BSD 4_3_Tahoe release

[unix-history] / usr / src / sys / vax / clock.c

diff --git a/usr/src/sys/vax/clock.c b/usr/src/sys/vax/clock.c
index b378151..7d7ced5 100644 (file)
--- a/usr/src/sys/vax/clock.c
+++ b/usr/src/sys/vax/clock.c
@@ -1,11 +1,18 @@
-/*     clock.c 6.1     83/07/29        */
+/*
+ * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *     @(#)clock.c     7.3 (Berkeley) 7/9/88
+ */

 
 

-#include "../h/param.h"
-#include "../h/time.h"
-#include "../h/kernel.h"
+#include "param.h"
+#include "time.h"
+#include "kernel.h"

 
 

-#include "../vax/mtpr.h"
-#include "../vax/clock.h"
+#include "mtpr.h"
+#include "clock.h"
+#include "cpu.h"

 
 /*
  * Machine-dependent clock routines.
 
 /*
  * Machine-dependent clock routines.


@@ -26,80 +33,123 @@
 startrtclock()
 {
 
 startrtclock()
 {
 

-       mtpr(NICR, -1000000/hz);
-       mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);
+       (*cpuops->cpu_clock->clkstartrt)();

 }
 
 /*
  * 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,
 }
 
 /*
  * 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 provides the rest.
+ * and the time of year clock (if any) provides the rest.

  */
 inittodr(base)
        time_t base;
 {
  */
 inittodr(base)
        time_t base;
 {

-       register u_int todr = mfpr(TODR);
-       long deltat;
-       int year = YRREF;
+       long deltat, badbase = 0;

 
        if (base < 5*SECYR) {
 
        if (base < 5*SECYR) {

-               printf("WARNING: preposterous time in file system");
-               time.tv_sec = 6*SECYR + 186*SECDAY + SECDAY/2;
-               resettodr();
-               goto check;
+               printf("WARNING: preposterous time in file system\n");
+               /* read the system clock anyway */
+               base = 6*SECYR + 186*SECDAY + SECDAY/2;
+               badbase = 1;
+       }
+       switch ((*cpuops->cpu_clock->clkread)(base)) {
+
+       case CLKREAD_BAD:
+               /*
+                * Believe the time in the file system for lack of
+                * anything better, resetting the TODR.
+                */
+               time.tv_sec = base;
+               if (!badbase)
+                       resettodr();
+               break;
+
+       case CLKREAD_WARN:
+               break;
+
+       case CLKREAD_OK:
+               if (badbase)
+                       break;
+               /*
+                * See if we gained/lost two or more days;
+                * if so, assume something is amiss.
+                */
+               deltat = time.tv_sec - base;
+               if (deltat < 0)
+                       deltat = -deltat;
+               if (deltat < 2 * SECDAY)
+                       return;
+               printf("WARNING: clock %s %d days",
+                   time.tv_sec < base ? "lost" : "gained", deltat / SECDAY);
+               break;
+
+       default:
+               panic("inittodr");
+               /* NOTREACHED */

        }
        }

+       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.
+ */
+resettodr()
+{
+
+       (*cpuops->cpu_clock->clkwrite)();
+}
+
+/*
+ * ``Standard'' VAX clock routines.
+ */
+#if VAX8600 || VAX8200 || VAX780 || VAX750 || VAX730
+vaxstd_clkstartrt()
+{
+
+       mtpr(NICR, -1000000/hz);
+       mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);
+}
+#endif
+
+#if VAX8600 || VAX780 || VAX750 || VAX730
+vaxstd_clkread(base)
+       time_t base;
+{
+       register u_int todr = mfpr(TODR);
+       int year;
+

        /*
         * TODRZERO is base used by VMS, which runs on local time.
         */
        if (todr < TODRZERO) {
                printf("WARNING: todr too small");
        /*
         * TODRZERO is base used by VMS, which runs on local time.
         */
        if (todr < TODRZERO) {
                printf("WARNING: todr too small");

-               time.tv_sec = base;
-               /*
-                * Believe the time in the file system for lack of
-                * anything better, resetting the TODR.
-                */
-               resettodr();
-               goto check;
+               return (CLKREAD_BAD);

        }
 
        /*
        }
 
        /*

-        * Sneak to within 6 month of the time in the filesystem,
+        * Sneak to within 6 months of the time in the filesystem,

         * by starting with the time of the year suggested by the TODR,
         * and advancing through succesive years.  Adding the number of
         * seconds in the current year takes us to the end of the current year
         * and then around into the next year to the same position.
         */
         * by starting with the time of the year suggested by the TODR,
         * and advancing through succesive years.  Adding the number of
         * seconds in the current year takes us to the end of the current year
         * and then around into the next year to the same position.
         */

-       time.tv_sec = (todr-TODRZERO)/100;
-       while (time.tv_sec < base-SECYR/2) {
+       time.tv_sec = (todr - TODRZERO) / 100;
+       year = YRREF;
+       while (time.tv_sec < base - SECYR/2) {

                if (LEAPYEAR(year))
                        time.tv_sec += SECDAY;
                year++;
                time.tv_sec += SECYR;
        }
 
                if (LEAPYEAR(year))
                        time.tv_sec += SECDAY;
                year++;
                time.tv_sec += SECYR;
        }
 

-       /*
-        * See if we gained/lost two or more days;
-        * if so, assume something is amiss.
-        */
-       deltat = time.tv_sec - base;
-       if (deltat < 0)
-               deltat = -deltat;
-       if (deltat < 2*SECDAY)
-               return;
-       printf("WARNING: clock %s %d days",
-           time.tv_sec < base ? "lost" : "gained", deltat / SECDAY);
-check:
-       printf(" -- CHECK AND RESET THE DATE!\n");
+       return (CLKREAD_OK);

 }
 
 }
 

-/*
- * 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.
- */
-resettodr()
+vaxstd_clkwrite()

 {
        int year = YRREF;
        u_int secyr;
 {
        int year = YRREF;
        u_int secyr;


@@ -120,3 +170,68 @@ resettodr()
        }
        mtpr(TODR, TODRZERO + yrtime*100);
 }
        }
        mtpr(TODR, TODRZERO + yrtime*100);
 }

+#endif
+
+#if VAX8200 || VAX630
+/*
+ * This code is defunct after 2099.
+ * Will Unix still be here then??
+ */
+short dayyr[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
+
+chiptotime(c)
+       register struct chiptime *c;
+{
+       register int days, yr;
+
+       /* simple sanity checks */
+       if (c->year < 70 || c->mon < 1 || c->mon > 12 ||
+           c->day < 1 || c->day > 31) {
+               printf("WARNING: preposterous clock chip time");
+               return (0);
+       }
+       days = 0;
+       for (yr = 70; yr < c->year; yr++)
+               days += LEAPYEAR(yr) ? 366 : 365;
+       days += dayyr[c->mon - 1] + c->day - 1;
+       if (LEAPYEAR(yr) && c->mon > 2)
+               days++;
+       /* now have days since Jan 1, 1970; the rest is easy... */
+       return (days * SECDAY + c->hour * 3600 + c->min * 60 + c->sec);
+}
+
+timetochip(c)
+       register struct chiptime *c;
+{
+       register int t, t2, t3;
+
+       /* compute the year */
+       t2 = time.tv_sec / SECDAY;
+       t = 69;
+       while (t2 >= 0) {       /* whittle off years */
+               t3 = t2;
+               t++;
+               t2 -= LEAPYEAR(t) ? 366 : 365;
+       }
+       c->year = t;
+
+       /* t3 = month + day; separate */
+       t = LEAPYEAR(t);
+       for (t2 = 1; t2 < 12; t2++)
+               if (t3 < dayyr[t2] + (t && t2 > 1))
+                       break;
+
+       /* t2 is month */
+       c->mon = t2;
+       c->day = t3 - dayyr[t2 - 1] + 1;
+       if (t && t2 > 2)
+               c->day--;
+
+       /* the rest is easy */
+       t = time.tv_sec % SECDAY;
+       c->hour = t / 3600;
+       t %= 3600;
+       c->min = t / 60;
+       c->sec = t % 60;
+}
+#endif