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-rw-r--r--sys/arch/i386/i386/machdep.c91
-rw-r--r--sys/arch/i386/include/cpu.h4
-rw-r--r--sys/arch/i386/isa/clock.c139
3 files changed, 146 insertions, 88 deletions
diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c
index 765d8dd57ab..7600f40c446 100644
--- a/sys/arch/i386/i386/machdep.c
+++ b/sys/arch/i386/i386/machdep.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: machdep.c,v 1.631 2019/06/14 18:13:55 kettenis Exp $ */
+/* $OpenBSD: machdep.c,v 1.632 2020/04/29 08:53:45 kettenis Exp $ */
/* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */
/*-
@@ -378,6 +378,7 @@ cpu_startup(void)
printf("%s", version);
startclocks();
+ rtcinit();
printf("real mem = %llu (%lluMB)\n",
(unsigned long long)ptoa((psize_t)physmem),
@@ -4037,3 +4038,91 @@ intr_barrier(void *ih)
sched_barrier(NULL);
}
+#include <sys/timetc.h>
+#include <dev/clock_subr.h>
+
+todr_chip_handle_t todr_handle;
+
+#define MINYEAR ((OpenBSD / 100) - 1) /* minimum plausible year */
+
+/*
+ * inittodr:
+ *
+ * Initialize time from the time-of-day register.
+ */
+void
+inittodr(time_t base)
+{
+ time_t deltat;
+ struct timeval rtctime;
+ struct timespec ts;
+ int badbase;
+
+ if (base < (MINYEAR - 1970) * SECYR) {
+ printf("WARNING: preposterous time in file system\n");
+ /* read the system clock anyway */
+ base = (MINYEAR - 1970) * SECYR;
+ badbase = 1;
+ } else
+ badbase = 0;
+
+ if (todr_handle == NULL ||
+ todr_gettime(todr_handle, &rtctime) != 0 ||
+ rtctime.tv_sec < (MINYEAR - 1970) * SECYR) {
+ /*
+ * Believe the time in the file system for lack of
+ * anything better, resetting the TODR.
+ */
+ rtctime.tv_sec = base;
+ rtctime.tv_usec = 0;
+ if (todr_handle != NULL && !badbase)
+ printf("WARNING: bad clock chip time\n");
+ ts.tv_sec = rtctime.tv_sec;
+ ts.tv_nsec = rtctime.tv_usec * 1000;
+ tc_setclock(&ts);
+ goto bad;
+ } else {
+ ts.tv_sec = rtctime.tv_sec;
+ ts.tv_nsec = rtctime.tv_usec * 1000;
+ tc_setclock(&ts);
+ }
+
+ if (!badbase) {
+ /*
+ * See if we gained/lost two or more days; if
+ * so, assume something is amiss.
+ */
+ deltat = rtctime.tv_sec - base;
+ if (deltat < 0)
+ deltat = -deltat;
+ if (deltat < 2 * SECDAY)
+ return; /* all is well */
+#ifndef SMALL_KERNEL
+ printf("WARNING: clock %s %lld days\n",
+ rtctime.tv_sec < base ? "lost" : "gained",
+ (long long)(deltat / SECDAY));
+#endif
+ }
+ bad:
+ printf("WARNING: CHECK AND RESET THE DATE!\n");
+}
+
+/*
+ * resettodr:
+ *
+ * Reset the time-of-day register with the current time.
+ */
+void
+resettodr(void)
+{
+ struct timeval rtctime;
+
+ if (time_second == 1)
+ return;
+
+ microtime(&rtctime);
+
+ if (todr_handle != NULL &&
+ todr_settime(todr_handle, &rtctime) != 0)
+ printf("WARNING: can't update clock chip time\n");
+}
diff --git a/sys/arch/i386/include/cpu.h b/sys/arch/i386/include/cpu.h
index 8f8d0535687..63e5e840e96 100644
--- a/sys/arch/i386/include/cpu.h
+++ b/sys/arch/i386/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.168 2019/12/20 07:55:30 jsg Exp $ */
+/* $OpenBSD: cpu.h,v 1.169 2020/04/29 08:53:45 kettenis Exp $ */
/* $NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $ */
/*-
@@ -421,7 +421,7 @@ void proc_trampoline(void);
/* clock.c */
extern void (*initclock_func)(void);
void startclocks(void);
-void rtcdrain(void *);
+void rtcinit(void);
void rtcstart(void);
void rtcstop(void);
void i8254_delay(int);
diff --git a/sys/arch/i386/isa/clock.c b/sys/arch/i386/isa/clock.c
index 2b3fe2e626f..836ac088662 100644
--- a/sys/arch/i386/isa/clock.c
+++ b/sys/arch/i386/isa/clock.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: clock.c,v 1.56 2019/08/22 01:11:19 deraadt Exp $ */
+/* $OpenBSD: clock.c,v 1.57 2020/04/29 08:53:45 kettenis Exp $ */
/* $NetBSD: clock.c,v 1.39 1996/05/12 23:11:54 mycroft Exp $ */
/*-
@@ -99,6 +99,7 @@ WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include <machine/pio.h>
#include <machine/cpufunc.h>
+#include <dev/clock_subr.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/ic/mc146818reg.h>
@@ -110,8 +111,6 @@ int clockintr(void *);
int gettick(void);
int rtcget(mc_todregs *);
void rtcput(mc_todregs *);
-int hexdectodec(int);
-int dectohexdec(int);
int rtcintr(void *);
void rtcdrain(void *);
int calibrate_cyclecounter_ctr(void);
@@ -481,21 +480,17 @@ rtcput(mc_todregs *regs)
}
int
-hexdectodec(int n)
+bcdtobin(int n)
{
-
return (((n >> 4) & 0x0f) * 10 + (n & 0x0f));
}
int
-dectohexdec(int n)
+bintobcd(int n)
{
-
return ((u_char)(((n / 10) << 4) & 0xf0) | ((n % 10) & 0x0f));
}
-static int timeset;
-
/*
* check whether the CMOS layout is "standard"-like (ie, not PS/2-like),
* to be called at splclock()
@@ -551,7 +546,7 @@ clock_expandyear(int clockyear)
#endif
return (clockyear);
}
- cmoscentury = hexdectodec(cmoscentury);
+ cmoscentury = bcdtobin(cmoscentury);
if (cmoscentury != clockcentury) {
/* XXX note: saying "century is 20" might confuse the naive. */
@@ -566,7 +561,7 @@ clock_expandyear(int clockyear)
clockcentury);
s = splclock();
mc146818_write(NULL, NVRAM_CENTURY,
- dectohexdec(clockcentury));
+ bintobcd(clockcentury));
splx(s);
}
} else if (cmoscentury == 19 && rtc_update_century == 0)
@@ -575,110 +570,84 @@ clock_expandyear(int clockyear)
return (clockyear);
}
-/*
- * Initialize the time of day register, based on the time base which is, e.g.
- * from a filesystem.
- */
-void
-inittodr(time_t base)
+int
+rtcgettime(struct todr_chip_handle *handle, struct timeval *tv)
{
- struct timespec ts;
mc_todregs rtclk;
struct clock_ymdhms dt;
int s;
-
-
- ts.tv_nsec = 0;
-
- /*
- * We mostly ignore the suggested time and go for the RTC clock time
- * stored in the CMOS RAM. If the time can't be obtained from the
- * CMOS, or if the time obtained from the CMOS is 5 or more years
- * less than the suggested time, we used the suggested time. (In
- * the latter case, it's likely that the CMOS battery has died.)
- */
-
- if (base < 15*SECYR) { /* if before 1985, something's odd... */
- printf("WARNING: preposterous time in file system\n");
- /* read the system clock anyway */
- base = 17*SECYR + 186*SECDAY + SECDAY/2;
- }
-
+
s = splclock();
if (rtcget(&rtclk)) {
splx(s);
- printf("WARNING: invalid time in clock chip\n");
- goto fstime;
+ return EINVAL;
}
splx(s);
- dt.dt_sec = hexdectodec(rtclk[MC_SEC]);
- dt.dt_min = hexdectodec(rtclk[MC_MIN]);
- dt.dt_hour = hexdectodec(rtclk[MC_HOUR]);
- dt.dt_day = hexdectodec(rtclk[MC_DOM]);
- dt.dt_mon = hexdectodec(rtclk[MC_MONTH]);
- dt.dt_year = clock_expandyear(hexdectodec(rtclk[MC_YEAR]));
-
- ts.tv_sec = clock_ymdhms_to_secs(&dt) - utc_offset;
-
- if (base < ts.tv_sec - 5*SECYR)
- printf("WARNING: file system time much less than clock time\n");
- else if (base > ts.tv_sec + 5*SECYR) {
- printf("WARNING: clock time much less than file system time\n");
- printf("WARNING: using file system time\n");
- goto fstime;
- }
+#ifdef CLOCK_DEBUG
+ printf("readclock: %x/%x/%x %x:%x:%x\n", rtclk[MC_YEAR],
+ rtclk[MC_MONTH], rtclk[MC_DOM], rtclk[MC_HOUR], rtclk[MC_MIN],
+ rtclk[MC_SEC]);
+#endif
- tc_setclock(&ts);
- timeset = 1;
- return;
+ dt.dt_sec = bcdtobin(rtclk[MC_SEC]);
+ dt.dt_min = bcdtobin(rtclk[MC_MIN]);
+ dt.dt_hour = bcdtobin(rtclk[MC_HOUR]);
+ dt.dt_day = bcdtobin(rtclk[MC_DOM]);
+ dt.dt_mon = bcdtobin(rtclk[MC_MONTH]);
+ dt.dt_year = clock_expandyear(bcdtobin(rtclk[MC_YEAR]));
-fstime:
- ts.tv_sec = base;
- tc_setclock(&ts);
- timeset = 1;
- printf("WARNING: CHECK AND RESET THE DATE!\n");
+ tv->tv_sec = clock_ymdhms_to_secs(&dt) - utc_offset;
+ tv->tv_usec = 0;
+ return 0;
}
-/*
- * Reset the clock.
- */
-void
-resettodr(void)
+int
+rtcsettime(struct todr_chip_handle *handle, struct timeval *tv)
{
mc_todregs rtclk;
struct clock_ymdhms dt;
- int century;
- int s;
-
- /*
- * We might have been called by boot() due to a crash early
- * on. Don't reset the clock chip in this case.
- */
- if (!timeset)
- return;
+ int century, s;
s = splclock();
if (rtcget(&rtclk))
- bzero(&rtclk, sizeof(rtclk));
+ memset(&rtclk, 0, sizeof(rtclk));
splx(s);
clock_secs_to_ymdhms(time_second + utc_offset, &dt);
- rtclk[MC_SEC] = dectohexdec(dt.dt_sec);
- rtclk[MC_MIN] = dectohexdec(dt.dt_min);
- rtclk[MC_HOUR] = dectohexdec(dt.dt_hour);
- rtclk[MC_DOW] = dt.dt_wday;
- rtclk[MC_YEAR] = dectohexdec(dt.dt_year % 100);
- rtclk[MC_MONTH] = dectohexdec(dt.dt_mon);
- rtclk[MC_DOM] = dectohexdec(dt.dt_day);
+ rtclk[MC_SEC] = bintobcd(dt.dt_sec);
+ rtclk[MC_MIN] = bintobcd(dt.dt_min);
+ rtclk[MC_HOUR] = bintobcd(dt.dt_hour);
+ rtclk[MC_DOW] = dt.dt_wday + 1;
+ rtclk[MC_YEAR] = bintobcd(dt.dt_year % 100);
+ rtclk[MC_MONTH] = bintobcd(dt.dt_mon);
+ rtclk[MC_DOM] = bintobcd(dt.dt_day);
+
+#ifdef CLOCK_DEBUG
+ printf("setclock: %x/%x/%x %x:%x:%x\n", rtclk[MC_YEAR], rtclk[MC_MONTH],
+ rtclk[MC_DOM], rtclk[MC_HOUR], rtclk[MC_MIN], rtclk[MC_SEC]);
+#endif
+
s = splclock();
rtcput(&rtclk);
if (rtc_update_century > 0) {
- century = dectohexdec(dt.dt_year / 100);
+ century = bintobcd(dt.dt_year / 100);
mc146818_write(NULL, NVRAM_CENTURY, century); /* XXX softc */
}
splx(s);
+ return 0;
+}
+
+extern todr_chip_handle_t todr_handle;
+struct todr_chip_handle rtc_todr;
+
+void
+rtcinit(void)
+{
+ rtc_todr.todr_gettime = rtcgettime;
+ rtc_todr.todr_settime = rtcsettime;
+ todr_handle = &rtc_todr;
}
void
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 13:36:00 +0000