diff --git a/sys/alpha/alpha/clock.c b/sys/alpha/alpha/clock.c index ef32268fa8cc..649b8caeddd4 100644 --- a/sys/alpha/alpha/clock.c +++ b/sys/alpha/alpha/clock.c @@ -1,445 +1,445 @@ -/* $Id: clock.c,v 1.3 1998/07/22 08:16:34 dfr Exp $ */ +/* $Id: clock.c,v 1.4 1998/10/06 08:40:18 dfr Exp $ */ /* $NetBSD: clock.c,v 1.20 1998/01/31 10:32:47 ross Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department and Ralph Campbell. * * 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: Utah Hdr: clock.c 1.18 91/01/21 * * @(#)clock.c 8.1 (Berkeley) 6/10/93 */ #include /* RCS ID & Copyright macro defns */ #include #include #include #include #include #include #include #include #include #define SECMIN ((unsigned)60) /* seconds per minute */ #define SECHOUR ((unsigned)(60*SECMIN)) /* seconds per hour */ #define SECDAY ((unsigned)(24*SECHOUR)) /* seconds per day */ #define SECYR ((unsigned)(365*SECDAY)) /* seconds per common year */ #define LEAPYEAR(year) (((year) % 4) == 0) device_t clockdev; int clockinitted; int tickfix; int tickfixinterval; int adjkerntz; /* local offset from GMT in seconds */ int disable_rtc_set; /* disable resettodr() if != 0 */ int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */ static int beeping = 0; extern int cycles_per_sec; static timecounter_get_t alpha_get_timecount; static timecounter_pps_t alpha_poll_pps; -static struct timecounter alpha_timecounter[3] = { +static struct timecounter alpha_timecounter = { alpha_get_timecount, /* get_timecount */ 0, /* no poll_pps */ ~0u, /* counter_mask */ 0, /* frequency */ "alpha" /* name */ }; SYSCTL_OPAQUE(_debug, OID_AUTO, alpha_timecounter, CTLFLAG_RD, - alpha_timecounter, sizeof(alpha_timecounter), "S,timecounter", ""); + &alpha_timecounter, sizeof(alpha_timecounter), "S,timecounter", ""); /* Values for timerX_state: */ #define RELEASED 0 #define RELEASE_PENDING 1 #define ACQUIRED 2 #define ACQUIRE_PENDING 3 /* static u_char timer0_state; */ static u_char timer2_state; /* * Algorithm for missed clock ticks from Linux/alpha. */ /* * Shift amount by which scaled_ticks_per_cycle is scaled. Shifting * by 48 gives us 16 bits for HZ while keeping the accuracy good even * for large CPU clock rates. */ #define FIX_SHIFT 48 static u_int64_t scaled_ticks_per_cycle; static u_int32_t max_cycles_per_tick; static u_int32_t last_time; static void handleclock(void* arg); void clockattach(device_t dev) { /* * Just bookkeeping. */ if (clockdev) panic("clockattach: multiple clocks"); clockdev = dev; #ifdef EVCNT_COUNTERS evcnt_attach(dev, "intr", &clock_intr_evcnt); #endif } /* * Machine-dependent clock routines. * * Startrtclock restarts the real-time clock, which provides * hardclock interrupts to kern_clock.c. * * Inittodr initializes the time of day hardware which provides * date functions. Its primary function is to use some file * system information in case the hardare clock lost state. * * Resettodr restores the time of day hardware after a time change. */ /* * Start the real-time and statistics clocks. Leave stathz 0 since there * are no other timers available. */ void cpu_initclocks() { if (clockdev == NULL) panic("cpu_initclocks: no clock attached"); tick = 1000000 / hz; /* number of microseconds between interrupts */ tickfix = 1000000 - (hz * tick); if (tickfix) { int ftp; ftp = min(ffs(tickfix), ffs(hz)); tickfix >>= (ftp - 1); tickfixinterval = hz >> (ftp - 1); } /* * Establish the clock interrupt; it's a special case. * * We establish the clock interrupt this late because if * we do it at clock attach time, we may have never been at * spl0() since taking over the system. Some versions of * PALcode save a clock interrupt, which would get delivered * when we spl0() in autoconf.c. If established the clock * interrupt handler earlier, that interrupt would go to * hardclock, which would then fall over because p->p_stats * isn't set at that time. */ last_time = alpha_rpcc(); scaled_ticks_per_cycle = ((u_int64_t)hz << FIX_SHIFT) / cycles_per_sec; max_cycles_per_tick = 2*cycles_per_sec / hz; - alpha_timecounter[0].tc_frequency = cycles_per_sec; - init_timecounter(alpha_timecounter); + alpha_timecounter.tc_frequency = cycles_per_sec; + init_timecounter(&alpha_timecounter); platform.clockintr = (void (*) __P((void *))) handleclock; /* * Get the clock started. */ CLOCK_INIT(clockdev); } static void handleclock(void* arg) { u_int32_t now = alpha_rpcc(); u_int32_t delta = now - last_time; last_time = now; if (delta > max_cycles_per_tick) { int i, missed_ticks; missed_ticks = (delta * scaled_ticks_per_cycle) >> FIX_SHIFT; for (i = 0; i < missed_ticks; i++) hardclock(arg); } hardclock(arg); setdelayed(); } /* * We assume newhz is either stathz or profhz, and that neither will * change after being set up above. Could recalculate intervals here * but that would be a drag. */ void setstatclockrate(newhz) int newhz; { /* nothing we can do */ } /* * This code is defunct after 2099. * Will Unix still be here then?? */ static short dayyr[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; /* * Initialze the time of day register, based on the time base which is, e.g. * from a filesystem. Base provides the time to within six months, * and the time of year clock (if any) provides the rest. */ void inittodr(base) time_t base; { register int days, yr; struct clocktime ct; time_t deltat; int badbase; int s; struct timespec ts; if (base < 5*SECYR) { printf("WARNING: preposterous time in file system"); /* read the system clock anyway */ base = 6*SECYR + 186*SECDAY + SECDAY/2; badbase = 1; } else badbase = 0; CLOCK_GET(clockdev, base, &ct); clockinitted = 1; /* simple sanity checks */ if (ct.year < 70 || ct.mon < 1 || ct.mon > 12 || ct.day < 1 || ct.day > 31 || ct.hour > 23 || ct.min > 59 || ct.sec > 59) { /* * Believe the time in the file system for lack of * anything better, resetting the TODR. */ s = splclock(); ts.tv_sec = base; ts.tv_nsec = 0; set_timecounter(&ts); splx(s); if (!badbase) { printf("WARNING: preposterous clock chip time\n"); resettodr(); } goto bad; } days = 0; for (yr = 70; yr < ct.year; yr++) days += LEAPYEAR(yr) ? 366 : 365; days += dayyr[ct.mon - 1] + ct.day - 1; if (LEAPYEAR(yr) && ct.mon > 2) days++; /* now have days since Jan 1, 1970; the rest is easy... */ s = splclock(); ts.tv_sec = days * SECDAY + ct.hour * SECHOUR + ct.min * SECMIN + ct.sec; if (wall_cmos_clock) ts.tv_sec += adjkerntz; ts.tv_nsec = 0; set_timecounter(&ts); splx(s); if (!badbase) { /* * See if we gained/lost two or more days; * if so, assume something is amiss. */ deltat = ts.tv_sec - base; if (deltat < 0) deltat = -deltat; if (deltat < 2 * SECDAY) return; printf("WARNING: clock %s %d days", ts.tv_sec < base ? "lost" : "gained", deltat / SECDAY); } bad: printf(" -- CHECK AND RESET THE DATE!\n"); } /* * Reset the TODR based on the time value; used when the TODR * has a preposterous value and also when the time is reset * by the stime system call. Also called when the TODR goes past * TODRZERO + 100*(SECYEAR+2*SECDAY) (e.g. on Jan 2 just after midnight) * to wrap the TODR around. */ void resettodr() { register int t, t2, s; struct clocktime ct; unsigned long tm; if (disable_rtc_set) return; s = splclock(); tm = time_second; splx(s); if (!clockinitted) return; /* Calculate local time to put in RTC */ tm -= (wall_cmos_clock ? adjkerntz : 0); /* compute the day of week. */ t2 = tm / SECDAY; ct.dow = (t2 + 4) % 7; /* 1/1/1970 was thursday */ /* compute the year */ ct.year = 69; t = t2; /* XXX ? */ while (t2 >= 0) { /* whittle off years */ t = t2; ct.year++; t2 -= LEAPYEAR(ct.year) ? 366 : 365; } /* t = month + day; separate */ t2 = LEAPYEAR(ct.year); for (ct.mon = 1; ct.mon < 12; ct.mon++) if (t < dayyr[ct.mon] + (t2 && ct.mon > 1)) break; ct.day = t - dayyr[ct.mon - 1] + 1; if (t2 && ct.mon > 2) ct.day--; /* the rest is easy */ t = tm % SECDAY; ct.hour = t / SECHOUR; t %= 3600; ct.min = t / SECMIN; ct.sec = t % SECMIN; CLOCK_SET(clockdev, &ct); } static unsigned alpha_get_timecount(struct timecounter* tc) { return alpha_rpcc(); } int acquire_timer2(int mode) { if (timer2_state != RELEASED) return (-1); timer2_state = ACQUIRED; /* * This access to the timer registers is as atomic as possible * because it is a single instruction. We could do better if we * knew the rate. Use of splclock() limits glitches to 10-100us, * and this is probably good enough for timer2, so we aren't as * careful with it as with timer0. */ outb(TIMER_MODE, TIMER_SEL2 | (mode & 0x3f)); return (0); } int release_timer2() { if (timer2_state != ACQUIRED) return (-1); timer2_state = RELEASED; outb(TIMER_MODE, TIMER_SEL2 | TIMER_SQWAVE | TIMER_16BIT); return (0); } static void sysbeepstop(void *chan) { outb(IO_PPI, inb(IO_PPI)&0xFC); /* disable counter2 output to speaker */ release_timer2(); beeping = 0; } /* * Frequency of all three count-down timers; (TIMER_FREQ/freq) is the * appropriate count to generate a frequency of freq hz. */ #ifndef TIMER_FREQ #define TIMER_FREQ 1193182 #endif #define TIMER_DIV(x) ((TIMER_FREQ+(x)/2)/(x)) int sysbeep(int pitch, int period) { int x = splhigh(); if (acquire_timer2(TIMER_SQWAVE|TIMER_16BIT)) if (!beeping) { /* Something else owns it. */ splx(x); return (-1); /* XXX Should be EBUSY, but nobody cares anyway. */ } pitch = TIMER_DIV(pitch); outb(TIMER_CNTR2, pitch); outb(TIMER_CNTR2, (pitch>>8)); if (!beeping) { /* enable counter2 output to speaker */ outb(IO_PPI, inb(IO_PPI) | 3); beeping = period; timeout(sysbeepstop, (void *)NULL, period); } splx(x); return (0); }