int.c revision 1.22
1 /* $NetBSD: int.c,v 1.22 2011/02/20 07:59:50 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Stephen M. Rumble 5 * Copyright (c) 2004 Christopher SEKIYA 6 * All rights reserved. 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. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * INT1/INT2/INT3 interrupt controllers (IP6, IP10, IP12, IP20, IP22, IP24...) 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: int.c,v 1.22 2011/02/20 07:59:50 matt Exp $"); 37 38 #define __INTR_PRIVATE 39 #include "opt_cputype.h" 40 41 #include <sys/param.h> 42 #include <sys/proc.h> 43 #include <sys/systm.h> 44 #include <sys/timetc.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/malloc.h> 48 49 #include <dev/ic/i8253reg.h> 50 #include <machine/sysconf.h> 51 #include <machine/machtype.h> 52 #include <machine/bus.h> 53 #include <mips/locore.h> 54 55 #include <mips/cache.h> 56 57 #include <sgimips/dev/int1reg.h> 58 #include <sgimips/dev/int2reg.h> 59 #include <sgimips/dev/int2var.h> 60 61 static bus_space_handle_t ioh; 62 static bus_space_tag_t iot; 63 64 struct int_softc { 65 struct device sc_dev; 66 }; 67 68 69 static int int_match(struct device *, struct cfdata *, void *); 70 static void int_attach(struct device *, struct device *, void *); 71 static void *int1_intr_establish(int, int, int (*)(void *), void *); 72 static void *int2_intr_establish(int, int, int (*)(void *), void *); 73 static void int1_local_intr(vaddr_t, uint32_t, uint32_t); 74 static void int2_local0_intr(vaddr_t, uint32_t, uint32_t); 75 static void int2_local1_intr(vaddr_t, uint32_t, uint32_t); 76 static int int2_mappable_intr(void *); 77 static void int_8254_cal(void); 78 static u_int int_8254_get_timecount(struct timecounter *); 79 static void int_8254_intr0(vaddr_t, uint32_t, uint32_t); 80 static void int_8254_intr1(vaddr_t, uint32_t, uint32_t); 81 82 #ifdef MIPS3 83 static u_long int2_cpu_freq(struct device *); 84 static u_long int2_cal_timer(void); 85 #endif 86 87 static struct timecounter int_8254_timecounter = { 88 int_8254_get_timecount, /* get_timecount */ 89 0, /* no poll_pps */ 90 ~0u, /* counter_mask */ 91 0, /* frequency; set in int_8254_cal */ 92 "int i8254", /* name */ 93 100, /* quality */ 94 NULL, /* prev */ 95 NULL, /* next */ 96 }; 97 98 static u_long int_8254_tc_count; 99 100 CFATTACH_DECL(int, sizeof(struct int_softc), 101 int_match, int_attach, NULL, NULL); 102 103 static int 104 int_match(struct device *parent, struct cfdata *match, void *aux) 105 { 106 107 switch (mach_type) { 108 case MACH_SGI_IP6 | MACH_SGI_IP10: 109 case MACH_SGI_IP12: 110 case MACH_SGI_IP20: 111 case MACH_SGI_IP22: 112 return 1; 113 } 114 115 return 0; 116 } 117 118 static void 119 int_attach(struct device *parent, struct device *self, void *aux) 120 { 121 uint32_t address; 122 123 switch (mach_type) { 124 case MACH_SGI_IP6 | MACH_SGI_IP10: 125 address = INT1_IP6_IP10; 126 break; 127 128 case MACH_SGI_IP12: 129 address = INT2_IP12; 130 break; 131 132 case MACH_SGI_IP20: 133 address = INT2_IP20; 134 break; 135 136 case MACH_SGI_IP22: 137 if (mach_subtype == MACH_SGI_IP22_FULLHOUSE) 138 address = INT2_IP22; 139 else 140 address = INT2_IP24; 141 break; 142 143 default: 144 panic("\nint0: passed match, but failed attach?"); 145 } 146 147 printf(" addr 0x%x\n", address); 148 149 bus_space_map(iot, address, 0, 0, &ioh); 150 iot = SGIMIPS_BUS_SPACE_NORMAL; 151 152 switch (mach_type) { 153 case MACH_SGI_IP6 | MACH_SGI_IP10: 154 /* Clean out interrupt masks */ 155 bus_space_write_1(iot, ioh, INT1_LOCAL_MASK, 0); 156 157 /* Turn off timers and clear interrupts */ 158 bus_space_write_1(iot, ioh, INT1_TIMER_CONTROL, 159 (TIMER_SEL0 | TIMER_16BIT | TIMER_SWSTROBE)); 160 bus_space_write_1(iot, ioh, INT1_TIMER_CONTROL, 161 (TIMER_SEL1 | TIMER_16BIT | TIMER_SWSTROBE)); 162 bus_space_write_1(iot, ioh, INT1_TIMER_CONTROL, 163 (TIMER_SEL2 | TIMER_16BIT | TIMER_SWSTROBE)); 164 wbflush(); 165 delay(4); 166 bus_space_read_1(iot, ioh, INT1_TIMER_0_ACK); 167 bus_space_read_1(iot, ioh, INT1_TIMER_1_ACK); 168 169 platform.intr_establish = int1_intr_establish; 170 platform.intr1 = int1_local_intr; 171 platform.intr2 = int_8254_intr0; 172 platform.intr4 = int_8254_intr1; 173 int_8254_cal(); 174 break; 175 176 case MACH_SGI_IP12: 177 case MACH_SGI_IP20: 178 case MACH_SGI_IP22: 179 /* Clean out interrupt masks */ 180 bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, 0); 181 bus_space_write_1(iot, ioh, INT2_LOCAL1_MASK, 0); 182 bus_space_write_1(iot, ioh, INT2_MAP_MASK0, 0); 183 bus_space_write_1(iot, ioh, INT2_MAP_MASK1, 0); 184 185 /* Reset timer interrupts */ 186 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 187 (TIMER_SEL0 | TIMER_16BIT | TIMER_SWSTROBE)); 188 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 189 (TIMER_SEL1 | TIMER_16BIT | TIMER_SWSTROBE)); 190 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 191 (TIMER_SEL2 | TIMER_16BIT | TIMER_SWSTROBE)); 192 wbflush(); 193 delay(4); 194 bus_space_write_1(iot, ioh, INT2_TIMER_CLEAR, 0x03); 195 196 if (mach_type == MACH_SGI_IP12) { 197 platform.intr_establish = int2_intr_establish; 198 platform.intr1 = int2_local0_intr; 199 platform.intr2 = int2_local1_intr; 200 platform.intr3 = int_8254_intr0; 201 platform.intr4 = int_8254_intr1; 202 int_8254_cal(); 203 } else { 204 platform.intr_establish = int2_intr_establish; 205 platform.intr0 = int2_local0_intr; 206 platform.intr1 = int2_local1_intr; 207 #ifdef MIPS3 208 curcpu()->ci_cpu_freq = int2_cpu_freq(self); 209 #endif 210 } 211 break; 212 213 default: 214 panic("int0: unsupported machine type %i\n", mach_type); 215 } 216 217 curcpu()->ci_cycles_per_hz = curcpu()->ci_cpu_freq / (2 * hz); 218 curcpu()->ci_divisor_delay = curcpu()->ci_cpu_freq / (2 * 1000000); 219 220 if (mach_type == MACH_SGI_IP22) { 221 /* Wire interrupts 7, 11 to mappable interrupt 0,1 handlers */ 222 intrtab[7].ih_fun = int2_mappable_intr; 223 intrtab[7].ih_arg = (void*) 0; 224 225 intrtab[11].ih_fun = int2_mappable_intr; 226 intrtab[11].ih_arg = (void*) 1; 227 } 228 } 229 230 int 231 int2_mappable_intr(void *arg) 232 { 233 int i; 234 int ret; 235 int intnum; 236 uint32_t mstat; 237 uint32_t mmask; 238 int which = (intptr_t)arg; 239 struct sgimips_intrhand *ih; 240 241 ret = 0; 242 mstat = bus_space_read_1(iot, ioh, INT2_MAP_STATUS); 243 mmask = bus_space_read_1(iot, ioh, INT2_MAP_MASK0 + (which << 2)); 244 245 mstat &= mmask; 246 247 for (i = 0; i < 8; i++) { 248 intnum = i + 16 + (which << 3); 249 if (mstat & (1 << i)) { 250 for (ih = &intrtab[intnum]; ih != NULL; 251 ih = ih->ih_next) { 252 if (ih->ih_fun != NULL) 253 ret |= (ih->ih_fun)(ih->ih_arg); 254 else 255 printf("int0: unexpected mapped " 256 "interrupt %d\n", intnum); 257 } 258 } 259 } 260 261 return ret; 262 } 263 264 static void 265 int1_local_intr(vaddr_t pc, uint32_t status, uint32_t ipend) 266 { 267 int i; 268 uint16_t stat; 269 uint8_t mask; 270 struct sgimips_intrhand *ih; 271 272 stat = bus_space_read_2(iot, ioh, INT1_LOCAL_STATUS); 273 mask = bus_space_read_1(iot, ioh, INT1_LOCAL_MASK); 274 275 /* for STATUS, a 0 bit means interrupt is pending */ 276 stat = ~stat & mask; 277 278 for (i = 0; stat != 0; i++, stat >>= 1) { 279 if (stat & 1) { 280 for (ih = &intrtab[i]; ih != NULL; ih = ih->ih_next) { 281 if (ih->ih_fun != NULL) 282 (ih->ih_fun)(ih->ih_arg); 283 else 284 printf("int0: unexpected local " 285 "interrupt %d\n", i); 286 } 287 } 288 } 289 } 290 291 void 292 int2_local0_intr(vaddr_t pc, uint32_t status, uint32_t ipending) 293 { 294 int i; 295 uint32_t l0stat; 296 uint32_t l0mask; 297 struct sgimips_intrhand *ih; 298 299 l0stat = bus_space_read_1(iot, ioh, INT2_LOCAL0_STATUS); 300 l0mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK); 301 302 l0stat &= l0mask; 303 304 for (i = 0; i < 8; i++) { 305 if (l0stat & (1 << i)) { 306 for (ih = &intrtab[i]; ih != NULL; ih = ih->ih_next) { 307 if (ih->ih_fun != NULL) 308 (ih->ih_fun)(ih->ih_arg); 309 else 310 printf("int0: unexpected local0 " 311 "interrupt %d\n", i); 312 } 313 } 314 } 315 } 316 317 void 318 int2_local1_intr(vaddr_t pc, uint32_t status, uint32_t ipending) 319 { 320 int i; 321 uint32_t l1stat; 322 uint32_t l1mask; 323 struct sgimips_intrhand *ih; 324 325 l1stat = bus_space_read_1(iot, ioh, INT2_LOCAL1_STATUS); 326 l1mask = bus_space_read_1(iot, ioh, INT2_LOCAL1_MASK); 327 328 l1stat &= l1mask; 329 330 for (i = 0; i < 8; i++) { 331 if (l1stat & (1 << i)) { 332 for (ih = &intrtab[8+i]; ih != NULL; ih = ih->ih_next) { 333 if (ih->ih_fun != NULL) 334 (ih->ih_fun)(ih->ih_arg); 335 else 336 printf("int0: unexpected local1 " 337 " interrupt %x\n", 8 + i); 338 } 339 } 340 } 341 } 342 343 void * 344 int1_intr_establish(int level, int ipl, int (*handler) (void *), void *arg) 345 { 346 uint8_t mask; 347 348 if (level < 0 || level >= NINTR) 349 panic("invalid interrupt level"); 350 351 if (intrtab[level].ih_fun == NULL) { 352 intrtab[level].ih_fun = handler; 353 intrtab[level].ih_arg = arg; 354 intrtab[level].ih_next = NULL; 355 } else { 356 struct sgimips_intrhand *n, *ih; 357 358 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 359 if (ih == NULL) { 360 printf("int0: can't allocate handler\n"); 361 return (void *)NULL; 362 } 363 364 ih->ih_fun = handler; 365 ih->ih_arg = arg; 366 ih->ih_next = NULL; 367 368 for (n = &intrtab[level]; n->ih_next != NULL; n = n->ih_next) 369 ; 370 371 n->ih_next = ih; 372 373 return NULL; /* vector already set */ 374 } 375 376 if (level < 8) { 377 mask = bus_space_read_1(iot, ioh, INT1_LOCAL_MASK); 378 mask |= (1 << level); 379 bus_space_write_1(iot, ioh, INT1_LOCAL_MASK, mask); 380 } else { 381 printf("int0: level >= 16 (%d)\n", level); 382 } 383 384 return NULL; 385 } 386 387 void * 388 int2_intr_establish(int level, int ipl, int (*handler) (void *), void *arg) 389 { 390 uint32_t mask; 391 392 if (level < 0 || level >= NINTR) 393 panic("invalid interrupt level"); 394 395 if (intrtab[level].ih_fun == NULL) { 396 intrtab[level].ih_fun = handler; 397 intrtab[level].ih_arg = arg; 398 intrtab[level].ih_next = NULL; 399 } else { 400 struct sgimips_intrhand *n, *ih; 401 402 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 403 if (ih == NULL) { 404 printf("int0: can't allocate handler\n"); 405 return NULL; 406 } 407 408 ih->ih_fun = handler; 409 ih->ih_arg = arg; 410 ih->ih_next = NULL; 411 412 for (n = &intrtab[level]; n->ih_next != NULL; n = n->ih_next) 413 ; 414 415 n->ih_next = ih; 416 417 return NULL; /* vector already set */ 418 } 419 420 if (level < 8) { 421 mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK); 422 mask |= (1 << level); 423 bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, mask); 424 } else if (level < 16) { 425 mask = bus_space_read_1(iot, ioh, INT2_LOCAL1_MASK); 426 mask |= (1 << (level - 8)); 427 bus_space_write_1(iot, ioh, INT2_LOCAL1_MASK, mask); 428 } else if (level < 24) { 429 /* Map0 interrupt maps to l0 bit 7, so turn that on too */ 430 mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK); 431 mask |= (1 << 7); 432 bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, mask); 433 434 mask = bus_space_read_1(iot, ioh, INT2_MAP_MASK0); 435 mask |= (1 << (level - 16)); 436 bus_space_write_1(iot, ioh, INT2_MAP_MASK0, mask); 437 } else { 438 /* Map1 interrupt maps to l1 bit 3, so turn that on too */ 439 mask = bus_space_read_1(iot, ioh, INT2_LOCAL1_MASK); 440 mask |= (1 << 3); 441 bus_space_write_1(iot, ioh, INT2_LOCAL1_MASK, mask); 442 443 mask = bus_space_read_1(iot, ioh, INT2_MAP_MASK1); 444 mask |= (1 << (level - 24)); 445 bus_space_write_1(iot, ioh, INT2_MAP_MASK1, mask); 446 } 447 448 return NULL; 449 } 450 451 #ifdef MIPS3 452 static u_long 453 int2_cpu_freq(struct device *self) 454 { 455 int i; 456 unsigned long cps; 457 unsigned long ctrdiff[3]; 458 459 /* calibrate timer */ 460 int2_cal_timer(); 461 462 cps = 0; 463 for (i = 0; 464 i < sizeof(ctrdiff) / sizeof(ctrdiff[0]); i++) { 465 do { 466 ctrdiff[i] = int2_cal_timer(); 467 } while (ctrdiff[i] == 0); 468 469 cps += ctrdiff[i]; 470 } 471 472 cps = cps / (sizeof(ctrdiff) / sizeof(ctrdiff[0])); 473 474 printf("%s: bus %luMHz, CPU %luMHz\n", 475 self->dv_xname, cps / 10000, cps / 5000); 476 477 /* R4k/R4400/R4600/R5k count at half CPU frequency */ 478 return (2 * cps * hz); 479 } 480 481 static u_long 482 int2_cal_timer(void) 483 { 484 int s; 485 int roundtime; 486 int sampletime; 487 int startmsb, lsb, msb; 488 unsigned long startctr, endctr; 489 490 /* 491 * NOTE: HZ must be greater than 15 for this to work, as otherwise 492 * we'll overflow the counter. We round the answer to nearest 1 493 * MHz of the master (2x) clock. 494 */ 495 roundtime = (1000000 / hz) / 2; 496 sampletime = (1000000 / hz) + 0xff; 497 startmsb = (sampletime >> 8); 498 499 s = splhigh(); 500 501 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 502 (TIMER_SEL2 | TIMER_16BIT | TIMER_RATEGEN)); 503 bus_space_write_1(iot, ioh, INT2_TIMER_2, (sampletime & 0xff)); 504 bus_space_write_1(iot, ioh, INT2_TIMER_2, (sampletime >> 8)); 505 506 startctr = mips3_cp0_count_read(); 507 508 /* Wait for the MSB to count down to zero */ 509 do { 510 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, TIMER_SEL2); 511 lsb = bus_space_read_1(iot, ioh, INT2_TIMER_2) & 0xff; 512 msb = bus_space_read_1(iot, ioh, INT2_TIMER_2) & 0xff; 513 514 endctr = mips3_cp0_count_read(); 515 } while (msb); 516 517 /* Turn off timer */ 518 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 519 (TIMER_SEL2 | TIMER_16BIT | TIMER_SWSTROBE)); 520 521 splx(s); 522 523 return (endctr - startctr) / roundtime * roundtime; 524 } 525 #endif /* MIPS3 */ 526 527 /* 528 * A master clock is wired to TIMER_2, which in turn clocks the two other 529 * timers. The master frequencies are as follows: 530 * IP6, IP10: 3.6864MHz 531 * IP12, IP20, IP22: 1MHz 532 * IP17: 10MHz 533 * 534 * TIMER_0 and TIMER_1 interrupts are tied to MIPS interrupts as follows: 535 * IP6, IP10: TIMER_0: INT2, TIMER_1: INT4 536 * IP12: TIMER_0: INT3, TIMER_1: INT4 537 * IP17, IP20, IP22: TIMER_0: INT2, TIMER_1: INT3 538 * 539 * NB: Apparently int2 doesn't like counting down from one, but two works. 540 */ 541 void 542 int_8254_cal(void) 543 { 544 bus_size_t timer_control, timer_0, timer_1, timer_2; 545 int s; 546 547 switch (mach_type) { 548 case MACH_SGI_IP6 | MACH_SGI_IP10: 549 int_8254_timecounter.tc_frequency = 3686400 / 8; 550 timer_control = INT1_TIMER_CONTROL; 551 timer_0 = INT1_TIMER_0; 552 timer_1 = INT1_TIMER_1; 553 timer_2 = INT1_TIMER_2; 554 break; 555 556 case MACH_SGI_IP12: 557 int_8254_timecounter.tc_frequency = 1000000 / 8; 558 timer_control = INT2_TIMER_CONTROL; 559 timer_0 = INT2_TIMER_0; 560 timer_1 = INT2_TIMER_1; 561 timer_2 = INT2_TIMER_2; 562 break; 563 564 default: 565 panic("int_8254_cal"); 566 } 567 568 s = splhigh(); 569 570 /* Timer0 is our hz. */ 571 bus_space_write_1(iot, ioh, timer_control, 572 TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT); 573 bus_space_write_1(iot, ioh, timer_0, 574 (int_8254_timecounter.tc_frequency / hz) % 256); 575 wbflush(); 576 delay(4); 577 bus_space_write_1(iot, ioh, timer_0, 578 (int_8254_timecounter.tc_frequency / hz) / 256); 579 580 /* Timer1 is for timecounting. */ 581 bus_space_write_1(iot, ioh, timer_control, 582 TIMER_SEL1 | TIMER_RATEGEN | TIMER_16BIT); 583 bus_space_write_1(iot, ioh, timer_1, 0xff); 584 wbflush(); 585 delay(4); 586 bus_space_write_1(iot, ioh, timer_1, 0xff); 587 588 /* Timer2 clocks timer0 and timer1. */ 589 bus_space_write_1(iot, ioh, timer_control, 590 TIMER_SEL2 | TIMER_RATEGEN | TIMER_16BIT); 591 bus_space_write_1(iot, ioh, timer_2, 8); 592 wbflush(); 593 delay(4); 594 bus_space_write_1(iot, ioh, timer_2, 0); 595 596 splx(s); 597 598 tc_init(&int_8254_timecounter); 599 } 600 601 static u_int 602 int_8254_get_timecount(struct timecounter *tc) 603 { 604 int s; 605 u_int count; 606 u_char lo, hi; 607 608 s = splhigh(); 609 610 switch (mach_type) { 611 case MACH_SGI_IP6 | MACH_SGI_IP10: 612 bus_space_write_1(iot, ioh, INT1_TIMER_CONTROL, 613 TIMER_SEL1 | TIMER_LATCH); 614 lo = bus_space_read_1(iot, ioh, INT1_TIMER_1); 615 hi = bus_space_read_1(iot, ioh, INT1_TIMER_1); 616 break; 617 618 case MACH_SGI_IP12: 619 bus_space_write_1(iot, ioh, INT2_TIMER_CONTROL, 620 TIMER_SEL1 | TIMER_LATCH); 621 lo = bus_space_read_1(iot, ioh, INT2_TIMER_1); 622 hi = bus_space_read_1(iot, ioh, INT2_TIMER_1); 623 break; 624 625 default: 626 panic("int_8254_get_timecount"); 627 } 628 629 count = 0xffff - ((hi << 8) | lo); 630 splx(s); 631 632 return (int_8254_tc_count + count); 633 } 634 635 static void 636 int_8254_intr0(vaddr_t pc, uint32_t status, uint32_t ipending) 637 { 638 struct clockframe cf; 639 640 cf.pc = pc; 641 cf.sr = status; 642 643 hardclock(&cf); 644 645 switch (mach_type) { 646 case MACH_SGI_IP6 | MACH_SGI_IP10: 647 bus_space_read_1(iot, ioh, INT1_TIMER_0_ACK); 648 break; 649 650 case MACH_SGI_IP12: 651 bus_space_write_1(iot, ioh, INT2_TIMER_CLEAR, 0x01); 652 break; 653 654 default: 655 panic("int_8254_intr0"); 656 } 657 } 658 659 static void 660 int_8254_intr1(vaddr_t pc, uint32_t status, uint32_t ipending) 661 { 662 int s; 663 664 s = splhigh(); 665 666 int_8254_tc_count += 0xffff; 667 switch (mach_type) { 668 case MACH_SGI_IP6 | MACH_SGI_IP10: 669 bus_space_read_1(iot, ioh, INT1_TIMER_1_ACK); 670 break; 671 672 case MACH_SGI_IP12: 673 bus_space_write_1(iot, ioh, INT2_TIMER_CLEAR, 0x02); 674 break; 675 676 default: 677 panic("int_8254_intr1"); 678 } 679 680 splx(s); 681 } 682 683 void 684 int2_wait_fifo(uint32_t flag) 685 { 686 687 if (ioh == 0) 688 delay(5000); 689 else 690 while (bus_space_read_1(iot, ioh, INT2_LOCAL0_STATUS) & flag) 691 ; 692 } 693
Indexes created Tue Sep 23 22:09:46 GMT 2025