diff options
Diffstat (limited to 'sys/isa/atrtc.c')
| -rw-r--r-- | sys/isa/atrtc.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c deleted file mode 100644 index 53497c8..0000000 --- a/sys/isa/atrtc.c +++ /dev/null @@ -1,252 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * William Jolitz and Don Ahn. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id$ - */ - -/* - * Primitive clock interrupt routines. - */ -#include "param.h" -#include "systm.h" -#include "time.h" -#include "kernel.h" -#include "machine/segments.h" -#include "i386/isa/icu.h" -#include "i386/isa/isa.h" -#include "i386/isa/rtc.h" -#include "i386/isa/timerreg.h" - -#define DAYST 119 -#define DAYEN 303 - -/* X-tals being what they are, it's nice to be able to fudge this one... */ -/* Note, the name changed here from XTALSPEED to TIMER_FREQ rgrimes 4/26/93 */ -#ifndef TIMER_FREQ -#define TIMER_FREQ 1193182 /* XXX - should be in isa.h */ -#endif - -startrtclock() { - int s; - - findcpuspeed(); /* use the clock (while it's free) - to find the cpu speed */ - /* initialize 8253 clock */ - outb(TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT); - - /* Correct rounding will buy us a better precision in timekeeping */ - outb (IO_TIMER1, (TIMER_FREQ+hz/2)/hz); - outb (IO_TIMER1, ((TIMER_FREQ+hz/2)/hz)/256); - - /* initialize brain-dead battery powered clock */ - outb (IO_RTC, RTC_STATUSA); - outb (IO_RTC+1, 0x26); - outb (IO_RTC, RTC_STATUSB); - outb (IO_RTC+1, 2); - - outb (IO_RTC, RTC_DIAG); - if (s = inb (IO_RTC+1)) - printf("RTC BIOS diagnostic error %b\n", s, RTCDG_BITS); - outb (IO_RTC, RTC_DIAG); - outb (IO_RTC+1, 0); -} - -unsigned int delaycount; /* calibrated loop variable (1 millisecond) */ - -#define FIRST_GUESS 0x2000 -findcpuspeed() -{ - unsigned char low; - unsigned int remainder; - - /* Put counter in count down mode */ - outb(IO_TIMER1+3, 0x34); - outb(IO_TIMER1, 0xff); - outb(IO_TIMER1, 0xff); - delaycount = FIRST_GUESS; - spinwait(1); - /* Read the value left in the counter */ - low = inb(IO_TIMER1); /* least siginifcant */ - remainder = inb(IO_TIMER1); /* most significant */ - remainder = (remainder<<8) + low ; - /* Formula for delaycount is : - * (loopcount * timer clock speed)/ (counter ticks * 1000) - */ - delaycount = (FIRST_GUESS * (TIMER_FREQ/1000)) / (0xffff-remainder); -} - - -/* convert 2 digit BCD number */ -bcd(i) -int i; -{ - return ((i/16)*10 + (i%16)); -} - -/* convert years to seconds (from 1970) */ -unsigned long -ytos(y) -int y; -{ - int i; - unsigned long ret; - - ret = 0; - for(i = 1970; i < y; i++) { - if (i % 4) ret += 365*24*60*60; - else ret += 366*24*60*60; - } - return ret; -} - -/* convert months to seconds */ -unsigned long -mtos(m,leap) -int m,leap; -{ - int i; - unsigned long ret; - - ret = 0; - for(i=1;i<m;i++) { - switch(i){ - case 1: case 3: case 5: case 7: case 8: case 10: case 12: - ret += 31*24*60*60; break; - case 4: case 6: case 9: case 11: - ret += 30*24*60*60; break; - case 2: - if (leap) ret += 29*24*60*60; - else ret += 28*24*60*60; - } - } - return ret; -} - - -/* - * Initialize the time of day register, based on the time base which is, e.g. - * from a filesystem. - */ -inittodr(base) - time_t base; -{ - unsigned long sec; - int leap,day_week,t,yd; - int sa,s; - - /* do we have a realtime clock present? (otherwise we loop below) */ - sa = rtcin(RTC_STATUSA); - if (sa == 0xff || sa == 0) return; - - /* ready for a read? */ - while ((sa&RTCSA_TUP) == RTCSA_TUP) - sa = rtcin(RTC_STATUSA); - - sec = bcd(rtcin(RTC_YEAR)) + 1900; - if (sec < 1970) - sec += 100; - leap = !(sec % 4); sec = ytos(sec); /* year */ - yd = mtos(bcd(rtcin(RTC_MONTH)),leap); sec += yd; /* month */ - t = (bcd(rtcin(RTC_DAY))-1) * 24*60*60; sec += t; yd += t; /* date */ - day_week = rtcin(RTC_WDAY); /* day */ - sec += bcd(rtcin(RTC_HRS)) * 60*60; /* hour */ - sec += bcd(rtcin(RTC_MIN)) * 60; /* minutes */ - sec += bcd(rtcin(RTC_SEC)); /* seconds */ - - /* XXX off by one? Need to calculate DST on SUNDAY */ - /* Perhaps we should have the RTC hold GMT time to save */ - /* us the bother of converting. */ - yd = yd / (24*60*60); - if ((yd >= DAYST) && ( yd <= DAYEN)) { - sec -= 60*60; - } - sec += tz.tz_minuteswest * 60; - - time.tv_sec = sec; -} - -#ifdef garbage -/* - * Initialze the time of day register, based on the time base which is, e.g. - * from a filesystem. - */ -test_inittodr(base) - time_t base; -{ - - outb(IO_RTC,9); /* year */ - printf("%d ",bcd(inb(IO_RTC+1))); - outb(IO_RTC,8); /* month */ - printf("%d ",bcd(inb(IO_RTC+1))); - outb(IO_RTC,7); /* day */ - printf("%d ",bcd(inb(IO_RTC+1))); - outb(IO_RTC,4); /* hour */ - printf("%d ",bcd(inb(IO_RTC+1))); - outb(IO_RTC,2); /* minutes */ - printf("%d ",bcd(inb(IO_RTC+1))); - outb(IO_RTC,0); /* seconds */ - printf("%d\n",bcd(inb(IO_RTC+1))); - - time.tv_sec = base; -} -#endif - -/* - * Restart the clock. - */ -resettodr() -{ -} - -/* - * Wire clock interrupt in. - */ -#define V(s) __CONCAT(V, s) -extern V(clk)(); -enablertclock() { - setidt(ICU_OFFSET+0, &V(clk), SDT_SYS386IGT, SEL_KPL); - INTREN(IRQ0); -} - -/* - * Delay for some number of milliseconds. - */ -void -spinwait(millisecs) - int millisecs; -{ - DELAY(1000 * millisecs); -} |
