isa.c revision 8014
1169689Skan/*- 2169689Skan * Copyright (c) 1991 The Regents of the University of California. 3169689Skan * All rights reserved. 4169689Skan * 5169689Skan * This code is derived from software contributed to Berkeley by 6169689Skan * William Jolitz. 7169689Skan * 8169689Skan * Redistribution and use in source and binary forms, with or without 9169689Skan * modification, are permitted provided that the following conditions 10169689Skan * are met: 11169689Skan * 1. Redistributions of source code must retain the above copyright 12169689Skan * notice, this list of conditions and the following disclaimer. 13169689Skan * 2. Redistributions in binary form must reproduce the above copyright 14169689Skan * notice, this list of conditions and the following disclaimer in the 15169689Skan * documentation and/or other materials provided with the distribution. 16169689Skan * 3. All advertising materials mentioning features or use of this software 17169689Skan * must display the following acknowledgement: 18169689Skan * This product includes software developed by the University of 19169689Skan * California, Berkeley and its contributors. 20169689Skan * 4. Neither the name of the University nor the names of its contributors 21169689Skan * may be used to endorse or promote products derived from this software 22169689Skan * without specific prior written permission. 23169689Skan * 24169689Skan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25169689Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26169689Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27169689Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28169689Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29169689Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30169689Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31169689Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32169689Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33169689Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34169689Skan * SUCH DAMAGE. 35169689Skan * 36169689Skan * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 37169689Skan * $Id: isa.c,v 1.45 1995/04/12 20:47:54 wollman Exp $ 38169689Skan */ 39169689Skan 40169689Skan/* 41169689Skan * code to manage AT bus 42169689Skan * 43169689Skan * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44169689Skan * Fixed uninitialized variable problem and added code to deal 45169689Skan * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46169689Skan * mode DMA count compution and reorganized DMA setup code in 47169689Skan * isa_dmastart() 48169689Skan */ 49169689Skan 50169689Skan#include <sys/param.h> 51169689Skan#include <sys/systm.h> /* isn't it a joy */ 52169689Skan#include <sys/kernel.h> /* to have three of these */ 53169689Skan#include <sys/proc.h> 54169689Skan#include <sys/conf.h> 55169689Skan#include <sys/file.h> 56169689Skan#include <sys/buf.h> 57169689Skan#include <sys/uio.h> 58169689Skan#include <sys/syslog.h> 59169689Skan#include <sys/malloc.h> 60169689Skan#include <sys/rlist.h> 61169689Skan#include <machine/segments.h> 62169689Skan#include <vm/vm.h> 63169689Skan#include <machine/spl.h> 64169689Skan#include <i386/isa/isa_device.h> 65169689Skan#include <i386/isa/isa.h> 66169689Skan#include <i386/isa/icu.h> 67169689Skan#include <i386/isa/ic/i8237.h> 68169689Skan#include <i386/isa/ic/i8042.h> 69169689Skan#include <sys/devconf.h> 70169689Skan#include "vector.h" 71169689Skan 72169689Skan/* 73169689Skan** Register definitions for DMA controller 1 (channels 0..3): 74169689Skan*/ 75169689Skan#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 76169689Skan#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 77169689Skan#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 78169689Skan#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 79169689Skan 80169689Skan/* 81169689Skan** Register definitions for DMA controller 2 (channels 4..7): 82169689Skan*/ 83169689Skan#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 84169689Skan#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 85169689Skan#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 86169689Skan#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 87169689Skan 88169689Skan/* 89169689Skan * XXX these defines should be in a central place. 90169689Skan */ 91169689Skan#define read_eflags() ({u_long ef; \ 92169689Skan __asm("pushfl; popl %0" : "=a" (ef)); \ 93169689Skan ef; }) 94169689Skan#define write_eflags(ef) __asm("pushl %0; popfl" : : "a" ((u_long)(ef))) 95169689Skan 96169689Skanu_long *intr_countp[ICU_LEN]; 97169689Skaninthand2_t *intr_handler[ICU_LEN]; 98169689Skanu_int intr_mask[ICU_LEN]; 99169689Skanu_int* intr_mptr[ICU_LEN]; 100169689Skanint intr_unit[ICU_LEN]; 101169689Skan 102169689Skanextern struct kern_devconf kdc_cpu0; 103169689Skan 104169689Skanstruct kern_devconf kdc_isa0 = { 105169689Skan 0, 0, 0, /* filled in by dev_attach */ 106169689Skan "isa", 0, { MDDT_BUS, 0 }, 107169689Skan 0, 0, 0, BUS_EXTERNALLEN, 108169689Skan &kdc_cpu0, /* parent is the CPU */ 109169689Skan 0, /* no parentdata */ 110169689Skan DC_BUSY, /* busses are always busy */ 111169689Skan "ISA or EISA bus", 112169689Skan DC_CLS_BUS /* class */ 113169689Skan}; 114169689Skan 115169689Skanstatic inthand_t *fastintr[ICU_LEN] = { 116169689Skan &IDTVEC(fastintr0), &IDTVEC(fastintr1), 117169689Skan &IDTVEC(fastintr2), &IDTVEC(fastintr3), 118169689Skan &IDTVEC(fastintr4), &IDTVEC(fastintr5), 119169689Skan &IDTVEC(fastintr6), &IDTVEC(fastintr7), 120169689Skan &IDTVEC(fastintr8), &IDTVEC(fastintr9), 121169689Skan &IDTVEC(fastintr10), &IDTVEC(fastintr11), 122169689Skan &IDTVEC(fastintr12), &IDTVEC(fastintr13), 123169689Skan &IDTVEC(fastintr14), &IDTVEC(fastintr15) 124169689Skan}; 125169689Skan 126169689Skanstatic inthand_t *slowintr[ICU_LEN] = { 127169689Skan &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 128169689Skan &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 129169689Skan &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 130169689Skan &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 131169689Skan}; 132169689Skan 133169689Skanstatic void config_isadev __P((struct isa_device *isdp, u_int *mp)); 134169689Skanstatic void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 135169689Skan int reconfig)); 136169689Skanstatic void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 137169689Skan int item, char const *whatnot, char const *reason, 138169689Skan char const *format)); 139169689Skanstatic int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 140169689Skan u_int checkbits)); 141169689Skanstatic inthand2_t isa_strayintr; 142169689Skanstatic void register_imask __P((struct isa_device *dvp, u_int mask)); 143169689Skan 144169689Skan/* 145169689Skan * print a conflict message 146169689Skan */ 147169689Skanstatic void 148169689Skanconflict(dvp, tmpdvp, item, whatnot, reason, format) 149169689Skan struct isa_device *dvp; 150169689Skan struct isa_device *tmpdvp; 151169689Skan int item; 152169689Skan char const *whatnot; 153169689Skan char const *reason; 154169689Skan char const *format; 155169689Skan{ 156169689Skan printf("%s%d not %sed due to %s conflict with %s%d at ", 157169689Skan dvp->id_driver->name, dvp->id_unit, whatnot, reason, 158169689Skan tmpdvp->id_driver->name, tmpdvp->id_unit); 159169689Skan printf(format, item); 160169689Skan printf("\n"); 161169689Skan} 162169689Skan 163169689Skan/* 164169689Skan * Check to see if things are alread in use, like IRQ's, I/O addresses 165169689Skan * and Memory addresses. 166 */ 167static int 168haveseen(dvp, tmpdvp, checkbits) 169 struct isa_device *dvp; 170 struct isa_device *tmpdvp; 171 u_int checkbits; 172{ 173 /* 174 * Only check against devices that have already been found 175 */ 176 if (tmpdvp->id_alive) { 177 char const *whatnot; 178 179 whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 180 /* 181 * Check for I/O address conflict. We can only check the 182 * starting address of the device against the range of the 183 * device that has already been probed since we do not 184 * know how many I/O addresses this device uses. 185 */ 186 if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 187 if ((dvp->id_iobase >= tmpdvp->id_iobase) && 188 (dvp->id_iobase <= 189 (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 190 conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 191 "I/O address", "0x%x"); 192 return 1; 193 } 194 } 195 /* 196 * Check for Memory address conflict. We can check for 197 * range overlap, but it will not catch all cases since the 198 * driver may adjust the msize paramater during probe, for 199 * now we just check that the starting address does not 200 * fall within any allocated region. 201 * XXX could add a second check after the probe for overlap, 202 * since at that time we would know the full range. 203 * XXX KERNBASE is a hack, we should have vaddr in the table! 204 */ 205 if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 206 if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 207 (KERNBASE + dvp->id_maddr <= 208 (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 209 conflict(dvp, tmpdvp, (int)dvp->id_maddr, 210 whatnot, "maddr", "0x%x"); 211 return 1; 212 } 213 } 214 /* 215 * Check for IRQ conflicts. 216 */ 217 if (checkbits & CC_IRQ && tmpdvp->id_irq) { 218 if (tmpdvp->id_irq == dvp->id_irq) { 219 conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 220 whatnot, "irq", "%d"); 221 return 1; 222 } 223 } 224 /* 225 * Check for DRQ conflicts. 226 */ 227 if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 228 if (tmpdvp->id_drq == dvp->id_drq) { 229 conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 230 "drq", "%d"); 231 return 1; 232 } 233 } 234 } 235 return 0; 236} 237 238/* 239 * Search through all the isa_devtab_* tables looking for anything that 240 * conflicts with the current device. 241 */ 242#include "eisa.h" 243#if NEISA > 0 244extern struct isa_device isa_devtab_eisa[]; 245#endif 246 247int 248haveseen_isadev(dvp, checkbits) 249 struct isa_device *dvp; 250 u_int checkbits; 251{ 252 struct isa_device *tmpdvp; 253 int status = 0; 254 255 for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 256 status |= haveseen(dvp, tmpdvp, checkbits); 257 if (status) 258 return status; 259 } 260 for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 261 status |= haveseen(dvp, tmpdvp, checkbits); 262 if (status) 263 return status; 264 } 265 for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 266 status |= haveseen(dvp, tmpdvp, checkbits); 267 if (status) 268 return status; 269 } 270 for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 271 status |= haveseen(dvp, tmpdvp, checkbits); 272 if (status) 273 return status; 274 } 275#if NEISA > 0 276 for (tmpdvp = isa_devtab_eisa; tmpdvp->id_driver; tmpdvp++) { 277 status |= haveseen(dvp, tmpdvp, checkbits); 278 if (status) 279 return status; 280 } 281#endif 282 return(status); 283} 284 285/* 286 * Configure all ISA devices 287 */ 288void 289isa_configure() { 290 struct isa_device *dvp; 291 292 dev_attach(&kdc_isa0); 293 294 splhigh(); 295 enable_intr(); 296 INTREN(IRQ_SLAVE); 297 printf("Probing for devices on the ISA bus:\n"); 298 /* First probe all the sensitive probes */ 299 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 300 if (dvp->id_driver->sensitive_hw) 301 config_isadev(dvp, &tty_imask); 302 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 303 if (dvp->id_driver->sensitive_hw) 304 config_isadev(dvp, &bio_imask); 305 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 306 if (dvp->id_driver->sensitive_hw) 307 config_isadev(dvp, &net_imask); 308 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 309 if (dvp->id_driver->sensitive_hw) 310 config_isadev(dvp, (u_int *)NULL); 311 312 /* Then all the bad ones */ 313 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 314 if (!dvp->id_driver->sensitive_hw) 315 config_isadev(dvp, &tty_imask); 316 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 317 if (!dvp->id_driver->sensitive_hw) 318 config_isadev(dvp, &bio_imask); 319 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 320 if (!dvp->id_driver->sensitive_hw) 321 config_isadev(dvp, &net_imask); 322 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 323 if (!dvp->id_driver->sensitive_hw) 324 config_isadev(dvp, (u_int *)NULL); 325 326 bio_imask |= SWI_CLOCK_MASK; 327 net_imask |= SWI_NET_MASK; 328 tty_imask |= SWI_TTY_MASK; 329 330/* 331 * XXX we should really add the tty device to net_imask when the line is 332 * switched to SLIPDISC, and then remove it when it is switched away from 333 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 334 * of them is running slip. 335 * 336 * XXX actually, blocking all ttys during a splimp doesn't matter so much 337 * with sio because the serial interrupt layer doesn't use tty_imask. Only 338 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 339 * during spltty. 340 */ 341#include "sl.h" 342#include "ppp.h" 343 344#if (NSL > 0) || (NPPP > 0) 345 net_imask |= tty_imask; 346 tty_imask = net_imask; 347#endif 348 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 349#ifdef DIAGNOSTIC 350 printf("bio_imask %x tty_imask %x net_imask %x\n", 351 bio_imask, tty_imask, net_imask); 352#endif 353 /* 354 * Finish initializing intr_mask[]. Note that the partly 355 * constructed masks aren't actually used since we're at splhigh. 356 * For fully dynamic initialization, register_intr() and 357 * unregister_intr() will have to adjust the masks for _all_ 358 * interrupts and for tty_imask, etc. 359 */ 360 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 361 register_imask(dvp, tty_imask); 362 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 363 register_imask(dvp, bio_imask); 364 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 365 register_imask(dvp, net_imask); 366 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 367 register_imask(dvp, SWI_CLOCK_MASK); 368 spl0(); 369} 370 371/* 372 * Configure an ISA device. 373 */ 374 375 376static void 377config_isadev(isdp, mp) 378 struct isa_device *isdp; 379 u_int *mp; 380{ 381 config_isadev_c(isdp, mp, 0); 382} 383 384void 385reconfig_isadev(isdp, mp) 386 struct isa_device *isdp; 387 u_int *mp; 388{ 389 config_isadev_c(isdp, mp, 1); 390} 391 392static void 393config_isadev_c(isdp, mp, reconfig) 394 struct isa_device *isdp; 395 u_int *mp; 396 int reconfig; 397{ 398 u_int checkbits; 399 int id_alive; 400 int last_alive; 401 struct isa_driver *dp = isdp->id_driver; 402 403 checkbits = 0; 404#ifndef ALLOW_CONFLICT_DRQ 405 checkbits |= CC_DRQ; 406#endif 407#ifndef ALLOW_CONFLICT_IOADDR 408 checkbits |= CC_IOADDR; 409#endif 410#ifndef ALLOW_CONFLICT_MEMADDR 411 checkbits |= CC_MEMADDR; 412#endif 413 if (!isdp->id_enabled) { 414 printf("%s%d: disabled, not probed.\n", 415 dp->name, isdp->id_unit); 416 return; 417 } 418 if (!reconfig && haveseen_isadev(isdp, checkbits)) 419 return; 420 if (!reconfig && isdp->id_maddr) { 421 isdp->id_maddr -= 0xa0000; /* XXX should be a define */ 422 isdp->id_maddr += atdevbase; 423 } 424 if (reconfig) { 425 last_alive = isdp->id_alive; 426 isdp->id_reconfig = 1; 427 } 428 else { 429 last_alive = 0; 430 isdp->id_reconfig = 0; 431 } 432 id_alive = (*dp->probe)(isdp); 433 if (id_alive) { 434 /* 435 * Only print the I/O address range if id_alive != -1 436 * Right now this is a temporary fix just for the new 437 * NPX code so that if it finds a 486 that can use trap 438 * 16 it will not report I/O addresses. 439 * Rod Grimes 04/26/94 440 */ 441 if (!isdp->id_reconfig) { 442 printf("%s%d", dp->name, isdp->id_unit); 443 if (id_alive != -1) { 444 printf(" at 0x%x", isdp->id_iobase); 445 if ((isdp->id_iobase + id_alive - 1) != 446 isdp->id_iobase) { 447 printf("-0x%x", 448 isdp->id_iobase + id_alive - 1); 449 } 450 } 451 if (isdp->id_irq) 452 printf(" irq %d", ffs(isdp->id_irq) - 1); 453 if (isdp->id_drq != -1) 454 printf(" drq %d", isdp->id_drq); 455 if (isdp->id_maddr) 456 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 457 if (isdp->id_msize) 458 printf(" msize %d", isdp->id_msize); 459 if (isdp->id_flags) 460 printf(" flags 0x%x", isdp->id_flags); 461 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 462 printf(" on motherboard"); 463 } else if (isdp->id_iobase >= 0x1000 && 464 !(isdp->id_iobase & 0x300)) { 465 printf (" on eisa slot %d", 466 isdp->id_iobase >> 12); 467 } else { 468 printf (" on isa"); 469 } 470 printf("\n"); 471 /* 472 * Check for conflicts again. The driver may have 473 * changed *dvp. We should weaken the early check 474 * since the driver may have been able to change 475 * *dvp to avoid conflicts if given a chance. We 476 * already skip the early check for IRQs and force 477 * a check for IRQs in the next group of checks. 478 */ 479#ifndef ALLOW_CONFLICT_IRQ 480 checkbits |= CC_IRQ; 481#endif 482 if (haveseen_isadev(isdp, checkbits)) 483 return; 484 isdp->id_alive = id_alive; 485 } 486 (*dp->attach)(isdp); 487 if (isdp->id_irq) { 488 if (mp) 489 INTRMASK(*mp, isdp->id_irq); 490 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 491 isdp->id_ri_flags, isdp->id_intr, 492 mp, isdp->id_unit); 493 INTREN(isdp->id_irq); 494 } 495 } else { 496 if (isdp->id_reconfig) { 497 (*dp->attach)(isdp); /* reconfiguration attach */ 498 } 499 if (!last_alive) { 500 if (!isdp->id_reconfig) { 501 printf("%s%d not found", dp->name, isdp->id_unit); 502 if (isdp->id_iobase) { 503 printf(" at 0x%x", isdp->id_iobase); 504 } 505 printf("\n"); 506 } 507 } 508 else { 509 /* This code has not been tested.... */ 510 if (isdp->id_irq) { 511 INTRDIS(isdp->id_irq); 512 unregister_intr(ffs(isdp->id_irq) - 1, 513 isdp->id_intr); 514 if (mp) 515 INTRUNMASK(*mp, isdp->id_irq); 516 } 517 } 518 } 519} 520 521/* 522 * Provide ISA-specific device information to user programs using the 523 * hw.devconf interface. 524 */ 525int 526isa_externalize(struct isa_device *id, void *userp, size_t *maxlen) 527{ 528 if(*maxlen < sizeof *id) { 529 return ENOMEM; 530 } 531 532 *maxlen -= sizeof *id; 533 return copyout(id, userp, sizeof *id); 534} 535 536/* 537 * Do the same thing for EISA information. EISA information is currently 538 * the same as ISA information plus a slot number, but could be extended in 539 * the future. 540 */ 541int 542eisa_externalize(struct isa_device *id, int slot, void *userp, size_t *maxlen) 543{ 544 int rv; 545 546 if(*maxlen < (sizeof *id) + (sizeof slot)) { 547 return ENOMEM; 548 } 549 *maxlen -= (sizeof *id) + (sizeof slot); 550 551 rv = copyout(id, userp, sizeof *id); 552 if(rv) return rv; 553 554 return copyout(&slot, (char *)userp + sizeof *id, sizeof slot); 555} 556 557/* 558 * This is used to forcibly reconfigure an ISA device. It currently just 559 * returns an error 'cos you can't do that yet. It is here to demonstrate 560 * what the `internalize' routine is supposed to do. 561 */ 562int 563isa_internalize(struct isa_device *id, void **userpp, size_t *len) 564{ 565 struct isa_device myid; 566 char *userp = *userpp; 567 int rv; 568 569 if(*len < sizeof *id) { 570 return EINVAL; 571 } 572 573 rv = copyin(userp, &myid, sizeof myid); 574 if(rv) return rv; 575 *userpp = userp + sizeof myid; 576 *len -= sizeof myid; 577 578 rv = EOPNOTSUPP; 579 /* code would go here to validate the configuration request */ 580 /* code would go here to actually perform the reconfiguration */ 581 return rv; 582} 583 584int 585isa_generic_externalize(struct proc *p, struct kern_devconf *kdc, 586 void *userp, size_t l) 587{ 588 return isa_externalize(kdc->kdc_isa, userp, &l); 589} 590 591int 592eisa_generic_externalize(struct proc *p, struct kern_devconf *kdc, 593 void *userp, size_t l) 594{ 595 return eisa_externalize(kdc->kdc_isa, -1, userp, &l); 596} 597 598/* 599 * Fill in default interrupt table (in case of spuruious interrupt 600 * during configuration of kernel, setup interrupt control unit 601 */ 602void 603isa_defaultirq() 604{ 605 int i; 606 607 /* icu vectors */ 608 for (i = 0; i < ICU_LEN; i++) 609 unregister_intr(i, (inthand2_t *)NULL); 610 611 /* initialize 8259's */ 612 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 613 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 614 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 615#ifdef AUTO_EOI_1 616 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 617#else 618 outb(IO_ICU1+1, 1); /* 8086 mode */ 619#endif 620 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 621 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 622 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 623 624 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 625 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 626 outb(IO_ICU2+1,2); /* my slave id is 2 */ 627#ifdef AUTO_EOI_2 628 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 629#else 630 outb(IO_ICU2+1,1); /* 8086 mode */ 631#endif 632 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 633 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 634} 635 636/* region of physical memory known to be contiguous */ 637vm_offset_t isaphysmem; 638static caddr_t dma_bounce[8]; /* XXX */ 639static char bounced[8]; /* XXX */ 640#define MAXDMASZ 512 /* XXX */ 641 642/* high byte of address is stored in this port for i-th dma channel */ 643static short dmapageport[8] = 644 { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 645 646/* 647 * isa_dmacascade(): program 8237 DMA controller channel to accept 648 * external dma control by a board. 649 */ 650void isa_dmacascade(unsigned chan) 651{ 652 if (chan > 7) 653 panic("isa_dmacascade: impossible request"); 654 655 /* set dma channel mode, and set dma channel mode */ 656 if ((chan & 4) == 0) { 657 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 658 outb(DMA1_SMSK, chan); 659 } else { 660 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 661 outb(DMA2_SMSK, chan & 3); 662 } 663} 664 665static int 666isa_dmarangecheck(caddr_t va, unsigned length, unsigned chan); 667 668/* 669 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 670 * problems by using a bounce buffer. 671 */ 672void isa_dmastart(int flags, caddr_t addr, unsigned nbytes, unsigned chan) 673{ vm_offset_t phys; 674 int waport; 675 caddr_t newaddr; 676 677 if ( chan > 7 678 || (chan < 4 && nbytes > (1<<16)) 679 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 680 panic("isa_dmastart: impossible request"); 681 682 if (isa_dmarangecheck(addr, nbytes, chan)) { 683 if (dma_bounce[chan] == 0) 684 dma_bounce[chan] = 685 /*(caddr_t)malloc(MAXDMASZ, M_TEMP, M_WAITOK);*/ 686 (caddr_t) isaphysmem + NBPG*chan; 687 bounced[chan] = 1; 688 newaddr = dma_bounce[chan]; 689 *(int *) newaddr = 0; /* XXX */ 690 691 /* copy bounce buffer on write */ 692 if (!(flags & B_READ)) 693 bcopy(addr, newaddr, nbytes); 694 addr = newaddr; 695 } 696 697 /* translate to physical */ 698 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 699 700 if ((chan & 4) == 0) { 701 /* 702 * Program one of DMA channels 0..3. These are 703 * byte mode channels. 704 */ 705 /* set dma channel mode, and reset address ff */ 706 707 /* If B_RAW flag is set, then use autoinitialise mode */ 708 if (flags & B_RAW) { 709 if (flags & B_READ) 710 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 711 else 712 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 713 } 714 else 715 if (flags & B_READ) 716 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 717 else 718 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 719 outb(DMA1_FFC, 0); 720 721 /* send start address */ 722 waport = DMA1_CHN(chan); 723 outb(waport, phys); 724 outb(waport, phys>>8); 725 outb(dmapageport[chan], phys>>16); 726 727 /* send count */ 728 outb(waport + 1, --nbytes); 729 outb(waport + 1, nbytes>>8); 730 731 /* unmask channel */ 732 outb(DMA1_SMSK, chan); 733 } else { 734 /* 735 * Program one of DMA channels 4..7. These are 736 * word mode channels. 737 */ 738 /* set dma channel mode, and reset address ff */ 739 740 /* If B_RAW flag is set, then use autoinitialise mode */ 741 if (flags & B_RAW) { 742 if (flags & B_READ) 743 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 744 else 745 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 746 } 747 else 748 if (flags & B_READ) 749 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 750 else 751 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 752 outb(DMA2_FFC, 0); 753 754 /* send start address */ 755 waport = DMA2_CHN(chan - 4); 756 outb(waport, phys>>1); 757 outb(waport, phys>>9); 758 outb(dmapageport[chan], phys>>16); 759 760 /* send count */ 761 nbytes >>= 1; 762 outb(waport + 2, --nbytes); 763 outb(waport + 2, nbytes>>8); 764 765 /* unmask channel */ 766 outb(DMA2_SMSK, chan & 3); 767 } 768} 769 770void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 771{ 772 773 /* copy bounce buffer on read */ 774 /*if ((flags & (B_PHYS|B_READ)) == (B_PHYS|B_READ))*/ 775 if (bounced[chan]) { 776 bcopy(dma_bounce[chan], addr, nbytes); 777 bounced[chan] = 0; 778 } 779} 780 781/* 782 * Check for problems with the address range of a DMA transfer 783 * (non-contiguous physical pages, outside of bus address space, 784 * crossing DMA page boundaries). 785 * Return true if special handling needed. 786 */ 787 788static int 789isa_dmarangecheck(caddr_t va, unsigned length, unsigned chan) { 790 vm_offset_t phys, priorpage = 0, endva; 791 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 792 793 endva = (vm_offset_t)round_page(va + length); 794 for (; va < (caddr_t) endva ; va += NBPG) { 795 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 796#define ISARAM_END RAM_END 797 if (phys == 0) 798 panic("isa_dmacheck: no physical page present"); 799 if (phys >= ISARAM_END) 800 return (1); 801 if (priorpage) { 802 if (priorpage + NBPG != phys) 803 return (1); 804 /* check if crossing a DMA page boundary */ 805 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 806 return (1); 807 } 808 priorpage = phys; 809 } 810 return (0); 811} 812 813/* head of queue waiting for physmem to become available */ 814struct buf isa_physmemq; 815 816/* blocked waiting for resource to become free for exclusive use */ 817static isaphysmemflag; 818/* if waited for and call requested when free (B_CALL) */ 819static void (*isaphysmemunblock)(); /* needs to be a list */ 820 821/* 822 * Allocate contiguous physical memory for transfer, returning 823 * a *virtual* address to region. May block waiting for resource. 824 * (assumed to be called at splbio()) 825 */ 826caddr_t 827isa_allocphysmem(caddr_t va, unsigned length, void (*func)()) { 828 829 isaphysmemunblock = func; 830 while (isaphysmemflag & B_BUSY) { 831 isaphysmemflag |= B_WANTED; 832 tsleep((caddr_t)&isaphysmemflag, PRIBIO, "isaphys", 0); 833 } 834 isaphysmemflag |= B_BUSY; 835 836 return((caddr_t)isaphysmem); 837} 838 839/* 840 * Free contiguous physical memory used for transfer. 841 * (assumed to be called at splbio()) 842 */ 843void 844isa_freephysmem(caddr_t va, unsigned length) { 845 846 isaphysmemflag &= ~B_BUSY; 847 if (isaphysmemflag & B_WANTED) { 848 isaphysmemflag &= B_WANTED; 849 wakeup((caddr_t)&isaphysmemflag); 850 if (isaphysmemunblock) 851 (*isaphysmemunblock)(); 852 } 853} 854 855#define NMI_PARITY (1 << 7) 856#define NMI_IOCHAN (1 << 6) 857#define ENMI_WATCHDOG (1 << 7) 858#define ENMI_BUSTIMER (1 << 6) 859#define ENMI_IOSTATUS (1 << 5) 860 861/* 862 * Handle a NMI, possibly a machine check. 863 * return true to panic system, false to ignore. 864 */ 865int 866isa_nmi(cd) 867 int cd; 868{ 869 int isa_port = inb(0x61); 870 int eisa_port = inb(0x461); 871 if(isa_port & NMI_PARITY) { 872 panic("RAM parity error, likely hardware failure."); 873 } else if(isa_port & NMI_IOCHAN) { 874 panic("I/O channel check, likely hardware failure."); 875 } else if(eisa_port & ENMI_WATCHDOG) { 876 panic("EISA watchdog timer expired, likely hardware failure."); 877 } else if(eisa_port & ENMI_BUSTIMER) { 878 panic("EISA bus timeout, likely hardware failure."); 879 } else if(eisa_port & ENMI_IOSTATUS) { 880 panic("EISA I/O port status error."); 881 } else { 882 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 883 return(0); 884 } 885} 886 887/* 888 * Caught a stray interrupt, notify 889 */ 890static void 891isa_strayintr(d) 892 int d; 893{ 894 895 /* DON'T BOTHER FOR NOW! */ 896 /* for some reason, we get bursts of intr #7, even if not enabled! */ 897 /* 898 * Well the reason you got bursts of intr #7 is because someone 899 * raised an interrupt line and dropped it before the 8259 could 900 * prioritize it. This is documented in the intel data book. This 901 * means you have BAD hardware! I have changed this so that only 902 * the first 5 get logged, then it quits logging them, and puts 903 * out a special message. rgrimes 3/25/1993 904 */ 905 /* 906 * XXX TODO print a different message for #7 if it is for a 907 * glitch. Glitches can be distinguished from real #7's by 908 * testing that the in-service bit is _not_ set. The test 909 * must be done before sending an EOI so it can't be done if 910 * we are using AUTO_EOI_1. 911 */ 912 if (intrcnt[NR_DEVICES + d] <= 5) 913 log(LOG_ERR, "stray irq %d\n", d); 914 if (intrcnt[NR_DEVICES + d] == 5) 915 log(LOG_CRIT, 916 "too many stray irq %d's; not logging any more\n", d); 917} 918 919/* 920 * find an ISA device in a given isa_devtab_* table, given 921 * the table to search, the expected id_driver entry, and the unit number. 922 * 923 * this function is defined in isa_device.h, and this location is debatable; 924 * i put it there because it's useless w/o, and directly operates on 925 * the other stuff in that file. 926 * 927 */ 928 929struct isa_device *find_isadev(table, driverp, unit) 930 struct isa_device *table; 931 struct isa_driver *driverp; 932 int unit; 933{ 934 if (driverp == NULL) /* sanity check */ 935 return NULL; 936 937 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 938 if (table->id_driver == 0) 939 return NULL; 940 941 table++; 942 } 943 944 return table; 945} 946 947/* 948 * Return nonzero if a (masked) irq is pending for a given device. 949 */ 950int 951isa_irq_pending(dvp) 952 struct isa_device *dvp; 953{ 954 unsigned id_irq; 955 956 id_irq = dvp->id_irq; 957 if (id_irq & 0xff) 958 return (inb(IO_ICU1) & id_irq); 959 return (inb(IO_ICU2) & (id_irq >> 8)); 960} 961 962int 963update_intr_masks(void) 964{ 965 int intr, n=0; 966 u_int mask,*maskptr; 967 for (intr=0; intr < ICU_LEN; intr ++) { 968 if (intr==2) continue; 969 maskptr = intr_mptr[intr]; 970 if (!maskptr) continue; 971 mask = *maskptr; 972 if (mask != intr_mask[intr]) { 973#if 0 974 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 975 intr, intr_mask[intr], mask, maskptr); 976#endif 977 intr_mask[intr]=mask; 978 n++; 979 } 980 981 } 982 return (n); 983} 984 985int 986register_intr(intr, device_id, flags, handler, maskptr, unit) 987 int intr; 988 int device_id; 989 u_int flags; 990 inthand2_t *handler; 991 u_int *maskptr; 992 int unit; 993{ 994 char *cp; 995 u_long ef; 996 int id; 997 u_int mask = (maskptr ? *maskptr : 0); 998 999 if ((u_int)intr >= ICU_LEN || intr == 2 1000 || (u_int)device_id >= NR_DEVICES) 1001 return (EINVAL); 1002 if (intr_handler[intr] != isa_strayintr) 1003 return (EBUSY); 1004 ef = read_eflags(); 1005 disable_intr(); 1006 intr_countp[intr] = &intrcnt[device_id]; 1007 intr_handler[intr] = handler; 1008 intr_mptr[intr] = maskptr; 1009 intr_mask[intr] = mask | (1 << intr); 1010 intr_unit[intr] = unit; 1011 setidt(ICU_OFFSET + intr, 1012 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1013 SDT_SYS386IGT, SEL_KPL); 1014 write_eflags(ef); 1015 for (cp = intrnames, id = 0; id <= device_id; id++) 1016 while (*cp++ != '\0') 1017 ; 1018 if (cp > eintrnames) 1019 return (0); 1020 if (intr < 10) { 1021 cp[-3] = intr + '0'; 1022 cp[-2] = ' '; 1023 } else { 1024 cp[-3] = '1'; 1025 cp[-2] = intr - 10 + '0'; 1026 } 1027 return (0); 1028} 1029 1030static void 1031register_imask(dvp, mask) 1032 struct isa_device *dvp; 1033 u_int mask; 1034{ 1035 if (dvp->id_alive && dvp->id_irq) { 1036 int intr; 1037 1038 intr = ffs(dvp->id_irq) - 1; 1039 intr_mask[intr] = mask | (1 <<intr); 1040 } 1041 (void) update_intr_masks(); 1042} 1043 1044int 1045unregister_intr(intr, handler) 1046 int intr; 1047 inthand2_t *handler; 1048{ 1049 u_long ef; 1050 1051 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1052 return (EINVAL); 1053 ef = read_eflags(); 1054 disable_intr(); 1055 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1056 intr_handler[intr] = isa_strayintr; 1057 intr_mptr[intr] = NULL; 1058 intr_mask[intr] = HWI_MASK | SWI_MASK; 1059 intr_unit[intr] = intr; 1060 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL); 1061 write_eflags(ef); 1062 return (0); 1063} 1064