diff options
Diffstat (limited to 'sys/boot/pc98/libpc98/time.c')
-rw-r--r-- | sys/boot/pc98/libpc98/time.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/sys/boot/pc98/libpc98/time.c b/sys/boot/pc98/libpc98/time.c index b8dbe02..5d832bb 100644 --- a/sys/boot/pc98/libpc98/time.c +++ b/sys/boot/pc98/libpc98/time.c @@ -33,23 +33,21 @@ __FBSDID("$FreeBSD$"); #include "bootstrap.h" #include "libi386.h" +static int bios_seconds(void); + /* - * Return the time in seconds since the beginning of the day. - * - * If we pass midnight, don't wrap back to 0. + * Return the BIOS time-of-day value. * * XXX uses undocumented BCD support from libstand. */ - -time_t -time(time_t *t) +static int +bios_seconds(void) { - static time_t lasttime, now; int hr, minute, sec; unsigned char bios_time[6]; - + v86.ctl = 0; - v86.addr = 0x1c; /* int 0x1c, function 0 */ + v86.addr = 0x1c; /* int 0x1c, function 0 */ v86.eax = 0x0000; v86.es = VTOPSEG(bios_time); v86.ebx = VTOPOFF(bios_time); @@ -59,7 +57,20 @@ time(time_t *t) minute = bcd2bin(bios_time[4]); sec = bcd2bin(bios_time[5]); - now = hr * 3600 + minute * 60 + sec; + return (hr * 3600 + minute * 60 + sec); +} + +/* + * Return the time in seconds since the beginning of the day. + */ +time_t +time(time_t *t) +{ + static time_t lasttime; + time_t now; + + now = bios_seconds(); + if (now < lasttime) now += 24 * 3600; lasttime = now; |