clock.c revision 1.6
1 /* $NetBSD: clock.c,v 1.6 1994/10/26 02:02:51 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 41 * 42 * @(#)clock.c 7.6 (Berkeley) 5/7/91 43 */ 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 #include <machine/psl.h> 49 #include <machine/cpu.h> 50 #include <amiga/amiga/device.h> 51 #include <amiga/amiga/custom.h> 52 #include <amiga/amiga/cia.h> 53 #include <amiga/dev/rtc.h> 54 #include <amiga/dev/ztwobusvar.h> 55 56 #if defined(PROF) && defined(PROFTIMER) 57 #include <sys/PROF.h> 58 #endif 59 60 /* the clocks run at NTSC: 715.909kHz or PAL: 709.379kHz. 61 We're using a 100 Hz clock. */ 62 63 #define CLK_INTERVAL amiga_clk_interval 64 int amiga_clk_interval; 65 int eclockfreq; 66 67 /* 68 * Machine-dependent clock routines. 69 * 70 * Startrtclock restarts the real-time clock, which provides 71 * hardclock interrupts to kern_clock.c. 72 * 73 * Inittodr initializes the time of day hardware which provides 74 * date functions. 75 * 76 * Resettodr restores the time of day hardware after a time change. 77 * 78 * A note on the real-time clock: 79 * We actually load the clock with CLK_INTERVAL-1 instead of CLK_INTERVAL. 80 * This is because the counter decrements to zero after N+1 enabled clock 81 * periods where N is the value loaded into the counter. 82 */ 83 84 int clockmatch __P((struct device *, struct cfdata *, void *)); 85 void clockattach __P((struct device *, struct device *, void *)); 86 87 struct cfdriver clockcd = { 88 NULL, "clock", clockmatch, clockattach, 89 DV_DULL, sizeof(struct device), NULL, 0 }; 90 91 int 92 clockmatch(pdp, cfp, auxp) 93 struct device *pdp; 94 struct cfdata *cfp; 95 void *auxp; 96 { 97 if (matchname("clock", auxp)) 98 return(1); 99 return(0); 100 } 101 102 /* 103 * Start the real-time clock. 104 */ 105 void 106 clockattach(pdp, dp, auxp) 107 struct device *pdp, *dp; 108 void *auxp; 109 { 110 unsigned short interval; 111 112 if (eclockfreq == 0) 113 eclockfreq = 715909; /* guess NTSC */ 114 115 CLK_INTERVAL = (eclockfreq / 100); 116 117 printf(": system hz %d hardware hz %d\n", hz, eclockfreq); 118 119 /* 120 * stop timer A 121 */ 122 ciab.cra = ciab.cra & 0xc0; 123 ciab.icr = 1 << 0; /* disable timer A interrupt */ 124 interval = ciab.icr; /* and make sure it's clear */ 125 126 /* 127 * load interval into registers. 128 * the clocks run at NTSC: 715.909kHz or PAL: 709.379kHz 129 * supprort for PAL WHEN?!?! XXX 130 */ 131 interval = CLK_INTERVAL - 1; 132 133 /* 134 * order of setting is important ! 135 */ 136 ciab.talo = interval & 0xff; 137 ciab.tahi = interval >> 8; 138 } 139 140 void 141 cpu_initclocks() 142 { 143 /* 144 * enable interrupts for timer A 145 */ 146 ciab.icr = (1<<7) | (1<<0); 147 148 /* 149 * start timer A in continuous shot mode 150 */ 151 ciab.cra = (ciab.cra & 0xc0) | 1; 152 153 /* 154 * and globally enable interrupts for ciab 155 */ 156 custom.intena = INTF_SETCLR | INTF_EXTER; 157 } 158 159 setstatclockrate(hz) 160 int hz; 161 { 162 } 163 164 /* 165 * Returns number of usec since last recorded clock "tick" 166 * (i.e. clock interrupt). 167 */ 168 clkread() 169 { 170 u_char hi, hi2, lo; 171 u_int interval; 172 173 hi = ciab.tahi; 174 lo = ciab.talo; 175 hi2 = ciab.tahi; 176 if (hi != hi2) { 177 lo = ciab.talo; 178 hi = hi2; 179 } 180 181 interval = (CLK_INTERVAL - 1) - ((hi<<8) | lo); 182 183 /* 184 * should read ICR and if there's an int pending, adjust interval. 185 * However, * since reading ICR clears the interrupt, we'd lose a 186 * hardclock int, and * this is not tolerable. 187 */ 188 189 return((interval * tick) / CLK_INTERVAL); 190 } 191 192 u_int micspertick; 193 194 /* 195 * we set up as much of the CIAa as possible 196 * as all access to chip memory are very slow. 197 */ 198 void 199 setmicspertick() 200 { 201 micspertick = (1000000ULL << 20) / 715909; 202 203 /* 204 * disable interrupts (just in case.) 205 */ 206 ciaa.icr = 0x3; 207 208 /* 209 * stop both timers if not already 210 */ 211 ciaa.cra &= ~1; 212 ciaa.crb &= ~1; 213 214 /* 215 * set timer B in "count timer A underflows" mode 216 * set tiemr A in one-shot mode 217 */ 218 ciaa.crb = (ciaa.crb & 0x80) | 0x48; 219 ciaa.cra = (ciaa.cra & 0xc0) | 0x08; 220 } 221 222 /* 223 * this function assumes that on any entry beyond the first 224 * the following condintions exist: 225 * Interrupts for Timers A and B are disabled. 226 * Timers A and B are stoped. 227 * Timers A and B are in one-shot mode with B counting timer A underflows 228 * 229 */ 230 void 231 delay(mic) 232 int mic; 233 { 234 u_int temp; 235 int s; 236 237 if (micspertick == 0) 238 setmicspertick(); 239 240 if (mic <= 1) 241 return; 242 243 /* 244 * basically this is going to do an integer 245 * usec / (1000000 / 715909) with no loss of 246 * precision 247 */ 248 temp = mic >> 12; 249 asm("divul %3,%1:%0" : "=d" (temp) : "d" (mic >> 12), "0" (mic << 20), 250 "d" (micspertick)); 251 252 if ((temp & 0xffff0000) > 0x10000) { 253 mic = (temp >> 16) - 1; 254 temp &= 0xffff; 255 256 /* 257 * set timer A in continous mode 258 */ 259 ciaa.cra = (ciaa.cra & 0xc0) | 0x00; 260 261 /* 262 * latch/load/start "counts of timer A underflows" in B 263 */ 264 ciaa.tblo = mic & 0xff; 265 ciaa.tbhi = mic >> 8; 266 267 /* 268 * timer A latches 0xffff 269 * and start it. 270 */ 271 ciaa.talo = 0xff; 272 ciaa.tahi = 0xff; 273 ciaa.cra |= 1; 274 275 while (ciaa.crb & 1) 276 ; 277 278 /* 279 * stop timer A 280 */ 281 ciaa.cra &= ~1; 282 283 /* 284 * set timer A in one shot mode 285 */ 286 ciaa.cra = (ciaa.cra & 0xc0) | 0x08; 287 } else if ((temp & 0xffff0000) == 0x10000) { 288 temp &= 0xffff; 289 290 /* 291 * timer A is in one shot latch/load/start 1 full turn 292 */ 293 ciaa.talo = 0xff; 294 ciaa.tahi = 0xff; 295 while (ciaa.cra & 1) 296 ; 297 } 298 if (temp < 1) 299 return; 300 301 /* 302 * temp is now residual ammount, latch/load/start it. 303 */ 304 ciaa.talo = temp & 0xff; 305 ciaa.tahi = temp >> 8; 306 while (ciaa.cra & 1) 307 ; 308 } 309 310 /* 311 * Needs to be calibrated for use, its way off most of the time 312 */ 313 void 314 DELAY(mic) 315 int mic; 316 { 317 u_long n; 318 short hpos; 319 320 /* 321 * this function uses HSync pulses as base units. The custom chips 322 * display only deals with 31.6kHz/2 refresh, this gives us a 323 * resolution of 1/15800 s, which is ~63us (add some fuzz so we really 324 * wait awhile, even if using small timeouts) 325 */ 326 n = mic/63 + 2; 327 do { 328 hpos = custom.vhposr & 0xff00; 329 while (hpos == (custom.vhposr & 0xff00)) 330 ; 331 } while (n--); 332 } 333 334 #if notyet 335 336 /* implement this later. I'd suggest using both timers in CIA-A, they're 337 not yet used. */ 338 339 #include "clock.h" 340 #if NCLOCK > 0 341 /* 342 * /dev/clock: mappable high resolution timer. 343 * 344 * This code implements a 32-bit recycling counter (with a 4 usec period) 345 * using timers 2 & 3 on the 6840 clock chip. The counter can be mapped 346 * RO into a user's address space to achieve low overhead (no system calls), 347 * high-precision timing. 348 * 349 * Note that timer 3 is also used for the high precision profiling timer 350 * (PROFTIMER code above). Care should be taken when both uses are 351 * configured as only a token effort is made to avoid conflicting use. 352 */ 353 #include <sys/proc.h> 354 #include <sys/resourcevar.h> 355 #include <sys/ioctl.h> 356 #include <sys/malloc.h> 357 #include <vm/vm.h> 358 #include <amiga/amiga/clockioctl.h> 359 #include <sys/specdev.h> 360 #include <sys/vnode.h> 361 #include <sys/mman.h> 362 363 int clockon = 0; /* non-zero if high-res timer enabled */ 364 #ifdef PROFTIMER 365 int profprocs = 0; /* # of procs using profiling timer */ 366 #endif 367 #ifdef DEBUG 368 int clockdebug = 0; 369 #endif 370 371 /*ARGSUSED*/ 372 clockopen(dev, flags) 373 dev_t dev; 374 { 375 #ifdef PROFTIMER 376 #ifdef PROF 377 /* 378 * Kernel profiling enabled, give up. 379 */ 380 if (profiling) 381 return(EBUSY); 382 #endif 383 /* 384 * If any user processes are profiling, give up. 385 */ 386 if (profprocs) 387 return(EBUSY); 388 #endif 389 if (!clockon) { 390 startclock(); 391 clockon++; 392 } 393 return(0); 394 } 395 396 /*ARGSUSED*/ 397 clockclose(dev, flags) 398 dev_t dev; 399 { 400 (void) clockunmmap(dev, (caddr_t)0, curproc); /* XXX */ 401 stopclock(); 402 clockon = 0; 403 return(0); 404 } 405 406 /*ARGSUSED*/ 407 clockioctl(dev, cmd, data, flag, p) 408 dev_t dev; 409 caddr_t data; 410 struct proc *p; 411 { 412 int error = 0; 413 414 switch (cmd) { 415 416 case CLOCKMAP: 417 error = clockmmap(dev, (caddr_t *)data, p); 418 break; 419 420 case CLOCKUNMAP: 421 error = clockunmmap(dev, *(caddr_t *)data, p); 422 break; 423 424 case CLOCKGETRES: 425 *(int *)data = CLK_RESOLUTION; 426 break; 427 428 default: 429 error = EINVAL; 430 break; 431 } 432 return(error); 433 } 434 435 /*ARGSUSED*/ 436 clockmap(dev, off, prot) 437 dev_t dev; 438 { 439 return((off + (INTIOBASE+CLKBASE+CLKSR-1)) >> PGSHIFT); 440 } 441 442 clockmmap(dev, addrp, p) 443 dev_t dev; 444 caddr_t *addrp; 445 struct proc *p; 446 { 447 int error; 448 struct vnode vn; 449 struct specinfo si; 450 int flags; 451 452 flags = MAP_FILE|MAP_SHARED; 453 if (*addrp) 454 flags |= MAP_FIXED; 455 else 456 *addrp = (caddr_t)0x1000000; /* XXX */ 457 vn.v_type = VCHR; /* XXX */ 458 vn.v_specinfo = &si; /* XXX */ 459 vn.v_rdev = dev; /* XXX */ 460 error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *)addrp, 461 PAGE_SIZE, VM_PROT_ALL, flags, (caddr_t)&vn, 0); 462 return(error); 463 } 464 465 clockunmmap(dev, addr, p) 466 dev_t dev; 467 caddr_t addr; 468 struct proc *p; 469 { 470 int rv; 471 472 if (addr == 0) 473 return(EINVAL); /* XXX: how do we deal with this? */ 474 rv = vm_deallocate(p->p_vmspace->vm_map, (vm_offset_t)addr, PAGE_SIZE); 475 return(rv == KERN_SUCCESS ? 0 : EINVAL); 476 } 477 478 startclock() 479 { 480 register struct clkreg *clk = (struct clkreg *)clkstd[0]; 481 482 clk->clk_msb2 = -1; clk->clk_lsb2 = -1; 483 clk->clk_msb3 = -1; clk->clk_lsb3 = -1; 484 485 clk->clk_cr2 = CLK_CR3; 486 clk->clk_cr3 = CLK_OENAB|CLK_8BIT; 487 clk->clk_cr2 = CLK_CR1; 488 clk->clk_cr1 = CLK_IENAB; 489 } 490 491 stopclock() 492 { 493 register struct clkreg *clk = (struct clkreg *)clkstd[0]; 494 495 clk->clk_cr2 = CLK_CR3; 496 clk->clk_cr3 = 0; 497 clk->clk_cr2 = CLK_CR1; 498 clk->clk_cr1 = CLK_IENAB; 499 } 500 #endif 501 502 #endif 503 504 505 #ifdef PROFTIMER 506 /* 507 * This code allows the amiga kernel to use one of the extra timers on 508 * the clock chip for profiling, instead of the regular system timer. 509 * The advantage of this is that the profiling timer can be turned up to 510 * a higher interrupt rate, giving finer resolution timing. The profclock 511 * routine is called from the lev6intr in locore, and is a specialized 512 * routine that calls addupc. The overhead then is far less than if 513 * hardclock/softclock was called. Further, the context switch code in 514 * locore has been changed to turn the profile clock on/off when switching 515 * into/out of a process that is profiling (startprofclock/stopprofclock). 516 * This reduces the impact of the profiling clock on other users, and might 517 * possibly increase the accuracy of the profiling. 518 */ 519 int profint = PRF_INTERVAL; /* Clock ticks between interrupts */ 520 int profscale = 0; /* Scale factor from sys clock to prof clock */ 521 char profon = 0; /* Is profiling clock on? */ 522 523 /* profon values - do not change, locore.s assumes these values */ 524 #define PRF_NONE 0x00 525 #define PRF_USER 0x01 526 #define PRF_KERNEL 0x80 527 528 initprofclock() 529 { 530 #if NCLOCK > 0 531 struct proc *p = curproc; /* XXX */ 532 533 /* 534 * If the high-res timer is running, force profiling off. 535 * Unfortunately, this gets reflected back to the user not as 536 * an error but as a lack of results. 537 */ 538 if (clockon) { 539 p->p_stats->p_prof.pr_scale = 0; 540 return; 541 } 542 /* 543 * Keep track of the number of user processes that are profiling 544 * by checking the scale value. 545 * 546 * XXX: this all assumes that the profiling code is well behaved; 547 * i.e. profil() is called once per process with pcscale non-zero 548 * to turn it on, and once with pcscale zero to turn it off. 549 * Also assumes you don't do any forks or execs. Oh well, there 550 * is always adb... 551 */ 552 if (p->p_stats->p_prof.pr_scale) 553 profprocs++; 554 else 555 profprocs--; 556 #endif 557 /* 558 * The profile interrupt interval must be an even divisor 559 * of the CLK_INTERVAL so that scaling from a system clock 560 * tick to a profile clock tick is possible using integer math. 561 */ 562 if (profint > CLK_INTERVAL || (CLK_INTERVAL % profint) != 0) 563 profint = CLK_INTERVAL; 564 profscale = CLK_INTERVAL / profint; 565 } 566 567 startprofclock() 568 { 569 unsigned short interval; 570 571 /* stop timer B */ 572 ciab.crb = ciab.crb & 0xc0; 573 574 /* load interval into registers. 575 the clocks run at NTSC: 715.909kHz or PAL: 709.379kHz */ 576 577 interval = profint - 1; 578 579 /* order of setting is important ! */ 580 ciab.tblo = interval & 0xff; 581 ciab.tbhi = interval >> 8; 582 583 /* enable interrupts for timer B */ 584 ciab.icr = (1<<7) | (1<<1); 585 586 /* start timer B in continuous shot mode */ 587 ciab.crb = (ciab.crb & 0xc0) | 1; 588 } 589 590 stopprofclock() 591 { 592 /* stop timer B */ 593 ciab.crb = ciab.crb & 0xc0; 594 } 595 596 #ifdef PROF 597 /* 598 * profclock() is expanded in line in lev6intr() unless profiling kernel. 599 * Assumes it is called with clock interrupts blocked. 600 */ 601 profclock(pc, ps) 602 caddr_t pc; 603 int ps; 604 { 605 /* 606 * Came from user mode. 607 * If this process is being profiled record the tick. 608 */ 609 if (USERMODE(ps)) { 610 if (p->p_stats.p_prof.pr_scale) 611 addupc(pc, &curproc->p_stats.p_prof, 1); 612 } 613 /* 614 * Came from kernel (supervisor) mode. 615 * If we are profiling the kernel, record the tick. 616 */ 617 else if (profiling < 2) { 618 register int s = pc - s_lowpc; 619 620 if (s < s_textsize) 621 kcount[s / (HISTFRACTION * sizeof (*kcount))]++; 622 } 623 /* 624 * Kernel profiling was on but has been disabled. 625 * Mark as no longer profiling kernel and if all profiling done, 626 * disable the clock. 627 */ 628 if (profiling && (profon & PRF_KERNEL)) { 629 profon &= ~PRF_KERNEL; 630 if (profon == PRF_NONE) 631 stopprofclock(); 632 } 633 } 634 #endif 635 #endif 636 637 /* this is a hook set by a clock driver for the configured realtime clock, 638 returning plain current unix-time */ 639 long (*gettod) __P((void)); 640 int (*settod) __P((long)); 641 void *clockaddr; 642 643 long a3gettod __P((void)); 644 long a2gettod __P((void)); 645 int a3settod __P((long)); 646 int a2settod __P((long)); 647 int rtcinit __P((void)); 648 649 /* 650 * Initialize the time of day register, based on the time base which is, e.g. 651 * from a filesystem. 652 */ 653 inittodr(base) 654 time_t base; 655 { 656 u_long timbuf = base; /* assume no battery clock exists */ 657 658 if (gettod == NULL && rtcinit() == 0) 659 printf("WARNING: no battery clock\n"); 660 else 661 timbuf = gettod(); 662 663 if (timbuf < base) { 664 printf("WARNING: bad date in battery clock\n"); 665 timbuf = base; 666 } 667 668 /* Battery clock does not store usec's, so forget about it. */ 669 time.tv_sec = timbuf; 670 } 671 672 resettodr() 673 { 674 if (settod && settod(time.tv_sec) == 1) 675 return; 676 printf("Cannot set battery backed clock\n"); 677 } 678 679 int 680 rtcinit() 681 { 682 clockaddr = (void *)ztwomap(0xdc0000); 683 if (is_a3000() || is_a4000()) { 684 if (a3gettod() == 0) 685 return(0); 686 gettod = a3gettod; 687 settod = a3settod; 688 } else { 689 if (a2gettod() == 0) 690 return(0); 691 gettod = a2gettod; 692 settod = a2settod; 693 } 694 return(1); 695 } 696 697 static int month_days[12] = { 698 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 699 }; 700 701 long 702 a3gettod() 703 { 704 struct rtclock3000 *rt; 705 int i, year, month, day, hour, min, sec; 706 u_long tmp; 707 708 rt = clockaddr; 709 710 /* hold clock */ 711 rt->control1 = A3CONTROL1_HOLD_CLOCK; 712 713 /* read it */ 714 sec = rt->second1 * 10 + rt->second2; 715 min = rt->minute1 * 10 + rt->minute2; 716 hour = rt->hour1 * 10 + rt->hour2; 717 day = rt->day1 * 10 + rt->day2; 718 month = rt->month1 * 10 + rt->month2; 719 year = rt->year1 * 10 + rt->year2 + 1900; 720 721 /* let it run again.. */ 722 rt->control1 = A3CONTROL1_FREE_CLOCK; 723 724 if (range_test(hour, 0, 23)) 725 return(0); 726 if (range_test(day, 1, 31)) 727 return(0); 728 if (range_test(month, 1, 12)) 729 return(0); 730 if (range_test(year, STARTOFTIME, 2000)) 731 return(0); 732 733 tmp = 0; 734 735 for (i = STARTOFTIME; i < year; i++) 736 tmp += days_in_year(i); 737 if (leapyear(year) && month > FEBRUARY) 738 tmp++; 739 740 for (i = 1; i < month; i++) 741 tmp += days_in_month(i); 742 743 tmp += (day - 1); 744 tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec; 745 746 return(tmp); 747 } 748 749 int 750 a3settod(tim) 751 long tim; 752 { 753 register int i; 754 register long hms, day; 755 u_char sec1, sec2; 756 u_char min1, min2; 757 u_char hour1, hour2; 758 u_char day1, day2; 759 u_char mon1, mon2; 760 u_char year1, year2; 761 struct rtclock3000 *rt; 762 763 rt = clockaddr; 764 /* 765 * there seem to be problems with the bitfield addressing 766 * currently used.. 767 */ 768 return(0); 769 #if not_yet 770 if (rt) 771 return 0; 772 773 /* prepare values to be written to clock */ 774 day = tim / SECDAY; 775 hms = tim % SECDAY; 776 777 hour2 = hms / 3600; 778 hour1 = hour2 / 10; 779 hour2 %= 10; 780 781 min2 = (hms % 3600) / 60; 782 min1 = min2 / 10; 783 min2 %= 10; 784 785 786 sec2 = (hms % 3600) % 60; 787 sec1 = sec2 / 10; 788 sec2 %= 10; 789 790 /* Number of years in days */ 791 for (i = STARTOFTIME - 1900; day >= days_in_year(i); i++) 792 day -= days_in_year(i); 793 year1 = i / 10; 794 year2 = i % 10; 795 796 /* Number of months in days left */ 797 if (leapyear(i)) 798 days_in_month(FEBRUARY) = 29; 799 for (i = 1; day >= days_in_month(i); i++) 800 day -= days_in_month(i); 801 days_in_month(FEBRUARY) = 28; 802 803 mon1 = i / 10; 804 mon2 = i % 10; 805 806 /* Days are what is left over (+1) from all that. */ 807 day ++; 808 day1 = day / 10; 809 day2 = day % 10; 810 811 rt->control1 = CONTROL1_HOLD_CLOCK; 812 rt->second1 = sec1; 813 rt->second2 = sec2; 814 rt->minute1 = min1; 815 rt->minute2 = min2; 816 rt->hour1 = hour1; 817 rt->hour2 = hour2; 818 rt->day1 = day1; 819 rt->day2 = day2; 820 rt->month1 = mon1; 821 rt->month2 = mon2; 822 rt->year1 = year1; 823 rt->year2 = year2; 824 rt->control2 = CONTROL1_FREE_CLOCK; 825 826 return 1; 827 #endif 828 } 829 830 long 831 a2gettod() 832 { 833 struct rtclock2000 *rt; 834 int i, year, month, day, hour, min, sec; 835 u_long tmp; 836 837 rt = clockaddr; 838 839 /* 840 * hold clock 841 */ 842 rt->control1 |= A2CONTROL1_HOLD; 843 while (rt->control1 & A2CONTROL1_BUSY) 844 ; 845 846 /* 847 * read it 848 */ 849 sec = rt->second1 * 10 + rt->second2; 850 min = rt->minute1 * 10 + rt->minute2; 851 hour = (rt->hour1 & 3) * 10 + rt->hour2; 852 day = rt->day1 * 10 + rt->day2; 853 month = rt->month1 * 10 + rt->month2; 854 year = rt->year1 * 10 + rt->year2 + 1900; 855 856 if ((rt->control3 & A2CONTROL3_24HMODE) == 0) { 857 if ((rt->hour1 & A2HOUR1_PM) == 0 && hour == 12) 858 hour = 0; 859 else if ((rt->hour1 & A2HOUR1_PM) && hour != 12) 860 hour += 12; 861 } 862 863 /* 864 * release the clock 865 */ 866 rt->control1 &= ~A2CONTROL1_HOLD; 867 868 if (range_test(hour, 0, 23)) 869 return(0); 870 if (range_test(day, 1, 31)) 871 return(0); 872 if (range_test(month, 1, 12)) 873 return(0); 874 if (range_test(year, STARTOFTIME, 2000)) 875 return(0); 876 877 tmp = 0; 878 879 for (i = STARTOFTIME; i < year; i++) 880 tmp += days_in_year(i); 881 if (leapyear(year) && month > FEBRUARY) 882 tmp++; 883 884 for (i = 1; i < month; i++) 885 tmp += days_in_month(i); 886 887 tmp += (day - 1); 888 tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec; 889 890 return(tmp); 891 } 892 893 /* 894 * there is some question as to whether this works 895 * I guess 896 */ 897 int 898 a2settod(tim) 899 long tim; 900 { 901 902 int i; 903 long hms, day; 904 u_char sec1, sec2; 905 u_char min1, min2; 906 u_char hour1, hour2; 907 u_char day1, day2; 908 u_char mon1, mon2; 909 u_char year1, year2; 910 struct rtclock2000 *rt; 911 912 rt = clockaddr; 913 /* 914 * there seem to be problems with the bitfield addressing 915 * currently used.. 916 * 917 * XXX Check out the above where we (hour1 & 3) 918 */ 919 return(0); 920 #if not_yet 921 if (! rt) 922 return 0; 923 924 /* prepare values to be written to clock */ 925 day = tim / SECDAY; 926 hms = tim % SECDAY; 927 928 hour2 = hms / 3600; 929 hour1 = hour2 / 10; 930 hour2 %= 10; 931 932 min2 = (hms % 3600) / 60; 933 min1 = min2 / 10; 934 min2 %= 10; 935 936 937 sec2 = (hms % 3600) % 60; 938 sec1 = sec2 / 10; 939 sec2 %= 10; 940 941 /* Number of years in days */ 942 for (i = STARTOFTIME - 1900; day >= days_in_year(i); i++) 943 day -= days_in_year(i); 944 year1 = i / 10; 945 year2 = i % 10; 946 947 /* Number of months in days left */ 948 if (leapyear(i)) 949 days_in_month(FEBRUARY) = 29; 950 for (i = 1; day >= days_in_month(i); i++) 951 day -= days_in_month(i); 952 days_in_month(FEBRUARY) = 28; 953 954 mon1 = i / 10; 955 mon2 = i % 10; 956 957 /* Days are what is left over (+1) from all that. */ 958 day ++; 959 day1 = day / 10; 960 day2 = day % 10; 961 962 /* 963 * XXXX spin wait as with reading??? 964 */ 965 rt->control1 = A2CONTROL1_HOLD_CLOCK; 966 rt->second1 = sec1; 967 rt->second2 = sec2; 968 rt->minute1 = min1; 969 rt->minute2 = min2; 970 rt->hour1 = hour1; 971 rt->hour2 = hour2; 972 rt->day1 = day1; 973 rt->day2 = day2; 974 rt->month1 = mon1; 975 rt->month2 = mon2; 976 rt->year1 = year1; 977 rt->year2 = year2; 978 rt->control2 = CONTROL1_FREE_CLOCK; 979 980 return 1; 981 #endif 982 } 983
Indexes created Fri Sep 26 20:09:58 GMT 2025