[src/trunk]: src/sys/arch/atari/dev Add sanity checking on register B of the ...

[leo <leo%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1e7cc4aa1720
branches:  trunk
changeset: 509001:1e7cc4aa1720
user:      leo <leo%NetBSD.org@localhost>
date:      Tue Apr 24 06:26:48 2001 +0000

description:
Add sanity checking on register B of the mc146818.

diffstat:

 sys/arch/atari/dev/clock.c |  13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diffs (40 lines):

diff -r 557013d9961e -r 1e7cc4aa1720 sys/arch/atari/dev/clock.c
--- a/sys/arch/atari/dev/clock.c        Tue Apr 24 06:17:22 2001 +0000
+++ b/sys/arch/atari/dev/clock.c        Tue Apr 24 06:26:48 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: clock.c,v 1.24 2001/01/29 08:32:23 leo Exp $   */
+/*     $NetBSD: clock.c,v 1.25 2001/04/24 06:26:48 leo Exp $   */
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -418,12 +418,21 @@
 {
        int                     sps;
        mc_todregs              clkregs;
+       u_int                   regb;
        struct clock_ymdhms     dt;
 
        sps = splhigh();
+       regb = mc146818_read(RTC, MC_REGB);
        MC146818_GETTOD(RTC, &clkregs);
        splx(sps);
 
+       regb &= MC_REGB_24HR|MC_REGB_BINARY;
+       if (regb != (MC_REGB_24HR|MC_REGB_BINARY)) {
+               printf("Error: Nonstandard RealTimeClock Configuration -"
+                       " value ignored\n"
+                       "       A write to /dev/rtc will correct this.\n");
+                       return(0);
+       }
        if(clkregs[MC_SEC] > 59)
                return(0);
        if(clkregs[MC_MIN] > 59)
@@ -555,6 +564,8 @@
                return(EINVAL);
 
        s = splclock();
+       mc146818_write(RTC, MC_REGB,
+               mc146818_read(RTC, MC_REGB) | MC_REGB_24HR | MC_REGB_BINARY);
        MC146818_GETTOD(RTC, &clkregs);
        splx(s);