag is set, then use autoinitialise mode */ 770 if (flags & B_RAW) { 771 if (flags & B_READ) 772 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 773 else 774 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 775 } 776 else 777 if (flags & B_READ) 778 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 779 else 780 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 781 outb(DMA2_FFC, 0); 782 783 /* send start address */ 784 waport = DMA2_CHN(chan - 4); 785 outb(waport, phys>>1); 786 outb(waport, phys>>9); 787 outb(dmapageport[chan], phys>>16); 788 789 /* send count */ 790 nbytes >>= 1; 791 outb(waport + 2, --nbytes); 792 outb(waport + 2, nbytes>>8); 793 794 /* unmask channel */ 795 outb(DMA2_SMSK, chan & 3); 796 } 797} 798 799void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 800{ 801#ifdef DIAGNOSTIC 802 if (chan & ~VALID_DMA_MASK) 803 panic("isa_dmadone: channel out of range"); 804 805 if (dma_inuse & (1 << chan) == 0) 806 printf("isa_dmadone: channel %d not acquired\n", chan); 807#endif 808 809#if 0 810 /* 811 * XXX This should be checked, but drivers like ad1848 only call 812 * isa_dmastart() once because they use Auto DMA mode. If we 813 * leave this in, drivers that do this will print this continuously. 814 */ 815 if (dma_busy & (1 << chan) == 0) 816 printf("isa_dmadone: channel %d not busy\n", chan); 817#endif 818 819 if (dma_bounced & (1 << chan)) { 820 /* copy bounce buffer on read */ 821 if (flags & B_READ) 822 bcopy(dma_bouncebuf[chan], addr, nbytes); 823 824 dma_bounced &= ~(1 << chan); 825 } 826 dma_busy &= ~(1 << chan); 827} 828 829/* 830 * Check for problems with the address range of a DMA transfer 831 * (non-contiguous physical pages, outside of bus address space, 832 * crossing DMA page boundaries). 833 * Return true if special handling needed. 834 */ 835 836static int 837isa_dmarangecheck(caddr_t va, u_int length, int chan) { 838 vm_offset_t phys, priorpage = 0, endva; 839 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 840 841 endva = (vm_offset_t)round_page(va + length); 842 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 843 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 844#define ISARAM_END RAM_END 845 if (phys == 0) 846 panic("isa_dmacheck: no physical page present"); 847 if (phys >= ISARAM_END) 848 return (1); 849 if (priorpage) { 850 if (priorpage + PAGE_SIZE != phys) 851 return (1); 852 /* check if crossing a DMA page boundary */ 853 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 854 return (1); 855 } 856 priorpage = phys; 857 } 858 return (0); 859} 860 861#define NMI_PARITY (1 << 7) 862#define NMI_IOCHAN (1 << 6) 863#define ENMI_WATCHDOG (1 << 7) 864#define ENMI_BUSTIMER (1 << 6) 865#define ENMI_IOSTATUS (1 << 5) 866 867/* 868 * Handle a NMI, possibly a machine check. 869 * return true to panic system, false to ignore. 870 */ 871int 872isa_nmi(cd) 873 int cd; 874{ 875 int isa_port = inb(0x61); 876 int eisa_port = inb(0x461); 877 if(isa_port & NMI_PARITY) { 878 panic("RAM parity error, likely hardware failure."); 879 } else if(isa_port & NMI_IOCHAN) { 880 panic("I/O channel check, likely hardware failure."); 881 } else if(eisa_port & ENMI_WATCHDOG) { 882 panic("EISA watchdog timer expired, likely hardware failure."); 883 } else if(eisa_port & ENMI_BUSTIMER) { 884 panic("EISA bus timeout, likely hardware failure."); 885 } else if(eisa_port & ENMI_IOSTATUS) { 886 panic("EISA I/O port status error."); 887 } else { 888 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 889 return(0); 890 } 891} 892 893/* 894 * Caught a stray interrupt, notify 895 */ 896static void 897isa_strayintr(d) 898 int d; 899{ 900 901 /* DON'T BOTHER FOR NOW! */ 902 /* for some reason, we get bursts of intr #7, even if not enabled! */ 903 /* 904 * Well the reason you got bursts of intr #7 is because someone 905 * raised an interrupt line and dropped it before the 8259 could 906 * prioritize it. This is documented in the intel data book. This 907 * means you have BAD hardware! I have changed this so that only 908 * the first 5 get logged, then it quits logging them, and puts 909 * out a special message. rgrimes 3/25/1993 910 */ 911 /* 912 * XXX TODO print a different message for #7 if it is for a 913 * glitch. Glitches can be distinguished from real #7's by 914 * testing that the in-service bit is _not_ set. The test 915 * must be done before sending an EOI so it can't be done if 916 * we are using AUTO_EOI_1. 917 */ 918 if (intrcnt[NR_DEVICES + d] <= 5) 919 log(LOG_ERR, "stray irq %d\n", d); 920 if (intrcnt[NR_DEVICES + d] == 5) 921 log(LOG_CRIT, 922 "too many stray irq %d's; not logging any more\n", d); 923} 924 925/* 926 * Find the highest priority enabled display device. Since we can't 927 * distinguish display devices from ttys, depend on display devices 928 * being sensitive and before sensitive non-display devices (if any) 929 * in isa_devtab_tty. 930 * 931 * XXX we should add capability flags IAMDISPLAY and ISUPPORTCONSOLES. 932 */ 933struct isa_device * 934find_display() 935{ 936 struct isa_device *dvp; 937 938 for (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) 939 if (dvp->id_driver->sensitive_hw && dvp->id_enabled) 940 return (dvp); 941 return (NULL); 942} 943 944/* 945 * find an ISA device in a given isa_devtab_* table, given 946 * the table to search, the expected id_driver entry, and the unit number. 947 * 948 * this function is defined in isa_device.h, and this location is debatable; 949 * i put it there because it's useless w/o, and directly operates on 950 * the other stuff in that file. 951 * 952 */ 953 954struct isa_device *find_isadev(table, driverp, unit) 955 struct isa_device *table; 956 struct isa_driver *driverp; 957 int unit; 958{ 959 if (driverp == NULL) /* sanity check */ 960 return NULL; 961 962 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 963 if (table->id_driver == 0) 964 return NULL; 965 966 table++; 967 } 968 969 return table; 970} 971 972/* 973 * Return nonzero if a (masked) irq is pending for a given device. 974 */ 975int 976isa_irq_pending(dvp) 977 struct isa_device *dvp; 978{ 979 unsigned id_irq; 980 981 id_irq = dvp->id_irq; 982 if (id_irq & 0xff) 983 return (inb(IO_ICU1) & id_irq); 984 return (inb(IO_ICU2) & (id_irq >> 8)); 985} 986 987int 988update_intr_masks(void) 989{ 990 int intr, n=0; 991 u_int mask,*maskptr; 992 993 for (intr=0; intr < ICU_LEN; intr ++) { 994 if (intr==2) continue; 995 maskptr = intr_mptr[intr]; 996 if (!maskptr) continue; 997 *maskptr |= 1 << intr; 998 mask = *maskptr; 999 if (mask != intr_mask[intr]) { 1000#if 0 1001 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 1002 intr, intr_mask[intr], mask, maskptr); 1003#endif 1004 intr_mask[intr]=mask; 1005 n++; 1006 } 1007 1008 } 1009 return (n); 1010} 1011 1012int 1013register_intr(intr, device_id, flags, handler, maskptr, unit) 1014 int intr; 1015 int device_id; 1016 u_int flags; 1017 inthand2_t *handler; 1018 u_int *maskptr; 1019 int unit; 1020{ 1021 char *cp; 1022 u_long ef; 1023 int id; 1024 u_int mask = (maskptr ? *maskptr : 0); 1025 1026 if ((u_int)intr >= ICU_LEN || intr == 2 1027 || (u_int)device_id >= NR_DEVICES) 1028 return (EINVAL); 1029 if (intr_handler[intr] != isa_strayintr) 1030 return (EBUSY); 1031 ef = read_eflags(); 1032 disable_intr(); 1033 intr_countp[intr] = &intrcnt[device_id]; 1034 intr_handler[intr] = handler; 1035 intr_mptr[intr] = maskptr; 1036 intr_mask[intr] = mask | (1 << intr); 1037 intr_unit[intr] = unit; 1038 setidt(ICU_OFFSET + intr, 1039 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1040 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1041 write_eflags(ef); 1042 for (cp = intrnames, id = 0; id <= device_id; id++) 1043 while (*cp++ != '\0') 1044 ; 1045 if (cp > eintrnames) 1046 return (0); 1047 if (intr < 10) { 1048 cp[-3] = intr + '0'; 1049 cp[-2] = ' '; 1050 } else { 1051 cp[-3] = '1'; 1052 cp[-2] = intr - 10 + '0'; 1053 } 1054 return (0); 1055} 1056 1057static void 1058register_imask(dvp, mask) 1059 struct isa_device *dvp; 1060 u_int mask; 1061{ 1062 if (dvp->id_alive && dvp->id_irq) { 1063 int intr; 1064 1065 intr = ffs(dvp->id_irq) - 1; 1066 intr_mask[intr] = mask | (1 <<intr); 1067 } 1068 (void) update_intr_masks(); 1069} 1070 1071int 1072unregister_intr(intr, handler) 1073 int intr; 1074 inthand2_t *handler; 1075{ 1076 u_long ef; 1077 1078 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1079 return (EINVAL); 1080 ef = read_eflags(); 1081 disable_intr(); 1082 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1083 intr_handler[intr] = isa_strayintr; 1084 intr_mptr[intr] = NULL; 1085 intr_mask[intr] = HWI_MASK | SWI_MASK; 1086 intr_unit[intr] = intr; 1087 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, 1088 GSEL(GCODE_SEL, SEL_KPL)); 1089 write_eflags(ef); 1090 return (0); 1091} 1092