isa.c revision 7345
1191783Srmacklem/*- 2191783Srmacklem * Copyright (c) 1991 The Regents of the University of California. 3191783Srmacklem * All rights reserved. 4191783Srmacklem * 5191783Srmacklem * This code is derived from software contributed to Berkeley by 6191783Srmacklem * William Jolitz. 7191783Srmacklem * 8191783Srmacklem * Redistribution and use in source and binary forms, with or without 9191783Srmacklem * modification, are permitted provided that the following conditions 10191783Srmacklem * are met: 11191783Srmacklem * 1. Redistributions of source code must retain the above copyright 12191783Srmacklem * notice, this list of conditions and the following disclaimer. 13191783Srmacklem * 2. Redistributions in binary form must reproduce the above copyright 14191783Srmacklem * notice, this list of conditions and the following disclaimer in the 15191783Srmacklem * documentation and/or other materials provided with the distribution. 16191783Srmacklem * 3. All advertising materials mentioning features or use of this software 17191783Srmacklem * must display the following acknowledgement: 18191783Srmacklem * This product includes software developed by the University of 19191783Srmacklem * California, Berkeley and its contributors. 20191783Srmacklem * 4. Neither the name of the University nor the names of its contributors 21191783Srmacklem * may be used to endorse or promote products derived from this software 22191783Srmacklem * without specific prior written permission. 23191783Srmacklem * 24191783Srmacklem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25191783Srmacklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26191783Srmacklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27191783Srmacklem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28191783Srmacklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29191783Srmacklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30191783Srmacklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31191783Srmacklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32191783Srmacklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33191783Srmacklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34191783Srmacklem * SUCH DAMAGE. 35191783Srmacklem * 36191783Srmacklem * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 37191783Srmacklem * $Id: isa.c,v 1.40 1995/03/16 17:31:18 se Exp $ 38191783Srmacklem */ 39191783Srmacklem 40191783Srmacklem/* 41191783Srmacklem * code to manage AT bus 42191783Srmacklem * 43191783Srmacklem * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44191783Srmacklem * Fixed uninitialized variable problem and added code to deal 45191783Srmacklem * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46191783Srmacklem * mode DMA count compution and reorganized DMA setup code in 47191783Srmacklem * isa_dmastart() 48191783Srmacklem */ 49191783Srmacklem 50191783Srmacklem#include <sys/param.h> 51191783Srmacklem#include <sys/systm.h> /* isn't it a joy */ 52191783Srmacklem#include <sys/kernel.h> /* to have three of these */ 53191783Srmacklem#include <sys/proc.h> 54191783Srmacklem#include <sys/conf.h> 55191783Srmacklem#include <sys/file.h> 56191783Srmacklem#include <sys/buf.h> 57191783Srmacklem#include <sys/uio.h> 58191783Srmacklem#include <sys/syslog.h> 59191783Srmacklem#include <sys/malloc.h> 60191783Srmacklem#include <sys/rlist.h> 61191783Srmacklem#include <machine/segments.h> 62191783Srmacklem#include <vm/vm.h> 63191783Srmacklem#include <machine/spl.h> 64191783Srmacklem#include <i386/isa/isa_device.h> 65191783Srmacklem#include <i386/isa/isa.h> 66191783Srmacklem#include <i386/isa/icu.h> 67192121Srmacklem#include <i386/isa/ic/i8237.h> 68191783Srmacklem#include <i386/isa/ic/i8042.h> 69191783Srmacklem#include <sys/devconf.h> 70191783Srmacklem#include "vector.h" 71191783Srmacklem 72191783Srmacklem/* 73191783Srmacklem** Register definitions for DMA controller 1 (channels 0..3): 74191783Srmacklem*/ 75191783Srmacklem#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 76191783Srmacklem#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 77191783Srmacklem#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 78191783Srmacklem#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 79191783Srmacklem 80191783Srmacklem/* 81191783Srmacklem** Register definitions for DMA controller 2 (channels 4..7): 82191783Srmacklem*/ 83191783Srmacklem#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 84191783Srmacklem#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 85191783Srmacklem#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 86191783Srmacklem#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 87191783Srmacklem 88191783Srmacklem/* 89191783Srmacklem * Bits to specify the type and amount of conflict checking. 90191783Srmacklem */ 91191783Srmacklem#define CC_ATTACH (1 << 0) 92191783Srmacklem#define CC_DRQ (1 << 1) 93191783Srmacklem#define CC_IOADDR (1 << 2) 94191783Srmacklem#define CC_IRQ (1 << 3) 95192121Srmacklem#define CC_MEMADDR (1 << 4) 96191783Srmacklem 97191783Srmacklem/* 98191783Srmacklem * XXX these defines should be in a central place. 99191783Srmacklem */ 100191783Srmacklem#define read_eflags() ({u_long ef; \ 101192121Srmacklem __asm("pushfl; popl %0" : "=a" (ef)); \ 102192121Srmacklem ef; }) 103191783Srmacklem#define write_eflags(ef) __asm("pushl %0; popfl" : : "a" ((u_long)(ef))) 104191783Srmacklem 105191783Srmacklemu_long *intr_countp[ICU_LEN]; 106191783Srmackleminthand2_t *intr_handler[ICU_LEN]; 107191783Srmacklemu_int intr_mask[ICU_LEN]; 108191783Srmacklemu_int* intr_mptr[ICU_LEN]; 109191783Srmacklemint intr_unit[ICU_LEN]; 110191783Srmacklem 111191783Srmacklemstruct kern_devconf kdc_isa0 = { 112191783Srmacklem 0, 0, 0, /* filled in by dev_attach */ 113191783Srmacklem "isa", 0, { MDDT_BUS, 0 }, 114191783Srmacklem 0, 0, 0, BUS_EXTERNALLEN, 115191783Srmacklem 0, /* no parent yet; parent should be CPU */ 116191783Srmacklem 0, /* no parentdata */ 117191783Srmacklem DC_BUSY, /* busses are always busy */ 118191783Srmacklem "ISA or EISA bus" 119191783Srmacklem}; 120191783Srmacklem 121191783Srmacklemstatic inthand_t *fastintr[ICU_LEN] = { 122191783Srmacklem &IDTVEC(fastintr0), &IDTVEC(fastintr1), 123191783Srmacklem &IDTVEC(fastintr2), &IDTVEC(fastintr3), 124191783Srmacklem &IDTVEC(fastintr4), &IDTVEC(fastintr5), 125191783Srmacklem &IDTVEC(fastintr6), &IDTVEC(fastintr7), 126191783Srmacklem &IDTVEC(fastintr8), &IDTVEC(fastintr9), 127191783Srmacklem &IDTVEC(fastintr10), &IDTVEC(fastintr11), 128191783Srmacklem &IDTVEC(fastintr12), &IDTVEC(fastintr13), 129191783Srmacklem &IDTVEC(fastintr14), &IDTVEC(fastintr15) 130191783Srmacklem}; 131191783Srmacklem 132191783Srmacklemstatic inthand_t *slowintr[ICU_LEN] = { 133191783Srmacklem &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), 134191783Srmacklem &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), 135191783Srmacklem &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), 136191783Srmacklem &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15) 137191783Srmacklem}; 138191783Srmacklem 139191783Srmacklemstatic void config_isadev __P((struct isa_device *isdp, u_int *mp)); 140191783Srmacklemstatic void conflict __P((struct isa_device *dvp, struct isa_device *tmpdvp, 141191783Srmacklem int item, char const *whatnot, char const *reason, 142191783Srmacklem char const *format)); 143191783Srmacklemstatic int haveseen __P((struct isa_device *dvp, struct isa_device *tmpdvp, 144191783Srmacklem u_int checkbits)); 145191783Srmacklemstatic int haveseen_isadev __P((struct isa_device *dvp, u_int checkbits)); 146191783Srmacklemstatic inthand2_t isa_strayintr; 147191783Srmacklemstatic void register_imask __P((struct isa_device *dvp, u_int mask)); 148191783Srmacklem 149191783Srmacklem/* 150191783Srmacklem * print a conflict message 151191783Srmacklem */ 152191783Srmacklemstatic void 153191783Srmacklemconflict(dvp, tmpdvp, item, whatnot, reason, format) 154191783Srmacklem struct isa_device *dvp; 155191783Srmacklem struct isa_device *tmpdvp; 156191783Srmacklem int item; 157191783Srmacklem char const *whatnot; 158191783Srmacklem char const *reason; 159191783Srmacklem char const *format; 160191783Srmacklem{ 161191783Srmacklem printf("%s%d not %sed due to %s conflict with %s%d at ", 162191783Srmacklem dvp->id_driver->name, dvp->id_unit, whatnot, reason, 163191783Srmacklem tmpdvp->id_driver->name, tmpdvp->id_unit); 164191783Srmacklem printf(format, item); 165191783Srmacklem printf("\n"); 166191783Srmacklem} 167191783Srmacklem 168191783Srmacklem/* 169191783Srmacklem * Check to see if things are alread in use, like IRQ's, I/O addresses 170191783Srmacklem * and Memory addresses. 171191783Srmacklem */ 172191783Srmacklemstatic int 173191783Srmacklemhaveseen(dvp, tmpdvp, checkbits) 174191783Srmacklem struct isa_device *dvp; 175191783Srmacklem struct isa_device *tmpdvp; 176191783Srmacklem u_int checkbits; 177191783Srmacklem{ 178191783Srmacklem /* 179191783Srmacklem * Only check against devices that have already been found 180191783Srmacklem */ 181191783Srmacklem if (tmpdvp->id_alive) { 182191783Srmacklem char const *whatnot; 183191783Srmacklem 184191783Srmacklem whatnot = checkbits & CC_ATTACH ? "attach" : "prob"; 185191783Srmacklem /* 186191783Srmacklem * Check for I/O address conflict. We can only check the 187191783Srmacklem * starting address of the device against the range of the 188191783Srmacklem * device that has already been probed since we do not 189191783Srmacklem * know how many I/O addresses this device uses. 190191783Srmacklem */ 191191783Srmacklem if (checkbits & CC_IOADDR && tmpdvp->id_alive != -1) { 192191783Srmacklem if ((dvp->id_iobase >= tmpdvp->id_iobase) && 193191783Srmacklem (dvp->id_iobase <= 194191783Srmacklem (tmpdvp->id_iobase + tmpdvp->id_alive - 1))) { 195194408Srmacklem conflict(dvp, tmpdvp, dvp->id_iobase, whatnot, 196191783Srmacklem "I/O address", "0x%x"); 197191783Srmacklem return 1; 198191783Srmacklem } 199191783Srmacklem } 200191783Srmacklem /* 201191783Srmacklem * Check for Memory address conflict. We can check for 202191783Srmacklem * range overlap, but it will not catch all cases since the 203191783Srmacklem * driver may adjust the msize paramater during probe, for 204191783Srmacklem * now we just check that the starting address does not 205191783Srmacklem * fall within any allocated region. 206191783Srmacklem * XXX could add a second check after the probe for overlap, 207191783Srmacklem * since at that time we would know the full range. 208191783Srmacklem * XXX KERNBASE is a hack, we should have vaddr in the table! 209191783Srmacklem */ 210191783Srmacklem if (checkbits & CC_MEMADDR && tmpdvp->id_maddr) { 211191783Srmacklem if ((KERNBASE + dvp->id_maddr >= tmpdvp->id_maddr) && 212191783Srmacklem (KERNBASE + dvp->id_maddr <= 213191783Srmacklem (tmpdvp->id_maddr + tmpdvp->id_msize - 1))) { 214191783Srmacklem conflict(dvp, tmpdvp, (int)dvp->id_maddr, 215191783Srmacklem whatnot, "maddr", "0x%x"); 216191783Srmacklem return 1; 217191783Srmacklem } 218191783Srmacklem } 219191783Srmacklem /* 220191783Srmacklem * Check for IRQ conflicts. 221191783Srmacklem */ 222191783Srmacklem if (checkbits & CC_IRQ && tmpdvp->id_irq) { 223191783Srmacklem if (tmpdvp->id_irq == dvp->id_irq) { 224191783Srmacklem conflict(dvp, tmpdvp, ffs(dvp->id_irq) - 1, 225191783Srmacklem whatnot, "irq", "%d"); 226191783Srmacklem return 1; 227191783Srmacklem } 228191783Srmacklem } 229191783Srmacklem /* 230191783Srmacklem * Check for DRQ conflicts. 231191783Srmacklem */ 232191783Srmacklem if (checkbits & CC_DRQ && tmpdvp->id_drq != -1) { 233191783Srmacklem if (tmpdvp->id_drq == dvp->id_drq) { 234191783Srmacklem conflict(dvp, tmpdvp, dvp->id_drq, whatnot, 235191783Srmacklem "drq", "%d"); 236191783Srmacklem return 1; 237191783Srmacklem } 238191783Srmacklem } 239191783Srmacklem } 240191783Srmacklem return 0; 241191783Srmacklem} 242191783Srmacklem 243191783Srmacklem/* 244223309Srmacklem * Search through all the isa_devtab_* tables looking for anything that 245191783Srmacklem * conflicts with the current device. 246191783Srmacklem */ 247191783Srmacklemstatic int 248191783Srmacklemhaveseen_isadev(dvp, checkbits) 249191783Srmacklem struct isa_device *dvp; 250191783Srmacklem u_int checkbits; 251191783Srmacklem{ 252223309Srmacklem struct isa_device *tmpdvp; 253191783Srmacklem int status = 0; 254191783Srmacklem 255191783Srmacklem for (tmpdvp = isa_devtab_tty; tmpdvp->id_driver; tmpdvp++) { 256191783Srmacklem status |= haveseen(dvp, tmpdvp, checkbits); 257191783Srmacklem if (status) 258191783Srmacklem return status; 259191783Srmacklem } 260191783Srmacklem for (tmpdvp = isa_devtab_bio; tmpdvp->id_driver; tmpdvp++) { 261191783Srmacklem status |= haveseen(dvp, tmpdvp, checkbits); 262191783Srmacklem if (status) 263191783Srmacklem return status; 264191783Srmacklem } 265191783Srmacklem for (tmpdvp = isa_devtab_net; tmpdvp->id_driver; tmpdvp++) { 266191783Srmacklem status |= haveseen(dvp, tmpdvp, checkbits); 267191783Srmacklem if (status) 268191783Srmacklem return status; 269191783Srmacklem } 270191783Srmacklem for (tmpdvp = isa_devtab_null; tmpdvp->id_driver; tmpdvp++) { 271191783Srmacklem status |= haveseen(dvp, tmpdvp, checkbits); 272191783Srmacklem if (status) 273191783Srmacklem return status; 274191783Srmacklem } 275191783Srmacklem return(status); 276191783Srmacklem} 277191783Srmacklem 278191783Srmacklem/* 279191783Srmacklem * Configure all ISA devices 280191783Srmacklem */ 281191783Srmacklemvoid 282191783Srmacklemisa_configure() { 283192613Srmacklem struct isa_device *dvp; 284191783Srmacklem 285191783Srmacklem dev_attach(&kdc_isa0); 286191783Srmacklem 287191783Srmacklem splhigh(); 288191783Srmacklem enable_intr(); 289191783Srmacklem INTREN(IRQ_SLAVE); 290191783Srmacklem printf("Probing for devices on the ISA bus:\n"); 291 /* First probe all the sensitive probes */ 292 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 293 if (dvp->id_driver->sensitive_hw) 294 config_isadev(dvp, &tty_imask); 295 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 296 if (dvp->id_driver->sensitive_hw) 297 config_isadev(dvp, &bio_imask); 298 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 299 if (dvp->id_driver->sensitive_hw) 300 config_isadev(dvp, &net_imask); 301 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 302 if (dvp->id_driver->sensitive_hw) 303 config_isadev(dvp, (u_int *)NULL); 304 305 /* Then all the bad ones */ 306 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 307 if (!dvp->id_driver->sensitive_hw) 308 config_isadev(dvp, &tty_imask); 309 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 310 if (!dvp->id_driver->sensitive_hw) 311 config_isadev(dvp, &bio_imask); 312 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 313 if (!dvp->id_driver->sensitive_hw) 314 config_isadev(dvp, &net_imask); 315 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 316 if (!dvp->id_driver->sensitive_hw) 317 config_isadev(dvp, (u_int *)NULL); 318 319 bio_imask |= SWI_CLOCK_MASK; 320 net_imask |= SWI_NET_MASK; 321 tty_imask |= SWI_TTY_MASK; 322 323/* 324 * XXX we should really add the tty device to net_imask when the line is 325 * switched to SLIPDISC, and then remove it when it is switched away from 326 * SLIPDISC. No need to block out ALL ttys during a splimp when only one 327 * of them is running slip. 328 * 329 * XXX actually, blocking all ttys during a splimp doesn't matter so much 330 * with sio because the serial interrupt layer doesn't use tty_imask. Only 331 * non-serial ttys suffer. It's more stupid that ALL 'net's are blocked 332 * during spltty. 333 */ 334#include "sl.h" 335#include "ppp.h" 336 337#if (NSL > 0) || (NPPP > 0) 338 net_imask |= tty_imask; 339 tty_imask = net_imask; 340#endif 341 /* bio_imask |= tty_imask ; can some tty devices use buffers? */ 342#ifdef DIAGNOSTIC 343 printf("bio_imask %x tty_imask %x net_imask %x\n", 344 bio_imask, tty_imask, net_imask); 345#endif 346 /* 347 * Finish initializing intr_mask[]. Note that the partly 348 * constructed masks aren't actually used since we're at splhigh. 349 * For fully dynamic initialization, register_intr() and 350 * unregister_intr() will have to adjust the masks for _all_ 351 * interrupts and for tty_imask, etc. 352 */ 353 for (dvp = isa_devtab_tty; dvp->id_driver; dvp++) 354 register_imask(dvp, tty_imask); 355 for (dvp = isa_devtab_bio; dvp->id_driver; dvp++) 356 register_imask(dvp, bio_imask); 357 for (dvp = isa_devtab_net; dvp->id_driver; dvp++) 358 register_imask(dvp, net_imask); 359 for (dvp = isa_devtab_null; dvp->id_driver; dvp++) 360 register_imask(dvp, SWI_CLOCK_MASK); 361 spl0(); 362} 363 364/* 365 * Configure an ISA device. 366 */ 367 368 369static void config_isadev_c(); 370 371static void 372config_isadev(isdp, mp) 373 struct isa_device *isdp; 374 u_int *mp; 375{ 376 config_isadev_c(isdp, mp, 0); 377} 378 379void 380reconfig_isadev(isdp, mp) 381 struct isa_device *isdp; 382 u_int *mp; 383{ 384 config_isadev_c(isdp, mp, 1); 385} 386 387static void 388config_isadev_c(isdp, mp, reconfig) 389 struct isa_device *isdp; 390 u_int *mp; 391 int reconfig; 392{ 393 u_int checkbits; 394 int id_alive; 395 int last_alive; 396 struct isa_driver *dp = isdp->id_driver; 397 398 checkbits = 0; 399#ifndef ALLOW_CONFLICT_DRQ 400 checkbits |= CC_DRQ; 401#endif 402#ifndef ALLOW_CONFLICT_IOADDR 403 checkbits |= CC_IOADDR; 404#endif 405#ifndef ALLOW_CONFLICT_MEMADDR 406 checkbits |= CC_MEMADDR; 407#endif 408 if (!isdp->id_enabled) { 409 printf("%s%d: disabled, not probed.\n", 410 dp->name, isdp->id_unit); 411 return; 412 } 413 if (!reconfig && haveseen_isadev(isdp, checkbits)) 414 return; 415 if (!reconfig && isdp->id_maddr) { 416 isdp->id_maddr -= 0xa0000; /* XXX should be a define */ 417 isdp->id_maddr += atdevbase; 418 } 419 if (reconfig) { 420 last_alive = isdp->id_alive; 421 isdp->id_reconfig = 1; 422 } 423 else { 424 last_alive = 0; 425 isdp->id_reconfig = 0; 426 } 427 id_alive = (*dp->probe)(isdp); 428 if (id_alive) { 429 /* 430 * Only print the I/O address range if id_alive != -1 431 * Right now this is a temporary fix just for the new 432 * NPX code so that if it finds a 486 that can use trap 433 * 16 it will not report I/O addresses. 434 * Rod Grimes 04/26/94 435 */ 436 if (!isdp->id_reconfig) { 437 printf("%s%d", dp->name, isdp->id_unit); 438 if (id_alive != -1) { 439 printf(" at 0x%x", isdp->id_iobase); 440 if ((isdp->id_iobase + id_alive - 1) != 441 isdp->id_iobase) { 442 printf("-0x%x", 443 isdp->id_iobase + id_alive - 1); 444 } 445 } 446 if (isdp->id_irq) 447 printf(" irq %d", ffs(isdp->id_irq) - 1); 448 if (isdp->id_drq != -1) 449 printf(" drq %d", isdp->id_drq); 450 if (isdp->id_maddr) 451 printf(" maddr 0x%lx", kvtop(isdp->id_maddr)); 452 if (isdp->id_msize) 453 printf(" msize %d", isdp->id_msize); 454 if (isdp->id_flags) 455 printf(" flags 0x%x", isdp->id_flags); 456 if (isdp->id_iobase) { 457 if (!(isdp->id_iobase & 0xf300)) { 458 printf(" on motherboard"); 459 } else if (isdp->id_iobase >= 0x1000 && 460 !(isdp->id_iobase & 0x300)) { 461 printf (" on eisa slot %d", 462 isdp->id_iobase >> 12); 463 } else { 464 printf (" on isa"); 465 } 466 } 467 printf("\n"); 468 /* 469 * Check for conflicts again. The driver may have 470 * changed *dvp. We should weaken the early check 471 * since the driver may have been able to change 472 * *dvp to avoid conflicts if given a chance. We 473 * already skip the early check for IRQs and force 474 * a check for IRQs in the next group of checks. 475 */ 476#ifndef ALLOW_CONFLICT_IRQ 477 checkbits |= CC_IRQ; 478#endif 479 if (haveseen_isadev(isdp, checkbits)) 480 return; 481 isdp->id_alive = id_alive; 482 } 483 (*dp->attach)(isdp); 484 if (isdp->id_irq) { 485 if (mp) 486 INTRMASK(*mp, isdp->id_irq); 487 register_intr(ffs(isdp->id_irq) - 1, isdp->id_id, 488 isdp->id_ri_flags, isdp->id_intr, 489 mp, isdp->id_unit); 490 INTREN(isdp->id_irq); 491 } 492 } else { 493 if (isdp->id_reconfig) { 494 (*dp->attach)(isdp); /* reconfiguration attach */ 495 } 496 if (!last_alive) { 497 if (!isdp->id_reconfig) { 498 printf("%s%d not found", dp->name, isdp->id_unit); 499 if (isdp->id_iobase) { 500 printf(" at 0x%x", isdp->id_iobase); 501 } 502 printf("\n"); 503 } 504 } 505 else { 506 /* This code has not been tested.... */ 507 if (isdp->id_irq) { 508 INTRDIS(isdp->id_irq); 509 unregister_intr(ffs(isdp->id_irq) - 1, 510 isdp->id_intr); 511 if (mp) 512 INTRUNMASK(*mp, isdp->id_irq); 513 } 514 } 515 } 516} 517 518/* 519 * Provide ISA-specific device information to user programs using the 520 * hw.devconf interface. 521 */ 522int 523isa_externalize(struct isa_device *id, void *userp, size_t *maxlen) 524{ 525 if(*maxlen < sizeof *id) { 526 return ENOMEM; 527 } 528 529 *maxlen -= sizeof *id; 530 return copyout(id, userp, sizeof *id); 531} 532 533/* 534 * Do the same thing for EISA information. EISA information is currently 535 * the same as ISA information plus a slot number, but could be extended in 536 * the future. 537 */ 538int 539eisa_externalize(struct isa_device *id, int slot, void *userp, size_t *maxlen) 540{ 541 int rv; 542 543 if(*maxlen < (sizeof *id) + (sizeof slot)) { 544 return ENOMEM; 545 } 546 *maxlen -= (sizeof *id) + (sizeof slot); 547 548 rv = copyout(id, userp, sizeof *id); 549 if(rv) return rv; 550 551 return copyout(&slot, (char *)userp + sizeof *id, sizeof slot); 552} 553 554/* 555 * This is used to forcibly reconfigure an ISA device. It currently just 556 * returns an error 'cos you can't do that yet. It is here to demonstrate 557 * what the `internalize' routine is supposed to do. 558 */ 559int 560isa_internalize(struct isa_device *id, void **userpp, size_t *len) 561{ 562 struct isa_device myid; 563 char *userp = *userpp; 564 int rv; 565 566 if(*len < sizeof *id) { 567 return EINVAL; 568 } 569 570 rv = copyin(userp, &myid, sizeof myid); 571 if(rv) return rv; 572 *userpp = userp + sizeof myid; 573 *len -= sizeof myid; 574 575 rv = EOPNOTSUPP; 576 /* code would go here to validate the configuration request */ 577 /* code would go here to actually perform the reconfiguration */ 578 return rv; 579} 580 581int 582isa_generic_externalize(struct proc *p, struct kern_devconf *kdc, 583 void *userp, size_t l) 584{ 585 return isa_externalize(kdc->kdc_isa, userp, &l); 586} 587 588int 589eisa_generic_externalize(struct proc *p, struct kern_devconf *kdc, 590 void *userp, size_t l) 591{ 592 return eisa_externalize(kdc->kdc_isa, -1, userp, &l); 593} 594 595/* 596 * Fill in default interrupt table (in case of spuruious interrupt 597 * during configuration of kernel, setup interrupt control unit 598 */ 599void 600isa_defaultirq() 601{ 602 int i; 603 604 /* icu vectors */ 605 for (i = 0; i < ICU_LEN; i++) 606 unregister_intr(i, (inthand2_t *)NULL); 607 608 /* initialize 8259's */ 609 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ 610 outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ 611 outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ 612#ifdef AUTO_EOI_1 613 outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ 614#else 615 outb(IO_ICU1+1, 1); /* 8086 mode */ 616#endif 617 outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ 618 outb(IO_ICU1, 0x0a); /* default to IRR on read */ 619 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ 620 621 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ 622 outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ 623 outb(IO_ICU2+1,2); /* my slave id is 2 */ 624#ifdef AUTO_EOI_2 625 outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ 626#else 627 outb(IO_ICU2+1,1); /* 8086 mode */ 628#endif 629 outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ 630 outb(IO_ICU2, 0x0a); /* default to IRR on read */ 631} 632 633/* region of physical memory known to be contiguous */ 634vm_offset_t isaphysmem; 635static caddr_t dma_bounce[8]; /* XXX */ 636static char bounced[8]; /* XXX */ 637#define MAXDMASZ 512 /* XXX */ 638 639/* high byte of address is stored in this port for i-th dma channel */ 640static short dmapageport[8] = 641 { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 642 643/* 644 * isa_dmacascade(): program 8237 DMA controller channel to accept 645 * external dma control by a board. 646 */ 647void isa_dmacascade(unsigned chan) 648{ 649 if (chan > 7) 650 panic("isa_dmacascade: impossible request"); 651 652 /* set dma channel mode, and set dma channel mode */ 653 if ((chan & 4) == 0) { 654 outb(DMA1_MODE, DMA37MD_CASCADE | chan); 655 outb(DMA1_SMSK, chan); 656 } else { 657 outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 658 outb(DMA2_SMSK, chan & 3); 659 } 660} 661 662static int 663isa_dmarangecheck(caddr_t va, unsigned length, unsigned chan); 664 665/* 666 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 667 * problems by using a bounce buffer. 668 */ 669void isa_dmastart(int flags, caddr_t addr, unsigned nbytes, unsigned chan) 670{ vm_offset_t phys; 671 int waport; 672 caddr_t newaddr; 673 674 if ( chan > 7 675 || (chan < 4 && nbytes > (1<<16)) 676 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 677 panic("isa_dmastart: impossible request"); 678 679 if (isa_dmarangecheck(addr, nbytes, chan)) { 680 if (dma_bounce[chan] == 0) 681 dma_bounce[chan] = 682 /*(caddr_t)malloc(MAXDMASZ, M_TEMP, M_WAITOK);*/ 683 (caddr_t) isaphysmem + NBPG*chan; 684 bounced[chan] = 1; 685 newaddr = dma_bounce[chan]; 686 *(int *) newaddr = 0; /* XXX */ 687 688 /* copy bounce buffer on write */ 689 if (!(flags & B_READ)) 690 bcopy(addr, newaddr, nbytes); 691 addr = newaddr; 692 } 693 694 /* translate to physical */ 695 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); 696 697 if ((chan & 4) == 0) { 698 /* 699 * Program one of DMA channels 0..3. These are 700 * byte mode channels. 701 */ 702 /* set dma channel mode, and reset address ff */ 703 704 /* If B_RAW flag is set, then use autoinitialise mode */ 705 if (flags & B_RAW) { 706 if (flags & B_READ) 707 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 708 else 709 outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 710 } 711 else 712 if (flags & B_READ) 713 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 714 else 715 outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 716 outb(DMA1_FFC, 0); 717 718 /* send start address */ 719 waport = DMA1_CHN(chan); 720 outb(waport, phys); 721 outb(waport, phys>>8); 722 outb(dmapageport[chan], phys>>16); 723 724 /* send count */ 725 outb(waport + 1, --nbytes); 726 outb(waport + 1, nbytes>>8); 727 728 /* unmask channel */ 729 outb(DMA1_SMSK, chan); 730 } else { 731 /* 732 * Program one of DMA channels 4..7. These are 733 * word mode channels. 734 */ 735 /* set dma channel mode, and reset address ff */ 736 737 /* If B_RAW flag is set, then use autoinitialise mode */ 738 if (flags & B_RAW) { 739 if (flags & B_READ) 740 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 741 else 742 outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 743 } 744 else 745 if (flags & B_READ) 746 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 747 else 748 outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 749 outb(DMA2_FFC, 0); 750 751 /* send start address */ 752 waport = DMA2_CHN(chan - 4); 753 outb(waport, phys>>1); 754 outb(waport, phys>>9); 755 outb(dmapageport[chan], phys>>16); 756 757 /* send count */ 758 nbytes >>= 1; 759 outb(waport + 2, --nbytes); 760 outb(waport + 2, nbytes>>8); 761 762 /* unmask channel */ 763 outb(DMA2_SMSK, chan & 3); 764 } 765} 766 767void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 768{ 769 770 /* copy bounce buffer on read */ 771 /*if ((flags & (B_PHYS|B_READ)) == (B_PHYS|B_READ))*/ 772 if (bounced[chan]) { 773 bcopy(dma_bounce[chan], addr, nbytes); 774 bounced[chan] = 0; 775 } 776} 777 778/* 779 * Check for problems with the address range of a DMA transfer 780 * (non-contiguous physical pages, outside of bus address space, 781 * crossing DMA page boundaries). 782 * Return true if special handling needed. 783 */ 784 785static int 786isa_dmarangecheck(caddr_t va, unsigned length, unsigned chan) { 787 vm_offset_t phys, priorpage = 0, endva; 788 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 789 790 endva = (vm_offset_t)round_page(va + length); 791 for (; va < (caddr_t) endva ; va += NBPG) { 792 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); 793#define ISARAM_END RAM_END 794 if (phys == 0) 795 panic("isa_dmacheck: no physical page present"); 796 if (phys >= ISARAM_END) 797 return (1); 798 if (priorpage) { 799 if (priorpage + NBPG != phys) 800 return (1); 801 /* check if crossing a DMA page boundary */ 802 if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 803 return (1); 804 } 805 priorpage = phys; 806 } 807 return (0); 808} 809 810/* head of queue waiting for physmem to become available */ 811struct buf isa_physmemq; 812 813/* blocked waiting for resource to become free for exclusive use */ 814static isaphysmemflag; 815/* if waited for and call requested when free (B_CALL) */ 816static void (*isaphysmemunblock)(); /* needs to be a list */ 817 818/* 819 * Allocate contiguous physical memory for transfer, returning 820 * a *virtual* address to region. May block waiting for resource. 821 * (assumed to be called at splbio()) 822 */ 823caddr_t 824isa_allocphysmem(caddr_t va, unsigned length, void (*func)()) { 825 826 isaphysmemunblock = func; 827 while (isaphysmemflag & B_BUSY) { 828 isaphysmemflag |= B_WANTED; 829 tsleep((caddr_t)&isaphysmemflag, PRIBIO, "isaphys", 0); 830 } 831 isaphysmemflag |= B_BUSY; 832 833 return((caddr_t)isaphysmem); 834} 835 836/* 837 * Free contiguous physical memory used for transfer. 838 * (assumed to be called at splbio()) 839 */ 840void 841isa_freephysmem(caddr_t va, unsigned length) { 842 843 isaphysmemflag &= ~B_BUSY; 844 if (isaphysmemflag & B_WANTED) { 845 isaphysmemflag &= B_WANTED; 846 wakeup((caddr_t)&isaphysmemflag); 847 if (isaphysmemunblock) 848 (*isaphysmemunblock)(); 849 } 850} 851 852#define NMI_PARITY (1 << 7) 853#define NMI_IOCHAN (1 << 6) 854#define ENMI_WATCHDOG (1 << 7) 855#define ENMI_BUSTIMER (1 << 6) 856#define ENMI_IOSTATUS (1 << 5) 857 858/* 859 * Handle a NMI, possibly a machine check. 860 * return true to panic system, false to ignore. 861 */ 862int 863isa_nmi(cd) 864 int cd; 865{ 866 int isa_port = inb(0x61); 867 int eisa_port = inb(0x461); 868 if(isa_port & NMI_PARITY) { 869 panic("RAM parity error, likely hardware failure."); 870 } else if(isa_port & NMI_IOCHAN) { 871 panic("I/O channel check, likely hardware failure."); 872 } else if(eisa_port & ENMI_WATCHDOG) { 873 panic("EISA watchdog timer expired, likely hardware failure."); 874 } else if(eisa_port & ENMI_BUSTIMER) { 875 panic("EISA bus timeout, likely hardware failure."); 876 } else if(eisa_port & ENMI_IOSTATUS) { 877 panic("EISA I/O port status error."); 878 } else { 879 printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); 880 return(0); 881 } 882} 883 884/* 885 * Caught a stray interrupt, notify 886 */ 887static void 888isa_strayintr(d) 889 int d; 890{ 891 892 /* DON'T BOTHER FOR NOW! */ 893 /* for some reason, we get bursts of intr #7, even if not enabled! */ 894 /* 895 * Well the reason you got bursts of intr #7 is because someone 896 * raised an interrupt line and dropped it before the 8259 could 897 * prioritize it. This is documented in the intel data book. This 898 * means you have BAD hardware! I have changed this so that only 899 * the first 5 get logged, then it quits logging them, and puts 900 * out a special message. rgrimes 3/25/1993 901 */ 902 /* 903 * XXX TODO print a different message for #7 if it is for a 904 * glitch. Glitches can be distinguished from real #7's by 905 * testing that the in-service bit is _not_ set. The test 906 * must be done before sending an EOI so it can't be done if 907 * we are using AUTO_EOI_1. 908 */ 909 if (intrcnt[NR_DEVICES + d] <= 5) 910 log(LOG_ERR, "stray irq %d\n", d); 911 if (intrcnt[NR_DEVICES + d] == 5) 912 log(LOG_CRIT, 913 "too many stray irq %d's; not logging any more\n", d); 914} 915 916/* 917 * find an ISA device in a given isa_devtab_* table, given 918 * the table to search, the expected id_driver entry, and the unit number. 919 * 920 * this function is defined in isa_device.h, and this location is debatable; 921 * i put it there because it's useless w/o, and directly operates on 922 * the other stuff in that file. 923 * 924 */ 925 926struct isa_device *find_isadev(table, driverp, unit) 927 struct isa_device *table; 928 struct isa_driver *driverp; 929 int unit; 930{ 931 if (driverp == NULL) /* sanity check */ 932 return NULL; 933 934 while ((table->id_driver != driverp) || (table->id_unit != unit)) { 935 if (table->id_driver == 0) 936 return NULL; 937 938 table++; 939 } 940 941 return table; 942} 943 944/* 945 * Return nonzero if a (masked) irq is pending for a given device. 946 */ 947int 948isa_irq_pending(dvp) 949 struct isa_device *dvp; 950{ 951 unsigned id_irq; 952 953 id_irq = dvp->id_irq; 954 if (id_irq & 0xff) 955 return (inb(IO_ICU1) & id_irq); 956 return (inb(IO_ICU2) & (id_irq >> 8)); 957} 958 959int 960update_intr_masks(void) 961{ 962 int intr, n=0; 963 u_int mask,*maskptr; 964 for (intr=0; intr < ICU_LEN; intr ++) { 965 if (intr==2) continue; 966 maskptr = intr_mptr[intr]; 967 if (!maskptr) continue; 968 mask = *maskptr; 969 if (mask != intr_mask[intr]) { 970#if 0 971 printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", 972 intr, intr_mask[intr], mask, maskptr); 973#endif 974 intr_mask[intr]=mask; 975 n++; 976 } 977 978 } 979 return (n); 980} 981 982int 983register_intr(intr, device_id, flags, handler, maskptr, unit) 984 int intr; 985 int device_id; 986 u_int flags; 987 inthand2_t *handler; 988 u_int *maskptr; 989 int unit; 990{ 991 char *cp; 992 u_long ef; 993 int id; 994 u_int mask = (maskptr ? *maskptr : 0); 995 996 if ((u_int)intr >= ICU_LEN || intr == 2 997 || (u_int)device_id >= NR_DEVICES) 998 return (EINVAL); 999 if (intr_handler[intr] != isa_strayintr) 1000 return (EBUSY); 1001 ef = read_eflags(); 1002 disable_intr(); 1003 intr_countp[intr] = &intrcnt[device_id]; 1004 intr_handler[intr] = handler; 1005 intr_mptr[intr] = maskptr; 1006 intr_mask[intr] = mask | (1 << intr); 1007 intr_unit[intr] = unit; 1008 setidt(ICU_OFFSET + intr, 1009 flags & RI_FAST ? fastintr[intr] : slowintr[intr], 1010 SDT_SYS386IGT, SEL_KPL); 1011 write_eflags(ef); 1012 for (cp = intrnames, id = 0; id <= device_id; id++) 1013 while (*cp++ != '\0') 1014 ; 1015 if (cp > eintrnames) 1016 return (0); 1017 if (intr < 10) { 1018 cp[-3] = intr + '0'; 1019 cp[-2] = ' '; 1020 } else { 1021 cp[-3] = '1'; 1022 cp[-2] = intr - 10 + '0'; 1023 } 1024 return (0); 1025} 1026 1027static void 1028register_imask(dvp, mask) 1029 struct isa_device *dvp; 1030 u_int mask; 1031{ 1032 if (dvp->id_alive && dvp->id_irq) { 1033 int intr; 1034 1035 intr = ffs(dvp->id_irq) - 1; 1036 intr_mask[intr] = mask | (1 <<intr); 1037 } 1038 (void) update_intr_masks(); 1039} 1040 1041int 1042unregister_intr(intr, handler) 1043 int intr; 1044 inthand2_t *handler; 1045{ 1046 u_long ef; 1047 1048 if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) 1049 return (EINVAL); 1050 ef = read_eflags(); 1051 disable_intr(); 1052 intr_countp[intr] = &intrcnt[NR_DEVICES + intr]; 1053 intr_handler[intr] = isa_strayintr; 1054 intr_mptr[intr] = NULL; 1055 intr_mask[intr] = HWI_MASK | SWI_MASK; 1056 intr_unit[intr] = intr; 1057 setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL); 1058 write_eflags(ef); 1059 return (0); 1060} 1061