isa.c revision 24334
1235368Sgnn/*- 2235368Sgnn * Copyright (c) 1991 The Regents of the University of California. 3235368Sgnn * 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 1.79 1997/03/25 03:29:40 ache 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/md_var.h> 58#include <machine/segments.h> 59#include <vm/vm.h> 60#include <vm/vm_param.h> 61#include <vm/pmap.h> 62#include <i386/isa/isa_device.h> 63#include <i386/isa/isa.h> 64#include <i386/isa/icu.h> 65#include <i386/isa/ic/i8237.h> 66#include "vector.h" 67 68/* 69** Register definitions for DMA controller 1 (channels 0..3): 70*/ 71#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 72#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 73#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 74#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 75 76/* 77** Register definitions for DMA controller 2 (channels 4..7): 78*/ 79#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 80#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 81#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 82#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 83 84u_long *intr_countp[ICU_LEN]; 85inthand2_t *intr_handler[ICU_LEN]; 86u_int intr_mask[ICU_LEN]; 87u_int* intr_mptr[ICU_LEN]; 88int intr_unit[ICU_LEN]; 89 90static inthand_t *fastintr[ICU_LEN] = { 91 &IDTVEC(fastintr0), &IDTVEC(fastintr1), 92 &IDTVEC(fastintr2), &IDTVEC(fastintr3), 93 &IDTVEC(fastintr4), &IDTVEC(fastintr5), 94 &IDTVEC(fastintr6), &IDTVEC(fastintr7), 95 &IDTVEC(fastintr8), &IDTVEC(fastintr9), 96 &IDTVEC(fastintr10), &IDTVEC(fastintr11), 97 &IDTVEC(fastintr12), &IDTVEC(fastintr13), 98 &IDTVEC(fastintr14), &IDTVEC(fastintr15) 99}; 100 101static inthand_t *slowintr[ICU_LEN] = { 102 &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 103 &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 104 &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 105 &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 106}; 107 108static void config_isadev __P((struct isa_device *isdp, u_int *mp)); 109static void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 110 int reconfig)); 111static void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 112 int item, char const *whatnot, char const *reason, 113 char const *format)); 114static int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 115 u_int checkbits)); 116static int isa_dmarangecheck __P((caddr_t va, u_int length, int chan)); 117static inthand2_t isa_strayintr; 118static void register_imask __P((struct isa_device *dvp, u_int mask)); 119 120/* 121 * print a conflict message 122 */ 123static void 124conflict(dvp, tmpdvp, item, whatnot, reason, format) 125 struct isa_device *dvp; 126 struct isa_device *tmpdvp; 127 int item; 128 char const *whatnot; 129 char const *reason; 130 char const *format; 131{ 132 printf("%s%d not %sed due to %s conflict with %s%d at ", 133 dvp->id_driver->name, dvp->id_unit, whatnot, reason, 134 tmpdvp->id_driver->name, tmpdvp->id_unit); 135 printf(format, item); 136 printf("\n"); 137} 138 139/* 140 * Check to see if things are already in use, like IRQ's, I/O addresses 141 * and Memory addresses. 142 */ 143static int 144haveseen(dvp, tmpdvp, checkbits) 145 struct isa_device *dvp; 146 struct isa_device *tmpdvp; 147 u_int checkbits; 148{ 149 /* 150 * Only check against devices that have already been found and are not 151 * unilaterally allowed to conflict anyway. 152 */ 153 if (tmpdvp->id_alive && !dvp->id_conflicts) { 154 char const *whatnot; 155 156 whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 157 /* 158 * Check for I/O address conflict. We can only check the 159 * starting address of the device against the range of the 160 * device that has already been probed since we do not 161 * know how many I/O addresses this device uses. 162 */ 163 if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 164 if ((dvp->id_iobase >= tmpdvp->id_iobase) && 165 (dvp->id_iobase <= 166 (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 167 conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 168 "I/O address", "0x%x"); 169 return 1; 170 } 171 } 172 /* 173 * Check for Memory address conflict. We can check for 174 * range overlap, but it will not catch all cases since the 175 * driver may adjust the msize paramater during probe, for 176 * now we just check that the starting address does not 177 * fall within any allocated region. 178 * XXX could add a second check after the probe for overlap, 179 * since at that time we would know the full range. 180 * XXX KERNBASE is a hack, we should have vaddr in the table! 181 */ 182 if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 183 if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 184 (KERNBASE + dvp->id_maddr <= 185 (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 186 conflict(dvp, tmpdvp, (int)dvp->id_maddr, 187 whatnot, "maddr", "0x%x"); 188 return 1; 189 } 190 } 191 /* 192 * Check for IRQ conflicts. 193 */ 194 if (checkbits & CC_IRQ && tmpdvp->id_irq) { 195 if (tmpdvp->id_irq == dvp->id_irq) { 196 conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 197 whatnot, "irq", "%d"); 198 return 1; 199 } 200 } 201 /* 202 * Check for DRQ conflicts. 203 */ 204 if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 205 if (tmpdvp->id_drq == dvp->id_drq) { 206 conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 207 "drq", "%d"); 208 return 1; 209 } 210 } 211 } 212 return 0; 213} 214 215/* 216 * Search through all the isa_devtab_* tables looking for anything that 217 * conflicts with the current device. 218 */ 219int 220haveseen_isadev(dvp, checkbits) 221 struct isa_device *dvp; 222 u_int checkbits; 223{ 224 struct isa_device *tmpdvp; 225 int status = 0; 226 227 for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 228 status |= haveseen(dvp, tmpdvp, checkbits); 229 if (status) 230 return status; 231 } 232 for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 233 status |= haveseen(dvp, tmpdvp, checkbits); 234 if (status) 235 return status; 236 } 237 for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 238 status |= haveseen(dvp, tmpdvp, checkbits); 239 if (status) 240 return status; 241 } 242 for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 243 status |= haveseen(dvp, tmpdvp, checkbits); 244 if (status) 245 return status; 246 } 247 return(status); 248} 249 250/* 251 * Configure all ISA devices 252 */ 253void 254isa_configure() { 255 struct isa_device *dvp; 256 257 splhigh(); 258 printf("Probing for devices on the ISA bus:\n"); 259 /* First probe all the sensitive probes */ 260 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 261 if (dvp->id_driver->sensitive_hw) 262 config_isadev(dvp, &tty_imask); 263 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 264 if (dvp->id_driver->sensitive_hw) 265 config_isadev(dvp, &bio_imask); 266 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 267 if (dvp->id_driver->sensitive_hw) 268 config_isadev(dvp, &net_imask); 269 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 270 if (dvp->id_driver->sensitive_hw) 271 config_isadev(dvp, (u_int *)NULL); 272 273 /* Then all the bad ones */ 274 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 275 if (!dvp->id_driver->sensitive_hw) 276 config_isadev(dvp, &tty_imask); 277 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 278 if (!dvp->id_driver->sensitive_hw) 279 config_isadev(dvp, &bio_imask); 280 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 281 if (!dvp->id_driver->sensitive_hw) 282 config_isadev(dvp, &net_imask); 283 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 284 if (!dvp->id_driver->sensitive_hw) 285 config_isadev(dvp, (u_int *)NULL); 286 287 bio_imask |= SWI_CLOCK_MASK; 288 net_imask |= SWI_NET_MASK; 289 tty_imask |= SWI_TTY_MASK; 290 291/* 292 * XXX we should really add the tty device to net_imask when the line is 293 * switched to SLIPDISC, and then remove it when it is switched away from 294 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 295 * of them is running slip. 296 * 297 * XXX actually, blocking all ttys during a splimp doesn't matter so much 298 * with sio because the serial interrupt layer doesn't use tty_imask. Only 299 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 300 * during spltty. 301 */ 302#include "sl.h" 303#if NSL > 0 304 net_imask |= tty_imask; 305 tty_imask = net_imask; 306#endif 307 308 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 309 310 if (bootverbose) 311 printf("imasks: bio %x, tty %x, net %x\n", 312 bio_imask, tty_imask, net_imask); 313 314 /* 315 * Finish initializing intr_mask[]. Note that the partly 316 * constructed masks aren't actually used since we're at splhigh. 317 * For fully dynamic initialization, register_intr() and 318 * unregister_intr() will have to adjust the masks for _all_ 319 * interrupts and for tty_imask, etc. 320 */ 321 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 322 register_imask(dvp, tty_imask); 323 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 324 register_imask(dvp, bio_imask); 325 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 326 register_imask(dvp, net_imask); 327 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 328 register_imask(dvp, SWI_CLOCK_MASK); 329 spl0(); 330} 331 332/* 333 * Configure an ISA device. 334 */ 335 336 337static void 338config_isadev(isdp, mp) 339 struct isa_device *isdp; 340 u_int *mp; 341{ 342 config_isadev_c(isdp, mp, 0); 343} 344 345void 346reconfig_isadev(isdp, mp) 347 struct isa_device *isdp; 348 u_int *mp; 349{ 350 config_isadev_c(isdp, mp, 1); 351} 352 353static void 354config_isadev_c(isdp, mp, reconfig) 355 struct isa_device *isdp; 356 u_int *mp; 357 int reconfig; 358{ 359 u_int checkbits; 360 int id_alive; 361 int last_alive; 362 struct isa_driver *dp = isdp->id_driver; 363 364 if (!isdp->id_enabled) { 365 printf("%s%d: disabled, not probed.\n", 366 dp->name, isdp->id_unit); 367 return; 368 } 369 checkbits = CC_DRQ | CC_IOADDR | CC_MEMADDR; 370 if (!reconfig && haveseen_isadev(isdp, checkbits)) 371 return; 372 if (!reconfig && isdp->id_maddr) { 373 isdp->id_maddr -= ISA_HOLE_START; 374 isdp->id_maddr += atdevbase; 375 } 376 if (reconfig) { 377 last_alive = isdp->id_alive; 378 isdp->id_reconfig = 1; 379 } 380 else { 381 last_alive = 0; 382 isdp->id_reconfig = 0; 383 } 384 id_alive = (*dp->probe)(isdp); 385 if (id_alive) { 386 /* 387 * Only print the I/O address range if id_alive != -1 388 * Right now this is a temporary fix just for the new 389 * NPX code so that if it finds a 486 that can use trap 390 * 16 it will not report I/O addresses. 391 * Rod Grimes 04/26/94 392 */ 393 if (!isdp->id_reconfig) { 394 printf("%s%d", dp->name, isdp->id_unit); 395 if (id_alive != -1) { 396 if (isdp->id_iobase == -1) 397 printf(" at ?"); 398 else { 399 printf(" at 0x%x", isdp->id_iobase); 400 if (isdp->id_iobase + id_alive - 1 != 401 isdp->id_iobase) { 402 printf("-0x%x", 403 isdp->id_iobase + id_alive - 1); 404 } 405 } 406 } 407 if (isdp->id_irq) 408 printf(" irq %d", ffs(isdp->id_irq) - 1); 409 if (isdp->id_drq != -1) 410 printf(" drq %d", isdp->id_drq); 411 if (isdp->id_maddr) 412 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 413 if (isdp->id_msize) 414 printf(" msize %d", isdp->id_msize); 415 if (isdp->id_flags) 416 printf(" flags 0x%x", isdp->id_flags); 417 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 418 printf(" on motherboard"); 419 } else if (isdp->id_iobase >= 0x1000 && 420 !(isdp->id_iobase & 0x300)) { 421 printf (" on eisa slot %d", 422 isdp->id_iobase >> 12); 423 } else { 424 printf (" on isa"); 425 } 426 printf("\n"); 427 /* 428 * Check for conflicts again. The driver may have 429 * changed *dvp. We should weaken the early check 430 * since the driver may have been able to change 431 * *dvp to avoid conflicts if given a chance. We 432 * already skip the early check for IRQs and force 433 * a check for IRQs in the next group of checks. 434 */ 435 checkbits |= CC_IRQ; 436 if (haveseen_isadev(isdp, checkbits)) 437 return; 438 isdp->id_alive = id_alive; 439 } 440 (*dp->attach)(isdp); 441 if (isdp->id_irq) { 442 if (mp) 443 INTRMASK(*mp, isdp->id_irq); 444 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 445 isdp->id_ri_flags, isdp->id_intr, 446 mp, isdp->id_unit); 447 INTREN(isdp->id_irq); 448 } 449 } else { 450 if (isdp->id_reconfig) { 451 (*dp->attach)(isdp); /* reconfiguration attach */ 452 } 453 if (!last_alive) { 454 if (!isdp->id_reconfig) { 455 printf("%s%d not found", 456 dp->name, isdp->id_unit); 457 if (isdp->id_iobase != -1) 458 printf(" at 0x%x", isdp->id_iobase); 459 printf("\n"); 460 } 461 } 462 else { 463 /* This code has not been tested.... */ 464 if (isdp->id_irq) { 465 INTRDIS(isdp->id_irq); 466 unregister_intr(ffs(isdp->id_irq) - 1, 467 isdp->id_intr); 468 if (mp) 469 INTRUNMASK(*mp, isdp->id_irq); 470 } 471 } 472 } 473} 474 475/* 476 * Fill in default interrupt table (in case of spuruious interrupt 477 * during configuration of kernel, setup interrupt control unit 478 */ 479void 480isa_defaultirq() 481{ 482 int i; 483 484 /* icu vectors */ 485 for (i = 0; i < ICU_LEN; i++) 486 unregister_intr(i, (inthand2_t *)NULL); 487 488 /* initialize 8259's */ 489 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 490 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 491 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 492#ifdef AUTO_EOI_1 493 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 494#else 495 outb(IO_ICU1+1, 1); /* 8086 mode */ 496#endif 497 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 498 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 499 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 500 501 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 502 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 503 outb(IO_ICU2+1,2); /* my slave id is 2 */ 504#ifdef AUTO_EOI_2 505 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 506#else 507 outb(IO_ICU2+1,1); /* 8086 mode */ 508#endif 509 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 510 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 511} 512 513static caddr_t dma_bouncebuf[8]; 514static u_int dma_bouncebufsize[8]; 515static u_int8_t dma_bounced = 0; 516static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 517static u_int8_t dma_inuse = 0; /* User for acquire/release */ 518 519#define VALID_DMA_MASK (7) 520 521/* high byte of address is stored in this port for i-th dma channel */ 522static int dmapageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 523 524/* 525 * Setup a DMA channel's bounce buffer. 526 */ 527void 528isa_dmainit(chan, bouncebufsize) 529 int chan; 530 u_int bouncebufsize; 531{ 532 void *buf; 533 534#ifdef DIAGNOSTIC 535 if (chan & ~VALID_DMA_MASK) 536 panic("isa_dmainit: channel out of range"); 537 538 if (dma_bouncebuf[chan] != NULL) 539 panic("isa_dmainit: impossible request"); 540#endif 541 542 dma_bouncebufsize[chan] = bouncebufsize; 543 544 /* Try malloc() first. It works better if it works. */ 545 buf = malloc(bouncebufsize, M_DEVBUF, M_NOWAIT); 546 if (buf != NULL) { 547 if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 548 dma_bouncebuf[chan] = buf; 549 return; 550 } 551 free(buf, M_DEVBUF); 552 } 553 buf = contigmalloc(bouncebufsize, M_DEVBUF, M_NOWAIT, 0ul, 0xfffffful, 554 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 555 if (buf == NULL) 556 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 557 else 558 dma_bouncebuf[chan] = buf; 559} 560 561/* 562 * Register a DMA channel's usage. Usually called from a device driver 563 * in open() or during it's initialization. 564 */ 565int 566isa_dma_acquire(chan) 567 int chan; 568{ 569#ifdef DIAGNOSTIC 570 if (chan & ~VALID_DMA_MASK) 571 panic("isa_dma_acquire: channel out of range"); 572#endif 573 574 if (dma_inuse & (1 << chan)) { 575 printf("isa_dma_acquire: channel %d already in use\n", chan); 576 return (EBUSY); 577 } 578 dma_inuse |= (1 << chan); 579 580 return (0); 581} 582 583/* 584 * Unregister a DMA channel's usage. Usually called from a device driver 585 * during close() or during it's shutdown. 586 */ 587void 588isa_dma_release(chan) 589 int chan; 590{ 591#ifdef DIAGNOSTIC 592 if (chan & ~VALID_DMA_MASK) 593 panic("isa_dma_release: channel out of range"); 594 595 if (dma_inuse & (1 << chan) == 0) 596 printf("isa_dma_release: channel %d not in use\n", chan); 597#endif 598 599 if (dma_busy & (1 << chan)) { 600 dma_busy &= ~(1 << chan); 601 /* 602 * XXX We should also do "dma_bounced &= (1 << chan);" 603 * because we are acting on behalf of isa_dmadone() which 604 * was not called to end the last DMA operation. This does 605 * not matter now, but it may in the future. 606 */ 607 } 608 609 dma_inuse &= ~(1 << chan); 610} 611 612/* 613 * isa_dmacascade(): program 8237 DMA controller channel to accept 614 * external dma control by a board. 615 */ 616void isa_dmacascade(chan) 617 int chan; 618{ 619#ifdef DIAGNOSTIC 620 if (chan & ~VALID_DMA_MASK) 621 panic("isa_dmacascade: channel out of range"); 622#endif 623 624 /* set dma channel mode, and set dma channel mode */ 625 if ((chan & 4) == 0) { 626 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 627 outb(DMA1_SMSK, chan); 628 } else { 629 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 630 outb(DMA2_SMSK, chan & 3); 631 } 632} 633 634/* 635 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 636 * problems by using a bounce buffer. 637 */ 638void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 639{ 640 vm_offset_t phys; 641 int waport; 642 caddr_t newaddr; 643 644#ifdef DIAGNOSTIC 645 if (chan & ~VALID_DMA_MASK) 646 panic("isa_dmastart: channel out of range"); 647 648 if ((chan < 4 && nbytes > (1<<16)) 649 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 650 panic("isa_dmastart: impossible request"); 651 652 if (dma_inuse & (1 << chan) == 0) 653 printf("isa_dmastart: channel %d not acquired\n", chan); 654#endif 655 656 if (dma_busy & (1 << chan)) 657 printf("isa_dmastart: channel %d busy\n", chan); 658 659 dma_busy |= (1 << chan); 660 661 if (isa_dmarangecheck(addr, nbytes, chan)) { 662 if (dma_bouncebuf[chan] == NULL 663 || dma_bouncebufsize[chan] < nbytes) 664 panic("isa_dmastart: bad bounce buffer"); 665 dma_bounced |= (1 << chan); 666 newaddr = dma_bouncebuf[chan]; 667 668 /* copy bounce buffer on write */ 669 if (!(flags & B_READ)) 670 bcopy(addr, newaddr, nbytes); 671 addr = newaddr; 672 } 673 674 /* translate to physical */ 675 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 676 677 if ((chan & 4) == 0) { 678 /* 679 * Program one of DMA channels 0..3. These are 680 * byte mode channels. 681 */ 682 /* set dma channel mode, and reset address ff */ 683 684 /* If B_RAW flag is set, then use autoinitialise mode */ 685 if (flags & B_RAW) { 686 if (flags & B_READ) 687 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 688 else 689 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 690 } 691 else 692 if (flags & B_READ) 693 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 694 else 695 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 696 outb(DMA1_FFC, 0); 697 698 /* send start address */ 699 waport = DMA1_CHN(chan); 700 outb(waport, phys); 701 outb(waport, phys>>8); 702 outb(dmapageport[chan], phys>>16); 703 704 /* send count */ 705 outb(waport + 1, --nbytes); 706 outb(waport + 1, nbytes>>8); 707 708 /* unmask channel */ 709 outb(DMA1_SMSK, chan); 710 } else { 711 /* 712 * Program one of DMA channels 4..7. These are 713 * word mode channels. 714 */ 715 /* set dma channel mode, and reset address ff */ 716 717 /* If B_RAW flag is set, then use autoinitialise mode */ 718 if (flags & B_RAW) { 719 if (flags & B_READ) 720 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 721 else 722 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 723 } 724 else 725 if (flags & B_READ) 726 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 727 else 728 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 729 outb(DMA2_FFC, 0); 730 731 /* send start address */ 732 waport = DMA2_CHN(chan - 4); 733 outb(waport, phys>>1); 734 outb(waport, phys>>9); 735 outb(dmapageport[chan], phys>>16); 736 737 /* send count */ 738 nbytes >>= 1; 739 outb(waport + 2, --nbytes); 740 outb(waport + 2, nbytes>>8); 741 742 /* unmask channel */ 743 outb(DMA2_SMSK, chan & 3); 744 } 745} 746 747void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 748{ 749#ifdef DIAGNOSTIC 750 if (chan & ~VALID_DMA_MASK) 751 panic("isa_dmadone: channel out of range"); 752 753 if (dma_inuse & (1 << chan) == 0) 754 printf("isa_dmadone: channel %d not acquired\n", chan); 755#endif 756 757#if 0 758 /* 759 * XXX This should be checked, but drivers like ad1848 only call 760 * isa_dmastart() once because they use Auto DMA mode. If we 761 * leave this in, drivers that do this will print this continuously. 762 */ 763 if (dma_busy & (1 << chan) == 0) 764 printf("isa_dmadone: channel %d not busy\n", chan); 765#endif 766 767 if (dma_bounced & (1 << chan)) { 768 /* copy bounce buffer on read */ 769 if (flags & B_READ) 770 bcopy(dma_bouncebuf[chan], addr, nbytes); 771 772 dma_bounced &= ~(1 << chan); 773 } 774 dma_busy &= ~(1 << chan); 775} 776 777/* 778 * Check for problems with the address range of a DMA transfer 779 * (non-contiguous physical pages, outside of bus address space, 780 * crossing DMA page boundaries). 781 * Return true if special handling needed. 782 */ 783 784static int 785isa_dmarangecheck(caddr_t va, u_int length, int chan) { 786 vm_offset_t phys, priorpage = 0, endva; 787 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 788 789 endva = (vm_offset_t)round_page(va + length); 790 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 791 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 792#define ISARAM_END RAM_END 793 if (phys == 0) 794 panic("isa_dmacheck: no physical page present"); 795 if (phys >= ISARAM_END) 796 return (1); 797 if (priorpage) { 798 if (priorpage + PAGE_SIZE != phys) 799 return (1); 800 /* check if crossing a DMA page boundary */ 801 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 802 return (1); 803 } 804 priorpage = phys; 805 } 806 return (0); 807} 808 809#define NMI_PARITY (1 << 7) 810#define NMI_IOCHAN (1 << 6) 811#define ENMI_WATCHDOG (1 << 7) 812#define ENMI_BUSTIMER (1 << 6) 813#define ENMI_IOSTATUS (1 << 5) 814 815/* 816 * Handle a NMI, possibly a machine check. 817 * return true to panic system, false to ignore. 818 */ 819int 820isa_nmi(cd) 821 int cd; 822{ 823 int isa_port = inb(0x61); 824 int eisa_port = inb(0x461); 825 if(isa_port & NMI_PARITY) { 826 panic("RAM parity error, likely hardware failure."); 827 } else if(isa_port & NMI_IOCHAN) { 828 panic("I/O channel check, likely hardware failure."); 829 } else if(eisa_port & ENMI_WATCHDOG) { 830 panic("EISA watchdog timer expired, likely hardware failure."); 831 } else if(eisa_port & ENMI_BUSTIMER) { 832 panic("EISA bus timeout, likely hardware failure."); 833 } else if(eisa_port & ENMI_IOSTATUS) { 834 panic("EISA I/O port status error."); 835 } else { 836 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 837 return(0); 838 } 839} 840 841/* 842 * Caught a stray interrupt, notify 843 */ 844static void 845isa_strayintr(d) 846 int d; 847{ 848 849 /* DON'T BOTHER FOR NOW! */ 850 /* for some reason, we get bursts of intr #7, even if not enabled! */ 851 /* 852 * Well the reason you got bursts of intr #7 is because someone 853 * raised an interrupt line and dropped it before the 8259 could 854 * prioritize it. This is documented in the intel data book. This 855 * means you have BAD hardware! I have changed this so that only 856 * the first 5 get logged, then it quits logging them, and puts 857 * out a special message. rgrimes 3/25/1993 858 */ 859 /* 860 * XXX TODO print a different message for #7 if it is for a 861 * glitch. Glitches can be distinguished from real #7's by 862 * testing that the in-service bit is _not_ set. The test 863 * must be done before sending an EOI so it can't be done if 864 * we are using AUTO_EOI_1. 865 */ 866 if (intrcnt[NR_DEVICES + d] <= 5) 867 log(LOG_ERR, "stray irq %d\n", d); 868 if (intrcnt[NR_DEVICES + d] == 5) 869 log(LOG_CRIT, 870 "too many stray irq %d's; not logging any more\n", d); 871} 872 873/* 874 * Find the highest priority enabled display device. Since we can't 875 * distinguish display devices from ttys, depend on display devices 876 * being sensitive and before sensitive non-display devices (if any) 877 * in isa_devtab_tty. 878 * 879 * XXX we should add capability flags IAMDISPLAY and ISUPPORTCONSOLES. 880 */ 881struct isa_device * 882find_display() 883{ 884 struct isa_device *dvp; 885 886 for (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) 887 if (dvp->id_driver->sensitive_hw && dvp->id_enabled) 888 return (dvp); 889 return (NULL); 890} 891 892/* 893 * find an ISA device in a given isa_devtab_* table, given 894 * the table to search, the expected id_driver entry, and the unit number. 895 * 896 * this function is defined in isa_device.h, and this location is debatable; 897 * i put it there because it's useless w/o, and directly operates on 898 * the other stuff in that file. 899 * 900 */ 901 902struct isa_device *find_isadev(table, driverp, unit) 903 struct isa_device *table; 904 struct isa_driver *driverp; 905 int unit; 906{ 907 if (driverp == NULL) /* sanity check */ 908 return NULL; 909 910 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 911 if (table->id_driver == 0) 912 return NULL; 913 914 table++; 915 } 916 917 return table; 918} 919 920/* 921 * Return nonzero if a (masked) irq is pending for a given device. 922 */ 923int 924isa_irq_pending(dvp) 925 struct isa_device *dvp; 926{ 927 unsigned id_irq; 928 929 id_irq = dvp->id_irq; 930 if (id_irq & 0xff) 931 return (inb(IO_ICU1) & id_irq); 932 return (inb(IO_ICU2) & (id_irq >> 8)); 933} 934 935int 936update_intr_masks(void) 937{ 938 int intr, n=0; 939 u_int mask,*maskptr; 940 941 for (intr=0; intr < ICU_LEN; intr ++) { 942 if (intr==2) continue; 943 maskptr = intr_mptr[intr]; 944 if (!maskptr) continue; 945 *maskptr |= 1 << intr; 946 mask = *maskptr; 947 if (mask != intr_mask[intr]) { 948#if 0 949 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 950 intr, intr_mask[intr], mask, maskptr); 951#endif 952 intr_mask[intr]=mask; 953 n++; 954 } 955 956 } 957 return (n); 958} 959 960int 961register_intr(intr, device_id, flags, handler, maskptr, unit) 962 int intr; 963 int device_id; 964 u_int flags; 965 inthand2_t *handler; 966 u_int *maskptr; 967 int unit; 968{ 969 char *cp; 970 u_long ef; 971 int id; 972 u_int mask = (maskptr ? *maskptr : 0); 973 974 if ((u_int)intr >= ICU_LEN || intr == 2 975 || (u_int)device_id >= NR_DEVICES) 976 return (EINVAL); 977 if (intr_handler[intr] != isa_strayintr) 978 return (EBUSY); 979 ef = read_eflags(); 980 disable_intr(); 981 intr_countp[intr] = &intrcnt[device_id]; 982 intr_handler[intr] = handler; 983 intr_mptr[intr] = maskptr; 984 intr_mask[intr] = mask | (1 << intr); 985 intr_unit[intr] = unit; 986 setidt(ICU_OFFSET + intr, 987 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 988 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 989 write_eflags(ef); 990 for (cp = intrnames, id = 0; id <= device_id; id++) 991 while (*cp++ != '\0') 992 ; 993 if (cp > eintrnames) 994 return (0); 995 if (intr < 10) { 996 cp[-3] = intr + '0'; 997 cp[-2] = ' '; 998 } else { 999 cp[-3] = '1'; 1000 cp[-2] = intr - 10 + '0'; 1001 } 1002 return (0); 1003} 1004 1005static void 1006register_imask(dvp, mask) 1007 struct isa_device *dvp; 1008 u_int mask; 1009{ 1010 if (dvp->id_alive && dvp->id_irq) { 1011 int intr; 1012 1013 intr = ffs(dvp->id_irq) - 1; 1014 intr_mask[intr] = mask | (1 <<intr); 1015 } 1016 (void) update_intr_masks(); 1017} 1018 1019int 1020unregister_intr(intr, handler) 1021 int intr; 1022 inthand2_t *handler; 1023{ 1024 u_long ef; 1025 1026 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1027 return (EINVAL); 1028 ef = read_eflags(); 1029 disable_intr(); 1030 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1031 intr_handler[intr] = isa_strayintr; 1032 intr_mptr[intr] = NULL; 1033 intr_mask[intr] = HWI_MASK | SWI_MASK; 1034 intr_unit[intr] = intr; 1035 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, 1036 GSEL(GCODE_SEL, SEL_KPL)); 1037 write_eflags(ef); 1038 return (0); 1039} 1040