isa.c revision 25164
1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 37 * $Id: isa.c,v 1.80 1997/03/28 01:02:17 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#include "opt_smp.h" 52 53#include <sys/param.h> 54#include <sys/systm.h> 55#include <sys/buf.h> 56#include <sys/syslog.h> 57#include <sys/malloc.h> 58#include <machine/md_var.h> 59#include <machine/segments.h> 60#if defined(APIC_IO) 61#include <machine/smp.h> 62#include <machine/apic.h> 63#endif /* APIC_IO */ 64#include <vm/vm.h> 65#include <vm/vm_param.h> 66#include <vm/pmap.h> 67#include <i386/isa/isa_device.h> 68#include <i386/isa/isa.h> 69#include <i386/isa/icu.h> 70#include <i386/isa/ic/i8237.h> 71#include "vector.h" 72 73#ifdef APIC_IO 74/* 75 * This is to accommodate "mixed-mode" programming for 76 * motherboards that don't connect the 8254 to the IO APIC. 77 */ 78#define AUTO_EOI_1 79#endif 80 81/* 82** Register definitions for DMA controller 1 (channels 0..3): 83*/ 84#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 85#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 86#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 87#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 88 89/* 90** Register definitions for DMA controller 2 (channels 4..7): 91*/ 92#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 93#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 94#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 95#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 96 97u_long *intr_countp[ICU_LEN]; 98inthand2_t *intr_handler[ICU_LEN]; 99u_int intr_mask[ICU_LEN]; 100u_int* intr_mptr[ICU_LEN]; 101int intr_unit[ICU_LEN]; 102 103static inthand_t *fastintr[ICU_LEN] = { 104 &IDTVEC(fastintr0), &IDTVEC(fastintr1), 105 &IDTVEC(fastintr2), &IDTVEC(fastintr3), 106 &IDTVEC(fastintr4), &IDTVEC(fastintr5), 107 &IDTVEC(fastintr6), &IDTVEC(fastintr7), 108 &IDTVEC(fastintr8), &IDTVEC(fastintr9), 109 &IDTVEC(fastintr10), &IDTVEC(fastintr11), 110 &IDTVEC(fastintr12), &IDTVEC(fastintr13), 111 &IDTVEC(fastintr14), &IDTVEC(fastintr15) 112#if defined(APIC_IO) 113 , &IDTVEC(fastintr16), &IDTVEC(fastintr17), 114 &IDTVEC(fastintr18), &IDTVEC(fastintr19), 115 &IDTVEC(fastintr20), &IDTVEC(fastintr21), 116 &IDTVEC(fastintr22), &IDTVEC(fastintr23) 117#if defined(IPI_INTS) 118/* XXX probably NOT needed, we register_intr(slowintr[I]) */ 119 , &IDTVEC(ipi24), &IDTVEC(ipi25), &IDTVEC(ipi26), &IDTVEC(ipi27) 120#endif /* IPI_INTS */ 121#endif /* APIC_IO */ 122}; 123 124static inthand_t *slowintr[ICU_LEN] = { 125 &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 126 &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 127 &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 128 &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 129#if defined(APIC_IO) 130 , &IDTVEC(intr16), &IDTVEC(intr17), &IDTVEC(intr18), &IDTVEC(intr19), 131 &IDTVEC(intr20), &IDTVEC(intr21), &IDTVEC(intr22), &IDTVEC(intr23) 132#if defined(IPI_INTS) 133 , &IDTVEC(ipi24), &IDTVEC(ipi25), &IDTVEC(ipi26), &IDTVEC(ipi27) 134#endif /* IPI_INTS */ 135#endif /* APIC_IO */ 136}; 137 138static void config_isadev __P((struct isa_device *isdp, u_int *mp)); 139static void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 140 int reconfig)); 141static void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 142 int item, char const *whatnot, char const *reason, 143 char const *format)); 144static int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 145 u_int checkbits)); 146static int isa_dmarangecheck __P((caddr_t va, u_int length, int chan)); 147static inthand2_t isa_strayintr; 148static void register_imask __P((struct isa_device *dvp, u_int mask)); 149 150/* 151 * print a conflict message 152 */ 153static void 154conflict(dvp, tmpdvp, item, whatnot, reason, format) 155 struct isa_device *dvp; 156 struct isa_device *tmpdvp; 157 int item; 158 char const *whatnot; 159 char const *reason; 160 char const *format; 161{ 162 printf("%s%d not %sed due to %s conflict with %s%d at ", 163 dvp->id_driver->name, dvp->id_unit, whatnot, reason, 164 tmpdvp->id_driver->name, tmpdvp->id_unit); 165 printf(format, item); 166 printf("\n"); 167} 168 169/* 170 * Check to see if things are already in use, like IRQ's, I/O addresses 171 * and Memory addresses. 172 */ 173static int 174haveseen(dvp, tmpdvp, checkbits) 175 struct isa_device *dvp; 176 struct isa_device *tmpdvp; 177 u_int checkbits; 178{ 179 /* 180 * Only check against devices that have already been found and are not 181 * unilaterally allowed to conflict anyway. 182 */ 183 if (tmpdvp->id_alive && !dvp->id_conflicts) { 184 char const *whatnot; 185 186 whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 187 /* 188 * Check for I/O address conflict. We can only check the 189 * starting address of the device against the range of the 190 * device that has already been probed since we do not 191 * know how many I/O addresses this device uses. 192 */ 193 if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 194 if ((dvp->id_iobase >= tmpdvp->id_iobase) && 195 (dvp->id_iobase <= 196 (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 197 conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 198 "I/O address", "0x%x"); 199 return 1; 200 } 201 } 202 /* 203 * Check for Memory address conflict. We can check for 204 * range overlap, but it will not catch all cases since the 205 * driver may adjust the msize paramater during probe, for 206 * now we just check that the starting address does not 207 * fall within any allocated region. 208 * XXX could add a second check after the probe for overlap, 209 * since at that time we would know the full range. 210 * XXX KERNBASE is a hack, we should have vaddr in the table! 211 */ 212 if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 213 if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 214 (KERNBASE + dvp->id_maddr <= 215 (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 216 conflict(dvp, tmpdvp, (int)dvp->id_maddr, 217 whatnot, "maddr", "0x%x"); 218 return 1; 219 } 220 } 221 /* 222 * Check for IRQ conflicts. 223 */ 224 if (checkbits & CC_IRQ && tmpdvp->id_irq) { 225 if (tmpdvp->id_irq == dvp->id_irq) { 226 conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 227 whatnot, "irq", "%d"); 228 return 1; 229 } 230 } 231 /* 232 * Check for DRQ conflicts. 233 */ 234 if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 235 if (tmpdvp->id_drq == dvp->id_drq) { 236 conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 237 "drq", "%d"); 238 return 1; 239 } 240 } 241 } 242 return 0; 243} 244 245/* 246 * Search through all the isa_devtab_* tables looking for anything that 247 * conflicts with the current device. 248 */ 249int 250haveseen_isadev(dvp, checkbits) 251 struct isa_device *dvp; 252 u_int checkbits; 253{ 254 struct isa_device *tmpdvp; 255 int status = 0; 256 257 for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 258 status |= haveseen(dvp, tmpdvp, checkbits); 259 if (status) 260 return status; 261 } 262 for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 263 status |= haveseen(dvp, tmpdvp, checkbits); 264 if (status) 265 return status; 266 } 267 for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 268 status |= haveseen(dvp, tmpdvp, checkbits); 269 if (status) 270 return status; 271 } 272 for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 273 status |= haveseen(dvp, tmpdvp, checkbits); 274 if (status) 275 return status; 276 } 277 return(status); 278} 279 280/* 281 * Configure all ISA devices 282 */ 283void 284isa_configure() { 285 struct isa_device *dvp; 286 287 splhigh(); 288 printf("Probing for devices on the ISA bus:\n"); 289 /* First probe all the sensitive probes */ 290 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 291 if (dvp->id_driver->sensitive_hw) 292 config_isadev(dvp, &tty_imask); 293 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 294 if (dvp->id_driver->sensitive_hw) 295 config_isadev(dvp, &bio_imask); 296 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 297 if (dvp->id_driver->sensitive_hw) 298 config_isadev(dvp, &net_imask); 299 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 300 if (dvp->id_driver->sensitive_hw) 301 config_isadev(dvp, (u_int *)NULL); 302 303 /* Then all the bad ones */ 304 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 305 if (!dvp->id_driver->sensitive_hw) 306 config_isadev(dvp, &tty_imask); 307 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 308 if (!dvp->id_driver->sensitive_hw) 309 config_isadev(dvp, &bio_imask); 310 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 311 if (!dvp->id_driver->sensitive_hw) 312 config_isadev(dvp, &net_imask); 313 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 314 if (!dvp->id_driver->sensitive_hw) 315 config_isadev(dvp, (u_int *)NULL); 316 317 bio_imask |= SWI_CLOCK_MASK; 318 net_imask |= SWI_NET_MASK; 319 tty_imask |= SWI_TTY_MASK; 320 321/* 322 * XXX we should really add the tty device to net_imask when the line is 323 * switched to SLIPDISC, and then remove it when it is switched away from 324 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 325 * of them is running slip. 326 * 327 * XXX actually, blocking all ttys during a splimp doesn't matter so much 328 * with sio because the serial interrupt layer doesn't use tty_imask. Only 329 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 330 * during spltty. 331 */ 332#include "sl.h" 333#if NSL > 0 334 net_imask |= tty_imask; 335 tty_imask = net_imask; 336#endif 337 338 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 339 340 if (bootverbose) 341 printf("imasks: bio %x, tty %x, net %x\n", 342 bio_imask, tty_imask, net_imask); 343 344 /* 345 * Finish initializing intr_mask[]. Note that the partly 346 * constructed masks aren't actually used since we're at splhigh. 347 * For fully dynamic initialization, register_intr() and 348 * unregister_intr() will have to adjust the masks for _all_ 349 * interrupts and for tty_imask, etc. 350 */ 351 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 352 register_imask(dvp, tty_imask); 353 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 354 register_imask(dvp, bio_imask); 355 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 356 register_imask(dvp, net_imask); 357 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 358 register_imask(dvp, SWI_CLOCK_MASK); 359 spl0(); 360} 361 362/* 363 * Configure an ISA device. 364 */ 365 366 367static void 368config_isadev(isdp, mp) 369 struct isa_device *isdp; 370 u_int *mp; 371{ 372 config_isadev_c(isdp, mp, 0); 373} 374 375void 376reconfig_isadev(isdp, mp) 377 struct isa_device *isdp; 378 u_int *mp; 379{ 380 config_isadev_c(isdp, mp, 1); 381} 382 383static void 384config_isadev_c(isdp, mp, reconfig) 385 struct isa_device *isdp; 386 u_int *mp; 387 int reconfig; 388{ 389 u_int checkbits; 390 int id_alive; 391 int last_alive; 392 struct isa_driver *dp = isdp->id_driver; 393 394 if (!isdp->id_enabled) { 395 printf("%s%d: disabled, not probed.\n", 396 dp->name, isdp->id_unit); 397 return; 398 } 399 checkbits = CC_DRQ | CC_IOADDR | CC_MEMADDR; 400 if (!reconfig && haveseen_isadev(isdp, checkbits)) 401 return; 402 if (!reconfig && isdp->id_maddr) { 403 isdp->id_maddr -= ISA_HOLE_START; 404 isdp->id_maddr += atdevbase; 405 } 406 if (reconfig) { 407 last_alive = isdp->id_alive; 408 isdp->id_reconfig = 1; 409 } 410 else { 411 last_alive = 0; 412 isdp->id_reconfig = 0; 413 } 414 id_alive = (*dp->probe)(isdp); 415 if (id_alive) { 416 /* 417 * Only print the I/O address range if id_alive != -1 418 * Right now this is a temporary fix just for the new 419 * NPX code so that if it finds a 486 that can use trap 420 * 16 it will not report I/O addresses. 421 * Rod Grimes 04/26/94 422 */ 423 if (!isdp->id_reconfig) { 424 printf("%s%d", dp->name, isdp->id_unit); 425 if (id_alive != -1) { 426 if (isdp->id_iobase == -1) 427 printf(" at ?"); 428 else { 429 printf(" at 0x%x", isdp->id_iobase); 430 if (isdp->id_iobase + id_alive - 1 != 431 isdp->id_iobase) { 432 printf("-0x%x", 433 isdp->id_iobase + id_alive - 1); 434 } 435 } 436 } 437 if (isdp->id_irq) 438 printf(" irq %d", ffs(isdp->id_irq) - 1); 439 if (isdp->id_drq != -1) 440 printf(" drq %d", isdp->id_drq); 441 if (isdp->id_maddr) 442 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 443 if (isdp->id_msize) 444 printf(" msize %d", isdp->id_msize); 445 if (isdp->id_flags) 446 printf(" flags 0x%x", isdp->id_flags); 447 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 448 printf(" on motherboard"); 449 } else if (isdp->id_iobase >= 0x1000 && 450 !(isdp->id_iobase & 0x300)) { 451 printf (" on eisa slot %d", 452 isdp->id_iobase >> 12); 453 } else { 454 printf (" on isa"); 455 } 456 printf("\n"); 457 /* 458 * Check for conflicts again. The driver may have 459 * changed *dvp. We should weaken the early check 460 * since the driver may have been able to change 461 * *dvp to avoid conflicts if given a chance. We 462 * already skip the early check for IRQs and force 463 * a check for IRQs in the next group of checks. 464 */ 465 checkbits |= CC_IRQ; 466 if (haveseen_isadev(isdp, checkbits)) 467 return; 468 isdp->id_alive = id_alive; 469 } 470 (*dp->attach)(isdp); 471 if (isdp->id_irq) { 472 if (mp) 473 INTRMASK(*mp, isdp->id_irq); 474 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 475 isdp->id_ri_flags, isdp->id_intr, 476 mp, isdp->id_unit); 477 INTREN(isdp->id_irq); 478 } 479 } else { 480 if (isdp->id_reconfig) { 481 (*dp->attach)(isdp); /* reconfiguration attach */ 482 } 483 if (!last_alive) { 484 if (!isdp->id_reconfig) { 485 printf("%s%d not found", 486 dp->name, isdp->id_unit); 487 if (isdp->id_iobase != -1) 488 printf(" at 0x%x", isdp->id_iobase); 489 printf("\n"); 490 } 491 } 492 else { 493 /* This code has not been tested.... */ 494 if (isdp->id_irq) { 495 INTRDIS(isdp->id_irq); 496 unregister_intr(ffs(isdp->id_irq) - 1, 497 isdp->id_intr); 498 if (mp) 499 INTRUNMASK(*mp, isdp->id_irq); 500 } 501 } 502 } 503} 504 505/* 506 * Fill in default interrupt table (in case of spuruious interrupt 507 * during configuration of kernel, setup interrupt control unit 508 */ 509void 510isa_defaultirq() 511{ 512 int i; 513 514 /* icu vectors */ 515 for (i = 0; i < ICU_LEN; i++) 516 unregister_intr(i, (inthand2_t *)NULL); 517 518 /* initialize 8259's */ 519 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 520 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 521 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 522#ifdef AUTO_EOI_1 523 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 524#else 525 outb(IO_ICU1+1, 1); /* 8086 mode */ 526#endif 527 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 528 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 529 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 530 531 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 532 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 533 outb(IO_ICU2+1,2); /* my slave id is 2 */ 534#ifdef AUTO_EOI_2 535 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 536#else 537 outb(IO_ICU2+1,1); /* 8086 mode */ 538#endif 539 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 540 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 541} 542 543static caddr_t dma_bouncebuf[8]; 544static u_int dma_bouncebufsize[8]; 545static u_int8_t dma_bounced = 0; 546static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 547static u_int8_t dma_inuse = 0; /* User for acquire/release */ 548 549#define VALID_DMA_MASK (7) 550 551/* high byte of address is stored in this port for i-th dma channel */ 552static int dmapageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 553 554/* 555 * Setup a DMA channel's bounce buffer. 556 */ 557void 558isa_dmainit(chan, bouncebufsize) 559 int chan; 560 u_int bouncebufsize; 561{ 562 void *buf; 563 564#ifdef DIAGNOSTIC 565 if (chan & ~VALID_DMA_MASK) 566 panic("isa_dmainit: channel out of range"); 567 568 if (dma_bouncebuf[chan] != NULL) 569 panic("isa_dmainit: impossible request"); 570#endif 571 572 dma_bouncebufsize[chan] = bouncebufsize; 573 574 /* Try malloc() first. It works better if it works. */ 575 buf = malloc(bouncebufsize, M_DEVBUF, M_NOWAIT); 576 if (buf != NULL) { 577 if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 578 dma_bouncebuf[chan] = buf; 579 return; 580 } 581 free(buf, M_DEVBUF); 582 } 583 buf = contigmalloc(bouncebufsize, M_DEVBUF, M_NOWAIT, 0ul, 0xfffffful, 584 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 585 if (buf == NULL) 586 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 587 else 588 dma_bouncebuf[chan] = buf; 589} 590 591/* 592 * Register a DMA channel's usage. Usually called from a device driver 593 * in open() or during it's initialization. 594 */ 595int 596isa_dma_acquire(chan) 597 int chan; 598{ 599#ifdef DIAGNOSTIC 600 if (chan & ~VALID_DMA_MASK) 601 panic("isa_dma_acquire: channel out of range"); 602#endif 603 604 if (dma_inuse & (1 << chan)) { 605 printf("isa_dma_acquire: channel %d already in use\n", chan); 606 return (EBUSY); 607 } 608 dma_inuse |= (1 << chan); 609 610 return (0); 611} 612 613/* 614 * Unregister a DMA channel's usage. Usually called from a device driver 615 * during close() or during it's shutdown. 616 */ 617void 618isa_dma_release(chan) 619 int chan; 620{ 621#ifdef DIAGNOSTIC 622 if (chan & ~VALID_DMA_MASK) 623 panic("isa_dma_release: channel out of range"); 624 625 if (dma_inuse & (1 << chan) == 0) 626 printf("isa_dma_release: channel %d not in use\n", chan); 627#endif 628 629 if (dma_busy & (1 << chan)) { 630 dma_busy &= ~(1 << chan); 631 /* 632 * XXX We should also do "dma_bounced &= (1 << chan);" 633 * because we are acting on behalf of isa_dmadone() which 634 * was not called to end the last DMA operation. This does 635 * not matter now, but it may in the future. 636 */ 637 } 638 639 dma_inuse &= ~(1 << chan); 640} 641 642/* 643 * isa_dmacascade(): program 8237 DMA controller channel to accept 644 * external dma control by a board. 645 */ 646void isa_dmacascade(chan) 647 int chan; 648{ 649#ifdef DIAGNOSTIC 650 if (chan & ~VALID_DMA_MASK) 651 panic("isa_dmacascade: channel out of range"); 652#endif 653 654 /* set dma channel mode, and set dma channel mode */ 655 if ((chan & 4) == 0) { 656 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 657 outb(DMA1_SMSK, chan); 658 } else { 659 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 660 outb(DMA2_SMSK, chan & 3); 661 } 662} 663 664/* 665 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 666 * problems by using a bounce buffer. 667 */ 668void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 669{ 670 vm_offset_t phys; 671 int waport; 672 caddr_t newaddr; 673 674#ifdef DIAGNOSTIC 675 if (chan & ~VALID_DMA_MASK) 676 panic("isa_dmastart: channel out of range"); 677 678 if ((chan < 4 && nbytes > (1<<16)) 679 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 680 panic("isa_dmastart: impossible request"); 681 682 if (dma_inuse & (1 << chan) == 0) 683 printf("isa_dmastart: channel %d not acquired\n", chan); 684#endif 685 686 if (dma_busy & (1 << chan)) 687 printf("isa_dmastart: channel %d busy\n", chan); 688 689 dma_busy |= (1 << chan); 690 691 if (isa_dmarangecheck(addr, nbytes, chan)) { 692 if (dma_bouncebuf[chan] == NULL 693 || dma_bouncebufsize[chan] < nbytes) 694 panic("isa_dmastart: bad bounce buffer"); 695 dma_bounced |= (1 << chan); 696 newaddr = dma_bouncebuf[chan]; 697 698 /* copy bounce buffer on write */ 699 if (!(flags & B_READ)) 700 bcopy(addr, newaddr, nbytes); 701 addr = newaddr; 702 } 703 704 /* translate to physical */ 705 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 706 707 if ((chan & 4) == 0) { 708 /* 709 * Program one of DMA channels 0..3. These are 710 * byte mode channels. 711 */ 712 /* set dma channel mode, and reset address ff */ 713 714 /* If B_RAW flag is set, then use autoinitialise mode */ 715 if (flags & B_RAW) { 716 if (flags & B_READ) 717 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 718 else 719 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 720 } 721 else 722 if (flags & B_READ) 723 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 724 else 725 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 726 outb(DMA1_FFC, 0); 727 728 /* send start address */ 729 waport = DMA1_CHN(chan); 730 outb(waport, phys); 731 outb(waport, phys>>8); 732 outb(dmapageport[chan], phys>>16); 733 734 /* send count */ 735 outb(waport + 1, --nbytes); 736 outb(waport + 1, nbytes>>8); 737 738 /* unmask channel */ 739 outb(DMA1_SMSK, chan); 740 } else { 741 /* 742 * Program one of DMA channels 4..7. These are 743 * word mode channels. 744 */ 745 /* set dma channel mode, and reset address ff */ 746 747 /* If B_RAW flag is set, then use autoinitialise mode */ 748 if (flags & B_RAW) { 749 if (flags & B_READ) 750 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 751 else 752 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 753 } 754 else 755 if (flags & B_READ) 756 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 757 else 758 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 759 outb(DMA2_FFC, 0); 760 761 /* send start address */ 762 waport = DMA2_CHN(chan - 4); 763 outb(waport, phys>>1); 764 outb(waport, phys>>9); 765 outb(dmapageport[chan], phys>>16); 766 767 /* send count */ 768 nbytes >>= 1; 769 outb(waport + 2, --nbytes); 770 outb(waport + 2, nbytes>>8); 771 772 /* unmask channel */ 773 outb(DMA2_SMSK, chan & 3); 774 } 775} 776 777void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 778{ 779#ifdef DIAGNOSTIC 780 if (chan & ~VALID_DMA_MASK) 781 panic("isa_dmadone: channel out of range"); 782 783 if (dma_inuse & (1 << chan) == 0) 784 printf("isa_dmadone: channel %d not acquired\n", chan); 785#endif 786 787#if 0 788 /* 789 * XXX This should be checked, but drivers like ad1848 only call 790 * isa_dmastart() once because they use Auto DMA mode. If we 791 * leave this in, drivers that do this will print this continuously. 792 */ 793 if (dma_busy & (1 << chan) == 0) 794 printf("isa_dmadone: channel %d not busy\n", chan); 795#endif 796 797 if (dma_bounced & (1 << chan)) { 798 /* copy bounce buffer on read */ 799 if (flags & B_READ) 800 bcopy(dma_bouncebuf[chan], addr, nbytes); 801 802 dma_bounced &= ~(1 << chan); 803 } 804 dma_busy &= ~(1 << chan); 805} 806 807/* 808 * Check for problems with the address range of a DMA transfer 809 * (non-contiguous physical pages, outside of bus address space, 810 * crossing DMA page boundaries). 811 * Return true if special handling needed. 812 */ 813 814static int 815isa_dmarangecheck(caddr_t va, u_int length, int chan) { 816 vm_offset_t phys, priorpage = 0, endva; 817 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 818 819 endva = (vm_offset_t)round_page(va + length); 820 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 821 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 822#define ISARAM_END RAM_END 823 if (phys == 0) 824 panic("isa_dmacheck: no physical page present"); 825 if (phys >= ISARAM_END) 826 return (1); 827 if (priorpage) { 828 if (priorpage + PAGE_SIZE != phys) 829 return (1); 830 /* check if crossing a DMA page boundary */ 831 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 832 return (1); 833 } 834 priorpage = phys; 835 } 836 return (0); 837} 838 839#define NMI_PARITY (1 << 7) 840#define NMI_IOCHAN (1 << 6) 841#define ENMI_WATCHDOG (1 << 7) 842#define ENMI_BUSTIMER (1 << 6) 843#define ENMI_IOSTATUS (1 << 5) 844 845/* 846 * Handle a NMI, possibly a machine check. 847 * return true to panic system, false to ignore. 848 */ 849int 850isa_nmi(cd) 851 int cd; 852{ 853 int isa_port = inb(0x61); 854 int eisa_port = inb(0x461); 855 if(isa_port & NMI_PARITY) { 856 panic("RAM parity error, likely hardware failure."); 857 } else if(isa_port & NMI_IOCHAN) { 858 panic("I/O channel check, likely hardware failure."); 859 } else if(eisa_port & ENMI_WATCHDOG) { 860 panic("EISA watchdog timer expired, likely hardware failure."); 861 } else if(eisa_port & ENMI_BUSTIMER) { 862 panic("EISA bus timeout, likely hardware failure."); 863 } else if(eisa_port & ENMI_IOSTATUS) { 864 panic("EISA I/O port status error."); 865 } else { 866 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 867 return(0); 868 } 869} 870 871/* 872 * Caught a stray interrupt, notify 873 */ 874static void 875isa_strayintr(d) 876 int d; 877{ 878 879 /* DON'T BOTHER FOR NOW! */ 880 /* for some reason, we get bursts of intr #7, even if not enabled! */ 881 /* 882 * Well the reason you got bursts of intr #7 is because someone 883 * raised an interrupt line and dropped it before the 8259 could 884 * prioritize it. This is documented in the intel data book. This 885 * means you have BAD hardware! I have changed this so that only 886 * the first 5 get logged, then it quits logging them, and puts 887 * out a special message. rgrimes 3/25/1993 888 */ 889 /* 890 * XXX TODO print a different message for #7 if it is for a 891 * glitch. Glitches can be distinguished from real #7's by 892 * testing that the in-service bit is _not_ set. The test 893 * must be done before sending an EOI so it can't be done if 894 * we are using AUTO_EOI_1. 895 */ 896 if (intrcnt[NR_DEVICES + d] <= 5) 897 log(LOG_ERR, "stray irq %d\n", d); 898 if (intrcnt[NR_DEVICES + d] == 5) 899 log(LOG_CRIT, 900 "too many stray irq %d's; not logging any more\n", d); 901} 902 903/* 904 * Find the highest priority enabled display device. Since we can't 905 * distinguish display devices from ttys, depend on display devices 906 * being sensitive and before sensitive non-display devices (if any) 907 * in isa_devtab_tty. 908 * 909 * XXX we should add capability flags IAMDISPLAY and ISUPPORTCONSOLES. 910 */ 911struct isa_device * 912find_display() 913{ 914 struct isa_device *dvp; 915 916 for (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) 917 if (dvp->id_driver->sensitive_hw && dvp->id_enabled) 918 return (dvp); 919 return (NULL); 920} 921 922/* 923 * find an ISA device in a given isa_devtab_* table, given 924 * the table to search, the expected id_driver entry, and the unit number. 925 * 926 * this function is defined in isa_device.h, and this location is debatable; 927 * i put it there because it's useless w/o, and directly operates on 928 * the other stuff in that file. 929 * 930 */ 931 932struct isa_device *find_isadev(table, driverp, unit) 933 struct isa_device *table; 934 struct isa_driver *driverp; 935 int unit; 936{ 937 if (driverp == NULL) /* sanity check */ 938 return NULL; 939 940 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 941 if (table->id_driver == 0) 942 return NULL; 943 944 table++; 945 } 946 947 return table; 948} 949 950/* 951 * Return nonzero if a (masked) irq is pending for a given device. 952 */ 953#if defined(APIC_IO) 954 955int 956isa_irq_pending(dvp) 957 struct isa_device *dvp; 958{ 959 /* read APIC IRR containing the 16 ISA INTerrupts */ 960#if defined(TEST_UPPERPRIO) 961 if ((u_int32_t)dvp->id_irq == APIC_IRQ10) 962 return (int)(apic_base[APIC_IRR2] & 1); 963 else 964#endif /** TEST_UPPERPRIO */ 965 return ((apic_base[APIC_IRR1] & 0x00ffffff) 966 & (u_int32_t)dvp->id_irq) ? 1 : 0; 967} 968 969/* 970 * an 8259 specific routine, 971 * for use by boot probes in certain device drivers. 972 */ 973int 974icu_irq_pending(dvp) 975 struct isa_device *dvp; 976{ 977 unsigned id_irq; 978 id_irq = dvp->id_irq; 979 if (id_irq & 0xff) 980 return (inb(IO_ICU1) & id_irq); 981 return (inb(IO_ICU2) & (id_irq >> 8)); 982} 983 984#else /* APIC_IO */ 985 986int 987isa_irq_pending(dvp) 988 struct isa_device *dvp; 989{ 990 unsigned id_irq; 991 id_irq = dvp->id_irq; 992 if (id_irq & 0xff) 993 return (inb(IO_ICU1) & id_irq); 994 return (inb(IO_ICU2) & (id_irq >> 8)); 995} 996 997#endif /* APIC_IO */ 998 999int 1000update_intr_masks(void) 1001{ 1002 int intr, n=0; 1003 u_int mask,*maskptr; 1004 1005 for (intr=0; intr < ICU_LEN; intr ++) { 1006#if defined(APIC_IO) 1007 /* no 8259 SLAVE to ignore */ 1008#else 1009 if (intr==2) continue; /* ignore 8259 SLAVE output */ 1010#endif /* APIC_IO */ 1011 maskptr = intr_mptr[intr]; 1012 if (!maskptr) continue; 1013 *maskptr |= 1 << intr; 1014 mask = *maskptr; 1015 if (mask != intr_mask[intr]) { 1016#if 0 1017 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 1018 intr, intr_mask[intr], mask, maskptr); 1019#endif 1020 intr_mask[intr]=mask; 1021 n++; 1022 } 1023 1024 } 1025 return (n); 1026} 1027 1028int 1029register_intr(intr, device_id, flags, handler, maskptr, unit) 1030 int intr; 1031 int device_id; 1032 u_int flags; 1033 inthand2_t *handler; 1034 u_int *maskptr; 1035 int unit; 1036{ 1037 char *cp; 1038 u_long ef; 1039 int id; 1040 u_int mask = (maskptr ? *maskptr : 0); 1041 1042#if defined(APIC_IO) 1043 if ((u_int)intr >= ICU_LEN /* no 8259 SLAVE to ignore */ 1044#else 1045 if ((u_int)intr >= ICU_LEN || intr == 2 1046#endif /* APIC_IO */ 1047 || (u_int)device_id >= NR_DEVICES) 1048 return (EINVAL); 1049 if (intr_handler[intr] != isa_strayintr) 1050 return (EBUSY); 1051 ef = read_eflags(); 1052 disable_intr(); 1053 intr_countp[intr] = &intrcnt[device_id]; 1054 intr_handler[intr] = handler; 1055 intr_mptr[intr] = maskptr; 1056 intr_mask[intr] = mask | (1 << intr); 1057 intr_unit[intr] = unit; 1058#if defined(TEST_UPPERPRIO) 1059 if (intr == 10) { 1060 printf("--- setting IRQ10 to IDT64\n"); 1061 setidt(64, 1062 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1063 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1064 } 1065 else { 1066 printf("setting IRQ%02d to IDT%02d\n", intr, ICU_OFFSET+intr); 1067 setidt(ICU_OFFSET + intr, 1068 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1069 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1070 } 1071#else 1072 setidt(ICU_OFFSET + intr, 1073 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1074 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1075#endif /** TEST_UPPERPRIO */ 1076 write_eflags(ef); 1077 for (cp = intrnames, id = 0; id <= device_id; id++) 1078 while (*cp++ != '\0') 1079 ; 1080 if (cp > eintrnames) 1081 return (0); 1082 if (intr < 10) { 1083 cp[-3] = intr + '0'; 1084 cp[-2] = ' '; 1085 } else if (intr < 20) { 1086 cp[-3] = '1'; 1087 cp[-2] = intr - 10 + '0'; 1088 } else { 1089 cp[-3] = '2'; 1090 cp[-2] = intr - 20 + '0'; 1091 } 1092 return (0); 1093} 1094 1095static void 1096register_imask(dvp, mask) 1097 struct isa_device *dvp; 1098 u_int mask; 1099{ 1100 if (dvp->id_alive && dvp->id_irq) { 1101 int intr; 1102 1103 intr = ffs(dvp->id_irq) - 1; 1104 intr_mask[intr] = mask | (1 <<intr); 1105 } 1106 (void) update_intr_masks(); 1107} 1108 1109int 1110unregister_intr(intr, handler) 1111 int intr; 1112 inthand2_t *handler; 1113{ 1114 u_long ef; 1115 1116 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1117 return (EINVAL); 1118 ef = read_eflags(); 1119 disable_intr(); 1120 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1121 intr_handler[intr] = isa_strayintr; 1122 intr_mptr[intr] = NULL; 1123 intr_mask[intr] = HWI_MASK | SWI_MASK; 1124 intr_unit[intr] = intr; 1125 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, 1126 GSEL(GCODE_SEL, SEL_KPL)); 1127 write_eflags(ef); 1128 return (0); 1129} 1130