diff --git a/sys/alpha/alpha/clock.c b/sys/alpha/alpha/clock.c index 75f84b37b4fd..527a7dfaab2b 100644 --- a/sys/alpha/alpha/clock.c +++ b/sys/alpha/alpha/clock.c @@ -475,31 +475,20 @@ static short dayyr[12] = { * and the time of year clock (if any) provides the rest. */ void -inittodr(base) - time_t base; +inittodr(time_t base) { - register int days, yr; struct clocktime ct; - time_t deltat; - int badbase, clock_compat_osf1; - int s; struct timespec ts; - - if (base < 5*SECYR) { - printf("WARNING: preposterous time in filesystem"); - /* read the system clock anyway */ - base = 6*SECYR + 186*SECDAY + SECDAY/2; - badbase = 1; - } else - badbase = 0; + int clock_compat_osf1, todr_unreliable; + int days, yr; if (getenv_int("clock_compat_osf1", &clock_compat_osf1)) { if (clock_compat_osf1) clock_year_offset = UNIX_YEAR_OFFSET; } + todr_unreliable = 0; CLOCK_GET(clockdev, base, &ct); - clockinitted = 1; #ifdef DEBUG printf("readclock: %d/%d/%d/%d/%d/%d\n", ct.year, ct.mon, ct.day, @@ -508,7 +497,7 @@ inittodr(base) ct.year += clock_year_offset; if (ct.year < 70) ct.year += 100; - + /* 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) { @@ -516,48 +505,47 @@ inittodr(base) * Believe the time in the filesystem for lack of * anything better, resetting the TODR. */ - s = splclock(); ts.tv_sec = base; - ts.tv_nsec = 0; - tc_setclock(&ts); - splx(s); - if (!badbase) { - printf("WARNING: preposterous clock chip time\n"); - resettodr(); - } - goto bad; + printf("WARNING: preposterous real-time clock"); + todr_unreliable = 1; + } else { + 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... */ + ts.tv_sec = days * SECDAY + ct.hour * SECHOUR + + ct.min * SECMIN + ct.sec; + if (wall_cmos_clock) + ts.tv_sec += adjkerntz; + /* + * The time base comes from a saved time, whereas the real- + * time clock is supposed to represent the current time. + * It is logically not possible for a saved time to be + * larger than the current time, so if that happens, assume + * the real-time clock is off. Warn when the real-time + * clock is off by two or more days. + */ + if (ts.tv_sec < base) { + ts.tv_sec = base; + days = (base - ts.tv_sec) / (60L * 60L * 24L); + if (days >= 2) { + printf("WARNING: real-time clock lost %d days", + days); + todr_unreliable = 1; + } + } } - 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; tc_setclock(&ts); - splx(s); + clockinitted = 1; - 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); + if (todr_unreliable) { + printf(" -- CHECK AND RESET THE DATE!\n"); + resettodr(); } -bad: - printf(" -- CHECK AND RESET THE DATE!\n"); } /*