isa.c revision 25498
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 1.1 1997/05/05 21:54:26 smp Exp smp $ 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#endif /* APIC_IO */ 118}; 119 120static inthand_t *slowintr[ICU_LEN] = { 121 &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 122 &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 123 &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 124 &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 125#if defined(APIC_IO) 126 , &IDTVEC(intr16), &IDTVEC(intr17), &IDTVEC(intr18), &IDTVEC(intr19), 127 &IDTVEC(intr20), &IDTVEC(intr21), &IDTVEC(intr22), &IDTVEC(intr23) 128#endif /* APIC_IO */ 129}; 130 131static void config_isadev __P((struct isa_device *isdp, u_int *mp)); 132static void config_isadev_c __P((struct isa_device *isdp, u_int *mp, 133 int reconfig)); 134static void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 135 int item, char const *whatnot, char const *reason, 136 char const *format)); 137static int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 138 u_int checkbits)); 139static int isa_dmarangecheck __P((caddr_t va, u_int length, int chan)); 140static inthand2_t isa_strayintr; 141static void register_imask __P((struct isa_device *dvp, u_int mask)); 142 143/* 144 * print a conflict message 145 */ 146static void 147conflict(dvp, tmpdvp, item, whatnot, reason, format) 148 struct isa_device *dvp; 149 struct isa_device *tmpdvp; 150 int item; 151 char const *whatnot; 152 char const *reason; 153 char const *format; 154{ 155 printf("%s%d not %sed due to %s conflict with %s%d at ", 156 dvp->id_driver->name, dvp->id_unit, whatnot, reason, 157 tmpdvp->id_driver->name, tmpdvp->id_unit); 158 printf(format, item); 159 printf("\n"); 160} 161 162/* 163 * Check to see if things are already in use, like IRQ's, I/O addresses 164 * and Memory addresses. 165 */ 166static int 167haveseen(dvp, tmpdvp, checkbits) 168 struct isa_device *dvp; 169 struct isa_device *tmpdvp; 170 u_int checkbits; 171{ 172 /* 173 * Only check against devices that have already been found and are not 174 * unilaterally allowed to conflict anyway. 175 */ 176 if (tmpdvp->id_alive && !dvp->id_conflicts) { 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 */ 242int 243haveseen_isadev(dvp, checkbits) 244 struct isa_device *dvp; 245 u_int checkbits; 246{ 247 struct isa_device *tmpdvp; 248 int status = 0; 249 250 for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 251 status |= haveseen(dvp, tmpdvp, checkbits); 252 if (status) 253 return status; 254 } 255 for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 256 status |= haveseen(dvp, tmpdvp, checkbits); 257 if (status) 258 return status; 259 } 260 for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 261 status |= haveseen(dvp, tmpdvp, checkbits); 262 if (status) 263 return status; 264 } 265 for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 266 status |= haveseen(dvp, tmpdvp, checkbits); 267 if (status) 268 return status; 269 } 270 return(status); 271} 272 273/* 274 * Configure all ISA devices 275 */ 276void 277isa_configure() { 278 struct isa_device *dvp; 279 280 splhigh(); 281 printf("Probing for devices on the ISA bus:\n"); 282 /* First probe all the sensitive probes */ 283 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 284 if (dvp->id_driver->sensitive_hw) 285 config_isadev(dvp, &tty_imask); 286 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 287 if (dvp->id_driver->sensitive_hw) 288 config_isadev(dvp, &bio_imask); 289 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 290 if (dvp->id_driver->sensitive_hw) 291 config_isadev(dvp, &net_imask); 292 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 293 if (dvp->id_driver->sensitive_hw) 294 config_isadev(dvp, (u_int *)NULL); 295 296 /* Then all the bad ones */ 297 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 298 if (!dvp->id_driver->sensitive_hw) 299 config_isadev(dvp, &tty_imask); 300 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 301 if (!dvp->id_driver->sensitive_hw) 302 config_isadev(dvp, &bio_imask); 303 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 304 if (!dvp->id_driver->sensitive_hw) 305 config_isadev(dvp, &net_imask); 306 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 307 if (!dvp->id_driver->sensitive_hw) 308 config_isadev(dvp, (u_int *)NULL); 309 310 bio_imask |= SWI_CLOCK_MASK; 311 net_imask |= SWI_NET_MASK; 312 tty_imask |= SWI_TTY_MASK; 313 314/* 315 * XXX we should really add the tty device to net_imask when the line is 316 * switched to SLIPDISC, and then remove it when it is switched away from 317 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 318 * of them is running slip. 319 * 320 * XXX actually, blocking all ttys during a splimp doesn't matter so much 321 * with sio because the serial interrupt layer doesn't use tty_imask. Only 322 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 323 * during spltty. 324 */ 325#include "sl.h" 326#if NSL > 0 327 net_imask |= tty_imask; 328 tty_imask = net_imask; 329#endif 330 331 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 332 333 if (bootverbose) 334 printf("imasks: bio %x, tty %x, net %x\n", 335 bio_imask, tty_imask, net_imask); 336 337 /* 338 * Finish initializing intr_mask[]. Note that the partly 339 * constructed masks aren't actually used since we're at splhigh. 340 * For fully dynamic initialization, register_intr() and 341 * unregister_intr() will have to adjust the masks for _all_ 342 * interrupts and for tty_imask, etc. 343 */ 344 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 345 register_imask(dvp, tty_imask); 346 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 347 register_imask(dvp, bio_imask); 348 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 349 register_imask(dvp, net_imask); 350 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 351 register_imask(dvp, SWI_CLOCK_MASK); 352 spl0(); 353} 354 355/* 356 * Configure an ISA device. 357 */ 358 359 360static void 361config_isadev(isdp, mp) 362 struct isa_device *isdp; 363 u_int *mp; 364{ 365 config_isadev_c(isdp, mp, 0); 366} 367 368void 369reconfig_isadev(isdp, mp) 370 struct isa_device *isdp; 371 u_int *mp; 372{ 373 config_isadev_c(isdp, mp, 1); 374} 375 376static void 377config_isadev_c(isdp, mp, reconfig) 378 struct isa_device *isdp; 379 u_int *mp; 380 int reconfig; 381{ 382 u_int checkbits; 383 int id_alive; 384 int last_alive; 385 struct isa_driver *dp = isdp->id_driver; 386 387 if (!isdp->id_enabled) { 388 printf("%s%d: disabled, not probed.\n", 389 dp->name, isdp->id_unit); 390 return; 391 } 392 checkbits = CC_DRQ | CC_IOADDR | CC_MEMADDR; 393 if (!reconfig && haveseen_isadev(isdp, checkbits)) 394 return; 395 if (!reconfig && isdp->id_maddr) { 396 isdp->id_maddr -= ISA_HOLE_START; 397 isdp->id_maddr += atdevbase; 398 } 399 if (reconfig) { 400 last_alive = isdp->id_alive; 401 isdp->id_reconfig = 1; 402 } 403 else { 404 last_alive = 0; 405 isdp->id_reconfig = 0; 406 } 407 id_alive = (*dp->probe)(isdp); 408 if (id_alive) { 409 /* 410 * Only print the I/O address range if id_alive != -1 411 * Right now this is a temporary fix just for the new 412 * NPX code so that if it finds a 486 that can use trap 413 * 16 it will not report I/O addresses. 414 * Rod Grimes 04/26/94 415 */ 416 if (!isdp->id_reconfig) { 417 printf("%s%d", dp->name, isdp->id_unit); 418 if (id_alive != -1) { 419 if (isdp->id_iobase == -1) 420 printf(" at ?"); 421 else { 422 printf(" at 0x%x", isdp->id_iobase); 423 if (isdp->id_iobase + id_alive - 1 != 424 isdp->id_iobase) { 425 printf("-0x%x", 426 isdp->id_iobase + id_alive - 1); 427 } 428 } 429 } 430 if (isdp->id_irq) 431 printf(" irq %d", ffs(isdp->id_irq) - 1); 432 if (isdp->id_drq != -1) 433 printf(" drq %d", isdp->id_drq); 434 if (isdp->id_maddr) 435 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 436 if (isdp->id_msize) 437 printf(" msize %d", isdp->id_msize); 438 if (isdp->id_flags) 439 printf(" flags 0x%x", isdp->id_flags); 440 if (isdp->id_iobase && !(isdp->id_iobase & 0xf300)) { 441 printf(" on motherboard"); 442 } else if (isdp->id_iobase >= 0x1000 && 443 !(isdp->id_iobase & 0x300)) { 444 printf (" on eisa slot %d", 445 isdp->id_iobase >> 12); 446 } else { 447 printf (" on isa"); 448 } 449 printf("\n"); 450 /* 451 * Check for conflicts again. The driver may have 452 * changed *dvp. We should weaken the early check 453 * since the driver may have been able to change 454 * *dvp to avoid conflicts if given a chance. We 455 * already skip the early check for IRQs and force 456 * a check for IRQs in the next group of checks. 457 */ 458 checkbits |= CC_IRQ; 459 if (haveseen_isadev(isdp, checkbits)) 460 return; 461 isdp->id_alive = id_alive; 462 } 463 (*dp->attach)(isdp); 464 if (isdp->id_irq) { 465#if defined(APIC_IO) 466 /* 467 * Some motherboards use upper IRQs for traditional 468 * ISA INTerrupt sources. In particular we have 469 * seen the secondary IDE connected to IRQ20. 470 * This code detects and fixes this situation. 471 */ 472 u_int apic_mask; 473 int rirq; 474 475 apic_mask = get_isa_apic_mask( isdp->id_irq ); 476 if ( apic_mask != isdp->id_irq ) { 477 rirq = ffs( isdp->id_irq ) - 1; 478 isdp->id_irq = apic_mask; 479 undirect_isa_irq( rirq ); /* free for ISA */ 480 } 481#endif /* APIC_IO */ 482 if (mp) 483 INTRMASK(*mp, isdp->id_irq); 484 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 485 isdp->id_ri_flags, isdp->id_intr, 486 mp, isdp->id_unit); 487 INTREN(isdp->id_irq); 488 } 489 } else { 490 if (isdp->id_reconfig) { 491 (*dp->attach)(isdp); /* reconfiguration attach */ 492 } 493 if (!last_alive) { 494 if (!isdp->id_reconfig) { 495 printf("%s%d not found", 496 dp->name, isdp->id_unit); 497 if (isdp->id_iobase != -1) 498 printf(" at 0x%x", isdp->id_iobase); 499 printf("\n"); 500 } 501 } 502 else { 503 /* This code has not been tested.... */ 504 if (isdp->id_irq) { 505 INTRDIS(isdp->id_irq); 506 unregister_intr(ffs(isdp->id_irq) - 1, 507 isdp->id_intr); 508 if (mp) 509 INTRUNMASK(*mp, isdp->id_irq); 510 } 511 } 512 } 513} 514 515/* 516 * Fill in default interrupt table (in case of spuruious interrupt 517 * during configuration of kernel, setup interrupt control unit 518 */ 519void 520isa_defaultirq() 521{ 522 int i; 523 524 /* icu vectors */ 525 for (i = 0; i < ICU_LEN; i++) 526 unregister_intr(i, (inthand2_t *)NULL); 527 528 /* initialize 8259's */ 529 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 530 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 531 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 532#ifdef AUTO_EOI_1 533 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 534#else 535 outb(IO_ICU1+1, 1); /* 8086 mode */ 536#endif 537 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 538 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 539 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 540 541 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 542 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 543 outb(IO_ICU2+1,2); /* my slave id is 2 */ 544#ifdef AUTO_EOI_2 545 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 546#else 547 outb(IO_ICU2+1,1); /* 8086 mode */ 548#endif 549 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 550 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 551} 552 553static caddr_t dma_bouncebuf[8]; 554static u_int dma_bouncebufsize[8]; 555static u_int8_t dma_bounced = 0; 556static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 557static u_int8_t dma_inuse = 0; /* User for acquire/release */ 558 559#define VALID_DMA_MASK (7) 560 561/* high byte of address is stored in this port for i-th dma channel */ 562static int dmapageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 563 564/* 565 * Setup a DMA channel's bounce buffer. 566 */ 567void 568isa_dmainit(chan, bouncebufsize) 569 int chan; 570 u_int bouncebufsize; 571{ 572 void *buf; 573 574#ifdef DIAGNOSTIC 575 if (chan & ~VALID_DMA_MASK) 576 panic("isa_dmainit: channel out of range"); 577 578 if (dma_bouncebuf[chan] != NULL) 579 panic("isa_dmainit: impossible request"); 580#endif 581 582 dma_bouncebufsize[chan] = bouncebufsize; 583 584 /* Try malloc() first. It works better if it works. */ 585 buf = malloc(bouncebufsize, M_DEVBUF, M_NOWAIT); 586 if (buf != NULL) { 587 if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 588 dma_bouncebuf[chan] = buf; 589 return; 590 } 591 free(buf, M_DEVBUF); 592 } 593 buf = contigmalloc(bouncebufsize, M_DEVBUF, M_NOWAIT, 0ul, 0xfffffful, 594 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 595 if (buf == NULL) 596 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 597 else 598 dma_bouncebuf[chan] = buf; 599} 600 601/* 602 * Register a DMA channel's usage. Usually called from a device driver 603 * in open() or during it's initialization. 604 */ 605int 606isa_dma_acquire(chan) 607 int chan; 608{ 609#ifdef DIAGNOSTIC 610 if (chan & ~VALID_DMA_MASK) 611 panic("isa_dma_acquire: channel out of range"); 612#endif 613 614 if (dma_inuse & (1 << chan)) { 615 printf("isa_dma_acquire: channel %d already in use\n", chan); 616 return (EBUSY); 617 } 618 dma_inuse |= (1 << chan); 619 620 return (0); 621} 622 623/* 624 * Unregister a DMA channel's usage. Usually called from a device driver 625 * during close() or during it's shutdown. 626 */ 627void 628isa_dma_release(chan) 629 int chan; 630{ 631#ifdef DIAGNOSTIC 632 if (chan & ~VALID_DMA_MASK) 633 panic("isa_dma_release: channel out of range"); 634 635 if (dma_inuse & (1 << chan) == 0) 636 printf("isa_dma_release: channel %d not in use\n", chan); 637#endif 638 639 if (dma_busy & (1 << chan)) { 640 dma_busy &= ~(1 << chan); 641 /* 642 * XXX We should also do "dma_bounced &= (1 << chan);" 643 * because we are acting on behalf of isa_dmadone() which 644 * was not called to end the last DMA operation. This does 645 * not matter now, but it may in the future. 646 */ 647 } 648 649 dma_inuse &= ~(1 << chan); 650} 651 652/* 653 * isa_dmacascade(): program 8237 DMA controller channel to accept 654 * external dma control by a board. 655 */ 656void isa_dmacascade(chan) 657 int chan; 658{ 659#ifdef DIAGNOSTIC 660 if (chan & ~VALID_DMA_MASK) 661 panic("isa_dmacascade: channel out of range"); 662#endif 663 664 /* set dma channel mode, and set dma channel mode */ 665 if ((chan & 4) == 0) { 666 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 667 outb(DMA1_SMSK, chan); 668 } else { 669 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 670 outb(DMA2_SMSK, chan & 3); 671 } 672} 673 674/* 675 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 676 * problems by using a bounce buffer. 677 */ 678void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 679{ 680 vm_offset_t phys; 681 int waport; 682 caddr_t newaddr; 683 684#ifdef DIAGNOSTIC 685 if (chan & ~VALID_DMA_MASK) 686 panic("isa_dmastart: channel out of range"); 687 688 if ((chan < 4 && nbytes > (1<<16)) 689 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 690 panic("isa_dmastart: impossible request"); 691 692 if (dma_inuse & (1 << chan) == 0) 693 printf("isa_dmastart: channel %d not acquired\n", chan); 694#endif 695 696#if 0 697 /* 698 * XXX This should be checked, but drivers like ad1848 only call 699 * isa_dmastart() once because they use Auto DMA mode. If we 700 * leave this in, drivers that do this will print this continuously. 701 */ 702 if (dma_busy & (1 << chan)) 703 printf("isa_dmastart: channel %d busy\n", chan); 704#endif 705 706 dma_busy |= (1 << chan); 707 708 if (isa_dmarangecheck(addr, nbytes, chan)) { 709 if (dma_bouncebuf[chan] == NULL 710 || dma_bouncebufsize[chan] < nbytes) 711 panic("isa_dmastart: bad bounce buffer"); 712 dma_bounced |= (1 << chan); 713 newaddr = dma_bouncebuf[chan]; 714 715 /* copy bounce buffer on write */ 716 if (!(flags & B_READ)) 717 bcopy(addr, newaddr, nbytes); 718 addr = newaddr; 719 } 720 721 /* translate to physical */ 722 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 723 724 if ((chan & 4) == 0) { 725 /* 726 * Program one of DMA channels 0..3. These are 727 * byte mode channels. 728 */ 729 /* set dma channel mode, and reset address ff */ 730 731 /* If B_RAW flag is set, then use autoinitialise mode */ 732 if (flags & B_RAW) { 733 if (flags & B_READ) 734 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 735 else 736 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 737 } 738 else 739 if (flags & B_READ) 740 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 741 else 742 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 743 outb(DMA1_FFC, 0); 744 745 /* send start address */ 746 waport = DMA1_CHN(chan); 747 outb(waport, phys); 748 outb(waport, phys>>8); 749 outb(dmapageport[chan], phys>>16); 750 751 /* send count */ 752 outb(waport + 1, --nbytes); 753 outb(waport + 1, nbytes>>8); 754 755 /* unmask channel */ 756 outb(DMA1_SMSK, chan); 757 } else { 758 /* 759 * Program one of DMA channels 4..7. These are 760 * word mode channels. 761 */ 762 /* set dma channel mode, and reset address ff */ 763 764 /* If B_RAW flag is set, then use autoinitialise mode */ 765 if (flags & B_RAW) { 766 if (flags & B_READ) 767 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 768 else 769 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 770 } 771 else 772 if (flags & B_READ) 773 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 774 else 775 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 776 outb(DMA2_FFC, 0); 777 778 /* send start address */ 779 waport = DMA2_CHN(chan - 4); 780 outb(waport, phys>>1); 781 outb(waport, phys>>9); 782 outb(dmapageport[chan], phys>>16); 783 784 /* send count */ 785 nbytes >>= 1; 786 outb(waport + 2, --nbytes); 787 outb(waport + 2, nbytes>>8); 788 789 /* unmask channel */ 790 outb(DMA2_SMSK, chan & 3); 791 } 792} 793 794void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 795{ 796#ifdef DIAGNOSTIC 797 if (chan & ~VALID_DMA_MASK) 798 panic("isa_dmadone: channel out of range"); 799 800 if (dma_inuse & (1 << chan) == 0) 801 printf("isa_dmadone: channel %d not acquired\n", chan); 802#endif 803 804#if 0 805 /* 806 * XXX This should be checked, but drivers like ad1848 only call 807 * isa_dmastart() once because they use Auto DMA mode. If we 808 * leave this in, drivers that do this will print this continuously. 809 */ 810 if (dma_busy & (1 << chan) == 0) 811 printf("isa_dmadone: channel %d not busy\n", chan); 812#endif 813 814 if (dma_bounced & (1 << chan)) { 815 /* copy bounce buffer on read */ 816 if (flags & B_READ) 817 bcopy(dma_bouncebuf[chan], addr, nbytes); 818 819 dma_bounced &= ~(1 << chan); 820 } 821 dma_busy &= ~(1 << chan); 822} 823 824/* 825 * Check for problems with the address range of a DMA transfer 826 * (non-contiguous physical pages, outside of bus address space, 827 * crossing DMA page boundaries). 828 * Return true if special handling needed. 829 */ 830 831static int 832isa_dmarangecheck(caddr_t va, u_int length, int chan) { 833 vm_offset_t phys, priorpage = 0, endva; 834 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 835 836 endva = (vm_offset_t)round_page(va + length); 837 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 838 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 839#define ISARAM_END RAM_END 840 if (phys == 0) 841 panic("isa_dmacheck: no physical page present"); 842 if (phys >= ISARAM_END) 843 return (1); 844 if (priorpage) { 845 if (priorpage + PAGE_SIZE != phys) 846 return (1); 847 /* check if crossing a DMA page boundary */ 848 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 849 return (1); 850 } 851 priorpage = phys; 852 } 853 return (0); 854} 855 856#define NMI_PARITY (1 << 7) 857#define NMI_IOCHAN (1 << 6) 858#define ENMI_WATCHDOG (1 << 7) 859#define ENMI_BUSTIMER (1 << 6) 860#define ENMI_IOSTATUS (1 << 5) 861 862/* 863 * Handle a NMI, possibly a machine check. 864 * return true to panic system, false to ignore. 865 */ 866int 867isa_nmi(cd) 868 int cd; 869{ 870 int isa_port = inb(0x61); 871 int eisa_port = inb(0x461); 872 if(isa_port & NMI_PARITY) { 873 panic("RAM parity error, likely hardware failure."); 874 } else if(isa_port & NMI_IOCHAN) { 875 panic("I/O channel check, likely hardware failure."); 876 } else if(eisa_port & ENMI_WATCHDOG) { 877 panic("EISA watchdog timer expired, likely hardware failure."); 878 } else if(eisa_port & ENMI_BUSTIMER) { 879 panic("EISA bus timeout, likely hardware failure."); 880 } else if(eisa_port & ENMI_IOSTATUS) { 881 panic("EISA I/O port status error."); 882 } else { 883 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 884 return(0); 885 } 886} 887 888/* 889 * Caught a stray interrupt, notify 890 */ 891static void 892isa_strayintr(d) 893 int d; 894{ 895 896 /* DON'T BOTHER FOR NOW! */ 897 /* for some reason, we get bursts of intr #7, even if not enabled! */ 898 /* 899 * Well the reason you got bursts of intr #7 is because someone 900 * raised an interrupt line and dropped it before the 8259 could 901 * prioritize it. This is documented in the intel data book. This 902 * means you have BAD hardware! I have changed this so that only 903 * the first 5 get logged, then it quits logging them, and puts 904 * out a special message. rgrimes 3/25/1993 905 */ 906 /* 907 * XXX TODO print a different message for #7 if it is for a 908 * glitch. Glitches can be distinguished from real #7's by 909 * testing that the in-service bit is _not_ set. The test 910 * must be done before sending an EOI so it can't be done if 911 * we are using AUTO_EOI_1. 912 */ 913 if (intrcnt[NR_DEVICES + d] <= 5) 914 log(LOG_ERR, "stray irq %d\n", d); 915 if (intrcnt[NR_DEVICES + d] == 5) 916 log(LOG_CRIT, 917 "too many stray irq %d's; not logging any more\n", d); 918} 919 920/* 921 * Find the highest priority enabled display device. Since we can't 922 * distinguish display devices from ttys, depend on display devices 923 * being sensitive and before sensitive non-display devices (if any) 924 * in isa_devtab_tty. 925 * 926 * XXX we should add capability flags IAMDISPLAY and ISUPPORTCONSOLES. 927 */ 928struct isa_device * 929find_display() 930{ 931 struct isa_device *dvp; 932 933 for (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) 934 if (dvp->id_driver->sensitive_hw && dvp->id_enabled) 935 return (dvp); 936 return (NULL); 937} 938 939/* 940 * find an ISA device in a given isa_devtab_* table, given 941 * the table to search, the expected id_driver entry, and the unit number. 942 * 943 * this function is defined in isa_device.h, and this location is debatable; 944 * i put it there because it's useless w/o, and directly operates on 945 * the other stuff in that file. 946 * 947 */ 948 949struct isa_device *find_isadev(table, driverp, unit) 950 struct isa_device *table; 951 struct isa_driver *driverp; 952 int unit; 953{ 954 if (driverp == NULL) /* sanity check */ 955 return NULL; 956 957 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 958 if (table->id_driver == 0) 959 return NULL; 960 961 table++; 962 } 963 964 return table; 965} 966 967/* 968 * Return nonzero if a (masked) irq is pending for a given device. 969 */ 970#if defined(APIC_IO) 971 972int 973isa_irq_pending(dvp) 974 struct isa_device *dvp; 975{ 976 /* read APIC IRR containing the 16 ISA INTerrupts */ 977 return ((apic_base[APIC_IRR1] & 0x00ffffff) 978 & (u_int32_t)dvp->id_irq) ? 1 : 0; 979} 980 981/* 982 * an 8259 specific routine, 983 * for use by boot probes in certain device drivers. 984 */ 985int 986icu_irq_pending(dvp) 987 struct isa_device *dvp; 988{ 989 unsigned id_irq; 990 id_irq = dvp->id_irq; 991 if (id_irq & 0xff) 992 return (inb(IO_ICU1) & id_irq); 993 return (inb(IO_ICU2) & (id_irq >> 8)); 994} 995 996#else /* APIC_IO */ 997 998int 999isa_irq_pending(dvp) 1000 struct isa_device *dvp; 1001{ 1002 unsigned id_irq; 1003 id_irq = dvp->id_irq; 1004 if (id_irq & 0xff) 1005 return (inb(IO_ICU1) & id_irq); 1006 return (inb(IO_ICU2) & (id_irq >> 8)); 1007} 1008 1009#endif /* APIC_IO */ 1010 1011int 1012update_intr_masks(void) 1013{ 1014 int intr, n=0; 1015 u_int mask,*maskptr; 1016 1017 for (intr=0; intr < ICU_LEN; intr ++) { 1018#if defined(APIC_IO) 1019 /* no 8259 SLAVE to ignore */ 1020#else 1021 if (intr==2) continue; /* ignore 8259 SLAVE output */ 1022#endif /* APIC_IO */ 1023 maskptr = intr_mptr[intr]; 1024 if (!maskptr) continue; 1025 *maskptr |= 1 << intr; 1026 mask = *maskptr; 1027 if (mask != intr_mask[intr]) { 1028#if 0 1029 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 1030 intr, intr_mask[intr], mask, maskptr); 1031#endif 1032 intr_mask[intr]=mask; 1033 n++; 1034 } 1035 1036 } 1037 return (n); 1038} 1039 1040int 1041register_intr(intr, device_id, flags, handler, maskptr, unit) 1042 int intr; 1043 int device_id; 1044 u_int flags; 1045 inthand2_t *handler; 1046 u_int *maskptr; 1047 int unit; 1048{ 1049 char *cp; 1050 u_long ef; 1051 int id; 1052 u_int mask = (maskptr ? *maskptr : 0); 1053 1054#if defined(APIC_IO) 1055 if ((u_int)intr >= ICU_LEN /* no 8259 SLAVE to ignore */ 1056#else 1057 if ((u_int)intr >= ICU_LEN || intr == 2 1058#endif /* APIC_IO */ 1059 || (u_int)device_id >= NR_DEVICES) 1060 return (EINVAL); 1061 if (intr_handler[intr] != isa_strayintr) 1062 return (EBUSY); 1063 ef = read_eflags(); 1064 disable_intr(); 1065 intr_countp[intr] = &intrcnt[device_id]; 1066 intr_handler[intr] = handler; 1067 intr_mptr[intr] = maskptr; 1068 intr_mask[intr] = mask | (1 << intr); 1069 intr_unit[intr] = unit; 1070 setidt(ICU_OFFSET + intr, 1071 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1072 SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); 1073 write_eflags(ef); 1074 for (cp = intrnames, id = 0; id <= device_id; id++) 1075 while (*cp++ != '\0') 1076 ; 1077 if (cp > eintrnames) 1078 return (0); 1079 if (intr < 10) { 1080 cp[-3] = intr + '0'; 1081 cp[-2] = ' '; 1082 } else if (intr < 20) { 1083 cp[-3] = '1'; 1084 cp[-2] = intr - 10 + '0'; 1085 } else { 1086 cp[-3] = '2'; 1087 cp[-2] = intr - 20 + '0'; 1088 } 1089 return (0); 1090} 1091 1092static void 1093register_imask(dvp, mask) 1094 struct isa_device *dvp; 1095 u_int mask; 1096{ 1097 if (dvp->id_alive && dvp->id_irq) { 1098 int intr; 1099 1100 intr = ffs(dvp->id_irq) - 1; 1101 intr_mask[intr] = mask | (1 <<intr); 1102 } 1103 (void) update_intr_masks(); 1104} 1105 1106int 1107unregister_intr(intr, handler) 1108 int intr; 1109 inthand2_t *handler; 1110{ 1111 u_long ef; 1112 1113 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1114 return (EINVAL); 1115 ef = read_eflags(); 1116 disable_intr(); 1117 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1118 intr_handler[intr] = isa_strayintr; 1119 intr_mptr[intr] = NULL; 1120 intr_mask[intr] = HWI_MASK | SWI_MASK; 1121 intr_unit[intr] = intr; 1122 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, 1123 GSEL(GCODE_SEL, SEL_KPL)); 1124 write_eflags(ef); 1125 return (0); 1126} 1127